示例#1
0
static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
{
	// Generate a frame
	*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
	mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( producer ) );

	if ( *frame != NULL )
	{
		// Obtain properties of frame
		mlt_properties frame_properties = MLT_FRAME_PROPERTIES( *frame );

		// Update time code on the frame
		mlt_frame_set_position( *frame, mlt_producer_frame( producer ) );

		mlt_properties_set_int( frame_properties, "progressive", 1 );
		mlt_properties_set_double( frame_properties, "aspect_ratio", mlt_profile_sar( profile ) );
		mlt_properties_set_int( frame_properties, "meta.media.width", profile->width );
		mlt_properties_set_int( frame_properties, "meta.media.height", profile->height );

		// Configure callbacks
		mlt_frame_push_service( *frame, producer );
		mlt_frame_push_get_image( *frame, producer_get_image );
		mlt_frame_push_audio( *frame, producer );
		mlt_frame_push_audio( *frame, producer_get_audio );
	}

	// Calculate the next time code
	mlt_producer_prepare_next( producer );

	return 0;
}
示例#2
0
static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index )
{
	// Get the mutiltrack object
	mlt_multitrack self = parent->child;

	// Check if we have a track for this index
	if ( index >= 0 && index < self->count && self->list[ index ] != NULL )
	{
		// Get the producer for this track
		mlt_producer producer = self->list[ index ]->producer;

		// Get the track hide property
		int hide = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( producer ) ), "hide" );

		// Obtain the current position
		mlt_position position = mlt_producer_frame( parent );

		// Get the parent properties
		mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( parent );

		// Get the speed
		double speed = mlt_properties_get_double( producer_properties, "_speed" );

		// Make sure we're at the same point
		mlt_producer_seek( producer, position );

		// Get the frame from the producer
		mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), frame, 0 );

		// Indicate speed of this producer
		mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
		mlt_properties_set_double( properties, "_speed", speed );
		mlt_frame_set_position( *frame, position );
		mlt_properties_set_int( properties, "hide", hide );
	}
	else
	{
		// Generate a test frame
		*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( parent ) );

		// Update position on the frame we're creating
		mlt_frame_set_position( *frame, mlt_producer_position( parent ) );

		// Move on to the next frame
		if ( index >= self->count )
		{
			// Let tractor know if we've reached the end
			mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "last_track", 1 );

			// Move to the next frame
			mlt_producer_prepare_next( parent );
		}
	}

	return 0;
}
示例#3
0
文件: producer_kino.c 项目: Enlik/mlt
static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
{
	producer_kino this = producer->child;
	uint8_t *data = mlt_pool_alloc( FRAME_SIZE_625_50 );
	
	// Obtain the current frame number
	uint64_t position = mlt_producer_frame( producer );
	
	// Create an empty frame
	*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );

	// Seek and fetch
	if ( kino_wrapper_get_frame( this->wrapper, data, position ) )
	{
		// Get the frames properties
		mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );

		// Determine if we're PAL or NTSC
		int is_pal = kino_wrapper_is_pal( this->wrapper );

		// Pass the dv data
		mlt_properties_set_data( properties, "dv_data", data, FRAME_SIZE_625_50, ( mlt_destructor )mlt_pool_release, NULL );

		// Update other info on the frame
		mlt_properties_set_int( properties, "width", 720 );
		mlt_properties_set_int( properties, "height", is_pal ? 576 : 480 );
		mlt_properties_set_int( properties, "top_field_first", is_pal ? 0 : ( data[ 5 ] & 0x07 ) == 0 ? 0 : 1 );
	}
	else
	{
		mlt_pool_release( data );
	}

	// Update timecode on the frame we're creating
	mlt_frame_set_position( *frame, mlt_producer_position( producer ) );

	// Calculate the next timecode
	mlt_producer_prepare_next( producer );

	return 0;
}
示例#4
0
文件: mlt_tractor.c 项目: elfring/mlt
static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int track )
{
	mlt_tractor self = parent->child;

	// We only respond to the first track requests
	if ( track == 0 && self->producer != NULL )
	{
		int i = 0;
		int done = 0;
		mlt_frame temp = NULL;
		int count = 0;
		int image_count = 0;

