Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 1 | /* |
| 2 | * BSD LICENSE |
| 3 | * |
| 4 | * tinycompress library for compress audio offload in alsa |
| 5 | * Copyright (c) 2011-2012, Intel Corporation |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Author: Vinod Koul <vinod.koul@linux.intel.com> |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions are met: |
| 12 | * |
| 13 | * Redistributions of source code must retain the above copyright notice, |
| 14 | * this list of conditions and the following disclaimer. |
| 15 | * Redistributions in binary form must reproduce the above copyright notice, |
| 16 | * this list of conditions and the following disclaimer in the documentation |
| 17 | * and/or other materials provided with the distribution. |
| 18 | * Neither the name of Intel Corporation nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 26 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 29 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 31 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 32 | * THE POSSIBILITY OF SUCH DAMAGE. |
| 33 | * |
| 34 | * LGPL LICENSE |
| 35 | * |
| 36 | * tinycompress library for compress audio offload in alsa |
| 37 | * Copyright (c) 2011-2012, Intel Corporation. |
| 38 | * |
| 39 | * |
| 40 | * This program is free software; you can redistribute it and/or modify it |
| 41 | * under the terms and conditions of the GNU Lesser General Public License, |
| 42 | * version 2.1, as published by the Free Software Foundation. |
| 43 | * |
| 44 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 45 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 46 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 47 | * License for more details. |
| 48 | * |
| 49 | * You should have received a copy of the GNU Lesser General Public License |
| 50 | * along with this program; if not, write to |
| 51 | * the Free Software Foundation, Inc., |
| 52 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 53 | */ |
| 54 | |
| 55 | #include <stdio.h> |
| 56 | #include <stdlib.h> |
| 57 | #include <fcntl.h> |
| 58 | #include <stdarg.h> |
| 59 | #include <string.h> |
| 60 | #include <errno.h> |
| 61 | #include <unistd.h> |
| 62 | #include <poll.h> |
| 63 | #include <stdbool.h> |
| 64 | #include <sys/ioctl.h> |
| 65 | #include <sys/mman.h> |
| 66 | #include <sys/time.h> |
| 67 | #include <limits.h> |
| 68 | |
| 69 | #include <linux/types.h> |
| 70 | #include <linux/ioctl.h> |
| 71 | #define __force |
| 72 | #define __bitwise |
| 73 | #define __user |
| 74 | #include <sound/asound.h> |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 75 | #include "sound/compress_params.h" |
| 76 | #include "sound/compress_offload.h" |
| 77 | #include "tinycompress/tinycompress.h" |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 78 | |
| 79 | #define COMPR_ERR_MAX 128 |
| 80 | |
| 81 | /* Default maximum time we will wait in a poll() - 20 seconds */ |
| 82 | #define DEFAULT_MAX_POLL_WAIT_MS 20000 |
| 83 | |
| 84 | struct compress { |
| 85 | int fd; |
| 86 | unsigned int flags; |
| 87 | char error[COMPR_ERR_MAX]; |
| 88 | struct compr_config *config; |
| 89 | int running; |
| 90 | int max_poll_wait_ms; |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 91 | int nonblocking; |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 92 | unsigned int gapless_metadata; |
| 93 | unsigned int next_track; |
| 94 | }; |
| 95 | |
| 96 | static int oops(struct compress *compress, int e, const char *fmt, ...) |
| 97 | { |
| 98 | va_list ap; |
| 99 | int sz; |
| 100 | |
| 101 | va_start(ap, fmt); |
| 102 | vsnprintf(compress->error, COMPR_ERR_MAX, fmt, ap); |
| 103 | va_end(ap); |
| 104 | sz = strlen(compress->error); |
