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More changes in the date handling. Should be more tolerant with

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pause/play and change of audio channel.
This commit is contained in:
Christophe Massiot 2002-08-19 23:12:57 +00:00
parent 9a1fd91901
commit 922ab4d4f4
7 changed files with 148 additions and 140 deletions
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33
include/aout_internal.h
View File

@ -2,7 +2,7 @@
* aout_internal.h : internal defines for audio output
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: aout_internal.h,v 1.6 2002/08/19 21:31:11 massiot Exp $
* $Id: aout_internal.h,v 1.7 2002/08/19 23:12:57 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
@ -82,7 +82,6 @@ typedef struct aout_alloc_t
*****************************************************************************/
typedef struct aout_fifo_t
{
vlc_mutex_t lock;
struct aout_buffer_t * p_first;
struct aout_buffer_t ** pp_last;
mtime_t end_date;
@ -91,7 +90,6 @@ typedef struct aout_fifo_t
static inline void aout_FifoInit( struct aout_instance_t * p_aout,
aout_fifo_t * p_fifo )
{
vlc_mutex_init( (vlc_object_t *)p_aout, &p_fifo->lock );
p_fifo->p_first = NULL;
p_fifo->pp_last = &p_fifo->p_first;
p_fifo->end_date = 0;
@ -101,7 +99,6 @@ static inline void aout_FifoPush( struct aout_instance_t * p_aout,
aout_fifo_t * p_fifo,
aout_buffer_t * p_buffer )
{
vlc_mutex_lock( &p_fifo->lock );
*p_fifo->pp_last = p_buffer;
p_fifo->pp_last = &p_buffer->p_next;
*p_fifo->pp_last = NULL;
@ -118,26 +115,31 @@ static inline void aout_FifoPush( struct aout_instance_t * p_aout,
{
p_fifo->end_date = p_buffer->end_date;
}
vlc_mutex_unlock( &p_fifo->lock );
}
static inline mtime_t aout_FifoNextStart( struct aout_instance_t * p_aout,
aout_fifo_t * p_fifo )
{
mtime_t end_date;
vlc_mutex_lock( &p_fifo->lock );
end_date = p_fifo->end_date;
vlc_mutex_unlock( &p_fifo->lock );
return end_date;
return p_fifo->end_date;
}
/* Reinit the end_date (for instance after a pause). */
static inline void aout_FifoSet( struct aout_instance_t * p_aout,
aout_fifo_t * p_fifo, mtime_t date )
{
vlc_mutex_lock( &p_fifo->lock );
aout_buffer_t * p_buffer;
p_fifo->end_date = date;
vlc_mutex_unlock( &p_fifo->lock );
/* Remove all buffers. */
p_buffer = p_fifo->p_first;
while ( p_buffer != NULL )
{
aout_buffer_t * p_next = p_buffer->p_next;
aout_BufferFree( p_buffer );
p_buffer = p_next;
}
p_fifo->p_first = NULL;
p_fifo->pp_last = &p_fifo->p_first;
}
/* This function supposes there is at least one buffer in p_fifo. */
@ -145,14 +147,12 @@ static inline aout_buffer_t * aout_FifoPop( struct aout_instance_t * p_aout,
aout_fifo_t * p_fifo )
{
aout_buffer_t * p_buffer;
vlc_mutex_lock( &p_fifo->lock );
p_buffer = p_fifo->p_first;
p_fifo->p_first = p_buffer->p_next;
if ( p_fifo->p_first == NULL )
{
p_fifo->pp_last = &p_fifo->p_first;
}
vlc_mutex_unlock( &p_fifo->lock );
return p_buffer;
}
@ -162,7 +162,6 @@ static inline void aout_FifoDestroy( struct aout_instance_t * p_aout,
{
aout_buffer_t * p_buffer;
vlc_mutex_destroy( &p_fifo->lock );
p_buffer = p_fifo->p_first;
while ( p_buffer != NULL )
{
@ -260,9 +259,7 @@ struct aout_instance_t
int i_nb_inputs;
/* Mixer */
vlc_cond_t mixer_signal; /* the associated mutex is
* p_aout->output.fifo.lock */
vlc_bool_t b_mixer_active;
vlc_mutex_t mixer_lock;
aout_mixer_t mixer;
/* Output plug-in */

