+++ /dev/null
-/**
- * \file mlt_producer.c
- * \brief abstraction for all producer services
- * \see mlt_producer_s
- *
- * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
- * \author Charles Yates <charles.yates@pandora.be>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include "mlt_producer.h"
-#include "mlt_factory.h"
-#include "mlt_frame.h"
-#include "mlt_parser.h"
-#include "mlt_profile.h"
-#include "mlt_log.h"
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <math.h>
-
-/* Forward references. */
-
-static int producer_get_frame( mlt_service this, mlt_frame_ptr frame, int index );
-static void mlt_producer_property_changed( mlt_service owner, mlt_producer this, char *name );
-static void mlt_producer_service_changed( mlt_service owner, mlt_producer this );
-
-/* for debugging */
-//#define _MLT_PRODUCER_CHECKS_ 1
-#ifdef _MLT_PRODUCER_CHECKS_
-static int producers_created = 0;
-static int producers_destroyed = 0;
-#endif
-
-/** Initialize a producer service.
- *
- * \public \memberof mlt_producer_s
- * \param this the producer structure to initialize
- * \param child a pointer to the child object for the subclass
- * \return true if there was an error
- */
-
-int mlt_producer_init( mlt_producer this, void *child )
-{
- // Check that we haven't received NULL
- int error = this == NULL;
-
- // Continue if no error
- if ( error == 0 )
- {
-#ifdef _MLT_PRODUCER_CHECKS_
- producers_created ++;
-#endif
-
- // Initialise the producer
- memset( this, 0, sizeof( struct mlt_producer_s ) );
-
- // Associate with the child
- this->child = child;
-
- // Initialise the service
- if ( mlt_service_init( &this->parent, this ) == 0 )
- {
- // The parent is the service
- mlt_service parent = &this->parent;
-
- // Define the parent close
- parent->close = ( mlt_destructor )mlt_producer_close;
- parent->close_object = this;
-
- // For convenience, we'll assume the close_object is this
- this->close_object = this;
-
- // Get the properties of the parent
- mlt_properties properties = MLT_SERVICE_PROPERTIES( parent );
-
- // Set the default properties
- mlt_properties_set( properties, "mlt_type", "mlt_producer" );
- mlt_properties_set_position( properties, "_position", 0.0 );
- mlt_properties_set_double( properties, "_frame", 0 );
- mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( NULL ) );
- mlt_properties_set_double( properties, "_speed", 1.0 );
- mlt_properties_set_position( properties, "in", 0 );
- mlt_properties_set_position( properties, "out", 14999 );
- mlt_properties_set_position( properties, "length", 15000 );
- mlt_properties_set( properties, "eof", "pause" );
- mlt_properties_set( properties, "resource", "<producer>" );
-
- // Override service get_frame
- parent->get_frame = producer_get_frame;
-
- mlt_events_listen( properties, this, "service-changed", ( mlt_listener )mlt_producer_service_changed );
- mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_producer_property_changed );
- mlt_events_register( properties, "producer-changed", NULL );
- }
- }
-
- return error;
-}
-
-/** Listener for property changes.
- *
- * If the in, out, or length properties changed, fire a "producer-changed" event.
- *
- * \private \memberof mlt_producer_s
- * \param owner a service (ignored)
- * \param this the producer
- * \param name the property that changed
- */
-
-static void mlt_producer_property_changed( mlt_service owner, mlt_producer this, char *name )
-{
- if ( !strcmp( name, "in" ) || !strcmp( name, "out" ) || !strcmp( name, "length" ) )
- mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
-}
-
-/** Listener for service changes.
- *
- * Fires the "producer-changed" event.
- *
- * \private \memberof mlt_producer_s
- * \param owner a service (ignored)
- * \param this the producer
- */
-
-static void mlt_producer_service_changed( mlt_service owner, mlt_producer this )
-{
- mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
-}
-
-/** Create and initialize a new producer.
- *
- * \public \memberof mlt_producer_s
- * \return the new producer
- */
-
-mlt_producer mlt_producer_new( )
-{
- mlt_producer this = malloc( sizeof( struct mlt_producer_s ) );
- mlt_producer_init( this, NULL );
- return this;
-}
-
-/** Determine if producer is a cut.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return true if \p this is a "cut" producer
- * \see mlt_producer_cut
- */
-
-int mlt_producer_is_cut( mlt_producer this )
-{
- return mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( this ), "_cut" );
-}
-
-/** Determine if producer is a mix.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return true if this is a "mix" producer
- * \todo Define a mix producer.
