audio_output.h
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- /*****************************************************************************
- * audio_output.h : audio output interface
- *****************************************************************************
- * Copyright (C) 2002 VideoLAN
- * $Id: audio_output.h 8860 2004-09-30 16:46:37Z gbazin $
- *
- * Authors: Christophe Massiot <massiot@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 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 General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #ifndef _VLC_AUDIO_OUTPUT_H
- #define _VLC_AUDIO_OUTPUT_H 1
- #include "vlc_es.h"
- #define AOUT_FMTS_IDENTICAL( p_first, p_second ) (
- ((p_first)->i_format == (p_second)->i_format)
- && ((p_first)->i_rate == (p_second)->i_rate)
- && ((p_first)->i_physical_channels == (p_second)->i_physical_channels)
- && ((p_first)->i_original_channels == (p_second)->i_original_channels) )
- /* Check if i_rate == i_rate and i_channels == i_channels */
- #define AOUT_FMTS_SIMILAR( p_first, p_second ) (
- ((p_first)->i_rate == (p_second)->i_rate)
- && ((p_first)->i_physical_channels == (p_second)->i_physical_channels)
- && ((p_first)->i_original_channels == (p_second)->i_original_channels) )
- #ifdef WORDS_BIGENDIAN
- # define AOUT_FMT_S16_NE VLC_FOURCC('s','1','6','b')
- # define AOUT_FMT_U16_NE VLC_FOURCC('u','1','6','b')
- #else
- # define AOUT_FMT_S16_NE VLC_FOURCC('s','1','6','l')
- # define AOUT_FMT_U16_NE VLC_FOURCC('u','1','6','l')
- #endif
- #define AOUT_FMT_NON_LINEAR( p_format )
- ( ((p_format)->i_format == VLC_FOURCC('s','p','d','i'))
- || ((p_format)->i_format == VLC_FOURCC('a','5','2',' '))
- || ((p_format)->i_format == VLC_FOURCC('d','t','s',' ')) )
- /* This is heavily borrowed from libmad, by Robert Leslie <rob@mars.org> */
- /*
- * Fixed-point format: 0xABBBBBBB
- * A == whole part (sign + 3 bits)
- * B == fractional part (28 bits)
- *
- * Values are signed two's complement, so the effective range is:
- * 0x80000000 to 0x7fffffff
- * -8.0 to +7.9999999962747097015380859375
- *
- * The smallest representable value is:
- * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
- *
- * 28 bits of fractional accuracy represent about
- * 8.6 digits of decimal accuracy.
- *
- * Fixed-point numbers can be added or subtracted as normal
- * integers, but multiplication requires shifting the 64-bit result
- * from 56 fractional bits back to 28 (and rounding.)
- */
- typedef int32_t vlc_fixed_t;
- #define FIXED32_FRACBITS 28
- #define FIXED32_MIN ((vlc_fixed_t) -0x80000000L)
- #define FIXED32_MAX ((vlc_fixed_t) +0x7fffffffL)
- #define FIXED32_ONE ((vlc_fixed_t) 0x10000000)
- /*
- * Channels descriptions
- */
- /* Values available for physical and original channels */
- #define AOUT_CHAN_CENTER 0x1
- #define AOUT_CHAN_LEFT 0x2
- #define AOUT_CHAN_RIGHT 0x4
- #define AOUT_CHAN_REARCENTER 0x10
- #define AOUT_CHAN_REARLEFT 0x20
- #define AOUT_CHAN_REARRIGHT 0x40
- #define AOUT_CHAN_MIDDLELEFT 0x100
- #define AOUT_CHAN_MIDDLERIGHT 0x200
- #define AOUT_CHAN_LFE 0x1000
- /* Values available for original channels only */
- #define AOUT_CHAN_DOLBYSTEREO 0x10000
- #define AOUT_CHAN_DUALMONO 0x20000
- #define AOUT_CHAN_REVERSESTEREO 0x40000
- #define AOUT_CHAN_PHYSMASK 0xFFFF
- #define AOUT_CHAN_MAX 9
- /* Values used for the audio-device and audio-channels object variables */
- #define AOUT_VAR_MONO 1
- #define AOUT_VAR_STEREO 2
- #define AOUT_VAR_2F2R 4
- #define AOUT_VAR_3F2R 5
- #define AOUT_VAR_5_1 6
- #define AOUT_VAR_6_1 7
- #define AOUT_VAR_7_1 8
- #define AOUT_VAR_SPDIF 10
- #define AOUT_VAR_CHAN_STEREO 1
- #define AOUT_VAR_CHAN_RSTEREO 2
- #define AOUT_VAR_CHAN_LEFT 3
- #define AOUT_VAR_CHAN_RIGHT 4
- #define AOUT_VAR_CHAN_DOLBYS 5
- /*****************************************************************************
