-/*
- * mlt_consumer.c -- abstraction for all consumer services
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
+/**
+ * \file mlt_consumer.c
+ * \brief abstraction for all consumer services
+ * \see mlt_consumer_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) 2003-2010 Ushodaya Enterprises Limited
+ * \author Charles Yates <charles.yates@pandora.be>
+ * \author Dan Dennedy <dan@dennedy.org>
*
- * 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_consumer.h"
+#include "mlt_factory.h"
+#include "mlt_producer.h"
+#include "mlt_frame.h"
+#include "mlt_profile.h"
+#include "mlt_log.h"
+
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
+#include <sys/time.h>
+
+/** Define this if you want an automatic deinterlace (if necessary) when the
+ * consumer's producer is not running at normal speed.
+ */
+#undef DEINTERLACE_ON_NOT_NORMAL_SPEED
+
+/** This is not the ideal place for this, but it is needed by VDPAU as well.
+ */
+pthread_mutex_t mlt_sdl_mutex = PTHREAD_MUTEX_INITIALIZER;
-/** Public final methods
-*/
+static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
+static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
+static void mlt_consumer_property_changed( mlt_properties owner, mlt_consumer this, char *name );
+static void apply_profile_properties( mlt_consumer this, mlt_profile profile, mlt_properties properties );
+static void on_consumer_frame_show( mlt_properties owner, mlt_consumer this, mlt_frame frame );
-int mlt_consumer_init( mlt_consumer this, void *child )
+/** Initialize a consumer service.
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this the consumer to initialize
+ * \param child a pointer to the object for the subclass
+ * \param profile the \p mlt_profile_s to use (optional but recommended,
+ * uses the environment variable MLT if this is NULL)
+ * \return true if there was an error
+ */
+
+int mlt_consumer_init( mlt_consumer this, void *child, mlt_profile profile )
{
+ int error = 0;
memset( this, 0, sizeof( struct mlt_consumer_s ) );
this->child = child;
- return mlt_service_init( &this->parent, this );
+ error = mlt_service_init( &this->parent, this );
+ if ( error == 0 )
+ {
+ // Get the properties from the service
+ mlt_properties properties = MLT_SERVICE_PROPERTIES( &this->parent );
+
+ // Apply profile to properties
+ if ( profile == NULL )
+ {
+ // Normally the application creates the profile and controls its lifetime
+ // This is the fallback exception handling
+ profile = mlt_profile_init( NULL );
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_properties_set_data( properties, "_profile", profile, 0, (mlt_destructor)mlt_profile_close, NULL );
+ }
+ apply_profile_properties( this, profile, properties );
+
+ // Default rescaler for all consumers
+ mlt_properties_set( properties, "rescale", "bilinear" );
+
+ // Default read ahead buffer size
+ mlt_properties_set_int( properties, "buffer", 25 );
+
+ // Default audio frequency and channels
+ mlt_properties_set_int( properties, "frequency", 48000 );
+ mlt_properties_set_int( properties, "channels", 2 );
+
+ // Default of all consumers is real time
+ mlt_properties_set_int( properties, "real_time", 1 );
+
+ // Default to environment test card
+ mlt_properties_set( properties, "test_card", mlt_environment( "MLT_TEST_CARD" ) );
+
+ // Hmm - default all consumers to yuv422 :-/
+ this->format = mlt_image_yuv422;
+
+ mlt_events_register( properties, "consumer-frame-show", ( mlt_transmitter )mlt_consumer_frame_show );
+ mlt_events_register( properties, "consumer-frame-render", ( mlt_transmitter )mlt_consumer_frame_render );
+ mlt_events_register( properties, "consumer-stopped", NULL );
+ mlt_events_listen( properties, this, "consumer-frame-show", ( mlt_listener )on_consumer_frame_show );
+
+ // Register a property-changed listener to handle the profile property -
+ // subsequent properties can override the profile
+ this->event_listener = mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_consumer_property_changed );
+
+ // Create the push mutex and condition
+ pthread_mutex_init( &this->put_mutex, NULL );
+ pthread_cond_init( &this->put_cond, NULL );
+
+ }
+ return error;
+}
+
+/** Convert the profile into properties on the consumer.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param this a consumer
+ * \param profile a profile
+ * \param properties a properties list (typically, the consumer's)
+ */
+
+static void apply_profile_properties( mlt_consumer this, mlt_profile profile, mlt_properties properties )
+{
+ mlt_event_block( this->event_listener );
+ mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
+ mlt_properties_set_int( properties, "frame_rate_num", profile->frame_rate_num );
+ mlt_properties_set_int( properties, "frame_rate_den", profile->frame_rate_den );
+ mlt_properties_set_int( properties, "width", profile->width );
+ mlt_properties_set_int( properties, "height", profile->height );
+ mlt_properties_set_int( properties, "progressive", profile->progressive );
+ mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
+ mlt_properties_set_int( properties, "sample_aspect_num", profile->sample_aspect_num );
+ mlt_properties_set_int( properties, "sample_aspect_den", profile->sample_aspect_den );
+ mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile ) );
+ mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
+ mlt_properties_set_int( properties, "display_aspect_num", profile->display_aspect_num );
+ mlt_properties_set_int( properties, "colorspace", profile->colorspace );
+ mlt_event_unblock( this->event_listener );
+}
+
+/** The property-changed event listener
+ *
+ * \private \memberof mlt_consumer_s
+ * \param owner the events object
+ * \param this the consumer
+ * \param name the name of the property that changed
+ */
+
