ivtv-alsa.h (1715B)
1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * ALSA interface to ivtv PCM capture streams 4 * 5 * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net> 6 * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com> 7 */ 8 9struct snd_card; 10 11struct snd_ivtv_card { 12 struct v4l2_device *v4l2_dev; 13 struct snd_card *sc; 14 unsigned int capture_transfer_done; 15 unsigned int hwptr_done_capture; 16 struct snd_pcm_substream *capture_pcm_substream; 17 spinlock_t slock; 18}; 19 20extern int ivtv_alsa_debug; 21 22/* 23 * File operations that manipulate the encoder or video or audio subdevices 24 * need to be serialized. Use the same lock we use for v4l2 file ops. 25 */ 26static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc) 27{ 28 struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); 29 mutex_lock(&itv->serialize_lock); 30} 31 32static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc) 33{ 34 struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); 35 mutex_unlock(&itv->serialize_lock); 36} 37 38#define IVTV_ALSA_DBGFLG_WARN (1 << 0) 39#define IVTV_ALSA_DBGFLG_INFO (1 << 1) 40 41#define IVTV_ALSA_DEBUG(x, type, fmt, args...) \ 42 do { \ 43 if ((x) & ivtv_alsa_debug) \ 44 pr_info("%s-alsa: " type ": " fmt, \ 45 v4l2_dev->name , ## args); \ 46 } while (0) 47 48#define IVTV_ALSA_DEBUG_WARN(fmt, args...) \ 49 IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args) 50 51#define IVTV_ALSA_DEBUG_INFO(fmt, args...) \ 52 IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args) 53 54#define IVTV_ALSA_ERR(fmt, args...) \ 55 pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args) 56 57#define IVTV_ALSA_WARN(fmt, args...) \ 58 pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args) 59 60#define IVTV_ALSA_INFO(fmt, args...) \ 61 pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)