X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_consumer.c;h=2837c4cc11a99798570b84382070c7f05f18a5aa;hb=51de85d7a61e44bde5395629af348d9ca96ee13b;hp=6c751aa655fb27f5f6953a47e3b8a2738e16a935;hpb=c63b98c399b13d0672beb9cabba832a71d45a2ea;p=melted

diff --git a/src/framework/mlt_consumer.c b/src/framework/mlt_consumer.c
index 6c751aa..2837c4c 100644
--- a/src/framework/mlt_consumer.c
+++ b/src/framework/mlt_consumer.c
@@ -20,18 +20,87 @@
 
 #include "config.h"
 #include "mlt_consumer.h"
+#include "mlt_factory.h"
+#include "mlt_producer.h"
+#include "mlt_frame.h"
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <sys/time.h>
 
 /** Public final methods
 */
 
 int mlt_consumer_init( mlt_consumer this, void *child )
 {
+	int error = 0;
 	memset( this, 0, sizeof( struct mlt_consumer_s ) );
 	this->child = child;
-	return mlt_service_init( &this->parent, this );
+	error = mlt_service_init( &this->parent, this );
+	if ( error == 0 )
+	{
+		// Get the properties from the service
+		mlt_properties properties = mlt_service_properties( &this->parent );
+
+		// Get the normalisation preference
+		char *normalisation = mlt_environment( "MLT_NORMALISATION" );
+
+		// Deal with normalisation
+		if ( normalisation == NULL || strcmp( normalisation, "NTSC" ) )
+		{
+			mlt_properties_set( properties, "normalisation", "PAL" );
+			mlt_properties_set_double( properties, "fps", 25.0 );
+			mlt_properties_set_int( properties, "width", 720 );
+			mlt_properties_set_int( properties, "height", 576 );
+			mlt_properties_set_int( properties, "progressive", 0 );
+			mlt_properties_set_double( properties, "aspect_ratio", 128.0 / 117.0 );
+		}
+		else
+		{
+			mlt_properties_set( properties, "normalisation", "NTSC" );
+			mlt_properties_set_double( properties, "fps", 30000.0 / 1001.0 );
+			mlt_properties_set_int( properties, "width", 720 );
+			mlt_properties_set_int( properties, "height", 480 );
+			mlt_properties_set_int( properties, "progressive", 0 );
+			mlt_properties_set_double( properties, "aspect_ratio", 72.0 / 79.0 );
+		}
+
+		// Default rescaler for all consumers
+		mlt_properties_set( properties, "rescale", "bilinear" );
+
+		// Default read ahead buffer size
+		mlt_properties_set_int( properties, "buffer", 25 );
+
+		// Default audio frequency and channels
+		mlt_properties_set_int( properties, "frequency", 48000 );
+		mlt_properties_set_int( properties, "channels", 2 );
+
+		// Default of all consumers is real time
+		mlt_properties_set_int( properties, "real_time", 1 );
+
+		// Default to environment test card
+		mlt_properties_set( properties, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
+
+		// Hmm - default all consumers to yuv422 :-/
+		this->format = mlt_image_yuv422;
+	}
+	return error;
+}
+
+/** Create a new consumer.
+*/
+
+mlt_consumer mlt_consumer_new( )
+{
+	// Create the memory for the structure
+	mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
+
+	// Initialise it
+	if ( this != NULL )
+		mlt_consumer_init( this, NULL );
+
+	// Return it
+	return this;
 }
 
 /** Get the parent service object.
@@ -63,18 +132,364 @@ int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
 
 int mlt_consumer_start( mlt_consumer this )
 {
+	// Get the properies
+	mlt_properties properties = mlt_consumer_properties( this );
+
+	// Determine if there's a test card producer
+	char *test_card = mlt_properties_get( properties, "test_card" );
+
+	// Deal with it now.
+	if ( test_card != NULL )
+	{
+		if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
+		{
+			// Create a test card producer
+			mlt_producer producer = mlt_factory_producer( NULL, test_card );
+
+			// Do we have a producer
+			if ( producer != NULL )
+			{
+				// Test card should loop I guess...
+				mlt_properties_set( mlt_producer_properties( producer ), "eof", "loop" );
+
+				// Set the test card on the consumer
+				mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
+			}
+
+			// Check and run an ante command
+			if ( mlt_properties_get( properties, "ante" ) )
+				system( mlt_properties_get( properties, "ante" ) );
+		}
+	}
+	else
+	{
+		// Allow the hash table to speed things up
+		mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
+	}
+
+	// Set the real_time preference
+	this->real_time = mlt_properties_get_int( properties, "real_time" );
+
+	// Start the service
 	if ( this->start != NULL )
 		return this->start( this );
+
 	return 0;
 }
 
