Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Digital Audio (PCM) abstract layer |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Abramo Bagnara <abramo@alsa-project.org> |
| 5 | * |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/slab.h> |
| 24 | #include <linux/time.h> |
Takashi Iwai | 3f7440a | 2009-06-05 17:40:04 +0200 | [diff] [blame] | 25 | #include <linux/math64.h> |
Paul Gortmaker | d81a6d7 | 2011-09-22 09:34:58 -0400 | [diff] [blame] | 26 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <sound/core.h> |
| 28 | #include <sound/control.h> |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 29 | #include <sound/tlv.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <sound/info.h> |
| 31 | #include <sound/pcm.h> |
| 32 | #include <sound/pcm_params.h> |
| 33 | #include <sound/timer.h> |
| 34 | |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 35 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
| 36 | #define CREATE_TRACE_POINTS |
| 37 | #include "pcm_trace.h" |
| 38 | #else |
| 39 | #define trace_hwptr(substream, pos, in_interrupt) |
| 40 | #define trace_xrun(substream) |
| 41 | #define trace_hw_ptr_error(substream, reason) |
| 42 | #endif |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | /* |
| 45 | * fill ring buffer with silence |
| 46 | * runtime->silence_start: starting pointer to silence area |
| 47 | * runtime->silence_filled: size filled with silence |
| 48 | * runtime->silence_threshold: threshold from application |
| 49 | * runtime->silence_size: maximal size from application |
| 50 | * |
| 51 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately |
| 52 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 53 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 55 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | snd_pcm_uframes_t frames, ofs, transfer; |
| 57 | |
| 58 | if (runtime->silence_size < runtime->boundary) { |
| 59 | snd_pcm_sframes_t noise_dist, n; |
| 60 | if (runtime->silence_start != runtime->control->appl_ptr) { |
| 61 | n = runtime->control->appl_ptr - runtime->silence_start; |
| 62 | if (n < 0) |
| 63 | n += runtime->boundary; |
| 64 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) |
| 65 | runtime->silence_filled -= n; |
| 66 | else |
| 67 | runtime->silence_filled = 0; |
| 68 | runtime->silence_start = runtime->control->appl_ptr; |
| 69 | } |
Takashi Iwai | 235475c | 2005-12-07 15:28:07 +0100 | [diff] [blame] | 70 | if (runtime->silence_filled >= runtime->buffer_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
| 73 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) |
| 74 | return; |
| 75 | frames = runtime->silence_threshold - noise_dist; |
| 76 | if (frames > runtime->silence_size) |
| 77 | frames = runtime->silence_size; |
| 78 | } else { |
| 79 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ |
| 80 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); |
Jaroslav Kysela | 9e216e8 | 2010-07-19 16:37:39 +0200 | [diff] [blame] | 81 | if (avail > runtime->buffer_size) |
| 82 | avail = runtime->buffer_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | runtime->silence_filled = avail > 0 ? avail : 0; |
| 84 | runtime->silence_start = (runtime->status->hw_ptr + |
| 85 | runtime->silence_filled) % |
| 86 | runtime->boundary; |
| 87 | } else { |
| 88 | ofs = runtime->status->hw_ptr; |
| 89 | frames = new_hw_ptr - ofs; |
| 90 | if ((snd_pcm_sframes_t)frames < 0) |
| 91 | frames += runtime->boundary; |
| 92 | runtime->silence_filled -= frames; |
| 93 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { |
| 94 | runtime->silence_filled = 0; |
Clemens Ladisch | 9a826dd | 2006-10-23 16:26:57 +0200 | [diff] [blame] | 95 | runtime->silence_start = new_hw_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } else { |
Clemens Ladisch | 9a826dd | 2006-10-23 16:26:57 +0200 | [diff] [blame] | 97 | runtime->silence_start = ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
| 100 | frames = runtime->buffer_size - runtime->silence_filled; |
| 101 | } |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 102 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
| 103 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | if (frames == 0) |
| 105 | return; |
Clemens Ladisch | 9a826dd | 2006-10-23 16:26:57 +0200 | [diff] [blame] | 106 | ofs = runtime->silence_start % runtime->buffer_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | while (frames > 0) { |
| 108 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; |
| 109 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || |
| 110 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { |
| 111 | if (substream->ops->silence) { |
| 112 | int err; |
| 113 | err = substream->ops->silence(substream, -1, ofs, transfer); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 114 | snd_BUG_ON(err < 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } else { |
| 116 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); |
| 117 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); |
| 118 | } |
| 119 | } else { |
| 120 | unsigned int c; |
| 121 | unsigned int channels = runtime->channels; |
| 122 | if (substream->ops->silence) { |
| 123 | for (c = 0; c < channels; ++c) { |
| 124 | int err; |
| 125 | err = substream->ops->silence(substream, c, ofs, transfer); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 126 | snd_BUG_ON(err < 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
| 128 | } else { |
| 129 | size_t dma_csize = runtime->dma_bytes / channels; |
| 130 | for (c = 0; c < channels; ++c) { |
| 131 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); |
| 132 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); |
| 133 | } |
| 134 | } |
| 135 | } |
| 136 | runtime->silence_filled += transfer; |
| 137 | frames -= transfer; |
| 138 | ofs = 0; |
| 139 | } |
| 140 | } |
| 141 | |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 142 | #ifdef CONFIG_SND_DEBUG |
| 143 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, |
Takashi Iwai | c007011 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 144 | char *name, size_t len) |
| 145 | { |
| 146 | snprintf(name, len, "pcmC%dD%d%c:%d", |
| 147 | substream->pcm->card->number, |
| 148 | substream->pcm->device, |
| 149 | substream->stream ? 'c' : 'p', |
| 150 | substream->number); |
| 151 | } |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 152 | EXPORT_SYMBOL(snd_pcm_debug_name); |
| 153 | #endif |
Takashi Iwai | c007011 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 154 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 155 | #define XRUN_DEBUG_BASIC (1<<0) |
| 156 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ |
| 157 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 158 | |
| 159 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
| 160 | |
| 161 | #define xrun_debug(substream, mask) \ |
| 162 | ((substream)->pstr->xrun_debug & (mask)) |
Jarkko Nikula | 0f17014 | 2010-03-26 16:07:25 +0200 | [diff] [blame] | 163 | #else |
| 164 | #define xrun_debug(substream, mask) 0 |
| 165 | #endif |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 166 | |
| 167 | #define dump_stack_on_xrun(substream) do { \ |
| 168 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ |
| 169 | dump_stack(); \ |
| 170 | } while (0) |
| 171 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 172 | static void xrun(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | { |
Jaroslav Kysela | 13f040f | 2009-05-28 11:31:20 +0200 | [diff] [blame] | 174 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 175 | |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 176 | trace_xrun(substream); |
Jaroslav Kysela | 13f040f | 2009-05-28 11:31:20 +0200 | [diff] [blame] | 177 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
| 178 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
Jaroslav Kysela | 741b20c | 2009-12-17 17:34:39 +0100 | [diff] [blame] | 180 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
Takashi Iwai | c007011 | 2009-06-08 15:58:48 +0200 | [diff] [blame] | 181 | char name[16]; |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 182 | snd_pcm_debug_name(substream, name, sizeof(name)); |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 183 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 184 | dump_stack_on_xrun(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Jarkko Nikula | 0f17014 | 2010-03-26 16:07:25 +0200 | [diff] [blame] | 188 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 189 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 190 | do { \ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 191 | trace_hw_ptr_error(substream, reason); \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 192 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 193 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
| 194 | (in_interrupt) ? 'Q' : 'P', ##args); \ |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 195 | dump_stack_on_xrun(substream); \ |
| 196 | } \ |
| 197 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 199 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
| 200 | |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 201 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
Jaroslav Kysela | 4d96eb2 | 2009-12-20 11:47:57 +0100 | [diff] [blame] | 202 | |
| 203 | #endif |
| 204 | |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 205 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
| 206 | struct snd_pcm_runtime *runtime) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | { |
| 208 | snd_pcm_uframes_t avail; |
| 209 | |
| 210 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 211 | avail = snd_pcm_playback_avail(runtime); |
| 212 | else |
| 213 | avail = snd_pcm_capture_avail(runtime); |
| 214 | if (avail > runtime->avail_max) |
| 215 | runtime->avail_max = avail; |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 216 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
| 217 | if (avail >= runtime->buffer_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | snd_pcm_drain_done(substream); |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 219 | return -EPIPE; |
| 220 | } |
| 221 | } else { |
| 222 | if (avail >= runtime->stop_threshold) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | xrun(substream); |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 224 | return -EPIPE; |
| 225 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | } |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 227 | if (runtime->twake) { |
| 228 | if (avail >= runtime->twake) |
| 229 | wake_up(&runtime->tsleep); |
| 230 | } else if (avail >= runtime->control->avail_min) |
| 231 | wake_up(&runtime->sleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | return 0; |
| 233 | } |
| 234 | |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 235 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
| 236 | unsigned int in_interrupt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 238 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | snd_pcm_uframes_t pos; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 240 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 241 | snd_pcm_sframes_t hdelta, delta; |
| 242 | unsigned long jdelta; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 243 | unsigned long curr_jiffies; |
| 244 | struct timespec curr_tstamp; |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 245 | struct timespec audio_tstamp; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 246 | int crossed_boundary = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 248 | old_hw_ptr = runtime->status->hw_ptr; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 249 | |
| 250 | /* |
| 251 | * group pointer, time and jiffies reads to allow for more |
| 252 | * accurate correlations/corrections. |
| 253 | * The values are stored at the end of this routine after |
| 254 | * corrections for hw_ptr position |
| 255 | */ |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 256 | pos = substream->ops->pointer(substream); |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 257 | curr_jiffies = jiffies; |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 258 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 259 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); |
| 260 | |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 261 | if ((runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) && |
| 262 | (substream->ops->wall_clock)) |
| 263 | substream->ops->wall_clock(substream, &audio_tstamp); |
| 264 | } |
| 265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | if (pos == SNDRV_PCM_POS_XRUN) { |
| 267 | xrun(substream); |
| 268 | return -EPIPE; |
| 269 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 270 | if (pos >= runtime->buffer_size) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 271 | if (printk_ratelimit()) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 272 | char name[16]; |
Eliot Blennerhassett | acb03d4 | 2011-07-23 12:36:25 +1200 | [diff] [blame] | 273 | snd_pcm_debug_name(substream, name, sizeof(name)); |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 274 | pcm_err(substream->pcm, |
Takashi Iwai | d507941 | 2014-11-04 13:57:15 +0100 | [diff] [blame] | 275 | "BUG: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 276 | name, pos, runtime->buffer_size, |
| 277 | runtime->period_size); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 278 | } |
| 279 | pos = 0; |
Takashi Iwai | cedb811 | 2009-07-23 11:04:13 +0200 | [diff] [blame] | 280 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 281 | pos -= pos % runtime->min_align; |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 282 | trace_hwptr(substream, pos, in_interrupt); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 283 | hw_base = runtime->hw_ptr_base; |