+static void mlt_consumer_property_changed( mlt_properties owner, mlt_consumer this, char *name )
+{
+ if ( !strcmp( name, "profile" ) )
+ {
+ // Get the properies
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+
+ // Get the current profile
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+
+ // Load the new profile
+ mlt_profile new_profile = mlt_profile_init( mlt_properties_get( properties, name ) );
+
+ if ( new_profile )
+ {
+ // Copy the profile
+ if ( profile != NULL )
+ {
+ free( profile->description );
+ memcpy( profile, new_profile, sizeof( struct mlt_profile_s ) );
+ profile->description = strdup( new_profile->description );
+ mlt_profile_close( new_profile );
+ }
+ else
+ {
+ profile = new_profile;
+ }
+
+ // Apply to properties
+ apply_profile_properties( this, profile, properties );
+ }
+ }
+ else if ( !strcmp( name, "frame_rate_num" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ if ( profile )
+ {
+ profile->frame_rate_num = mlt_properties_get_int( properties, "frame_rate_num" );
+ mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
+ }
+ }
+ else if ( !strcmp( name, "frame_rate_den" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ if ( profile )
+ {
+ profile->frame_rate_den = mlt_properties_get_int( properties, "frame_rate_den" );
+ mlt_properties_set_double( properties, "fps", mlt_profile_fps( profile ) );
+ }
+ }
+ else if ( !strcmp( name, "width" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ if ( profile )
+ profile->width = mlt_properties_get_int( properties, "width" );
+ }
+ else if ( !strcmp( name, "height" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ if ( profile )
+ profile->height = mlt_properties_get_int( properties, "height" );
+ }
+ else if ( !strcmp( name, "progressive" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ if ( profile )
+ profile->progressive = mlt_properties_get_int( properties, "progressive" );
+ }
+ else if ( !strcmp( name, "sample_aspect_num" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ profile->sample_aspect_num = mlt_properties_get_int( properties, "sample_aspect_num" );
+ if ( profile )
+ mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
+ }
+ else if ( !strcmp( name, "sample_aspect_den" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ profile->sample_aspect_den = mlt_properties_get_int( properties, "sample_aspect_den" );
+ if ( profile )
+ mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
+ }
+ else if ( !strcmp( name, "display_aspect_num" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ if ( profile )
+ {
+ profile->display_aspect_num = mlt_properties_get_int( properties, "display_aspect_num" );
+ mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile ) );
+ }
+ }
+ else if ( !strcmp( name, "display_aspect_den" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ if ( profile )
+ {
+ profile->display_aspect_den = mlt_properties_get_int( properties, "display_aspect_den" );
+ mlt_properties_set_double( properties, "display_ratio", mlt_profile_dar( profile ) );
+ }
+ }
+ else if ( !strcmp( name, "colorspace" ) )
+ {
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ if ( profile )
+ profile->colorspace = mlt_properties_get_int( properties, "colorspace" );
+ }
+}
+
+/** The transmitter for the consumer-frame-show event
+ *
+ * Invokes the listener.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param listener a function pointer that will be invoked
+ * \param owner the events object that will be passed to \p listener
+ * \param this 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_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
+{
+ if ( listener != NULL )
+ listener( owner, this, ( mlt_frame )args[ 0 ] );
+}
+
+/** The transmitter for the consumer-frame-render event
+ *
+ * Invokes the listener.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param listener a function pointer that will be invoked
+ * \param owner the events object that will be passed to \p listener
+ * \param this 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_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
+{
+ if ( listener != NULL )
+ listener( owner, this, ( mlt_frame )args[ 0 ] );
+}
+
+/** A listener on the consumer-frame-show event
+ *
+ * Saves the position of the frame shown.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param owner the events object
+ * \param consumer the consumer on which this event occurred
+ * \param frame the frame that was shown
+ */
+
+static void on_consumer_frame_show( mlt_properties owner, mlt_consumer consumer, mlt_frame frame )
+{
+ if ( frame )
+ consumer->position = mlt_frame_get_position( frame );
+}
+
+/** Create a new consumer.
+ *
+ * \public \memberof mlt_consumer_s
+ * \param profile a profile (optional, but recommended)
+ * \return a new consumer
+ */
+
+mlt_consumer mlt_consumer_new( mlt_profile profile )
+{
+ // Create the memory for the structure
+ mlt_consumer this = malloc( sizeof( struct mlt_consumer_s ) );
+
+ // Initialise it
+ if ( this != NULL )
+ mlt_consumer_init( this, NULL, profile );
+
+ // Return it
+ return this;
}
/** Get the parent service object.
-*/
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \return the parent service class
+ * \see MLT_CONSUMER_SERVICE
+ */
mlt_service mlt_consumer_service( mlt_consumer this )
{
- return &this->parent;
+ return this != NULL ? &this->parent : NULL;
}
/** Get the consumer properties.
-*/
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \return the consumer's properties list
+ * \see MLT_CONSUMER_PROPERTIES
+ */
mlt_properties mlt_consumer_properties( mlt_consumer this )
{
- return mlt_service_properties( &this->parent );
+ return this != NULL ? MLT_SERVICE_PROPERTIES( &this->parent ) : NULL;
}
/** Connect the consumer to the producer.
