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001: /*
002:  * audio.h
003:  *
004:  * Copyright (C) 2000 Ralph  Metzler <ralph@convergence.de>
005:  *                  & Marcus Metzler <marcus@convergence.de>
006:  *                    for convergence integrated media GmbH
007:  *
008:  * This program is free software; you can redistribute it and/or
009:  * modify it under the terms of the GNU General Lesser Public License
010:  * as published by the Free Software Foundation; either version 2.1
011:  * of the License, or (at your option) any later version.
012:  *
013:  * This program is distributed in the hope that it will be useful,
014:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
015:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
016:  * GNU General Public License for more details.
017:  *
018:  * You should have received a copy of the GNU Lesser General Public License
019:  * along with this program; if not, write to the Free Software
020:  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
021:  *
022:  */
023: 
024: #ifndef _DVBAUDIO_H_
025: #define _DVBAUDIO_H_
026: 
027: #include <linux/types.h>
028: 
029: typedef enum {
030:         AUDIO_SOURCE_DEMUX, /* Select the demux as the main source */
031:         AUDIO_SOURCE_MEMORY /* Select internal memory as the main source */
032: } audio_stream_source_t;
033: 
034: 
035: typedef enum {
036:         AUDIO_STOPPED,      /* Device is stopped */
037:         AUDIO_PLAYING,      /* Device is currently playing */
038:         AUDIO_PAUSED        /* Device is paused */
039: } audio_play_state_t;
040: 
041: 
042: typedef enum {
043:         AUDIO_STEREO,
044:         AUDIO_MONO_LEFT,
045:         AUDIO_MONO_RIGHT,
046:         AUDIO_MONO,
047:         AUDIO_STEREO_SWAPPED
048: } audio_channel_select_t;
049: 
050: 
051: typedef struct audio_mixer {
052:         unsigned int volume_left;
053:         unsigned int volume_right;
054:   // what else do we need? bass, pass-through, ...
055: } audio_mixer_t;
056: 
057: 
058: typedef struct audio_status {
059:         int                    AV_sync_state;  /* sync audio and video? */
060:         int                    mute_state;     /* audio is muted */
061:         audio_play_state_t     play_state;     /* current playback state */
062:         audio_stream_source_t  stream_source;  /* current stream source */
063:         audio_channel_select_t channel_select; /* currently selected channel */
064:         int                    bypass_mode;    /* pass on audio data to */
065:         audio_mixer_t          mixer_state;    /* current mixer state */
066: } audio_status_t;                              /* separate decoder hardware */
067: 
068: 
069: typedef
070: struct audio_karaoke {  /* if Vocal1 or Vocal2 are non-zero, they get mixed  */
071:         int vocal1;    /* into left and right t at 70% each */
072:         int vocal2;    /* if both, Vocal1 and Vocal2 are non-zero, Vocal1 gets*/
073:         int melody;    /* mixed into the left channel and */
074:                        /* Vocal2 into the right channel at 100% each. */
075:                        /* if Melody is non-zero, the melody channel gets mixed*/
076: } audio_karaoke_t;     /* into left and right  */
077: 
078: 
079: typedef __u16 audio_attributes_t;
080: /*   bits: descr. */
081: /*   15-13 audio coding mode (0=ac3, 2=mpeg1, 3=mpeg2ext, 4=LPCM, 6=DTS, */
082: /*   12    multichannel extension */
083: /*   11-10 audio type (0=not spec, 1=language included) */
084: /*    9- 8 audio application mode (0=not spec, 1=karaoke, 2=surround) */
085: /*    7- 6 Quantization / DRC (mpeg audio: 1=DRC exists)(lpcm: 0=16bit,  */
086: /*    5- 4 Sample frequency fs (0=48kHz, 1=96kHz) */
087: /*    2- 0 number of audio channels (n+1 channels) */
088: 
089: 
090: /* for GET_CAPABILITIES and SET_FORMAT, the latter should only set one bit */
091: #define AUDIO_CAP_DTS    1
092: #define AUDIO_CAP_LPCM   2
093: #define AUDIO_CAP_MP1    4
094: #define AUDIO_CAP_MP2    8
095: #define AUDIO_CAP_MP3   16
096: #define AUDIO_CAP_AAC   32
097: #define AUDIO_CAP_OGG   64
098: #define AUDIO_CAP_SDDS 128
099: #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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