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475 lines
16 KiB
475 lines
16 KiB
/*
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* mlt_tractor.c -- tractor service class
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* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
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* Author: Charles Yates <charles.yates@pandora.be>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "mlt_tractor.h"
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#include "mlt_frame.h"
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#include "mlt_multitrack.h"
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#include "mlt_field.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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/** Forward references to static methods.
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*/
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static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int track );
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static void mlt_tractor_listener( mlt_multitrack tracks, mlt_tractor this );
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/** Constructor for the tractor.
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*/
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mlt_tractor mlt_tractor_init( )
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{
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mlt_tractor this = calloc( sizeof( struct mlt_tractor_s ), 1 );
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if ( this != NULL )
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{
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mlt_producer producer = &this->parent;
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if ( mlt_producer_init( producer, this ) == 0 )
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{
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
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mlt_properties_set( properties, "resource", "<tractor>" );
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mlt_properties_set( properties, "mlt_type", "mlt_producer" );
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mlt_properties_set( properties, "mlt_service", "tractor" );
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mlt_properties_set_int( properties, "in", 0 );
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mlt_properties_set_int( properties, "out", -1 );
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mlt_properties_set_int( properties, "length", 0 );
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producer->get_frame = producer_get_frame;
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producer->close = ( mlt_destructor )mlt_tractor_close;
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producer->close_object = this;
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}
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else
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{
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free( this );
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this = NULL;
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}
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}
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return this;
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}
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mlt_tractor mlt_tractor_new( )
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{
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mlt_tractor this = calloc( sizeof( struct mlt_tractor_s ), 1 );
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if ( this != NULL )
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{
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mlt_producer producer = &this->parent;
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if ( mlt_producer_init( producer, this ) == 0 )
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{
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mlt_multitrack multitrack = mlt_multitrack_init( );
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mlt_field field = mlt_field_new( multitrack, this );
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mlt_properties props = MLT_PRODUCER_PROPERTIES( producer );
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mlt_properties_set( props, "resource", "<tractor>" );
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mlt_properties_set( props, "mlt_type", "mlt_producer" );
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mlt_properties_set( props, "mlt_service", "tractor" );
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mlt_properties_set_position( props, "in", 0 );
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mlt_properties_set_position( props, "out", 0 );
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mlt_properties_set_position( props, "length", 0 );
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mlt_properties_set_data( props, "multitrack", multitrack, 0, ( mlt_destructor )mlt_multitrack_close, NULL );
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mlt_properties_set_data( props, "field", field, 0, ( mlt_destructor )mlt_field_close, NULL );
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mlt_events_listen( MLT_MULTITRACK_PROPERTIES( multitrack ), this, "producer-changed", ( mlt_listener )mlt_tractor_listener );
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producer->get_frame = producer_get_frame;
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producer->close = ( mlt_destructor )mlt_tractor_close;
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producer->close_object = this;
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}
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else
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{
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free( this );
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this = NULL;
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}
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}
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return this;
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}
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/** Get the service object associated to the tractor.
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*/
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mlt_service mlt_tractor_service( mlt_tractor this )
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{
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return MLT_PRODUCER_SERVICE( &this->parent );
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}
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/** Get the producer object associated to the tractor.
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*/
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mlt_producer mlt_tractor_producer( mlt_tractor this )
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{
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return this != NULL ? &this->parent : NULL;
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}
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/** Get the properties object associated to the tractor.
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*/
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mlt_properties mlt_tractor_properties( mlt_tractor this )
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{
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return MLT_PRODUCER_PROPERTIES( &this->parent );
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}
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/** Get the field this tractor is harvesting.
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*/
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mlt_field mlt_tractor_field( mlt_tractor this )
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{
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return mlt_properties_get_data( MLT_TRACTOR_PROPERTIES( this ), "field", NULL );
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}
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/** Get the multitrack this tractor is pulling.