| 105 | |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 106 | snprintf(compress->error + sz, COMPR_ERR_MAX - sz, |
| 107 | ": %s", strerror(e)); |
| 108 | errno = e; |
| 109 | |
Naresh Tanniru | aeb849a | 2014-06-04 18:23:00 +0530 | [diff] [blame] | 110 | return -errno; |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | const char *compress_get_error(struct compress *compress) |
| 114 | { |
| 115 | return compress->error; |
| 116 | } |
| 117 | static struct compress bad_compress = { |
| 118 | .fd = -1, |
| 119 | }; |
| 120 | |
| 121 | int is_compress_running(struct compress *compress) |
| 122 | { |
| 123 | return ((compress->fd > 0) && compress->running) ? 1 : 0; |
| 124 | } |
| 125 | |
| 126 | int is_compress_ready(struct compress *compress) |
| 127 | { |
| 128 | return (compress->fd > 0) ? 1 : 0; |
| 129 | } |
| 130 | |
| 131 | static int get_compress_version(struct compress *compress) |
| 132 | { |
| 133 | int version = 0; |
| 134 | |
| 135 | if (ioctl(compress->fd, SNDRV_COMPRESS_IOCTL_VERSION, &version)) { |
| 136 | oops(compress, errno, "cant read version"); |
| 137 | return -1; |
| 138 | } |
| 139 | return version; |
| 140 | } |
| 141 | |
| 142 | static bool _is_codec_supported(struct compress *compress, struct compr_config *config, |
| 143 | const struct snd_compr_caps *caps) |
| 144 | { |
| 145 | bool codec = false; |
| 146 | unsigned int i; |
| 147 | |
| 148 | for (i = 0; i < caps->num_codecs; i++) { |
| 149 | if (caps->codecs[i] == config->codec->id) { |
| 150 | /* found the codec */ |
| 151 | codec = true; |
| 152 | break; |
| 153 | } |
| 154 | } |
| 155 | if (codec == false) { |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 156 | oops(compress, ENXIO, "this codec is not supported"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 157 | return false; |
| 158 | } |
| 159 | |
| 160 | if (config->fragment_size < caps->min_fragment_size) { |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 161 | oops(compress, EINVAL, "requested fragment size %d is below min supported %d", |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 162 | config->fragment_size, caps->min_fragment_size); |
| 163 | return false; |
| 164 | } |
| 165 | if (config->fragment_size > caps->max_fragment_size) { |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 166 | oops(compress, EINVAL, "requested fragment size %d is above max supported %d", |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 167 | config->fragment_size, caps->max_fragment_size); |
| 168 | return false; |
| 169 | } |
| 170 | if (config->fragments < caps->min_fragments) { |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 171 | oops(compress, EINVAL, "requested fragments %d are below min supported %d", |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 172 | config->fragments, caps->min_fragments); |
| 173 | return false; |
| 174 | } |
| 175 | if (config->fragments > caps->max_fragments) { |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 176 | oops(compress, EINVAL, "requested fragments %d are above max supported %d", |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 177 | config->fragments, caps->max_fragments); |
| 178 | return false; |
| 179 | } |
| 180 | |
| 181 | /* TODO: match the codec properties */ |
| 182 | return true; |
| 183 | } |
| 184 | |
| 185 | static bool _is_codec_type_supported(int fd, struct snd_codec *codec) |
| 186 | { |
| 187 | struct snd_compr_caps caps; |
| 188 | bool found = false; |
| 189 | unsigned int i; |
| 190 | |
| 191 | if (ioctl(fd, SNDRV_COMPRESS_GET_CAPS, &caps)) { |
| 192 | oops(&bad_compress, errno, "cannot get device caps"); |
| 193 | return false; |
| 194 | } |
| 195 | |
| 196 | for (i = 0; i < caps.num_codecs; i++) { |
| 197 | if (caps.codecs[i] == codec->id) { |
| 198 | /* found the codec */ |
| 199 | found = true; |
| 200 | break; |