		// Get the properties of the parent producer
		mlt_properties properties = MLT_PRODUCER_PROPERTIES( parent );

		// Try to obtain the multitrack associated to the tractor
		mlt_multitrack multitrack = mlt_properties_get_data( properties, "multitrack", NULL );

		// Or a specific producer
		mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );

		// Determine whether this tractor feeds to the consumer or stops here
		int global_feed = mlt_properties_get_int( properties, "global_feed" );

		// If we don't have one, we're in trouble...
		if ( multitrack != NULL )
		{
			// The output frame will hold the 'global' data feeds (ie: those which are targetted for the final frame)
			mlt_deque data_queue = mlt_deque_init( );

			// Used to garbage collect all frames
			char label[ 30 ];

			// Get the id of the tractor
			char *id = mlt_properties_get( properties, "_unique_id" );

			// Will be used to store the frame properties object
			mlt_properties frame_properties = NULL;

			// We'll store audio and video frames to use here
			mlt_frame audio = NULL;
			mlt_frame video = NULL;
			mlt_frame first_video = NULL;

			// Temporary properties
			mlt_properties temp_properties = NULL;

			// Get the multitrack's producer
			mlt_producer target = MLT_MULTITRACK_PRODUCER( multitrack );
			mlt_producer_seek( target, mlt_producer_frame( parent ) );
			mlt_producer_set_speed( target, mlt_producer_get_speed( parent ) );

			// We will create one frame and attach everything to it
			*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( parent ) );

			// Get the properties of the frame
			frame_properties = MLT_FRAME_PROPERTIES( *frame );

			// Loop through each of the tracks we're harvesting
			for ( i = 0; !done; i ++ )
			{
				// Get a frame from the producer
				mlt_service_get_frame( self->producer, &temp, i );

				// Get the temporary properties
				temp_properties = MLT_FRAME_PROPERTIES( temp );

				// Pass all unique meta properties from the producer's frame to the new frame
				mlt_properties_lock( temp_properties );
				int props_count = mlt_properties_count( temp_properties );
				int j;
				for ( j = 0; j < props_count; j ++ )
				{
					char *name = mlt_properties_get_name( temp_properties, j );
					if ( !strncmp( name, "meta.", 5 ) && !mlt_properties_get( frame_properties, name ) )
						mlt_properties_set( frame_properties, name, mlt_properties_get_value( temp_properties, j ) );
				}
				mlt_properties_unlock( temp_properties );

				// Copy the format conversion virtual functions
				if ( ! (*frame)->convert_image && temp->convert_image )
					(*frame)->convert_image = temp->convert_image;
				if ( ! (*frame)->convert_audio && temp->convert_audio )
					(*frame)->convert_audio = temp->convert_audio;

				// Check for last track
				done = mlt_properties_get_int( temp_properties, "last_track" );

				// Handle fx only tracks
				if ( mlt_properties_get_int( temp_properties, "fx_cut" ) )
				{
					int hide = ( video == NULL ? 1 : 0 ) | ( audio == NULL ? 2 : 0 );
					mlt_properties_set_int( temp_properties, "hide", hide );
				}

				// We store all frames with a destructor on the output frame
				sprintf( label, "_%s_%d", id, count ++ );
				mlt_properties_set_data( frame_properties, label, temp, 0, ( mlt_destructor )mlt_frame_close, NULL );

				// We want to append all 'final' feeds to the global queue
				if ( !done && mlt_properties_get_data( temp_properties, "data_queue", NULL ) != NULL )
				{
					// Move the contents of this queue on to the output frames data queue
					mlt_deque sub_queue = mlt_properties_get_data( MLT_FRAME_PROPERTIES( temp ), "data_queue", NULL );
					mlt_deque temp = mlt_deque_init( );
					while ( global_feed && mlt_deque_count( sub_queue ) )
					{
						mlt_properties p = mlt_deque_pop_back( sub_queue );
						if ( mlt_properties_get_int( p, "final" ) )
							mlt_deque_push_back( data_queue, p );
						else
							mlt_deque_push_back( temp, p );
					}
					while( mlt_deque_count( temp ) )
						mlt_deque_push_front( sub_queue, mlt_deque_pop_back( temp ) );
					mlt_deque_close( temp );
				}

