1 /* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */ 2 /* 3 * audio.h 4 * 5 * Copyright (C) 2000 Ralph Metzler <ralph (at) convergence.de> 6 * & Marcus Metzler <marcus (at) 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
