-/*
- * mlt_service.c -- interface for all service classes
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
+/**
+ * \file mlt_service.c
+ * \brief interface definition for all service classes
+ * \see mlt_service_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_service.h"
#include "mlt_filter.h"
#include "mlt_frame.h"
+#include "mlt_cache.h"
+#include "mlt_factory.h"
+#include "mlt_log.h"
+#include "mlt_producer.h"
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
-/** IMPORTANT NOTES
+
+/* IMPORTANT NOTES
The base service implements a null frame producing service - as such,
- it is functional without extension and will produce test cards frames
+ it is functional without extension and will produce test cards frames
and PAL sized audio frames.
- PLEASE DO NOT CHANGE THIS BEHAVIOUR!!! OVERRIDE THE METHODS THAT
+ PLEASE DO NOT CHANGE THIS BEHAVIOUR!!! OVERRIDE THE METHODS THAT
CONTROL THIS IN EXTENDING CLASSES.
*/
-/** Private service definition.
-*/
+/** \brief private service definition */
typedef struct
{
}
mlt_service_base;
-/** Private methods
-*/
+/* Private methods
+ */
-static void mlt_service_disconnect( mlt_service this );
-static void mlt_service_connect( mlt_service this, mlt_service that );
-static int service_get_frame( mlt_service this, mlt_frame_ptr frame, int index );
-static void mlt_service_property_changed( mlt_listener, mlt_properties owner, mlt_service this, void **args );
+static void mlt_service_disconnect( mlt_service self );
+static void mlt_service_connect( mlt_service self, mlt_service that );
+static int service_get_frame( mlt_service self, mlt_frame_ptr frame, int index );
+static void mlt_service_property_changed( mlt_listener, mlt_properties owner, mlt_service self, void **args );
-/** Constructor
-*/
+/** Initialize a service.
+ *
+ * \public \memberof mlt_service_s
+ * \param self the service structure to initialize
+ * \param child pointer to the child object for the subclass
+ * \return true if there was an error
+ */
-int mlt_service_init( mlt_service this, void *child )
+int mlt_service_init( mlt_service self, void *child )
{
int error = 0;
// Initialise everything to NULL
- memset( this, 0, sizeof( struct mlt_service_s ) );
+ memset( self, 0, sizeof( struct mlt_service_s ) );
// Assign the child
- this->child = child;
+ self->child = child;
// Generate local space
- this->local = calloc( sizeof( mlt_service_base ), 1 );
+ self->local = calloc( 1, sizeof( mlt_service_base ) );
// Associate the methods
- this->get_frame = service_get_frame;
-
+ self->get_frame = service_get_frame;
+
// Initialise the properties
- error = mlt_properties_init( &this->parent, this );
+ error = mlt_properties_init( &self->parent, self );
if ( error == 0 )
{
- this->parent.close = ( mlt_destructor )mlt_service_close;
- this->parent.close_object = this;
+ self->parent.close = ( mlt_destructor )mlt_service_close;
+ self->parent.close_object = self;
- mlt_events_init( &this->parent );
- mlt_events_register( &this->parent, "service-changed", NULL );
- mlt_events_register( &this->parent, "property-changed", ( mlt_transmitter )mlt_service_property_changed );
- pthread_mutex_init( &( ( mlt_service_base * )this->local )->mutex, NULL );
+ mlt_events_init( &self->parent );
+ mlt_events_register( &self->parent, "service-changed", NULL );
+ mlt_events_register( &self->parent, "property-changed", ( mlt_transmitter )mlt_service_property_changed );
+ pthread_mutex_init( &( ( mlt_service_base * )self->local )->mutex, NULL );
}
return error;
}
-static void mlt_service_property_changed( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
+/** The transmitter for property changes.
+ *
+ * Invokes the listener.
+ *
+ * \private \memberof mlt_service_s
+ * \param listener a function pointer that will be invoked
+ * \param owner a properties list that will be passed to \p listener
+ * \param self a service that will be passed to \p listener
+ * \param args an array of pointers - the first entry is passed as a string to \p listener
+ */
+
+static void mlt_service_property_changed( mlt_listener listener, mlt_properties owner, mlt_service self, void **args )
{
if ( listener != NULL )
- listener( owner, this, ( char * )args[ 0 ] );
+ listener( owner, self, ( char * )args[ 0 ] );
}
-void mlt_service_lock( mlt_service this )
+/** Acquire a mutual exclusion lock on this service.
