research.m1stereo.tv/gitweb/ - melted/blob - src/modules/core/producer_ppm.c

   1 /*
   2  * producer_ppm.c -- simple ppm test case
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "producer_ppm.h"
  22
  23 #include <framework/mlt_frame.h>
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 typedef struct producer_ppm_s *producer_ppm;
  29
  30 struct producer_ppm_s
  31 {
  32         struct mlt_producer_s parent;
  33         char *command;
  34         FILE *video;
  35         FILE *audio;
  36         uint64_t expected;
  37 };
  38
  39 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index );
  40 static void producer_close( mlt_producer parent );
  41
  42 mlt_producer producer_ppm_init( void *command )
  43 {
  44         producer_ppm this = calloc( sizeof( struct producer_ppm_s ), 1 );
  45         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  46         {
  47                 mlt_producer producer = &this->parent;
  48                 mlt_properties properties = mlt_producer_properties( producer );
  49
  50                 producer->get_frame = producer_get_frame;
  51                 producer->close = producer_close;
  52
  53                 if ( command != NULL )
  54                 {
  55                         mlt_properties_set( properties, "resource", command );
  56                         this->command = strdup( command );
  57                 }
  58                 else
  59                 {
  60                         mlt_properties_set( properties, "resource", "ppm test" );
  61                 }
  62
  63                 return producer;
  64         }
  65         free( this );
  66         return NULL;
  67 }
  68
  69 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
  70 {
  71         // Get the frames properties
  72         mlt_properties properties = mlt_frame_properties( this );
  73
  74         if ( mlt_properties_get_int( properties, "has_image" ) )
  75         {
  76                 // Get the RGB image
  77                 uint8_t *rgb = mlt_properties_get_data( properties, "image", NULL );
  78
  79                 // Get width and height
  80                 *width = mlt_properties_get_int( properties, "width" );
  81                 *height = mlt_properties_get_int( properties, "height" );
  82
  83                 // Convert to requested format
  84                 if ( *format == mlt_image_yuv422 )
  85                 {
  86                         void *release = NULL;
  87                         uint8_t *image = mlt_pool_allocate( *width * ( *height + 1 ) * 2, &release );
  88                         mlt_convert_rgb24_to_yuv422( rgb, *width, *height, *width * 3, image );
  89                         mlt_properties_set_data( properties, "image_release", release, 0, ( mlt_destructor )mlt_pool_release, NULL );
  90                         mlt_properties_set_data( properties, "image", image, *width * ( *height + 1 ) * 2, NULL, NULL );
  91                         *buffer = image;
  92                 }
  93                 else if ( *format == mlt_image_rgb24 )
  94                 {
  95                         *buffer = rgb;
  96                 }
  97         }
  98         else
  99         {
 100                 mlt_frame_get_image( this, buffer, format, width, height, writable );
 101         }
 102
 103         return 0;
 104 }
 105
 106 FILE *producer_ppm_run_video( producer_ppm this )
 107 {
 108         if ( this->video == NULL )
 109         {
 110                 if ( this->command == NULL )
 111                 {
 112                         this->video = popen( "image2raw -k -r 25 -ppm /usr/share/pixmaps/*.png", "r" );
 113                 }
 114                 else
 115                 {
 116                         char command[ 1024 ];
 117                         float fps = mlt_producer_get_fps( &this->parent );
 118                         float position = mlt_producer_position( &this->parent );
 119                         sprintf( command, "ffmpeg -i \"%s\" -ss %f -f imagepipe -r %f -img ppm - 2>/dev/null", this->command, position, fps );
 120                         this->video = popen( command, "r" );
 121                 }
 122         }
 123         return this->video;
 124 }
 125
 126 FILE *producer_ppm_run_audio( producer_ppm this )
 127 {
 128         if ( this->audio == NULL )
 129         {
 130                 if ( this->command != NULL )
 131                 {
 132                         char command[ 1024 ];
 133                         float position = mlt_producer_position( &this->parent );
 134                         sprintf( command, "ffmpeg -i \"%s\" -ss %f -f s16le -ar 48000 -ac 2 - 2>/dev/null", this->command, position );
 135                         this->audio = popen( command, "r" );
 136                 }
 137         }
 138         return this->audio;
 139 }
 140
 141 static void producer_ppm_position( producer_ppm this, uint64_t requested )
 142 {
