mirror of
https://code.videolan.org/videolan/vlc
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7d2ff7e2a1
automatically discarding audio samples that were above AOUT_MAX_ADVANCE_TIME in the future. Problem is that p_input->i_pts_delay isn't a fixed value. We now fetch this value from the input thread when we create an aout_instance_t. This solves problems with the http access plugin.
307 lines
14 KiB
C
307 lines
14 KiB
C
/*****************************************************************************
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* aout_internal.h : internal defines for audio output
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*****************************************************************************
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* Copyright (C) 2002 VideoLAN
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* $Id: aout_internal.h,v 1.40 2003/03/06 23:10:11 gbazin Exp $
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*
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* Authors: Christophe Massiot <massiot@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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* aout_alloc_t : allocation of memory in the audio output
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*****************************************************************************/
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typedef struct aout_alloc_t
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{
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int i_alloc_type;
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int i_bytes_per_sec;
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} aout_alloc_t;
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#define AOUT_ALLOC_NONE 0
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#define AOUT_ALLOC_STACK 1
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#define AOUT_ALLOC_HEAP 2
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#ifdef HAVE_ALLOCA
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# define ALLOCA_TEST( p_alloc, p_new_buffer ) \
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if ( (p_alloc)->i_alloc_type == AOUT_ALLOC_STACK ) \
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{ \
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(p_new_buffer) = alloca( i_alloc_size + sizeof(aout_buffer_t) );\
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} \
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else
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#else
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# define ALLOCA_TEST( p_alloc, p_new_buffer )
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#endif
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#define aout_BufferAlloc( p_alloc, i_nb_usec, p_previous_buffer, \
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p_new_buffer ) \
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if ( (p_alloc)->i_alloc_type == AOUT_ALLOC_NONE ) \
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{ \
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(p_new_buffer) = p_previous_buffer; \
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} \
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else \
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{ \
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int i_alloc_size; \
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i_alloc_size = (int)( (uint64_t)(p_alloc)->i_bytes_per_sec \
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* (i_nb_usec) / 1000000 + 1 ); \
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ALLOCA_TEST( p_alloc, p_new_buffer ) \
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{ \
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(p_new_buffer) = malloc( i_alloc_size + sizeof(aout_buffer_t) );\
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} \
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if ( p_new_buffer != NULL ) \
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{ \
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(p_new_buffer)->i_alloc_type = (p_alloc)->i_alloc_type; \
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(p_new_buffer)->i_size = i_alloc_size; \
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(p_new_buffer)->p_buffer = (byte_t *)(p_new_buffer) \
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+ sizeof(aout_buffer_t); \
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if ( (p_previous_buffer) != NULL ) \
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{ \
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(p_new_buffer)->start_date = \
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((aout_buffer_t *)p_previous_buffer)->start_date;\
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(p_new_buffer)->end_date = \
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((aout_buffer_t *)p_previous_buffer)->end_date; \
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} \
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} \
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/* we'll keep that for a while --Meuuh */ \
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/* else printf("%s:%d\n", __FILE__, __LINE__); */ \
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}
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#define aout_BufferFree( p_buffer ) \
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if ( (p_buffer)->i_alloc_type == AOUT_ALLOC_HEAP ) \
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{ \
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free( p_buffer ); \
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}
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/*****************************************************************************
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* aout_fifo_t : audio output buffer FIFO
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*****************************************************************************/
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struct aout_fifo_t
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{
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aout_buffer_t * p_first;
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aout_buffer_t ** pp_last;
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audio_date_t end_date;
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};
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/*****************************************************************************
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* aout_filter_t : audio output filter
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*****************************************************************************/
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typedef struct aout_filter_t
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{
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VLC_COMMON_MEMBERS
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audio_sample_format_t input;
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audio_sample_format_t output;
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aout_alloc_t output_alloc;
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module_t * p_module;
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struct aout_filter_sys_t * p_sys;
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void (* pf_do_work)( struct aout_instance_t *,
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struct aout_filter_t *,
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struct aout_buffer_t *,
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struct aout_buffer_t * );
