X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=include%2Faudio_output.h;h=eaab48c8c51f1d1da05a0b1cb8b0c444d80f5185;hb=a5dcac2826c1f55cd4ebd610632cbd3ddf3b707b;hp=eb3430f1308219350610f6b06aa178542744d030;hpb=cc0f0bb6fd28d5ed3463be4a227990cbae8a849f;p=vlc diff --git a/include/audio_output.h b/include/audio_output.h index eb3430f130..eaab48c8c5 100644 --- a/include/audio_output.h +++ b/include/audio_output.h @@ -1,16 +1,16 @@ /***************************************************************************** - * audio_output.h : audio output thread interface + * audio_output.h : audio output interface ***************************************************************************** - * Copyright (C) 1999, 2000 VideoLAN - * $Id: audio_output.h,v 1.39 2001/12/30 07:09:54 sam Exp $ + * Copyright (C) 2002 VideoLAN + * $Id: audio_output.h,v 1.82 2003/08/14 11:47:32 gbazin Exp $ * - * Authors: Michel Kaempf + * Authors: Christophe Massiot * * 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 @@ -22,204 +22,189 @@ *****************************************************************************/ /***************************************************************************** - * aout_bank_t, p_aout_bank (global variable) + * audio_sample_format_t ***************************************************************************** - * This global variable is accessed by any function using the audio output. + * This structure defines a format for audio samples. *****************************************************************************/ -typedef struct aout_bank_s +struct audio_sample_format_t { - /* Array to all the audio outputs */ - struct aout_thread_s *pp_aout[ AOUT_MAX_THREADS ]; + 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 + */ +}; - int i_count; - vlc_mutex_t lock; /* Global lock */ +#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) ) -} aout_bank_t; +/* 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) ) -#ifndef PLUGIN -extern aout_bank_t *p_aout_bank; +#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 p_aout_bank (p_symbols->p_aout_bank) +# define AOUT_FMT_S16_NE VLC_FOURCC('s','1','6','l') +# define AOUT_FMT_U16_NE VLC_FOURCC('u','1','6','l') #endif -/***************************************************************************** - * aout_increment_t - ***************************************************************************** - * This structure is used to keep the progression of an index up-to-date, in - * order to avoid rounding problems and heavy computations, as the function - * that handles this structure only uses additions. - *****************************************************************************/ -typedef struct aout_increment_s -{ - /* The remainder is used to keep track of the fractional part of the - * index. */ - long l_remainder; - - /* - * The increment structure is initialized with the result of an euclidean - * division : - * - * l_euclidean_numerator l_euclidean_remainder - * ----------------------- = l_euclidean_integer + ----------------------- - * l_euclidean_denominator l_euclidean_denominator - * - */ - long l_euclidean_integer; - long l_euclidean_remainder; - long l_euclidean_denominator; +#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',' ')) ) -} aout_increment_t; +/* 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 + +/* 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_fifo_t + * aout_buffer_t : audio output buffer *****************************************************************************/ -typedef struct aout_fifo_s +struct aout_buffer_t { - /* See the fifo types below */ - int i_type; - boolean_t b_die; - int i_fifo; /* Just to keep track of the fifo index */ - - int i_channels; - boolean_t b_stereo; - long l_rate; - - vlc_mutex_t data_lock; - vlc_cond_t data_wait; - - long l_frame_size; - void * buffer; - mtime_t * date; - /* The start frame is the first frame in the buffer that contains decoded - * audio data. It it also the first frame in the current timestamped frame - * area, ie the first dated frame in the decoded part of the buffer. :-p */ - long l_start_frame; - boolean_t b_start_frame; - /* The next frame is the end frame of the current timestamped