mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-12 13:44:56 +02:00
26ee312a6f
our optimized IDCT, and MMX IDCT. . cosmetic changes for modules (pf_* instead of p_*) . fixes to the BeOS and dummy modules WARNING: a new directory has been added, which means you have to use `cvs update -dP' to update ; files have been removed , which means you either have to run `make distclean' or remove the .deps directory, and the configure script has changed, which means you have to run it again. Don't complain before having checked this :) Note about the IDCT modules: there is no way to choose the one we use, but you may remove the module in lib/ to prevent it from being loaded. The preference order is : MMX, Optimized, Classic.
210 lines
8.2 KiB
C
210 lines
8.2 KiB
C
/*****************************************************************************
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* audio_output.h : audio output thread interface
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*****************************************************************************
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* Copyright (C) 1999, 2000 VideoLAN
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*
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* Authors:
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* Michel Kaempf <maxx@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Required headers:
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* - "common.h" ( boolean_t )
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* - "mtime.h" ( mtime_t )
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* - "threads.h" ( vlc_thread_t )
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*****************************************************************************/
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/* TODO :
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*
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* - Créer un flag destroy dans les fifos audio pour indiquer au thread audio
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* qu'il peut libérer la mémoire occupée par le buffer de la fifo lorsqu'il
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* le désire (fin du son ou fin du thread)
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*
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*/
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/*
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* Macros
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*/
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#define AOUT_FIFO_ISEMPTY( fifo ) ( (fifo).l_end_frame == (fifo).i_start_frame )
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#define AOUT_FIFO_ISFULL( fifo ) ( ((((fifo).l_end_frame + 1) - (fifo).l_start_frame) & AOUT_FIFO_SIZE) == 0 )
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/*****************************************************************************
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* aout_increment_t
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*****************************************************************************
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* This structure is used to keep the progression of an index up-to-date, in
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* order to avoid rounding problems and heavy computations, as the function
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* that handles this structure only uses additions.
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*****************************************************************************/
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typedef struct aout_increment_s
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{
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/* The remainder is used to keep track of the fractional part of the
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* index. */
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long l_remainder;
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/*
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* The increment structure is initialized with the result of an euclidean
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* division :
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*
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* l_euclidean_numerator l_euclidean_remainder
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* ----------------------- = l_euclidean_integer + -----------------------
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* l_euclidean_denominator l_euclidean_denominator
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*
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*/
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long l_euclidean_integer;
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long l_euclidean_remainder;
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long l_euclidean_denominator;
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} aout_increment_t;
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/*****************************************************************************
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* aout_fifo_t
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*****************************************************************************/
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typedef struct aout_fifo_s
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{
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/* See the fifo types below */
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int i_type;
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boolean_t b_die;
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int i_channels;
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boolean_t b_stereo;
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long l_rate;
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vlc_mutex_t data_lock;
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vlc_cond_t data_wait;
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long l_frame_size;
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void * buffer;
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mtime_t * date;
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/* The start frame is the first frame in the buffer that contains decoded
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* audio data. It it also the first frame in the current timestamped frame
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* area, ie the first dated frame in the decoded part of the buffer. :-p */
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long l_start_frame;
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boolean_t b_start_frame;
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/* The next frame is the end frame of the current timestamped frame area,
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* ie the first dated frame after the start frame. */
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long l_next_frame;
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boolean_t b_next_frame;
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/* The end frame is the first frame, after the start frame, that doesn't
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* contain decoded audio data. That's why the end frame is the first frame
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* where the audio decoder can store its decoded audio frames. */
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long l_end_frame;
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long l_unit;
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aout_increment_t unit_increment;
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/* The following variable is used to store the number of remaining audio
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* units in the current timestamped frame area. */
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long l_units;
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} aout_fifo_t;
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#define AOUT_EMPTY_FIFO 0
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#define AOUT_INTF_MONO_FIFO 1
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#define AOUT_INTF_STEREO_FIFO 2
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#define AOUT_ADEC_MONO_FIFO 3
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#define AOUT_ADEC_STEREO_FIFO 4
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/*****************************************************************************
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* aout_thread_t : audio output thread descriptor
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*****************************************************************************/
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typedef int (aout_open_t) ( p_aout_thread_t p_aout );
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typedef int (aout_setformat_t) ( p_aout_thread_t p_aout );
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typedef long (aout_getbufinfo_t) ( p_aout_thread_t p_aout,
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long l_buffer_limit );
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typedef void (aout_play_t) ( p_aout_thread_t p_aout,
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byte_t *buffer, int i_size );
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typedef void (aout_close_t) ( p_aout_thread_t p_aout );
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typedef struct aout_thread_s
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{
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vlc_thread_t thread_id;
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boolean_t b_die;
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boolean_t b_active;
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vlc_mutex_t fifos_lock;
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aout_fifo_t fifo[ AOUT_MAX_FIFOS ];
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/* Plugin used and shortcuts to access its capabilities */
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struct module_s * p_module;
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aout_open_t * pf_open;
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aout_setformat_t * pf_setformat;
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aout_getbufinfo_t * pf_getbufinfo;
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aout_play_t * pf_play;
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aout_close_t * pf_close;
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void * buffer;
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/* The s32 buffer is used to mix all the audio fifos together before
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* converting them and storing them in the audio output buffer */
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s32 * s32_buffer;
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/* The size of the audio output buffer is kept in audio units, as this is
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* the only unit that is common with every audio decoder and audio fifo */
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long l_units;
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long l_msleep;
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/* date is the moment where the first audio unit of the output buffer
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* will be played */
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mtime_t date;
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/* Path to the audio output device (default is set to "/dev/dsp") */
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char * psz_device;
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int i_fd;
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/* Format of the audio output samples */
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int i_format;
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/* Number of channels */
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int i_channels;
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/* Mono or Stereo sound */
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boolean_t b_stereo;
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/* Rate and gain of the audio output sound (in Hz) */
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long l_rate;
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long l_gain;
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/* there might be some useful private structure, such as audio_buf_info
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* for the OSS output */
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p_aout_sys_t p_sys;
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/* there is the current volume */
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int vol;
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} aout_thread_t;
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/* Those are from <linux/soundcard.h> but are needed because of formats
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* on other platforms */
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#define AOUT_FMT_U8 0x00000008
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#define AOUT_FMT_S16_LE 0x00000010 /* Little endian signed 16 */
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#define AOUT_FMT_S16_BE 0x00000020 /* Big endian signed 16 */
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#define AOUT_FMT_S8 0x00000040
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#define AOUT_FMT_U16_LE 0x00000080 /* Little endian U16 */
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#define AOUT_FMT_U16_BE 0x00000100 /* Big endian U16 */
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#ifdef WORDS_BIGENDIAN
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#define AOUT_FMT_S16_NE AOUT_FMT_S16_BE
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#else
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#define AOUT_FMT_S16_NE AOUT_FMT_S16_LE
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#endif
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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aout_thread_t * aout_CreateThread ( int *pi_status );
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void aout_DestroyThread ( aout_thread_t *p_aout, int *pi_status );
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aout_fifo_t * aout_CreateFifo ( aout_thread_t *p_aout, aout_fifo_t *p_fifo );
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void aout_DestroyFifo ( aout_fifo_t *p_fifo );
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