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1/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
2/*
3 * audio.h
4 *
5 * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de>
6 * & Marcus Metzler <marcus@convergence.de>
7 * for convergence integrated media GmbH
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Lesser Public License
11 * as published by the Free Software Foundation; either version 2.1
12 * of the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 *
23 */
24
25#ifndef _DVBAUDIO_H_
26#define _DVBAUDIO_H_
27
28#include <linux/types.h>
29
30typedef enum {
31 AUDIO_SOURCE_DEMUX, /* Select the demux as the main source */
32 AUDIO_SOURCE_MEMORY /* Select internal memory as the main source */
33} audio_stream_source_t;
34
35
36typedef enum {
37 AUDIO_STOPPED, /* Device is stopped */
38 AUDIO_PLAYING, /* Device is currently playing */
39 AUDIO_PAUSED /* Device is paused */
40} audio_play_state_t;
41
42
43typedef enum {
44 AUDIO_STEREO,
45 AUDIO_MONO_LEFT,
46 AUDIO_MONO_RIGHT,
47 AUDIO_MONO,
48 AUDIO_STEREO_SWAPPED
49} audio_channel_select_t;
50
51
52typedef struct audio_mixer {
53 unsigned int volume_left;
54 unsigned int volume_right;
55 // what else do we need? bass, pass-through, ...
56} audio_mixer_t;
57
58
59typedef struct audio_status {
60 int AV_sync_state; /* sync audio and video? */
61 int mute_state; /* audio is muted */
62 audio_play_state_t play_state; /* current playback state */
63 audio_stream_source_t stream_source; /* current stream source */
64 audio_channel_select_t channel_select; /* currently selected channel */
65 int bypass_mode; /* pass on audio data to */
66 audio_mixer_t mixer_state; /* current mixer state */
67} audio_status_t; /* separate decoder hardware */
68
69
70/* for GET_CAPABILITIES and SET_FORMAT, the latter should only set one bit */
71#define AUDIO_CAP_DTS 1
72#define AUDIO_CAP_LPCM 2
73#define AUDIO_CAP_MP1 4
74#define AUDIO_CAP_MP2 8
75#define AUDIO_CAP_MP3 16
76#define AUDIO_CAP_AAC 32
77#define AUDIO_CAP_OGG 64
78#define AUDIO_CAP_SDDS 128
79#define AUDIO_CAP_AC3 256
80
81#define AUDIO_STOP _IO('o', 1)
82#define AUDIO_PLAY _IO('o', 2)
83#define AUDIO_PAUSE _IO('o', 3)
84#define AUDIO_CONTINUE _IO('o', 4)
85#define AUDIO_SELECT_SOURCE _IO('o', 5)
86#define AUDIO_SET_MUTE _IO('o', 6)
87#define AUDIO_SET_AV_SYNC _IO('o', 7)
88#define AUDIO_SET_BYPASS_MODE _IO('o', 8)
89#define AUDIO_CHANNEL_SELECT _IO('o', 9)
90#define AUDIO_GET_STATUS _IOR('o', 10, audio_status_t)
91
92#define AUDIO_GET_CAPABILITIES _IOR('o', 11, unsigned int)
93#define AUDIO_CLEAR_BUFFER _IO('o', 12)
94#define AUDIO_SET_ID _IO('o', 13)
95#define AUDIO_SET_MIXER _IOW('o', 14, audio_mixer_t)
96#define AUDIO_SET_STREAMTYPE _IO('o', 15)
97#define AUDIO_BILINGUAL_CHANNEL_SELECT _IO('o', 20)
98
99#endif /* _DVBAUDIO_H_ */