				// Now do the same with the global queue but without the conditional behaviour
				if ( mlt_properties_get_data( temp_properties, "global_queue", NULL ) != NULL )
				{
					mlt_deque sub_queue = mlt_properties_get_data( MLT_FRAME_PROPERTIES( temp ), "global_queue", NULL );
					while ( mlt_deque_count( sub_queue ) )
					{
						mlt_properties p = mlt_deque_pop_back( sub_queue );
						mlt_deque_push_back( data_queue, p );
					}
				}

				// Pick up first video and audio frames
				if ( !done && !mlt_frame_is_test_audio( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 2 ) )
				{
					// Order of frame creation is starting to get problematic
					if ( audio != NULL )
					{
						mlt_deque_push_front( MLT_FRAME_AUDIO_STACK( temp ), producer_get_audio );
						mlt_deque_push_front( MLT_FRAME_AUDIO_STACK( temp ), audio );
					}
					audio = temp;
				}
				if ( !done && !mlt_frame_is_test_card( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 1 ) )
				{
					if ( video != NULL )
					{
						mlt_deque_push_front( MLT_FRAME_IMAGE_STACK( temp ), producer_get_image );
						mlt_deque_push_front( MLT_FRAME_IMAGE_STACK( temp ), video );
					}
					video = temp;
					if ( first_video == NULL )
						first_video = temp;

					mlt_properties_set_int( MLT_FRAME_PROPERTIES( temp ), "image_count", ++ image_count );
					image_count = 1;
				}
			}

			// Now stack callbacks
			if ( audio != NULL )
			{
				mlt_frame_push_audio( *frame, audio );
				mlt_frame_push_audio( *frame, producer_get_audio );
			}

			if ( video != NULL )
			{
				mlt_properties video_properties = MLT_FRAME_PROPERTIES( first_video );
				mlt_frame_push_service( *frame, video );
				mlt_frame_push_service( *frame, producer_get_image );
				if ( global_feed )
					mlt_properties_set_data( frame_properties, "data_queue", data_queue, 0, NULL, NULL );
				mlt_properties_set_data( video_properties, "global_queue", data_queue, 0, destroy_data_queue, NULL );
				mlt_properties_set_int( frame_properties, "width", mlt_properties_get_int( video_properties, "width" ) );
				mlt_properties_set_int( frame_properties, "height", mlt_properties_get_int( video_properties, "height" ) );
				mlt_properties_pass_list( frame_properties, video_properties, "meta.media.width, meta.media.height" );
				mlt_properties_set_int( frame_properties, "progressive", mlt_properties_get_int( video_properties, "progressive" ) );
				mlt_properties_set_double( frame_properties, "aspect_ratio", mlt_properties_get_double( video_properties, "aspect_ratio" ) );
				mlt_properties_set_int( frame_properties, "image_count", image_count );
				mlt_properties_set_data( frame_properties, "_producer", mlt_frame_get_original_producer( first_video ), 0, NULL, NULL );
			}
			else
			{
				destroy_data_queue( data_queue );
			}

			mlt_frame_set_position( *frame, mlt_producer_frame( parent ) );
			mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_audio", audio == NULL );
			mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_image", video == NULL );
		}
		else if ( producer != NULL )
		{
			mlt_producer_seek( producer, mlt_producer_frame( parent ) );
			mlt_producer_set_speed( producer, mlt_producer_get_speed( parent ) );
			mlt_service_get_frame( self->producer, frame, track );
		}
		else
		{
			mlt_log( MLT_PRODUCER_SERVICE( parent ), MLT_LOG_ERROR, "tractor without a multitrack!!\n" );
			mlt_service_get_frame( self->producer, frame, track );
		}

		// Prepare the next frame
		mlt_producer_prepare_next( parent );