-*/
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \param producer a producer
+ * \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 this consumer
+ */
int mlt_consumer_connect( mlt_consumer this, mlt_service producer )
{
}
/** Start the consumer.
-*/
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \return true if there was an error
+ */
int mlt_consumer_start( mlt_consumer this )
{
+ // Stop listening to the property-changed event
+ mlt_event_block( this->event_listener );
+
+ // Get the properies
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+
+ // Determine if there's a test card producer
+ char *test_card = mlt_properties_get( properties, "test_card" );
+
+ // Just to make sure nothing is hanging around...
+ mlt_frame_close( this->put );
+ this->put = NULL;
+ this->put_active = 1;
+
+ // Deal with it now.
+ if ( test_card != NULL )
+ {
+ if ( mlt_properties_get_data( properties, "test_card_producer", NULL ) == NULL )
+ {
+ // Create a test card producer
+ mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+ mlt_producer producer = mlt_factory_producer( profile, NULL, test_card );
+
+ // Do we have a producer
+ if ( producer != NULL )
+ {
+ // Test card should loop I guess...
+ mlt_properties_set( MLT_PRODUCER_PROPERTIES( producer ), "eof", "loop" );
+ //mlt_producer_set_speed( producer, 0 );
+ //mlt_producer_set_in_and_out( producer, 0, 0 );
+
+ // Set the test card on the consumer
+ mlt_properties_set_data( properties, "test_card_producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
+ }
+ }
+ }
+ else
+ {
+ // Allow the hash table to speed things up
+ mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
+ }
+
+ // Set the frame duration in microseconds for the frame-dropping heuristic
+ int frame_duration = 1000000 / mlt_properties_get_int( properties, "frame_rate_num" ) *
+ mlt_properties_get_int( properties, "frame_rate_den" );
+ mlt_properties_set_int( properties, "frame_duration", frame_duration );
+
+ // Check and run an ante command
+ if ( mlt_properties_get( properties, "ante" ) )
+ if ( system( mlt_properties_get( properties, "ante" ) ) == -1 )
+ mlt_log( MLT_CONSUMER_SERVICE( this ), MLT_LOG_ERROR, "system(%s) failed!\n", mlt_properties_get( properties, "ante" ) );
+
+ // Set the real_time preference
+ this->real_time = mlt_properties_get_int( properties, "real_time" );
+
+ // For worker threads implementation, buffer must be at least # threads
+ if ( abs( this->real_time ) > 1 && mlt_properties_get_int( properties, "buffer" ) <= abs( this->real_time ) )
+ mlt_properties_set_int( properties, "buffer", abs( this->real_time ) + 1 );
+
+ // Start the service
if ( this->start != NULL )
return this->start( this );
+
return 0;
}
+/** An alternative method to feed frames into the consumer.
+ *
+ * Only valid if the consumer itself is not connected.
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \param frame a frame
+ * \return true (ignore this for now)
+ */
+
+int mlt_consumer_put_frame( mlt_consumer this, mlt_frame frame )
+{
+ int error = 1;
+
+ // Get the service assoicated to the consumer
+ mlt_service service = MLT_CONSUMER_SERVICE( this );
+
+ if ( mlt_service_producer( service ) == NULL )
+ {
+ struct timeval now;
+ struct timespec tm;
+ pthread_mutex_lock( &this->put_mutex );
+ while ( this->put_active && this->put != NULL )
+ {
+ gettimeofday( &now, NULL );
+ tm.tv_sec = now.tv_sec + 1;
+ tm.tv_nsec = now.tv_usec * 1000;
+ pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
+ }
+ if ( this->put_active && this->put == NULL )
+ this->put = frame;
+ else
+ mlt_frame_close( frame );
+ pthread_cond_broadcast( &this->put_cond );
+ pthread_mutex_unlock( &this->put_mutex );
+ }
+ else
+ {
+ mlt_frame_close( frame );
+ }
+
+ return error;
+}
+
+/** Protected method for consumer to get frames from connected service
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \return a frame
+ */
+
+mlt_frame mlt_consumer_get_frame( mlt_consumer this )
+{
+ // Frame to return
+ mlt_frame frame = NULL;
+
+ // Get the service assoicated to the consumer
+ mlt_service service = MLT_CONSUMER_SERVICE( this );
+
+ // Get the consumer properties
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+
+ // Get the frame
+ if ( mlt_service_producer( service ) == NULL && mlt_properties_get_int( properties, "put_mode" ) )
+ {
+ struct timeval now;
+ struct timespec tm;
+ pthread_mutex_lock( &this->put_mutex );
+ while ( this->put_active && this->put == NULL )
+ {
+ gettimeofday( &now, NULL );
+ tm.tv_sec = now.tv_sec + 1;
+ tm.tv_nsec = now.tv_usec * 1000;
+ pthread_cond_timedwait( &this->put_cond, &this->put_mutex, &tm );
+ }
+ frame = this->put;
+ this->put = NULL;
+ pthread_cond_broadcast( &this->put_cond );
+ pthread_mutex_unlock( &this->put_mutex );
+ if ( frame != NULL )
+ mlt_service_apply_filters( service, frame, 0 );
+ }
+ else if ( mlt_service_producer( service ) != NULL )
+ {
+ mlt_service_get_frame( service, &frame, 0 );
+ }
+ else
+ {
+ frame = mlt_frame_init( service );
+ }
+
+ if ( frame != NULL )
+ {
+ // Get the frame properties
+ mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
+
+ // Get the test card producer
+ mlt_producer test_card = mlt_properties_get_data( properties, "test_card_producer", NULL );
+
+ // Attach the test frame producer to it.
