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mlt_consumer.c
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mlt_consumer.c
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/**
* \file mlt_consumer.c
* \brief abstraction for all consumer services
* \see mlt_consumer_s
*
* Copyright (C) 2003-2010 Ushodaya Enterprises Limited
* \author Charles Yates <charles.yates@pandora.be>
* \author Dan Dennedy <dan@dennedy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "mlt_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;
static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service self, void **args );
static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service self, void **args );
static void mlt_consumer_property_changed( mlt_properties owner, mlt_consumer self, char *name );
static void apply_profile_properties( mlt_consumer self, mlt_profile profile, mlt_properties properties );
static void on_consumer_frame_show( mlt_properties owner, mlt_consumer self, mlt_frame frame );
/** Initialize a consumer service.
*
* \public \memberof mlt_consumer_s
* \param self 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 self is NULL)
* \return true if there was an error
*/
int mlt_consumer_init( mlt_consumer self, void *child, mlt_profile profile )
{
int error = 0;
memset( self, 0, sizeof( struct mlt_consumer_s ) );
self->child = child;
error = mlt_service_init( &self->parent, self );
if ( error == 0 )
{
// Get the properties from the service
mlt_properties properties = MLT_SERVICE_PROPERTIES( &self->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( self );
mlt_properties_set_data( properties, "_profile", profile, 0, (mlt_destructor)mlt_profile_close, NULL );
}
apply_profile_properties( self, 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 );
mlt_properties_set_int( properties, "drop_max", 5 );
// 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 :-/
self->format = mlt_image_yuv422;
mlt_properties_set( properties, "mlt_image_format", mlt_image_format_name( self->format ) );
mlt_properties_set( properties, "mlt_audio_format", mlt_audio_format_name( mlt_audio_s16 ) );
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, self, "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
self->event_listener = mlt_events_listen( properties, self, "property-changed", ( mlt_listener )mlt_consumer_property_changed );
// Create the push mutex and condition
pthread_mutex_init( &self->put_mutex, NULL );
pthread_cond_init( &self->put_cond, NULL );
}
return error;
}
/** Convert the profile into properties on the consumer.
*
* \private \memberof mlt_consumer_s
* \param self a consumer
* \param profile a profile
* \param properties a properties list (typically, the consumer's)
*/
static void apply_profile_properties( mlt_consumer self, mlt_profile profile, mlt_properties properties )
{
mlt_event_block( self->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( self->event_listener );
}
/** The property-changed event listener
*
* \private \memberof mlt_consumer_s
* \param owner the events object
* \param self the consumer
* \param name the name of the property that changed
*/
static void mlt_consumer_property_changed( mlt_properties owner, mlt_consumer self, char *name )
{
if ( !strcmp( name, "mlt_profile" ) )
{
// Get the properies
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
// Get the current profile
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
// 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 );
}
else
{
profile = new_profile;
}
// Apply to properties
apply_profile_properties( self, profile, properties );
mlt_profile_close( new_profile );
}
}
else if ( !strcmp( name, "frame_rate_num" ) )
{
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
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( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
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( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
if ( profile )
profile->width = mlt_properties_get_int( properties, "width" );
}
else if ( !strcmp( name, "height" ) )
{
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
if ( profile )
profile->height = mlt_properties_get_int( properties, "height" );
}
else if ( !strcmp( name, "progressive" ) )
{
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
if ( profile )
profile->progressive = mlt_properties_get_int( properties, "progressive" );
}
else if ( !strcmp( name, "sample_aspect_num" ) )
{
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
if ( profile )
{
profile->sample_aspect_num = mlt_properties_get_int( properties, "sample_aspect_num" );
mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
}
}
else if ( !strcmp( name, "sample_aspect_den" ) )
{
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
if ( profile )
{
profile->sample_aspect_den = mlt_properties_get_int( properties, "sample_aspect_den" );
mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( profile ) );
}
}
else if ( !strcmp( name, "display_aspect_num" ) )
{
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
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( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
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( self );
mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( self ) );
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 self a service that will be passed to \p listener
* \param args an array of pointers - the first entry is passed as a frame to \p listener
*/
static void mlt_consumer_frame_show( mlt_listener listener, mlt_properties owner, mlt_service self, void **args )
{
if ( listener != NULL )
listener( owner, self, ( 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 self a service that will be passed to \p listener
* \param args an array of pointers - the first entry is passed as a frame to \p listener
*/
static void mlt_consumer_frame_render( mlt_listener listener, mlt_properties owner, mlt_service self, void **args )
{
if ( listener != NULL )
listener( owner, self, ( 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 self = malloc( sizeof( struct mlt_consumer_s ) );
// Initialise it
if ( self != NULL && mlt_consumer_init( self, NULL, profile ) == 0 )
{
// Return it
return self;
}
else
{
free(self);
return NULL;
}
}
/** Get the parent service object.