| 284 | new_hw_ptr = hw_base + pos; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 285 | if (in_interrupt) { |
| 286 | /* we know that one period was processed */ |
| 287 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 288 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 289 | if (delta > new_hw_ptr) { |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 290 | /* check for double acknowledged interrupts */ |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 291 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 292 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { |
| 293 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 294 | if (hw_base >= runtime->boundary) { |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 295 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 296 | crossed_boundary++; |
| 297 | } |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 298 | new_hw_ptr = hw_base + pos; |
| 299 | goto __delta; |
| 300 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 303 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
| 304 | /* pointer crosses the end of the ring buffer */ |
| 305 | if (new_hw_ptr < old_hw_ptr) { |
| 306 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 307 | if (hw_base >= runtime->boundary) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 308 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 309 | crossed_boundary++; |
| 310 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 311 | new_hw_ptr = hw_base + pos; |
| 312 | } |
| 313 | __delta: |
Clemens Ladisch | b406e61 | 2010-05-25 09:01:46 +0200 | [diff] [blame] | 314 | delta = new_hw_ptr - old_hw_ptr; |
| 315 | if (delta < 0) |
| 316 | delta += runtime->boundary; |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 317 | |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 318 | if (runtime->no_period_wakeup) { |
Kelly Anderson | 12ff414 | 2011-04-01 11:58:25 +0200 | [diff] [blame] | 319 | snd_pcm_sframes_t xrun_threshold; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 320 | /* |
| 321 | * Without regular period interrupts, we have to check |
| 322 | * the elapsed time to detect xruns. |
| 323 | */ |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 324 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Clemens Ladisch | 47228e4 | 2010-11-18 09:53:07 +0100 | [diff] [blame] | 325 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
| 326 | goto no_delta_check; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 327 | hdelta = jdelta - delta * HZ / runtime->rate; |
Kelly Anderson | 12ff414 | 2011-04-01 11:58:25 +0200 | [diff] [blame] | 328 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
| 329 | while (hdelta > xrun_threshold) { |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 330 | delta += runtime->buffer_size; |
| 331 | hw_base += runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 332 | if (hw_base >= runtime->boundary) { |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 333 | hw_base = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 334 | crossed_boundary++; |
| 335 | } |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 336 | new_hw_ptr = hw_base + pos; |
| 337 | hdelta -= runtime->hw_ptr_buffer_jiffies; |
| 338 | } |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 339 | goto no_delta_check; |
Clemens Ladisch | 59ff878 | 2010-11-18 09:43:52 +0100 | [diff] [blame] | 340 | } |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 341 | |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 342 | /* something must be really wrong */ |
Jaroslav Kysela | 7b3a177 | 2010-01-08 08:43:01 +0100 | [diff] [blame] | 343 | if (delta >= runtime->buffer_size + runtime->period_size) { |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 344 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
| 345 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", |
| 346 | substream->stream, (long)pos, |
| 347 | (long)new_hw_ptr, (long)old_hw_ptr); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 348 | return 0; |
| 349 | } |
Takashi Iwai | c87d973 | 2009-05-27 10:53:33 +0200 | [diff] [blame] | 350 | |
| 351 | /* Do jiffies check only in xrun_debug mode */ |
Jaroslav Kysela | 741b20c | 2009-12-17 17:34:39 +0100 | [diff] [blame] | 352 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
Takashi Iwai | c87d973 | 2009-05-27 10:53:33 +0200 | [diff] [blame] | 353 | goto no_jiffies_check; |
| 354 | |
Takashi Iwai | 3e5b501 | 2009-04-28 12:07:08 +0200 | [diff] [blame] | 355 | /* Skip the jiffies check for hardwares with BATCH flag. |
| 356 | * Such hardware usually just increases the position at each IRQ, |
| 357 | * thus it can't give any strange position. |
| 358 | */ |
| 359 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) |
| 360 | goto no_jiffies_check; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 361 | hdelta = delta; |
Jaroslav Kysela | a4444da | 2009-05-28 12:31:56 +0200 | [diff] [blame] | 362 | if (hdelta < runtime->delay) |
| 363 | goto no_jiffies_check; |
| 364 | hdelta -= runtime->delay; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 365 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 366 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
| 367 | delta = jdelta / |
| 368 | (((runtime->period_size * HZ) / runtime->rate) |
| 369 | + HZ/100); |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 370 | /* move new_hw_ptr according jiffies not pos variable */ |
| 371 | new_hw_ptr = old_hw_ptr; |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 372 | hw_base = delta; |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 373 | /* use loop to avoid checks for delta overflows */ |
| 374 | /* the delta value is small or zero in most cases */ |
| 375 | while (delta > 0) { |
| 376 | new_hw_ptr += runtime->period_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 377 | if (new_hw_ptr >= runtime->boundary) { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 378 | new_hw_ptr -= runtime->boundary; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 379 | crossed_boundary--; |
| 380 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 381 | delta--; |
| 382 | } |
| 383 | /* align hw_base to buffer_size */ |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 384 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
| 385 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 386 | (long)pos, (long)hdelta, |
| 387 | (long)runtime->period_size, jdelta, |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 388 | ((hdelta * HZ) / runtime->rate), hw_base, |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 389 | (unsigned long)old_hw_ptr, |
| 390 | (unsigned long)new_hw_ptr); |
Jaroslav Kysela | ed69c6a | 2010-01-13 08:12:31 +0100 | [diff] [blame] | 391 | /* reset values to proper state */ |
| 392 | delta = 0; |
| 393 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 394 | } |
Takashi Iwai | 3e5b501 | 2009-04-28 12:07:08 +0200 | [diff] [blame] | 395 | no_jiffies_check: |
Jaroslav Kysela | bbf6ad1 | 2009-04-10 12:28:58 +0200 | [diff] [blame] | 396 | if (delta > runtime->period_size + runtime->period_size / 2) { |
Takashi Iwai | f591490 | 2014-11-04 12:45:59 +0100 | [diff] [blame^] | 397 | hw_ptr_error(substream, in_interrupt, |
| 398 | "Lost interrupts?", |
| 399 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 400 | substream->stream, (long)delta, |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 401 | (long)new_hw_ptr, |
| 402 | (long)old_hw_ptr); |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 403 | } |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 404 | |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 405 | no_delta_check: |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 406 | if (runtime->status->hw_ptr == new_hw_ptr) |
| 407 | return 0; |
Takashi Iwai | ab1863f | 2009-06-07 12:09:17 +0200 | [diff] [blame] | 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| 410 | runtime->silence_size > 0) |
| 411 | snd_pcm_playback_silence(substream, new_hw_ptr); |
| 412 | |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 413 | if (in_interrupt) { |
Clemens Ladisch | ead4046 | 2010-05-21 09:15:59 +0200 | [diff] [blame] | 414 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
| 415 | if (delta < 0) |
| 416 | delta += runtime->boundary; |
| 417 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; |
| 418 | runtime->hw_ptr_interrupt += delta; |
| 419 | if (runtime->hw_ptr_interrupt >= runtime->boundary) |
| 420 | runtime->hw_ptr_interrupt -= runtime->boundary; |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 421 | } |
Takashi Iwai | ed3da3d | 2009-03-03 17:00:15 +0100 | [diff] [blame] | 422 | runtime->hw_ptr_base = hw_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | runtime->status->hw_ptr = new_hw_ptr; |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 424 | runtime->hw_ptr_jiffies = curr_jiffies; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 425 | if (crossed_boundary) { |
| 426 | snd_BUG_ON(crossed_boundary != 1); |
| 427 | runtime->hw_ptr_wrap += runtime->boundary; |
| 428 | } |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 429 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
Pierre-Louis Bossart | 3509a03 | 2012-05-22 14:54:02 -0500 | [diff] [blame] | 430 | runtime->status->tstamp = curr_tstamp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
Pierre-Louis Bossart | 4eeaaea | 2012-10-22 16:42:15 -0500 | [diff] [blame] | 432 | if (!(runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)) { |
| 433 | /* |
| 434 | * no wall clock available, provide audio timestamp |
| 435 | * derived from pointer position+delay |
| 436 | */ |
| 437 | u64 audio_frames, audio_nsecs; |
| 438 | |
| 439 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 440 | audio_frames = runtime->hw_ptr_wrap |
| 441 | + runtime->status->hw_ptr |
| 442 | - runtime->delay; |
| 443 | else |
| 444 | audio_frames = runtime->hw_ptr_wrap |
| 445 | + runtime->status->hw_ptr |
| 446 | + runtime->delay; |
| 447 | audio_nsecs = div_u64(audio_frames * 1000000000LL, |
| 448 | runtime->rate); |
| 449 | audio_tstamp = ns_to_timespec(audio_nsecs); |
| 450 | } |
| 451 | runtime->status->audio_tstamp = audio_tstamp; |
| 452 | } |
| 453 | |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 454 | return snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | } |
| 456 | |
| 457 | /* CAUTION: call it with irq disabled */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 458 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | { |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 460 | return snd_pcm_update_hw_ptr0(substream, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | /** |
| 464 | * snd_pcm_set_ops - set the PCM operators |
| 465 | * @pcm: the pcm instance |
| 466 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX |
| 467 | * @ops: the operator table |
| 468 | * |
| 469 | * Sets the given PCM operators to the pcm instance. |
| 470 | */ |
Lars-Peter Clausen | e6c2e7e | 2013-05-24 15:18:10 +0200 | [diff] [blame] | 471 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
| 472 | const struct snd_pcm_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 474 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
| 475 | struct snd_pcm_substream *substream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
| 477 | for (substream = stream->substream; substream != NULL; substream = substream->next) |
| 478 | substream->ops = ops; |
| 479 | } |
| 480 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 481 | EXPORT_SYMBOL(snd_pcm_set_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | /** |
| 484 | * snd_pcm_sync - set the PCM sync id |
| 485 | * @substream: the pcm substream |
| 486 | * |
| 487 | * Sets the PCM sync identifier for the card. |
| 488 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 489 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 491 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
| 493 | runtime->sync.id32[0] = substream->pcm->card->number; |
| 494 | runtime->sync.id32[1] = -1; |
| 495 | runtime->sync.id32[2] = -1; |
| 496 | runtime->sync.id32[3] = -1; |
| 497 | } |
| 498 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 499 | EXPORT_SYMBOL(snd_pcm_set_sync); |
| 500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | /* |
| 502 | * Standard ioctl routine |
| 503 | */ |
| 504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | static inline unsigned int div32(unsigned int a, unsigned int b, |
| 506 | unsigned int *r) |
| 507 | { |
| 508 | if (b == 0) { |
| 509 | *r = 0; |
| 510 | return UINT_MAX; |
| 511 | } |
| 512 | *r = a % b; |
| 513 | return a / b; |
| 514 | } |
| 515 | |
| 516 | static inline unsigned int div_down(unsigned int a, unsigned int b) |
| 517 | { |
| 518 | if (b == 0) |
| 519 | return UINT_MAX; |
| 520 | return a / b; |
| 521 | } |
| 522 | |
| 523 | static inline unsigned int div_up(unsigned int a, unsigned int b) |
| 524 | { |
| 525 | unsigned int r; |
| 526 | unsigned int q; |
| 527 | if (b == 0) |
| 528 | return UINT_MAX; |
| 529 | q = div32(a, b, &r); |
| 530 | if (r) |
| 531 | ++q; |
| 532 | return q; |
| 533 | } |
| 534 | |
| 535 | static inline unsigned int mul(unsigned int a, unsigned int b) |
| 536 | { |
| 537 | if (a == 0) |
| 538 | return 0; |
| 539 | if (div_down(UINT_MAX, a) < b) |
| 540 | return UINT_MAX; |
| 541 | return a * b; |
| 542 | } |
| 543 | |
| 544 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, |
| 545 | unsigned int c, unsigned int *r) |
| 546 | { |
| 547 | u_int64_t n = (u_int64_t) a * b; |
| 548 | if (c == 0) { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 549 | snd_BUG_ON(!n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | *r = 0; |