- * aout_buffer_t : audio output buffer
- *****************************************************************************/
- struct aout_buffer_t
- {
- byte_t * p_buffer;
- int i_alloc_type;
- /* i_size is the real size of the buffer (used for debug ONLY), i_nb_bytes
- * is the number of significative bytes in it. */
- size_t i_size, i_nb_bytes;
- unsigned int i_nb_samples;
- mtime_t start_date, end_date;
- struct aout_buffer_t * p_next;
- /** Private data (aout_buffer_t will disappear soon so no need for an
- * aout_buffer_sys_t type) */
- void * p_sys;
- /** This way the release can be overloaded */
- void (*pf_release)( aout_buffer_t * );
- };
- /* Size of a frame for S/PDIF output. */
- #define AOUT_SPDIF_SIZE 6144
- /* Number of samples in an A/52 frame. */
- #define A52_FRAME_NB 1536
- /*****************************************************************************
- * audio_date_t : date incrementation without long-term rounding errors
- *****************************************************************************/
- struct audio_date_t
- {
- mtime_t date;
- uint32_t i_divider;
- uint32_t i_remainder;
- };
- /*****************************************************************************
- * Prototypes
- *****************************************************************************/
- /* From common.c : */
- #define aout_New(a) __aout_New(VLC_OBJECT(a))
- VLC_EXPORT( aout_instance_t *, __aout_New, ( vlc_object_t * ) );
- VLC_EXPORT( void, aout_Delete, ( aout_instance_t * ) );
- VLC_EXPORT( void, aout_DateInit, ( audio_date_t *, uint32_t ) );
- VLC_EXPORT( void, aout_DateSet, ( audio_date_t *, mtime_t ) );
- VLC_EXPORT( void, aout_DateMove, ( audio_date_t *, mtime_t ) );
- VLC_EXPORT( mtime_t, aout_DateGet, ( const audio_date_t * ) );
- VLC_EXPORT( mtime_t, aout_DateIncrement, ( audio_date_t *, uint32_t ) );
- VLC_EXPORT( int, aout_CheckChannelReorder, ( const uint32_t *, const uint32_t *, uint32_t, int, int * ) );
- VLC_EXPORT( void, aout_ChannelReorder, ( uint8_t *, int, int, const int *, int ) );
- /* From dec.c : */
- #define aout_DecNew(a, b, c) __aout_DecNew(VLC_OBJECT(a), b, c)
- VLC_EXPORT( aout_input_t *, __aout_DecNew, ( vlc_object_t *, aout_instance_t **, audio_sample_format_t * ) );
- VLC_EXPORT( int, aout_DecDelete, ( aout_instance_t *, aout_input_t * ) );
- VLC_EXPORT( aout_buffer_t *, aout_DecNewBuffer, ( aout_instance_t *, aout_input_t *, size_t ) );
- VLC_EXPORT( void, aout_DecDeleteBuffer, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) );
- VLC_EXPORT( int, aout_DecPlay, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) );
- /* From intf.c : */
- #define aout_VolumeGet(a, b) __aout_VolumeGet(VLC_OBJECT(a), b)
- VLC_EXPORT( int, __aout_VolumeGet, ( vlc_object_t *, audio_volume_t * ) );
- #define aout_VolumeSet(a, b) __aout_VolumeSet(VLC_OBJECT(a), b)
- VLC_EXPORT( int, __aout_VolumeSet, ( vlc_object_t *, audio_volume_t ) );
- #define aout_VolumeInfos(a, b) __aout_VolumeInfos(VLC_OBJECT(a), b)
- VLC_EXPORT( int, __aout_VolumeInfos, ( vlc_object_t *, audio_volume_t * ) );
- #define aout_VolumeUp(a, b, c) __aout_VolumeUp(VLC_OBJECT(a), b, c)
- VLC_EXPORT( int, __aout_VolumeUp, ( vlc_object_t *, int, audio_volume_t * ) );
- #define aout_VolumeDown(a, b, c) __aout_VolumeDown(VLC_OBJECT(a), b, c)
- VLC_EXPORT( int, __aout_VolumeDown, ( vlc_object_t *, int, audio_volume_t * ) );
- #define aout_VolumeMute(a, b) __aout_VolumeMute(VLC_OBJECT(a), b)
- VLC_EXPORT( int, __aout_VolumeMute, ( vlc_object_t *, audio_volume_t * ) );
- VLC_EXPORT( int, aout_Restart, ( aout_instance_t * p_aout ) );
- VLC_EXPORT( int, aout_FindAndRestart, ( vlc_object_t *, const char *, vlc_value_t, vlc_value_t, void * ) );
- VLC_EXPORT( int, aout_ChannelsRestart, ( vlc_object_t *, const char *, vlc_value_t, vlc_value_t, void * ) );
- #endif /* _VLC_AUDIO_OUTPUT_H */