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*/
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mlt_multitrack mlt_tractor_multitrack( mlt_tractor this )
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{
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return mlt_properties_get_data( MLT_TRACTOR_PROPERTIES( this ), "multitrack", NULL );
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}
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/** Ensure the tractors in/out points match the multitrack.
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*/
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void mlt_tractor_refresh( mlt_tractor this )
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{
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mlt_multitrack multitrack = mlt_tractor_multitrack( this );
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mlt_properties properties = MLT_MULTITRACK_PROPERTIES( multitrack );
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mlt_properties self = MLT_TRACTOR_PROPERTIES( this );
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mlt_events_block( properties, self );
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mlt_events_block( self, self );
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mlt_multitrack_refresh( multitrack );
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mlt_properties_set_position( self, "in", 0 );
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mlt_properties_set_position( self, "out", mlt_properties_get_position( properties, "out" ) );
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mlt_events_unblock( self, self );
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mlt_events_unblock( properties, self );
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mlt_properties_set_position( self, "length", mlt_properties_get_position( properties, "length" ) );
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}
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static void mlt_tractor_listener( mlt_multitrack tracks, mlt_tractor this )
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{
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mlt_tractor_refresh( this );
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}
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/** Connect the tractor.
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*/
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int mlt_tractor_connect( mlt_tractor this, mlt_service producer )
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{
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int ret = mlt_service_connect_producer( MLT_TRACTOR_SERVICE( this ), producer, 0 );
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// This is the producer we're going to connect to
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if ( ret == 0 )
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this->producer = producer;
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return ret;
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}
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/** Set the producer for a specific track.
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*/
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int mlt_tractor_set_track( mlt_tractor this, mlt_producer producer, int index )
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{
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return mlt_multitrack_connect( mlt_tractor_multitrack( this ), producer, index );
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}
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/** Get the producer for a specific track.
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*/
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mlt_producer mlt_tractor_get_track( mlt_tractor this, int index )
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{
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return mlt_multitrack_track( mlt_tractor_multitrack( this ), index );
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}
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static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
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{
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uint8_t *data = NULL;
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mlt_properties properties = MLT_FRAME_PROPERTIES( this );
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mlt_frame frame = mlt_frame_pop_service( this );
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mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
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mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale.interp" ) );
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mlt_properties_set_int( frame_properties, "resize_alpha", mlt_properties_get_int( properties, "resize_alpha" ) );
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mlt_properties_set_int( frame_properties, "distort", mlt_properties_get_int( properties, "distort" ) );
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mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "consumer_aspect_ratio" ) );
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mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_int( properties, "consumer_deinterlace" ) );
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mlt_properties_set( frame_properties, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
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mlt_properties_set_int( frame_properties, "normalised_width", mlt_properties_get_int( properties, "normalised_width" ) );
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mlt_properties_set_int( frame_properties, "normalised_height", mlt_properties_get_int( properties, "normalised_height" ) );
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mlt_frame_get_image( frame, buffer, format, width, height, writable );
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mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
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mlt_properties_set_int( properties, "width", *width );
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mlt_properties_set_int( properties, "height", *height );
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mlt_properties_set_int( properties, "format", *format );
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mlt_properties_set_double( properties, "aspect_ratio", mlt_frame_get_aspect_ratio( frame ) );
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mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( frame_properties, "progressive" ) );
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mlt_properties_set_int( properties, "distort", mlt_properties_get_int( frame_properties, "distort" ) );
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data = mlt_frame_get_alpha_mask( frame );
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mlt_properties_set_data( properties, "alpha", data, 0, NULL, NULL );
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return 0;
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}
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static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
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{
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mlt_properties properties = MLT_FRAME_PROPERTIES( this );
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mlt_frame frame = mlt_frame_pop_audio( this );
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mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples );
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mlt_properties_set_data( properties, "audio", *buffer, 0, NULL, NULL );
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mlt_properties_set_int( properties, "frequency", *frequency );
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mlt_properties_set_int( properties, "channels", *channels );
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return 0;
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}
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static void destroy_data_queue( void *arg )
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{
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if ( arg != NULL )
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{
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// Assign the correct type
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mlt_deque queue = arg;
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// Iterate through each item and destroy them
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while ( mlt_deque_peek_front( queue ) != NULL )
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mlt_properties_close( mlt_deque_pop_back( queue ) );
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// Close the deque
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mlt_deque_close( queue );
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}
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}
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/** Get the next frame.
