-/*
- * mlt_producer.c -- abstraction for all producer services
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
+/**
+ * \file mlt_producer.c
+ * \brief abstraction for all producer services
+ * \see mlt_producer_s
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
+ * \author Charles Yates <charles.yates@pandora.be>
*
- * This program is distributed in the hope that it will be useful,
+ * 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 General Public License for more details.
+ * 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 General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * 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 "config.h"
#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.
-*/
+/* Forward references. */
+
+static int producer_get_frame( mlt_service self, mlt_frame_ptr frame, int index );
+static void mlt_producer_property_changed( mlt_service owner, mlt_producer self, char *name );
+static void mlt_producer_service_changed( mlt_service owner, mlt_producer self );
-static int producer_get_frame( mlt_service this, mlt_frame_ptr frame, int index );
+/* for debugging */
+//#define _MLT_PRODUCER_CHECKS_ 1
+#ifdef _MLT_PRODUCER_CHECKS_
+static int producers_created = 0;
+static int producers_destroyed = 0;
+#endif
-/** Constructor
-*/
+/** Initialize a producer service.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self 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 )
+int mlt_producer_init( mlt_producer self, void *child )
{
// Check that we haven't received NULL
- int error = this == NULL;
+ int error = self == 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 ) );
-
+ memset( self, 0, sizeof( struct mlt_producer_s ) );
+
// Associate with the child
- this->child = child;
+ self->child = child;
// Initialise the service
- if ( mlt_service_init( &this->parent, this ) == 0 )
+ if ( mlt_service_init( &self->parent, self ) == 0 )
{
- // Get the normalisation preference
- char *normalisation = mlt_environment( "MLT_NORMALISATION" );
-
// The parent is the service
- mlt_service parent = &this->parent;
-
+ mlt_service parent = &self->parent;
+
+ // Define the parent close
+ parent->close = ( mlt_destructor )mlt_producer_close;
+ parent->close_object = self;
+
+ // For convenience, we'll assume the close_object is self
+ self->close_object = self;
+
// Get the properties of the parent
- mlt_properties properties = mlt_service_properties( 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 );
- if ( normalisation == NULL || strcmp( normalisation, "NTSC" ) )
- {
- mlt_properties_set_double( properties, "fps", 25.0 );
- mlt_properties_set_double( properties, "aspect_ratio", 72.0 / 79.0 );
- }
- else
- {
- mlt_properties_set_double( properties, "fps", 30000.0 / 1001.0 );
- mlt_properties_set_double( properties, "aspect_ratio", 128.0 / 117.0 );
- }
mlt_properties_set_double( properties, "_speed", 1.0 );
mlt_properties_set_position( properties, "in", 0 );
mlt_properties_set_position( properties, "out", 14999 );
// Override service get_frame
parent->get_frame = producer_get_frame;
+
+ mlt_events_listen( properties, self, "service-changed", ( mlt_listener )mlt_producer_service_changed );
+ mlt_events_listen( properties, self, "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 self the producer
+ * \param name the property that changed
+ */
+
+static void mlt_producer_property_changed( mlt_service owner, mlt_producer self, char *name )
+{
+ if ( !strcmp( name, "in" ) || !strcmp( name, "out" ) || !strcmp( name, "length" ) )
+ mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( self ) ), "producer-changed", NULL );
+}
+
+/** Listener for service changes.
+ *
+ * Fires the "producer-changed" event.
+ *
+ * \private \memberof mlt_producer_s
+ * \param owner a service (ignored)
+ * \param self the producer
+ */
+
+static void mlt_producer_service_changed( mlt_service owner, mlt_producer self )
+{
+ mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( self ) ), "producer-changed", NULL );
+}
+
+/** Create and initialize a new producer.
