/*****************************************************************************
- * audio_output.c : audio output thread
+ * audio_output.c : audio output instance
*****************************************************************************
- * Copyright (C) 1999-2001 VideoLAN
- * $Id: audio_output.c,v 1.76 2002/02/15 13:32:54 sam Exp $
+ * Copyright (C) 2002 VideoLAN
+ * $Id: audio_output.c,v 1.95 2002/08/14 00:23:59 massiot Exp $
*
- * Authors: Michel Kaempf <maxx@via.ecp.fr>
- * Cyril Deguet <asmax@via.ecp.fr>
+ * Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* 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
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdio.h> /* "intf_msg.h" */
#include <stdlib.h> /* calloc(), malloc(), free() */
#include <string.h>
-#include <videolan/vlc.h>
+#include <vlc/vlc.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h> /* getpid() */
-#endif
-
-#ifdef WIN32 /* getpid() for win32 is located in process.h */
-# include <process.h>
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
#endif
#include "audio_output.h"
-#include "aout_common.h"
-
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-static int aout_SpawnThread( aout_thread_t * p_aout );
+#include "aout_internal.h"
/*****************************************************************************
- * aout_InitBank: initialize the audio output bank.
+ * aout_NewInstance: initialize aout structure
*****************************************************************************/
-void aout_InitBank ( void )
+aout_instance_t * __aout_NewInstance( vlc_object_t * p_parent )
{
- p_aout_bank->i_count = 0;
+ aout_instance_t * p_aout;
+
+ /* Allocate descriptor. */
+ p_aout = vlc_object_create( p_parent, VLC_OBJECT_AOUT );
+ if( p_aout == NULL )
+ {
+ return NULL;
+ }
- vlc_mutex_init( &p_aout_bank->lock );
+ /* Initialize members. */
+ vlc_mutex_init( p_parent, &p_aout->input_lock );
+ vlc_cond_init( p_parent, &p_aout->input_signal );
+ p_aout->i_inputs_active = 0;
+ p_aout->b_change_requested = 0;
+ p_aout->i_nb_inputs = 0;
+
+ vlc_mutex_init( p_parent, &p_aout->mixer_lock );
+ vlc_cond_init( p_parent, &p_aout->mixer_signal );
+ p_aout->b_mixer_active = 0;
+
+ vlc_object_attach( p_aout, p_parent->p_vlc );
+
+ return p_aout;
}
/*****************************************************************************
- * aout_EndBank: empty the audio output bank.
- *****************************************************************************
- * This function ends all unused audio outputs and empties the bank in
- * case of success.
+ * aout_DeleteInstance: destroy aout structure
*****************************************************************************/
-void aout_EndBank ( void )
+void aout_DeleteInstance( aout_instance_t * p_aout )
{
- /* Ask all remaining audio outputs to die */
- while( p_aout_bank->i_count )
- {
- aout_DestroyThread(
- p_aout_bank->pp_aout[ --p_aout_bank->i_count ], NULL );
- }
+ vlc_mutex_destroy( &p_aout->input_lock );
+ vlc_cond_destroy( &p_aout->input_signal );
+ vlc_mutex_destroy( &p_aout->mixer_lock );
+ vlc_cond_destroy( &p_aout->mixer_signal );
- vlc_mutex_destroy( &p_aout_bank->lock );
+ /* Free structure. */
+ vlc_object_destroy( p_aout );
}
/*****************************************************************************
- * aout_CreateThread: initialize audio thread
+ * aout_BufferNew : ask for a new empty buffer
*****************************************************************************/
-aout_thread_t *aout_CreateThread( int *pi_status, int i_channels, long l_rate )
+aout_buffer_t * aout_BufferNew( aout_instance_t * p_aout,
+ aout_input_t * p_input,
+ size_t i_nb_samples )
{