| 551 | return UINT_MAX; |
| 552 | } |
Takashi Iwai | 3f7440a | 2009-06-05 17:40:04 +0200 | [diff] [blame] | 553 | n = div_u64_rem(n, c, r); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | if (n >= UINT_MAX) { |
| 555 | *r = 0; |
| 556 | return UINT_MAX; |
| 557 | } |
| 558 | return n; |
| 559 | } |
| 560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | /** |
| 562 | * snd_interval_refine - refine the interval value of configurator |
| 563 | * @i: the interval value to refine |
| 564 | * @v: the interval value to refer to |
| 565 | * |
| 566 | * Refines the interval value with the reference value. |
| 567 | * The interval is changed to the range satisfying both intervals. |
| 568 | * The interval status (min, max, integer, etc.) are evaluated. |
| 569 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 570 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 571 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 573 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | { |
| 575 | int changed = 0; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 576 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 577 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | if (i->min < v->min) { |
| 579 | i->min = v->min; |
| 580 | i->openmin = v->openmin; |
| 581 | changed = 1; |
| 582 | } else if (i->min == v->min && !i->openmin && v->openmin) { |
| 583 | i->openmin = 1; |
| 584 | changed = 1; |
| 585 | } |
| 586 | if (i->max > v->max) { |
| 587 | i->max = v->max; |
| 588 | i->openmax = v->openmax; |
| 589 | changed = 1; |
| 590 | } else if (i->max == v->max && !i->openmax && v->openmax) { |
| 591 | i->openmax = 1; |
| 592 | changed = 1; |
| 593 | } |
| 594 | if (!i->integer && v->integer) { |
| 595 | i->integer = 1; |
| 596 | changed = 1; |
| 597 | } |
| 598 | if (i->integer) { |
| 599 | if (i->openmin) { |
| 600 | i->min++; |
| 601 | i->openmin = 0; |
| 602 | } |
| 603 | if (i->openmax) { |
| 604 | i->max--; |
| 605 | i->openmax = 0; |
| 606 | } |
| 607 | } else if (!i->openmin && !i->openmax && i->min == i->max) |
| 608 | i->integer = 1; |
| 609 | if (snd_interval_checkempty(i)) { |
| 610 | snd_interval_none(i); |
| 611 | return -EINVAL; |
| 612 | } |
| 613 | return changed; |
| 614 | } |
| 615 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 616 | EXPORT_SYMBOL(snd_interval_refine); |
| 617 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 618 | static int snd_interval_refine_first(struct snd_interval *i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 620 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 621 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | if (snd_interval_single(i)) |
| 623 | return 0; |
| 624 | i->max = i->min; |
| 625 | i->openmax = i->openmin; |
| 626 | if (i->openmax) |
| 627 | i->max++; |
| 628 | return 1; |
| 629 | } |
| 630 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 631 | static int snd_interval_refine_last(struct snd_interval *i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 633 | if (snd_BUG_ON(snd_interval_empty(i))) |
| 634 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | if (snd_interval_single(i)) |
| 636 | return 0; |
| 637 | i->min = i->max; |
| 638 | i->openmin = i->openmax; |
| 639 | if (i->openmin) |
| 640 | i->min--; |
| 641 | return 1; |
| 642 | } |
| 643 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 644 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | { |
| 646 | if (a->empty || b->empty) { |
| 647 | snd_interval_none(c); |
| 648 | return; |
| 649 | } |
| 650 | c->empty = 0; |
| 651 | c->min = mul(a->min, b->min); |
| 652 | c->openmin = (a->openmin || b->openmin); |
| 653 | c->max = mul(a->max, b->max); |
| 654 | c->openmax = (a->openmax || b->openmax); |
| 655 | c->integer = (a->integer && b->integer); |
| 656 | } |
| 657 | |
| 658 | /** |
| 659 | * snd_interval_div - refine the interval value with division |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 660 | * @a: dividend |
| 661 | * @b: divisor |
| 662 | * @c: quotient |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | * |
| 664 | * c = a / b |
| 665 | * |
| 666 | * Returns non-zero if the value is changed, zero if not changed. |
| 667 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 668 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | { |
| 670 | unsigned int r; |
| 671 | if (a->empty || b->empty) { |
| 672 | snd_interval_none(c); |
| 673 | return; |
| 674 | } |
| 675 | c->empty = 0; |
| 676 | c->min = div32(a->min, b->max, &r); |
| 677 | c->openmin = (r || a->openmin || b->openmax); |
| 678 | if (b->min > 0) { |
| 679 | c->max = div32(a->max, b->min, &r); |
| 680 | if (r) { |
| 681 | c->max++; |
| 682 | c->openmax = 1; |
| 683 | } else |
| 684 | c->openmax = (a->openmax || b->openmin); |
| 685 | } else { |
| 686 | c->max = UINT_MAX; |
| 687 | c->openmax = 0; |
| 688 | } |
| 689 | c->integer = 0; |
| 690 | } |
| 691 | |
| 692 | /** |
| 693 | * snd_interval_muldivk - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 694 | * @a: dividend 1 |
| 695 | * @b: dividend 2 |
| 696 | * @k: divisor (as integer) |
| 697 | * @c: result |
| 698 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | * c = a * b / k |
| 700 | * |
| 701 | * Returns non-zero if the value is changed, zero if not changed. |
| 702 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 703 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
| 704 | unsigned int k, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | { |
| 706 | unsigned int r; |
| 707 | if (a->empty || b->empty) { |
| 708 | snd_interval_none(c); |
| 709 | return; |
| 710 | } |
| 711 | c->empty = 0; |
| 712 | c->min = muldiv32(a->min, b->min, k, &r); |
| 713 | c->openmin = (r || a->openmin || b->openmin); |
| 714 | c->max = muldiv32(a->max, b->max, k, &r); |
| 715 | if (r) { |
| 716 | c->max++; |
| 717 | c->openmax = 1; |
| 718 | } else |
| 719 | c->openmax = (a->openmax || b->openmax); |
| 720 | c->integer = 0; |
| 721 | } |
| 722 | |
| 723 | /** |
| 724 | * snd_interval_mulkdiv - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 725 | * @a: dividend 1 |
| 726 | * @k: dividend 2 (as integer) |
| 727 | * @b: divisor |
| 728 | * @c: result |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | * |
| 730 | * c = a * k / b |
| 731 | * |
| 732 | * Returns non-zero if the value is changed, zero if not changed. |
| 733 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 734 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
| 735 | const struct snd_interval *b, struct snd_interval *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | { |
| 737 | unsigned int r; |
| 738 | if (a->empty || b->empty) { |
| 739 | snd_interval_none(c); |
| 740 | return; |
| 741 | } |
| 742 | c->empty = 0; |
| 743 | c->min = muldiv32(a->min, k, b->max, &r); |
| 744 | c->openmin = (r || a->openmin || b->openmax); |
| 745 | if (b->min > 0) { |
| 746 | c->max = muldiv32(a->max, k, b->min, &r); |
| 747 | if (r) { |
| 748 | c->max++; |
| 749 | c->openmax = 1; |
| 750 | } else |
| 751 | c->openmax = (a->openmax || b->openmin); |
| 752 | } else { |
| 753 | c->max = UINT_MAX; |
| 754 | c->openmax = 0; |
| 755 | } |
| 756 | c->integer = 0; |
| 757 | } |
| 758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | /* ---- */ |
| 760 | |
| 761 | |
| 762 | /** |
| 763 | * snd_interval_ratnum - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 764 | * @i: interval to refine |
| 765 | * @rats_count: number of ratnum_t |
| 766 | * @rats: ratnum_t array |
| 767 | * @nump: pointer to store the resultant numerator |
| 768 | * @denp: pointer to store the resultant denominator |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 770 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 771 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 773 | int snd_interval_ratnum(struct snd_interval *i, |
| 774 | unsigned int rats_count, struct snd_ratnum *rats, |
| 775 | unsigned int *nump, unsigned int *denp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | { |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 777 | unsigned int best_num, best_den; |
| 778 | int best_diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | unsigned int k; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 780 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | int err; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 782 | unsigned int result_num, result_den; |
| 783 | int result_diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
| 785 | best_num = best_den = best_diff = 0; |
| 786 | for (k = 0; k < rats_count; ++k) { |
| 787 | unsigned int num = rats[k].num; |
| 788 | unsigned int den; |
| 789 | unsigned int q = i->min; |
| 790 | int diff; |
| 791 | if (q == 0) |
| 792 | q = 1; |
Krzysztof Helt | 40962d7 | 2009-12-19 18:31:04 +0100 | [diff] [blame] | 793 | den = div_up(num, q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | if (den < rats[k].den_min) |
| 795 | continue; |
| 796 | if (den > rats[k].den_max) |
| 797 | den = rats[k].den_max; |
| 798 | else { |
| 799 | unsigned int r; |
| 800 | r = (den - rats[k].den_min) % rats[k].den_step; |
| 801 | if (r != 0) |
| 802 | den -= r; |
| 803 | } |
| 804 | diff = num - q * den; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 805 | if (diff < 0) |
| 806 | diff = -diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | if (best_num == 0 || |
| 808 | diff * best_den < best_diff * den) { |
| 809 | best_diff = diff; |
| 810 | best_den = den; |
| 811 | best_num = num; |
| 812 | } |
| 813 | } |
| 814 | if (best_den == 0) { |
| 815 | i->empty = 1; |
| 816 | return -EINVAL; |
| 817 | } |
| 818 | t.min = div_down(best_num, best_den); |
| 819 | t.openmin = !!(best_num % best_den); |
| 820 | |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 821 | result_num = best_num; |
| 822 | result_diff = best_diff; |
| 823 | result_den = best_den; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | best_num = best_den = best_diff = 0; |
| 825 | for (k = 0; k < rats_count; ++k) { |
| 826 | unsigned int num = rats[k].num; |
| 827 | unsigned int den; |
| 828 | unsigned int q = i->max; |
| 829 | int diff; |
| 830 | if (q == 0) { |
| 831 | i->empty = 1; |
| 832 | return -EINVAL; |
| 833 | } |
Krzysztof Helt | 40962d7 | 2009-12-19 18:31:04 +0100 | [diff] [blame] | 834 | den = div_down(num, q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | if (den > rats[k].den_max) |
| 836 | continue; |
| 837 | if (den < rats[k].den_min) |
| 838 | den = rats[k].den_min; |
| 839 | else { |
| 840 | unsigned int r; |
| 841 | r = (den - rats[k].den_min) % rats[k].den_step; |
| 842 | if (r != 0) |
| 843 | den += rats[k].den_step - r; |
| 844 | } |
| 845 | diff = q * den - num; |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 846 | if (diff < 0) |
| 847 | diff = -diff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | if (best_num == 0 || |
| 849 | diff * best_den < best_diff * den) { |
| 850 | best_diff = diff; |
| 851 | best_den = den; |
| 852 | best_num = num; |
| 853 | } |
| 854 | } |
| 855 | if (best_den == 0) { |
| 856 | i->empty = 1; |
| 857 | return -EINVAL; |
| 858 | } |
| 859 | t.max = div_up(best_num, best_den); |
| 860 | t.openmax = !!(best_num % best_den); |
| 861 | t.integer = 0; |
| 862 | err = snd_interval_refine(i, &t); |
| 863 | if (err < 0) |
| 864 | return err; |
| 865 | |
| 866 | if (snd_interval_single(i)) { |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 867 | if (best_diff * result_den < result_diff * best_den) { |
| 868 | result_num = best_num; |
| 869 | result_den = best_den; |
| 870 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | if (nump) |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 872 | *nump = result_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | if (denp) |
Krzysztof Helt | 8374e24 | 2009-12-21 17:07:08 +0100 | [diff] [blame] | 874 | *denp = result_den; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | } |
| 876 | return err; |
| 877 | } |
| 878 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 879 | EXPORT_SYMBOL(snd_interval_ratnum); |
| 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | /** |
| 882 | * snd_interval_ratden - refine the interval value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 883 | * @i: interval to refine |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 884 | * @rats_count: number of struct ratden |
| 885 | * @rats: struct ratden array |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 886 | * @nump: pointer to store the resultant numerator |
| 887 | * @denp: pointer to store the resultant denominator |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 889 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 890 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 892 | static int snd_interval_ratden(struct snd_interval *i, |
| 893 | unsigned int rats_count, struct snd_ratden *rats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | unsigned int *nump, unsigned int *denp) |
| 895 | { |
| 896 | unsigned int best_num, best_diff, best_den; |
| 897 | unsigned int k; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 898 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | int err; |
| 900 | |
| 901 | best_num = best_den = best_diff = 0; |
| 902 | for (k = 0; k < rats_count; ++k) { |
| 903 | unsigned int num; |
| 904 | unsigned int den = rats[k].den; |
| 905 | unsigned int q = i->min; |
| 906 | int diff; |
| 907 | num = mul(q, den); |
| 908 | if (num > rats[k].num_max) |
| 909 | continue; |
| 910 | if (num < rats[k].num_min) |
| 911 | num = rats[k].num_max; |
| 912 | else { |
| 913 | unsigned int r; |
| 914 | r = (num - rats[k].num_min) % rats[k].num_step; |
| 915 | if (r != 0) |
| 916 | num += rats[k].num_step - r; |
| 917 | } |
