+++ /dev/null
-/**
- * \file mlt_tractor.c
- * \brief tractor service class
- * \see mlt_tractor_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
- * 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_tractor.h"
-#include "mlt_frame.h"
-#include "mlt_multitrack.h"
-#include "mlt_field.h"
-#include "mlt_log.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-
-/* Forward references to static methods.
-*/
-
-static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int track );
-static void mlt_tractor_listener( mlt_multitrack tracks, mlt_tractor this );
-
-/** Construct a tractor without a field or multitrack.
- *
- * Sets the resource property to "<tractor>", the mlt_type to "mlt_producer",
- * and mlt_service to "tractor".
- *
- * \public \memberof mlt_tractor_s
- * \return the new tractor
- */
-
-mlt_tractor mlt_tractor_init( )
-{
- mlt_tractor this = calloc( sizeof( struct mlt_tractor_s ), 1 );
- if ( this != NULL )
- {
- mlt_producer producer = &this->parent;
- if ( mlt_producer_init( producer, this ) == 0 )
- {
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
-
- mlt_properties_set( properties, "resource", "<tractor>" );
- mlt_properties_set( properties, "mlt_type", "mlt_producer" );
- mlt_properties_set( properties, "mlt_service", "tractor" );
- mlt_properties_set_int( properties, "in", 0 );
- mlt_properties_set_int( properties, "out", -1 );
- mlt_properties_set_int( properties, "length", 0 );
-
- producer->get_frame = producer_get_frame;
- producer->close = ( mlt_destructor )mlt_tractor_close;
- producer->close_object = this;
- }
- else
- {
- free( this );
- this = NULL;
- }
- }
- return this;
-}
-
-/** Construct a tractor as well as a field and multitrack.
- *
- * Sets the resource property to "<tractor>", the mlt_type to "mlt_producer",
- * and mlt_service to "tractor".
- *
- * \public \memberof mlt_tractor_s
- * \return the new tractor
- */
-
-mlt_tractor mlt_tractor_new( )
-{
- mlt_tractor this = calloc( sizeof( struct mlt_tractor_s ), 1 );
- if ( this != NULL )
- {
- mlt_producer producer = &this->parent;
- if ( mlt_producer_init( producer, this ) == 0 )
- {
- mlt_multitrack multitrack = mlt_multitrack_init( );
- mlt_field field = mlt_field_new( multitrack, this );
- mlt_properties props = MLT_PRODUCER_PROPERTIES( producer );
-
- mlt_properties_set( props, "resource", "<tractor>" );
- mlt_properties_set( props, "mlt_type", "mlt_producer" );
- mlt_properties_set( props, "mlt_service", "tractor" );
- mlt_properties_set_position( props, "in", 0 );
- mlt_properties_set_position( props, "out", 0 );
- mlt_properties_set_position( props, "length", 0 );
- mlt_properties_set_data( props, "multitrack", multitrack, 0, ( mlt_destructor )mlt_multitrack_close, NULL );
- mlt_properties_set_data( props, "field", field, 0, ( mlt_destructor )mlt_field_close, NULL );
-
- mlt_events_listen( MLT_MULTITRACK_PROPERTIES( multitrack ), this, "producer-changed", ( mlt_listener )mlt_tractor_listener );
-
- producer->get_frame = producer_get_frame;
- producer->close = ( mlt_destructor )mlt_tractor_close;
- producer->close_object = this;
- }
- else
- {
- free( this );
- this = NULL;
- }
- }
- return this;
-}
-
-/** Get the service object associated to the tractor.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- * \return the parent service object
- * \see MLT_TRACTOR_SERVICE
- */
-
-mlt_service mlt_tractor_service( mlt_tractor this )
-{
- return MLT_PRODUCER_SERVICE( &this->parent );
-}
-
-/** Get the producer object associated to the tractor.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- * \return the parent producer object
- * \see MLT_TRACTOR_PRODUCER
- */
-
-mlt_producer mlt_tractor_producer( mlt_tractor this )
-{
- return this != NULL ? &this->parent : NULL;
-}
-
-/** Get the properties object associated to the tractor.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- * \return the tractor's property list
- * \see MLT_TRACTOR_PROPERTIES
- */
-
-mlt_properties mlt_tractor_properties( mlt_tractor this )
-{
- return MLT_PRODUCER_PROPERTIES( &this->parent );
-}
-
-/** Get the field this tractor is harvesting.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- * \return a field or NULL if there is no field for this tractor
- */
-
-mlt_field mlt_tractor_field( mlt_tractor this )
-{
- return mlt_properties_get_data( MLT_TRACTOR_PROPERTIES( this ), "field", NULL );
-}
-
-/** Get the multitrack this tractor is pulling.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- * \return a multitrack or NULL if there is none
- */
-
-mlt_multitrack mlt_tractor_multitrack( mlt_tractor this )
-{
- return mlt_properties_get_data( MLT_TRACTOR_PROPERTIES( this ), "multitrack", NULL );
