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847 lines
25 KiB
847 lines
25 KiB
15 years ago
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/*
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* mlt_producer.c -- abstraction for all producer services
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* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
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* Author: Charles Yates <charles.yates@pandora.be>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "mlt_producer.h"
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#include "mlt_factory.h"
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#include "mlt_frame.h"
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#include "mlt_parser.h"
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#include "mlt_profile.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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/** Forward references.
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*/
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static int producer_get_frame( mlt_service this, mlt_frame_ptr frame, int index );
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static void mlt_producer_property_changed( mlt_service owner, mlt_producer this, char *name );
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static void mlt_producer_service_changed( mlt_service owner, mlt_producer this );
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//#define _MLT_PRODUCER_CHECKS_ 1
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#ifdef _MLT_PRODUCER_CHECKS_
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static int producers_created = 0;
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static int producers_destroyed = 0;
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#endif
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/** Constructor
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*/
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int mlt_producer_init( mlt_producer this, void *child )
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{
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// Check that we haven't received NULL
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int error = this == NULL;
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// Continue if no error
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if ( error == 0 )
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{
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#ifdef _MLT_PRODUCER_CHECKS_
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producers_created ++;
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#endif
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// Initialise the producer
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memset( this, 0, sizeof( struct mlt_producer_s ) );
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// Associate with the child
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this->child = child;
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// Initialise the service
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if ( mlt_service_init( &this->parent, this ) == 0 )
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{
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// The parent is the service
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mlt_service parent = &this->parent;
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// Define the parent close
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parent->close = ( mlt_destructor )mlt_producer_close;
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parent->close_object = this;
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// For convenience, we'll assume the close_object is this
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this->close_object = this;
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// Get the properties of the parent
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mlt_properties properties = MLT_SERVICE_PROPERTIES( parent );
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// Set the default properties
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mlt_properties_set( properties, "mlt_type", "mlt_producer" );
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mlt_properties_set_position( properties, "_position", 0.0 );
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mlt_properties_set_double( properties, "_frame", 0 );
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mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( NULL ) );
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mlt_properties_set_double( properties, "_speed", 1.0 );
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mlt_properties_set_position( properties, "in", 0 );
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mlt_properties_set_position( properties, "out", 14999 );
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mlt_properties_set_position( properties, "length", 15000 );
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mlt_properties_set( properties, "eof", "pause" );
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mlt_properties_set( properties, "resource", "<producer>" );
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// Override service get_frame
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parent->get_frame = producer_get_frame;
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mlt_events_listen( properties, this, "service-changed", ( mlt_listener )mlt_producer_service_changed );
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mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_producer_property_changed );
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mlt_events_register( properties, "producer-changed", NULL );
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}
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}
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return error;
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}
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/** Listener for property changes.
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*/
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static void mlt_producer_property_changed( mlt_service owner, mlt_producer this, char *name )
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{
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if ( !strcmp( name, "in" ) || !strcmp( name, "out" ) || !strcmp( name, "length" ) )
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mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
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}
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/** Listener for service changes.
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*/
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static void mlt_producer_service_changed( mlt_service owner, mlt_producer this )
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{
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mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
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}
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/** Create a new producer.
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*/
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mlt_producer mlt_producer_new( )
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{
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mlt_producer this = malloc( sizeof( struct mlt_producer_s ) );
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mlt_producer_init( this, NULL );
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return this;
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}
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/** Determine if producer is a cut.
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*/
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int mlt_producer_is_cut( mlt_producer this )
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{
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return mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( this ), "_cut" );
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}
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/** Determine if producer is a mix.
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*/
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int mlt_producer_is_mix( mlt_producer this )
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{
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mlt_properties properties = this != NULL ? MLT_PRODUCER_PROPERTIES( this ) : NULL;
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mlt_tractor tractor = properties != NULL ? mlt_properties_get_data( properties, "mlt_mix", NULL ) : NULL;
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return tractor != NULL;
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}
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/** Determine if the producer is a blank [from a playlist].
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*/
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int mlt_producer_is_blank( mlt_producer this )
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{
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return this == NULL || !strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "resource" ), "blank" );
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}
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/** Obtain the parent producer.