+ if ( test_card != NULL )
+ mlt_properties_set_data( frame_properties, "test_card_producer", test_card, 0, NULL, NULL );
+
+ // Attach the rescale property
+ mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
+
+ // Aspect ratio and other jiggery pokery
+ mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
+ mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" ) );
+ mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
+ }
+
+ // Return the frame
+ return frame;
+}
+
+/** Compute the time difference between now and a time value.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param time1 a time value to be compared against now
+ * \return the difference in microseconds
+ */
+
+static inline long time_difference( struct timeval *time1 )
+{
+ struct timeval time2;
+ time2.tv_sec = time1->tv_sec;
+ time2.tv_usec = time1->tv_usec;
+ gettimeofday( time1, NULL );
+ return time1->tv_sec * 1000000 + time1->tv_usec - time2.tv_sec * 1000000 - time2.tv_usec;
+}
+
+/** The thread procedure for asynchronously pulling frames through the service
+ * network connected to a consumer.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param arg a consumer
+ */
+
+static void *consumer_read_ahead_thread( void *arg )
+{
+ // The argument is the consumer
+ mlt_consumer this = arg;
+
+ // Get the properties of the consumer
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+
+ // Get the width and height
+ int width = mlt_properties_get_int( properties, "width" );
+ int height = mlt_properties_get_int( properties, "height" );
+
+ // See if video is turned off
+ int video_off = mlt_properties_get_int( properties, "video_off" );
+ int preview_off = mlt_properties_get_int( properties, "preview_off" );
+ int preview_format = mlt_properties_get_int( properties, "preview_format" );
+
+ // Get the audio settings
+ mlt_audio_format afmt = mlt_audio_s16;
+ int counter = 0;
+ double fps = mlt_properties_get_double( properties, "fps" );
+ int channels = mlt_properties_get_int( properties, "channels" );
+ int frequency = mlt_properties_get_int( properties, "frequency" );
+ int samples = 0;
+ void *audio = NULL;
+
+ // See if audio is turned off
+ int audio_off = mlt_properties_get_int( properties, "audio_off" );
+
+ // Get the maximum size of the buffer
+ int buffer = mlt_properties_get_int( properties, "buffer" ) + 1;
+
+ // General frame variable
+ mlt_frame frame = NULL;
+ uint8_t *image = NULL;
+
+ // Time structures
+ struct timeval ante;
+
+ // Average time for get_frame and get_image
+ int count = 1;
+ int skipped = 0;
+ int64_t time_wait = 0;
+ int64_t time_frame = 0;
+ int64_t time_process = 0;
+ int skip_next = 0;
+
+ if ( preview_off && preview_format != 0 )
+ this->format = preview_format;
+
+ // Get the first frame
+ frame = mlt_consumer_get_frame( this );
+
+ // Get the image of the first frame
+ if ( !video_off )
+ {
+ mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
+ mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
+ }
+
+ if ( !audio_off )
+ {
+ samples = mlt_sample_calculator( fps, frequency, counter++ );
+ mlt_frame_get_audio( frame, &audio, &afmt, &frequency, &channels, &samples );
+ }
+
+ // Mark as rendered
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
+
+ // Get the starting time (can ignore the times above)
+ gettimeofday( &ante, NULL );
+
+ // Continue to read ahead
+ while ( this->ahead )
+ {
+ // Fetch width/height again
+ width = mlt_properties_get_int( properties, "width" );
+ height = mlt_properties_get_int( properties, "height" );
+
+ // Put the current frame into the queue
+ pthread_mutex_lock( &this->queue_mutex );
+ while( this->ahead && mlt_deque_count( this->queue ) >= buffer )
+ pthread_cond_wait( &this->queue_cond, &this->queue_mutex );
+ mlt_deque_push_back( this->queue, frame );
+ pthread_cond_broadcast( &this->queue_cond );
+ pthread_mutex_unlock( &this->queue_mutex );
+
+ time_wait += time_difference( &ante );
+
+ // Get the next frame
+ frame = mlt_consumer_get_frame( this );
+ time_frame += time_difference( &ante );
+
+ // If there's no frame, we're probably stopped...
+ if ( frame == NULL )
+ continue;
+
+ // Increment the count
+ count ++;
+
+ // All non normal playback frames should be shown
+ if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
+ {
+#ifdef DEINTERLACE_ON_NOT_NORMAL_SPEED
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
+#endif
+ skipped = 0;
+ time_frame = 0;
+ time_process = 0;
+ time_wait = 0;
+ count = 1;
+ skip_next = 0;
+ }
+
+ // Get the image
+ if ( !skip_next || this->real_time == -1 )
+ {
+ // Get the image, mark as rendered and time it
+ if ( !video_off )
+ {
+ mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
+ mlt_frame_get_image( frame, &image, &this->format, &width, &height, 0 );
+ }
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
+ }
+ else
+ {
+ // Increment the number of sequentially skipped frames
+ skipped ++;
+ skip_next = 0;
+
+ // If we've reached an unacceptable level, reset everything
+ if ( skipped > fps * 2 )
+ {
+ skipped = 0;
+ time_frame = 0;
+ time_process = 0;
+ time_wait = 0;
+ count = 1;
+ }
+ }
+
+ // Always process audio
+ if ( !audio_off )
+ {
+ samples = mlt_sample_calculator( fps, frequency, counter++ );
+ mlt_frame_get_audio( frame, &audio, &afmt, &frequency, &channels, &samples );
+ }
+
+ // Increment the time take for this frame
+ time_process += time_difference( &ante );
+
+ // Determine if the next frame should be skipped
+ if ( mlt_deque_count( this->queue ) <= 5 )
+ {
+ int frame_duration = mlt_properties_get_int( properties, "frame_duration" );
+ if ( ( ( time_wait + time_frame + time_process ) / count ) > frame_duration )
+ skip_next = 1;
+ }
+ }
+
+ // Remove the last frame
+ mlt_frame_close( frame );
+
+ return NULL;
+}
+
+/** Locate the first unprocessed frame in the queue.