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TODO: This function needs to be redesigned...
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*/
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static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int track )
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{
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mlt_tractor this = parent->child;
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// We only respond to the first track requests
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if ( track == 0 && this->producer != NULL )
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{
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int i = 0;
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int done = 0;
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mlt_frame temp = NULL;
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int count = 0;
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int image_count = 0;
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// Get the properties of the parent producer
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( parent );
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// Try to obtain the multitrack associated to the tractor
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mlt_multitrack multitrack = mlt_properties_get_data( properties, "multitrack", NULL );
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// Or a specific producer
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mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
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// The output frame will hold the 'global' data feeds (ie: those which are targetted for the final frame)
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mlt_deque data_queue = mlt_deque_init( );
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// Determine whether this tractor feeds to the consumer or stops here
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int global_feed = mlt_properties_get_int( properties, "global_feed" );
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// If we don't have one, we're in trouble...
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if ( multitrack != NULL )
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{
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// Used to garbage collect all frames
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char label[ 30 ];
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// Get the id of the tractor
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char *id = mlt_properties_get( properties, "_unique_id" );
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// Will be used to store the frame properties object
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mlt_properties frame_properties = NULL;
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// We'll store audio and video frames to use here
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mlt_frame audio = NULL;
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mlt_frame video = NULL;
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mlt_frame first_video = NULL;
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// Temporary properties
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mlt_properties temp_properties = NULL;
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// Get the multitrack's producer
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mlt_producer target = MLT_MULTITRACK_PRODUCER( multitrack );
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mlt_producer_seek( target, mlt_producer_frame( parent ) );
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mlt_producer_set_speed( target, mlt_producer_get_speed( parent ) );
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// We will create one frame and attach everything to it
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*frame = mlt_frame_init( );
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// Get the properties of the frame
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frame_properties = MLT_FRAME_PROPERTIES( *frame );
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// Loop through each of the tracks we're harvesting
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for ( i = 0; !done; i ++ )
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{
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// Get a frame from the producer
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mlt_service_get_frame( this->producer, &temp, i );
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// Get the temporary properties
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temp_properties = MLT_FRAME_PROPERTIES( temp );
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// Check for last track
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done = mlt_properties_get_int( temp_properties, "last_track" );
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// Handle fx only tracks
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if ( mlt_properties_get_int( temp_properties, "fx_cut" ) )
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{
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int hide = ( video == NULL ? 1 : 0 ) | ( audio == NULL ? 2 : 0 );
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mlt_properties_set_int( temp_properties, "hide", hide );
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}
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// We store all frames with a destructor on the output frame
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sprintf( label, "_%s_%d", id, count ++ );
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mlt_properties_set_data( frame_properties, label, temp, 0, ( mlt_destructor )mlt_frame_close, NULL );
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// We want to append all 'final' feeds to the global queue
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if ( !done && mlt_properties_get_data( temp_properties, "data_queue", NULL ) != NULL )
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{
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// Move the contents of this queue on to the output frames data queue
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mlt_deque sub_queue = mlt_properties_get_data( MLT_FRAME_PROPERTIES( temp ), "data_queue", NULL );
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mlt_deque temp = mlt_deque_init( );
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while ( global_feed && mlt_deque_count( sub_queue ) )
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{
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mlt_properties p = mlt_deque_pop_back( sub_queue );
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if ( mlt_properties_get_int( p, "final" ) )
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mlt_deque_push_back( data_queue, p );
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else
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mlt_deque_push_back( temp, p );
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}
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while( mlt_deque_count( temp ) )
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mlt_deque_push_front( sub_queue, mlt_deque_pop_back( temp ) );
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mlt_deque_close( temp );