*
* \public \memberof mlt_consumer_s
* \param self a consumer
* \return the parent service class
* \see MLT_CONSUMER_SERVICE
*/
mlt_service mlt_consumer_service( mlt_consumer self )
{
return self != NULL ? &self->parent : NULL;
}
/** Get the consumer properties.
*
* \public \memberof mlt_consumer_s
* \param self a consumer
* \return the consumer's properties list
* \see MLT_CONSUMER_PROPERTIES
*/
mlt_properties mlt_consumer_properties( mlt_consumer self )
{
return self != NULL ? MLT_SERVICE_PROPERTIES( &self->parent ) : NULL;
}
/** Connect the consumer to the producer.
*
* \public \memberof mlt_consumer_s
* \param self 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 self, mlt_service producer )
{
return mlt_service_connect_producer( &self->parent, producer, 0 );
}
/** Start the consumer.
*
* \public \memberof mlt_consumer_s
* \param self a consumer
* \return true if there was an error
*/
int mlt_consumer_start( mlt_consumer self )
{
if ( !mlt_consumer_is_stopped( self ) )
return 0;
// Stop listening to the property-changed event
mlt_event_block( self->event_listener );
// Get the properies
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
// 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...
pthread_mutex_lock( &self->put_mutex );
self->put = NULL;
self->put_active = 1;
pthread_mutex_unlock( &self->put_mutex );
// 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( self ) );
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 );
}
// The profile could have changed between a stop and a restart.
apply_profile_properties( self, mlt_service_profile( MLT_CONSUMER_SERVICE(self) ), properties );
// Set the frame duration in microseconds for the frame-dropping heuristic
int frame_rate_num = mlt_properties_get_int( properties, "frame_rate_num" );
int frame_rate_den = mlt_properties_get_int( properties, "frame_rate_den" );
int frame_duration = 0;
if ( frame_rate_num && frame_rate_den )
{
frame_duration = 1000000 / frame_rate_num * 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( self ), MLT_LOG_ERROR, "system(%s) failed!\n", mlt_properties_get( properties, "ante" ) );
// Set the real_time preference
self->real_time = mlt_properties_get_int( properties, "real_time" );
// For worker threads implementation, buffer must be at least # threads
if ( abs( self->real_time ) > 1 && mlt_properties_get_int( properties, "buffer" ) <= abs( self->real_time ) )
mlt_properties_set_int( properties, "_buffer", abs( self->real_time ) + 1 );
// Get the image format to use for rendering threads
const char* format = mlt_properties_get( properties, "mlt_image_format" );
if ( format )
{
if ( !strcmp( format, "rgb24" ) )
self->format = mlt_image_rgb24;
else if ( !strcmp( format, "rgb24a" ) )
self->format = mlt_image_rgb24a;
else if ( !strcmp( format, "yuv420p" ) )
self->format = mlt_image_yuv420p;
else if ( !strcmp( format, "none" ) )
self->format = mlt_image_none;
else
self->format = mlt_image_yuv422;
}
// Start the service
if ( self->start != NULL )
return self->start( self );
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 self a consumer
* \param frame a frame
* \return true (ignore self for now)
*/
int mlt_consumer_put_frame( mlt_consumer self, mlt_frame frame )
{
int error = 1;
// Get the service assoicated to the consumer
mlt_service service = MLT_CONSUMER_SERVICE( self );
if ( mlt_service_producer( service ) == NULL )
{
struct timeval now;
struct timespec tm;
pthread_mutex_lock( &self->put_mutex );
while ( self->put_active && self->put != NULL )
{
gettimeofday( &now, NULL );
tm.tv_sec = now.tv_sec + 1;
tm.tv_nsec = now.tv_usec * 1000;
pthread_cond_timedwait( &self->put_cond, &self->put_mutex, &tm );
}
if ( self->put_active && self->put == NULL )
self->put = frame;
else
mlt_frame_close( frame );
pthread_cond_broadcast( &self->put_cond );
pthread_mutex_unlock( &self->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 self a consumer