+ *
+ * \public \memberof mlt_service_s
+ * \param self the service to lock
+ */
+
+#include <execinfo.h>
+
+void mlt_service_lock( mlt_service self )
{
- if ( this != NULL )
- pthread_mutex_lock( &( ( mlt_service_base * )this->local )->mutex );
+ if ( self != NULL )
+ pthread_mutex_lock( &( ( mlt_service_base * )self->local )->mutex );
}
-void mlt_service_unlock( mlt_service this )
+/** Release a mutual exclusion lock on this service.
+ *
+ * \public \memberof mlt_service_s
+ * \param self the service to unlock
+ */
+
+void mlt_service_unlock( mlt_service self )
{
- if ( this != NULL )
- pthread_mutex_unlock( &( ( mlt_service_base * )this->local )->mutex );
+ if ( self != NULL )
+ pthread_mutex_unlock( &( ( mlt_service_base * )self->local )->mutex );
}
-mlt_service_type mlt_service_identify( mlt_service this )
+/** Identify the subclass of the service.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \return the subclass
+ */
+
+mlt_service_type mlt_service_identify( mlt_service self )
{
mlt_service_type type = invalid_type;
- if ( this != NULL )
+ if ( self != NULL )
{
- mlt_properties properties = MLT_SERVICE_PROPERTIES( this );
+ mlt_properties properties = MLT_SERVICE_PROPERTIES( self );
char *mlt_type = mlt_properties_get( properties, "mlt_type" );
char *resource = mlt_properties_get( properties, "resource" );
if ( mlt_type == NULL )
type = unknown_type;
- else if ( resource == NULL || !strcmp( resource, "<producer>" ) )
- type = producer_type;
- else if ( !strcmp( resource, "<playlist>" ) )
+ else if (resource != NULL && !strcmp( resource, "<playlist>" ) )
type = playlist_type;
- else if ( !strcmp( resource, "<tractor>" ) )
+ else if (resource != NULL && !strcmp( resource, "<tractor>" ) )
type = tractor_type;
- else if ( !strcmp( resource, "<multitrack>" ) )
+ else if (resource != NULL && !strcmp( resource, "<multitrack>" ) )
type = multitrack_type;
else if ( !strcmp( mlt_type, "producer" ) )
type = producer_type;
return type;
}
-/** Connect a producer service.
- Returns: > 0 warning, == 0 success, < 0 serious error
- 1 = this service does not accept input
- 2 = the producer is invalid
- 3 = the producer is already registered with this consumer
-*/
+/** Connect a producer to the service.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param producer a producer
+ * \param index which of potentially multiple producers to this service (0 based)
+ * \return > 0 warning, == 0 success, < 0 serious error,
+ * 1 = this service does not accept input,
+ * 2 = the producer is invalid,
+ * 3 = the producer is already registered with self consumer
+ */
-int mlt_service_connect_producer( mlt_service this, mlt_service producer, int index )
+int mlt_service_connect_producer( mlt_service self, mlt_service producer, int index )
{
int i = 0;
// Get the service base
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
// Special case 'track' index - only works for last filter(s) in a particular chain
// but allows a filter to apply to the output frame regardless of which track it comes from
// Increment the reference count on this producer
if ( producer != NULL )
- {
- mlt_service_lock( producer );
mlt_properties_inc_ref( MLT_SERVICE_PROPERTIES( producer ) );
- mlt_service_unlock( producer );
- }
// Now we disconnect the producer service from its consumer
mlt_service_disconnect( producer );
-
+
// Add the service to index specified
base->in[ index ] = producer;
-
+
// Determine the number of active tracks
if ( index >= base->count )
base->count = index + 1;
// Now we connect the producer to its connected consumer
- mlt_service_connect( producer, this );
+ mlt_service_connect( producer, self );
// Close the current service
mlt_service_close( current );
}
}
-/** Disconnect this service from its consumer.
-*/
+/** Disconnect a service from its consumer.