+ *
+ * \public \memberof mlt_producer_s
+ * \return the new producer
+ */
+
+mlt_producer mlt_producer_new( mlt_profile profile )
+{
+ mlt_producer self = malloc( sizeof( struct mlt_producer_s ) );
+ if ( self )
+ {
+ if ( mlt_producer_init( self, NULL ) == 0 )
+ {
+ mlt_properties_set_data( MLT_PRODUCER_PROPERTIES( self ), "_profile", profile, 0, NULL, NULL );
+ mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( self ), "aspect_ratio", mlt_profile_sar( profile ) );
+ }
+ else
+ {
+ free( self );
+ return NULL;
+ }
+ }
+ return self;
+}
+
+/** Determine if producer is a cut.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return true if \p self is a "cut" producer
+ * \see mlt_producer_cut
+ */
+
+int mlt_producer_is_cut( mlt_producer self )
+{
+ return mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( self ), "_cut" );
+}
+
+/** Determine if producer is a mix.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return true if \p self is a "mix" producer
+ * \todo Define a mix producer.
+ */
+
+int mlt_producer_is_mix( mlt_producer self )
+{
+ mlt_properties properties = self != NULL ? MLT_PRODUCER_PROPERTIES( self ) : 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 self a producer
+ * \return true if \p self is a "blank" producer
+ * \see mlt_playlist_insert_blank
+ */
+
+int mlt_producer_is_blank( mlt_producer self )
+{
+ return self == NULL || !strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( self ) ), "resource" ), "blank" );
+}
+
+/** Obtain the parent producer.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return either the parent producer if \p self is a "cut" producer or \p self otherwise.
+ */
+
+mlt_producer mlt_producer_cut_parent( mlt_producer self )
+{
+ mlt_properties properties = MLT_PRODUCER_PROPERTIES( self );
+ if ( mlt_producer_is_cut( self ) )
+ return mlt_properties_get_data( properties, "_cut_parent", NULL );
+ else
+ return self;
+}
+
+/** Create a cut of this producer.
+ *
+ * A "cut" is a portion of another (parent) producer.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self 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 self, int in, int out )
+{
+ mlt_producer result = mlt_producer_new( mlt_service_profile( MLT_PRODUCER_SERVICE( self ) ) );
+ mlt_producer parent = mlt_producer_cut_parent( self );
+ 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( self ) )
+ 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 self a producer
+ * \return the service parent class
+ * \see MLT_PRODUCER_SERVICE
+ */
-mlt_service mlt_producer_service( mlt_producer this )
+mlt_service mlt_producer_service( mlt_producer self )
{
- return &this->parent;
+ return self != NULL ? &self->parent : NULL;
}
/** Get the producer properties.
-*/
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return the producer's property list
+ * \see MLT_PRODUCER_PROPERTIES
+ */
-mlt_properties mlt_producer_properties( mlt_producer this )
+mlt_properties mlt_producer_properties( mlt_producer self )
{
- return mlt_service_properties( &this->parent );
+ return MLT_SERVICE_PROPERTIES( &self->parent );
}
/** Seek to a specified position.
-*/
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \param position set the "play head" position of the producer
+ * \return false
+ * \todo Document how the properties affect behavior.