| 201 | } |
| 202 | } |
| 203 | /* TODO: match the codec properties */ |
| 204 | return found; |
| 205 | } |
| 206 | |
| 207 | static inline void |
| 208 | fill_compress_params(struct compr_config *config, struct snd_compr_params *params) |
| 209 | { |
| 210 | params->buffer.fragment_size = config->fragment_size; |
| 211 | params->buffer.fragments = config->fragments; |
| 212 | memcpy(¶ms->codec, config->codec, sizeof(params->codec)); |
| 213 | } |
| 214 | |
| 215 | struct compress *compress_open(unsigned int card, unsigned int device, |
| 216 | unsigned int flags, struct compr_config *config) |
| 217 | { |
| 218 | struct compress *compress; |
| 219 | struct snd_compr_params params; |
| 220 | struct snd_compr_caps caps; |
| 221 | char fn[256]; |
| 222 | |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 223 | if (!config) { |
| 224 | oops(&bad_compress, EINVAL, "passed bad config"); |
| 225 | return &bad_compress; |
| 226 | } |
| 227 | |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 228 | compress = calloc(1, sizeof(struct compress)); |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 229 | if (!compress) { |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 230 | oops(&bad_compress, errno, "cannot allocate compress object"); |
| 231 | return &bad_compress; |
| 232 | } |
| 233 | |
| 234 | compress->next_track = 0; |
| 235 | compress->gapless_metadata = 0; |
| 236 | compress->config = calloc(1, sizeof(*config)); |
| 237 | if (!compress->config) |
| 238 | goto input_fail; |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 239 | |
| 240 | snprintf(fn, sizeof(fn), "/dev/snd/comprC%uD%u", card, device); |
| 241 | |
| 242 | compress->max_poll_wait_ms = DEFAULT_MAX_POLL_WAIT_MS; |
| 243 | |
| 244 | compress->flags = flags; |
| 245 | if (!((flags & COMPRESS_OUT) || (flags & COMPRESS_IN))) { |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 246 | oops(&bad_compress, EINVAL, "can't deduce device direction from given flags"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 247 | goto config_fail; |
| 248 | } |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 249 | |
Eric Laurent | f0c4078 | 2013-05-02 18:10:20 -0700 | [diff] [blame] | 250 | if (flags & COMPRESS_OUT) { |
| 251 | compress->fd = open(fn, O_RDONLY); |
| 252 | } else { |
| 253 | compress->fd = open(fn, O_WRONLY); |
| 254 | } |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 255 | if (compress->fd < 0) { |
| 256 | oops(&bad_compress, errno, "cannot open device '%s'", fn); |
| 257 | goto config_fail; |
| 258 | } |
| 259 | |
| 260 | if (ioctl(compress->fd, SNDRV_COMPRESS_GET_CAPS, &caps)) { |
| 261 | oops(compress, errno, "cannot get device caps"); |
| 262 | goto codec_fail; |
| 263 | } |
| 264 | |
| 265 | /* If caller passed "don't care" fill in default values */ |
| 266 | if ((config->fragment_size == 0) || (config->fragments == 0)) { |
| 267 | config->fragment_size = caps.min_fragment_size; |
| 268 | config->fragments = caps.max_fragments; |
| 269 | } |
| 270 | |
| 271 | #if 0 |
| 272 | /* FIXME need to turn this On when DSP supports |
| 273 | * and treat in no support case |
| 274 | */ |
| 275 | if (_is_codec_supported(compress, config, &caps) == false) { |
| 276 | oops(compress, errno, "codec not supported\n"); |
| 277 | goto codec_fail; |
| 278 | } |
| 279 | #endif |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 280 | |
| 281 | memcpy(compress->config, config, sizeof(*compress->config)); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 282 | fill_compress_params(config, ¶ms); |
| 283 | |
| 284 | if (ioctl(compress->fd, SNDRV_COMPRESS_SET_PARAMS, ¶ms)) { |
| 285 | oops(&bad_compress, errno, "cannot set device"); |
| 286 | goto codec_fail; |
| 287 | } |
| 288 | |
| 289 | return compress; |
| 290 | |