frame area, - * ie the first dated frame after the start frame. */ - long l_next_frame; - boolean_t b_next_frame; - /* The end frame is the first frame, after the start frame, that doesn't - * contain decoded audio data. That's why the end frame is the first frame - * where the audio decoder can store its decoded audio frames. */ - long l_end_frame; - - long l_unit; - aout_increment_t unit_increment; - /* The following variable is used to store the number of remaining audio - * units in the current timestamped frame area. */ - long l_units; - -} aout_fifo_t; - -#define AOUT_FIFO_ISEMPTY( fifo ) \ - ( (fifo).l_end_frame == (fifo).l_start_frame ) - -#define AOUT_FIFO_ISFULL( fifo ) \ - ( ((((fifo).l_end_frame + 1) - (fifo).l_start_frame) & AOUT_FIFO_SIZE) == 0 ) - -#define AOUT_EMPTY_FIFO 0 -#define AOUT_INTF_MONO_FIFO 1 -#define AOUT_INTF_STEREO_FIFO 2 -#define AOUT_ADEC_MONO_FIFO 3 -#define AOUT_ADEC_STEREO_FIFO 4 -#define AOUT_ADEC_SPDIF_FIFO 5 + 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; -/***************************************************************************** - * aout_thread_t : audio output thread descriptor - *****************************************************************************/ -typedef struct aout_thread_s -{ - vlc_thread_t thread_id; - boolean_t b_die; - boolean_t b_active; - - vlc_mutex_t fifos_lock; - aout_fifo_t fifo[ AOUT_MAX_FIFOS ]; - - /* Plugin used and shortcuts to access its capabilities */ - struct module_s * p_module; - int ( *pf_open ) ( p_aout_thread_t ); - int ( *pf_setformat ) ( p_aout_thread_t ); - long ( *pf_getbufinfo ) ( p_aout_thread_t, long ); - void ( *pf_play ) ( p_aout_thread_t, byte_t *, int ); - void ( *pf_close ) ( p_aout_thread_t ); - - void * buffer; - /* The s32 buffer is used to mix all the audio fifos together before - * converting them and storing them in the audio output buffer */ - s32 * s32_buffer; - - /* The size of the audio output buffer is kept in audio units, as this is - * the only unit that is common with every audio decoder and audio fifo */ - long l_units; - long l_msleep; - - /* date is the moment where the first audio unit of the output buffer - * will be played */ - mtime_t date; - - /* Path to the audio output device (default is set to "/dev/dsp") */ - char * psz_device; - int i_fd; - - /* The current volume */ - int i_volume; - int i_savedvolume; - /* Format of the audio output samples */ - int i_format; - /* Number of channels */ - int i_channels; - /* Mono or Stereo sound */ - boolean_t b_stereo; - /* Rate and gain of the audio output sound (in Hz) */ - long l_rate; - long l_gain; - int i_latency; - - /* there might be some useful private structure, such as audio_buf_info - * for the OSS output */ - p_aout_sys_t p_sys; - -} aout_thread_t; - -/* Those are from but are needed because of formats - * on other platforms */ -#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_AC3 0x00000400 /* Dolby Digital AC3 */ + struct aout_buffer_t * p_next; +}; -#ifdef WORDS_BIGENDIAN -#define AOUT_FMT_S16_NE AOUT_FMT_S16_BE -#else -#define AOUT_FMT_S16_NE AOUT_FMT_S16_LE -#endif +/* Size of a frame for S/PDIF output. */ +#define AOUT_SPDIF_SIZE 6144 -/* Number of samples in an AC3 frame */ -#define AC3_FRAME_SIZE 1536 +/* Number of samples in an A/52 frame. */ +#define A52_FRAME_NB 1536 -/* Size of a frame for spdif output */ -#define SPDIF_FRAME_SIZE 6144 +/***************************************************************************** + * 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 *****************************************************************************/ -#ifndef PLUGIN -void aout_InitBank ( void ); -void aout_EndBank ( void ); - -aout_thread_t * aout_CreateThread ( int *pi_status ); -void aout_DestroyThread ( aout_thread_t *, int * ); - -aout_fifo_t * aout_CreateFifo ( int, int, long, long, long, void * ); -void aout_DestroyFifo ( aout_fifo_t *p_fifo ); -void aout_FreeFifo ( aout_fifo_t *p_fifo ); -#else -# define aout_CreateFifo p_symbols->aout_CreateFifo -# define aout_DestroyFifo p_symbols->aout_DestroyFifo -#endif +/* 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( 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 * ) );