| 918 | diff = num - q * den; |
| 919 | if (best_num == 0 || |
| 920 | diff * best_den < best_diff * den) { |
| 921 | best_diff = diff; |
| 922 | best_den = den; |
| 923 | best_num = num; |
| 924 | } |
| 925 | } |
| 926 | if (best_den == 0) { |
| 927 | i->empty = 1; |
| 928 | return -EINVAL; |
| 929 | } |
| 930 | t.min = div_down(best_num, best_den); |
| 931 | t.openmin = !!(best_num % best_den); |
| 932 | |
| 933 | best_num = best_den = best_diff = 0; |
| 934 | for (k = 0; k < rats_count; ++k) { |
| 935 | unsigned int num; |
| 936 | unsigned int den = rats[k].den; |
| 937 | unsigned int q = i->max; |
| 938 | int diff; |
| 939 | num = mul(q, den); |
| 940 | if (num < rats[k].num_min) |
| 941 | continue; |
| 942 | if (num > rats[k].num_max) |
| 943 | num = rats[k].num_max; |
| 944 | else { |
| 945 | unsigned int r; |
| 946 | r = (num - rats[k].num_min) % rats[k].num_step; |
| 947 | if (r != 0) |
| 948 | num -= r; |
| 949 | } |
| 950 | diff = q * den - num; |
| 951 | if (best_num == 0 || |
| 952 | diff * best_den < best_diff * den) { |
| 953 | best_diff = diff; |
| 954 | best_den = den; |
| 955 | best_num = num; |
| 956 | } |
| 957 | } |
| 958 | if (best_den == 0) { |
| 959 | i->empty = 1; |
| 960 | return -EINVAL; |
| 961 | } |
| 962 | t.max = div_up(best_num, best_den); |
| 963 | t.openmax = !!(best_num % best_den); |
| 964 | t.integer = 0; |
| 965 | err = snd_interval_refine(i, &t); |
| 966 | if (err < 0) |
| 967 | return err; |
| 968 | |
| 969 | if (snd_interval_single(i)) { |
| 970 | if (nump) |
| 971 | *nump = best_num; |
| 972 | if (denp) |
| 973 | *denp = best_den; |
| 974 | } |
| 975 | return err; |
| 976 | } |
| 977 | |
| 978 | /** |
| 979 | * snd_interval_list - refine the interval value from the list |
| 980 | * @i: the interval value to refine |
| 981 | * @count: the number of elements in the list |
| 982 | * @list: the value list |
| 983 | * @mask: the bit-mask to evaluate |
| 984 | * |
| 985 | * Refines the interval value from the list. |
| 986 | * When mask is non-zero, only the elements corresponding to bit 1 are |
| 987 | * evaluated. |
| 988 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 989 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 990 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | */ |
Mark Brown | 4af87a9 | 2012-03-14 19:48:43 +0000 | [diff] [blame] | 992 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
| 993 | const unsigned int *list, unsigned int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | { |
| 995 | unsigned int k; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 996 | struct snd_interval list_range; |
Takashi Iwai | 0981a26 | 2007-02-01 14:53:49 +0100 | [diff] [blame] | 997 | |
| 998 | if (!count) { |
| 999 | i->empty = 1; |
| 1000 | return -EINVAL; |
| 1001 | } |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1002 | snd_interval_any(&list_range); |
| 1003 | list_range.min = UINT_MAX; |
| 1004 | list_range.max = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | for (k = 0; k < count; k++) { |
| 1006 | if (mask && !(mask & (1 << k))) |
| 1007 | continue; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1008 | if (!snd_interval_test(i, list[k])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | continue; |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1010 | list_range.min = min(list_range.min, list[k]); |
| 1011 | list_range.max = max(list_range.max, list[k]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | } |
Clemens Ladisch | b1ddaf6 | 2009-08-25 08:15:41 +0200 | [diff] [blame] | 1013 | return snd_interval_refine(i, &list_range); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | } |
| 1015 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1016 | EXPORT_SYMBOL(snd_interval_list); |
| 1017 | |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1018 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | { |
| 1020 | unsigned int n; |
| 1021 | int changed = 0; |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1022 | n = i->min % step; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | if (n != 0 || i->openmin) { |
| 1024 | i->min += step - n; |
Clemens Ladisch | df1e471 | 2014-09-07 21:43:41 +0200 | [diff] [blame] | 1025 | i->openmin = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | changed = 1; |
| 1027 | } |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1028 | n = i->max % step; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | if (n != 0 || i->openmax) { |
| 1030 | i->max -= n; |
Clemens Ladisch | df1e471 | 2014-09-07 21:43:41 +0200 | [diff] [blame] | 1031 | i->openmax = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | changed = 1; |
| 1033 | } |
| 1034 | if (snd_interval_checkempty(i)) { |
| 1035 | i->empty = 1; |
| 1036 | return -EINVAL; |
| 1037 | } |
| 1038 | return changed; |
| 1039 | } |
| 1040 | |
| 1041 | /* Info constraints helpers */ |
| 1042 | |
| 1043 | /** |
| 1044 | * snd_pcm_hw_rule_add - add the hw-constraint rule |
| 1045 | * @runtime: the pcm runtime instance |
| 1046 | * @cond: condition bits |
| 1047 | * @var: the variable to evaluate |
| 1048 | * @func: the evaluation function |
| 1049 | * @private: the private data pointer passed to function |
| 1050 | * @dep: the dependent variables |
| 1051 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1052 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1054 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | int var, |
| 1056 | snd_pcm_hw_rule_func_t func, void *private, |
| 1057 | int dep, ...) |
| 1058 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1059 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1060 | struct snd_pcm_hw_rule *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | unsigned int k; |
| 1062 | va_list args; |
| 1063 | va_start(args, dep); |
| 1064 | if (constrs->rules_num >= constrs->rules_all) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1065 | struct snd_pcm_hw_rule *new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | unsigned int new_rules = constrs->rules_all + 16; |
| 1067 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1068 | if (!new) { |
| 1069 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | return -ENOMEM; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1071 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | if (constrs->rules) { |
| 1073 | memcpy(new, constrs->rules, |
| 1074 | constrs->rules_num * sizeof(*c)); |
| 1075 | kfree(constrs->rules); |
| 1076 | } |
| 1077 | constrs->rules = new; |
| 1078 | constrs->rules_all = new_rules; |
| 1079 | } |
| 1080 | c = &constrs->rules[constrs->rules_num]; |
| 1081 | c->cond = cond; |
| 1082 | c->func = func; |
| 1083 | c->var = var; |
| 1084 | c->private = private; |
| 1085 | k = 0; |
| 1086 | while (1) { |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1087 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
| 1088 | va_end(args); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1089 | return -EINVAL; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1090 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | c->deps[k++] = dep; |
| 1092 | if (dep < 0) |
| 1093 | break; |
| 1094 | dep = va_arg(args, int); |
| 1095 | } |
| 1096 | constrs->rules_num++; |
| 1097 | va_end(args); |
| 1098 | return 0; |
Jesper Juhl | 87a1c8a | 2010-12-21 00:03:17 +0100 | [diff] [blame] | 1099 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1101 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
| 1102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1104 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1105 | * @runtime: PCM runtime instance |
| 1106 | * @var: hw_params variable to apply the mask |
| 1107 | * @mask: the bitmap mask |
| 1108 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1109 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1110 | * |
| 1111 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1113 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | u_int32_t mask) |
| 1115 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1116 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1117 | struct snd_mask *maskp = constrs_mask(constrs, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | *maskp->bits &= mask; |
| 1119 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ |
| 1120 | if (*maskp->bits == 0) |
| 1121 | return -EINVAL; |
| 1122 | return 0; |
| 1123 | } |
| 1124 | |
| 1125 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1126 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1127 | * @runtime: PCM runtime instance |
| 1128 | * @var: hw_params variable to apply the mask |
| 1129 | * @mask: the 64bit bitmap mask |
| 1130 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1131 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1132 | * |
| 1133 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1135 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | u_int64_t mask) |
| 1137 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1138 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1139 | struct snd_mask *maskp = constrs_mask(constrs, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | maskp->bits[0] &= (u_int32_t)mask; |
| 1141 | maskp->bits[1] &= (u_int32_t)(mask >> 32); |
| 1142 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ |
| 1143 | if (! maskp->bits[0] && ! maskp->bits[1]) |
| 1144 | return -EINVAL; |
| 1145 | return 0; |
| 1146 | } |
Mark Brown | 63a5d4c | 2014-02-20 12:13:52 +0900 | [diff] [blame] | 1147 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
| 1149 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1150 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1151 | * @runtime: PCM runtime instance |
| 1152 | * @var: hw_params variable to apply the integer constraint |
| 1153 | * |
| 1154 | * Apply the constraint of integer to an interval parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1155 | * |
| 1156 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1157 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1159 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1161 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
| 1163 | } |
| 1164 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1165 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
| 1166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1168 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1169 | * @runtime: PCM runtime instance |
| 1170 | * @var: hw_params variable to apply the range |
| 1171 | * @min: the minimal value |
| 1172 | * @max: the maximal value |
| 1173 | * |
| 1174 | * Apply the min/max range constraint to an interval parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1175 | * |
| 1176 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1177 | * negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1179 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | unsigned int min, unsigned int max) |
| 1181 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1182 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
| 1183 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | t.min = min; |
| 1185 | t.max = max; |
| 1186 | t.openmin = t.openmax = 0; |
| 1187 | t.integer = 0; |
| 1188 | return snd_interval_refine(constrs_interval(constrs, var), &t); |
| 1189 | } |
| 1190 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1191 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
| 1192 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1193 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
| 1194 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1196 | struct snd_pcm_hw_constraint_list *list = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
| 1198 | } |
| 1199 | |
| 1200 | |
| 1201 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1202 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1203 | * @runtime: PCM runtime instance |
| 1204 | * @cond: condition bits |
| 1205 | * @var: hw_params variable to apply the list constraint |
| 1206 | * @l: list |
| 1207 | * |
| 1208 | * Apply the list of constraints to an interval parameter. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1209 | * |
| 1210 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1212 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | unsigned int cond, |
| 1214 | snd_pcm_hw_param_t var, |
Mark Brown | 1464189 | 2012-07-05 12:15:01 +0100 | [diff] [blame] | 1215 | const struct snd_pcm_hw_constraint_list *l) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | { |
| 1217 | return snd_pcm_hw_rule_add(runtime, cond, var, |
Mark Brown | 1464189 | 2012-07-05 12:15:01 +0100 | [diff] [blame] | 1218 | snd_pcm_hw_rule_list, (void *)l, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | var, -1); |
| 1220 | } |
| 1221 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1222 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
| 1223 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1224 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
| 1225 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1227 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | unsigned int num = 0, den = 0; |
| 1229 | int err; |
| 1230 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), |
| 1231 | r->nrats, r->rats, &num, &den); |
| 1232 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { |
| 1233 | params->rate_num = num; |
| 1234 | params->rate_den = den; |
| 1235 | } |
| 1236 | return err; |
| 1237 | } |
| 1238 | |
| 1239 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1240 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1241 | * @runtime: PCM runtime instance |
| 1242 | * @cond: condition bits |