+/** Protected method for consumer to get frames from connected service
+*/
+
+mlt_frame mlt_consumer_get_frame( mlt_consumer this )
+{
+	// Frame to return
+	mlt_frame frame = NULL;
+
+	// Get the service assoicated to the consumer
+	mlt_service service = mlt_consumer_service( this );
+
+	// Get the frame
+	if ( mlt_service_get_frame( service, &frame, 0 ) == 0 )
+	{
+		// Get the consumer properties
+		mlt_properties properties = mlt_consumer_properties( this );
+
+		// Get the frame properties
+		mlt_properties frame_properties = mlt_frame_properties( frame );
+
+		// Get the test card producer
+		mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
+
+		// Attach the test frame producer to it.
+		if ( test_card != NULL )
+			mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
+
+		// Attach the rescale property
+		mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
+
+		// Aspect ratio and other jiggery pokery
+		mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
+		mlt_properties_set_int( frame_properties, "consumer_progressive", mlt_properties_get_int( properties, "progressive" ) );
+		mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "deinterlace" ) );
+	}
+
+	// Return the frame
+	return frame;
+}
+
+static inline long time_difference( struct timeval *time1 )
+{
+	struct timeval time2;
+	time2.tv_sec = time1->tv_sec;
+	time2.tv_usec = time1->tv_usec;
+	gettimeofday( time1, NULL );
+	return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
+}
+
+static void *consumer_read_ahead_thread( void *arg )
+{
+	// The argument is the consumer
+	mlt_consumer this = arg;
+
+	// Get the properties of the consumer
+	mlt_properties properties = mlt_consumer_properties( this );
+
+	// Get the width and height
+	int width = mlt_properties_get_int( properties, "width" );
+	int height = mlt_properties_get_int( properties, "height" );
+
+	// See if video is turned off
+	int video_off = mlt_properties_get_int( properties, "video_off" );
+
+	// Get the audio settings
+	mlt_audio_format afmt = mlt_audio_pcm;
+	int counter = 0;
+	double fps = mlt_properties_get_double( properties, "fps" );
+	int channels = mlt_properties_get_int( properties, "channels" );
+	int frequency = mlt_properties_get_int( properties, "frequency" );
+	int samples = 0;
+	int16_t *pcm = NULL;
+
+	// See if audio is turned off
+	int audio_off = mlt_properties_get_int( properties, "audio_off" );
+
+	// Get the maximum size of the buffer
+	int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
+
+	// General frame variable
+	mlt_frame frame = NULL;
+	uint8_t *image = NULL;
+
+	// Time structures
+	struct timeval ante;
+
+	// Average time for get_frame and get_image
+	int count = 1;
+	int skipped = 0;
+	int64_t time_wait = 0;
+	int64_t time_frame = 0;
+	int64_t time_process = 0;
+	int skip_next = 0;
+
+	// Get the first frame
+	frame = mlt_consumer_get_frame( this );
+
+	// Get the image of the first frame
+	if ( !video_off )
+		mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
+
+	if ( !audio_off )
+	{
+		samples = mlt_sample_calculator( fps, frequency, counter++ );
+		mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
+		frame->get_audio = NULL;
+	}
+
+	mlt_properties_set_int( mlt_frame_properties( frame ), "rendered", 1 );
+
+	// Get the starting time (can ignore the times above)
+	gettimeofday( &ante, NULL );
+
+	// Continue to read ahead
+	while ( this->ahead )
+	{
+		// Put the current frame into the queue
+		pthread_mutex_lock( &this->mutex );
+		while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
+			pthread_cond_wait( &this->cond, &this->mutex );
+		mlt_deque_push_back( this->queue, frame );
+		pthread_cond_broadcast( &this->cond );
+		pthread_mutex_unlock( &this->mutex );
+		time_wait += time_difference( &ante );
+
+		// Get the next frame
+		frame = mlt_consumer_get_frame( this );
+		time_frame += time_difference( &ante );
+
+		// Increment the count
+		count ++;
+
+		// All non normal playback frames should be shown
+		if ( mlt_properties_get_int( mlt_frame_properties( frame ), "_speed" ) != 1 )
+		{
+			skipped = 0;
+			time_frame = 0;
+			time_process = 0;
+			time_wait = 0;
+			count = 1;
+			skip_next = 0;
+		}
+
+		// Get the image
+		if ( !skip_next )
+		{
+			// Get the image, mark as rendered and time it
+			if ( !video_off )
+				mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
+			mlt_properties_set_int( mlt_frame_properties( frame ), "rendered", 1 );
