/*
* consumer_sdl_audio.c -- A Simple DirectMedia Layer audio-only consumer
- * Copyright (C) 2009, 2010 Ushodaya Enterprises Limited
+ * Copyright (C) 2009-2012 Ushodaya Enterprises Limited
* Author: Dan Dennedy <dan@dennedy.org>
*
* This library is free software; you can redistribute it and/or
static int consumer_is_stopped( mlt_consumer parent );
static void consumer_close( mlt_consumer parent );
static void *consumer_thread( void * );
-static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer this, char *name );
+static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer self, char *name );
/** This is what will be called by the factory - anything can be passed in
via the argument, but keep it simple.
mlt_consumer consumer_sdl_audio_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
{
// Create the consumer object
- consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
+ consumer_sdl self = calloc( sizeof( struct consumer_sdl_s ), 1 );
// If no malloc'd and consumer init ok
- if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
+ if ( self != NULL && mlt_consumer_init( &self->parent, self, profile ) == 0 )
{
// Create the queue
- this->queue = mlt_deque_init( );
+ self->queue = mlt_deque_init( );
// Get the parent consumer object
- mlt_consumer parent = &this->parent;
+ mlt_consumer parent = &self->parent;
// We have stuff to clean up, so override the close method
parent->close = consumer_close;
// get a handle on properties
mlt_service service = MLT_CONSUMER_SERVICE( parent );
- this->properties = MLT_SERVICE_PROPERTIES( service );
+ self->properties = MLT_SERVICE_PROPERTIES( service );
// Set the default volume
- mlt_properties_set_double( this->properties, "volume", 1.0 );
+ mlt_properties_set_double( self->properties, "volume", 1.0 );
// This is the initialisation of the consumer
- pthread_mutex_init( &this->audio_mutex, NULL );
- pthread_cond_init( &this->audio_cond, NULL);
- pthread_mutex_init( &this->video_mutex, NULL );
- pthread_cond_init( &this->video_cond, NULL);
+ pthread_mutex_init( &self->audio_mutex, NULL );
+ pthread_cond_init( &self->audio_cond, NULL);
+ pthread_mutex_init( &self->video_mutex, NULL );
+ pthread_cond_init( &self->video_cond, NULL);
// Default scaler (for now we'll use nearest)
- mlt_properties_set( this->properties, "rescale", "nearest" );
- mlt_properties_set( this->properties, "deinterlace_method", "onefield" );
+ mlt_properties_set( self->properties, "rescale", "nearest" );
+ mlt_properties_set( self->properties, "deinterlace_method", "onefield" );
// Default buffer for low latency
- mlt_properties_set_int( this->properties, "buffer", 1 );
+ mlt_properties_set_int( self->properties, "buffer", 1 );
// Default audio buffer
- mlt_properties_set_int( this->properties, "audio_buffer", 2048 );
+ mlt_properties_set_int( self->properties, "audio_buffer", 2048 );
// Ensure we don't join on a non-running object
- this->joined = 1;
+ self->joined = 1;
// Allow thread to be started/stopped
parent->start = consumer_start;
parent->is_stopped = consumer_is_stopped;
// Initialize the refresh handler
- pthread_cond_init( &this->refresh_cond, NULL );
- pthread_mutex_init( &this->refresh_mutex, NULL );
- mlt_events_listen( MLT_CONSUMER_PROPERTIES( parent ), this, "property-changed", ( mlt_listener )consumer_refresh_cb );
+ pthread_cond_init( &self->refresh_cond, NULL );
+ pthread_mutex_init( &self->refresh_mutex, NULL );
+ mlt_events_listen( MLT_CONSUMER_PROPERTIES( parent ), self, "property-changed", ( mlt_listener )consumer_refresh_cb );
// Return the consumer produced
return parent;
}
// malloc or consumer init failed
- free( this );
+ free( self );
// Indicate failure
return NULL;
{
if ( !strcmp( name, "refresh" ) )
{
- consumer_sdl this = parent->child;
- pthread_mutex_lock( &this->refresh_mutex );
- this->refresh_count = this->refresh_count <= 0 ? 1 : this->refresh_count + 1;
- pthread_cond_broadcast( &this->refresh_cond );
- pthread_mutex_unlock( &this->refresh_mutex );
+ consumer_sdl self = parent->child;
+ pthread_mutex_lock( &self->refresh_mutex );
+ self->refresh_count = self->refresh_count <= 0 ? 1 : self->refresh_count + 1;
+ pthread_cond_broadcast( &self->refresh_cond );
+ pthread_mutex_unlock( &self->refresh_mutex );
}
}
int consumer_start( mlt_consumer parent )
{
- consumer_sdl this = parent->child;
+ consumer_sdl self = parent->child;
- if ( !this->running )
+ if ( !self->running )