+ *
+ * When playing with realtime behavior, we do not use the true head, but
+ * rather an adjusted process_head. The process_head is adjusted based on
+ * the rate of frame-dropping or recovery from frame-dropping. The idea is
+ * that as the level of frame-dropping increases to move the process_head
+ * closer to the tail because the frames are not completing processing prior
+ * to their playout! Then, as frames are not dropped the process_head moves
+ * back closer to the head of the queue so that worker threads can work
+ * ahead of the playout point (queue head).
+ *
+ * \private \memberof mlt_consumer_s
+ * \param this a consumer
+ * \return an index into the queue
+ */
+
+static inline int first_unprocessed_frame( mlt_consumer this )
+{
+ int index = this->real_time <= 0 ? 0 : this->process_head;
+ while ( index < mlt_deque_count( this->queue ) && MLT_FRAME( mlt_deque_peek( this->queue, index ) )->is_processing )
+ index++;
+ return index;
+}
+
+/** The worker thread procedure for parallel processing frames.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param arg a consumer
+ */
+
+static void *consumer_worker_thread( void *arg )
+{
+ // The argument is the consumer
+ mlt_consumer this = arg;
+
+ // Get the properties of the consumer
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+
+ // Get the width and height
+ int width = mlt_properties_get_int( properties, "width" );
+ int height = mlt_properties_get_int( properties, "height" );
+ mlt_image_format format = this->format;
+
+ // See if video is turned off
+ int video_off = mlt_properties_get_int( properties, "video_off" );
+ int preview_off = mlt_properties_get_int( properties, "preview_off" );
+ int preview_format = mlt_properties_get_int( properties, "preview_format" );
+
+ // General frame variable
+ mlt_frame frame = NULL;
+ uint8_t *image = NULL;
+
+ if ( preview_off && preview_format != 0 )
+ format = preview_format;
+
+ // Continue to read ahead
+ while ( this->ahead )
+ {
+ // Get the next unprocessed frame from the work queue
+ pthread_mutex_lock( &this->queue_mutex );
+ int index = first_unprocessed_frame( this );
+ while ( this->ahead && index >= mlt_deque_count( this->queue ) )
+ {
+ mlt_log_debug( MLT_CONSUMER_SERVICE(this), "waiting in worker index = %d queue count = %d\n",
+ index, mlt_deque_count( this->queue ) );
+ pthread_cond_wait( &this->queue_cond, &this->queue_mutex );
+ index = first_unprocessed_frame( this );
+ }
+ pthread_mutex_unlock( &this->queue_mutex );
+
+ // Mark the frame for processing
+ frame = mlt_deque_peek( this->queue, index );
+ if ( frame )
+ {
+ mlt_log_debug( MLT_CONSUMER_SERVICE(this), "worker processing index = %d frame %d queue count = %d\n",
+ index, mlt_frame_get_position(frame), mlt_deque_count( this->queue ) );
+ frame->is_processing = 1;
+ mlt_properties_inc_ref( MLT_FRAME_PROPERTIES( frame ) );
+ }
+
+ // If there's no frame, we're probably stopped...
+ if ( frame == NULL )
+ continue;
+
+#ifdef DEINTERLACE_ON_NOT_NORMAL_SPEED
+ // All non normal playback frames should be shown
+ if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "_speed" ) != 1 )
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "consumer_deinterlace", 1 );
+#endif
+
+ // Get the image
+ if ( !video_off )
+ {
+ // Fetch width/height again
+ width = mlt_properties_get_int( properties, "width" );
+ height = mlt_properties_get_int( properties, "height" );
+ mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-frame-render", frame, NULL );
+ mlt_frame_get_image( frame, &image, &format, &width, &height, 0 );
+ }
+ mlt_frame_close( frame );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
+
+ // Tell a waiting thread (non-realtime main consumer thread) that we are done.