| 291 | codec_fail: |
| 292 | close(compress->fd); |
| 293 | compress->fd = -1; |
| 294 | config_fail: |
| 295 | free(compress->config); |
| 296 | input_fail: |
| 297 | free(compress); |
| 298 | return &bad_compress; |
| 299 | } |
| 300 | |
| 301 | void compress_close(struct compress *compress) |
| 302 | { |
| 303 | if (compress == &bad_compress) |
| 304 | return; |
| 305 | |
| 306 | if (compress->fd >= 0) |
| 307 | close(compress->fd); |
| 308 | compress->running = 0; |
| 309 | compress->fd = -1; |
| 310 | free(compress->config); |
| 311 | free(compress); |
| 312 | } |
| 313 | |
| 314 | int compress_get_hpointer(struct compress *compress, |
| 315 | unsigned int *avail, struct timespec *tstamp) |
| 316 | { |
| 317 | struct snd_compr_avail kavail; |
| 318 | __u64 time; |
| 319 | |
| 320 | if (!is_compress_ready(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 321 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 322 | |
| 323 | if (ioctl(compress->fd, SNDRV_COMPRESS_AVAIL, &kavail)) |
| 324 | return oops(compress, errno, "cannot get avail"); |
| 325 | if (0 == kavail.tstamp.sampling_rate) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 326 | return oops(compress, ENODATA, "sample rate unknown"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 327 | *avail = (unsigned int)kavail.avail; |
| 328 | time = kavail.tstamp.pcm_io_frames / kavail.tstamp.sampling_rate; |
| 329 | tstamp->tv_sec = time; |
| 330 | time = kavail.tstamp.pcm_io_frames % kavail.tstamp.sampling_rate; |
| 331 | tstamp->tv_nsec = time * 1000000000 / kavail.tstamp.sampling_rate; |
| 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | int compress_get_tstamp(struct compress *compress, |
| 336 | unsigned long *samples, unsigned int *sampling_rate) |
| 337 | { |
| 338 | struct snd_compr_tstamp ktstamp; |
| 339 | |
| 340 | if (!is_compress_ready(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 341 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 342 | |
| 343 | if (ioctl(compress->fd, SNDRV_COMPRESS_TSTAMP, &ktstamp)) |
| 344 | return oops(compress, errno, "cannot get tstamp"); |
| 345 | |
| 346 | *samples = ktstamp.pcm_io_frames; |
| 347 | *sampling_rate = ktstamp.sampling_rate; |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | int compress_write(struct compress *compress, const void *buf, unsigned int size) |
| 352 | { |
| 353 | struct snd_compr_avail avail; |
| 354 | struct pollfd fds; |
| 355 | int to_write = 0; /* zero indicates we haven't written yet */ |
| 356 | int written, total = 0, ret; |
| 357 | const char* cbuf = buf; |
| 358 | const unsigned int frag_size = compress->config->fragment_size; |
| 359 | |
| 360 | if (!(compress->flags & COMPRESS_IN)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 361 | return oops(compress, EINVAL, "Invalid flag set"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 362 | if (!is_compress_ready(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 363 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 364 | fds.fd = compress->fd; |
| 365 | fds.events = POLLOUT; |
| 366 | |
| 367 | /*TODO: treat auto start here first */ |
| 368 | while (size) { |
| 369 | if (ioctl(compress->fd, SNDRV_COMPRESS_AVAIL, &avail)) |
| 370 | return oops(compress, errno, "cannot get avail"); |
| 371 | |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 372 | /* We can write if we have at least one fragment available |
| 373 | * or there is enough space for all remaining data |
| 374 | */ |
| 375 | if ((avail.avail < frag_size) && (avail.avail < size)) { |
| 376 | |
| 377 | if (compress->nonblocking) |
| 378 | return total; |
| 379 | |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 380 | ret = poll(&fds, 1, compress->max_poll_wait_ms); |