- aout_thread_t * p_aout; /* thread descriptor */
-#if 0
- int i_status; /* thread status */
-#endif
-
- /* Allocate descriptor */
- p_aout = (aout_thread_t *) malloc( sizeof(aout_thread_t) );
- if( p_aout == NULL )
+ aout_buffer_t * p_buffer;
+ mtime_t duration = (1000000 * (mtime_t)i_nb_samples)
+ / p_input->input.i_rate;
+
+ /* This necessarily allocates in the heap. */
+ aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
+ p_buffer->i_nb_samples = i_nb_samples;
+ p_buffer->i_nb_bytes = duration
+ * aout_FormatToByterate( &p_input->input )
+ / 1000000;
+
+ if ( p_buffer == NULL )
{
- return( NULL );
+ msg_Err( p_aout, "NULL buffer !" );
}
-
- p_aout->i_latency = 0;
- p_aout->l_rate = main_GetIntVariable( AOUT_RATE_VAR, l_rate );
- p_aout->i_channels = 1 + main_GetIntVariable( AOUT_STEREO_VAR,
- i_channels - 1 );
-
- intf_WarnMsg( 3, "aout info: thread created, channels %d, rate %d",
- p_aout->i_channels, p_aout->l_rate );
-
- /* Maybe we should pass this setting in argument */
- p_aout->i_format = AOUT_FORMAT_DEFAULT;
-
- /* special setting for ac3 pass-through mode */
- /* FIXME is it necessary ? (cf ac3_adec.c) */
- if( main_GetIntVariable( AOUT_SPDIF_VAR, 0 ) && p_main->b_ac3 )
- {
- intf_WarnMsg( 4, "aout info: setting ac3 spdif" );
- p_aout->i_format = AOUT_FMT_AC3;
- }
-
- if( p_aout->l_rate == 0 )
- {
- intf_ErrMsg( "aout error: null sample rate" );
- free( p_aout );
- return( NULL );
- }
-
- /* FIXME: only works for i_channels == 1 or 2 ?? */
- p_aout->b_stereo = ( p_aout->i_channels == 2 ) ? 1 : 0;
-
- /* Choose the best module */
- p_aout->p_module = module_Need( MODULE_CAPABILITY_AOUT,
- main_GetPszVariable( AOUT_METHOD_VAR, NULL ),
- (void *)p_aout );
-
- if( p_aout->p_module == NULL )
- {
- intf_ErrMsg( "aout error: no suitable aout module" );
- free( p_aout );
- return( NULL );
- }
-
-#define aout_functions p_aout->p_module->p_functions->aout.functions.aout
- p_aout->pf_open = aout_functions.pf_open;
- p_aout->pf_setformat = aout_functions.pf_setformat;
- p_aout->pf_getbufinfo = aout_functions.pf_getbufinfo;
- p_aout->pf_play = aout_functions.pf_play;
- p_aout->pf_close = aout_functions.pf_close;
-#undef aout_functions
-
- /*
- * Initialize audio device
- */
- if ( p_aout->pf_setformat( p_aout ) )
+ else
{
- p_aout->pf_close( p_aout );
- module_Unneed( p_aout->p_module );
- free( p_aout );
- return( NULL );
+ p_buffer->start_date = p_buffer->end_date = 0;
}
- /* Initialize the volume level */
- p_aout->i_volume = main_GetIntVariable( AOUT_VOLUME_VAR, VOLUME_DEFAULT );
- p_aout->i_savedvolume = 0;
-
- /* FIXME: maybe it would be cleaner to change SpawnThread prototype
- * see vout to handle status correctly ?? however, it is not critical since
- * this thread is only called in main and all calls are blocking */
- if( aout_SpawnThread( p_aout ) )
- {
- p_aout->pf_close( p_aout );
- module_Unneed( p_aout->p_module );
- free( p_aout );
- return( NULL );
- }
-
- return( p_aout );
+ return p_buffer;
}
-
/*****************************************************************************
- * Declare the different aout thread functions
+ * aout_BufferDelete : destroy an undecoded buffer
*****************************************************************************/
-DECLARE_AOUT_THREAD( S16, s16, ( p_aout->s32_buffer[l_buffer] /
- AOUT_MAX_FIFOS ) )
-
-DECLARE_AOUT_THREAD( U16, u16, (( p_aout->s32_buffer[l_buffer] /
- AOUT_MAX_FIFOS) + 128) )
-
-DECLARE_AOUT_THREAD( U8, u8, (( p_aout->s32_buffer[l_buffer] /
- AOUT_MAX_FIFOS / 256) + 128 ) )
-
-DECLARE_AOUT_THREAD( S8, s8, ( p_aout->s32_buffer[l_buffer] /
- AOUT_MAX_FIFOS / 256) )
-
+void aout_BufferDelete( aout_instance_t * p_aout, aout_input_t * p_input,
+ aout_buffer_t * p_buffer )