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*/
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mlt_producer mlt_producer_cut_parent( mlt_producer this )
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{
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
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if ( mlt_producer_is_cut( this ) )
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return mlt_properties_get_data( properties, "_cut_parent", NULL );
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else
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return this;
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}
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/** Create a cut of this producer
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*/
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mlt_producer mlt_producer_cut( mlt_producer this, int in, int out )
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{
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mlt_producer result = mlt_producer_new( );
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mlt_producer parent = mlt_producer_cut_parent( this );
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( result );
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mlt_properties parent_props = MLT_PRODUCER_PROPERTIES( parent );
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mlt_events_block( MLT_PRODUCER_PROPERTIES( result ), MLT_PRODUCER_PROPERTIES( result ) );
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// Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
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if ( in <= 0 )
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in = 0;
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if ( ( out < 0 || out >= mlt_producer_get_length( parent ) ) && !mlt_producer_is_blank( this ) )
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out = mlt_producer_get_length( parent ) - 1;
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mlt_properties_inc_ref( parent_props );
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mlt_properties_set_int( properties, "_cut", 1 );
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mlt_properties_set_data( properties, "_cut_parent", parent, 0, ( mlt_destructor )mlt_producer_close, NULL );
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mlt_properties_set_position( properties, "length", mlt_properties_get_position( parent_props, "length" ) );
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mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( parent_props, "aspect_ratio" ) );
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mlt_producer_set_in_and_out( result, in, out );
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return result;
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}
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/** Get the parent service object.
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*/
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mlt_service mlt_producer_service( mlt_producer this )
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{
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return this != NULL ? &this->parent : NULL;
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}
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/** Get the producer properties.
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*/
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mlt_properties mlt_producer_properties( mlt_producer this )
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{
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return MLT_SERVICE_PROPERTIES( &this->parent );
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}
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/** Seek to a specified position.
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*/
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int mlt_producer_seek( mlt_producer this, mlt_position position )
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{
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// Determine eof handling
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
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char *eof = mlt_properties_get( properties, "eof" );
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int use_points = 1 - mlt_properties_get_int( properties, "ignore_points" );
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// Recursive behaviour for cuts - repositions parent and then repositions cut
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// hence no return on this condition
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if ( mlt_producer_is_cut( this ) )
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mlt_producer_seek( mlt_producer_cut_parent( this ), position + mlt_producer_get_in( this ) );
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// Check bounds
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if ( position < 0 || mlt_producer_get_playtime( this ) == 0 )
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{
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position = 0;
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}
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else if ( use_points && ( eof == NULL || !strcmp( eof, "pause" ) ) && position >= mlt_producer_get_playtime( this ) )
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{
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mlt_producer_set_speed( this, 0 );
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position = mlt_producer_get_playtime( this ) - 1;
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}
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else if ( use_points && !strcmp( eof, "loop" ) && position >= mlt_producer_get_playtime( this ) )
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{
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position = (int)position % (int)mlt_producer_get_playtime( this );
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}
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// Set the position
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mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position );
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// Calculate the absolute frame
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mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points * mlt_producer_get_in( this ) + position );
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return 0;
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}
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/** Get the current position (relative to in point).
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*/
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mlt_position mlt_producer_position( mlt_producer this )
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{
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return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
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}
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/** Get the current position (relative to start of producer).
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*/
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mlt_position mlt_producer_frame( mlt_producer this )
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{
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return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
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}
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/** Set the playing speed.
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*/
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int mlt_producer_set_speed( mlt_producer this, double speed )
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{
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return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed );
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}
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/** Get the playing speed.
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*/
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double mlt_producer_get_speed( mlt_producer this )
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{
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return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
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}
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/** Get the frames per second.
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*/
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double mlt_producer_get_fps( mlt_producer this )
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{
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return mlt_profile_fps( NULL );
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}
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/** Set the in and out points.