+ pthread_mutex_lock( &this->done_mutex );
+ pthread_cond_broadcast( &this->done_cond );
+ pthread_mutex_unlock( &this->done_mutex );
+ }
+
+ return NULL;
+}
+
+/** Start the read/render thread.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param this a consumer
+ */
+
+static void consumer_read_ahead_start( mlt_consumer this )
+{
+ // We're running now
+ this->ahead = 1;
+
+ // Create the frame queue
+ this->queue = mlt_deque_init( );
+
+ // Create the queue mutex
+ pthread_mutex_init( &this->queue_mutex, NULL );
+
+ // Create the condition
+ pthread_cond_init( &this->queue_cond, NULL );
+
+ // Create the read ahead
+ if ( mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "priority" ) )
+ {
+ struct sched_param priority;
+ priority.sched_priority = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( this ), "priority" );
+ pthread_attr_t thread_attributes;
+ pthread_attr_init( &thread_attributes );
+ pthread_attr_setschedpolicy( &thread_attributes, SCHED_OTHER );
+ pthread_attr_setschedparam( &thread_attributes, &priority );
+ pthread_attr_setinheritsched( &thread_attributes, PTHREAD_EXPLICIT_SCHED );
+ pthread_attr_setscope( &thread_attributes, PTHREAD_SCOPE_SYSTEM );
+ if ( pthread_create( &this->ahead_thread, &thread_attributes, consumer_read_ahead_thread, this ) < 0 )
+ pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
+ pthread_attr_destroy( &thread_attributes );
+ }
+ else
+ {
+ pthread_create( &this->ahead_thread, NULL, consumer_read_ahead_thread, this );
+ }
+}
+
+/** Start the worker threads.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param this a consumer
+ */
+
+static void consumer_work_start( mlt_consumer this )
+{
+ int n = abs( this->real_time );
+ pthread_t thread;
+
+ // We're running now
+ this->ahead = 1;
+
+ // These keep track of the accelleration of frame dropping or recovery.
+ this->consecutive_dropped = 0;
+ this->consecutive_rendered = 0;
+
+ // This is the position in the queue from which to look for a frame to process.
+ // If we always start from the head, then we may likely not complete processing
+ // before the frame is played out.
+ this->process_head = 0;
+
+ // Create the queues
+ this->queue = mlt_deque_init();
+ this->worker_threads = mlt_deque_init();
+
+ // Create the mutexes
+ pthread_mutex_init( &this->queue_mutex, NULL );
+ pthread_mutex_init( &this->done_mutex, NULL );
+
+ // Create the conditions
+ pthread_cond_init( &this->queue_cond, NULL );
+ pthread_cond_init( &this->done_cond, NULL );
+
+ // Create the read ahead
+ if ( mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "priority" ) )
+ {
+
+ struct sched_param priority;
+ pthread_attr_t thread_attributes;
+
+ priority.sched_priority = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( this ), "priority" );
+ pthread_attr_init( &thread_attributes );
+ pthread_attr_setschedpolicy( &thread_attributes, SCHED_OTHER );
+ pthread_attr_setschedparam( &thread_attributes, &priority );
+ pthread_attr_setinheritsched( &thread_attributes, PTHREAD_EXPLICIT_SCHED );
+ pthread_attr_setscope( &thread_attributes, PTHREAD_SCOPE_SYSTEM );
+
+ while ( n-- )
+ {
+ if ( pthread_create( &thread, &thread_attributes, consumer_read_ahead_thread, this ) < 0 )
+ if ( pthread_create( &thread, NULL, consumer_read_ahead_thread, this ) == 0 )
+ mlt_deque_push_back( this->worker_threads, (void*) thread );
+ }
+ pthread_attr_destroy( &thread_attributes );
+ }
+
+ else
+ {
+ while ( n-- )
+ {
+ if ( pthread_create( &thread, NULL, consumer_worker_thread, this ) == 0 )
+ mlt_deque_push_back( this->worker_threads, (void*) thread );
+ }
+ }
+}
+
+/** Stop the read/render thread.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param this a consumer
+ */
+
+static void consumer_read_ahead_stop( mlt_consumer this )
+{
+ // Make sure we're running
+ if ( this->ahead )
+ {
+ // Inform thread to stop
+ this->ahead = 0;
+
+ // Broadcast to the condition in case it's waiting
+ pthread_mutex_lock( &this->queue_mutex );
+ pthread_cond_broadcast( &this->queue_cond );
+ pthread_mutex_unlock( &this->queue_mutex );
+
+ // Broadcast to the put condition in case it's waiting
+ pthread_mutex_lock( &this->put_mutex );
+ pthread_cond_broadcast( &this->put_cond );
+ pthread_mutex_unlock( &this->put_mutex );
+
+ // Join the thread
+ pthread_join( this->ahead_thread, NULL );
+
+ // Destroy the frame queue mutex
+ pthread_mutex_destroy( &this->queue_mutex );
+
+ // Destroy the condition
+ pthread_cond_destroy( &this->queue_cond );
+
+ // Wipe the queue
+ while ( mlt_deque_count( this->queue ) )
+ mlt_frame_close( mlt_deque_pop_back( this->queue ) );
+
+ // Close the queue
+ mlt_deque_close( this->queue );
+ }
+}
+
+/** Stop the worker threads.
+ *
+ * \private \memberof mlt_consumer_s
+ * \param this a consumer
+ */
+
+static void consumer_work_stop( mlt_consumer this )
+{
+ // Make sure we're running
+ if ( this->ahead )
+ {
+ // Inform thread to stop
+ this->ahead = 0;
+
+ // Broadcast to the queue condition in case it's waiting
+ pthread_mutex_lock( &this->queue_mutex );
+ pthread_cond_broadcast( &this->queue_cond );
+ pthread_mutex_unlock( &this->queue_mutex );
+
+ // Broadcast to the put condition in case it's waiting
+ pthread_mutex_lock( &this->put_mutex );
+ pthread_cond_broadcast( &this->put_cond );
+ pthread_mutex_unlock( &this->put_mutex );
+
+ // Join the threads
+ pthread_t thread;
+ while ( ( thread = (pthread_t) mlt_deque_pop_front( this->worker_threads ) ) )
+ pthread_join( thread, NULL );
+
+ // Destroy the mutexes
+ pthread_mutex_destroy( &this->queue_mutex );
+ pthread_mutex_destroy( &this->done_mutex );
+
+ // Destroy the conditions
+ pthread_cond_destroy( &this->queue_cond );
+ pthread_cond_destroy( &this->done_cond );
+
+ // Wipe the queues
+ while ( mlt_deque_count( this->queue ) )
+ mlt_frame_close( mlt_deque_pop_back( this->queue ) );
+
+ // Close the queues
+ mlt_deque_close( this->queue );
+ mlt_deque_close( this->worker_threads );
+ }
+}
+
+/** Flush the read/render thread's buffer.
