From: j-b-m Date: Sat, 18 Nov 2006 14:22:57 +0000 (+0000) Subject: New framebuffer producer. Provides slowmotion, reverse playing and stroboscope effect X-Git-Url: http://research.m1stereo.tv/gitweb?a=commitdiff_plain;h=0b6d1073cc02530ef10e8880c855b042b41d0bf3;p=melted New framebuffer producer. Provides slowmotion, reverse playing and stroboscope effect git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@938 d19143bc-622f-0410-bfdd-b5b2a6649095 --- diff --git a/src/modules/core/Makefile b/src/modules/core/Makefile index 86d0b44..9219824 100644 --- a/src/modules/core/Makefile +++ b/src/modules/core/Makefile @@ -4,6 +4,7 @@ TARGET = ../libmltcore$(LIBSUF) OBJS = factory.o \ producer_colour.o \ + producer_framebuffer.o \ producer_noise.o \ producer_ppm.o \ filter_brightness.o \ diff --git a/src/modules/core/configure b/src/modules/core/configure index 160844b..5262eb1 100755 --- a/src/modules/core/configure +++ b/src/modules/core/configure @@ -6,6 +6,7 @@ then cat << EOF >> ../producers.dat color libmltcore$LIBSUF colour libmltcore$LIBSUF +framebuffer libmltcore$LIBSUF noise libmltcore$LIBSUF ppm libmltcore$LIBSUF EOF diff --git a/src/modules/core/factory.c b/src/modules/core/factory.c index bd3b355..2d3f55a 100644 --- a/src/modules/core/factory.c +++ b/src/modules/core/factory.c @@ -49,6 +49,8 @@ void *mlt_create_producer( char *id, void *arg ) return producer_colour_init( arg ); if ( !strcmp( id, "colour" ) ) return producer_colour_init( arg ); + if ( !strcmp( id, "framebuffer" ) ) + return producer_framebuffer_init( arg ); if ( !strcmp( id, "noise" ) ) return producer_noise_init( arg ); if ( !strcmp( id, "ppm" ) ) diff --git a/src/modules/core/producer_framebuffer.c b/src/modules/core/producer_framebuffer.c new file mode 100644 index 0000000..b3cbf01 --- /dev/null +++ b/src/modules/core/producer_framebuffer.c @@ -0,0 +1,269 @@ +/* + * producer_framebuffer.c -- create subspeed frames + * Author: Jean-Baptiste Mardelle, based on the code of motion_est by Zachary Drew + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include "producer_framebuffer.h" +#include + +#include +#include +#include +#include +#include +#include + +// Image stack(able) method +static int framebuffer_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable ) +{ + + // Get the filter object and properties + mlt_producer producer = mlt_frame_pop_service( this ); + mlt_frame first_frame = mlt_frame_pop_service( this ); + + mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer ); + + + // Frame properties objects + mlt_properties frame_properties = MLT_FRAME_PROPERTIES( this ); + mlt_properties first_frame_properties = MLT_FRAME_PROPERTIES( first_frame ); + + // image stride + int size, xstride, ystride; + switch( *format ){ + case mlt_image_yuv422: + size = *width * *height * 2; + xstride = 2; + ystride = 2 * *width; + break; + default: + fprintf(stderr, "Unsupported image format\n"); + return -1; + } + + uint8_t *output = mlt_properties_get_data( producer_properties, "output_buffer", 0 ); + if( output == NULL ) + { + output = mlt_pool_alloc( size ); + + // Let someone else clean up + mlt_properties_set_data( producer_properties, "output_buffer", output, size, mlt_pool_release, NULL ); + } + + uint8_t *first_image = mlt_properties_get_data( first_frame_properties, "image", NULL ); + + // which frames are buffered? + + int error = 0; + + if( first_image == NULL ) + { + error = mlt_frame_get_image( first_frame, &first_image, format, width, height, writable ); + + if( error != 0 ) { + fprintf(stderr, "first_image == NULL get image died\n"); + return error; + } + } + + // Start with a base image + memcpy( output, first_image, size ); + + *image = output; + mlt_properties_set_data( frame_properties, "image", output, size, NULL, NULL ); + + // Make sure that no further scaling is done + mlt_properties_set( frame_properties, "rescale.interps", "none" ); + mlt_properties_set( frame_properties, "scale", "off" ); + + mlt_frame_close( first_frame ); + + return 0; +} + +static int framebuffer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index ) +{ + // Construct a new frame + *frame = mlt_frame_init( ); + mlt_properties properties = MLT_PRODUCER_PROPERTIES(this); + + if( frame != NULL ) + { + mlt_frame first_frame = mlt_properties_get_data( properties, "first_frame", NULL ); + + mlt_position first_position = (first_frame != NULL) ? mlt_frame_get_position( first_frame ) : -1; + + // Get the real producer + mlt_producer real_producer = mlt_properties_get_data( properties, "producer", NULL ); + + // Our "in" needs to be the same, keep it so + mlt_properties_pass_list( MLT_PRODUCER_PROPERTIES( real_producer ), properties, "in" ); + + // get properties + int strobe = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES (this), "strobe"); + double prod_speed = mlt_properties_get_double( properties, "_speed"); + double prod_end_speed = mlt_properties_get_double( properties, "end_speed"); + + // calculate