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*/
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int mlt_producer_set_in_and_out( mlt_producer this, mlt_position in, mlt_position out )
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{
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
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// Correct ins and outs if necessary
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if ( in < 0 )
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in = 0;
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else if ( in >= mlt_producer_get_length( this ) )
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in = mlt_producer_get_length( this ) - 1;
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if ( out < 0 )
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out = 0;
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else if ( out >= mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
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out = mlt_producer_get_length( this ) - 1;
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else if ( out >= mlt_producer_get_length( this ) && mlt_producer_is_blank( this ) )
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mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "length", out + 1 );
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// Swap ins and outs if wrong
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if ( out < in )
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{
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mlt_position t = in;
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in = out;
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out = t;
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}
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// Set the values
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mlt_events_block( properties, properties );
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mlt_properties_set_position( properties, "in", in );
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mlt_events_unblock( properties, properties );
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mlt_properties_set_position( properties, "out", out );
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return 0;
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}
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/** Physically reduce the producer (typically a cut) to a 0 length.
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Essentially, all 0 length cuts should be immediately removed by containers.
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*/
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int mlt_producer_clear( mlt_producer this )
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{
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if ( this != NULL )
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{
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
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mlt_events_block( properties, properties );
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mlt_properties_set_position( properties, "in", 0 );
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mlt_events_unblock( properties, properties );
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mlt_properties_set_position( properties, "out", -1 );
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}
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return 0;
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}
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/** Get the in point.
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*/
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mlt_position mlt_producer_get_in( mlt_producer this )
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{
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return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "in" );
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}
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/** Get the out point.
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*/
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mlt_position mlt_producer_get_out( mlt_producer this )
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{
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return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "out" );
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}
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/** Get the total play time.
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*/
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mlt_position mlt_producer_get_playtime( mlt_producer this )
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{
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return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
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}
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/** Get the total length of the producer.
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*/
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mlt_position mlt_producer_get_length( mlt_producer this )
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{
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return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "length" );
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}
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/** Prepare for next frame.
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*/
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void mlt_producer_prepare_next( mlt_producer this )
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{
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if ( mlt_producer_get_speed( this ) != 0 )
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mlt_producer_seek( this, mlt_producer_position( this ) + mlt_producer_get_speed( this ) );
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}
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/** Get a frame.
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*/
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static int producer_get_frame( mlt_service service, mlt_frame_ptr frame, int index )
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{
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int result = 1;