{
consumer_stop( parent );
return -1;
}
- this->running = 1;
- this->joined = 0;
- pthread_create( &this->thread, NULL, consumer_thread, this );
+ self->running = 1;
+ self->joined = 0;
+ pthread_create( &self->thread, NULL, consumer_thread, self );
}
return 0;
int consumer_stop( mlt_consumer parent )
{
// Get the actual object
- consumer_sdl this = parent->child;
+ consumer_sdl self = parent->child;
- if ( this->running && !this->joined )
+ if ( self->running && !self->joined )
{
// Kill the thread and clean up
- this->joined = 1;
- this->running = 0;
+ self->joined = 1;
+ self->running = 0;
// Unlatch the consumer thread
- pthread_mutex_lock( &this->refresh_mutex );
- pthread_cond_broadcast( &this->refresh_cond );
- pthread_mutex_unlock( &this->refresh_mutex );
+ pthread_mutex_lock( &self->refresh_mutex );
+ pthread_cond_broadcast( &self->refresh_cond );
+ pthread_mutex_unlock( &self->refresh_mutex );
// Cleanup the main thread
#ifndef WIN32
- if ( this->thread )
+ if ( self->thread )
#endif
- pthread_join( this->thread, NULL );
+ pthread_join( self->thread, NULL );
// Unlatch the video thread
- pthread_mutex_lock( &this->video_mutex );
- pthread_cond_broadcast( &this->video_cond );
- pthread_mutex_unlock( &this->video_mutex );
+ pthread_mutex_lock( &self->video_mutex );
+ pthread_cond_broadcast( &self->video_cond );
+ pthread_mutex_unlock( &self->video_mutex );
// Unlatch the audio callback
- pthread_mutex_lock( &this->audio_mutex );
- pthread_cond_broadcast( &this->audio_cond );
- pthread_mutex_unlock( &this->audio_mutex );
+ pthread_mutex_lock( &self->audio_mutex );
+ pthread_cond_broadcast( &self->audio_cond );
+ pthread_mutex_unlock( &self->audio_mutex );
SDL_QuitSubSystem( SDL_INIT_AUDIO );
}
int consumer_is_stopped( mlt_consumer parent )
{
- consumer_sdl this = parent->child;
- return !this->running;
+ consumer_sdl self = parent->child;
+ return !self->running;
}
static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
{
- consumer_sdl this = udata;
+ consumer_sdl self = udata;
// Get the volume
- double volume = mlt_properties_get_double( this->properties, "volume" );
+ double volume = mlt_properties_get_double( self->properties, "volume" );
- pthread_mutex_lock( &this->audio_mutex );
+ pthread_mutex_lock( &self->audio_mutex );
// Block until audio received
- while ( this->running && len > this->audio_avail )
- pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
+ while ( self->running && len > self->audio_avail )
+ pthread_cond_wait( &self->audio_cond, &self->audio_mutex );
- if ( this->audio_avail >= len )
+ if ( self->audio_avail >= len )
{
// Place in the audio buffer
if ( volume != 1.0 )
- SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
+ SDL_MixAudio( stream, self->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
else
- memcpy( stream, this->audio_buffer, len );
+ memcpy( stream, self->audio_buffer, len );
// Remove len from the audio available
- this->audio_avail -= len;
+ self->audio_avail -= len;
// Remove the samples
- memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
+ memmove( self->audio_buffer, self->audio_buffer + len, self->audio_avail );
}
else
{
memset( stream, 0, len );
// Mix the audio
- SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
+ SDL_MixAudio( stream, self->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
// No audio left
- this->audio_avail = 0;
+ self->audio_avail = 0;
}
// We're definitely playing now
- this->playing = 1;
+ self->playing = 1;
- pthread_cond_broadcast( &this->audio_cond );
- pthread_mutex_unlock( &this->audio_mutex );
+ pthread_cond_broadcast( &self->audio_cond );
+ pthread_mutex_unlock( &self->audio_mutex );
}
-static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
+static int consumer_play_audio( consumer_sdl self, mlt_frame frame, int init_audio, int *duration )
{
// Get the properties of this consumer
- mlt_properties properties = this->properties;
+ mlt_properties properties = self->properties;
mlt_audio_format afmt = mlt_audio_s16;
// Set the preferred params of the test card signal
int frequency = mlt_properties_get_int( properties, "frequency" );
static int counter = 0;
- int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
+ int samples = mlt_sample_calculator( mlt_properties_get_double( self->properties, "fps" ), frequency, counter++ );
int16_t *pcm;
int bytes;
if ( mlt_properties_get_int( properties, "audio_off" ) )
