X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=include%2Faudio_output.h;h=88b3f787c5446e8a9f283f376f0ead4c5403a60b;hb=252b0eb27c359fd0a3e9fe421d4fce8aa1163864;hp=a6fc838a223eeda1defd89a08fa6aa08d3520d5f;hpb=7689bc9224e3d9516c56126980cb68eadca6fcaf;p=vlc diff --git a/include/audio_output.h b/include/audio_output.h index a6fc838a22..88b3f787c5 100644 --- a/include/audio_output.h +++ b/include/audio_output.h @@ -2,7 +2,7 @@ * audio_output.h : audio output interface ***************************************************************************** * Copyright (C) 2002 VideoLAN - * $Id: audio_output.h,v 1.53 2002/08/08 00:35:10 sam Exp $ + * $Id: audio_output.h,v 1.79 2003/02/11 11:16:04 massiot Exp $ * * Authors: Christophe Massiot * @@ -10,7 +10,7 @@ * 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 @@ -28,38 +28,101 @@ *****************************************************************************/ struct audio_sample_format_t { - int i_format; - int i_rate; - int i_channels; + vlc_fourcc_t i_format; + unsigned int i_rate; + /* Describes the channels configuration of the samples (ie. number of + * channels which are available in the buffer, and positions). */ + uint32_t i_physical_channels; + /* Describes from which original channels, before downmixing, the + * buffer is derived. */ + uint32_t i_original_channels; + /* Optional - for A/52, SPDIF and DTS types : */ + /* Bytes used by one compressed frame, depends on bitrate. */ + unsigned int i_bytes_per_frame; + /* Number of sampleframes contained in one compressed frame. */ + unsigned int i_frame_length; + /* Please note that it may be completely arbitrary - buffers are not + * obliged to contain a integral number of so-called "frames". It's + * just here for the division : + * buffer_size = i_nb_samples * i_bytes_per_frame / i_frame_length + */ }; -#define AOUT_FMT_MU_LAW 0x00000001 -#define AOUT_FMT_A_LAW 0x00000002 -#define AOUT_FMT_IMA_ADPCM 0x00000004 -#define AOUT_FMT_U8 0x00000008 -#define AOUT_FMT_S16_LE 0x00000010 /* Little endian signed 16 */ -#define AOUT_FMT_S16_BE 0x00000020 /* Big endian signed 16 */ -#define AOUT_FMT_S8 0x00000040 -#define AOUT_FMT_U16_LE 0x00000080 /* Little endian U16 */ -#define AOUT_FMT_U16_BE 0x00000100 /* Big endian U16 */ -#define AOUT_FMT_A52 0x00000400 /* ATSC A/52 (for SP/DIF) */ -#define AOUT_FMT_FLOAT32 0x00000800 -#define AOUT_FMT_FIXED32 0x00001000 - #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_channels == p_second->i_channels \ - || p_first->i_channels == -1 || p_second->i_channels == -1) ) + ((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 AOUT_FMT_S16_BE -# define AOUT_FMT_U16_NE AOUT_FMT_U16_BE +# 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 AOUT_FMT_S16_LE -# define AOUT_FMT_U16_NE AOUT_FMT_U16_LE +# 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 */ +/* + * 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 + + /***************************************************************************** * aout_buffer_t : audio output buffer *****************************************************************************/ @@ -67,30 +130,66 @@ struct aout_buffer_t { byte_t * p_buffer; int i_alloc_type; - size_t i_size; - int i_nb_samples; + /* 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; }; +/* 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 audio_output.c : */ -#define aout_NewInstance(a) __aout_NewInstance(VLC_OBJECT(a)) -VLC_EXPORT( aout_instance_t *, __aout_NewInstance, ( vlc_object_t * ) ); -VLC_EXPORT( void, aout_DeleteInstance, ( aout_instance_t * ) ); -VLC_EXPORT( aout_buffer_t *, aout_BufferNew, ( aout_instance_t *, aout_input_t *, size_t ) ); -VLC_EXPORT( void, aout_BufferDelete, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) ); -VLC_EXPORT( void, aout_BufferPlay, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) ); -VLC_EXPORT( int, aout_FormatToBytes, ( audio_sample_format_t * p_format ) ); - -/* From input.c : */ -#define aout_InputNew(a,b,c) __aout_InputNew(VLC_OBJECT(a),b,c) -VLC_EXPORT( aout_input_t *, __aout_InputNew, ( vlc_object_t *, aout_instance_t **, audio_sample_format_t * ) ); -VLC_EXPORT( void, aout_InputDelete, ( aout_instance_t *, aout_input_t * ) ); - -/* From output.c : */ -VLC_EXPORT( aout_buffer_t *, aout_OutputNextBuffer, ( aout_instance_t *, mtime_t ) ); +/* 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 ) ); + +/* 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( void, aout_FindAndRestart, ( vlc_object_t * p_this ) ); +VLC_EXPORT( int, aout_ChannelsRestart, ( vlc_object_t *, const char *, vlc_value_t, vlc_value_t, void * ) );