9
modules/audio_output/file.c
View File

@ -2,7 +2,7 @@
* file.c : audio output which writes the samples to a file
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: file.c,v 1.7 2002/08/19 23:07:30 sam Exp $
* $Id: file.c,v 1.8 2002/08/19 23:12:57 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
@ -148,7 +148,12 @@ static int SetFormat( aout_instance_t * p_aout )
*****************************************************************************/
static void Play( aout_instance_t * p_aout )
{
aout_buffer_t * p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
aout_buffer_t * p_buffer;
/* We don't need the mixer lock, since Play is entered _with_ the
* mixer lock. */
p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
if( fwrite( p_buffer->p_buffer, p_buffer->i_nb_bytes, 1,
(FILE *)p_aout->output.p_sys ) != 1 )
{

4
modules/misc/dummy/aout.c
View File

@ -2,7 +2,7 @@
* aout_dummy.c : dummy audio output plugin
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: aout.c,v 1.5 2002/08/19 21:31:11 massiot Exp $
* $Id: aout.c,v 1.6 2002/08/19 23:12:57 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
@ -77,6 +77,8 @@ static int SetFormat( aout_instance_t * p_aout )
*****************************************************************************/
static void Play( aout_instance_t * p_aout )
{
/* We don't need the mixer lock, since Play is entered _with_ the
* mixer lock. */
aout_buffer_t * p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
aout_BufferFree( p_buffer );
}

7
src/audio_output/audio_output.c
View File

@ -2,7 +2,7 @@
* audio_output.c : audio output instance
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: audio_output.c,v 1.97 2002/08/19 21:31:11 massiot Exp $
* $Id: audio_output.c,v 1.98 2002/08/19 23:12:57 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
@ -57,8 +57,7 @@ aout_instance_t * __aout_NewInstance( vlc_object_t * p_parent )
p_aout->b_change_requested = 0;
p_aout->i_nb_inputs = 0;
vlc_cond_init( p_parent, &p_aout->mixer_signal );
p_aout->b_mixer_active = 0;
vlc_mutex_init( p_parent, &p_aout->mixer_lock );
vlc_object_attach( p_aout, p_parent->p_vlc );
@ -72,7 +71,7 @@ void aout_DeleteInstance( aout_instance_t * p_aout )
{
vlc_mutex_destroy( &p_aout->input_lock );
vlc_cond_destroy( &p_aout->input_signal );
vlc_cond_destroy( &p_aout->mixer_signal );
vlc_mutex_destroy( &p_aout->mixer_lock );
/* Free structure. */
vlc_object_destroy( p_aout );