+ * \see mlt_producer_seek_time
+ */
-int mlt_producer_seek( mlt_producer this, mlt_position position )
+int mlt_producer_seek( mlt_producer self, mlt_position position )
{
// Determine eof handling
- char *eof = mlt_properties_get( mlt_producer_properties( this ), "eof" );
+ mlt_properties properties = MLT_PRODUCER_PROPERTIES( self );
+ 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( self ) )
+ mlt_producer_seek( mlt_producer_cut_parent( self ), position + mlt_producer_get_in( self ) );
// Check bounds
- if ( position < 0 )
+ if ( position < 0 || mlt_producer_get_playtime( self ) == 0 )
{
position = 0;
}
- else if ( !strcmp( eof, "pause" ) && position >= mlt_producer_get_playtime( this ) )
+ else if ( use_points && ( eof == NULL || !strcmp( eof, "pause" ) ) && position >= mlt_producer_get_playtime( self ) )
{
- mlt_producer_set_speed( this, 0 );
- position = mlt_producer_get_playtime( this ) - 1;
+ mlt_producer_set_speed( self, 0 );
+ position = mlt_producer_get_playtime( self ) - 1;
}
- else if ( !strcmp( eof, "loop" ) && position >= mlt_producer_get_playtime( this ) )
+ else if ( use_points && eof && !strcmp( eof, "loop" ) && position >= mlt_producer_get_playtime( self ) )
{
- position = position % mlt_producer_get_playtime( this );
+ position = (int)position % (int)mlt_producer_get_playtime( self );
}
// Set the position
- mlt_properties_set_position( mlt_producer_properties( this ), "_position", position );
+ mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( self ), "_position", position );
// Calculate the absolute frame
- mlt_properties_set_position( mlt_producer_properties( this ), "_frame", mlt_producer_get_in( this ) + position );
+ mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( self ), "_frame", use_points * mlt_producer_get_in( self ) + position );
return 0;
}
+/** Seek to a specified time string.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \param time set the "play head" position of the producer to the time string
+ * \return false
+ * \see mlt_producer_seek
+ */
+
+int mlt_producer_seek_time( mlt_producer self, const char* time )
+{
+ mlt_properties_set( MLT_PRODUCER_PROPERTIES(self), "_seek_time", time );
+ mlt_position position = mlt_properties_get_position( MLT_PRODUCER_PROPERTIES(self), "_seek_time" );
+ return mlt_producer_seek( self, position );
+}
+
/** Get the current position (relative to in point).
-*/
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return the position of the "play head" relative to its beginning
+ */
-mlt_position mlt_producer_position( mlt_producer this )
+mlt_position mlt_producer_position( mlt_producer self )
{
- return mlt_properties_get_position( mlt_producer_properties( this ), "_position" );
+ return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( self ), "_position" );
}
/** Get the current position (relative to start of producer).
-*/
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return the position of the "play head" regardless of the in point
+ */
-mlt_position mlt_producer_frame( mlt_producer this )
+mlt_position mlt_producer_frame( mlt_producer self )
{
- return mlt_properties_get_position( mlt_producer_properties( this ), "_frame" );
+ return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( self ), "_frame" );
+}
+
+/** Get the current position (relative to start of producer) as a time string.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \param format the time value format
+ * \return the position of the "play head" regardless of the in point
+ */
+
+char* mlt_producer_frame_time( mlt_producer self, mlt_time_format format )
+{
+ return mlt_properties_get_time( MLT_PRODUCER_PROPERTIES( self ), "_frame", format );
}
/** Set the playing speed.
-*/
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \param speed the new speed as a relative factor (1.0 = normal)
+ * \return true if error
+ */
-int mlt_producer_set_speed( mlt_producer this, double speed )
+int mlt_producer_set_speed( mlt_producer self, double speed )
{
- return mlt_properties_set_double( mlt_producer_properties( this ), "_speed", speed );
+ return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( self ), "_speed", speed );
}
/** Get the playing speed.
-*/
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return the speed as a relative factor (1.0 = normal)
+ */
-double mlt_producer_get_speed( mlt_producer this )
+double mlt_producer_get_speed( mlt_producer self )
{
- return mlt_properties_get_double( mlt_producer_properties( this ), "_speed" );
+ return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( self ), "_speed" );
}
/** Get the frames per second.
