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146 lines
4.3 KiB
146 lines
4.3 KiB
/*
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* producer_kino.c -- a DV file format parser
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* Copyright (C) 2005 Ushodaya Enterprises Limited
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* Author: Charles Yates <charles.yates@pandora.be>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <stdlib.h>
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#include "producer_kino.h"
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#include <framework/mlt_frame.h>
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#include <framework/mlt_deque.h>
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#include <framework/mlt_factory.h>
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#include "kino_wrapper.h"
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/* NB: This is an abstract producer - it provides no codec support whatsoever. */
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#define FRAME_SIZE_525_60 10 * 150 * 80
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#define FRAME_SIZE_625_50 12 * 150 * 80
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typedef struct producer_kino_s *producer_kino;
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struct producer_kino_s
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{
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struct mlt_producer_s parent;
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kino_wrapper wrapper;
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};
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static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
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static void producer_close( mlt_producer parent );
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mlt_producer producer_kino_init( char *filename )
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{
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kino_wrapper wrapper = kino_wrapper_init( );
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if ( kino_wrapper_open( wrapper, filename ) )
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{
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producer_kino this = calloc( sizeof( struct producer_kino_s ), 1 );
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if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
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{
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mlt_producer producer = &this->parent;
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
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double fps = kino_wrapper_is_pal( wrapper ) ? 25 : 30000.0 / 1001.0;
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// Assign the wrapper
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this->wrapper = wrapper;
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// Pass wrapper properties (frame rate, count etc)
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mlt_properties_set_position( properties, "length", kino_wrapper_get_frame_count( wrapper ) );
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mlt_properties_set_position( properties, "in", 0 );
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mlt_properties_set_position( properties, "out", kino_wrapper_get_frame_count( wrapper ) - 1 );
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mlt_properties_set_double( properties, "real_fps", fps );
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mlt_properties_set( properties, "resource", filename );
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// Register transport implementation with the producer
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producer->close = ( mlt_destructor )producer_close;
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// Register our get_frame implementation with the producer
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producer->get_frame = producer_get_frame;
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// Return the producer
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return producer;
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}
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free( this );
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}
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kino_wrapper_close( wrapper );
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return NULL;
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}
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static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
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{
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producer_kino this = producer->child;
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uint8_t *data = mlt_pool_alloc( FRAME_SIZE_625_50 );
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// Obtain the current frame number
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uint64_t position = mlt_producer_frame( producer );
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// Create an empty frame
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*frame = mlt_frame_init( );
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// Seek and fetch
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if ( kino_wrapper_get_frame( this->wrapper, data, position ) )
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{
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// Get the frames properties
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mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
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// Determine if we're PAL or NTSC
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int is_pal = kino_wrapper_is_pal( this->wrapper );
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// Pass the dv data
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mlt_properties_set_data( properties, "dv_data", data, FRAME_SIZE_625_50, ( mlt_destructor )mlt_pool_release, NULL );
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// Update other info on the frame
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mlt_properties_set_int( properties, "width", 720 );
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mlt_properties_set_int( properties, "height", is_pal ? 576 : 480 );
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mlt_properties_set_int( properties, "top_field_first", is_pal ? 0 : ( data[ 5 ] & 0x07 ) == 0 ? 0 : 1 );
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}
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else
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{
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mlt_pool_release( data );
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}
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// Update timecode on the frame we're creating
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mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
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// Calculate the next timecode
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mlt_producer_prepare_next( producer );
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return 0;
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}
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static void producer_close( mlt_producer parent )
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{
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if ( parent != NULL )
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{
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// Obtain this
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producer_kino this = parent->child;
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// Close the file
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if ( this != NULL )
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kino_wrapper_close( this->wrapper );
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// Close the parent
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parent->close = NULL;
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mlt_producer_close( parent );
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// Free the memory
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free( this );
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}
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}
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