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mlt_producer this = service != NULL ? service->child : NULL;
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if ( this != NULL && !mlt_producer_is_cut( this ) )
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{
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// Get the properties of this producer
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
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// Determine eof handling
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char *eof = mlt_properties_get( MLT_PRODUCER_PROPERTIES( this ), "eof" );
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// Get the speed of the producer
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double speed = mlt_producer_get_speed( this );
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// We need to use the clone if it's specified
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mlt_producer clone = mlt_properties_get_data( properties, "use_clone", NULL );
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// If no clone is specified, use this
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clone = clone == NULL ? this : clone;
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// A properly instatiated producer will have a get_frame method...
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||
|
if ( this->get_frame == NULL || ( !strcmp( eof, "continue" ) && mlt_producer_position( this ) > mlt_producer_get_out( this ) ) )
|
||
|
{
|
||
|
// Generate a test frame
|
||
|
*frame = mlt_frame_init( );
|
||
|
|
||
|
// Set the position
|
||
|
result = mlt_frame_set_position( *frame, mlt_producer_position( this ) );
|
||
|
|
||
|
// Mark as a test card
|
||
|
mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_image", 1 );
|
||
|
mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_audio", 1 );
|
||
|
|
||
|
// Calculate the next position
|
||
|
mlt_producer_prepare_next( this );
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
// Get the frame from the implementation
|
||
|
result = this->get_frame( clone, frame, index );
|
||
|
}
|
||
|
|
||
|
// Copy the fps and speed of the producer onto the frame
|
||
|
properties = MLT_FRAME_PROPERTIES( *frame );
|
||
|
mlt_properties_set_double( properties, "_speed", speed );
|
||
|
mlt_properties_set_int( properties, "test_audio", mlt_frame_is_test_audio( *frame ) );
|
||
|
mlt_properties_set_int( properties, "test_image", mlt_frame_is_test_card( *frame ) );
|
||
|
if ( mlt_properties_get_data( properties, "_producer", NULL ) == NULL )
|
||
|
mlt_properties_set_data( properties, "_producer", service, 0, NULL, NULL );
|
||
|
}
|
||
|
else if ( this != NULL )
|
||
|
{
|
||
|
// Get the speed of the cut
|
||
|
double speed = mlt_producer_get_speed( this );
|
||
|
|
||
|
// Get the parent of this cut
|
||
|
mlt_producer parent = mlt_producer_cut_parent( this );
|
||
|
|
||
|
// Get the properties of the parent
|
||
|
mlt_properties parent_properties = MLT_PRODUCER_PROPERTIES( parent );
|
||
|
|
||
|
// Get the properties of the cut
|
||
|
mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
|
||
|
|
||
|
// Determine the clone index
|
||
|
int clone_index = mlt_properties_get_int( properties, "_clone" );
|
||
|
|
||
|
// Determine the clone to use
|
||
|
mlt_producer clone = this;
|
||
|
|
||
|
if ( clone_index > 0 )
|
||
|
{
|
||
|
char key[ 25 ];
|
||
|
sprintf( key, "_clone.%d", clone_index - 1 );
|
||
|
clone = mlt_properties_get_data( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), key, NULL );
|
||
|
if ( clone == NULL ) fprintf( stderr, "requested clone doesn't exist %d\n", clone_index );
|
||
|
clone = clone == NULL ? this : clone;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
clone = parent;
|
||
|
}
|
||
|
|
||
|
// We need to seek to the correct position in the clone
|
||
|
mlt_producer_seek( clone, mlt_producer_get_in( this ) + mlt_properties_get_int( properties, "_position" ) );
|
||
|
|
||
|
// Assign the clone property to the parent
|
||
|
mlt_properties_set_data( parent_properties, "use_clone", clone, 0, NULL, NULL );
|
||
|
|
||
|
// Now get the frame from the parents service
|
||
|
result = mlt_service_get_frame( MLT_PRODUCER_SERVICE( parent ), frame, index );
|
||
|
|
||
|
// We're done with the clone now
|
||
|
mlt_properties_set_data( parent_properties, "use_clone", NULL, 0, NULL, NULL );
|
||
|
|
||
|
// This is useful and required by always_active transitions to determine in/out points of the cut
|
||
|
if ( mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame ), "_producer", NULL ) == MLT_PRODUCER_SERVICE( parent ) )
|
||
|
mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame ), "_producer", this, 0, NULL, NULL );
|
||
|
|
||
|
mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame ), "_speed", speed );
|
||
|
mlt_producer_prepare_next( this );
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
*frame = mlt_frame_init( );
|
||
|
result = 0;
|
||
|
}
|
||
|
|
||
|
// Pass on all meta properties from the producer/cut on to the frame
|
||
|
if ( *frame != NULL && this != NULL )
|
||
|
{
|
||
|
int i = 0;
|
||
|
mlt_properties p_props = MLT_PRODUCER_PROPERTIES( this );
|
||
|
mlt_properties f_props = MLT_FRAME_PROPERTIES( *frame );
|
||
|
int count = mlt_properties_count( p_props );
|
||
|
for ( i = 0; i < count; i ++ )
|
||
|
{
|
||
|
char *name = mlt_properties_get_name( p_props, i );
|
||
|
if ( !strncmp( name, "meta.", 5 ) )
|
||
|
mlt_properties_set( f_props, name, mlt_properties_get( p_props, name ) );
|
||
|
else if ( !strncmp( name, "set.", 4 ) )
|
||
|
mlt_properties_set( f_props, name + 4, mlt_properties_get( p_props, name ) );
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
/** Attach a filter.
|
||
|
*/
|
||
|
|
||
|
int mlt_producer_attach( mlt_producer this, mlt_filter filter )
|
||
|
{
|
||
|
return mlt_service_attach( MLT_PRODUCER_SERVICE( this ), filter );
|
||
|
}
|
||
|
|
||
|
/** Detach a filter.
|
||
|
*/
|
||
|
|
||
|
int mlt_producer_detach( mlt_producer this, mlt_filter filter )
|
||
|
{
|
||
|
return mlt_service_detach( MLT_PRODUCER_SERVICE( this ), filter );
|
||
|
}
|
||
|
|
||
|
/** Retrieve a filter.
|
||
|
*/
|
||
|
|
||
|
mlt_filter mlt_producer_filter( mlt_producer this, int index )
|
||
|
{
|
||
|
return mlt_service_filter( MLT_PRODUCER_SERVICE( this ), index );
|
||
|
}
|
||
|
|
||
|
/** Clone this producer.