{
- this->playing = 1;
+ self->playing = 1;
init_audio = 1;
return init_audio;
}
// specify audio format
memset( &request, 0, sizeof( SDL_AudioSpec ) );
- this->playing = 0;
+ self->playing = 0;
request.freq = frequency;
request.format = AUDIO_S16SYS;
request.channels = channels;
request.samples = audio_buffer;
request.callback = sdl_fill_audio;
- request.userdata = (void *)this;
+ request.userdata = (void *)self;
if ( SDL_OpenAudio( &request, &got ) != 0 )
{
- mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
+ mlt_log_error( MLT_CONSUMER_SERVICE( self ), "SDL failed to open audio: %s\n", SDL_GetError() );
init_audio = 2;
}
else if ( got.size != 0 )
{
mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
bytes = ( samples * channels * 2 );
- pthread_mutex_lock( &this->audio_mutex );
- while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
- pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
- if ( this->running )
+ pthread_mutex_lock( &self->audio_mutex );
+ while ( self->running && bytes > ( sizeof( self->audio_buffer) - self->audio_avail ) )
+ pthread_cond_wait( &self->audio_cond, &self->audio_mutex );
+ if ( self->running )
{
if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
- memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
+ memcpy( &self->audio_buffer[ self->audio_avail ], pcm, bytes );
else
- memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
- this->audio_avail += bytes;
+ memset( &self->audio_buffer[ self->audio_avail ], 0, bytes );
+ self->audio_avail += bytes;
}
- pthread_cond_broadcast( &this->audio_cond );
- pthread_mutex_unlock( &this->audio_mutex );
+ pthread_cond_broadcast( &self->audio_cond );
+ pthread_mutex_unlock( &self->audio_mutex );
}
else
{
- this->playing = 1;
+ self->playing = 1;
}
return init_audio;
}
-static int consumer_play_video( consumer_sdl this, mlt_frame frame )
+static int consumer_play_video( consumer_sdl self, mlt_frame frame )
{
// Get the properties of this consumer
- mlt_properties properties = this->properties;
- if ( this->running && !mlt_consumer_is_stopped( &this->parent ) )
+ mlt_properties properties = self->properties;
+ if ( self->running && !mlt_consumer_is_stopped( &self->parent ) )
mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
return 0;
static void *video_thread( void *arg )
{
// Identify the arg
- consumer_sdl this = arg;
+ consumer_sdl self = arg;
// Obtain time of thread start
struct timeval now;
double speed = 0;
// Get real time flag
- int real_time = mlt_properties_get_int( this->properties, "real_time" );
+ int real_time = mlt_properties_get_int( self->properties, "real_time" );
// Get the current time
gettimeofday( &now, NULL );
// Determine start time
start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
- while ( this->running )
+ while ( self->running )
{
// Pop the next frame
- pthread_mutex_lock( &this->video_mutex );
- next = mlt_deque_pop_front( this->queue );
- while ( next == NULL && this->running )
+ pthread_mutex_lock( &self->video_mutex );
+ next = mlt_deque_pop_front( self->queue );
+ while ( next == NULL && self->running )
{
- pthread_cond_wait( &this->video_cond, &this->video_mutex );
- next = mlt_deque_pop_front( this->queue );
+ pthread_cond_wait( &self->video_cond, &self->video_mutex );
+ next = mlt_deque_pop_front( self->queue );
}
- pthread_mutex_unlock( &this->video_mutex );
+ pthread_mutex_unlock( &self->video_mutex );
- if ( !this->running || next == NULL ) break;
+ if ( !self->running || next == NULL ) break;
// Get the properties
properties = MLT_FRAME_PROPERTIES( next );
elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
// See if we have to delay the display of the current frame
- if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
+ if ( mlt_properties_get_int( properties, "rendered" ) == 1 && self->running )
{
// Obtain the scheduled playout time
int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
}
// Show current frame if not too old
- if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
- consumer_play_video( this, next );
+ if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( self->queue ) < 2 ) )
+ consumer_play_video( self, next );
// If the queue is empty, recalculate start to allow build up again
- if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
+ if ( real_time && ( mlt_deque_count( self->queue ) == 0 && speed == 1.0 ) )
{
gettimeofday( &now, NULL );