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ */
+
+void mlt_consumer_purge( mlt_consumer this )
+{
+ if ( this->ahead )
+ {
+ pthread_mutex_lock( &this->queue_mutex );
+ while ( mlt_deque_count( this->queue ) )
+ mlt_frame_close( mlt_deque_pop_back( this->queue ) );
+ pthread_cond_broadcast( &this->queue_cond );
+ pthread_mutex_unlock( &this->queue_mutex );
+ }
+}
+
+/** Use multiple worker threads and a work queue.
+ */
+
+static mlt_frame worker_get_frame( mlt_consumer this, mlt_properties properties )
+{
+ // Frame to return
+ mlt_frame frame = NULL;
+
+ int size = abs( this->real_time );
+ int buffer = mlt_properties_get_int( properties, "buffer" );
+ // This is a heuristic to determine a suitable minimum buffer size for the number of threads.
+ int headroom = 2 + size * size;
+ buffer = buffer < headroom ? headroom : buffer;
+
+ // Start worker threads if not already started.
+ if ( ! this->ahead )
+ {
+ int prefill = mlt_properties_get_int( properties, "prefill" );
+ prefill = prefill > 0 && prefill < buffer ? prefill : buffer;
+
+ consumer_work_start( this );
+
+ // Fill the work queue.
+ int i = buffer;
+ while ( i-- )
+ {
+ frame = mlt_consumer_get_frame( this );
+ if ( frame )
+ {
+ pthread_mutex_lock( &this->queue_mutex );
+ mlt_deque_push_back( this->queue, frame );
+ pthread_cond_signal( &this->queue_cond );
+ pthread_mutex_unlock( &this->queue_mutex );
+ }
+ }
+
+ // Wait for prefill
+ while ( this->ahead && first_unprocessed_frame( this ) < prefill )
+ {
+ pthread_mutex_lock( &this->done_mutex );
+ pthread_cond_wait( &this->done_cond, &this->done_mutex );
+ pthread_mutex_unlock( &this->done_mutex );
+ }
+ this->process_head = size;
+ }
+
+ mlt_log_debug( MLT_CONSUMER_SERVICE(this), "size %d done count %d work count %d process_head %d\n",
+ size, first_unprocessed_frame( this ), mlt_deque_count( this->queue ), this->process_head );
+
+ // Feed the work queue
+ frame = mlt_consumer_get_frame( this );
+ if ( ! frame )
+ return frame;
+ pthread_mutex_lock( &this->queue_mutex );
+ mlt_deque_push_back( this->queue, frame );
+ pthread_cond_signal( &this->queue_cond );
+ pthread_mutex_unlock( &this->queue_mutex );
+
+ // Wait if not realtime.
+ while( this->ahead && this->real_time < 0 &&
+ ! mlt_properties_get_int( MLT_FRAME_PROPERTIES( MLT_FRAME( mlt_deque_peek_front( this->queue ) ) ), "rendered" ) )
+ {
+ pthread_mutex_lock( &this->done_mutex );
+ pthread_cond_wait( &this->done_cond, &this->done_mutex );
+ pthread_mutex_unlock( &this->done_mutex );
+ }
+
+ // Get the frame from the queue.
+ pthread_mutex_lock( &this->queue_mutex );
+ frame = mlt_deque_pop_front( this->queue );
+ pthread_mutex_unlock( &this->queue_mutex );
+
+ // Adapt the worker process head to the runtime conditions.
+ if ( this->real_time > 0 )
+ {
+ if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame ), "rendered" ) )
+ {
+ this->consecutive_dropped = 0;
+ if ( this->process_head > size && this->consecutive_rendered >= this->process_head )
+ this->process_head--;
+ else
+ this->consecutive_rendered++;
+ }
+ else
+ {
+ this->consecutive_rendered = 0;
+ if ( this->process_head < buffer - size && this->consecutive_dropped > size )
+ this->process_head++;
+ else
+ this->consecutive_dropped++;
+ }
+ mlt_log_debug( MLT_CONSUMER_SERVICE(this), "dropped %d rendered %d process_head %d\n",
+ this->consecutive_dropped, this->consecutive_rendered, this->process_head );
+ }
+
+ return frame;
+}
+
+/** Get the next frame from the producer connected to a consumer.
+ *
+ * Typically, one uses this instead of \p mlt_consumer_get_frame to make
+ * the asynchronous/real-time behavior configurable at runtime.
+ * You should close the frame returned from this when you are done with it.
