1 /* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
2 /*
3  * audio.h - DEPRECATED MPEG-TS audio decoder API
4  *
5  * NOTE: should not be used on future drivers
6  *
7  * Copyright (C) 2000 Ralph  Metzler <ralph@convergence.de>
8  *                  & Marcus Metzler <marcus@convergence.de>
9  *                    for convergence integrated media GmbH
10  *
11  * This program is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU General Lesser Public License
13  * as published by the Free Software Foundation; either version 2.1
14  * of the License, or (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
24  *
25  */
26 
27 #ifndef _DVBAUDIO_H_
28 #define _DVBAUDIO_H_
29 
30 #include <linux/types.h>
31 
32 typedef enum {
33 	AUDIO_SOURCE_DEMUX, /* Select the demux as the main source */
34 	AUDIO_SOURCE_MEMORY /* Select internal memory as the main source */
35 } audio_stream_source_t;
36 
37 
38 typedef enum {
39 	AUDIO_STOPPED,      /* Device is stopped */
40 	AUDIO_PLAYING,      /* Device is currently playing */
41 	AUDIO_PAUSED        /* Device is paused */
42 } audio_play_state_t;
43 
44 
45 typedef enum {
46 	AUDIO_STEREO,
47 	AUDIO_MONO_LEFT,
48 	AUDIO_MONO_RIGHT,
49 	AUDIO_MONO,
50 	AUDIO_STEREO_SWAPPED
51 } audio_channel_select_t;
52 
53 
54 typedef 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 
61 typedef 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 
72 /* for GET_CAPABILITIES and SET_FORMAT, the latter should only set one bit */
73 #define AUDIO_CAP_DTS    1
74 #define AUDIO_CAP_LPCM   2
75 #define AUDIO_CAP_MP1    4
76 #define AUDIO_CAP_MP2    8
77 #define AUDIO_CAP_MP3   16
78 #define AUDIO_CAP_AAC   32
79 #define AUDIO_CAP_OGG   64
80 #define AUDIO_CAP_SDDS 128
81 #define AUDIO_CAP_AC3  256
82 
83 #define AUDIO_STOP                 _IO('o', 1)
84 #define AUDIO_PLAY                 _IO('o', 2)
85 #define AUDIO_PAUSE                _IO('o', 3)
86 #define AUDIO_CONTINUE             _IO('o', 4)
87 #define AUDIO_SELECT_SOURCE        _IO('o', 5)
88 #define AUDIO_SET_MUTE             _IO('o', 6)
89 #define AUDIO_SET_AV_SYNC          _IO('o', 7)
90 #define AUDIO_SET_BYPASS_MODE      _IO('o', 8)
91 #define AUDIO_CHANNEL_SELECT       _IO('o', 9)
92 #define AUDIO_GET_STATUS           _IOR('o', 10, audio_status_t)
93 
94 #define AUDIO_GET_CAPABILITIES     _IOR('o', 11, unsigned int)
95 #define AUDIO_CLEAR_BUFFER         _IO('o',  12)
96 #define AUDIO_SET_ID               _IO('o', 13)
97 #define AUDIO_SET_MIXER            _IOW('o', 14, audio_mixer_t)
98 #define AUDIO_SET_STREAMTYPE       _IO('o', 15)
99 #define AUDIO_BILINGUAL_CHANNEL_SELECT _IO('o', 20)
100 
101 #endif /* _DVBAUDIO_H_ */
102