+ *
+ * \private \memberof mlt_service_s
+ * \param self a service
+ */
-static void mlt_service_disconnect( mlt_service this )
+static void mlt_service_disconnect( mlt_service self )
{
- if ( this != NULL )
+ if ( self != NULL )
{
// Get the service base
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
// Disconnect
base->out = NULL;
}
}
-/** Obtain the consumer this service is connected to.
-*/
+/** Obtain the consumer a service is connected to.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \return the consumer
+ */
-mlt_service mlt_service_consumer( mlt_service this )
+mlt_service mlt_service_consumer( mlt_service self )
{
// Get the service base
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
// Return the connected consumer
return base->out;
}
-/** Obtain the producer this service is connected to.
-*/
+/** Obtain the producer a service is connected to.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \return the last-most producer
+ */
-mlt_service mlt_service_producer( mlt_service this )
+mlt_service mlt_service_producer( mlt_service self )
{
// Get the service base
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
// Return the connected producer
return base->count > 0 ? base->in[ base->count - 1 ] : NULL;
}
-/** Associate this service to the consumer.
-*/
+/** Associate a service to a consumer.
+ *
+ * Overwrites connection to any existing consumer.
+ * \private \memberof mlt_service_s
+ * \param self a service
+ * \param that a consumer
+ */
-static void mlt_service_connect( mlt_service this, mlt_service that )
+static void mlt_service_connect( mlt_service self, mlt_service that )
{
- if ( this != NULL )
+ if ( self != NULL )
{
// Get the service base
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
// There's a bit more required here...
base->out = that;
}
}
-/** Get the first connected producer service.
-*/
+/** Get the first connected producer.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \return the first producer
+ */
-mlt_service mlt_service_get_producer( mlt_service this )
+mlt_service mlt_service_get_producer( mlt_service self )
{
mlt_service producer = NULL;
// Get the service base
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
if ( base->in != NULL )
producer = base->in[ 0 ];
-
+
return producer;
}
-/** Default implementation of get_frame.
-*/
+/** Default implementation of the get_frame virtual function.
+ *
+ * \private \memberof mlt_service_s
+ * \param self a service
+ * \param[out] frame a frame by reference
+ * \param index as determined by the producer
+ * \return false
+ */
-static int service_get_frame( mlt_service this, mlt_frame_ptr frame, int index )
+static int service_get_frame( mlt_service self, mlt_frame_ptr frame, int index )
{
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
if ( index < base->count )
{
mlt_service producer = base->in[ index ];
if ( producer != NULL )
return mlt_service_get_frame( producer, frame, index );
}
- *frame = mlt_frame_init( );
+ *frame = mlt_frame_init( self );
return 0;
}
/** Return the properties object.
-*/
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \return the properties
+ */
mlt_properties mlt_service_properties( mlt_service self )
{
return self != NULL ? &self->parent : NULL;
}
-/** Recursively apply attached filters
-*/
+/** Recursively apply attached filters.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param frame a frame
+ * \param index used to track depth of recursion, top caller should supply 0
+ */
-void mlt_service_apply_filters( mlt_service this, mlt_frame frame, int index )
+void mlt_service_apply_filters( mlt_service self, mlt_frame frame, int index )
{
int i;
mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
- mlt_properties service_properties = MLT_SERVICE_PROPERTIES( this );
- mlt_service_base *base = this->local;
+ mlt_properties service_properties = MLT_SERVICE_PROPERTIES( self );
+ mlt_service_base *base = self->local;
mlt_position position = mlt_frame_get_position( frame );
- mlt_position this_in = mlt_properties_get_position( service_properties, "in" );
- mlt_position this_out = mlt_properties_get_position( service_properties, "out" );
+ mlt_position self_in = mlt_properties_get_position( service_properties, "in" );
+ mlt_position self_out = mlt_properties_get_position( service_properties, "out" );
if ( index == 0 || mlt_properties_get_int( service_properties, "_filter_private" ) == 0 )
{
{
mlt_position in = mlt_filter_get_in( base->filters[ i ] );
mlt_position out = mlt_filter_get_out( base->filters[ i ] );
- if ( ( in == 0 && out == 0 ) || ( position >= in && ( position <= out || out == 0 ) ) )
+ int disable = mlt_properties_get_int( MLT_FILTER_PROPERTIES( base->filters[ i ] ), "disable" );
+ if ( !disable && ( ( in == 0 && out == 0 ) || ( position >= in && ( position <= out || out == 0 ) ) ) )
{
- mlt_properties_set_position( frame_properties, "in", in == 0 ? this_in : in );
- mlt_properties_set_position( frame_properties, "out", out == 0 ? this_out : out );
+ mlt_properties_set_position( frame_properties, "in", in == 0 ? self_in : in );
+ mlt_properties_set_position( frame_properties, "out", out == 0 ? self_out : out );
mlt_filter_process( base->filters[ i ], frame );
mlt_service_apply_filters( MLT_FILTER_SERVICE( base->filters[ i ] ), frame, index + 1 );
}
}
/** Obtain a frame.