-}
-
-/** Ensure the tractors in/out points match the multitrack.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- */
-
-void mlt_tractor_refresh( mlt_tractor this )
-{
- mlt_multitrack multitrack = mlt_tractor_multitrack( this );
- mlt_properties properties = MLT_MULTITRACK_PROPERTIES( multitrack );
- mlt_properties self = MLT_TRACTOR_PROPERTIES( this );
- mlt_events_block( properties, self );
- mlt_events_block( self, self );
- mlt_multitrack_refresh( multitrack );
- mlt_properties_set_position( self, "in", 0 );
- mlt_properties_set_position( self, "out", mlt_properties_get_position( properties, "out" ) );
- mlt_events_unblock( self, self );
- mlt_events_unblock( properties, self );
- mlt_properties_set_position( self, "length", mlt_properties_get_position( properties, "length" ) );
-}
-
-static void mlt_tractor_listener( mlt_multitrack tracks, mlt_tractor this )
-{
- mlt_tractor_refresh( this );
-}
-
-/** Connect the tractor.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- * \param producer a producer
- * \return true on error
- */
-
-int mlt_tractor_connect( mlt_tractor this, mlt_service producer )
-{
- int ret = mlt_service_connect_producer( MLT_TRACTOR_SERVICE( this ), producer, 0 );
-
- // This is the producer we're going to connect to
- if ( ret == 0 )
- this->producer = producer;
-
- return ret;
-}
-
-/** Set the producer for a specific track.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- * \param producer a producer
- * \param index the 0-based track index
- * \return true on error
- */
-
-int mlt_tractor_set_track( mlt_tractor this, mlt_producer producer, int index )
-{
- return mlt_multitrack_connect( mlt_tractor_multitrack( this ), producer, index );
-}
-
-/** Get the producer for a specific track.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- * \param index the 0-based track index
- * \return the producer for track \p index
- */
-
-mlt_producer mlt_tractor_get_track( mlt_tractor this, int index )
-{
- return mlt_multitrack_track( mlt_tractor_multitrack( this ), index );
-}
-
-static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
-{
- uint8_t *data = NULL;
- mlt_properties properties = MLT_FRAME_PROPERTIES( this );
- mlt_frame frame = mlt_frame_pop_service( this );
- mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
- mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale.interp" ) );
- mlt_properties_set_int( frame_properties, "resize_alpha", mlt_properties_get_int( properties, "resize_alpha" ) );
- mlt_properties_set_int( frame_properties, "distort", mlt_properties_get_int( properties, "distort" ) );
- mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "consumer_aspect_ratio" ) );
- mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "consumer_deinterlace" ) );
- mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
- mlt_properties_set_int( frame_properties, "normalised_width", mlt_properties_get_int( properties, "normalised_width" ) );
- mlt_properties_set_int( frame_properties, "normalised_height", mlt_properties_get_int( properties, "normalised_height" ) );
- mlt_frame_get_image( frame, buffer, format, width, height, writable );
- mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
- mlt_properties_set_int( properties, "width", *width );
- mlt_properties_set_int( properties, "height", *height );
- mlt_properties_set_int( properties, "format", *format );
- mlt_properties_set_double( properties, "aspect_ratio", mlt_frame_get_aspect_ratio( frame ) );
- mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( frame_properties, "progressive" ) );
- mlt_properties_set_int( properties, "distort", mlt_properties_get_int( frame_properties, "distort" ) );
- data = mlt_frame_get_alpha_mask( frame );
- mlt_properties_set_data( properties, "alpha", data, 0, NULL, NULL );
- return 0;
-}
-
-static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
-{
- mlt_properties properties = MLT_FRAME_PROPERTIES( this );
- mlt_frame frame = mlt_frame_pop_audio( this );
- mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples );
- mlt_properties_set_data( properties, "audio", *buffer, 0, NULL, NULL );
- mlt_properties_set_int( properties, "frequency", *frequency );
- mlt_properties_set_int( properties, "channels", *channels );
- return 0;
-}
-
-static void destroy_data_queue( void *arg )
-{
- if ( arg != NULL )
- {
- // Assign the correct type
- mlt_deque queue = arg;
-
- // Iterate through each item and destroy them
- while ( mlt_deque_peek_front( queue ) != NULL )
- mlt_properties_close( mlt_deque_pop_back( queue ) );
-
- // Close the deque
- mlt_deque_close( queue );
- }
-}
-
-/** Get the next frame.
