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audio.h
/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */ /* * audio.h * * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de> * & Marcus Metzler <marcus@convergence.de> * for convergence integrated media GmbH * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Lesser Public License * as published by the Free Software Foundation; either version 2.1 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * */ #ifndef _DVBAUDIO_H_ #define _DVBAUDIO_H_ #include <linux/types.h> typedef enum { AUDIO_SOURCE_DEMUX, /* Select the demux as the main source */ AUDIO_SOURCE_MEMORY /* Select internal memory as the main source */ } audio_stream_source_t; typedef enum { AUDIO_STOPPED, /* Device is stopped */ AUDIO_PLAYING, /* Device is currently playing */ AUDIO_PAUSED /* Device is paused */ } audio_play_state_t; typedef enum { AUDIO_STEREO, AUDIO_MONO_LEFT, AUDIO_MONO_RIGHT, AUDIO_MONO, AUDIO_STEREO_SWAPPED } audio_channel_select_t; typedef struct audio_mixer { unsigned int volume_left; unsigned int volume_right; // what else do we need? bass, pass-through, ... } audio_mixer_t; typedef struct audio_status { int AV_sync_state; /* sync audio and video? */ int mute_state; /* audio is muted */ audio_play_state_t play_state; /* current playback state */ audio_stream_source_t stream_source; /* current stream source */ audio_channel_select_t channel_select; /* currently selected channel */ int bypass_mode; /* pass on audio data to */ audio_mixer_t mixer_state; /* current mixer state */ } audio_status_t; /* separate decoder hardware */ typedef struct audio_karaoke { /* if Vocal1 or Vocal2 are non-zero, they get mixed */ int vocal1; /* into left and right t at 70% each */ int vocal2; /* if both, Vocal1 and Vocal2 are non-zero, Vocal1 gets*/ int melody; /* mixed into the left channel and */ /* Vocal2 into the right channel at 100% each. */ /* if Melody is non-zero, the melody channel gets mixed*/ } audio_karaoke_t; /* into left and right */ typedef __u16 audio_attributes_t; /* bits: descr. */ /* 15-13 audio coding mode (0=ac3, 2=mpeg1, 3=mpeg2ext, 4=LPCM, 6=DTS, */ /* 12 multichannel extension */ /* 11-10 audio type (0=not spec, 1=language included) */ /* 9- 8 audio application mode (0=not spec, 1=karaoke, 2=surround) */ /* 7- 6 Quantization / DRC (mpeg audio: 1=DRC exists)(lpcm: 0=16bit, */ /* 5- 4 Sample frequency fs (0=48kHz, 1=96kHz) */ /* 2- 0 number of audio channels (n+1 channels) */ /* for GET_CAPABILITIES and SET_FORMAT, the latter should only set one bit */ #define AUDIO_CAP_DTS 1 #define AUDIO_CAP_LPCM 2 #define AUDIO_CAP_MP1 4 #define AUDIO_CAP_MP2 8 #define AUDIO_CAP_MP3 16 #define AUDIO_CAP_AAC 32 #define AUDIO_CAP_OGG 64 #define AUDIO_CAP_SDDS 128 #define AUDIO_CAP_AC3 256 #define AUDIO_STOP _IO('o', 1) #define AUDIO_PLAY _IO('o', 2) #define AUDIO_PAUSE _IO('o', 3) #define AUDIO_CONTINUE _IO('o', 4) #define AUDIO_SELECT_SOURCE _IO('o', 5) #define AUDIO_SET_MUTE _IO('o', 6) #define AUDIO_SET_AV_SYNC _IO('o', 7) #define AUDIO_SET_BYPASS_MODE _IO('o', 8) #define AUDIO_CHANNEL_SELECT _IO('o', 9) #define AUDIO_GET_STATUS _IOR('o', 10, audio_status_t) #define AUDIO_GET_CAPABILITIES _IOR('o', 11, unsigned int) #define AUDIO_CLEAR_BUFFER _IO('o', 12) #define AUDIO_SET_ID _IO('o', 13) #define AUDIO_SET_MIXER _IOW('o', 14, audio_mixer_t) #define AUDIO_SET_STREAMTYPE _IO('o', 15) #define AUDIO_SET_EXT_ID _IO('o', 16) #define AUDIO_SET_ATTRIBUTES _IOW('o', 17, audio_attributes_t) #define AUDIO_SET_KARAOKE _IOW('o', 18, audio_karaoke_t) /** * AUDIO_GET_PTS * * Read the 33 bit presentation time stamp as defined * in ITU T-REC-H.222.0 / ISO/IEC 13818-1. * * The PTS should belong to the currently played * frame if possible, but may also be a value close to it * like the PTS of the last decoded frame or the last PTS * extracted by the PES parser. */ #define AUDIO_GET_PTS _IOR('o', 19, __u64) #define AUDIO_BILINGUAL_CHANNEL_SELECT _IO('o', 20) #endif /* _DVBAUDIO_H_ */
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