-*/
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param[out] frame a frame by reference
+ * \param index as determined by the producer
+ * \return true if there was an error
+ */
-int mlt_service_get_frame( mlt_service this, mlt_frame_ptr frame, int index )
+int mlt_service_get_frame( mlt_service self, mlt_frame_ptr frame, int index )
{
- mlt_service_lock( this );
- if ( this != NULL && this->get_frame != NULL )
+ int result = 0;
+
+ // Lock the service
+ mlt_service_lock( self );
+
+ // Ensure that the frame is NULL
+ *frame = NULL;
+
+ // Only process if we have a valid service
+ if ( self != NULL && self->get_frame != NULL )
{
- int result = 0;
- mlt_properties properties = MLT_SERVICE_PROPERTIES( this );
+ mlt_properties properties = MLT_SERVICE_PROPERTIES( self );
mlt_position in = mlt_properties_get_position( properties, "in" );
mlt_position out = mlt_properties_get_position( properties, "out" );
- mlt_properties_inc_ref( properties );
- result = this->get_frame( this, frame, index );
+ mlt_position position = mlt_service_identify( self ) == producer_type ? mlt_producer_position( MLT_PRODUCER( self ) ) : -1;
+
+ result = self->get_frame( self, frame, index );
+
if ( result == 0 )
{
+ mlt_properties_inc_ref( properties );
properties = MLT_FRAME_PROPERTIES( *frame );
+
if ( in >=0 && out > 0 )
{
mlt_properties_set_position( properties, "in", in );
mlt_properties_set_position( properties, "out", out );
}
- mlt_service_apply_filters( this, *frame, 1 );
- mlt_deque_push_back( MLT_FRAME_SERVICE_STACK( *frame ), this );
- mlt_service_unlock( this );
- }
- else
- {
- mlt_service_unlock( this );
- mlt_service_close( this );
+ mlt_service_apply_filters( self, *frame, 1 );
+ mlt_deque_push_back( MLT_FRAME_SERVICE_STACK( *frame ), self );
+
+ if ( mlt_service_identify( self ) == producer_type &&
+ mlt_properties_get_int( MLT_SERVICE_PROPERTIES( self ), "_need_previous_next" ) )
+ {
+ // Save the new position from self->get_frame
+ mlt_position new_position = mlt_producer_position( MLT_PRODUCER( self ) );
+
+ // Get the preceding frame, unfiltered
+ mlt_frame previous_frame;
+ mlt_producer_seek( MLT_PRODUCER(self), position - 1 );
+ result = self->get_frame( self, &previous_frame, index );
+ if ( !result )
+ mlt_properties_set_data( properties, "previous frame",
+ previous_frame, 0, ( mlt_destructor ) mlt_frame_close, NULL );
+
+ // Get the following frame, unfiltered
+ mlt_frame next_frame;
+ mlt_producer_seek( MLT_PRODUCER(self), position + 1 );
+ result = self->get_frame( self, &next_frame, index );
+ if ( !result )
+ {
+ mlt_properties_set_data( properties, "next frame",
+ next_frame, 0, ( mlt_destructor ) mlt_frame_close, NULL );
+ }
+
+ // Restore the new position
+ mlt_producer_seek( MLT_PRODUCER(self), new_position );
+ }
}
- return result;
}
- mlt_service_unlock( this );
- *frame = mlt_frame_init( );
- return 0;
+
+ // Make sure we return a frame
+ if ( *frame == NULL )
+ *frame = mlt_frame_init( self );
+
+ // Unlock the service
+ mlt_service_unlock( self );
+
+ return result;
}
-static void mlt_service_filter_changed( mlt_service owner, mlt_service this )
+/** The service-changed event handler.