Richard Fitzgerald | a85e245 | 2013-08-29 09:32:02 +0100 | [diff] [blame] | 381 | if (fds.revents & POLLERR) { |
| 382 | return oops(compress, EIO, "poll returned error!"); |
| 383 | } |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 384 | /* A pause will cause -EBADFD or zero. |
| 385 | * This is not an error, just stop writing */ |
| 386 | if ((ret == 0) || (ret == -EBADFD)) |
| 387 | break; |
| 388 | if (ret < 0) |
| 389 | return oops(compress, errno, "poll error"); |
| 390 | if (fds.revents & POLLOUT) { |
| 391 | continue; |
| 392 | } |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 393 | } |
| 394 | /* write avail bytes */ |
| 395 | if (size > avail.avail) |
| 396 | to_write = avail.avail; |
| 397 | else |
| 398 | to_write = size; |
| 399 | written = write(compress->fd, cbuf, to_write); |
| 400 | /* If play was paused the write returns -EBADFD */ |
| 401 | if (written == -EBADFD) |
| 402 | break; |
| 403 | if (written < 0) |
| 404 | return oops(compress, errno, "write failed!"); |
| 405 | |
| 406 | size -= written; |
| 407 | cbuf += written; |
| 408 | total += written; |
| 409 | } |
| 410 | return total; |
| 411 | } |
| 412 | |
| 413 | int compress_read(struct compress *compress, void *buf, unsigned int size) |
| 414 | { |
Eric Laurent | f0c4078 | 2013-05-02 18:10:20 -0700 | [diff] [blame] | 415 | struct snd_compr_avail avail; |
| 416 | struct pollfd fds; |
| 417 | int to_read = 0; |
| 418 | int num_read, total = 0, ret; |
| 419 | char* cbuf = buf; |
| 420 | const unsigned int frag_size = compress->config->fragment_size; |
| 421 | |
| 422 | if (!(compress->flags & COMPRESS_OUT)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 423 | return oops(compress, EINVAL, "Invalid flag set"); |
Eric Laurent | f0c4078 | 2013-05-02 18:10:20 -0700 | [diff] [blame] | 424 | if (!is_compress_ready(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 425 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | f0c4078 | 2013-05-02 18:10:20 -0700 | [diff] [blame] | 426 | fds.fd = compress->fd; |
| 427 | fds.events = POLLIN; |
| 428 | |
| 429 | while (size) { |
| 430 | if (ioctl(compress->fd, SNDRV_COMPRESS_AVAIL, &avail)) |
| 431 | return oops(compress, errno, "cannot get avail"); |
| 432 | |
| 433 | if ( (avail.avail < frag_size) && (avail.avail < size) ) { |
| 434 | /* Less than one fragment available and not at the |
| 435 | * end of the read, so poll |
| 436 | */ |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 437 | if (compress->nonblocking) |
| 438 | return total; |
| 439 | |
Eric Laurent | f0c4078 | 2013-05-02 18:10:20 -0700 | [diff] [blame] | 440 | ret = poll(&fds, 1, compress->max_poll_wait_ms); |
Richard Fitzgerald | a85e245 | 2013-08-29 09:32:02 +0100 | [diff] [blame] | 441 | if (fds.revents & POLLERR) { |
| 442 | return oops(compress, EIO, "poll returned error!"); |
| 443 | } |
Eric Laurent | f0c4078 | 2013-05-02 18:10:20 -0700 | [diff] [blame] | 444 | /* A pause will cause -EBADFD or zero. |
| 445 | * This is not an error, just stop reading */ |
| 446 | if ((ret == 0) || (ret == -EBADFD)) |
| 447 | break; |
| 448 | if (ret < 0) |
| 449 | return oops(compress, errno, "poll error"); |
| 450 | if (fds.revents & POLLIN) { |
| 451 | continue; |
| 452 | } |
Eric Laurent | f0c4078 | 2013-05-02 18:10:20 -0700 | [diff] [blame] | 453 | } |
| 454 | /* read avail bytes */ |
| 455 | if (size > avail.avail) |
| 456 | to_read = avail.avail; |
| 457 | else |
| 458 | to_read = size; |
| 459 | num_read = read(compress->fd, cbuf, to_read); |
| 460 | /* If play was paused the read returns -EBADFD */ |
| 461 | if (num_read == -EBADFD) |
| 462 | break; |
| 463 | if (num_read < 0) |
| 464 | return oops(compress, errno, "read failed!"); |
| 465 | |
| 466 | size -= num_read; |
| 467 | cbuf += num_read; |
| 468 | total += num_read; |
| 469 | } |
| 470 | |
