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 
29 typedef 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 
35 typedef 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 
42 typedef 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 
51 typedef 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 
58 typedef 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 
69 typedef
70 struct 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 
79 typedef __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