+ *
+ * \private \memberof mlt_service_s
+ * \param owner ignored
+ * \param self the service on which the "service-changed" event is fired
+ */
+
+static void mlt_service_filter_changed( mlt_service owner, mlt_service self )
{
- mlt_events_fire( MLT_SERVICE_PROPERTIES( this ), "service-changed", NULL );
+ mlt_events_fire( MLT_SERVICE_PROPERTIES( self ), "service-changed", NULL );
+}
+
+/** The property-changed event handler.
+ *
+ * \private \memberof mlt_service_s
+ * \param owner ignored
+ * \param self the service on which the "property-changed" event is fired
+ * \param name the name of the property that changed
+ */
+
+static void mlt_service_filter_property_changed( mlt_service owner, mlt_service self, char *name )
+{
+ mlt_events_fire( MLT_SERVICE_PROPERTIES( self ), "property-changed", name, NULL );
}
/** Attach a filter.
-*/
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param filter the filter to attach
+ * \return true if there was an error
+ */
-int mlt_service_attach( mlt_service this, mlt_filter filter )
+int mlt_service_attach( mlt_service self, mlt_filter filter )
{
- int error = this == NULL || filter == NULL;
+#if 0
+ void *buffer[1024];
+ int num, i;
+ char **sym;
+ printf("ATTACHING %p -> %p\n", self, filter);
+ for (i = 0; i < 1024; ++i) buffer[i] = 0;
+ num = backtrace(buffer, 1024);
+ sym = backtrace_symbols(buffer, num);
+ for (i = 0; i < num; ++i) {
+ //printf("%3d: %s\n", sym[i]);
+ }
+ free(sym);
+#endif
+ int error = self == NULL || filter == NULL;
if ( error == 0 )
{
int i = 0;
- mlt_properties properties = MLT_SERVICE_PROPERTIES( this );
- mlt_service_base *base = this->local;
+ mlt_properties properties = MLT_SERVICE_PROPERTIES( self );
+ mlt_service_base *base = self->local;
for ( i = 0; error == 0 && i < base->filter_count; i ++ )
if ( base->filters[ i ] == filter )
mlt_properties props = MLT_FILTER_PROPERTIES( filter );
mlt_properties_inc_ref( MLT_FILTER_PROPERTIES( filter ) );
base->filters[ base->filter_count ++ ] = filter;
+ mlt_properties_set_data( props, "service", self, 0, NULL, NULL );
mlt_events_fire( properties, "service-changed", NULL );
- mlt_events_listen( props, this, "service-changed", ( mlt_listener )mlt_service_filter_changed );
- mlt_events_listen( props, this, "property-changed", ( mlt_listener )mlt_service_filter_changed );
+ mlt_events_fire( props, "service-changed", NULL );
+ mlt_service cp = mlt_properties_get_data( properties, "_cut_parent", NULL );
+ if ( cp )
+ mlt_events_fire( MLT_SERVICE_PROPERTIES(cp), "service-changed", NULL );
+ mlt_events_listen( props, self, "service-changed", ( mlt_listener )mlt_service_filter_changed );
+ mlt_events_listen( props, self, "property-changed", ( mlt_listener )mlt_service_filter_property_changed );
}
else
{
}
/** Detach a filter.
-*/
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param filter the filter to detach
+ * \return true if there was an error
+ */
-int mlt_service_detach( mlt_service this, mlt_filter filter )
+int mlt_service_detach( mlt_service self, mlt_filter filter )
{
- int error = this == NULL || filter == NULL;
+ int error = self == NULL || filter == NULL;
if ( error == 0 )
{
int i = 0;
- mlt_service_base *base = this->local;
- mlt_properties properties = MLT_SERVICE_PROPERTIES( this );
+ mlt_service_base *base = self->local;
+ mlt_properties properties = MLT_SERVICE_PROPERTIES( self );
for ( i = 0; i < base->filter_count; i ++ )
if ( base->filters[ i ] == filter )
for ( i ++ ; i < base->filter_count; i ++ )
base->filters[ i - 1 ] = base->filters[ i ];
base->filter_count --;
- mlt_events_disconnect( MLT_FILTER_PROPERTIES( filter ), this );
+ mlt_events_disconnect( MLT_FILTER_PROPERTIES( filter ), self );
mlt_filter_close( filter );
mlt_events_fire( properties, "service-changed", NULL );
}
return error;
}
-/** Retrieve a filter.