| 471 | return total; |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | int compress_start(struct compress *compress) |
| 475 | { |
| 476 | if (!is_compress_ready(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 477 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 478 | if (ioctl(compress->fd, SNDRV_COMPRESS_START)) |
| 479 | return oops(compress, errno, "cannot start the stream"); |
| 480 | compress->running = 1; |
| 481 | return 0; |
| 482 | |
| 483 | } |
| 484 | |
| 485 | int compress_stop(struct compress *compress) |
| 486 | { |
| 487 | if (!is_compress_running(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 488 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 489 | if (ioctl(compress->fd, SNDRV_COMPRESS_STOP)) |
| 490 | return oops(compress, errno, "cannot stop the stream"); |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | int compress_pause(struct compress *compress) |
| 495 | { |
| 496 | if (!is_compress_running(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 497 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 498 | if (ioctl(compress->fd, SNDRV_COMPRESS_PAUSE)) |
| 499 | return oops(compress, errno, "cannot pause the stream"); |
| 500 | return 0; |
| 501 | } |
| 502 | |
| 503 | int compress_resume(struct compress *compress) |
| 504 | { |
| 505 | if (ioctl(compress->fd, SNDRV_COMPRESS_RESUME)) |
| 506 | return oops(compress, errno, "cannot resume the stream"); |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | int compress_drain(struct compress *compress) |
| 511 | { |
| 512 | if (!is_compress_running(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 513 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 514 | if (ioctl(compress->fd, SNDRV_COMPRESS_DRAIN)) |
| 515 | return oops(compress, errno, "cannot drain the stream"); |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | int compress_partial_drain(struct compress *compress) |
| 520 | { |
| 521 | if (!is_compress_running(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 522 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 523 | |
| 524 | if (!compress->next_track) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 525 | return oops(compress, EPERM, "next track not signalled"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 526 | if (ioctl(compress->fd, SNDRV_COMPRESS_PARTIAL_DRAIN)) |
| 527 | return oops(compress, errno, "cannot drain the stream\n"); |
| 528 | compress->next_track = 0; |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | int compress_next_track(struct compress *compress) |
| 533 | { |
| 534 | if (!is_compress_running(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 535 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 536 | |
| 537 | if (!compress->gapless_metadata) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 538 | return oops(compress, EPERM, "metadata not set"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 539 | if (ioctl(compress->fd, SNDRV_COMPRESS_NEXT_TRACK)) |
| 540 | return oops(compress, errno, "cannot set next track\n"); |
| 541 | compress->next_track = 1; |
| 542 | compress->gapless_metadata = 0; |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | int compress_set_gapless_metadata(struct compress *compress, |
| 547 | struct compr_gapless_mdata *mdata) |
| 548 | { |
| 549 | struct snd_compr_metadata metadata; |
| 550 | int version; |
| 551 | |
| 552 | if (!is_compress_ready(compress)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 553 | return oops(compress, ENODEV, "device not ready"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 554 | |
| 555 | version = get_compress_version(compress); |
| 556 | if (version <= 0) |
| 557 | return -1; |
| 558 | |
