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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 
30 typedef 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 
36 typedef 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 
43 typedef 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 
52 typedef 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 
59 typedef 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_ */
100