| 1243 | * @var: hw_params variable to apply the ratnums constraint |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1244 | * @r: struct snd_ratnums constriants |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1245 | * |
| 1246 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1248 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | unsigned int cond, |
| 1250 | snd_pcm_hw_param_t var, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1251 | struct snd_pcm_hw_constraint_ratnums *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | { |
| 1253 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1254 | snd_pcm_hw_rule_ratnums, r, |
| 1255 | var, -1); |
| 1256 | } |
| 1257 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1258 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
| 1259 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1260 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
| 1261 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1263 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | unsigned int num = 0, den = 0; |
| 1265 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), |
| 1266 | r->nrats, r->rats, &num, &den); |
| 1267 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { |
| 1268 | params->rate_num = num; |
| 1269 | params->rate_den = den; |
| 1270 | } |
| 1271 | return err; |
| 1272 | } |
| 1273 | |
| 1274 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1275 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1276 | * @runtime: PCM runtime instance |
| 1277 | * @cond: condition bits |
| 1278 | * @var: hw_params variable to apply the ratdens constraint |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1279 | * @r: struct snd_ratdens constriants |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1280 | * |
| 1281 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1283 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | unsigned int cond, |
| 1285 | snd_pcm_hw_param_t var, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1286 | struct snd_pcm_hw_constraint_ratdens *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | { |
| 1288 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1289 | snd_pcm_hw_rule_ratdens, r, |
| 1290 | var, -1); |
| 1291 | } |
| 1292 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1293 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
| 1294 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1295 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
| 1296 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | { |
| 1298 | unsigned int l = (unsigned long) rule->private; |
| 1299 | int width = l & 0xffff; |
| 1300 | unsigned int msbits = l >> 16; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1301 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
| 1303 | params->msbits = msbits; |
| 1304 | return 0; |
| 1305 | } |
| 1306 | |
| 1307 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1308 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1309 | * @runtime: PCM runtime instance |
| 1310 | * @cond: condition bits |
| 1311 | * @width: sample bits width |
| 1312 | * @msbits: msbits width |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1313 | * |
| 1314 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1316 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | unsigned int cond, |
| 1318 | unsigned int width, |
| 1319 | unsigned int msbits) |
| 1320 | { |
| 1321 | unsigned long l = (msbits << 16) | width; |
| 1322 | return snd_pcm_hw_rule_add(runtime, cond, -1, |
| 1323 | snd_pcm_hw_rule_msbits, |
| 1324 | (void*) l, |
| 1325 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| 1326 | } |
| 1327 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1328 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
| 1329 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1330 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
| 1331 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | { |
| 1333 | unsigned long step = (unsigned long) rule->private; |
Clemens Ladisch | 0f519b6 | 2014-09-07 21:43:07 +0200 | [diff] [blame] | 1334 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | } |
| 1336 | |
| 1337 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1338 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1339 | * @runtime: PCM runtime instance |
| 1340 | * @cond: condition bits |
| 1341 | * @var: hw_params variable to apply the step constraint |
| 1342 | * @step: step size |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1343 | * |
| 1344 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1346 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | unsigned int cond, |
| 1348 | snd_pcm_hw_param_t var, |
| 1349 | unsigned long step) |
| 1350 | { |
| 1351 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1352 | snd_pcm_hw_rule_step, (void *) step, |
| 1353 | var, -1); |
| 1354 | } |
| 1355 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1356 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
| 1357 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1358 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | { |
Marcin Åšlusarz | 67c3931 | 2007-12-14 12:53:21 +0100 | [diff] [blame] | 1360 | static unsigned int pow2_sizes[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
| 1362 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, |
| 1363 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, |
| 1364 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 |
| 1365 | }; |
| 1366 | return snd_interval_list(hw_param_interval(params, rule->var), |
| 1367 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); |
| 1368 | } |
| 1369 | |
| 1370 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1371 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1372 | * @runtime: PCM runtime instance |
| 1373 | * @cond: condition bits |
| 1374 | * @var: hw_params variable to apply the power-of-2 constraint |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1375 | * |
| 1376 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1378 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | unsigned int cond, |
| 1380 | snd_pcm_hw_param_t var) |
| 1381 | { |
| 1382 | return snd_pcm_hw_rule_add(runtime, cond, var, |
| 1383 | snd_pcm_hw_rule_pow2, NULL, |
| 1384 | var, -1); |
| 1385 | } |
| 1386 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1387 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
| 1388 | |
Clemens Ladisch | d5b702a | 2011-09-16 23:03:02 +0200 | [diff] [blame] | 1389 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
| 1390 | struct snd_pcm_hw_rule *rule) |
| 1391 | { |
| 1392 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; |
| 1393 | struct snd_interval *rate; |
| 1394 | |
| 1395 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| 1396 | return snd_interval_list(rate, 1, &base_rate, 0); |
| 1397 | } |
| 1398 | |
| 1399 | /** |
| 1400 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling |
| 1401 | * @runtime: PCM runtime instance |
| 1402 | * @base_rate: the rate at which the hardware does not resample |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1403 | * |
| 1404 | * Return: Zero if successful, or a negative error code on failure. |
Clemens Ladisch | d5b702a | 2011-09-16 23:03:02 +0200 | [diff] [blame] | 1405 | */ |
| 1406 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
| 1407 | unsigned int base_rate) |
| 1408 | { |
| 1409 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, |
| 1410 | SNDRV_PCM_HW_PARAM_RATE, |
| 1411 | snd_pcm_hw_rule_noresample_func, |
| 1412 | (void *)(uintptr_t)base_rate, |
| 1413 | SNDRV_PCM_HW_PARAM_RATE, -1); |
| 1414 | } |
| 1415 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); |
| 1416 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1417 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 1418 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | { |
| 1420 | if (hw_is_mask(var)) { |
| 1421 | snd_mask_any(hw_param_mask(params, var)); |
| 1422 | params->cmask |= 1 << var; |
| 1423 | params->rmask |= 1 << var; |
| 1424 | return; |
| 1425 | } |
| 1426 | if (hw_is_interval(var)) { |
| 1427 | snd_interval_any(hw_param_interval(params, var)); |
| 1428 | params->cmask |= 1 << var; |
| 1429 | params->rmask |= 1 << var; |
| 1430 | return; |
| 1431 | } |
| 1432 | snd_BUG(); |
| 1433 | } |
| 1434 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1435 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | { |
| 1437 | unsigned int k; |
| 1438 | memset(params, 0, sizeof(*params)); |
| 1439 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) |
| 1440 | _snd_pcm_hw_param_any(params, k); |
| 1441 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) |
| 1442 | _snd_pcm_hw_param_any(params, k); |
| 1443 | params->info = ~0U; |
| 1444 | } |
| 1445 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1446 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | |
| 1448 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1449 | * snd_pcm_hw_param_value - return @params field @var value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1450 | * @params: the hw_params instance |
| 1451 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1452 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1454 | * Return: The value for field @var if it's fixed in configuration space |
| 1455 | * defined by @params. -%EINVAL otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1457 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
| 1458 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | { |
| 1460 | if (hw_is_mask(var)) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1461 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | if (!snd_mask_single(mask)) |
| 1463 | return -EINVAL; |
| 1464 | if (dir) |
| 1465 | *dir = 0; |
| 1466 | return snd_mask_value(mask); |
| 1467 | } |
| 1468 | if (hw_is_interval(var)) { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1469 | const struct snd_interval *i = hw_param_interval_c(params, var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | if (!snd_interval_single(i)) |
| 1471 | return -EINVAL; |
| 1472 | if (dir) |
| 1473 | *dir = i->openmin; |
| 1474 | return snd_interval_value(i); |
| 1475 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | return -EINVAL; |
| 1477 | } |
| 1478 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1479 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1481 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | snd_pcm_hw_param_t var) |
| 1483 | { |
| 1484 | if (hw_is_mask(var)) { |
| 1485 | snd_mask_none(hw_param_mask(params, var)); |
| 1486 | params->cmask |= 1 << var; |
| 1487 | params->rmask |= 1 << var; |
| 1488 | } else if (hw_is_interval(var)) { |
| 1489 | snd_interval_none(hw_param_interval(params, var)); |
| 1490 | params->cmask |= 1 << var; |
| 1491 | params->rmask |= 1 << var; |
| 1492 | } else { |
| 1493 | snd_BUG(); |
| 1494 | } |
| 1495 | } |
| 1496 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1497 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1499 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 1500 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | { |
| 1502 | int changed; |
| 1503 | if (hw_is_mask(var)) |
| 1504 | changed = snd_mask_refine_first(hw_param_mask(params, var)); |
| 1505 | else if (hw_is_interval(var)) |
| 1506 | changed = snd_interval_refine_first(hw_param_interval(params, var)); |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1507 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | if (changed) { |
| 1510 | params->cmask |= 1 << var; |
| 1511 | params->rmask |= 1 << var; |
| 1512 | } |
| 1513 | return changed; |
| 1514 | } |
| 1515 | |
| 1516 | |
| 1517 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1518 | * snd_pcm_hw_param_first - refine config space and return minimum value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1519 | * @pcm: PCM instance |
| 1520 | * @params: the hw_params instance |
| 1521 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1522 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1524 | * Inside configuration space defined by @params remove from @var all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | * values > minimum. Reduce configuration space accordingly. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1526 | * |
| 1527 | * Return: The minimum, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1529 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
| 1530 | struct snd_pcm_hw_params *params, |
| 1531 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | { |
| 1533 | int changed = _snd_pcm_hw_param_first(params, var); |
| 1534 | if (changed < 0) |
| 1535 | return changed; |
| 1536 | if (params->rmask) { |
| 1537 | int err = snd_pcm_hw_refine(pcm, params); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1538 | if (snd_BUG_ON(err < 0)) |
| 1539 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | } |
| 1541 | return snd_pcm_hw_param_value(params, var, dir); |
| 1542 | } |
| 1543 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1544 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
| 1545 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1546 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 1547 | snd_pcm_hw_param_t var) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | { |
| 1549 | int changed; |
| 1550 | if (hw_is_mask(var)) |
| 1551 | changed = snd_mask_refine_last(hw_param_mask(params, var)); |
| 1552 | else if (hw_is_interval(var)) |
| 1553 | changed = snd_interval_refine_last(hw_param_interval(params, var)); |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1554 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | if (changed) { |
| 1557 | params->cmask |= 1 << var; |
| 1558 | params->rmask |= 1 << var; |
| 1559 | } |
| 1560 | return changed; |