| 559 | if (version < SNDRV_PROTOCOL_VERSION(0, 1, 1)) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 560 | return oops(compress, ENXIO, "gapless apis not supported in kernel"); |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 561 | |
| 562 | metadata.key = SNDRV_COMPRESS_ENCODER_PADDING; |
| 563 | metadata.value[0] = mdata->encoder_padding; |
| 564 | if (ioctl(compress->fd, SNDRV_COMPRESS_SET_METADATA, &metadata)) |
| 565 | return oops(compress, errno, "can't set metadata for stream\n"); |
| 566 | |
| 567 | metadata.key = SNDRV_COMPRESS_ENCODER_DELAY; |
| 568 | metadata.value[0] = mdata->encoder_delay; |
| 569 | if (ioctl(compress->fd, SNDRV_COMPRESS_SET_METADATA, &metadata)) |
| 570 | return oops(compress, errno, "can't set metadata for stream\n"); |
Amit Shekhar | ea74b53 | 2015-01-20 20:26:49 -0800 | [diff] [blame] | 571 | |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 572 | compress->gapless_metadata = 1; |
| 573 | return 0; |
| 574 | } |
| 575 | |
Chaithanya Krishna Bacharaju | a319ed7 | 2015-06-06 11:04:08 +0530 | [diff] [blame] | 576 | int compress_set_next_track_param(struct compress *compress, |
| 577 | union snd_codec_options *codec_options) |
| 578 | { |
| 579 | if (!is_compress_running(compress)) |
| 580 | return oops(compress, ENODEV, "device not ready"); |
| 581 | |
| 582 | if (ioctl(compress->fd, SNDRV_COMPRESS_SET_NEXT_TRACK_PARAM, codec_options)) |
| 583 | return oops(compress, errno, "cannot set next track params\n"); |
| 584 | return 0; |
| 585 | } |
| 586 | |
Eric Laurent | c902d7f | 2013-03-08 14:50:45 -0800 | [diff] [blame] | 587 | bool is_codec_supported(unsigned int card, unsigned int device, |
| 588 | unsigned int flags, struct snd_codec *codec) |
| 589 | { |
| 590 | unsigned int dev_flag; |
| 591 | bool ret; |
| 592 | int fd; |
| 593 | char fn[256]; |
| 594 | |
| 595 | snprintf(fn, sizeof(fn), "/dev/snd/comprC%uD%u", card, device); |
| 596 | |
| 597 | if (flags & COMPRESS_OUT) |
| 598 | dev_flag = O_RDONLY; |
| 599 | else |
| 600 | dev_flag = O_WRONLY; |
| 601 | |
| 602 | fd = open(fn, dev_flag); |
| 603 | if (fd < 0) |
| 604 | return oops(&bad_compress, errno, "cannot open device '%s'", fn); |
| 605 | |
| 606 | ret = _is_codec_type_supported(fd, codec); |
| 607 | |
| 608 | close(fd); |
| 609 | return ret; |
| 610 | } |
| 611 | |
| 612 | void compress_set_max_poll_wait(struct compress *compress, int milliseconds) |
| 613 | { |
| 614 | compress->max_poll_wait_ms = milliseconds; |
| 615 | } |
| 616 | |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 617 | void compress_nonblock(struct compress *compress, int nonblock) |
| 618 | { |
| 619 | compress->nonblocking = !!nonblock; |
| 620 | } |
| 621 | |
| 622 | int compress_wait(struct compress *compress, int timeout_ms) |
| 623 | { |
| 624 | struct pollfd fds; |
| 625 | int ret; |
| 626 | |
| 627 | fds.fd = compress->fd; |
| 628 | fds.events = POLLOUT | POLLIN; |
| 629 | |
| 630 | ret = poll(&fds, 1, timeout_ms); |
Richard Fitzgerald | ab9b85b | 2013-10-22 11:51:58 +0100 | [diff] [blame] | 631 | if (ret > 0) { |
| 632 | if (fds.revents & POLLERR) |
| 633 | return oops(compress, EIO, "poll returned error!"); |
| 634 | if (fds.revents & (POLLOUT | POLLIN)) |
| 635 | return 0; |
Richard Fitzgerald | a85e245 | 2013-08-29 09:32:02 +0100 | [diff] [blame] | 636 | } |
Richard Fitzgerald | ab9b85b | 2013-10-22 11:51:58 +0100 | [diff] [blame] | 637 | if (ret == 0) |
| 638 | return oops(compress, ETIME, "poll timed out"); |
| 639 | if (ret < 0) |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 640 | return oops(compress, errno, "poll error"); |
Richard Fitzgerald | ab9b85b | 2013-10-22 11:51:58 +0100 | [diff] [blame] | 641 | |
| 642 | return oops(compress, EIO, "poll signalled unhandled event"); |
Eric Laurent | 79c3707 | 2013-06-07 10:50:05 -0700 | [diff] [blame] | 643 | } |
| 644 | |