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299 lines
12 KiB
299 lines
12 KiB
/*****************************************************************************
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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 1.7 2002/08/19 23:12:57 massiot 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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#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 = (u64)(p_alloc)->i_bytes_per_sec \
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* (i_nb_usec) / 1000000 + 1; \
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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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{ \
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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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typedef struct aout_fifo_t
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{
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struct aout_buffer_t * p_first;
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struct aout_buffer_t ** pp_last;
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mtime_t end_date;
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} aout_fifo_t;
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static inline void aout_FifoInit( struct aout_instance_t * p_aout,
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aout_fifo_t * p_fifo )
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{
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p_fifo->p_first = NULL;
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p_fifo->pp_last = &p_fifo->p_first;
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p_fifo->end_date = 0;
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}
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static inline void aout_FifoPush( struct aout_instance_t * p_aout,
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aout_fifo_t * p_fifo,
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aout_buffer_t * p_buffer )
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{
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*p_fifo->pp_last = p_buffer;
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p_fifo->pp_last = &p_buffer->p_next;
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*p_fifo->pp_last = NULL;
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/* Enforce continuity of the stream. */
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if ( p_fifo->end_date )
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{
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mtime_t duration = p_buffer->end_date - p_buffer->start_date;
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p_buffer->start_date = p_fifo->end_date;
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p_buffer->end_date = p_fifo->end_date =
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p_buffer->start_date + duration;
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}
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else
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{
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p_fifo->end_date = p_buffer->end_date;
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}
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}
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static inline mtime_t aout_FifoNextStart( struct aout_instance_t * p_aout,
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aout_fifo_t * p_fifo )
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{
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return p_fifo->end_date;
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}
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/* Reinit the end_date (for instance after a pause). */
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static inline void aout_FifoSet( struct aout_instance_t * p_aout,
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aout_fifo_t * p_fifo, mtime_t date )
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{
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aout_buffer_t * p_buffer;
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p_fifo->end_date = date;
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/* Remove all buffers. */
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p_buffer = p_fifo->p_first;
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while ( p_buffer != NULL )
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{
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aout_buffer_t * p_next = p_buffer->p_next;
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aout_BufferFree( p_buffer );
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p_buffer = p_next;
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}
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p_fifo->p_first = NULL;
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p_fifo->pp_last = &p_fifo->p_first;
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}
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/* This function supposes there is at least one buffer in p_fifo. */
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static inline aout_buffer_t * aout_FifoPop( struct aout_instance_t * p_aout,
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aout_fifo_t * p_fifo )
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{
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aout_buffer_t * p_buffer;
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p_buffer = p_fifo->p_first;
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p_fifo->p_first = p_buffer->p_next;
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if ( p_fifo->p_first == NULL )
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{
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p_fifo->pp_last = &p_fifo->p_first;
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}
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return p_buffer;
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}
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static inline void aout_FifoDestroy( struct aout_instance_t * p_aout,
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aout_fifo_t * p_fifo )
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{
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aout_buffer_t * p_buffer;
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p_buffer = p_fifo->p_first;
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while ( p_buffer != NULL )
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{
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aout_buffer_t * p_next = p_buffer->p_next;
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aout_BufferFree( p_buffer );
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p_buffer = p_next;
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}
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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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} 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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} 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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struct aout_input_t
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{
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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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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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};
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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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/* 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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int (* pf_setformat)( aout_instance_t * );
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void (* pf_play)( aout_instance_t * );
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int i_nb_samples;
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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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/* Input streams & pre-filters */
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vlc_mutex_t input_lock;
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vlc_cond_t input_signal;
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int i_inputs_active;
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vlc_bool_t b_change_requested;
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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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vlc_mutex_t mixer_lock;
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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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};
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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void 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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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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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_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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