-*/
+ *
+ * This is determined by the producer's profile.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return the video refresh rate
+ */
-double mlt_producer_get_fps( mlt_producer this )
+double mlt_producer_get_fps( mlt_producer self )
{
- return mlt_properties_get_double( mlt_producer_properties( this ), "fps" );
+ mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( self ) );
+ 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 self a producer
+ * \param in the relative starting time; a negative value is the same as 0
+ * \param out the relative ending time; a negative value is the same as length - 1
+ * \return false
+ */
-int mlt_producer_set_in_and_out( mlt_producer this, mlt_position in, mlt_position out )
+int mlt_producer_set_in_and_out( mlt_producer self, mlt_position in, mlt_position out )
{
+ mlt_properties properties = MLT_PRODUCER_PROPERTIES( self );
+
// 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 );
+ else if ( in >= mlt_producer_get_length( self ) )
+ in = mlt_producer_get_length( self ) - 1;
- if ( out < 0 )
+ if ( ( out < 0 || out >= mlt_producer_get_length( self ) ) && !mlt_producer_is_blank( self ) )
+ out = mlt_producer_get_length( self ) - 1;
+ else if ( ( out < 0 || out >= mlt_producer_get_length( self ) ) && mlt_producer_is_blank( self ) )
+ mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( self ), "length", out + 1 );
+ else if ( out < 0 )
out = 0;
- else if ( out > mlt_producer_get_length( this ) )
- out = mlt_producer_get_length( this );
// Swap ins and outs if wrong
if ( out < in )
}
// Set the values
- mlt_properties_set_position( mlt_producer_properties( this ), "in", in );
- mlt_properties_set_position( mlt_producer_properties( this ), "out", out );
+ 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 self a producer
+ * \return false
+ */
+int mlt_producer_clear( mlt_producer self )
+{
+ if ( self != NULL )
+ {
+ mlt_properties properties = MLT_PRODUCER_PROPERTIES( self );
+ 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 self a producer
+ * \return the in point
+ */
-mlt_position mlt_producer_get_in( mlt_producer this )
+mlt_position mlt_producer_get_in( mlt_producer self )
{
- return mlt_properties_get_position( mlt_producer_properties( this ), "in" );
+ return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( self ), "in" );
}
/** Get the out point.
-*/
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return the out point
+ */
-mlt_position mlt_producer_get_out( mlt_producer this )
+mlt_position mlt_producer_get_out( mlt_producer self )
{
- return mlt_properties_get_position( mlt_producer_properties( this ), "out" );
+ return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( self ), "out" );
}
/** Get the total play time.
-*/
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return the playable (based on in and out points) duration
+ */
-mlt_position mlt_producer_get_playtime( mlt_producer this )
+mlt_position mlt_producer_get_playtime( mlt_producer self )
{
- return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
+ return mlt_producer_get_out( self ) - mlt_producer_get_in( self ) + 1;
}
-/** Get the total length of the producer.
-*/
+/** Get the total, unedited length of the producer.
+ *
+ * The value returned by a live streaming producer is unknown.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \return the duration of the producer regardless of in and out points
+ */
-mlt_position mlt_producer_get_length( mlt_producer this )
+mlt_position mlt_producer_get_length( mlt_producer self )
{
- return mlt_properties_get_position( mlt_producer_properties( this ), "length" );
+ return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( self ), "length" );
+}
+
+/** Get the total, unedited length of the producer as a time string.
+ *
+ * The value returned by a live streaming producer is unknown.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \param format the time value format
+ * \return the duration of the producer regardless of in and out points
+ */
+
+char* mlt_producer_get_length_time( mlt_producer self, mlt_time_format format )
+{
+ return mlt_properties_get_time( MLT_PRODUCER_PROPERTIES( self ), "length", format );
}
/** 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 self a producer
+ */
-void mlt_producer_prepare_next( mlt_producer this )
+void mlt_producer_prepare_next( mlt_producer self )
{
- mlt_producer_seek( this, mlt_producer_position( this ) + mlt_producer_get_speed( this ) );
+ if ( mlt_producer_get_speed( self ) != 0 )
+ mlt_producer_seek( self, mlt_producer_position( self ) + mlt_producer_get_speed( self ) );
}
/** 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->child;
+ mlt_producer self = service != NULL ? service->child : NULL;
- // Determine eof handling
- char *eof = mlt_properties_get( mlt_producer_properties( this ), "eof" );
+ if ( self != NULL && !mlt_producer_is_cut( self ) )
+ {
+ // Get the properties of this producer
+ mlt_properties properties = MLT_PRODUCER_PROPERTIES( self );
+
+ // Determine eof handling
+ char *eof = mlt_properties_get( MLT_PRODUCER_PROPERTIES( self ), "eof" );
+
+ // Get the speed of the producer
+ double speed = mlt_producer_get_speed( self );
+
+ // We need to use the clone if it's specified
+ mlt_producer clone = mlt_properties_get_data( properties, "use_clone", NULL );
- // 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 ) ) )
+ // If no clone is specified, use self
+ clone = clone == NULL ? self : clone;
+
+ // A properly instatiated producer will have a get_frame method...