|
||
|
*/
|
||
|
|
||
|
static mlt_producer mlt_producer_clone( mlt_producer this )
|
||
|
{
|
||
|
mlt_producer clone = NULL;
|
||
|
mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
|
||
|
char *resource = mlt_properties_get( properties, "resource" );
|
||
|
char *service = mlt_properties_get( properties, "mlt_service" );
|
||
|
|
||
|
mlt_events_block( mlt_factory_event_object( ), mlt_factory_event_object( ) );
|
||
|
|
||
|
if ( service != NULL )
|
||
|
clone = mlt_factory_producer( service, resource );
|
||
|
|
||
|
if ( clone == NULL && resource != NULL )
|
||
|
clone = mlt_factory_producer( "fezzik", resource );
|
||
|
|
||
|
if ( clone != NULL )
|
||
|
mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( clone ), properties );
|
||
|
|
||
|
mlt_events_unblock( mlt_factory_event_object( ), mlt_factory_event_object( ) );
|
||
|
|
||
|
return clone;
|
||
|
}
|
||
|
|
||
|
/** Create clones.
|
||
|
*/
|
||
|
|
||
|
static void mlt_producer_set_clones( mlt_producer this, int clones )
|
||
|
{
|
||
|
mlt_producer parent = mlt_producer_cut_parent( this );
|
||
|
mlt_properties properties = MLT_PRODUCER_PROPERTIES( parent );
|
||
|
int existing = mlt_properties_get_int( properties, "_clones" );
|
||
|
int i = 0;
|
||
|
char key[ 25 ];
|
||
|
|
||
|
// If the number of existing clones is different, then create/remove as necessary
|
||
|
if ( existing != clones )
|
||
|
{
|
||
|
if ( existing < clones )
|
||
|
{
|
||
|
for ( i = existing; i < clones; i ++ )
|
||
|
{
|
||
|
mlt_producer clone = mlt_producer_clone( parent );
|
||
|
sprintf( key, "_clone.%d", i );
|
||
|
mlt_properties_set_data( properties, key, clone, 0, ( mlt_destructor )mlt_producer_close, NULL );
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
for ( i = clones; i < existing; i ++ )
|
||
|
{
|
||
|
sprintf( key, "_clone.%d", i );
|
||
|
mlt_properties_set_data( properties, key, NULL, 0, NULL, NULL );
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// Ensure all properties on the parent are passed to the clones
|
||
|
for ( i = 0; i < clones; i ++ )
|
||
|
{
|
||
|
mlt_producer clone = NULL;
|
||
|
sprintf( key, "_clone.%d", i );
|
||
|
clone = mlt_properties_get_data( properties, key, NULL );
|
||
|
if ( clone != NULL )
|
||
|
mlt_properties_pass( MLT_PRODUCER_PROPERTIES( clone ), properties, "" );
|
||
|
}
|
||
|
|
||
|
// Update the number of clones on the properties
|
||
|
mlt_properties_set_int( properties, "_clones", clones );
|
||
|
}
|
||
|
|
||
|
/** Optimise for overlapping cuts from the same clip.