43
src/audio_output/input.c
View File

@ -2,7 +2,7 @@
* input.c : internal management of input streams for the audio output
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: input.c,v 1.5 2002/08/19 21:31:11 massiot Exp $
* $Id: input.c,v 1.6 2002/08/19 23:12:57 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
@ -42,13 +42,7 @@ static aout_input_t * InputNew( aout_instance_t * p_aout,
if ( p_input == NULL ) return NULL;
vlc_mutex_lock( &p_aout->output.fifo.lock );
while ( p_aout->b_mixer_active )
{
vlc_cond_wait( &p_aout->mixer_signal, &p_aout->output.fifo.lock );
}
p_aout->b_mixer_active = 1;
vlc_mutex_unlock( &p_aout->output.fifo.lock );
vlc_mutex_lock( &p_aout->mixer_lock );
if ( p_aout->i_nb_inputs == 0 )
{
@ -110,18 +104,12 @@ static aout_input_t * InputNew( aout_instance_t * p_aout,
{
aout_MixerNew( p_aout );
}
vlc_mutex_lock( &p_aout->output.fifo.lock );
p_aout->b_mixer_active = 0;
vlc_cond_signal( &p_aout->mixer_signal );
vlc_mutex_unlock( &p_aout->output.fifo.lock );
vlc_mutex_unlock( &p_aout->mixer_lock );
return NULL;
}
vlc_mutex_lock( &p_aout->output.fifo.lock );
p_aout->b_mixer_active = 0;
vlc_cond_signal( &p_aout->mixer_signal );
vlc_mutex_unlock( &p_aout->output.fifo.lock );
vlc_mutex_unlock( &p_aout->mixer_lock );
/* Prepare hints for the buffer allocator. */
p_input->input_alloc.i_alloc_type = AOUT_ALLOC_HEAP;
@ -177,15 +165,7 @@ void aout_InputDelete( aout_instance_t * p_aout, aout_input_t * p_input )
{
int i_input;
msg_Dbg( p_aout, "input 0x%x destroyed", p_input );
vlc_mutex_lock( &p_aout->output.fifo.lock );
while ( p_aout->b_mixer_active )
{
vlc_cond_wait( &p_aout->mixer_signal, &p_aout->output.fifo.lock );
}
p_aout->b_mixer_active = 1;
vlc_mutex_unlock( &p_aout->output.fifo.lock );
vlc_mutex_lock( &p_aout->mixer_lock );
for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
{
@ -206,10 +186,7 @@ void aout_InputDelete( aout_instance_t * p_aout, aout_input_t * p_input )
(AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
p_aout->i_nb_inputs--;
vlc_mutex_lock( &p_aout->output.fifo.lock );
p_aout->b_mixer_active = 0;
vlc_cond_signal( &p_aout->mixer_signal );
vlc_mutex_unlock( &p_aout->output.fifo.lock );
vlc_mutex_unlock( &p_aout->mixer_lock );
aout_FiltersDestroyPipeline( p_aout, p_input->pp_filters,
p_input->i_nb_filters );
@ -222,6 +199,8 @@ void aout_InputDelete( aout_instance_t * p_aout, aout_input_t * p_input )
aout_OutputDelete( p_aout );
aout_MixerDelete( p_aout );
}
msg_Dbg( p_aout, "input 0x%x destroyed", p_input );
}
/*****************************************************************************
@ -252,7 +231,9 @@ void aout_InputPlay( aout_instance_t * p_aout, aout_input_t * p_input,
* happen :). */
msg_Warn( p_aout, "Computed PTS is out of range (%lld), clearing out",
start_date );
vlc_mutex_lock( &p_aout->mixer_lock );
aout_FifoSet( p_aout, &p_input->fifo, 0 );
vlc_mutex_unlock( &p_aout->mixer_lock );
start_date = 0;
}
@ -314,7 +295,9 @@ void aout_InputPlay( aout_instance_t * p_aout, aout_input_t * p_input,
&new_output ) < 0 )
{
msg_Err( p_aout, "couldn't set an input pipeline for resampling" );
vlc_mutex_lock( &p_aout->mixer_lock );
aout_FifoSet( p_aout, &p_input->fifo, 0 );
vlc_mutex_unlock( &p_aout->mixer_lock );
aout_BufferFree( p_buffer );
vlc_mutex_lock( &p_aout->input_lock );
@ -347,7 +330,9 @@ void aout_InputPlay( aout_instance_t * p_aout, aout_input_t * p_input,
/* Adding the start date will be managed by aout_FifoPush(). */
p_buffer->start_date = start_date;
p_buffer->end_date = start_date + duration;
vlc_mutex_lock( &p_aout->mixer_lock );
aout_FifoPush( p_aout, &p_input->fifo, p_buffer );
vlc_mutex_unlock( &p_aout->mixer_lock );
vlc_mutex_lock( &p_aout->input_lock );
p_aout->i_inputs_active--;

