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 18 struct snd_card; 19 20 struct snd_ivtv_card { 21 struct v4l2_device *v4l2_dev; 22 struct snd_card *sc; 23 unsigned int capture_transfer_done; 24 unsigned int hwptr_done_capture; 25 struct snd_pcm_substream *capture_pcm_substream; 26 spinlock_t slock; 27 }; 28 29 extern int ivtv_alsa_debug; 30 31 /* 32 * File operations that manipulate the encoder or video or audio subdevices 33 * need to be serialized. Use the same lock we use for v4l2 file ops. 34 */ 35 static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc) 36 { 37 struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); 38 mutex_lock(&itv->serialize_lock); 39 } 40 41 static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc) 42 { 43 struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); 44 mutex_unlock(&itv->serialize_lock); 45 } 46 47 #define IVTV_ALSA_DBGFLG_WARN (1 << 0) 48 #define IVTV_ALSA_DBGFLG_INFO (1 << 1) 49 50 #define IVTV_ALSA_DEBUG(x, type, fmt, args...) \ 51 do { \ 52 if ((x) & ivtv_alsa_debug) \ 53 pr_info("%s-alsa: " type ": " fmt, \ 54 v4l2_dev->name , ## args); \ 55 } while (0) 56 57 #define IVTV_ALSA_DEBUG_WARN(fmt, args...) \ 58 IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args) 59 60 #define IVTV_ALSA_DEBUG_INFO(fmt, args...) \ 61 IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args) 62 63 #define IVTV_ALSA_ERR(fmt, args...) \ 64 pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args) 65 66 #define IVTV_ALSA_WARN(fmt, args...) \ 67 pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args) 68 69 #define IVTV_ALSA_INFO(fmt, args...) \ 70 pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args) 71