-*/
+/** Get the number of filters attached.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \return the number of attached filters or -1 if there was an error
+ */
+
+int mlt_service_filter_count( mlt_service self )
+{
+ int result = -1;
+ if ( self )
+ {
+ mlt_service_base *base = self->local;
+ result = base->filter_count;
+ }
+ return result;
+}
+
+/** Reorder the attached filters.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param from the current index value of the filter to move
+ * \param to the new index value for the filter specified in \p from
+ * \return true if there was an error
+ */
-mlt_filter mlt_service_filter( mlt_service this, int index )
+int mlt_service_move_filter( mlt_service self, int from, int to )
+{
+ int error = -1;
+ if ( self )
+ {
+ mlt_service_base *base = self->local;
+ if ( from < 0 ) from = 0;
+ if ( from >= base->filter_count ) from = base->filter_count - 1;
+ if ( to < 0 ) to = 0;
+ if ( to >= base->filter_count ) to = base->filter_count - 1;
+ if ( from != to && base->filter_count > 1 )
+ {
+ mlt_filter filter = base->filters[from];
+ int i;
+ if ( from > to )
+ {
+ for ( i = from; i > to; i-- )
+ base->filters[i] = base->filters[i - 1];
+ }
+ else
+ {
+ for ( i = from; i < to; i++ )
+ base->filters[i] = base->filters[i + 1];
+ }
+ base->filters[to] = filter;
+ mlt_events_fire( MLT_SERVICE_PROPERTIES(self), "service-changed", NULL );
+ error = 0;
+ }
+ }
+ return error;
+}
+
+/** Retrieve an attached filter.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param index which one of potentially multiple filters
+ * \return the filter or null if there was an error
+ */
+
+mlt_filter mlt_service_filter( mlt_service self, int index )
{
mlt_filter filter = NULL;
- if ( this != NULL )
+ if ( self != NULL )
{
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
if ( index >= 0 && index < base->filter_count )
filter = base->filters[ index ];
}
return filter;
}
-/** Close the service.
-*/
+/** Retrieve the profile.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \return the profile
+ */
+
+mlt_profile mlt_service_profile( mlt_service self )
+{
+ return self? mlt_properties_get_data( MLT_SERVICE_PROPERTIES( self ), "_profile", NULL ) : NULL;
+}
+
+/** Set the profile for a service.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param profile the profile to set onto the service
+ */
-void mlt_service_close( mlt_service this )
+void mlt_service_set_profile( mlt_service self, mlt_profile profile )
{
- mlt_service_lock( this );
- if ( this != NULL && mlt_properties_dec_ref( MLT_SERVICE_PROPERTIES( this ) ) <= 0 )
+ mlt_properties_set_data( MLT_SERVICE_PROPERTIES( self ), "_profile", profile, 0, NULL, NULL );
+}
+
+/** Destroy a service.
+ *
+ * \public \memberof mlt_service_s
+ * \param self the service to destroy
+ */
+
+void mlt_service_close( mlt_service self )
+{
+ if ( self != NULL && mlt_properties_dec_ref( MLT_SERVICE_PROPERTIES( self ) ) <= 0 )
{
- mlt_service_unlock( this );
- if ( this->close != NULL )
+ if ( self->close != NULL )
{
- this->close( this->close_object );
+ self->close( self->close_object );
}
else
{
- mlt_service_base *base = this->local;
+ mlt_service_base *base = self->local;
int i = 0;
int count = base->filter_count;
- mlt_events_block( MLT_SERVICE_PROPERTIES( this ), this );
+ mlt_events_block( MLT_SERVICE_PROPERTIES( self ), self );
while( count -- )
- mlt_service_detach( this, base->filters[ 0 ] );
+ mlt_service_detach( self, base->filters[ 0 ] );
free( base->filters );
for ( i = 0; i < base->count; i ++ )
if ( base->in[ i ] != NULL )
mlt_service_close( base->in[ i ] );
- this->parent.close = NULL;
+ self->parent.close = NULL;
free( base->in );
pthread_mutex_destroy( &base->mutex );
free( base );
- mlt_properties_close( &this->parent );
+ mlt_properties_close( &self->parent );
}
}
- else
+}
+
+/** Release a service's cache items.