 143         if ( requested != this->expected )
 144         {
 145                 if ( this->video != NULL )
 146                         pclose( this->video );
 147                 this->video = NULL;
 148                 if ( this->audio != NULL )
 149                         pclose( this->audio );
 150                 this->audio = NULL;
 151         }
 152
 153         // This is the next frame we expect
 154         this->expected = mlt_producer_frame( &this->parent ) + 1;
 155
 156         // Open the pipe
 157         this->video = producer_ppm_run_video( this );
 158
 159         // Open the audio pipe
 160         this->audio = producer_ppm_run_audio( this );
 161
 162 }
 163
 164 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 165 {
 166         // Get the frames properties
 167         mlt_properties properties = mlt_frame_properties( this );
 168
 169         FILE *pipe = mlt_properties_get_data( properties, "audio.pipe", NULL );
 170
 171         *frequency = 48000;
 172         *channels = 2;
 173         *samples = 1920;
 174
 175         // Size
 176         int size = *samples * *channels * 2;
 177
 178         // Allocate an image
 179         *buffer = malloc( size );
 180
 181         // Read it
 182         if ( pipe != NULL )
 183                 fread( *buffer, size, 1, pipe );
 184         else
 185                 memset( *buffer, 0, size );
 186
 187         // Pass the data on the frame properties
 188         mlt_properties_set_data( properties, "audio", *buffer, size, free, NULL );
 189
 190         return 0;
 191 }
 192
 193 static int read_ppm_header( FILE *video, int *width, int *height )
 194 {
 195         int count = 0;
 196         {
 197                 char temp[ 132 ];
 198                 fgets( temp, 132, video );
 199                 fgets( temp, 132, video );
 200                 count += sscanf( temp, "%d %d", width, height );
 201                 fgets( temp, 132, video );
 202         }
 203         return count;
 204 }
 205
 206 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 207 {
 208         producer_ppm this = producer->child;
 209         int width;
 210         int height;
 211
 212         // Construct a test frame
 213         *frame = mlt_frame_init( );
 214
 215         // Are we at the position expected?
 216         producer_ppm_position( this, mlt_producer_frame( producer ) );
 217
 218         // Get the frames properties
 219         mlt_properties properties = mlt_frame_properties( *frame );
 220
 221         FILE *video = this->video;
 222         FILE *audio = this->audio;
 223
 224         // Read the video
 225         if ( video != NULL && read_ppm_header( video, &width, &height ) == 2 )
 226         {
 227                 // Allocate an image
 228                 void *release = NULL;
 229                 uint8_t *image = mlt_pool_allocate( width * ( height + 1 ) * 3, &release );
 230
 231                 // Read it
 232                 fread( image, width * height * 3, 1, video );
 233
 234                 // Pass the data on the frame properties
 235                 mlt_properties_set_data( properties, "image_release", release, 0, ( mlt_destructor )mlt_pool_release, NULL );
 236                 mlt_properties_set_data( properties, "image", image, width * ( height + 1 ) * 3, NULL, NULL );
 237                 mlt_properties_set_int( properties, "width", width );
 238                 mlt_properties_set_int( properties, "height", height );
 239                 mlt_properties_set_int( properties, "has_image", 1 );
 240                 mlt_properties_set_int( properties, "progressive", 1 );
 241                 mlt_properties_set_double( properties, "aspect_ratio", ( double )width  / height );
 242
 243                 // Push the image callback
 244                 mlt_frame_push_get_image( *frame, producer_get_image );
 245         }
 246         else
 247         {
 248                 // Push the image callback
 249                 mlt_frame_push_get_image( *frame, producer_get_image );
 250         }
 251
 252         // Set the audio pipe
 253         mlt_properties_set_data( properties, "audio.pipe", audio, 0, NULL, NULL );
 254
 255         // Hmm - register audio callback
 256         ( *frame )->get_audio = producer_get_audio;
 257
 258         // Update timecode on the frame we're creating
 259         mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 260
 261         // Calculate the next timecode
 262         mlt_producer_prepare_next( producer );
 263
 264         return 0;
 265 }
 266
 267 static void producer_close( mlt_producer parent )
 268 {
 269         producer_ppm this = parent->child;
 270         if ( this->video )
 271                 pclose( this->video );
 272         if ( this->audio )
 273                 pclose( this->audio );
 274         free( this->command );
 275         parent->close = NULL;
 276         mlt_producer_close( parent );
 277         free( this );
 278 }
 279