|
||
|
*/
|
||
|
|
||
|
typedef struct
|
||
|
{
|
||
|
int multitrack;
|
||
|
int track;
|
||
|
int position;
|
||
|
int length;
|
||
|
int offset;
|
||
|
}
|
||
|
track_info;
|
||
|
|
||
|
typedef struct
|
||
|
{
|
||
|
mlt_producer cut;
|
||
|
int start;
|
||
|
int end;
|
||
|
}
|
||
|
clip_references;
|
||
|
|
||
|
static int intersect( clip_references *a, clip_references *b )
|
||
|
{
|
||
|
int diff = ( a->start - b->start ) + ( a->end - b->end );
|
||
|
return diff >= 0 && diff < ( a->end - a->start + 1 );
|
||
|
}
|
||
|
|
||
|
static int push( mlt_parser this, int multitrack, int track, int position )
|
||
|
{
|
||
|
mlt_properties properties = mlt_parser_properties( this );
|
||
|
mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
|
||
|
track_info *info = malloc( sizeof( track_info ) );
|
||
|
info->multitrack = multitrack;
|
||
|
info->track = track;
|
||
|
info->position = position;
|
||
|
info->length = 0;
|
||
|
info->offset = 0;
|
||
|
return mlt_deque_push_back( stack, info );
|
||
|
}
|
||
|
|
||
|
static track_info *pop( mlt_parser this )
|
||
|
{
|
||
|
mlt_properties properties = mlt_parser_properties( this );
|
||
|
mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
|
||
|
return mlt_deque_pop_back( stack );
|
||
|
}
|
||
|
|
||
|
static track_info *peek( mlt_parser this )
|
||
|
{
|
||
|
mlt_properties properties = mlt_parser_properties( this );
|
||
|
mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
|
||
|
return mlt_deque_peek_back( stack );
|
||
|
}
|
||
|
|
||
|
static int on_start_multitrack( mlt_parser this, mlt_multitrack object )
|
||
|
{
|
||
|
track_info *info = peek( this );
|
||
|
return push( this, info->multitrack ++, info->track, info->position );
|
||
|
}
|
||
|
|
||
|
static int on_start_track( mlt_parser this )
|
||
|
{
|
||
|
track_info *info = peek( this );
|
||
|
info->position -= info->offset;
|
||
|
info->length -= info->offset;
|
||
|
return push( this, info->multitrack, info->track ++, info->position );
|
||
|
}
|
||
|
|
||
|
static int on_start_producer( mlt_parser this, mlt_producer object )
|
||
|
{
|
||
|
mlt_properties properties = mlt_parser_properties( this );
|
||
|
mlt_properties producers = mlt_properties_get_data( properties, "producers", NULL );
|
||
|
mlt_producer parent = mlt_producer_cut_parent( object );
|
||
|
if ( mlt_service_identify( ( mlt_service )mlt_producer_cut_parent( object ) ) == producer_type && mlt_producer_is_cut( object ) )
|
||
|
{
|
||
|
int ref_count = 0;
|
||
|
clip_references *old_refs = NULL;
|
||
|
clip_references *refs = NULL;
|
||
|
char key[ 50 ];
|
||
|
int count = 0;
|
||
|
track_info *info = peek( this );
|
||
|
sprintf( key, "%p", parent );
|
||
|
mlt_properties_get_data( producers, key, &count );
|
||
|
mlt_properties_set_data( producers, key, parent, ++ count, NULL, NULL );
|
||
|
old_refs = mlt_properties_get_data( properties, key, &ref_count );
|
||
|
refs = malloc( ( ref_count + 1 ) * sizeof( clip_references ) );
|
||
|
if ( old_refs != NULL )
|
||
|
memcpy( refs, old_refs, ref_count * sizeof( clip_references ) );
|
||
|
mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( object ), "_clone", -1 );
|
||
|
refs[ ref_count ].cut = object;
|
||
|
refs[ ref_count ].start = info->position;
|
||
|
refs[ ref_count ].end = info->position + mlt_producer_get_playtime( object ) - 1;
|
||
|
mlt_properties_set_data( properties, key, refs, ++ ref_count, free, NULL );
|
||
|
info->position += mlt_producer_get_playtime( object );
|
||
|
info->length += mlt_producer_get_playtime( object );
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int on_end_track( mlt_parser this )
|
||
|
{
|
||
|
track_info *track = pop( this );
|
||
|
track_info *multi = peek( this );
|
||
|
multi->length += track->length;
|
||
|
multi->position += track->length;
|
||
|
multi->offset = track->length;
|
||
|
free( track );
