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281 lines
8.4 KiB
281 lines
8.4 KiB
/*
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* producer_framebuffer.c -- create subspeed frames
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* Copyright (C) 2007 Jean-Baptiste Mardelle <jb@ader.ch>
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* Author: Jean-Baptiste Mardelle, based on the code of motion_est by Zachary Drew
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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 "producer_framebuffer.h"
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#include <framework/mlt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <string.h>
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#include <sys/time.h>
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#include <assert.h>
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// Forward references.
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static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index );
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/** Image stack(able) method
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*/
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static int framebuffer_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
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{
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// Get the filter object and properties
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mlt_producer producer = mlt_frame_pop_service( this );
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mlt_frame first_frame = mlt_frame_pop_service( this );
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mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
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// Frame properties objects
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mlt_properties frame_properties = MLT_FRAME_PROPERTIES( this );
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mlt_properties first_frame_properties = MLT_FRAME_PROPERTIES( first_frame );
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*width = mlt_properties_get_int( frame_properties, "width" );
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*height = mlt_properties_get_int( frame_properties, "height" );
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int size;
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switch ( *format )
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{
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case mlt_image_yuv420p:
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size = *width * 3 * ( *height + 1 ) / 2;
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break;
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case mlt_image_rgb24:
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size = *width * ( *height + 1 ) * 3;
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break;
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default:
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*format = mlt_image_yuv422;
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size = *width * ( *height + 1 ) * 2;
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break;
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}
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uint8_t *output = mlt_properties_get_data( producer_properties, "output_buffer", NULL );
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if( output == NULL )
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{
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output = mlt_pool_alloc( size );
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// Let someone else clean up
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mlt_properties_set_data( producer_properties, "output_buffer", output, size, mlt_pool_release, NULL );
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}
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uint8_t *first_image = mlt_properties_get_data( first_frame_properties, "image", NULL );
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// which frames are buffered?
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int error = 0;
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if( first_image == NULL )
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{
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error = mlt_frame_get_image( first_frame, &first_image, format, width, height, writable );
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if( error != 0 ) {
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fprintf(stderr, "first_image == NULL get image died\n");
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return error;
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}
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}
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// Start with a base image
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memcpy( output, first_image, size );
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*image = output;
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mlt_properties_set_data( frame_properties, "image", output, size, NULL, NULL );
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// Make sure that no further scaling is done
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mlt_properties_set( frame_properties, "rescale.interps", "none" );
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mlt_properties_set( frame_properties, "scale", "off" );
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mlt_frame_close( first_frame );
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return 0;
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}
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static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index )
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{
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// Construct a new frame
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*frame = mlt_frame_init( );
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mlt_properties properties = MLT_PRODUCER_PROPERTIES(this);
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if( frame != NULL )
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{
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mlt_frame first_frame = mlt_properties_get_data( properties, "first_frame", NULL );
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mlt_position first_position = (first_frame != NULL) ? mlt_frame_get_position( first_frame ) : -1;
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// Get the real producer
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mlt_producer real_producer = mlt_properties_get_data( properties, "producer", NULL );
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// get properties
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int strobe = mlt_properties_get_int( properties, "strobe");
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int freeze = mlt_properties_get_int( properties, "freeze");
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int freeze_after = mlt_properties_get_int( properties, "freeze_after");
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int freeze_before = mlt_properties_get_int( properties, "freeze_before");
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mlt_position need_first;
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if (!freeze || freeze_after || freeze_before) {
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double prod_speed = mlt_properties_get_double( properties, "_speed");
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double actual_position = prod_speed * (double) mlt_producer_position( this );
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if (mlt_properties_get_int( properties, "reverse")) actual_position = mlt_producer_get_playtime(this) - actual_position;
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if (strobe < 2)
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{
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need_first = floor( actual_position );
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}
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else
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{
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// Strobe effect wanted, calculate frame position
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need_first = floor( actual_position );
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need_first -= need_first%strobe;
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}
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if (freeze)