+
+			// Reset the skipped count
+			skipped = 0;
+		}
+		else
+		{
+			// Increment the number of sequentially skipped frames
+			skipped ++;
+			skip_next = 0;
+
+			// If we've reached an unacceptable level, reset everything
+			if ( skipped > 10 )
+			{
+				skipped = 0;
+				time_frame = 0;
+				time_process = 0;
+				time_wait = 0;
+				count = 1;
+			}
+		}
+
+		// Always process audio
+		if ( !audio_off )
+		{
+			samples = mlt_sample_calculator( fps, frequency, counter++ );
+			mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
+			frame->get_audio = NULL;
+		}
+
+		// Increment the time take for this frame
+		time_process += time_difference( &ante );
+
+		// Determine if the next frame should be skipped
+		if ( mlt_deque_count( this->queue ) <= 5 && ( ( time_wait + time_frame + time_process ) / count ) > 40000 )
+			skip_next = 1;
+	}
+
+	// Remove the last frame
+	mlt_frame_close( frame );
+
+	return NULL;
+}
+
+static void consumer_read_ahead_start( mlt_consumer this )
+{
+	pthread_attr_t thread_attributes;
+	
+	// We're running now
+	this->ahead = 1;
+
+	// Create the frame queue
+	this->queue = mlt_deque_init( );
+
+	// Create the mutex
+	pthread_mutex_init( &this->mutex, NULL );
+
+	// Create the condition
+	pthread_cond_init( &this->cond, NULL );
+
+	// Inherit the scheduling priority
+	pthread_attr_init( &thread_attributes );
+	pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
+	
+	// Create the read ahead 
+	pthread_create( &this->ahead_thread, &thread_attributes, consumer_read_ahead_thread, this );
+}
+
+static void consumer_read_ahead_stop( mlt_consumer this )
+{
+	// Make sure we're running
+	if ( this->ahead )
+	{
+		// Inform thread to stop
+		this->ahead = 0;
+
+		// Broadcast to the condition in case it's waiting
+		pthread_mutex_lock( &this->mutex );
+		pthread_cond_broadcast( &this->cond );
+		pthread_mutex_unlock( &this->mutex );
+
+		// Join the thread
+		pthread_join( this->ahead_thread, NULL );
+
+		// Destroy the mutex
+		pthread_mutex_destroy( &this->mutex );
+
+		// Destroy the condition
+		pthread_cond_destroy( &this->cond );
+
+		// Wipe the queue
+		while ( mlt_deque_count( this->queue ) )
+			mlt_frame_close( mlt_deque_pop_back( this->queue ) );
+
+		// Close the queue
+		mlt_deque_close( this->queue );
+	}
+}
+
+mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
+{
+	// Frame to return
+	mlt_frame frame = NULL;
+
+	// Get the properties
+	mlt_properties properties = mlt_consumer_properties( this );
+
+	// Check if the user has requested real time or not
+	if ( this->real_time )
+	{
+		int size = 1;
+
+		// Is the read ahead running?
+		if ( this->ahead == 0 )
+		{
+			int buffer = mlt_properties_get_int( properties, "buffer" );
+			consumer_read_ahead_start( this );
+			if ( buffer > 1 )
+				size = buffer;
+		}
+	
+		// Get frame from queue
+		pthread_mutex_lock( &this->mutex );
+		while( this->ahead && mlt_deque_count( this->queue ) < size )
+			pthread_cond_wait( &this->cond, &this->mutex );
+		frame = mlt_deque_pop_front( this->queue );
+		pthread_cond_broadcast( &this->cond );
+		pthread_mutex_unlock( &this->mutex );
+	}
+	else
+	{
+		// Get the frame in non real time
+		frame = mlt_consumer_get_frame( this );
+
+		// This isn't true, but from the consumers perspective it is
+		mlt_properties_set_int( mlt_frame_properties( frame ), "rendered", 1 );
+	}
+
+	return frame;
+}
+
 /** Stop the consumer.
 */
 
 int mlt_consumer_stop( mlt_consumer this )
 {
+	// Get the properies
+	mlt_properties properties = mlt_consumer_properties( this );
+
+	// Stop the consumer
 	if ( this->stop != NULL )
-		return this->stop( this );
+		this->stop( this );
+
+	// Check if the user has requested real time or not and stop if necessary
+	if ( mlt_properties_get_int( properties, "real_time" ) )
+		consumer_read_ahead_stop( this );
+
+	// Kill the test card
+	mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
+
+	// Check and run a post command
+	if ( mlt_properties_get( properties, "post" ) )
+		system( mlt_properties_get( properties, "post" ) );
+
 	return 0;
 }
 
@@ -83,8 +498,10 @@ int mlt_consumer_stop( mlt_consumer this )
 
 int mlt_consumer_is_stopped( mlt_consumer this )
 {
+	// Check if the consumer is stopped
 	if ( this->is_stopped != NULL )
 		return this->is_stopped( this );
+
 	return 0;
 }
 
@@ -105,4 +522,3 @@ void mlt_consumer_close( mlt_consumer this )
 	else
 		mlt_service_close( &this->parent );
 }
-