+++ /dev/null
-.. -*- coding: utf-8; mode: rst -*-
-
-file: audio.h
-=============
-
-.. code-block:: c
-
- /*
- * 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_ */