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 #ifdef __KERNEL__
28 #include <linux/types.h>
29 #else
30 #include <stdint.h>
31 #endif
32
33
34 typedef enum {
35 AUDIO_SOURCE_DEMUX, /* Select the demux as the main source */
36 AUDIO_SOURCE_MEMORY /* Select internal memory as the main source */
37 } audio_stream_source_t;
38
39
40 typedef enum {
41 AUDIO_STOPPED, /* Device is stopped */
42 AUDIO_PLAYING, /* Device is currently playing */
43 AUDIO_PAUSED /* Device is paused */
44 } audio_play_state_t;
45
46
47 typedef enum {
48 AUDIO_STEREO,
49 AUDIO_MONO_LEFT,
50 AUDIO_MONO_RIGHT,
51 AUDIO_MONO,
52 AUDIO_STEREO_SWAPPED
53 } audio_channel_select_t;
54
55
56 typedef struct audio_mixer {
57 unsigned int volume_left;
58 unsigned int volume_right;
59 // what else do we need? bass, pass-through, ...
60 } audio_mixer_t;
61
62
63 typedef struct audio_status {
64 int AV_sync_state; /* sync audio and video? */
65 int mute_state; /* audio is muted */
66 audio_play_state_t play_state; /* current playback state */
67 audio_stream_source_t stream_source; /* current stream source */
68 audio_channel_select_t channel_select; /* currently selected channel */
69 int bypass_mode; /* pass on audio data to */
70 audio_mixer_t mixer_state; /* current mixer state */
71 } audio_status_t; /* separate decoder hardware */
72
73
74 typedef
75 struct audio_karaoke{ /* if Vocal1 or Vocal2 are non-zero, they get mixed */
76 int vocal1; /* into left and right t at 70% each */
77 int vocal2; /* if both, Vocal1 and Vocal2 are non-zero, Vocal1 gets*/
78 int melody; /* mixed into the left channel and */
79 /* Vocal2 into the right channel at 100% each. */
80 /* if Melody is non-zero, the melody channel gets mixed*/
81 } audio_karaoke_t; /* into left and right */
82
83
84 typedef uint16_t audio_attributes_t;
85 /* bits: descr. */
86 /* 15-13 audio coding mode (0=ac3, 2=mpeg1, 3=mpeg2ext, 4=LPCM, 6=DTS, */
87 /* 12 multichannel extension */
88 /* 11-10 audio type (0=not spec, 1=language included) */
89 /* 9- 8 audio application mode (0=not spec, 1=karaoke, 2=surround) */
90 /* 7- 6 Quantization / DRC (mpeg audio: 1=DRC exists)(lpcm: 0=16bit, */
91 /* 5- 4 Sample frequency fs (0=48kHz, 1=96kHz) */
92 /* 2- 0 number of audio channels (n+1 channels) */
93
94
95 /* for GET_CAPABILITIES and SET_FORMAT, the latter should only set one bit */
96 #define AUDIO_CAP_DTS 1
97 #define AUDIO_CAP_LPCM 2
98 #define AUDIO_CAP_MP1 4
99 #define AUDIO_CAP_MP2 8
100 #define AUDIO_CAP_MP3 16
101 #define AUDIO_CAP_AAC 32
102 #define AUDIO_CAP_OGG 64
103 #define AUDIO_CAP_SDDS 128
104 #define AUDIO_CAP_AC3 256
105
106 #define AUDIO_STOP _IO('o', 1)
107 #define AUDIO_PLAY _IO('o', 2)
108 #define AUDIO_PAUSE _IO('o', 3)
109 #define AUDIO_CONTINUE _IO('o', 4)
110 #define AUDIO_SELECT_SOURCE _IO('o', 5)
111 #define AUDIO_SET_MUTE _IO('o', 6)
112 #define AUDIO_SET_AV_SYNC _IO('o', 7)
113 #define AUDIO_SET_BYPASS_MODE _IO('o', 8)
114 #define AUDIO_CHANNEL_SELECT _IO('o', 9)
115 #define AUDIO_GET_STATUS _IOR('o', 10, audio_status_t)
116
117 #define AUDIO_GET_CAPABILITIES _IOR('o', 11, unsigned int)
118 #define AUDIO_CLEAR_BUFFER _IO('o', 12)
119 #define AUDIO_SET_ID _IO('o', 13)
120 #define AUDIO_SET_MIXER _IOW('o', 14, audio_mixer_t)
121 #define AUDIO_SET_STREAMTYPE _IO('o', 15)
122 #define AUDIO_SET_EXT_ID _IO('o', 16)
123 #define AUDIO_SET_ATTRIBUTES _IOW('o', 17, audio_attributes_t)
124 #define AUDIO_SET_KARAOKE _IOW('o', 18, audio_karaoke_t)
125
126 /**
127 * AUDIO_GET_PTS
128 *
129 * Read the 33 bit presentation time stamp as defined
130 * in ITU T-REC-H.222.0 / ISO/IEC 13818-1.
131 *
132 * The PTS should belong to the currently played
133 * frame if possible, but may also be a value close to it
134 * like the PTS of the last decoded frame or the last PTS
135 * extracted by the PES parser.
136 */
137 #define AUDIO_GET_PTS _IOR('o', 19, __u64)
138 #define AUDIO_BILINGUAL_CHANNEL_SELECT _IO('o', 20)
139
140 #endif /* _DVBAUDIO_H_ */
141
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