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \return a frame
+ */
+
+mlt_frame mlt_consumer_rt_frame( mlt_consumer this )
+{
+ // Frame to return
+ mlt_frame frame = NULL;
+
+ // Get the properties
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+
+ // Check if the user has requested real time or not
+ if ( this->real_time > 1 || this->real_time < -1 )
+ {
+ // see above
+ return worker_get_frame( this, properties );
+ }
+ else if ( this->real_time == 1 || this->real_time == -1 )
+ {
+ int size = 1;
+
+ // Is the read ahead running?
+ if ( this->ahead == 0 )
+ {
+ int buffer = mlt_properties_get_int( properties, "buffer" );
+ int prefill = mlt_properties_get_int( properties, "prefill" );
+ consumer_read_ahead_start( this );
+ if ( buffer > 1 )
+ size = prefill > 0 && prefill < buffer ? prefill : buffer;
+ }
+
+ // Get frame from queue
+ pthread_mutex_lock( &this->queue_mutex );
+ while( this->ahead && mlt_deque_count( this->queue ) < size )
+ pthread_cond_wait( &this->queue_cond, &this->queue_mutex );
+ frame = mlt_deque_pop_front( this->queue );
+ pthread_cond_broadcast( &this->queue_cond );
+ pthread_mutex_unlock( &this->queue_mutex );
+ }
+ else // real_time == 0
+ {
+ // Get the frame in non real time
+ frame = mlt_consumer_get_frame( this );
+
+ // This isn't true, but from the consumers perspective it is
+ if ( frame != NULL )
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
+ }
+
+ return frame;
+}
+
+/** Callback for the implementation to indicate a stopped condition.
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ */
+
+void mlt_consumer_stopped( mlt_consumer this )
+{
+ mlt_properties_set_int( MLT_CONSUMER_PROPERTIES( this ), "running", 0 );
+ mlt_events_fire( MLT_CONSUMER_PROPERTIES( this ), "consumer-stopped", NULL );
+ mlt_event_unblock( this->event_listener );
+}
+
/** Stop the consumer.
-*/
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \return true if there was an error
+ */
int mlt_consumer_stop( mlt_consumer this )
{
+ // Get the properies
+ mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+
+ // Just in case...
+ mlt_log( MLT_CONSUMER_SERVICE( this ), MLT_LOG_DEBUG, "stopping put waiting\n" );
+ pthread_mutex_lock( &this->put_mutex );
+ this->put_active = 0;
+ pthread_cond_broadcast( &this->put_cond );
+ pthread_mutex_unlock( &this->put_mutex );
+
+ // Stop the consumer
+ mlt_log( MLT_CONSUMER_SERVICE( this ), MLT_LOG_DEBUG, "stopping consumer\n" );
if ( this->stop != NULL )
- return this->stop( this );
+ this->stop( this );
+
+ // Check if the user has requested real time or not and stop if necessary
+ mlt_log( MLT_CONSUMER_SERVICE( this ), MLT_LOG_DEBUG, "stopping read_ahead\n" );
+ if ( abs( this->real_time ) == 1 )
+ consumer_read_ahead_stop( this );
+ else if ( abs( this->real_time ) > 1 )
+ consumer_work_stop( this );
+
+ // Kill the test card
+ mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
+
+ // Check and run a post command
+ if ( mlt_properties_get( properties, "post" ) )
+ if (system( mlt_properties_get( properties, "post" ) ) == -1 )
+ mlt_log( MLT_CONSUMER_SERVICE( this ), MLT_LOG_ERROR, "system(%s) failed!\n", mlt_properties_get( properties, "post" ) );
+
+ mlt_log( MLT_CONSUMER_SERVICE( this ), MLT_LOG_DEBUG, "stopped\n" );
+
return 0;
}
/** Determine if the consumer is stopped.
-*/
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ * \return true if the consumer is stopped
+ */
int mlt_consumer_is_stopped( mlt_consumer this )
{
+ // Check if the consumer is stopped
if ( this->is_stopped != NULL )
return this->is_stopped( this );
+
return 0;
}
-/** Close the consumer.
-*/
+/** Close and destroy the consumer.
+ *
+ * \public \memberof mlt_consumer_s
+ * \param this a consumer
+ */
void mlt_consumer_close( mlt_consumer this )
{
- // Get the childs close function
- void ( *consumer_close )( ) = this->close;
+ if ( this != NULL && mlt_properties_dec_ref( MLT_CONSUMER_PROPERTIES( this ) ) <= 0 )
+ {
+ // Get the childs close function
+ void ( *consumer_close )( ) = this->close;
- // Make sure it only gets called once
- this->close = NULL;
+ if ( consumer_close )
+ {
+ // Just in case...
+ //mlt_consumer_stop( this );
- // Call the childs close if available
- if ( consumer_close != NULL )
- consumer_close( this );
- else
- mlt_service_close( &this->parent );
+ this->close = NULL;
+ consumer_close( this );
+ }
+ else
+ {
+ // Make sure it only gets called once
+ this->parent.close = NULL;
+
+ // Destroy the push mutex and condition
+ pthread_mutex_destroy( &this->put_mutex );
+ pthread_cond_destroy( &this->put_cond );
+
+ mlt_service_close( &this->parent );
+ }
+ }
}
+/** Get the position of the last frame shown.
+ *
+ * \public \memberof mlt_consumer_s
+ * \param consumer a consumer
+ * \return the position
+ */
+
+mlt_position mlt_consumer_position( mlt_consumer consumer )
+{
+ return consumer->position;
+}
+
projects / mlt / blobdiff