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vlc_bool_t b_in_place;
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vlc_bool_t b_continuity;
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} aout_filter_t;
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/*****************************************************************************
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* aout_mixer_t : audio output mixer
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*****************************************************************************/
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typedef struct aout_mixer_t
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{
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audio_sample_format_t mixer;
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aout_alloc_t output_alloc;
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module_t * p_module;
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struct aout_mixer_sys_t * p_sys;
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void (* pf_do_work)( struct aout_instance_t *,
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struct aout_buffer_t * );
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/* If b_error == 1, there is no mixer. */
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vlc_bool_t b_error;
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/* Multiplier used to raise or lower the volume of the sound in
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* software. Beware, this creates sound distortion and should be avoided
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* as much as possible. This isn't available for non-float32 mixer. */
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float f_multiplier;
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} aout_mixer_t;
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/*****************************************************************************
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* aout_input_t : input stream for the audio output
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*****************************************************************************/
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#define AOUT_RESAMPLING_NONE 0
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#define AOUT_RESAMPLING_UP 1
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#define AOUT_RESAMPLING_DOWN 2
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struct aout_input_t
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{
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/* When this lock is taken, the pipeline cannot be changed by a
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* third-party. */
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vlc_mutex_t lock;
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audio_sample_format_t input;
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aout_alloc_t input_alloc;
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/* pre-filters */
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aout_filter_t * pp_filters[AOUT_MAX_FILTERS];
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int i_nb_filters;
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/* resamplers */
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aout_filter_t * pp_resamplers[AOUT_MAX_FILTERS];
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int i_nb_resamplers;
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int i_resampling_type;
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mtime_t i_resamp_start_date;
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int i_resamp_start_drift;
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aout_fifo_t fifo;
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/* Mixer information */
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byte_t * p_first_byte_to_mix;
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/* If b_error == 1, there is no input pipeline. */
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vlc_bool_t b_error;
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/* Did we just change the output format ? (expect buffer inconsistencies) */
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vlc_bool_t b_changed;
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};
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/*****************************************************************************
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* aout_output_t : output stream for the audio output
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*****************************************************************************/
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typedef struct aout_output_t
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{
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audio_sample_format_t output;
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/* Indicates whether the audio output is currently starving, to avoid
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* printing a 1,000 "output is starving" messages. */
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vlc_bool_t b_starving;
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/* post-filters */
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aout_filter_t * pp_filters[AOUT_MAX_FILTERS];
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int i_nb_filters;
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aout_fifo_t fifo;
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struct module_t * p_module;
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struct aout_sys_t * p_sys;
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void (* pf_play)( aout_instance_t * );
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int (* pf_volume_get )( aout_instance_t *, audio_volume_t * );
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int (* pf_volume_set )( aout_instance_t *, audio_volume_t );
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int (* pf_volume_infos )( aout_instance_t *, audio_volume_t * );
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int i_nb_samples;
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/* Current volume for the output - it's just a placeholder, the plug-in
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* may or may not use it. */
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audio_volume_t i_volume;
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/* If b_error == 1, there is no audio output pipeline. */
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vlc_bool_t b_error;
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} aout_output_t;
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/*****************************************************************************
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* aout_instance_t : audio output thread descriptor
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*****************************************************************************/
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struct aout_instance_t
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{
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VLC_COMMON_MEMBERS
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/* Locks : please note that if you need several of these locks, it is
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* mandatory (to avoid deadlocks) to take them in the following order :
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* mixer_lock, p_input->lock, output_fifo_lock, input_fifos_lock.