* \return a frame
*/
mlt_frame mlt_consumer_get_frame( mlt_consumer self )
{
// Frame to return
mlt_frame frame = NULL;
// Get the service assoicated to the consumer
mlt_service service = MLT_CONSUMER_SERVICE( self );
// Get the consumer properties
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
// 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( &self->put_mutex );
while ( self->put_active && self->put == NULL )
{
gettimeofday( &now, NULL );
tm.tv_sec = now.tv_sec + 1;
tm.tv_nsec = now.tv_usec * 1000;
pthread_cond_timedwait( &self->put_cond, &self->put_mutex, &tm );
}
frame = self->put;
self->put = NULL;
pthread_cond_broadcast( &self->put_cond );
pthread_mutex_unlock( &self->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 );
// Pass along the interpolation and deinterlace options
// TODO: get rid of consumer_deinterlace and use profile.progressive
mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale" ) );
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" ) );
mlt_properties_set_int( frame_properties, "consumer_tff", mlt_properties_get_int( properties, "top_field_first" ) );
}
// 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 self = arg;
// Get the properties of the consumer
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
// 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;
const char *format = mlt_properties_get( properties, "mlt_audio_format" );
if ( format )
{
if ( !strcmp( format, "none" ) )
afmt = mlt_audio_none;
else if ( !strcmp( format, "s32" ) )
afmt = mlt_audio_s32;
else if ( !strcmp( format, "s32le" ) )
afmt = mlt_audio_s32le;
else if ( !strcmp( format, "float" ) )
afmt = mlt_audio_float;
else if ( !strcmp( format, "f32le" ) )
afmt = mlt_audio_f32le;
}
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 = 0;
int skipped = 0;
int64_t time_process = 0;
int skip_next = 0;
mlt_position pos = 0;
mlt_position start_pos = 0;
mlt_position last_pos = 0;
int frame_duration = mlt_properties_get_int( properties, "frame_duration" );
int drop_max = mlt_properties_get_int( properties, "drop_max" );
if ( preview_off && preview_format != 0 )
self->format = preview_format;
// Get the first frame
frame = mlt_consumer_get_frame( self );
if ( frame )
{
// Get the image of the first frame
if ( !video_off )
{
mlt_events_fire( MLT_CONSUMER_PROPERTIES( self ), "consumer-frame-render", frame, NULL );
mlt_frame_get_image( frame, &image, &self->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 );
last_pos = start_pos = pos = mlt_frame_get_position( frame );
}
// Get the starting time (can ignore the times above)
gettimeofday( &ante, NULL );
// Continue to read ahead
while ( self->ahead )
{
// Put the current frame into the queue
pthread_mutex_lock( &self->queue_mutex );
while( self->ahead && mlt_deque_count( self->queue ) >= buffer )
pthread_cond_wait( &self->queue_cond, &self->queue_mutex );
mlt_deque_push_back( self->queue, frame );
pthread_cond_broadcast( &self->queue_cond );
pthread_mutex_unlock( &self->queue_mutex );
// Get the next frame
frame = mlt_consumer_get_frame( self );
// If there's no frame, we're probably stopped...
if ( frame == NULL )
continue;
pos = mlt_frame_get_position( frame );
// Increment the counter used for averaging processing cost
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
// Indicate seeking or trick-play
start_pos = pos;
}
// If skip flag not set or frame-dropping disabled
if ( !skip_next || self->real_time == -1 )
{
if ( !video_off )
{
// Reset width/height - could have been changed by previous mlt_frame_get_image
width = mlt_properties_get_int( properties, "width" );
height = mlt_properties_get_int( properties, "height" );
// Get the image
mlt_events_fire( MLT_CONSUMER_PROPERTIES( self ), "consumer-frame-render", frame, NULL );
mlt_frame_get_image( frame, &image, &self->format, &width, &height, 0 );
}
// Indicate the rendered image is available.
mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
// Reset consecutively-skipped counter
skipped = 0;
}
else // Skip image processing
{
// Increment the number of consecutively-skipped frames
skipped++;
// If too many (1 sec) consecutively-skipped frames
if ( skipped > drop_max )
{
// Reset cost tracker
time_process = 0;
count = 1;
mlt_log_verbose( self, "too many frames dropped - forcing next frame\n" );
}
}
// Always process audio
if ( !audio_off )
{
samples = mlt_sample_calculator( fps, frequency, counter++ );
mlt_frame_get_audio( frame, &audio, &afmt, &frequency, &channels, &samples );
}
// Get the time to process this frame
int64_t time_current = time_difference( &ante );
// If the current time is not suddenly some large amount
if ( time_current < time_process / count * 20 || !time_process || count < 5 )
{
// Accumulate the cost for processing this frame
time_process += time_current;
}
else
{
mlt_log_debug( self, "current %"PRId64" threshold %"PRId64" count %d\n",
time_current, (int64_t) (time_process / count * 20), count );
// Ignore the cost of this frame's time
count--;
}
// Determine if we started, resumed, or seeked
if ( pos != last_pos + 1 )
start_pos = pos;
last_pos = pos;
// Do not skip the first 20% of buffer at start, resume, or seek
if ( pos - start_pos <= buffer / 5 + 1 )
{
// Reset cost tracker
time_process = 0;
count = 1;
}
// Reset skip flag
skip_next = 0;
// Only consider skipping if the buffer level is low (or really small)
if ( mlt_deque_count( self->queue ) <= buffer / 5 + 1 )
{
// Skip next frame if average cost exceeds frame duration.
if ( time_process / count > frame_duration )
skip_next = 1;
if ( skip_next )
mlt_log_debug( self, "avg usec %"PRId64" (%"PRId64"/%d) duration %d\n",
time_process/count, time_process, count, frame_duration);
}
}
// 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 self a consumer
* \return an index into the queue
*/
static inline int first_unprocessed_frame( mlt_consumer self )
{
int index = self->real_time <= 0 ? 0 : self->process_head;
while ( index < mlt_deque_count( self->queue ) && MLT_FRAME( mlt_deque_peek( self->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 self = arg;
// Get the properties of the consumer
mlt_properties properties = MLT_CONSUMER_PROPERTIES( self );
// 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 = self->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 ( self->ahead )
{
// Get the next unprocessed frame from the work queue
pthread_mutex_lock( &self->queue_mutex );
int index = first_unprocessed_frame( self );
while ( self->ahead && index >= mlt_deque_count( self->queue ) )
{
mlt_log_debug( MLT_CONSUMER_SERVICE(self), "waiting in worker index = %d queue count = %d\n",
index, mlt_deque_count( self->queue ) );
pthread_cond_wait( &self->queue_cond, &self->queue_mutex );
index = first_unprocessed_frame( self );
}
// Mark the frame for processing
frame = mlt_deque_peek( self->queue, index );
if ( frame )
{
mlt_log_debug( MLT_CONSUMER_SERVICE(self), "worker processing index = %d frame %d queue count = %d\n",
index, mlt_frame_get_position(frame), mlt_deque_count( self->queue ) );
frame->is_processing = 1;
mlt_properties_inc_ref( MLT_FRAME_PROPERTIES( frame ) );
}
pthread_mutex_unlock( &self->queue_mutex );
// 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( self ), "consumer-frame-render", frame, NULL );
mlt_frame_get_image( frame, &image, &format, &width, &height, 0 );
}
mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 1 );
mlt_frame_close( frame );
// Tell a waiting thread (non-realtime main consumer thread) that we are done.
pthread_mutex_lock( &self->done_mutex );
pthread_cond_broadcast( &self->done_cond );
pthread_mutex_unlock( &self->done_mutex );
}
return NULL;
}
/** Start the read/render thread.
*
* \private \memberof mlt_consumer_s
* \param self a consumer
*/
static void consumer_read_ahead_start( mlt_consumer self )
{
// We're running now
self->ahead = 1;
// Create the frame queue
self->queue = mlt_deque_init( );
// Create the queue mutex
pthread_mutex_init( &self->queue_mutex, NULL );
// Create the condition
pthread_cond_init( &self->queue_cond, NULL );
// Create the read ahead
if ( mlt_properties_get( MLT_CONSUMER_PROPERTIES( self ), "priority" ) )
{
struct sched_param priority;
priority.sched_priority = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( self ), "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( &self->ahead_thread, &thread_attributes, consumer_read_ahead_thread, self ) < 0 )