/* * ALSA interface to cx18 PCM capture streams * * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ struct snd_card; struct snd_cx18_card { struct v4l2_device *v4l2_dev; struct snd_card *sc; unsigned int capture_transfer_done; unsigned int hwptr_done_capture; struct snd_pcm_substream *capture_pcm_substream; spinlock_t slock; }; extern int cx18_alsa_debug; /* * File operations that manipulate the encoder or video or audio subdevices * need to be serialized. Use the same lock we use for v4l2 file ops. */ static inline void snd_cx18_lock(struct snd_cx18_card *cxsc) { struct cx18 *cx = to_cx18(cxsc->v4l2_dev); mutex_lock(&cx->serialize_lock); } static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc) { struct cx18 *cx = to_cx18(cxsc->v4l2_dev); mutex_unlock(&cx->serialize_lock); } #define CX18_ALSA_DBGFLG_WARN (1 << 0) #define CX18_ALSA_DBGFLG_INFO (1 << 1) #define CX18_ALSA_DEBUG(x, type, fmt, args...) \ do { \ if ((x) & cx18_alsa_debug) \ printk(KERN_INFO "%s-alsa: " type ": " fmt, \ v4l2_dev->name , ## args); \ } while (0) #define CX18_ALSA_DEBUG_WARN(fmt, args...) \ CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args) #define CX18_ALSA_DEBUG_INFO(fmt, args...) \ CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args) #define CX18_ALSA_ERR(fmt, args...) \ printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args) #define CX18_ALSA_WARN(fmt, args...) \ printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args) #define CX18_ALSA_INFO(fmt, args...) \ printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)