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{
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if (freeze_after && need_first > freeze) need_first = freeze;
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else if (freeze_before && need_first < freeze) need_first = freeze;
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}
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}
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else need_first = freeze;
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if( need_first != first_position )
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{
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mlt_frame_close( first_frame );
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first_position = -1;
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first_frame = NULL;
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}
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if( first_frame == NULL )
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{
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// Seek the producer to the correct place
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mlt_producer_seek( real_producer, need_first );
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// Get the frame
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mlt_service_get_frame( MLT_PRODUCER_SERVICE( real_producer ), &first_frame, index );
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double ratio = mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( real_producer ), "aspect_ratio" ) * (double) mlt_properties_get_int( MLT_FRAME_PROPERTIES( first_frame ), "width" ) / (double) mlt_properties_get_int( MLT_FRAME_PROPERTIES( first_frame ), "height" ) / ( (double) mlt_properties_get_int(MLT_FRAME_PROPERTIES( *frame ), "width" ) / (double) mlt_properties_get_int( MLT_FRAME_PROPERTIES( *frame ), "height" ));
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mlt_properties_set_double( properties, "ratio_fix", ratio );
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}
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// Make sure things are in their place
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mlt_properties_set_data( properties, "first_frame", first_frame, 0, NULL, NULL );
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// Stack the producer and producer's get image
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mlt_frame_push_service( *frame, first_frame );
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mlt_properties_inc_ref( MLT_FRAME_PROPERTIES( first_frame ) );
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mlt_frame_push_service( *frame, this );
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mlt_frame_push_service( *frame, framebuffer_get_image );
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// Give the returned frame temporal identity
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mlt_frame_set_position( *frame, mlt_producer_position( this ) );
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mlt_properties_set_double( MLT_FRAME_PROPERTIES(*frame), "aspect_ratio", mlt_properties_get_double( properties, "ratio_fix" ));
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}
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return 0;
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}
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mlt_producer producer_framebuffer_init( char *arg )
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{
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mlt_producer this = NULL;
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this = calloc( 1, sizeof( struct mlt_producer_s ) );
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mlt_producer_init( this, NULL );
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// Wrap fezzik
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mlt_producer real_producer;
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// Check if a speed was specified.
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/**
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* Speed must be appended to the filename with ':'. To play your video at 50%:
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inigo framebuffer:my_video.mpg:0.5
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* Stroboscope effect can be obtained by adding a stobe=x parameter, where
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x is the number of frames that will be ignored.
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* You can play the movie backwards by adding reverse=1
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* You can freeze the clip at a determined position by adding freeze=frame_pos
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add freeze_after=1 to freeze only paste position or freeze_before to freeze before it
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**/
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double speed;
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int count;
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char *props = strdup( arg );
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char *ptr = props;
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count = strcspn( ptr, ":" );
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ptr[count] = '\0';
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real_producer = mlt_factory_producer( "fezzik", props );
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ptr += count + 1;
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ptr += strspn( ptr, ":" );
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count = strcspn( ptr, ":" );
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ptr[count] = '\0';
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speed = atof(ptr);
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free( props );
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if (speed == 0.0) speed = 1.0;
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if ( this != NULL && real_producer != NULL)
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{
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// Get the properties of this producer
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
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// Fezzik normalised it for us already
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mlt_properties_set_int( properties, "fezzik_normalised", 1);
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// Store the producer and fitler
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mlt_properties_set_data( properties, "producer", real_producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
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// Grab some stuff from the real_producer
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mlt_properties_pass_list( properties, MLT_PRODUCER_PROPERTIES( real_producer ), "length,resource,width,height" );
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if ( speed != 1.0 )
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{
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double real_length = (double) mlt_producer_get_length( real_producer );
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mlt_properties_set_position( properties, "length", real_length / speed );
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}
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// Since we control the seeking, prevent it from seeking on its own
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mlt_producer_set_speed( real_producer, 0 );
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mlt_producer_set_speed( this, speed );
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// Override the get_frame method
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this->get_frame = producer_get_frame;
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}
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else
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{
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if ( this )
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mlt_producer_close( this );
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if ( real_producer )
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mlt_producer_close( real_producer );
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this = NULL;
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}
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return this;
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}
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