175
src/audio_output/mixer.c
View File

@ -2,7 +2,7 @@
* mixer.c : audio output mixing operations
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: mixer.c,v 1.7 2002/08/19 21:54:37 massiot Exp $
* $Id: mixer.c,v 1.8 2002/08/19 23:12:57 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
@ -59,19 +59,17 @@ void aout_MixerDelete( aout_instance_t * p_aout )
}
/*****************************************************************************
* aout_MixerRun: entry point for the mixer & post-filters processing
* MixBuffer: try to prepare one output buffer
*****************************************************************************/
void aout_MixerRun( aout_instance_t * p_aout )
static int MixBuffer( aout_instance_t * p_aout )
{
int i;
aout_buffer_t * p_output_buffer;
mtime_t start_date, end_date;
/* Retrieve the date of the next buffer. We don't use aout_FifoNextStart
* because we need to keep the lock on the FIFO, to prevent the aout
* thread from triggering resampling while we are running. */
vlc_mutex_lock( &p_aout->output.fifo.lock );
start_date = p_aout->output.fifo.end_date;
/* Retrieve the date of the next buffer. */
vlc_mutex_lock( &p_aout->mixer_lock );
start_date = aout_FifoNextStart( p_aout, &p_aout->output.fifo );
if ( start_date != 0 && start_date < mdate() )
{
/* The output is _very_ late. This can only happen if the user
@ -81,11 +79,42 @@ void aout_MixerRun( aout_instance_t * p_aout )
start_date );
start_date = p_aout->output.fifo.end_date = 0;
}
/* See if we have enough data to prepare a new buffer for the audio
* output. First : start date. */
if ( !start_date )
{
/* Find the latest start date available. */
for ( i = 0; i < p_aout->i_nb_inputs; i++ )
{
aout_input_t * p_input = p_aout->pp_inputs[i];
aout_fifo_t * p_fifo = &p_input->fifo;
aout_buffer_t * p_buffer;
p_buffer = p_fifo->p_first;
if ( p_buffer == NULL )
{
break;
}
if ( !start_date || start_date < p_buffer->start_date )
{
start_date = p_buffer->start_date;
}
}
if ( i < p_aout->i_nb_inputs )
{
/* Interrupted before the end... We can't run. */
vlc_mutex_unlock( &p_aout->mixer_lock );
return -1;
}
}
end_date = start_date + (mtime_t)p_aout->output.i_nb_samples * 1000000
/ p_aout->output.output.i_rate;
/* See if we have enough data to prepare a new buffer for the audio
* output. */
/* Check that start_date and end_date are available for all input
* streams. */
for ( i = 0; i < p_aout->i_nb_inputs; i++ )
{
aout_input_t * p_input = p_aout->pp_inputs[i];
@ -94,73 +123,60 @@ void aout_MixerRun( aout_instance_t * p_aout )
mtime_t prev_date;
vlc_bool_t b_drop_buffers;
vlc_mutex_lock( &p_fifo->lock );
p_buffer = p_fifo->p_first;
if ( p_buffer == NULL )
{
vlc_mutex_unlock( &p_fifo->lock );
break;
}
if ( !start_date )
/* Check for the continuity of start_date */
while ( p_buffer != NULL && p_buffer->end_date < start_date )
{
start_date = p_buffer->start_date;
end_date += p_buffer->start_date;
p_input->p_first_byte_to_mix = p_buffer->p_buffer;
aout_buffer_t * p_next = p_buffer->p_next;
msg_Err( p_aout, "the mixer got a packet in the past (%lld)",
start_date - p_buffer->end_date );
aout_BufferFree( p_buffer );
p_fifo->p_first = p_buffer = p_next;
p_input->p_first_byte_to_mix = NULL;
}
else
if ( p_buffer == NULL )
{
/* Check for the continuity of start_date */
while ( p_buffer != NULL && p_buffer->end_date < start_date )
p_fifo->pp_last = &p_fifo->p_first;
break;
}
if ( !AOUT_FMT_NON_LINEAR( &p_aout->mixer.mixer ) )
{
/* Additionally check that p_first_byte_to_mix is well
* located. */
unsigned long i_nb_bytes = (start_date - p_buffer->start_date)
* p_aout->mixer.mixer.i_bytes_per_frame
* p_aout->mixer.mixer.i_rate
/ p_aout->mixer.mixer.i_frame_length
/ 1000000;
ptrdiff_t mixer_nb_bytes;
if ( p_input->p_first_byte_to_mix == NULL )
{
aout_buffer_t * p_next = p_buffer->p_next;