| 1561 | } |
| 1562 | |
| 1563 | |
| 1564 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1565 | * snd_pcm_hw_param_last - refine config space and return maximum value |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1566 | * @pcm: PCM instance |
| 1567 | * @params: the hw_params instance |
| 1568 | * @var: parameter to retrieve |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1569 | * @dir: pointer to the direction (-1,0,1) or %NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1571 | * Inside configuration space defined by @params remove from @var all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | * values < maximum. Reduce configuration space accordingly. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1573 | * |
| 1574 | * Return: The maximum, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | */ |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1576 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
| 1577 | struct snd_pcm_hw_params *params, |
| 1578 | snd_pcm_hw_param_t var, int *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | { |
| 1580 | int changed = _snd_pcm_hw_param_last(params, var); |
| 1581 | if (changed < 0) |
| 1582 | return changed; |
| 1583 | if (params->rmask) { |
| 1584 | int err = snd_pcm_hw_refine(pcm, params); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1585 | if (snd_BUG_ON(err < 0)) |
| 1586 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | } |
| 1588 | return snd_pcm_hw_param_value(params, var, dir); |
| 1589 | } |
| 1590 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1591 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | |
| 1593 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1594 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1595 | * @pcm: PCM instance |
| 1596 | * @params: the hw_params instance |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1598 | * Choose one configuration from configuration space defined by @params. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | * The configuration chosen is that obtained fixing in this order: |
| 1600 | * first access, first format, first subformat, min channels, |
| 1601 | * min rate, min period time, max buffer size, min tick time |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1602 | * |
| 1603 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | */ |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1605 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
| 1606 | struct snd_pcm_hw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | { |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1608 | static int vars[] = { |
| 1609 | SNDRV_PCM_HW_PARAM_ACCESS, |
| 1610 | SNDRV_PCM_HW_PARAM_FORMAT, |
| 1611 | SNDRV_PCM_HW_PARAM_SUBFORMAT, |
| 1612 | SNDRV_PCM_HW_PARAM_CHANNELS, |
| 1613 | SNDRV_PCM_HW_PARAM_RATE, |
| 1614 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, |
| 1615 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| 1616 | SNDRV_PCM_HW_PARAM_TICK_TIME, |
| 1617 | -1 |
| 1618 | }; |
| 1619 | int err, *v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1621 | for (v = vars; *v != -1; v++) { |
| 1622 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) |
| 1623 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); |
| 1624 | else |
| 1625 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1626 | if (snd_BUG_ON(err < 0)) |
| 1627 | return err; |
Takashi Iwai | 2f4ca8e | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1628 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | return 0; |
| 1630 | } |
| 1631 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1632 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | void *arg) |
| 1634 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1635 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | unsigned long flags; |
| 1637 | snd_pcm_stream_lock_irqsave(substream, flags); |
| 1638 | if (snd_pcm_running(substream) && |
| 1639 | snd_pcm_update_hw_ptr(substream) >= 0) |
| 1640 | runtime->status->hw_ptr %= runtime->buffer_size; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 1641 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | runtime->status->hw_ptr = 0; |
Pierre-Louis Bossart | 0e8014d | 2012-10-22 16:42:14 -0500 | [diff] [blame] | 1643 | runtime->hw_ptr_wrap = 0; |
| 1644 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
| 1646 | return 0; |
| 1647 | } |
| 1648 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1649 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | void *arg) |
| 1651 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1652 | struct snd_pcm_channel_info *info = arg; |
| 1653 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | int width; |
| 1655 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { |
| 1656 | info->offset = -1; |
| 1657 | return 0; |
| 1658 | } |
| 1659 | width = snd_pcm_format_physical_width(runtime->format); |
| 1660 | if (width < 0) |
| 1661 | return width; |
| 1662 | info->offset = 0; |
| 1663 | switch (runtime->access) { |
| 1664 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: |
| 1665 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: |
| 1666 | info->first = info->channel * width; |
| 1667 | info->step = runtime->channels * width; |
| 1668 | break; |
| 1669 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: |
| 1670 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: |
| 1671 | { |
| 1672 | size_t size = runtime->dma_bytes / runtime->channels; |
| 1673 | info->first = info->channel * size * 8; |
| 1674 | info->step = width; |
| 1675 | break; |
| 1676 | } |
| 1677 | default: |
| 1678 | snd_BUG(); |
| 1679 | break; |
| 1680 | } |
| 1681 | return 0; |
| 1682 | } |
| 1683 | |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1684 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
| 1685 | void *arg) |
| 1686 | { |
| 1687 | struct snd_pcm_hw_params *params = arg; |
| 1688 | snd_pcm_format_t format; |
Clemens Ladisch | a9960e6 | 2014-09-21 22:50:57 +0200 | [diff] [blame] | 1689 | int channels; |
| 1690 | ssize_t frame_size; |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1691 | |
| 1692 | params->fifo_size = substream->runtime->hw.fifo_size; |
| 1693 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { |
| 1694 | format = params_format(params); |
| 1695 | channels = params_channels(params); |
Clemens Ladisch | a9960e6 | 2014-09-21 22:50:57 +0200 | [diff] [blame] | 1696 | frame_size = snd_pcm_format_size(format, channels); |
| 1697 | if (frame_size > 0) |
| 1698 | params->fifo_size /= (unsigned)frame_size; |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1699 | } |
| 1700 | return 0; |
| 1701 | } |
| 1702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | /** |
| 1704 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback |
| 1705 | * @substream: the pcm substream instance |
| 1706 | * @cmd: ioctl command |
| 1707 | * @arg: ioctl argument |
| 1708 | * |
| 1709 | * Processes the generic ioctl commands for PCM. |
| 1710 | * Can be passed as the ioctl callback for PCM ops. |
| 1711 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1712 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1714 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | unsigned int cmd, void *arg) |
| 1716 | { |
| 1717 | switch (cmd) { |
| 1718 | case SNDRV_PCM_IOCTL1_INFO: |
| 1719 | return 0; |
| 1720 | case SNDRV_PCM_IOCTL1_RESET: |
| 1721 | return snd_pcm_lib_ioctl_reset(substream, arg); |
| 1722 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: |
| 1723 | return snd_pcm_lib_ioctl_channel_info(substream, arg); |
Jaroslav Kysela | 8bea869 | 2009-04-27 09:44:40 +0200 | [diff] [blame] | 1724 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
| 1725 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | } |
| 1727 | return -ENXIO; |
| 1728 | } |
| 1729 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1730 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
| 1731 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | /** |
| 1733 | * snd_pcm_period_elapsed - update the pcm status for the next period |
| 1734 | * @substream: the pcm substream instance |
| 1735 | * |
| 1736 | * This function is called from the interrupt handler when the |
| 1737 | * PCM has processed the period size. It will update the current |
Takashi Iwai | 31e8960 | 2008-01-08 18:09:57 +0100 | [diff] [blame] | 1738 | * pointer, wake up sleepers, etc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | * |
| 1740 | * Even if more than one periods have elapsed since the last call, you |
| 1741 | * have to call this only once. |
| 1742 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1743 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1745 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | unsigned long flags; |
| 1747 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1748 | if (PCM_RUNTIME_CHECK(substream)) |
| 1749 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | |
| 1752 | if (runtime->transfer_ack_begin) |
| 1753 | runtime->transfer_ack_begin(substream); |
| 1754 | |
| 1755 | snd_pcm_stream_lock_irqsave(substream, flags); |
| 1756 | if (!snd_pcm_running(substream) || |
Jaroslav Kysela | f240406 | 2010-01-05 17:19:34 +0100 | [diff] [blame] | 1757 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | goto _end; |
| 1759 | |
| 1760 | if (substream->timer_running) |
| 1761 | snd_timer_interrupt(substream->timer, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | _end: |
| 1763 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
| 1764 | if (runtime->transfer_ack_end) |
| 1765 | runtime->transfer_ack_end(substream); |
| 1766 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); |
| 1767 | } |
| 1768 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1769 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
| 1770 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1771 | /* |
| 1772 | * Wait until avail_min data becomes available |
| 1773 | * Returns a negative error code if any error occurs during operation. |
| 1774 | * The available space is stored on availp. When err = 0 and avail = 0 |
| 1775 | * on the capture stream, it indicates the stream is in DRAINING state. |
| 1776 | */ |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 1777 | static int wait_for_avail(struct snd_pcm_substream *substream, |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1778 | snd_pcm_uframes_t *availp) |
| 1779 | { |
| 1780 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 1781 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| 1782 | wait_queue_t wait; |
| 1783 | int err = 0; |
| 1784 | snd_pcm_uframes_t avail = 0; |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 1785 | long wait_time, tout; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1786 | |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1787 | init_waitqueue_entry(&wait, current); |
| 1788 | set_current_state(TASK_INTERRUPTIBLE); |
| 1789 | add_wait_queue(&runtime->tsleep, &wait); |
| 1790 | |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 1791 | if (runtime->no_period_wakeup) |
| 1792 | wait_time = MAX_SCHEDULE_TIMEOUT; |
| 1793 | else { |
| 1794 | wait_time = 10; |
| 1795 | if (runtime->rate) { |
| 1796 | long t = runtime->period_size * 2 / runtime->rate; |
| 1797 | wait_time = max(t, wait_time); |
| 1798 | } |
| 1799 | wait_time = msecs_to_jiffies(wait_time * 1000); |
| 1800 | } |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1801 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1802 | for (;;) { |
| 1803 | if (signal_pending(current)) { |
| 1804 | err = -ERESTARTSYS; |
| 1805 | break; |
| 1806 | } |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1807 | |
| 1808 | /* |
| 1809 | * We need to check if space became available already |
| 1810 | * (and thus the wakeup happened already) first to close |
| 1811 | * the race of space already having become available. |
| 1812 | * This check must happen after been added to the waitqueue |
| 1813 | * and having current state be INTERRUPTIBLE. |
| 1814 | */ |
| 1815 | if (is_playback) |
| 1816 | avail = snd_pcm_playback_avail(runtime); |
| 1817 | else |
| 1818 | avail = snd_pcm_capture_avail(runtime); |
| 1819 | if (avail >= runtime->twake) |
| 1820 | break; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1821 | snd_pcm_stream_unlock_irq(substream); |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1822 | |
| 1823 | tout = schedule_timeout(wait_time); |
| 1824 | |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1825 | snd_pcm_stream_lock_irq(substream); |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1826 | set_current_state(TASK_INTERRUPTIBLE); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1827 | switch (runtime->status->state) { |
| 1828 | case SNDRV_PCM_STATE_SUSPENDED: |
| 1829 | err = -ESTRPIPE; |
| 1830 | goto _endloop; |
| 1831 | case SNDRV_PCM_STATE_XRUN: |
| 1832 | err = -EPIPE; |
| 1833 | goto _endloop; |
| 1834 | case SNDRV_PCM_STATE_DRAINING: |
| 1835 | if (is_playback) |
| 1836 | err = -EPIPE; |
| 1837 | else |
| 1838 | avail = 0; /* indicate draining */ |
| 1839 | goto _endloop; |
| 1840 | case SNDRV_PCM_STATE_OPEN: |
| 1841 | case SNDRV_PCM_STATE_SETUP: |
| 1842 | case SNDRV_PCM_STATE_DISCONNECTED: |
| 1843 | err = -EBADFD; |
| 1844 | goto _endloop; |
JongHo Kim | ed697e1 | 2013-12-17 23:02:24 +0900 | [diff] [blame] | 1845 | case SNDRV_PCM_STATE_PAUSED: |
| 1846 | continue; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1847 | } |
| 1848 | if (!tout) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 1849 | pcm_dbg(substream->pcm, |
| 1850 | "%s write error (DMA or IRQ trouble?)\n", |
| 1851 | is_playback ? "playback" : "capture"); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1852 | err = -EIO; |