		// Indicate our found status
		return 0;
	}
	else
	{
		// Generate a test card
		*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( parent ) );
		return 0;
	}
}
示例#5
0
static int get_frame( mlt_producer self, mlt_frame_ptr frame, int index )
{
	mlt_properties properties = MLT_PRODUCER_PROPERTIES(self);
	context cx = mlt_properties_get_data( properties, "context", NULL );

	if ( !cx )
	{
		// Allocate and initialize our context
		cx = mlt_pool_alloc( sizeof( struct context_s ) );
		memset( cx, 0, sizeof( *cx ) );
		mlt_properties_set_data( properties, "context", cx, 0, mlt_pool_release, NULL );
		cx->self = self;
		char *profile_name = mlt_properties_get( properties, "profile" );
		if ( !profile_name )
			profile_name = mlt_properties_get( properties, "mlt_profile" );
		mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( self ) );

		if ( profile_name )
		{
			cx->profile = mlt_profile_init( profile_name );
			cx->profile->is_explicit = 1;
		}
		else
		{
			cx->profile = mlt_profile_clone( profile );
			cx->profile->is_explicit = 0;
		}

		// Encapsulate a real producer for the resource
		cx->producer = mlt_factory_producer( cx->profile, NULL,
			mlt_properties_get( properties, "resource" ) );
		if ( ( profile_name && !strcmp( profile_name, "auto" ) ) ||
			mlt_properties_get_int( properties, "autoprofile" ) )
		{
			mlt_profile_from_producer( cx->profile, cx->producer );
			mlt_producer_close( cx->producer );
			cx->producer = mlt_factory_producer( cx->profile, NULL,	mlt_properties_get( properties, "resource" ) );
		}

		// Since we control the seeking, prevent it from seeking on its own
		mlt_producer_set_speed( cx->producer, 0 );
		cx->audio_position = -1;

		// We will encapsulate a consumer
		cx->consumer = mlt_consumer_new( cx->profile );
		// Do not use _pass_list on real_time so that it defaults to 0 in the absence of
		// an explicit real_time property.
		mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( cx->consumer ), "real_time",
			mlt_properties_get_int( properties, "real_time" ) );
		mlt_properties_pass_list( MLT_CONSUMER_PROPERTIES( cx->consumer ), properties,
			"buffer, prefill, deinterlace_method, rescale" );
	
		// Connect it all together
		mlt_consumer_connect( cx->consumer, MLT_PRODUCER_SERVICE( cx->producer ) );
		mlt_consumer_start( cx->consumer );
	}

	// Generate a frame
	*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( self ) );
	if ( *frame )
	{
		// Seek the producer to the correct place
		// Calculate our positions
		double actual_position = (double) mlt_producer_frame( self );
		if ( mlt_producer_get_speed( self ) != 0 )
			actual_position *= mlt_producer_get_speed( self );
		mlt_position need_first = floor( actual_position );
		mlt_producer_seek( cx->producer,
			lrint( need_first * mlt_profile_fps( cx->profile ) / mlt_producer_get_fps( self ) ) );

		// Get the nested frame
		mlt_frame nested_frame = mlt_consumer_rt_frame( cx->consumer );

		// Stack the producer and our methods on the nested frame
		mlt_frame_push_service( *frame, nested_frame );
		mlt_frame_push_service( *frame, cx );
		mlt_frame_push_get_image( *frame, get_image );
		mlt_frame_push_audio( *frame, nested_frame );
		mlt_frame_push_audio( *frame, cx );
		mlt_frame_push_audio( *frame, get_audio );
		
		// Give the returned frame temporal identity
		mlt_frame_set_position( *frame, mlt_producer_position( self ) );
		
		// Store the nested frame on the produced frame for destruction
		mlt_properties frame_props = MLT_FRAME_PROPERTIES( *frame );
		mlt_properties_set_data( frame_props, "_producer_consumer.frame", nested_frame, 0, (mlt_destructor) mlt_frame_close, NULL );

		// Inform the normalizers about our video properties
		mlt_properties_set_double( frame_props, "aspect_ratio", mlt_profile_sar( cx->profile ) );
		mlt_properties_set_int( frame_props, "width", cx->profile->width );
		mlt_properties_set_int( frame_props, "height", cx->profile->height );
		mlt_properties_set_int( frame_props, "meta.media.width", cx->profile->width );
		mlt_properties_set_int( frame_props, "meta.media.height", cx->profile->height );
		mlt_properties_set_int( frame_props, "progressive", cx->profile->progressive );
	}

	// Calculate the next timecode
	mlt_producer_prepare_next( self );

	return 0;
}