- *
- * \private \memberof mlt_tractor_s
- * \param parent the producer interface to the tractor
- * \param[out] frame a frame by reference
- * \param track the 0-based track index
- * \return true on error
- */
-
-static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int track )
-{
- mlt_tractor this = parent->child;
-
- // We only respond to the first track requests
- if ( track == 0 && this->producer != NULL )
- {
- int i = 0;
- int done = 0;
- mlt_frame temp = NULL;
- int count = 0;
- int image_count = 0;
-
- // Get the properties of the parent producer
- mlt_properties properties = MLT_PRODUCER_PROPERTIES( parent );
-
- // Try to obtain the multitrack associated to the tractor
- mlt_multitrack multitrack = mlt_properties_get_data( properties, "multitrack", NULL );
-
- // Or a specific producer
- mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
-
- // The output frame will hold the 'global' data feeds (ie: those which are targetted for the final frame)
- mlt_deque data_queue = mlt_deque_init( );
-
- // Determine whether this tractor feeds to the consumer or stops here
- int global_feed = mlt_properties_get_int( properties, "global_feed" );
-
- // If we don't have one, we're in trouble...
- if ( multitrack != NULL )
- {
- // Used to garbage collect all frames
- char label[ 30 ];
-
- // Get the id of the tractor
- char *id = mlt_properties_get( properties, "_unique_id" );
-
- // Will be used to store the frame properties object
- mlt_properties frame_properties = NULL;
-
- // We'll store audio and video frames to use here
- mlt_frame audio = NULL;
- mlt_frame video = NULL;
- mlt_frame first_video = NULL;
-
- // Temporary properties
- mlt_properties temp_properties = NULL;
-
- // Get the multitrack's producer
- mlt_producer target = MLT_MULTITRACK_PRODUCER( multitrack );
- mlt_producer_seek( target, mlt_producer_frame( parent ) );
- mlt_producer_set_speed( target, mlt_producer_get_speed( parent ) );
-
- // We will create one frame and attach everything to it
- *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( parent ) );
-
- // Get the properties of the frame
- frame_properties = MLT_FRAME_PROPERTIES( *frame );
-
- // Loop through each of the tracks we're harvesting
- for ( i = 0; !done; i ++ )
- {
- // Get a frame from the producer
- mlt_service_get_frame( this->producer, &temp, i );
-
- // Get the temporary properties
- temp_properties = MLT_FRAME_PROPERTIES( temp );
-
- // Check for last track
- done = mlt_properties_get_int( temp_properties, "last_track" );
-
- // Handle fx only tracks
- if ( mlt_properties_get_int( temp_properties, "fx_cut" ) )
- {
- int hide = ( video == NULL ? 1 : 0 ) | ( audio == NULL ? 2 : 0 );
- mlt_properties_set_int( temp_properties, "hide", hide );
- }
-
- // We store all frames with a destructor on the output frame
- sprintf( label, "_%s_%d", id, count ++ );
- mlt_properties_set_data( frame_properties, label, temp, 0, ( mlt_destructor )mlt_frame_close, NULL );
-
- // We want to append all 'final' feeds to the global queue
- if ( !done && mlt_properties_get_data( temp_properties, "data_queue", NULL ) != NULL )
- {
- // Move the contents of this queue on to the output frames data queue
- mlt_deque sub_queue = mlt_properties_get_data( MLT_FRAME_PROPERTIES( temp ), "data_queue", NULL );
- mlt_deque temp = mlt_deque_init( );
- while ( global_feed && mlt_deque_count( sub_queue ) )
- {
- mlt_properties p = mlt_deque_pop_back( sub_queue );
- if ( mlt_properties_get_int( p, "final" ) )
- mlt_deque_push_back( data_queue, p );
- else
- mlt_deque_push_back( temp, p );
- }
- while( mlt_deque_count( temp ) )
- mlt_deque_push_front( sub_queue, mlt_deque_pop_back( temp ) );
- mlt_deque_close( temp );
- }
-
- // Now do the same with the global queue but without the conditional behaviour
- if ( mlt_properties_get_data( temp_properties, "global_queue", NULL ) != NULL )
- {
- mlt_deque sub_queue = mlt_properties_get_data( MLT_FRAME_PROPERTIES( temp ), "global_queue", NULL );