| 1853 | break; |
| 1854 | } |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1855 | } |
| 1856 | _endloop: |
Arjan van de Ven | 763437a | 2011-09-15 08:49:25 +0200 | [diff] [blame] | 1857 | set_current_state(TASK_RUNNING); |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 1858 | remove_wait_queue(&runtime->tsleep, &wait); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1859 | *availp = avail; |
| 1860 | return err; |
| 1861 | } |
| 1862 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1863 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | unsigned int hwoff, |
| 1865 | unsigned long data, unsigned int off, |
| 1866 | snd_pcm_uframes_t frames) |
| 1867 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1868 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | int err; |
| 1870 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); |
| 1871 | if (substream->ops->copy) { |
| 1872 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) |
| 1873 | return err; |
| 1874 | } else { |
| 1875 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
| 1877 | return -EFAULT; |
| 1878 | } |
| 1879 | return 0; |
| 1880 | } |
| 1881 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1882 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | unsigned long data, unsigned int off, |
| 1884 | snd_pcm_uframes_t size); |
| 1885 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1886 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | unsigned long data, |
| 1888 | snd_pcm_uframes_t size, |
| 1889 | int nonblock, |
| 1890 | transfer_f transfer) |
| 1891 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1892 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | snd_pcm_uframes_t xfer = 0; |
| 1894 | snd_pcm_uframes_t offset = 0; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 1895 | snd_pcm_uframes_t avail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | int err = 0; |
| 1897 | |
| 1898 | if (size == 0) |
| 1899 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | |
| 1901 | snd_pcm_stream_lock_irq(substream); |
| 1902 | switch (runtime->status->state) { |
| 1903 | case SNDRV_PCM_STATE_PREPARED: |
| 1904 | case SNDRV_PCM_STATE_RUNNING: |
| 1905 | case SNDRV_PCM_STATE_PAUSED: |
| 1906 | break; |
| 1907 | case SNDRV_PCM_STATE_XRUN: |
| 1908 | err = -EPIPE; |
| 1909 | goto _end_unlock; |
| 1910 | case SNDRV_PCM_STATE_SUSPENDED: |
| 1911 | err = -ESTRPIPE; |
| 1912 | goto _end_unlock; |
| 1913 | default: |
| 1914 | err = -EBADFD; |
| 1915 | goto _end_unlock; |
| 1916 | } |
| 1917 | |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 1918 | runtime->twake = runtime->control->avail_min ? : 1; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 1919 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
| 1920 | snd_pcm_update_hw_ptr(substream); |
| 1921 | avail = snd_pcm_playback_avail(runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | while (size > 0) { |
| 1923 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | snd_pcm_uframes_t cont; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1925 | if (!avail) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | if (nonblock) { |
| 1927 | err = -EAGAIN; |
| 1928 | goto _end_unlock; |
| 1929 | } |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 1930 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
| 1931 | runtime->control->avail_min ? : 1); |
| 1932 | err = wait_for_avail(substream, &avail); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 1933 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | frames = size > avail ? avail : size; |
| 1937 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; |
| 1938 | if (frames > cont) |
| 1939 | frames = cont; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1940 | if (snd_BUG_ON(!frames)) { |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 1941 | runtime->twake = 0; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1942 | snd_pcm_stream_unlock_irq(substream); |
| 1943 | return -EINVAL; |
| 1944 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | appl_ptr = runtime->control->appl_ptr; |
| 1946 | appl_ofs = appl_ptr % runtime->buffer_size; |
| 1947 | snd_pcm_stream_unlock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 1948 | err = transfer(substream, appl_ofs, data, offset, frames); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | snd_pcm_stream_lock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 1950 | if (err < 0) |
| 1951 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | switch (runtime->status->state) { |
| 1953 | case SNDRV_PCM_STATE_XRUN: |
| 1954 | err = -EPIPE; |
| 1955 | goto _end_unlock; |
| 1956 | case SNDRV_PCM_STATE_SUSPENDED: |
| 1957 | err = -ESTRPIPE; |
| 1958 | goto _end_unlock; |
| 1959 | default: |
| 1960 | break; |
| 1961 | } |
| 1962 | appl_ptr += frames; |
| 1963 | if (appl_ptr >= runtime->boundary) |
| 1964 | appl_ptr -= runtime->boundary; |
| 1965 | runtime->control->appl_ptr = appl_ptr; |
| 1966 | if (substream->ops->ack) |
| 1967 | substream->ops->ack(substream); |
| 1968 | |
| 1969 | offset += frames; |
| 1970 | size -= frames; |
| 1971 | xfer += frames; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 1972 | avail -= frames; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && |
| 1974 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { |
| 1975 | err = snd_pcm_start(substream); |
| 1976 | if (err < 0) |
| 1977 | goto _end_unlock; |
| 1978 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | } |
| 1980 | _end_unlock: |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 1981 | runtime->twake = 0; |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 1982 | if (xfer > 0 && err >= 0) |
| 1983 | snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | snd_pcm_stream_unlock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1985 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
| 1986 | } |
| 1987 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 1988 | /* sanity-check for read/write methods */ |
| 1989 | static int pcm_sanity_check(struct snd_pcm_substream *substream) |
| 1990 | { |
| 1991 | struct snd_pcm_runtime *runtime; |
| 1992 | if (PCM_RUNTIME_CHECK(substream)) |
| 1993 | return -ENXIO; |
| 1994 | runtime = substream->runtime; |
| 1995 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
| 1996 | return -EINVAL; |
| 1997 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 1998 | return -EBADFD; |
| 1999 | return 0; |
| 2000 | } |
| 2001 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2002 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2004 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | int nonblock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2006 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2008 | err = pcm_sanity_check(substream); |
| 2009 | if (err < 0) |
| 2010 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | runtime = substream->runtime; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2012 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | |
| 2014 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && |
| 2015 | runtime->channels > 1) |
| 2016 | return -EINVAL; |
| 2017 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, |
| 2018 | snd_pcm_lib_write_transfer); |
| 2019 | } |
| 2020 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 2021 | EXPORT_SYMBOL(snd_pcm_lib_write); |
| 2022 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2023 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | unsigned int hwoff, |
| 2025 | unsigned long data, unsigned int off, |
| 2026 | snd_pcm_uframes_t frames) |
| 2027 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2028 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | int err; |
| 2030 | void __user **bufs = (void __user **)data; |
| 2031 | int channels = runtime->channels; |
| 2032 | int c; |
| 2033 | if (substream->ops->copy) { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2034 | if (snd_BUG_ON(!substream->ops->silence)) |
| 2035 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2037 | if (*bufs == NULL) { |
| 2038 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) |
| 2039 | return err; |
| 2040 | } else { |
| 2041 | char __user *buf = *bufs + samples_to_bytes(runtime, off); |
| 2042 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) |
| 2043 | return err; |
| 2044 | } |
| 2045 | } |
| 2046 | } else { |
| 2047 | /* default transfer behaviour */ |
| 2048 | size_t dma_csize = runtime->dma_bytes / channels; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2050 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); |
| 2051 | if (*bufs == NULL) { |
| 2052 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); |
| 2053 | } else { |
| 2054 | char __user *buf = *bufs + samples_to_bytes(runtime, off); |
| 2055 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) |
| 2056 | return -EFAULT; |
| 2057 | } |
| 2058 | } |
| 2059 | } |
| 2060 | return 0; |
| 2061 | } |
| 2062 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2063 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | void __user **bufs, |
| 2065 | snd_pcm_uframes_t frames) |
| 2066 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2067 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2068 | int nonblock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2069 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2071 | err = pcm_sanity_check(substream); |
| 2072 | if (err < 0) |
| 2073 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | runtime = substream->runtime; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2075 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | |
| 2077 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
| 2078 | return -EINVAL; |
| 2079 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, |
| 2080 | nonblock, snd_pcm_lib_writev_transfer); |
| 2081 | } |
| 2082 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 2083 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
| 2084 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2085 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | unsigned int hwoff, |
| 2087 | unsigned long data, unsigned int off, |
| 2088 | snd_pcm_uframes_t frames) |
| 2089 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2090 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | int err; |
| 2092 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); |
| 2093 | if (substream->ops->copy) { |
| 2094 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) |
| 2095 | return err; |
| 2096 | } else { |
| 2097 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
| 2099 | return -EFAULT; |
| 2100 | } |
| 2101 | return 0; |
| 2102 | } |
| 2103 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2104 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | unsigned long data, |
| 2106 | snd_pcm_uframes_t size, |
| 2107 | int nonblock, |
| 2108 | transfer_f transfer) |
| 2109 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2110 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | snd_pcm_uframes_t xfer = 0; |
| 2112 | snd_pcm_uframes_t offset = 0; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2113 | snd_pcm_uframes_t avail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | int err = 0; |
| 2115 | |
| 2116 | if (size == 0) |
| 2117 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | |
| 2119 | snd_pcm_stream_lock_irq(substream); |
| 2120 | switch (runtime->status->state) { |
| 2121 | case SNDRV_PCM_STATE_PREPARED: |
| 2122 | if (size >= runtime->start_threshold) { |
| 2123 | err = snd_pcm_start(substream); |
| 2124 | if (err < 0) |
| 2125 | goto _end_unlock; |
| 2126 | } |
| 2127 | break; |
| 2128 | case SNDRV_PCM_STATE_DRAINING: |
| 2129 | case SNDRV_PCM_STATE_RUNNING: |
| 2130 | case SNDRV_PCM_STATE_PAUSED: |
| 2131 | break; |
| 2132 | case SNDRV_PCM_STATE_XRUN: |
| 2133 | err = -EPIPE; |
| 2134 | goto _end_unlock; |
| 2135 | case SNDRV_PCM_STATE_SUSPENDED: |
| 2136 | err = -ESTRPIPE; |
| 2137 | goto _end_unlock; |
| 2138 | default: |
| 2139 | err = -EBADFD; |
| 2140 | goto _end_unlock; |
| 2141 | } |
| 2142 | |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 2143 | runtime->twake = runtime->control->avail_min ? : 1; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2144 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
| 2145 | snd_pcm_update_hw_ptr(substream); |
| 2146 | avail = snd_pcm_capture_avail(runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | while (size > 0) { |
| 2148 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | snd_pcm_uframes_t cont; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2150 | if (!avail) { |
| 2151 | if (runtime->status->state == |
| 2152 | SNDRV_PCM_STATE_DRAINING) { |
| 2153 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | goto _end_unlock; |
| 2155 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | if (nonblock) { |
| 2157 | err = -EAGAIN; |
| 2158 | goto _end_unlock; |
| 2159 | } |
David Dillow | 5daeba3 | 2010-06-27 00:13:20 +0200 | [diff] [blame] | 2160 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
| 2161 | runtime->control->avail_min ? : 1); |
| 2162 | err = wait_for_avail(substream, &avail); |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2163 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | goto _end_unlock; |
Takashi Iwai | 1307551 | 2008-01-08 18:08:14 +0100 | [diff] [blame] | 2165 | if (!avail) |
| 2166 | continue; /* draining */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | frames = size > avail ? avail : size; |
| 2169 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; |
| 2170 | if (frames > cont) |