+ *
+ * \private \memberof mlt_service_s
+ * \param self a service
+ */
+
+void mlt_service_cache_purge( mlt_service self )
+{
+ mlt_properties caches = mlt_properties_get_data( mlt_global_properties(), "caches", NULL );
+
+ if ( caches )
+ {
+ int i = mlt_properties_count( caches );
+ while ( i-- )
+ {
+ mlt_cache_purge( mlt_properties_get_data_at( caches, i, NULL ), self );
+ mlt_properties_set_data( mlt_global_properties(), mlt_properties_get_name( caches, i ), NULL, 0, NULL, NULL );
+ }
+ }
+}
+
+/** Lookup the cache object for a service.
+ *
+ * \private \memberof mlt_service_s
+ * \param self a service
+ * \param name a name for the object
+ * \return a cache
+ */
+
+static mlt_cache get_cache( mlt_service self, const char *name )
+{
+ mlt_cache result = NULL;
+ mlt_properties caches = mlt_properties_get_data( mlt_global_properties(), "caches", NULL );
+
+ if ( !caches )
+ {
+ caches = mlt_properties_new();
+ mlt_properties_set_data( mlt_global_properties(), "caches", caches, 0, ( mlt_destructor )mlt_properties_close, NULL );
+ }
+ if ( caches )
{
- mlt_service_unlock( this );
+ result = mlt_properties_get_data( caches, name, NULL );
+ if ( !result )
+ {
+ result = mlt_cache_init();
+ mlt_properties_set_data( caches, name, result, 0, ( mlt_destructor )mlt_cache_close, NULL );
+ }
}
+
+ return result;
}
+/** Put an object into a service's cache.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param name a name for the object that is unique to the service class, but not to the instance
+ * \param data an opaque pointer to the object to put into the cache
+ * \param size the number of bytes pointed to by data
+ * \param destructor a function that releases the data
+ */
+
+void mlt_service_cache_put( mlt_service self, const char *name, void* data, int size, mlt_destructor destructor )
+{
+ mlt_log( self, MLT_LOG_DEBUG, "%s: name %s object %p data %p\n", __FUNCTION__, name, self, data );
+ mlt_cache cache = get_cache( self, name );
+
+ if ( cache )
+ mlt_cache_put( cache, self, data, size, destructor );
+}
+
+/** Get an object from a service's cache.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param name a name for the object that is unique to the service class, but not to the instance
+ * \return a cache item or NULL if an object is not found
+ * \see mlt_cache_item_data
+ */
+
+mlt_cache_item mlt_service_cache_get( mlt_service self, const char *name )
+{
+ mlt_log( self, MLT_LOG_DEBUG, "%s: name %s object %p\n", __FUNCTION__, name, self );
+ mlt_cache_item result = NULL;
+ mlt_cache cache = get_cache( self, name );
+
+ if ( cache )
+ result = mlt_cache_get( cache, self );
+
+ return result;
+}
+
+/** Set the number of items to cache for the named cache.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param name a name for the object that is unique to the service class, but not to the instance
+ * \param size the number of items to cache
+ */
+
+void mlt_service_cache_set_size( mlt_service self, const char *name, int size )
+{
+ mlt_cache cache = get_cache( self, name );
+ if ( cache )
+ mlt_cache_set_size( cache, size );
+}
+
+/** Get the current maximum size of the named cache.
+ *
+ * \public \memberof mlt_service_s
+ * \param self a service
+ * \param name a name for the object that is unique to the service class, but not to the instance
+ * \return the current maximum number of items to cache or zero if there is an error
+ */
+
+int mlt_service_cache_get_size( mlt_service self, const char *name )
+{
+ mlt_cache cache = get_cache( self, name );
+ if ( cache )
+ return mlt_cache_get_size( cache );
+ else
+ return 0;
+}
projects / mlt / blobdiff