msg_Err( p_aout, "the mixer got a packet in the past (%lld)",
start_date - p_buffer->end_date );
aout_BufferFree( p_buffer );
p_fifo->p_first = p_buffer = p_next;
p_input->p_first_byte_to_mix = NULL;
p_input->p_first_byte_to_mix = p_buffer->p_buffer;
}
if ( p_buffer == NULL )
mixer_nb_bytes = p_input->p_first_byte_to_mix
- p_buffer->p_buffer;
if ( i_nb_bytes + p_aout->mixer.mixer.i_bytes_per_frame
< mixer_nb_bytes ||
i_nb_bytes - p_aout->mixer.mixer.i_bytes_per_frame
> mixer_nb_bytes )
{
p_fifo->pp_last = &p_fifo->p_first;
vlc_mutex_unlock( &p_fifo->lock );
break;
}
msg_Warn( p_aout,
"mixer start isn't output start (%ld)",
i_nb_bytes - mixer_nb_bytes );
if ( !AOUT_FMT_NON_LINEAR( &p_aout->mixer.mixer ) )
{
/* Additionally check that p_first_byte_to_mix is well
* located. */
unsigned long i_nb_bytes = (start_date - p_buffer->start_date)
* p_aout->mixer.mixer.i_bytes_per_frame
* p_aout->mixer.mixer.i_rate
/ p_aout->mixer.mixer.i_frame_length
/ 1000000;
ptrdiff_t mixer_nb_bytes;
if ( p_input->p_first_byte_to_mix == NULL )
{
p_input->p_first_byte_to_mix = p_buffer->p_buffer;
}
mixer_nb_bytes = p_input->p_first_byte_to_mix
- p_buffer->p_buffer;
if ( i_nb_bytes + p_aout->mixer.mixer.i_bytes_per_frame
< mixer_nb_bytes ||
i_nb_bytes - p_aout->mixer.mixer.i_bytes_per_frame
> mixer_nb_bytes )
{
msg_Warn( p_aout,
"mixer start isn't output start (%ld)",
i_nb_bytes - mixer_nb_bytes );
/* Round to the nearest multiple */
i_nb_bytes /= p_aout->mixer.mixer.i_bytes_per_frame;
i_nb_bytes *= p_aout->mixer.mixer.i_bytes_per_frame;
p_input->p_first_byte_to_mix = p_buffer->p_buffer
+ i_nb_bytes;
}
/* Round to the nearest multiple */
i_nb_bytes /= p_aout->mixer.mixer.i_bytes_per_frame;
i_nb_bytes *= p_aout->mixer.mixer.i_bytes_per_frame;
p_input->p_first_byte_to_mix = p_buffer->p_buffer
+ i_nb_bytes;
}
}
@ -180,7 +196,7 @@ void aout_MixerRun( aout_instance_t * p_aout )
if ( prev_date != p_buffer->start_date )
{
msg_Warn( p_aout,
"buffer discontinuity, dropping packets (%lld)",
"buffer hole, dropping packets (%lld)",
p_buffer->start_date - prev_date );
b_drop_buffers = 1;
break;
@ -201,20 +217,16 @@ void aout_MixerRun( aout_instance_t * p_aout )
}
else break;
}
vlc_mutex_unlock( &p_fifo->lock );
if ( p_buffer == NULL ) break;
}
if ( i < p_aout->i_nb_inputs )
{
/* Interrupted before the end... We can't run. */
vlc_mutex_unlock( &p_aout->output.fifo.lock );
return;
vlc_mutex_unlock( &p_aout->mixer_lock );
return -1;
}
p_aout->b_mixer_active = 1;
vlc_mutex_unlock( &p_aout->output.fifo.lock );
/* Run the mixer. */
aout_BufferAlloc( &p_aout->mixer.output_alloc,
((u64)p_aout->output.i_nb_samples * 1000000)
@ -226,22 +238,29 @@ void aout_MixerRun( aout_instance_t * p_aout )
if ( p_output_buffer == NULL )
{
msg_Err( p_aout, "out of memory" );
return;
vlc_mutex_unlock( &p_aout->mixer_lock );
return -1;
}
p_output_buffer->i_nb_samples = p_aout->output.i_nb_samples;
p_output_buffer->i_nb_bytes = p_aout->output.i_nb_samples
* p_aout->output.output.i_bytes_per_frame
/ p_aout->output.output.i_frame_length;
* p_aout->mixer.mixer.i_bytes_per_frame
/ p_aout->mixer.mixer.i_frame_length;
p_output_buffer->start_date = start_date;
p_output_buffer->end_date = end_date;
p_aout->mixer.pf_do_work( p_aout, p_output_buffer );
vlc_mutex_unlock( &p_aout->mixer_lock );
aout_OutputPlay( p_aout, p_output_buffer );
vlc_mutex_lock( &p_aout->output.fifo.lock );
p_aout->b_mixer_active = 0;
vlc_cond_signal( &p_aout->mixer_signal );
vlc_mutex_unlock( &p_aout->output.fifo.lock );
return 0;
}
/*****************************************************************************
* aout_MixerRun: entry point for the mixer & post-filters processing
*****************************************************************************/
void aout_MixerRun( aout_instance_t * p_aout )
{
while( MixBuffer( p_aout ) != -1 );
}

