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