+{
+ aout_BufferFree( p_buffer );
+}
/*****************************************************************************
- * aout_SpawnThread
+ * aout_BufferPlay : filter & mix the decoded buffer
*****************************************************************************/
-static int aout_SpawnThread( aout_thread_t * p_aout )
+void aout_BufferPlay( aout_instance_t * p_aout, aout_input_t * p_input,
+ aout_buffer_t * p_buffer )
{
- int i_fifo;
- long l_bytes;
- void (* pf_aout_thread)( aout_thread_t * ) = NULL;
-
- /* We want the audio output thread to live */
- p_aout->b_die = 0;
- p_aout->b_active = 1;
+ vlc_bool_t b_run_mixer = 0;
- /* Initialize the fifos lock */
- vlc_mutex_init( &p_aout->fifos_lock );
- /* Initialize audio fifos : set all fifos as empty and initialize locks */
- for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
+ if ( p_buffer->start_date == 0 )
{
- p_aout->fifo[i_fifo].i_type = AOUT_EMPTY_FIFO;
- vlc_mutex_init( &p_aout->fifo[i_fifo].data_lock );
- vlc_cond_init( &p_aout->fifo[i_fifo].data_wait );
+ msg_Warn( p_aout, "non-dated buffer received" );
+ aout_BufferFree( p_buffer );
}
-
- /* Compute the size (in audio units) of the audio output buffer. Although
- * AOUT_BUFFER_DURATION is given in microseconds, the output rate is given
- * in Hz, that's why we need to divide by 10^6 microseconds (1 second) */
- p_aout->l_units = (long)( ((s64)p_aout->l_rate * AOUT_BUFFER_DURATION) / 1000000 );
- p_aout->l_msleep = (long)( ((s64)p_aout->l_units * 1000000) / (s64)p_aout->l_rate );
-
- /* Make pf_aout_thread point to the right thread function, and compute the
- * byte size of the audio output buffer */
- switch ( p_aout->i_channels )
+ else
{
- /* Audio output is mono */
- case 1:
- switch ( p_aout->i_format )
- {
- case AOUT_FMT_U8:
- intf_WarnMsg( 2, "aout info: unsigned 8 bits mono thread" );
- l_bytes = 1 * sizeof(u8) * p_aout->l_units;
- pf_aout_thread = aout_U8Thread;
- break;
-
- case AOUT_FMT_S8:
- intf_WarnMsg( 2, "aout info: signed 8 bits mono thread" );
- l_bytes = 1 * sizeof(s8) * p_aout->l_units;
- pf_aout_thread = aout_S8Thread;
- break;
-
- case AOUT_FMT_U16_LE:
- case AOUT_FMT_U16_BE:
- intf_WarnMsg( 2, "aout info: unsigned 16 bits mono thread" );
- l_bytes = 1 * sizeof(u16) * p_aout->l_units;
- pf_aout_thread = aout_U16Thread;
- break;
-
- case AOUT_FMT_S16_LE:
- case AOUT_FMT_S16_BE:
- intf_WarnMsg( 2, "aout info: signed 16 bits mono thread" );
- l_bytes = 1 * sizeof(s16) * p_aout->l_units;
- pf_aout_thread = aout_S16Thread;
- break;
-
- default:
- intf_ErrMsg( "aout error: unknown audio output format (%i)",
- p_aout->i_format );
- return( -1 );
- }
- break;
-
- /* Audio output is stereo */
- case 2:
- switch ( p_aout->i_format )
- {
- case AOUT_FMT_U8:
- intf_WarnMsg( 2, "aout info: unsigned 8 bits stereo thread" );
- l_bytes = 2 * sizeof(u8) * p_aout->l_units;
- pf_aout_thread = aout_U8Thread;
- break;
-
- case AOUT_FMT_S8:
- intf_WarnMsg( 2, "aout info: signed 8 bits stereo thread" );
- l_bytes = 2 * sizeof(s8) * p_aout->l_units;
- pf_aout_thread = aout_S8Thread;
- break;
-
- case AOUT_FMT_U16_LE:
- case AOUT_FMT_U16_BE:
- intf_WarnMsg( 2, "aout info: unsigned 16 bits stereo thread" );
- l_bytes = 2 * sizeof(u16) * p_aout->l_units;
- pf_aout_thread = aout_U16Thread;
- break;
-
- case AOUT_FMT_S16_LE:
- case AOUT_FMT_S16_BE:
- intf_WarnMsg( 2, "aout info: signed 16 bits stereo thread" );
- l_bytes = 2 * sizeof(s16) * p_aout->l_units;
- pf_aout_thread = aout_S16Thread;
- break;
-
- case AOUT_FMT_AC3:
- intf_WarnMsg( 2, "aout info: ac3 pass-through thread" );
- l_bytes = SPDIF_FRAME_SIZE;
- pf_aout_thread = aout_SpdifThread;
- break;
-
- default:
- intf_ErrMsg( "aout error: unknown audio output format %i",
- p_aout->i_format );
- return( -1 );
- }
- break;
-
- default:
- intf_ErrMsg( "aout error: unknown number of audio channels (%i)",
- p_aout->i_channels );
- return( -1 );
+ p_buffer->end_date = p_buffer->start_date
+ + (mtime_t)(p_buffer->i_nb_samples * 1000000)
+ / p_input->input.i_rate;
}
- /* Allocate the memory needed by the audio output buffers, and set to zero
- * the s32 buffer's memory */
- p_aout->buffer = malloc( l_bytes );
- if ( p_aout->buffer == NULL )
- {
- intf_ErrMsg( "aout error: cannot create output buffer" );
- return( -1 );
- }
+ /* If the buffer is too early, wait a while. */
+ mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
- p_aout->s32_buffer = (s32 *)calloc( p_aout->l_units,
- sizeof(s32) << ( p_aout->b_stereo ) );
- if ( p_aout->s32_buffer == NULL )
+ aout_InputPlay( p_aout, p_input, p_buffer );
+
+ /* Run the mixer if it is able to run. */
+ vlc_mutex_lock( &p_aout->mixer_lock );
+ if ( !p_aout->b_mixer_active )
{
- intf_ErrMsg( "aout error: cannot create the s32 output buffer" );
- free( p_aout->buffer );
- return( -1 );
+ p_aout->b_mixer_active = 1;
+ b_run_mixer = 1;
}
+ vlc_mutex_unlock( &p_aout->mixer_lock );
- /* Rough estimate of the playing date */
- p_aout->date = mdate() + p_main->i_desync;
-
- /* Launch the thread */
- if ( vlc_thread_create( &p_aout->thread_id, "audio output",
- (vlc_thread_func_t)pf_aout_thread, p_aout ) )
+ if ( b_run_mixer )
{
- intf_ErrMsg( "aout error: cannot spawn audio output thread" );
- free( p_aout->buffer );
- free( p_aout->s32_buffer );
- return( -1 );
+ aout_MixerRun( p_aout );
+ vlc_mutex_lock( &p_aout->mixer_lock );
+ p_aout->b_mixer_active = 0;
+ vlc_cond_broadcast( &p_aout->mixer_signal );
+ vlc_mutex_unlock( &p_aout->mixer_lock );
}
-
- intf_WarnMsg( 2, "aout info: audio output thread %i spawned", getpid() );
- return( 0 );
}
/*****************************************************************************
- * aout_DestroyThread
+ * aout_FormatToByterate : compute the number of bytes per second
*****************************************************************************/
-void aout_DestroyThread( aout_thread_t * p_aout, int *pi_status )
+int aout_FormatToByterate( audio_sample_format_t * p_format )
{
- int i_fifo;
-
- /* FIXME: pi_status is not handled correctly: check vout how to do!?? */
+ int i_result;
- /* Ask thread to kill itself and wait until it's done */
- p_aout->b_die = 1;
- vlc_thread_join( p_aout->thread_id ); /* only if pi_status is NULL */
+ switch ( p_format->i_format )
+ {
+ case AOUT_FMT_U8:
+ case AOUT_FMT_S8:
+ i_result = 1;
+ break;
- /* Free the allocated memory */
- free( p_aout->buffer );
- free( p_aout->s32_buffer );
+ case AOUT_FMT_U16_LE:
+ case AOUT_FMT_U16_BE:
+ case AOUT_FMT_S16_LE:
+ case AOUT_FMT_S16_BE:
+ i_result = 2;
+ break;
- /* Destroy the condition and mutex locks */
- for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
- {
- vlc_mutex_destroy( &p_aout->fifo[i_fifo].data_lock );
- vlc_cond_destroy( &p_aout->fifo[i_fifo].data_wait );
- }
- vlc_mutex_destroy( &p_aout->fifos_lock );
-
- /* Free the plugin */
- p_aout->pf_close( p_aout );
+ case AOUT_FMT_FLOAT32:
+ case AOUT_FMT_FIXED32:
+ i_result = 4;
+ break;
+
+ case AOUT_FMT_SPDIF:
+ case AOUT_FMT_A52:
+ case AOUT_FMT_DTS:
+ /* For these formats the caller has to indicate the number of bytes
+ * per second it evaluates. */
+ return p_format->i_bytes_per_sec;
- /* Release the aout module */
- module_Unneed( p_aout->p_module );
+ default:
+ return 0; /* will segfault much sooner... */
+ }
- /* Free structure */
- free( p_aout );
+ return i_result * p_format->i_channels * p_format->i_rate;
}
projects / vlc / blobdiff