17
src/audio_output/output.c
View File

@ -2,7 +2,7 @@
* output.c : internal management of output streams for the audio output
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: output.c,v 1.7 2002/08/19 21:31:11 massiot Exp $
* $Id: output.c,v 1.8 2002/08/19 23:12:57 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
@ -43,9 +43,7 @@ int aout_OutputNew( aout_instance_t * p_aout,
int i_channels = config_GetInt( p_aout, "aout-channels" );
/* Prepare FIFO. */
vlc_mutex_init( p_aout, &p_aout->output.fifo.lock );
p_aout->output.fifo.p_first = NULL;
p_aout->output.fifo.pp_last = &p_aout->output.fifo.p_first;
aout_FifoInit( p_aout, &p_aout->output.fifo );
p_aout->output.p_module = module_Need( p_aout, "audio output",
psz_name );
@ -151,6 +149,7 @@ void aout_OutputPlay( aout_instance_t * p_aout, aout_buffer_t * p_buffer )
p_aout->output.i_nb_filters,
&p_buffer );
/* Please remember that we have the mixer_lock in this function. */
aout_FifoPush( p_aout, &p_aout->output.fifo, p_buffer );
p_aout->output.pf_play( p_aout );
@ -169,7 +168,7 @@ aout_buffer_t * aout_OutputNextBuffer( aout_instance_t * p_aout,
{
aout_buffer_t * p_buffer;
vlc_mutex_lock( &p_aout->output.fifo.lock );
vlc_mutex_lock( &p_aout->mixer_lock );
p_buffer = p_aout->output.fifo.p_first;
while ( p_buffer != NULL && p_buffer->end_date < start_date )
@ -183,7 +182,9 @@ aout_buffer_t * aout_OutputNextBuffer( aout_instance_t * p_aout,
if ( p_buffer == NULL )
{
p_aout->output.fifo.pp_last = &p_aout->output.fifo.p_first;
vlc_mutex_unlock( &p_aout->output.fifo.lock );
/* Set date to 0, to allow the mixer to send a new buffer ASAP */
p_aout->output.fifo.end_date = 0;
vlc_mutex_unlock( &p_aout->mixer_lock );
msg_Dbg( p_aout, "audio output is starving" );
return NULL;
}
@ -193,7 +194,7 @@ aout_buffer_t * aout_OutputNextBuffer( aout_instance_t * p_aout,
if ( p_buffer->start_date > start_date
+ (p_buffer->end_date - p_buffer->start_date) )
{
vlc_mutex_unlock( &p_aout->output.fifo.lock );
vlc_mutex_unlock( &p_aout->mixer_lock );
msg_Dbg( p_aout, "audio output is starving (%lld)",
p_buffer->start_date - start_date );
return NULL;
@ -222,6 +223,6 @@ aout_buffer_t * aout_OutputNextBuffer( aout_instance_t * p_aout,
p_aout->output.fifo.pp_last = &p_aout->output.fifo.p_first;
}
vlc_mutex_unlock( &p_aout->output.fifo.lock );
vlc_mutex_unlock( &p_aout->mixer_lock );
return p_buffer;
}