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int on_end_multitrack( mlt_parser this, mlt_multitrack object )
|
||
|
{
|
||
|
track_info *multi = pop( this );
|
||
|
track_info *track = peek( this );
|
||
|
track->position += multi->length;
|
||
|
track->length += multi->length;
|
||
|
free( multi );
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int mlt_producer_optimise( mlt_producer this )
|
||
|
{
|
||
|
int error = 1;
|
||
|
mlt_parser parser = mlt_parser_new( );
|
||
|
if ( parser != NULL )
|
||
|
{
|
||
|
int i = 0, j = 0, k = 0;
|
||
|
mlt_properties properties = mlt_parser_properties( parser );
|
||
|
mlt_properties producers = mlt_properties_new( );
|
||
|
mlt_deque stack = mlt_deque_init( );
|
||
|
mlt_properties_set_data( properties, "producers", producers, 0, ( mlt_destructor )mlt_properties_close, NULL );
|
||
|
mlt_properties_set_data( properties, "stack", stack, 0, ( mlt_destructor )mlt_deque_close, NULL );
|
||
|
parser->on_start_producer = on_start_producer;
|
||
|
parser->on_start_track = on_start_track;
|
||
|
parser->on_end_track = on_end_track;
|
||
|
parser->on_start_multitrack = on_start_multitrack;
|
||
|
parser->on_end_multitrack = on_end_multitrack;
|
||
|
push( parser, 0, 0, 0 );
|
||
|
mlt_parser_start( parser, MLT_PRODUCER_SERVICE( this ) );
|
||
|
free( pop( parser ) );
|
||
|
for ( k = 0; k < mlt_properties_count( producers ); k ++ )
|
||
|
{
|
||
|
char *name = mlt_properties_get_name( producers, k );
|
||
|
int count = 0;
|
||
|
int clones = 0;
|
||
|
int max_clones = 0;
|
||
|
mlt_producer producer = mlt_properties_get_data( producers, name, &count );
|
||
|
if ( producer != NULL && count > 1 )
|
||
|
{
|
||
|
clip_references *refs = mlt_properties_get_data( properties, name, &count );
|
||
|
for ( i = 0; i < count; i ++ )
|
||
|
{
|
||
|
clones = 0;
|
||
|
for ( j = i + 1; j < count; j ++ )
|
||
|
{
|
||
|
if ( intersect( &refs[ i ], &refs[ j ] ) )
|
||
|
{
|
||
|
clones ++;
|
||
|
mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( refs[ j ].cut ), "_clone", clones );
|
||
|
}
|
||
|
}
|
||
|
if ( clones > max_clones )
|
||
|
max_clones = clones;
|
||
|
}
|
||
|
|
||
|
for ( i = 0; i < count; i ++ )
|
||
|
{
|
||
|
mlt_producer cut = refs[ i ].cut;
|
||
|
if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone" ) == -1 )
|
||
|
mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone", 0 );
|
||
|
}
|
||
|
|
||
|
mlt_producer_set_clones( producer, max_clones );
|
||
|
}
|
||
|
else if ( producer != NULL )
|
||
|
{
|
||
|
clip_references *refs = mlt_properties_get_data( properties, name, &count );
|
||
|
for ( i = 0; i < count; i ++ )
|
||
|
{
|
||
|
mlt_producer cut = refs[ i ].cut;
|
||
|
mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone", 0 );
|
||
|
}
|
||
|
mlt_producer_set_clones( producer, 0 );
|
||
|
}
|
||
|
}
|
||
|
mlt_parser_close( parser );
|
||
|
}
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
/** Close the producer.
|
||
|
*/
|
||
|
|
||
|
void mlt_producer_close( mlt_producer this )
|
||
|
{
|
||
|
if ( this != NULL && mlt_properties_dec_ref( MLT_PRODUCER_PROPERTIES( this ) ) <= 0 )
|
||
|
{
|
||
|
this->parent.close = NULL;
|
||
|
|
||
|
if ( this->close != NULL )
|
||
|
{
|
||
|
this->close( this->close_object );
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
int destroy = mlt_producer_is_cut( this );
|
||
|
|
||
|
#if _MLT_PRODUCER_CHECKS_ == 1
|
||
|
// Show debug info
|
||
|
mlt_properties_debug( MLT_PRODUCER_PROPERTIES( this ), "Producer closing", stderr );
|
||
|
#endif
|
||
|
|
||
|
#ifdef _MLT_PRODUCER_CHECKS_
|
||
|
// Increment destroyed count
|
||
|
producers_destroyed ++;
|
||
|
|
||
|
// Show current stats - these should match when the app is closed
|
||
|
fprintf( stderr, "Producers created %d, destroyed %d\n", producers_created, producers_destroyed );
|
||
|
#endif
|
||
|
|
||
|
mlt_service_close( &this->parent );
|
||
|
|
||
|
if ( destroy )
|
||
|
free( this );
|
||
|
}
|
||
|
}
|
||
|
}
|