actual speed and position + double actual_speed = prod_speed + ((double)mlt_producer_position( this ) / (double)mlt_producer_get_length(this)) * (prod_end_speed - prod_speed); + double actual_position = actual_speed * (double)mlt_producer_position( this ); + if (mlt_properties_get_int( properties, "reverse")) actual_position = mlt_producer_get_length(this) - actual_position; + + mlt_position need_first; + + + if (strobe == 1) + { + need_first = floor( actual_position ); + } + else + { + // Strobe effect wanted, calculate frame position + need_first = floor( actual_position ); + need_first -= need_first%strobe; + } + + if( need_first != first_position ) + { + mlt_frame_close( first_frame ); + first_position = -1; + first_frame = NULL; + } + + if( first_frame == NULL ) + { + // Seek the producer to the correct place + mlt_producer_seek( real_producer, need_first ); + + // Get the frame + mlt_service_get_frame( MLT_PRODUCER_SERVICE( real_producer ), &first_frame, index ); + } + + + // Make sure things are in their place + mlt_properties_set_data( properties, "first_frame", first_frame, 0, NULL, NULL ); + + // Stack the producer and producer's get image + mlt_frame_push_service( *frame, first_frame ); + mlt_properties_inc_ref( MLT_FRAME_PROPERTIES( first_frame ) ); + + mlt_frame_push_service( *frame, this ); + mlt_frame_push_service( *frame, framebuffer_get_image ); + + // Give the returned frame temporal identity + mlt_frame_set_position( *frame, mlt_producer_position( this ) ); + + } + + return 0; +} + + +mlt_producer producer_framebuffer_init( char *arg ) +{ + mlt_producer this = mlt_producer_new( ); + fprintf( stderr, " + + ++ USING FRAMEBUFF %s\n", arg); + // Wrap fezzik + mlt_producer real_producer; + + // Check if a speed was specified. + /** + + * Speed must be appended to the filename with ':'. To play your video at 50%: + inigo framebuffer:my_video.mpg:0.5 + + * You can have a variabl speed by specifying a start and an end speed: + inigo framebuffer:my_video.mpg:0.5:1.0 + + * Stroboscope effect can be obtained by adding a stobe=x parameter, where + x is the number of frames that will be ignored. + + * You can play the movie backwards by adding reverse=1 + **/ + + double speed; + double end_speed; + int count; + char *props = strdup( arg ); + char *ptr = props; + count = strcspn( ptr, ":" ); + ptr[count] = '\0'; + real_producer = mlt_factory_producer( "fezzik", ptr ); + + ptr += count + 1; + ptr += strspn( ptr, ":" ); + count = strcspn( ptr, ":" ); + ptr[count] = '\0'; + speed = atof(ptr); + + ptr += count + 1; + ptr += strspn( ptr, ":" ); + count = strcspn( ptr, ":" ); + ptr[count] = '\0'; + end_speed = atof(ptr); + free( props ); + + // If no end speed specified, use constant speed + if (speed == 0.0) speed = 1.0; + if (end_speed == 0.0) end_speed = speed; + + + if ( this != NULL && real_producer != NULL) + { + // Get the properties of this producer + mlt_properties properties = MLT_PRODUCER_PROPERTIES( this ); + + // Fezzik normalised it for us already + mlt_properties_set_int( properties, "fezzik_normalised", 1); + + // Store the producer and fitler + mlt_properties_set_data( properties, "producer", real_producer, 0, ( mlt_destructor )mlt_producer_close, NULL ); + + // Grap some stuff from the real_producer + mlt_properties_pass_list( properties, MLT_PRODUCER_PROPERTIES( real_producer ), + "in, out, length, resource" ); + + if (speed != 1.0 || end_speed !=1.0) + { + // Speed is not 1.0, so adjust the clip length + mlt_position real_out = mlt_properties_get_position(properties, "out"); + mlt_properties_set_position( properties, "out", real_out * 2 / (speed + end_speed)); + mlt_properties_set_position( properties, "length", real_out * 2 / (speed + end_speed) + 1); + mlt_properties_set_double( properties, "_speed", speed); + mlt_properties_set_double( properties, "end_speed", end_speed); + } + else mlt_properties_set_double( properties, "end_speed", 1.0); + + // Since we control the seeking, prevent it from seeking on its own + mlt_producer_set_speed( real_producer, 0 ); + mlt_producer_set_speed( this, speed ); + + // Override the get_frame method + this->get_frame = framebuffer_get_frame; + + } + else + { + if ( this ) + mlt_producer_close( this ); + if ( real_producer ) + mlt_producer_close( real_producer ); + + this = NULL; + } + return this; +} diff --git a/src/modules/core/producer_framebuffer.h b/src/modules/core/producer_framebuffer.h new file mode 100644 index 0000000..0425b9a --- /dev/null +++ b/src/modules/core/producer_framebuffer.h @@ -0,0 +1,28 @@ +/* + * producer_colour.h -- raster image loader based upon gdk-pixbuf + * Copyright (C) 2003-2004 Ushodaya Enterprises Limited + * Author: Dan Dennedy + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifndef _PRODUCER_FRAMEBUFFER_H_ +#define _PRODUCER_FRAMEBUFFER_H_ + +#include + +extern mlt_producer producer_framebuffer_init( char *arg ); + +#endif