- while ( mlt_deque_count( sub_queue ) )
- {
- mlt_properties p = mlt_deque_pop_back( sub_queue );
- mlt_deque_push_back( data_queue, p );
- }
- }
-
- // Pick up first video and audio frames
- if ( !done && !mlt_frame_is_test_audio( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 2 ) )
- {
- // Order of frame creation is starting to get problematic
- if ( audio != NULL )
- {
- mlt_deque_push_front( MLT_FRAME_AUDIO_STACK( temp ), producer_get_audio );
- mlt_deque_push_front( MLT_FRAME_AUDIO_STACK( temp ), audio );
- }
- audio = temp;
- }
- if ( !done && !mlt_frame_is_test_card( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 1 ) )
- {
- if ( video != NULL )
- {
- mlt_deque_push_front( MLT_FRAME_IMAGE_STACK( temp ), producer_get_image );
- mlt_deque_push_front( MLT_FRAME_IMAGE_STACK( temp ), video );
- }
- video = temp;
- if ( first_video == NULL )
- first_video = temp;
-
- // Ensure that all frames know the aspect ratio of the background
- mlt_properties_set_double( temp_properties, "output_ratio",
- mlt_properties_get_double( MLT_FRAME_PROPERTIES( first_video ), "aspect_ratio" ) );
-
- mlt_properties_set_int( MLT_FRAME_PROPERTIES( temp ), "image_count", ++ image_count );
- image_count = 1;
- }
- }
-
- // Now stack callbacks
- if ( audio != NULL )
- {
- mlt_frame_push_audio( *frame, audio );
- mlt_frame_push_audio( *frame, producer_get_audio );
- }
-
- if ( video != NULL )
- {
- mlt_properties video_properties = MLT_FRAME_PROPERTIES( first_video );
- mlt_frame_push_service( *frame, video );
- mlt_frame_push_service( *frame, producer_get_image );
- if ( global_feed )
- mlt_properties_set_data( frame_properties, "data_queue", data_queue, 0, NULL, NULL );
- mlt_properties_set_data( video_properties, "global_queue", data_queue, 0, destroy_data_queue, NULL );
- mlt_properties_set_int( frame_properties, "width", mlt_properties_get_int( video_properties, "width" ) );
- mlt_properties_set_int( frame_properties, "height", mlt_properties_get_int( video_properties, "height" ) );
- mlt_properties_set_int( frame_properties, "real_width", mlt_properties_get_int( video_properties, "real_width" ) );
- mlt_properties_set_int( frame_properties, "real_height", mlt_properties_get_int( video_properties, "real_height" ) );
- mlt_properties_set_int( frame_properties, "progressive", mlt_properties_get_int( video_properties, "progressive" ) );
- mlt_properties_set_double( frame_properties, "aspect_ratio", mlt_properties_get_double( video_properties, "aspect_ratio" ) );
- mlt_properties_set_int( frame_properties, "image_count", image_count );
- }
- else
- {
- destroy_data_queue( data_queue );
- }
-
- mlt_frame_set_position( *frame, mlt_producer_frame( parent ) );
- mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_audio", audio == NULL );
- mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_image", video == NULL );
- mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame ), "consumer_lock_service", this, 0, NULL, NULL );
- }
- else if ( producer != NULL )
- {
- mlt_producer_seek( producer, mlt_producer_frame( parent ) );
- mlt_producer_set_speed( producer, mlt_producer_get_speed( parent ) );
- mlt_service_get_frame( this->producer, frame, track );
- }
- else
- {
- mlt_log( MLT_PRODUCER_SERVICE( parent ), MLT_LOG_ERROR, "tractor without a multitrack!!\n" );
- mlt_service_get_frame( this->producer, frame, track );
- }
-
- // Prepare the next frame
- mlt_producer_prepare_next( parent );
-
- // Indicate our found status
- return 0;
- }
- else
- {
- // Generate a test card
- *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( parent ) );
- return 0;
- }
-}
-
-/** Close the tractor and free its resources.
- *
- * \public \memberof mlt_tractor_s
- * \param this a tractor
- */
-
-void mlt_tractor_close( mlt_tractor this )
-{
- if ( this != NULL && mlt_properties_dec_ref( MLT_TRACTOR_PROPERTIES( this ) ) <= 0 )
- {
- this->parent.close = NULL;
- mlt_producer_close( &this->parent );
- free( this );
- }
-}
-
projects / melted / blobdiff