+ if ( self->get_frame == NULL || ( eof && !strcmp( eof, "continue" ) && mlt_producer_position( self ) > mlt_producer_get_out( self ) ) )
+ {
+ // Generate a test frame
+ *frame = mlt_frame_init( service );
+
+ // Set the position
+ result = mlt_frame_set_position( *frame, mlt_producer_position( self ) );
+
+ // 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( self );
+ }
+ else
+ {
+ // Get the frame from the implementation
+ result = self->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 ( self != NULL )
{
- // Generate a test frame
- *frame = mlt_frame_init( );
+ // Get the speed of the cut
+ double speed = mlt_producer_get_speed( self );
+
+ // Get the parent of the cut
+ mlt_producer parent = mlt_producer_cut_parent( self );
+
+ // 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( self );
+
+ // Determine the clone index
+ int clone_index = mlt_properties_get_int( properties, "_clone" );
+
+ // Determine the clone to use
+ mlt_producer clone = self;
+
+ 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( self ) ), key, NULL );
+ if ( clone == NULL ) mlt_log( service, MLT_LOG_ERROR, "requested clone doesn't exist %d\n", clone_index );
+ clone = clone == NULL ? self : clone;
+ }
+ else
+ {
+ clone = parent;
+ }
+
+ // We need to seek to the correct position in the clone
+ mlt_producer_seek( clone, mlt_producer_get_in( self ) + 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 );
- // Set the position
- result = mlt_frame_set_position( *frame, mlt_producer_position( this ) );
+ // Now get the frame from the parents service
+ result = mlt_service_get_frame( MLT_PRODUCER_SERVICE( parent ), frame, index );
- // 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 );
+ // We're done with the clone now
+ mlt_properties_set_data( parent_properties, "use_clone", NULL, 0, NULL, NULL );
- // Calculate the next position
- mlt_producer_prepare_next( this );
+ // 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", self, 0, NULL, NULL );
+
+ mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame ), "_speed", speed );
+ mlt_producer_prepare_next( self );
}
else
{
- // Get the frame from the implementation
- result = this->get_frame( this, frame, index );
+ *frame = mlt_frame_init( service );
+ result = 0;
+ }
+
+ // Pass on all meta properties from the producer/cut on to the frame
+ if ( *frame != NULL && self != NULL )
+ {
+ int i = 0;
+ mlt_properties p_props = MLT_PRODUCER_PROPERTIES( self );
+ mlt_properties f_props = MLT_FRAME_PROPERTIES( *frame );
+ mlt_properties_lock( p_props );
+ 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_value( p_props, i ) );
+ else if ( !strncmp( name, "set.", 4 ) )
+ mlt_properties_set( f_props, name + 4, mlt_properties_get_value( p_props, i ) );
+ }
+ mlt_properties_unlock( p_props );
}
- // Copy the fps and speed of the producer onto the frame
- mlt_properties properties = mlt_frame_properties( *frame );
- mlt_properties_set_double( properties, "fps", mlt_producer_get_fps( this ) );
- double speed = mlt_producer_get_speed( this );
- mlt_properties_set_double( properties, "_speed", speed );
+ return result;
+}
+
+/** Attach a filter.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a producer
+ * \param filter the filter to attach
+ * \return true if there was an error
+ */
+
+int mlt_producer_attach( mlt_producer self, mlt_filter filter )
+{
+ return mlt_service_attach( MLT_PRODUCER_SERVICE( self ), filter );
+}
+
+/** Detach a filter.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self a service
+ * \param filter the filter to detach
+ * \return true if there was an error
+ */
+
+int mlt_producer_detach( mlt_producer self, mlt_filter filter )
+{
+ return mlt_service_detach( MLT_PRODUCER_SERVICE( self ), filter );
+}
+
+/** Retrieve a filter.
