/***************************************************************************** * audio_output.h : audio output interface ***************************************************************************** * Copyright (C) 2002 VideoLAN * $Id$ * * 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 */