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* --Meuuh */
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/* When input_fifos_lock is taken, none of the p_input->fifo structures
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* can be read or modified by a third-party thread. */
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vlc_mutex_t input_fifos_lock;
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/* When mixer_lock is taken, all decoder threads willing to mix a
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* buffer must wait until it is released. The output pipeline cannot
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* be modified. No input stream can be added or removed. */
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vlc_mutex_t mixer_lock;
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/* When output_fifo_lock is taken, the p_aout->output.fifo structure
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* cannot be read or written by a third-party thread. */
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vlc_mutex_t output_fifo_lock;
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/* Input streams & pre-filters */
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aout_input_t * pp_inputs[AOUT_MAX_INPUTS];
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int i_nb_inputs;
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/* Mixer */
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aout_mixer_t mixer;
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/* Output plug-in */
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aout_output_t output;
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int i_pts_delay; /* internal caching */
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};
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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/* From input.c : */
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int aout_InputNew( aout_instance_t * p_aout, aout_input_t * p_input );
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int aout_InputDelete( aout_instance_t * p_aout, aout_input_t * p_input );
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int aout_InputPlay( aout_instance_t * p_aout, aout_input_t * p_input,
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aout_buffer_t * p_buffer );
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/* From filters.c : */
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int aout_FiltersCreatePipeline( aout_instance_t * p_aout,
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aout_filter_t ** pp_filters,
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int * pi_nb_filters,
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const audio_sample_format_t * p_input_format,
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const audio_sample_format_t * p_output_format );
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void aout_FiltersDestroyPipeline( aout_instance_t * p_aout,
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aout_filter_t ** pp_filters,
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int i_nb_filters );
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void aout_FiltersHintBuffers( aout_instance_t * p_aout,
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aout_filter_t ** pp_filters,
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int i_nb_filters, aout_alloc_t * p_first_alloc );
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void aout_FiltersPlay( aout_instance_t * p_aout,
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aout_filter_t ** pp_filters,
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int i_nb_filters, aout_buffer_t ** pp_input_buffer );
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/* From mixer.c : */
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int aout_MixerNew( aout_instance_t * p_aout );
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void aout_MixerDelete( aout_instance_t * p_aout );
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void aout_MixerRun( aout_instance_t * p_aout );
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int aout_MixerMultiplierSet( aout_instance_t * p_aout, float f_multiplier );
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int aout_MixerMultiplierGet( aout_instance_t * p_aout, float * pf_multiplier );
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/* From output.c : */
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int aout_OutputNew( aout_instance_t * p_aout,
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audio_sample_format_t * p_format );
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void aout_OutputPlay( aout_instance_t * p_aout, aout_buffer_t * p_buffer );
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void aout_OutputDelete( aout_instance_t * p_aout );
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VLC_EXPORT( aout_buffer_t *, aout_OutputNextBuffer, ( aout_instance_t *, mtime_t, vlc_bool_t ) );
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/* From common.c : */
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VLC_EXPORT( unsigned int, aout_FormatNbChannels, ( const audio_sample_format_t * p_format ) );
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VLC_EXPORT( void, aout_FormatPrepare, ( audio_sample_format_t * p_format ) );
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VLC_EXPORT( void, aout_FormatPrint, ( aout_instance_t * p_aout, const char * psz_text, const audio_sample_format_t * p_format ) );
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VLC_EXPORT( void, aout_FormatsPrint, ( aout_instance_t * p_aout, const char * psz_text, const audio_sample_format_t * p_format1, const audio_sample_format_t * p_format2 ) );
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VLC_EXPORT( const char *, aout_FormatPrintChannels, ( const audio_sample_format_t * ) );
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void aout_FifoInit( aout_instance_t *, aout_fifo_t *, uint32_t );
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mtime_t aout_FifoNextStart( aout_instance_t *, aout_fifo_t * );
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void aout_FifoPush( aout_instance_t *, aout_fifo_t *, aout_buffer_t * );
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void aout_FifoSet( aout_instance_t *, aout_fifo_t *, mtime_t );
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void aout_FifoMoveDates( aout_instance_t *, aout_fifo_t *, mtime_t );
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VLC_EXPORT( aout_buffer_t *, aout_FifoPop, ( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) );
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void aout_FifoDestroy( aout_instance_t * p_aout, aout_fifo_t * p_fifo );
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VLC_EXPORT( mtime_t, aout_FifoFirstDate, ( aout_instance_t *, aout_fifo_t * ) );
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/* From intf.c :*/
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VLC_EXPORT( void, aout_VolumeSoftInit, ( aout_instance_t * ) );
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int aout_VolumeSoftGet( aout_instance_t *, audio_volume_t * );
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int aout_VolumeSoftSet( aout_instance_t *, audio_volume_t );
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int aout_VolumeSoftInfos( aout_instance_t *, audio_volume_t * );
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VLC_EXPORT( void, aout_VolumeNoneInit, ( aout_instance_t * ) );
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int aout_VolumeNoneGet( aout_instance_t *, audio_volume_t * );
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int aout_VolumeNoneSet( aout_instance_t *, audio_volume_t );
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int aout_VolumeNoneInfos( aout_instance_t *, audio_volume_t * );
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