-/*
- * 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
+ *
+ * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
+ * \author Charles Yates <charles.yates@pandora.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
#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;
+
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_service owner, mlt_consumer this, char *name );
+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 );
-/** Public final methods
-*/
+/** 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 )
{
{
// Get the properties from the service
mlt_properties properties = MLT_SERVICE_PROPERTIES( &this->parent );
-
+
// Apply profile to properties
if ( profile == NULL )
{
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
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, "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 );
}
-static void mlt_consumer_property_changed( mlt_service owner, mlt_consumer this, char *name )
+/** 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" ) )
{
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 )
{
}
/** 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 )
{
}
/** 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 )
{
}
/** 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 )
{
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" ) )
- system( 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" );
return 0;
}
-/** An alternative method to feed frames into the consumer - only valid if
- the consumer itself is not connected.
-*/
+/** 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 )
{
}
/** 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 )
{
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;
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
int preview_format = mlt_properties_get_int( properties, "preview_format" );
// Get the audio settings
- mlt_audio_format afmt = mlt_audio_pcm;
+ 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;
- int16_t *pcm = NULL;
+ void *audio = NULL;
// See if audio is turned off
int audio_off = mlt_properties_get_int( properties, "audio_off" );
if ( !audio_off )
{
samples = mlt_sample_calculator( fps, frequency, counter++ );
- mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
+ mlt_frame_get_audio( frame, &audio, &afmt, &frequency, &channels, &samples );
}
// Unlock the lock object
if ( !audio_off )
{
samples = mlt_sample_calculator( fps, frequency, counter++ );
- mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
+ mlt_frame_get_audio( frame, &audio, &afmt, &frequency, &channels, &samples );
}
// Increment the time take for this frame
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
// Create the condition
pthread_cond_init( &this->cond, NULL );
- // Create the read ahead
+ // Create the read ahead
if ( mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "priority" ) )
{
struct sched_param priority;
}
}
+/** 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
}
}
+/** 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 )
}
}
+/** 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
if ( buffer > 1 )
size = prefill > 0 && prefill < buffer ? prefill : buffer;
}
-
+
// Get frame from queue
pthread_mutex_lock( &this->mutex );
while( this->ahead && mlt_deque_count( this->queue ) < size )
}
/** 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 )
{
}
/** 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 );
- char *debug = mlt_properties_get( MLT_CONSUMER_PROPERTIES( this ), "debug" );
// Just in case...
- if ( debug ) fprintf( stderr, "%s: stopping put waiting\n", debug );
+ 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
- if ( debug ) fprintf( stderr, "%s: stopping consumer\n", debug );
+ mlt_log( MLT_CONSUMER_SERVICE( this ), MLT_LOG_DEBUG, "stopping consumer\n" );
if ( this->stop != NULL )
this->stop( this );
// Check if the user has requested real time or not and stop if necessary
- if ( debug ) fprintf( stderr, "%s: stopping read_ahead\n", debug );
+ mlt_log( MLT_CONSUMER_SERVICE( this ), MLT_LOG_DEBUG, "stopping read_ahead\n" );
if ( mlt_properties_get_int( properties, "real_time" ) )
consumer_read_ahead_stop( this );
// Check and run a post command
if ( mlt_properties_get( properties, "post" ) )
- system( 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" ) );
- if ( debug ) fprintf( stderr, "%s: stopped\n", debug );
+ 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 )
{
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 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