start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
if ( next != NULL )
mlt_frame_close( next );
- mlt_consumer_stopped( &this->parent );
+ mlt_consumer_stopped( &self->parent );
return NULL;
}
static void *consumer_thread( void *arg )
{
// Identify the arg
- consumer_sdl this = arg;
+ consumer_sdl self = arg;
// Get the consumer
- mlt_consumer consumer = &this->parent;
+ mlt_consumer consumer = &self->parent;
// Get the properties
mlt_properties consumer_props = MLT_CONSUMER_PROPERTIES( consumer );
int64_t playtime = 0;
struct timespec tm = { 0, 100000 };
// int last_position = -1;
- this->refresh_count = 0;
+ self->refresh_count = 0;
// Loop until told not to
- while( this->running )
+ while( self->running )
{
// Get a frame from the attached producer
frame = mlt_consumer_rt_frame( consumer );
mlt_events_unblock( consumer_props, consumer_props );
// Play audio
- init_audio = consumer_play_audio( this, frame, init_audio, &duration );
+ init_audio = consumer_play_audio( self, frame, init_audio, &duration );
// Determine the start time now
- if ( this->playing && init_video )
+ if ( self->playing && init_video )
{
// Create the video thread
- pthread_create( &thread, NULL, video_thread, this );
+ pthread_create( &thread, NULL, video_thread, self );
// Video doesn't need to be initialised any more
init_video = 0;
// Set playtime for this frame
mlt_properties_set_int( properties, "playtime", playtime );
- while ( this->running && speed != 0 && mlt_deque_count( this->queue ) > 15 )
+ while ( self->running && speed != 0 && mlt_deque_count( self->queue ) > 15 )
nanosleep( &tm, NULL );
// Push this frame to the back of the queue
- if ( this->running && speed )
+ if ( self->running && speed )
{
- pthread_mutex_lock( &this->video_mutex );
- mlt_deque_push_back( this->queue, frame );
- pthread_cond_broadcast( &this->video_cond );
- pthread_mutex_unlock( &this->video_mutex );
+ pthread_mutex_lock( &self->video_mutex );
+ mlt_deque_push_back( self->queue, frame );
+ pthread_cond_broadcast( &self->video_cond );
+ pthread_mutex_unlock( &self->video_mutex );
// Calculate the next playtime
playtime += ( duration * 1000 );
}
- else if ( this->running )
+ else if ( self->running )
{
- pthread_mutex_lock( &this->refresh_mutex );
- if ( refresh == 0 && this->refresh_count <= 0 )
+ pthread_mutex_lock( &self->refresh_mutex );
+ if ( refresh == 0 && self->refresh_count <= 0 )
{
- consumer_play_video( this, frame );
- pthread_cond_wait( &this->refresh_cond, &this->refresh_mutex );
+ consumer_play_video( self, frame );
+ pthread_cond_wait( &self->refresh_cond, &self->refresh_mutex );
}
mlt_frame_close( frame );
- this->refresh_count --;
- pthread_mutex_unlock( &this->refresh_mutex );
+ self->refresh_count --;
+ pthread_mutex_unlock( &self->refresh_mutex );
}
else
{
// Kill the video thread
if ( init_video == 0 )
{
- pthread_mutex_lock( &this->video_mutex );
- pthread_cond_broadcast( &this->video_cond );
- pthread_mutex_unlock( &this->video_mutex );
+ pthread_mutex_lock( &self->video_mutex );
+ pthread_cond_broadcast( &self->video_cond );
+ pthread_mutex_unlock( &self->video_mutex );
pthread_join( thread, NULL );
}
- while( mlt_deque_count( this->queue ) )
- mlt_frame_close( mlt_deque_pop_back( this->queue ) );
+ while( mlt_deque_count( self->queue ) )
+ mlt_frame_close( mlt_deque_pop_back( self->queue ) );
- this->audio_avail = 0;
+ self->audio_avail = 0;
return NULL;
}
static void consumer_close( mlt_consumer parent )
{
// Get the actual object
- consumer_sdl this = parent->child;
+ consumer_sdl self = parent->child;
// Stop the consumer
mlt_consumer_stop( parent );
mlt_consumer_close( parent );
// Close the queue
- mlt_deque_close( this->queue );
+ mlt_deque_close( self->queue );
// Destroy mutexes
- pthread_mutex_destroy( &this->audio_mutex );
- pthread_cond_destroy( &this->audio_cond );
- pthread_mutex_destroy( &this->video_mutex );
- pthread_cond_destroy( &this->video_cond );
- pthread_mutex_destroy( &this->refresh_mutex );
- pthread_cond_destroy( &this->refresh_cond );
+ pthread_mutex_destroy( &self->audio_mutex );
+ pthread_cond_destroy( &self->audio_cond );
+ pthread_mutex_destroy( &self->video_mutex );
+ pthread_cond_destroy( &self->video_cond );
+ pthread_mutex_destroy( &self->refresh_mutex );
+ pthread_cond_destroy( &self->refresh_cond );
// Finally clean up this
- free( this );
+ free( self );
}
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