- */
-
-int mlt_producer_is_mix( mlt_producer this )
-{
- mlt_properties properties = this != NULL ? MLT_PRODUCER_PROPERTIES( this ) : NULL;
- mlt_tractor tractor = properties != NULL ? mlt_properties_get_data( properties, "mlt_mix", NULL ) : NULL;
- return tractor != NULL;
-}
-
-/** Determine if the producer is a blank.
- *
- * Blank producers should only appear as an item in a playlist.
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return true if this is a "blank" producer
- * \see mlt_playlist_insert_blank
- */
-
-int mlt_producer_is_blank( mlt_producer this )
-{
- return this == NULL || !strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "resource" ), "blank" );
-}
-
-/** Obtain the parent producer.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return either the parent producer if this is a "cut" producer or \p this otherwise.
- */
-
-mlt_producer mlt_producer_cut_parent( mlt_producer this )
-{
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
- if ( mlt_producer_is_cut( this ) )
- return mlt_properties_get_data( properties, "_cut_parent", NULL );
- else
- return this;
-}
-
-/** Create a cut of this producer.
- *
- * A "cut" is a portion of another (parent) producer.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \param in the beginning
- * \param out the end
- * \return the new producer
- * \todo Expand on the value of a cut.
- */
-
-mlt_producer mlt_producer_cut( mlt_producer this, int in, int out )
-{
- mlt_producer result = mlt_producer_new( );
- mlt_producer parent = mlt_producer_cut_parent( this );
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( result );
- mlt_properties parent_props = MLT_PRODUCER_PROPERTIES( parent );
-
- mlt_events_block( MLT_PRODUCER_PROPERTIES( result ), MLT_PRODUCER_PROPERTIES( result ) );
- // Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
- if ( in <= 0 )
- in = 0;
- if ( ( out < 0 || out >= mlt_producer_get_length( parent ) ) && !mlt_producer_is_blank( this ) )
- out = mlt_producer_get_length( parent ) - 1;
-
- mlt_properties_inc_ref( parent_props );
- mlt_properties_set_int( properties, "_cut", 1 );
- mlt_properties_set_data( properties, "_cut_parent", parent, 0, ( mlt_destructor )mlt_producer_close, NULL );
- mlt_properties_set_position( properties, "length", mlt_properties_get_position( parent_props, "length" ) );
- mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( parent_props, "aspect_ratio" ) );
- mlt_producer_set_in_and_out( result, in, out );
-
- return result;
-}
-
-/** Get the parent service object.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the service parent class
- * \see MLT_PRODUCER_SERVICE
- */
-
-mlt_service mlt_producer_service( mlt_producer this )
-{
- return this != NULL ? &this->parent : NULL;
-}
-
-/** Get the producer properties.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the producer's property list
- * \see MLT_PRODUCER_PROPERTIES
- */
-
-mlt_properties mlt_producer_properties( mlt_producer this )
-{
- return MLT_SERVICE_PROPERTIES( &this->parent );
-}
-
-/** Seek to a specified position.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \param position set the "play head" position of the producer
- * \return false
- * \todo Document how the properties affect behavior.
- */
-
-int mlt_producer_seek( mlt_producer this, mlt_position position )
-{
- // Determine eof handling
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
- char *eof = mlt_properties_get( properties, "eof" );
- int use_points = 1 - mlt_properties_get_int( properties, "ignore_points" );
-
- // Recursive behaviour for cuts - repositions parent and then repositions cut
- // hence no return on this condition
- if ( mlt_producer_is_cut( this ) )
- mlt_producer_seek( mlt_producer_cut_parent( this ), position + mlt_producer_get_in( this ) );
-
- // Check bounds
- if ( position < 0 || mlt_producer_get_playtime( this ) == 0 )
- {
- position = 0;
- }
- else if ( use_points && ( eof == NULL || !strcmp( eof, "pause" ) ) && position >= mlt_producer_get_playtime( this ) )
- {
- mlt_producer_set_speed( this, 0 );
- position = mlt_producer_get_playtime( this ) - 1;
- }
- else if ( use_points && !strcmp( eof, "loop" ) && position >= mlt_producer_get_playtime( this ) )
- {
- position = (int)position % (int)mlt_producer_get_playtime( this );
- }
-
- // Set the position
- mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position );
-
- // Calculate the absolute frame
- mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points * mlt_producer_get_in( this ) + position );
-
- return 0;
-}
-
-/** Get the current position (relative to in point).
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the position of the "play head" relative to its beginning
- */
-
-mlt_position mlt_producer_position( mlt_producer this )
-{
- return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
-}
-
-/** Get the current position (relative to start of producer).
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the position of the "play head" regardless of the in point
- */
-
-mlt_position mlt_producer_frame( mlt_producer this )
-{
- return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
-}
-
-/** Set the playing speed.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \param speed the new speed as a relative factor (1.0 = normal)
- * \return
- */
-
-int mlt_producer_set_speed( mlt_producer this, double speed )
-{
- return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed );
-}
-
-/** Get the playing speed.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the speed as a relative factor (1.0 = normal)
- */
-
-double mlt_producer_get_speed( mlt_producer this )
-{
- return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
-}
-
-/** Get the frames per second.
- *
- * This is determined by the producer's profile.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the video refresh rate
- */
-
-double mlt_producer_get_fps( mlt_producer this )
-{
- mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( this ) );
- return mlt_profile_fps( profile );
-}
-
-/** Set the in and out points.
- *
- * The in point is where play out should start relative to the natural start
- * of the underlying file. The out point is where play out should end, also
- * relative to the start of the underlying file. If the underlying resource is
- * a live stream, then the in point is an offset relative to first usable
- * sample.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \param in the relative starting time
- * \param out the relative ending time
- * \return false
- */
-
-int mlt_producer_set_in_and_out( mlt_producer this, mlt_position in, mlt_position out )
-{
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
-
- // Correct ins and outs if necessary
- if ( in < 0 )
- in = 0;
- else if ( in >= mlt_producer_get_length( this ) )
- in = mlt_producer_get_length( this ) - 1;
-
- if ( out < 0 )
- out = 0;
- else if ( out >= mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
- out = mlt_producer_get_length( this ) - 1;
- else if ( out >= mlt_producer_get_length( this ) && mlt_producer_is_blank( this ) )
- mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "length", out + 1 );
-
- // Swap ins and outs if wrong
- if ( out < in )
- {
- mlt_position t = in;
- in = out;
- out = t;
- }
-
- // Set the values
- mlt_events_block( properties, properties );
- mlt_properties_set_position( properties, "in", in );
- mlt_events_unblock( properties, properties );
- mlt_properties_set_position( properties, "out", out );
-
- return 0;
-}
-
-/** Physically reduce the producer (typically a cut) to a 0 length.
- * Essentially, all 0 length cuts should be immediately removed by containers.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return false
- */
-
-int mlt_producer_clear( mlt_producer this )
-{
- if ( this != NULL )
- {
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
- mlt_events_block( properties, properties );
- mlt_properties_set_position( properties, "in", 0 );
- mlt_events_unblock( properties, properties );
- mlt_properties_set_position( properties, "out", -1 );
- }
- return 0;
-}
-
-/** Get the in point.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the in point
- */
-
-mlt_position mlt_producer_get_in( mlt_producer this )
-{
- return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "in" );
-}
-
-/** Get the out point.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the out point
- */
-
-mlt_position mlt_producer_get_out( mlt_producer this )
-{
- return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "out" );
-}
-
-/** Get the total play time.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the playable (based on in and out points) duration
- */
-
-mlt_position mlt_producer_get_playtime( mlt_producer this )
-{
- return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
-}
-
-/** Get the total, unedited length of the producer.
- *
- * The value returned by a live streaming producer is unknown.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return the duration of the producer regardless of in and out points
- */
-
-mlt_position mlt_producer_get_length( mlt_producer this )
-{
- return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "length" );
-}
-
-/** Prepare for next frame.
- *
- * Advance the play out position. If the speed is less than zero, it will
- * move the play out position in the reverse direction.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- */
-
-void mlt_producer_prepare_next( mlt_producer this )
-{
- if ( mlt_producer_get_speed( this ) != 0 )
- mlt_producer_seek( this, mlt_producer_position( this ) + mlt_producer_get_speed( this ) );
-}
-
-/** Get a frame.
- *
- * This is the implementation of the \p get_frame virtual function.
- * It requests a new frame object from the actual producer for the current
- * play out position. The producer and its filters can add information and
- * operations to the frame object in their get_frame handlers.
- *
- * \private \memberof mlt_producer_s
- * \param service a service
- * \param[out] frame a frame by reference
- * \param index as determined by the actual producer
- * \return true if there was an error
- * \todo Learn more about the details and document how certain properties affect
- * its behavior.
- */
-
-static int producer_get_frame( mlt_service service, mlt_frame_ptr frame, int index )
-{
- int result = 1;
- mlt_producer this = service != NULL ? service->child : NULL;
-
- if ( this != NULL && !mlt_producer_is_cut( this ) )
- {
- // Get the properties of this producer
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
-
- // Determine eof handling
- char *eof = mlt_properties_get( MLT_PRODUCER_PROPERTIES( this ), "eof" );
-
- // Get the speed of the producer
- double speed = mlt_producer_get_speed( this );
-
- // We need to use the clone if it's specified
- mlt_producer clone = mlt_properties_get_data( properties, "use_clone", NULL );
-
- // If no clone is specified, use this
- clone = clone == NULL ? this : clone;
-
- // A properly instatiated producer will have a get_frame method...
- 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( service );
-
- // 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 ) mlt_log( service, MLT_LOG_ERROR, "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( service );
- 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.
- *
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \param filter the filter to attach
- * \return true if there was an error
- */
-
-int mlt_producer_attach( mlt_producer this, mlt_filter filter )
-{
- return mlt_service_attach( MLT_PRODUCER_SERVICE( this ), filter );
-}
-
-/** Detach a filter.
- *
- * \public \memberof mlt_producer_s
- * \param this a service
- * \param filter the filter to detach
- * \return true if there was an error
- */
-
-int mlt_producer_detach( mlt_producer this, mlt_filter filter )
-{
- return mlt_service_detach( MLT_PRODUCER_SERVICE( this ), filter );
-}
-
-/** Retrieve a filter.
- *
- * \public \memberof mlt_producer_s
- * \param this a service
- * \param index which filter to retrieve
- * \return the filter or null if there was an error
- */
-
-mlt_filter mlt_producer_filter( mlt_producer this, int index )
-{
- return mlt_service_filter( MLT_PRODUCER_SERVICE( this ), index );
-}
-
-/** Clone this producer.
- *
- * \private \memberof mlt_producer_s
- * \param this a producer
- * \return a new producer that is a copy of \p this
- * \see mlt_producer_set_clones
- */
-
-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_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( this ) );
-
- mlt_events_block( mlt_factory_event_object( ), mlt_factory_event_object( ) );
-
- if ( service != NULL )
- clone = mlt_factory_producer( profile, service, resource );
-
- if ( clone == NULL && resource != NULL )
- clone = mlt_factory_producer( profile, mlt_environment( "MLT_PRODUCER" ), 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.
- *
- * \private \memberof mlt_producer_s
- * \param this a producer
- * \param clones the number of copies to make
- * \see mlt_producer_optimise
- */
-
-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 );
-}
-
-/** \brief private to mlt_producer_s, used by mlt_producer_optimise() */
-
-typedef struct
-{
- int multitrack;
- int track;
- int position;
- int length;
- int offset;
-}
-track_info;
-
-/** \brief private to mlt_producer_s, used by mlt_producer_optimise() */
-
-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;
-}
-
-/** Optimise for overlapping cuts from the same clip.
- *
- * \todo learn more about this
- * \public \memberof mlt_producer_s
- * \param this a producer
- * \return true if there was an error
- */
-
-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.
- *
- * Destroys the producer and deallocates its resources managed by its
- * properties list. This will call the close virtual function. Therefore, a
- * subclass that defines its own close function should set its virtual close
- * function to NULL prior to calling this to avoid circular calls.
- *
- * \public \memberof mlt_producer_s
- * \param this a 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_
- // Show current stats - these should match when the app is closed
- mlt_log( MLT_PRODUCER_SERVICE( this ), MLT_LOG_DEBUG, "Producers created %d, destroyed %d\n", producers_created, ++producers_destroyed );
-#endif
-
- mlt_service_close( &this->parent );
-
- if ( destroy )
- free( this );
- }
- }
-}
projects / melted / blobdiff