+ *
+ * \public \memberof mlt_producer_s
+ * \param self 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 self, int index )
+{
+ return mlt_service_filter( MLT_PRODUCER_SERVICE( self ), index );
+}
+
+/** Clone a producer.
+ *
+ * \private \memberof mlt_producer_s
+ * \param self a producer
+ * \return a new producer that is a copy of \p self
+ * \see mlt_producer_set_clones
+ */
+
+static mlt_producer mlt_producer_clone( mlt_producer self )
+{
+ mlt_producer clone = NULL;
+ mlt_properties properties = MLT_PRODUCER_PROPERTIES( self );
+ char *resource = mlt_properties_get( properties, "resource" );
+ char *service = mlt_properties_get( properties, "mlt_service" );
+ mlt_profile profile = mlt_service_profile( MLT_PRODUCER_SERVICE( self ) );
+
+ 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, NULL, 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 self a producer
+ * \param clones the number of copies to make
+ * \see mlt_producer_optimise
+ */
+
+static void mlt_producer_set_clones( mlt_producer self, int clones )
+{
+ mlt_producer parent = mlt_producer_cut_parent( self );
+ 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 self, int multitrack, int track, int position )
+{
+ mlt_properties properties = mlt_parser_properties( self );
+ 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 self )
+{
+ mlt_properties properties = mlt_parser_properties( self );
+ mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
+ return mlt_deque_pop_back( stack );
+}
+
+static track_info *peek( mlt_parser self )
+{
+ mlt_properties properties = mlt_parser_properties( self );
+ mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
+ return mlt_deque_peek_back( stack );
+}
+
+static int on_start_multitrack( mlt_parser self, mlt_multitrack object )
+{
+ track_info *info = peek( self );
+ return push( self, info->multitrack ++, info->track, info->position );
+}
+
+static int on_start_track( mlt_parser self )
+{
+ track_info *info = peek( self );
+ info->position -= info->offset;
+ info->length -= info->offset;
+ return push( self, info->multitrack, info->track ++, info->position );
+}
+
+static int on_start_producer( mlt_parser self, mlt_producer object )
+{
+ mlt_properties properties = mlt_parser_properties( self );
+ 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( self );
+ 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 self )
+{
+ track_info *track = pop( self );
+ track_info *multi = peek( self );
+ multi->length += track->length;
+ multi->position += track->length;
+ multi->offset = track->length;
+ free( track );
+ return 0;
+}
+
+static int on_end_multitrack( mlt_parser self, mlt_multitrack object )
+{
+ track_info *multi = pop( self );
+ track_info *track = peek( self );
+ 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 self a producer
+ * \return true if there was an error
+ */
+
+int mlt_producer_optimise( mlt_producer self )
+{
+ 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( self ) );
+ 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_at( producers, k, &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 self a producer
+ */
-void mlt_producer_close( mlt_producer this )
+void mlt_producer_close( mlt_producer self )
{
- if ( this->close != NULL )
- this->close( this );
- else
- mlt_service_close( &this->parent );
+ if ( self != NULL && mlt_properties_dec_ref( MLT_PRODUCER_PROPERTIES( self ) ) <= 0 )
+ {
+ self->parent.close = NULL;
+
+ if ( self->close != NULL )
+ {
+ self->close( self->close_object );
+ }
+ else
+ {
+ int destroy = mlt_producer_is_cut( self );
+
+#if _MLT_PRODUCER_CHECKS_ == 1
+ // Show debug info
+ mlt_properties_debug( MLT_PRODUCER_PROPERTIES( self ), "Producer closing", stderr );
+#endif
+
+#ifdef _MLT_PRODUCER_CHECKS_
+ // Show current stats - these should match when the app is closed
+ mlt_log( MLT_PRODUCER_SERVICE( self ), MLT_LOG_DEBUG, "Producers created %d, destroyed %d\n", producers_created, ++producers_destroyed );
+#endif
+
+ mlt_service_close( &self->parent );
+
+ if ( destroy )
+ free( self );
+ }
+ }
}
projects / mlt / blobdiff