linux/include/linux/dvb/audio.h
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   1/*
   2 * audio.h
   3 *
   4 * Copyright (C) 2000 Ralph  Metzler <ralph@convergence.de>
   5 *                  & Marcus Metzler <marcus@convergence.de>
   6 *                    for convergence integrated media GmbH
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Lesser Public License
  10 * as published by the Free Software Foundation; either version 2.1
  11 * of the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU Lesser General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 *
  22 */
  23
  24#ifndef _DVBAUDIO_H_
  25#define _DVBAUDIO_H_
  26
  27#include <linux/types.h>
  28
  29typedef enum {
  30        AUDIO_SOURCE_DEMUX, /* Select the demux as the main source */
  31        AUDIO_SOURCE_MEMORY /* Select internal memory as the main source */
  32} audio_stream_source_t;
  33
  34
  35typedef enum {
  36        AUDIO_STOPPED,      /* Device is stopped */
  37        AUDIO_PLAYING,      /* Device is currently playing */
  38        AUDIO_PAUSED        /* Device is paused */
  39} audio_play_state_t;
  40
  41
  42typedef enum {
  43        AUDIO_STEREO,
  44        AUDIO_MONO_LEFT,
  45        AUDIO_MONO_RIGHT,
  46        AUDIO_MONO,
  47        AUDIO_STEREO_SWAPPED
  48} audio_channel_select_t;
  49
  50
  51typedef struct audio_mixer {
  52        unsigned int volume_left;
  53        unsigned int volume_right;
  54  // what else do we need? bass, pass-through, ...
  55} audio_mixer_t;
  56
  57
  58typedef struct audio_status {
  59        int                    AV_sync_state;  /* sync audio and video? */
  60        int                    mute_state;     /* audio is muted */
  61        audio_play_state_t     play_state;     /* current playback state */
  62        audio_stream_source_t  stream_source;  /* current stream source */
  63        audio_channel_select_t channel_select; /* currently selected channel */
  64        int                    bypass_mode;    /* pass on audio data to */
  65        audio_mixer_t          mixer_state;    /* current mixer state */
  66} audio_status_t;                              /* separate decoder hardware */
  67
  68
  69typedef
  70struct audio_karaoke{  /* if Vocal1 or Vocal2 are non-zero, they get mixed  */
  71        int vocal1;    /* into left and right t at 70% each */
  72        int vocal2;    /* if both, Vocal1 and Vocal2 are non-zero, Vocal1 gets*/
  73        int melody;    /* mixed into the left channel and */
  74                       /* Vocal2 into the right channel at 100% each. */
  75                       /* if Melody is non-zero, the melody channel gets mixed*/
  76} audio_karaoke_t;     /* into left and right  */
  77
  78
  79typedef __u16 audio_attributes_t;
  80/*   bits: descr. */
  81/*   15-13 audio coding mode (0=ac3, 2=mpeg1, 3=mpeg2ext, 4=LPCM, 6=DTS, */
  82/*   12    multichannel extension */
  83/*   11-10 audio type (0=not spec, 1=language included) */
  84/*    9- 8 audio application mode (0=not spec, 1=karaoke, 2=surround) */
  85/*    7- 6 Quantization / DRC (mpeg audio: 1=DRC exists)(lpcm: 0=16bit,  */
  86/*    5- 4 Sample frequency fs (0=48kHz, 1=96kHz) */
  87/*    2- 0 number of audio channels (n+1 channels) */
  88
  89
  90/* for GET_CAPABILITIES and SET_FORMAT, the latter should only set one bit */
  91#define AUDIO_CAP_DTS    1
  92#define AUDIO_CAP_LPCM   2
  93#define AUDIO_CAP_MP1    4
  94#define AUDIO_CAP_MP2    8
  95#define AUDIO_CAP_MP3   16
  96#define AUDIO_CAP_AAC   32
  97#define AUDIO_CAP_OGG   64
  98#define AUDIO_CAP_SDDS 128
  99#define AUDIO_CAP_AC3  256
 100
 101#define AUDIO_STOP                 _IO('o', 1)
 102#define AUDIO_PLAY                 _IO('o', 2)
 103#define AUDIO_PAUSE                _IO('o', 3)
 104#define AUDIO_CONTINUE             _IO('o', 4)
 105#define AUDIO_SELECT_SOURCE        _IO('o', 5)
 106#define AUDIO_SET_MUTE             _IO('o', 6)
 107#define AUDIO_SET_AV_SYNC          _IO('o', 7)
 108#define AUDIO_SET_BYPASS_MODE      _IO('o', 8)
 109#define AUDIO_CHANNEL_SELECT       _IO('o', 9)
 110#define AUDIO_GET_STATUS           _IOR('o', 10, audio_status_t)
 111
 112#define AUDIO_GET_CAPABILITIES     _IOR('o', 11, unsigned int)
 113#define AUDIO_CLEAR_BUFFER         _IO('o',  12)
 114#define AUDIO_SET_ID               _IO('o', 13)
 115#define AUDIO_SET_MIXER            _IOW('o', 14, audio_mixer_t)
 116#define AUDIO_SET_STREAMTYPE       _IO('o', 15)
 117#define AUDIO_SET_EXT_ID           _IO('o', 16)
 118#define AUDIO_SET_ATTRIBUTES       _IOW('o', 17, audio_attributes_t)
 119#define AUDIO_SET_KARAOKE          _IOW('o', 18, audio_karaoke_t)
 120
 121/**
 122 * AUDIO_GET_PTS
 123 *
 124 * Read the 33 bit presentation time stamp as defined
 125 * in ITU T-REC-H.222.0 / ISO/IEC 13818-1.
 126 *
 127 * The PTS should belong to the currently played
 128 * frame if possible, but may also be a value close to it
 129 * like the PTS of the last decoded frame or the last PTS
 130 * extracted by the PES parser.
 131 */
 132#define AUDIO_GET_PTS              _IOR('o', 19, __u64)
 133#define AUDIO_BILINGUAL_CHANNEL_SELECT _IO('o', 20)
 134
 135#endif /* _DVBAUDIO_H_ */
 136
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