| 2171 | frames = cont; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2172 | if (snd_BUG_ON(!frames)) { |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 2173 | runtime->twake = 0; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2174 | snd_pcm_stream_unlock_irq(substream); |
| 2175 | return -EINVAL; |
| 2176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | appl_ptr = runtime->control->appl_ptr; |
| 2178 | appl_ofs = appl_ptr % runtime->buffer_size; |
| 2179 | snd_pcm_stream_unlock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2180 | err = transfer(substream, appl_ofs, data, offset, frames); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | snd_pcm_stream_lock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2182 | if (err < 0) |
| 2183 | goto _end_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | switch (runtime->status->state) { |
| 2185 | case SNDRV_PCM_STATE_XRUN: |
| 2186 | err = -EPIPE; |
| 2187 | goto _end_unlock; |
| 2188 | case SNDRV_PCM_STATE_SUSPENDED: |
| 2189 | err = -ESTRPIPE; |
| 2190 | goto _end_unlock; |
| 2191 | default: |
| 2192 | break; |
| 2193 | } |
| 2194 | appl_ptr += frames; |
| 2195 | if (appl_ptr >= runtime->boundary) |
| 2196 | appl_ptr -= runtime->boundary; |
| 2197 | runtime->control->appl_ptr = appl_ptr; |
| 2198 | if (substream->ops->ack) |
| 2199 | substream->ops->ack(substream); |
| 2200 | |
| 2201 | offset += frames; |
| 2202 | size -= frames; |
| 2203 | xfer += frames; |
Takashi Iwai | 0910c21 | 2012-05-11 17:50:49 +0200 | [diff] [blame] | 2204 | avail -= frames; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | } |
| 2206 | _end_unlock: |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 2207 | runtime->twake = 0; |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 2208 | if (xfer > 0 && err >= 0) |
| 2209 | snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | snd_pcm_stream_unlock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
| 2212 | } |
| 2213 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2214 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2216 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2217 | int nonblock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2218 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2220 | err = pcm_sanity_check(substream); |
| 2221 | if (err < 0) |
| 2222 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | runtime = substream->runtime; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2224 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
| 2226 | return -EINVAL; |
| 2227 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); |
| 2228 | } |
| 2229 | |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 2230 | EXPORT_SYMBOL(snd_pcm_lib_read); |
| 2231 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2232 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | unsigned int hwoff, |
| 2234 | unsigned long data, unsigned int off, |
| 2235 | snd_pcm_uframes_t frames) |
| 2236 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2237 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | int err; |
| 2239 | void __user **bufs = (void __user **)data; |
| 2240 | int channels = runtime->channels; |
| 2241 | int c; |
| 2242 | if (substream->ops->copy) { |
| 2243 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2244 | char __user *buf; |
| 2245 | if (*bufs == NULL) |
| 2246 | continue; |
| 2247 | buf = *bufs + samples_to_bytes(runtime, off); |
| 2248 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) |
| 2249 | return err; |
| 2250 | } |
| 2251 | } else { |
| 2252 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | for (c = 0; c < channels; ++c, ++bufs) { |
| 2254 | char *hwbuf; |
| 2255 | char __user *buf; |
| 2256 | if (*bufs == NULL) |
| 2257 | continue; |
| 2258 | |
| 2259 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); |
| 2260 | buf = *bufs + samples_to_bytes(runtime, off); |
| 2261 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) |
| 2262 | return -EFAULT; |
| 2263 | } |
| 2264 | } |
| 2265 | return 0; |
| 2266 | } |
| 2267 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2268 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | void __user **bufs, |
| 2270 | snd_pcm_uframes_t frames) |
| 2271 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2272 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | int nonblock; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2274 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2276 | err = pcm_sanity_check(substream); |
| 2277 | if (err < 0) |
| 2278 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2279 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 2281 | return -EBADFD; |
| 2282 | |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2283 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
| 2285 | return -EINVAL; |
| 2286 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); |
| 2287 | } |
| 2288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | EXPORT_SYMBOL(snd_pcm_lib_readv); |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2290 | |
| 2291 | /* |
| 2292 | * standard channel mapping helpers |
| 2293 | */ |
| 2294 | |
| 2295 | /* default channel maps for multi-channel playbacks, up to 8 channels */ |
| 2296 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { |
| 2297 | { .channels = 1, |
Takashi Iwai | 5efbc26 | 2012-09-13 14:48:46 +0200 | [diff] [blame] | 2298 | .map = { SNDRV_CHMAP_MONO } }, |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2299 | { .channels = 2, |
| 2300 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, |
| 2301 | { .channels = 4, |
| 2302 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2303 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2304 | { .channels = 6, |
| 2305 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2306 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2307 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, |
| 2308 | { .channels = 8, |
| 2309 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2310 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2311 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2312 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, |
| 2313 | { } |
| 2314 | }; |
| 2315 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); |
| 2316 | |
| 2317 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ |
| 2318 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { |
| 2319 | { .channels = 1, |
Takashi Iwai | 5efbc26 | 2012-09-13 14:48:46 +0200 | [diff] [blame] | 2320 | .map = { SNDRV_CHMAP_MONO } }, |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2321 | { .channels = 2, |
| 2322 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, |
| 2323 | { .channels = 4, |
| 2324 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2325 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2326 | { .channels = 6, |
| 2327 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2328 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2329 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
| 2330 | { .channels = 8, |
| 2331 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, |
| 2332 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, |
| 2333 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, |
| 2334 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, |
| 2335 | { } |
| 2336 | }; |
| 2337 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); |
| 2338 | |
| 2339 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) |
| 2340 | { |
| 2341 | if (ch > info->max_channels) |
| 2342 | return false; |
| 2343 | return !info->channel_mask || (info->channel_mask & (1U << ch)); |
| 2344 | } |
| 2345 | |
| 2346 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, |
| 2347 | struct snd_ctl_elem_info *uinfo) |
| 2348 | { |
| 2349 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2350 | |
| 2351 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 2352 | uinfo->count = 0; |
| 2353 | uinfo->count = info->max_channels; |
| 2354 | uinfo->value.integer.min = 0; |
| 2355 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; |
| 2356 | return 0; |
| 2357 | } |
| 2358 | |
| 2359 | /* get callback for channel map ctl element |
| 2360 | * stores the channel position firstly matching with the current channels |
| 2361 | */ |
| 2362 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, |
| 2363 | struct snd_ctl_elem_value *ucontrol) |
| 2364 | { |
| 2365 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2366 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); |
| 2367 | struct snd_pcm_substream *substream; |
| 2368 | const struct snd_pcm_chmap_elem *map; |
| 2369 | |
| 2370 | if (snd_BUG_ON(!info->chmap)) |
| 2371 | return -EINVAL; |
| 2372 | substream = snd_pcm_chmap_substream(info, idx); |
| 2373 | if (!substream) |
| 2374 | return -ENODEV; |
| 2375 | memset(ucontrol->value.integer.value, 0, |
| 2376 | sizeof(ucontrol->value.integer.value)); |
| 2377 | if (!substream->runtime) |
| 2378 | return 0; /* no channels set */ |
| 2379 | for (map = info->chmap; map->channels; map++) { |
| 2380 | int i; |
| 2381 | if (map->channels == substream->runtime->channels && |
| 2382 | valid_chmap_channels(info, map->channels)) { |
| 2383 | for (i = 0; i < map->channels; i++) |
| 2384 | ucontrol->value.integer.value[i] = map->map[i]; |
| 2385 | return 0; |
| 2386 | } |
| 2387 | } |
| 2388 | return -EINVAL; |
| 2389 | } |
| 2390 | |
| 2391 | /* tlv callback for channel map ctl element |
| 2392 | * expands the pre-defined channel maps in a form of TLV |
| 2393 | */ |
| 2394 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, |
| 2395 | unsigned int size, unsigned int __user *tlv) |
| 2396 | { |
| 2397 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2398 | const struct snd_pcm_chmap_elem *map; |
| 2399 | unsigned int __user *dst; |
| 2400 | int c, count = 0; |
| 2401 | |
| 2402 | if (snd_BUG_ON(!info->chmap)) |
| 2403 | return -EINVAL; |
| 2404 | if (size < 8) |
| 2405 | return -ENOMEM; |
| 2406 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) |
| 2407 | return -EFAULT; |
| 2408 | size -= 8; |
| 2409 | dst = tlv + 2; |
| 2410 | for (map = info->chmap; map->channels; map++) { |
| 2411 | int chs_bytes = map->channels * 4; |
| 2412 | if (!valid_chmap_channels(info, map->channels)) |
| 2413 | continue; |
| 2414 | if (size < 8) |
| 2415 | return -ENOMEM; |
| 2416 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || |
| 2417 | put_user(chs_bytes, dst + 1)) |
| 2418 | return -EFAULT; |
| 2419 | dst += 2; |
| 2420 | size -= 8; |
| 2421 | count += 8; |
| 2422 | if (size < chs_bytes) |
| 2423 | return -ENOMEM; |
| 2424 | size -= chs_bytes; |
| 2425 | count += chs_bytes; |
| 2426 | for (c = 0; c < map->channels; c++) { |
| 2427 | if (put_user(map->map[c], dst)) |
| 2428 | return -EFAULT; |
| 2429 | dst++; |
| 2430 | } |
| 2431 | } |
| 2432 | if (put_user(count, tlv + 1)) |
| 2433 | return -EFAULT; |
| 2434 | return 0; |
| 2435 | } |
| 2436 | |
| 2437 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) |
| 2438 | { |
| 2439 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
| 2440 | info->pcm->streams[info->stream].chmap_kctl = NULL; |
| 2441 | kfree(info); |
| 2442 | } |
| 2443 | |
| 2444 | /** |
| 2445 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements |
| 2446 | * @pcm: the assigned PCM instance |
| 2447 | * @stream: stream direction |
| 2448 | * @chmap: channel map elements (for query) |
| 2449 | * @max_channels: the max number of channels for the stream |
| 2450 | * @private_value: the value passed to each kcontrol's private_value field |
| 2451 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL |
| 2452 | * |
| 2453 | * Create channel-mapping control elements assigned to the given PCM stream(s). |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 2454 | * Return: Zero if successful, or a negative error value. |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2455 | */ |
| 2456 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, |
| 2457 | const struct snd_pcm_chmap_elem *chmap, |
| 2458 | int max_channels, |
| 2459 | unsigned long private_value, |
| 2460 | struct snd_pcm_chmap **info_ret) |
| 2461 | { |
| 2462 | struct snd_pcm_chmap *info; |
| 2463 | struct snd_kcontrol_new knew = { |
| 2464 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, |
| 2465 | .access = SNDRV_CTL_ELEM_ACCESS_READ | |
Takashi Iwai | 2d3391e | 2012-07-27 18:27:00 +0200 | [diff] [blame] | 2466 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
| 2467 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, |
| 2468 | .info = pcm_chmap_ctl_info, |
| 2469 | .get = pcm_chmap_ctl_get, |
| 2470 | .tlv.c = pcm_chmap_ctl_tlv, |
| 2471 | }; |
| 2472 | int err; |
| 2473 | |
| 2474 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
| 2475 | if (!info) |
| 2476 | return -ENOMEM; |
| 2477 | info->pcm = pcm; |
| 2478 | info->stream = stream; |
| 2479 | info->chmap = chmap; |
| 2480 | info->max_channels = max_channels; |
| 2481 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 2482 | knew.name = "Playback Channel Map"; |
| 2483 | else |
| 2484 | knew.name = "Capture Channel Map"; |
| 2485 | knew.device = pcm->device; |
| 2486 | knew.count = pcm->streams[stream].substream_count; |
| 2487 | knew.private_value = private_value; |
| 2488 | info->kctl = snd_ctl_new1(&knew, info); |
| 2489 | if (!info->kctl) { |
| 2490 | kfree(info); |
| 2491 | return -ENOMEM; |
| 2492 | } |
| 2493 | info->kctl->private_free = pcm_chmap_ctl_private_free; |
| 2494 | err = snd_ctl_add(pcm->card, info->kctl); |
| 2495 | if (err < 0) |
| 2496 | return err; |
| 2497 | pcm->streams[stream].chmap_kctl = info->kctl; |
| 2498 | if (info_ret) |
| 2499 | *info_ret = info; |
| 2500 | return 0; |
| 2501 | } |
| 2502 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |