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/*
* media.h - Media Controller specific ALSA driver code
*
* Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com>
* Copyright (c) 2016 Samsung Electronics Co., Ltd.
*
* This file is released under the GPLv2.
*/
/*
* This file adds Media Controller support to ALSA driver
* to use the Media Controller API to share tuner with DVB
* and V4L2 drivers that control media device. Media device
* is created based on existing quirks framework. Using this
* approach, the media controller API usage can be added for
* a specific device.
*/
#ifndef __MEDIA_H
#ifdef CONFIG_SND_USB_AUDIO_USE_MEDIA_CONTROLLER
#include <media/media-device.h>
#include <media/media-entity.h>
#include <sound/asound.h>
struct media_ctl {
struct media_device *media_dev;
struct media_entity media_entity;
struct media_intf_devnode *intf_devnode;
struct media_link *intf_link;
struct media_pad media_pad;
struct media_pipeline media_pipe;
};
/*
* One source pad each for SNDRV_PCM_STREAM_CAPTURE and
* SNDRV_PCM_STREAM_PLAYBACK. One for sink pad to link
* to AUDIO Source
*/
#define MEDIA_MIXER_PAD_MAX (SNDRV_PCM_STREAM_LAST + 2)
struct media_mixer_ctl {
struct media_device *media_dev;
struct media_entity media_entity;
struct media_intf_devnode *intf_devnode;
struct media_link *intf_link;
struct media_pad media_pad[MEDIA_MIXER_PAD_MAX];
struct media_pipeline media_pipe;
};
int media_snd_device_create(struct snd_usb_audio *chip,
struct usb_interface *iface);
void media_snd_device_delete(struct snd_usb_audio *chip);
int media_snd_stream_init(struct snd_usb_substream *subs, struct snd_pcm *pcm,
int stream);
void media_snd_stream_delete(struct snd_usb_substream *subs);
int media_snd_start_pipeline(struct snd_usb_substream *subs);
void media_snd_stop_pipeline(struct snd_usb_substream *subs);
#else
static inline int media_snd_device_create(struct snd_usb_audio *chip,
struct usb_interface *iface)
{ return 0; }
static inline void media_snd_device_delete(struct snd_usb_audio *chip) { }
static inline int media_snd_stream_init(struct snd_usb_substream *subs,
struct snd_pcm *pcm, int stream)
{ return 0; }
static inline void media_snd_stream_delete(struct snd_usb_substream *subs) { }
static inline int media_snd_start_pipeline(struct snd_usb_substream *subs)
{ return 0; }
static inline void media_snd_stop_pipeline(struct snd_usb_substream *subs) { }
#endif
#endif /* __MEDIA_H */
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