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}
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// Now do the same with the global queue but without the conditional behaviour
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if ( mlt_properties_get_data( temp_properties, "global_queue", NULL ) != NULL )
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{
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mlt_deque sub_queue = mlt_properties_get_data( MLT_FRAME_PROPERTIES( temp ), "global_queue", NULL );
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while ( mlt_deque_count( sub_queue ) )
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{
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mlt_properties p = mlt_deque_pop_back( sub_queue );
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mlt_deque_push_back( data_queue, p );
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}
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}
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// Pick up first video and audio frames
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if ( !done && !mlt_frame_is_test_audio( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 2 ) )
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{
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// Order of frame creation is starting to get problematic
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if ( audio != NULL )
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{
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mlt_deque_push_front( MLT_FRAME_AUDIO_STACK( temp ), producer_get_audio );
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mlt_deque_push_front( MLT_FRAME_AUDIO_STACK( temp ), audio );
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}
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audio = temp;
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}
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if ( !done && !mlt_frame_is_test_card( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 1 ) )
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{
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if ( video != NULL )
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{
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mlt_deque_push_front( MLT_FRAME_IMAGE_STACK( temp ), producer_get_image );
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mlt_deque_push_front( MLT_FRAME_IMAGE_STACK( temp ), video );
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}
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video = temp;
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if ( first_video == NULL )
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first_video = temp;
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// Ensure that all frames know the aspect ratio of the background
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mlt_properties_set_double( temp_properties, "output_ratio",
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mlt_properties_get_double( MLT_FRAME_PROPERTIES( first_video ), "aspect_ratio" ) );
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mlt_properties_set_int( MLT_FRAME_PROPERTIES( temp ), "image_count", ++ image_count );
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image_count = 1;
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}
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}
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// Now stack callbacks
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if ( audio != NULL )
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{
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mlt_frame_push_audio( *frame, audio );
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mlt_frame_push_audio( *frame, producer_get_audio );
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}
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if ( video != NULL )
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{
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mlt_properties video_properties = MLT_FRAME_PROPERTIES( first_video );
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mlt_frame_push_service( *frame, video );
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mlt_frame_push_service( *frame, producer_get_image );
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if ( global_feed )
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mlt_properties_set_data( frame_properties, "data_queue", data_queue, 0, NULL, NULL );
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mlt_properties_set_data( video_properties, "global_queue", data_queue, 0, destroy_data_queue, NULL );
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mlt_properties_set_int( frame_properties, "width", mlt_properties_get_int( video_properties, "width" ) );
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mlt_properties_set_int( frame_properties, "height", mlt_properties_get_int( video_properties, "height" ) );
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mlt_properties_set_int( frame_properties, "real_width", mlt_properties_get_int( video_properties, "real_width" ) );
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mlt_properties_set_int( frame_properties, "real_height", mlt_properties_get_int( video_properties, "real_height" ) );
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mlt_properties_set_int( frame_properties, "progressive", mlt_properties_get_int( video_properties, "progressive" ) );
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mlt_properties_set_double( frame_properties, "aspect_ratio", mlt_properties_get_double( video_properties, "aspect_ratio" ) );
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mlt_properties_set_int( frame_properties, "image_count", image_count );
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}
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else
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{
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destroy_data_queue( data_queue );
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}
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mlt_frame_set_position( *frame, mlt_producer_frame( parent ) );
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mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_audio", audio == NULL );
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mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_image", video == NULL );
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mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame ), "consumer_lock_service", this, 0, NULL, NULL );
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}
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else if ( producer != NULL )
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{
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mlt_producer_seek( producer, mlt_producer_frame( parent ) );
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mlt_producer_set_speed( producer, mlt_producer_get_speed( parent ) );
|
|
mlt_service_get_frame( this->producer, frame, track );
|
|
}
|
|
else
|
|
{
|
|
fprintf( stderr, "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( );
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/** Close the 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 );
|
|
}
|
|
}
|
|
|