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products/Sources/formale Sprachen/C/Linux/include/uapi/linux/dvb/ (Open Source Betriebssystem Version 6.17.9^©) Datei vom 24.10.2025 mit Größe 2 kB

Quelle audio.h Sprache: C

/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
/*
* audio.h - DEPRECATED MPEG-TS audio decoder API
*
* NOTE: should not be used on future drivers
*
* Copyright (C) 2000 Ralph  Metzler <ralph@convergence.de>
*                  & Marcus Metzler <marcus@convergence.de>
*                    for convergence integrated media GmbH
*/

#ifndef _DVBAUDIO_H_
#define _DVBAUDIO_H_

#include <linux/types.h>

typedef enum {
AUDIO_SOURCE_DEMUX, /* Select the demux as the main source */
AUDIO_SOURCE_MEMORY /* Select internal memory as the main source */
} audio_stream_source_t;

typedef enum {
AUDIO_STOPPED,      /* Device is stopped */
AUDIO_PLAYING,      /* Device is currently playing */
AUDIO_PAUSED        /* Device is paused */
} audio_play_state_t;

typedef enum {
AUDIO_STEREO,
AUDIO_MONO_LEFT,
AUDIO_MONO_RIGHT,
AUDIO_MONO,
AUDIO_STEREO_SWAPPED
} audio_channel_select_t;

typedef struct audio_mixer {
unsigned int volume_left;
unsigned int volume_right;
  /* what else do we need? bass, pass-through, ... */
} audio_mixer_t;

typedef struct audio_status {
int                    AV_sync_state;  /* sync audio and video? */
int                    mute_state;     /* audio is muted */
audio_play_state_t     play_state;     /* current playback state */
audio_stream_source_t  stream_source;  /* current stream source */
audio_channel_select_t channel_select; /* currently selected channel */
int                    bypass_mode;    /* pass on audio data to */
audio_mixer_t        mixer_state;    /* current mixer state */
} audio_status_t;                              /* separate decoder hardware */

/* for GET_CAPABILITIES and SET_FORMAT, the latter should only set one bit */
#define AUDIO_CAP_DTS    1
#define AUDIO_CAP_LPCM   2
#define AUDIO_CAP_MP1    4
#define AUDIO_CAP_MP2    8
#define AUDIO_CAP_MP3   16
#define AUDIO_CAP_AAC   32
#define AUDIO_CAP_OGG   64
#define AUDIO_CAP_SDDS 128
#define AUDIO_CAP_AC3  256

#define AUDIO_STOP                 _IO('o', 1)
#define AUDIO_PLAY                 _IO('o', 2)
#define AUDIO_PAUSE                _IO('o', 3)
#define AUDIO_CONTINUE             _IO('o', 4)
#define AUDIO_SELECT_SOURCE        _IO('o', 5)
#define AUDIO_SET_MUTE             _IO('o', 6)
#define AUDIO_SET_AV_SYNC          _IO('o', 7)
#define AUDIO_SET_BYPASS_MODE      _IO('o', 8)
#define AUDIO_CHANNEL_SELECT       _IO('o', 9)
#define AUDIO_GET_STATUS           _IOR('o', 10, audio_status_t)

#define AUDIO_GET_CAPABILITIES     _IOR('o', 11, unsigned int)
#define AUDIO_CLEAR_BUFFER         _IO('o',  12)
#define AUDIO_SET_ID               _IO('o', 13)
#define AUDIO_SET_MIXER            _IOW('o', 14, audio_mixer_t)
#define AUDIO_SET_STREAMTYPE       _IO('o', 15)
#define AUDIO_BILINGUAL_CHANNEL_SELECT _IO('o', 20)

#endif /* _DVBAUDIO_H_ */

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