| Andy Walls | 269c11f | 2012-09-02 19:13:14 -0300 | [diff] [blame] | 1 | /* |
| 2 | * ALSA interface to ivtv PCM capture streams |
| 3 | * |
| 4 | * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net> |
| 5 | * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com> |
| 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 |
| 20 | * 02111-1307 USA |
| 21 | */ |
| 22 | |
| 23 | struct snd_card; |
| 24 | |
| 25 | struct snd_ivtv_card { |
| 26 | struct v4l2_device *v4l2_dev; |
| 27 | struct snd_card *sc; |
| 28 | unsigned int capture_transfer_done; |
| 29 | unsigned int hwptr_done_capture; |
| 30 | struct snd_pcm_substream *capture_pcm_substream; |
| 31 | spinlock_t slock; |
| 32 | }; |
| 33 | |
| 34 | extern int ivtv_alsa_debug; |
| 35 | |
| 36 | /* |
| 37 | * File operations that manipulate the encoder or video or audio subdevices |
| 38 | * need to be serialized. Use the same lock we use for v4l2 file ops. |
| 39 | */ |
| 40 | static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc) |
| 41 | { |
| 42 | struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); |
| 43 | mutex_lock(&itv->serialize_lock); |
| 44 | } |
| 45 | |
| 46 | static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc) |
| 47 | { |
| 48 | struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); |
| 49 | mutex_unlock(&itv->serialize_lock); |
| 50 | } |
| 51 | |
| 52 | #define IVTV_ALSA_DBGFLG_WARN (1 << 0) |
| 53 | #define IVTV_ALSA_DBGFLG_INFO (1 << 1) |
| 54 | |
| 55 | #define IVTV_ALSA_DEBUG(x, type, fmt, args...) \ |
| 56 | do { \ |
| 57 | if ((x) & ivtv_alsa_debug) \ |
| 58 | pr_info("%s-alsa: " type ": " fmt, \ |
| 59 | v4l2_dev->name , ## args); \ |
| 60 | } while (0) |
| 61 | |
| 62 | #define IVTV_ALSA_DEBUG_WARN(fmt, args...) \ |
| 63 | IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args) |
| 64 | |
| 65 | #define IVTV_ALSA_DEBUG_INFO(fmt, args...) \ |
| 66 | IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args) |
| 67 | |
| 68 | #define IVTV_ALSA_ERR(fmt, args...) \ |
| 69 | pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args) |
| 70 | |
| 71 | #define IVTV_ALSA_WARN(fmt, args...) \ |
| 72 | pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args) |
| 73 | |
| 74 | #define IVTV_ALSA_INFO(fmt, args...) \ |
| 75 | pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args) |