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 = ( mlt_destructor )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                         uint8_t *image = mlt_pool_alloc( *width * ( *height + 1 ) * 2 );
  87                         mlt_convert_rgb24_to_yuv422( rgb, *width, *height, *width * 3, image );
  88                         mlt_properties_set_data( properties, "image", image, *width * ( *height + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
  89                         *buffer = image;
  90                 }
  91                 else if ( *format == mlt_image_rgb24 )
  92                 {
  93                         *buffer = rgb;
  94                 }
  95         }
  96         else
  97         {
  98                 mlt_frame_get_image( this, buffer, format, width, height, writable );
  99         }
 100
 101         return 0;
 102 }
 103
 104 FILE *producer_ppm_run_video( producer_ppm this )
 105 {
 106         if ( this->video == NULL )
 107         {
 108                 if ( this->command == NULL )
 109                 {
 110                         this->video = popen( "image2raw -k -r 25 -ppm /usr/share/pixmaps/*.png", "r" );
 111                 }
 112                 else
 113                 {
 114                         char command[ 1024 ];
 115                         float fps = mlt_producer_get_fps( &this->parent );
 116                         float position = mlt_producer_position( &this->parent );
 117                         sprintf( command, "ffmpeg -i \"%s\" -ss %f -f imagepipe -r %f -img ppm - 2>/dev/null", this->command, position, fps );
 118                         this->video = popen( command, "r" );
 119                 }
 120         }
 121         return this->video;
 122 }
 123
 124 FILE *producer_ppm_run_audio( producer_ppm this )
 125 {
 126         if ( this->audio == NULL )
 127         {
 128                 if ( this->command != NULL )
 129                 {
 130                         char command[ 1024 ];
 131                         float position = mlt_producer_position( &this->parent );
 132                         sprintf( command, "ffmpeg -i \"%s\" -ss %f -f s16le -ar 48000 -ac 2 - 2>/dev/null", this->command, position );
 133                         this->audio = popen( command, "r" );
 134                 }
 135         }
 136         return this->audio;
 137 }
 138
 139 static void producer_ppm_position( producer_ppm this, uint64_t requested )
 140 {
 141         if ( requested != this->expected )
 142         {
 143                 if ( this->video != NULL )
 144                         pclose( this->video );
 145                 this->video = NULL;
 146                 if ( this->audio != NULL )
 147                         pclose( this->audio );
 148                 this->audio = NULL;
 149         }
 150
 151         // This is the next frame we expect
 152         this->expected = mlt_producer_frame( &this->parent ) + 1;
 153
 154         // Open the pipe
 155         this->video = producer_ppm_run_video( this );
 156
 157         // Open the audio pipe
 158         this->audio = producer_ppm_run_audio( this );
 159
 160 }
 161
 162 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 163 {
 164         // Get the frames properties
 165         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 166
 167         FILE *pipe = mlt_properties_get_data( properties, "audio.pipe", NULL );
 168
 169         *frequency = 48000;
 170         *channels = 2;
 171         *samples = 1920;
 172
 173         // Size
 174         int size = *samples * *channels * 2;
 175
 176         // Allocate an image
 177         *buffer = malloc( size );
 178
 179         // Read it
 180         if ( pipe != NULL )
 181                 fread( *buffer, size, 1, pipe );
 182         else
 183                 memset( *buffer, 0, size );
 184
 185         // Pass the data on the frame properties
 186         mlt_properties_set_data( properties, "audio", *buffer, size, free, NULL );
 187
 188         return 0;
 189 }
 190
 191 static int read_ppm_header( FILE *video, int *width, int *height )
 192 {
 193         int count = 0;
 194         {
 195                 char temp[ 132 ];
 196                 fgets( temp, 132, video );
 197                 fgets( temp, 132, video );
 198                 count += sscanf( temp, "%d %d", width, height );
 199                 fgets( temp, 132, video );
 200         }
 201         return count;
 202 }
 203
 204 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 205 {
 206         producer_ppm this = producer->child;
 207         int width;
 208         int height;
 209
 210         // Construct a test frame
 211         *frame = mlt_frame_init( );
 212
 213         // Are we at the position expected?
 214         producer_ppm_position( this, mlt_producer_frame( producer ) );
 215
 216         // Get the frames properties
 217         mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 218
 219         FILE *video = this->video;
 220         FILE *audio = this->audio;
 221
 222         // Read the video
 223         if ( video != NULL && read_ppm_header( video, &width, &height ) == 2 )
 224         {
 225                 // Allocate an image
 226                 uint8_t *image = mlt_pool_alloc( width * ( height + 1 ) * 3 );
 227
 228                 // Read it
 229                 fread( image, width * height * 3, 1, video );
 230
 231                 // Pass the data on the frame properties
 232                 mlt_properties_set_data( properties, "image", image, width * ( height + 1 ) * 3, ( mlt_destructor )mlt_pool_release, NULL );
 233                 mlt_properties_set_int( properties, "width", width );
 234                 mlt_properties_set_int( properties, "height", height );
 235                 mlt_properties_set_int( properties, "has_image", 1 );
 236                 mlt_properties_set_int( properties, "progressive", 1 );
 237                 mlt_properties_set_double( properties, "aspect_ratio", 1 );
 238
 239                 // Push the image callback
 240                 mlt_frame_push_get_image( *frame, producer_get_image );
 241         }
 242         else
 243         {
 244                 // Push the image callback
 245                 mlt_frame_push_get_image( *frame, producer_get_image );
 246         }
 247
 248         // Set the audio pipe
 249         mlt_properties_set_data( properties, "audio.pipe", audio, 0, NULL, NULL );
 250
 251         // Hmm - register audio callback
 252         ( *frame )->get_audio = producer_get_audio;
 253
 254         // Update timecode on the frame we're creating
 255         mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 256
 257         // Calculate the next timecode
 258         mlt_producer_prepare_next( producer );
 259
 260         return 0;
 261 }
 262
 263 static void producer_close( mlt_producer parent )
 264 {
 265         producer_ppm this = parent->child;
 266         if ( this->video )
 267                 pclose( this->video );
 268         if ( this->audio )
 269                 pclose( this->audio );
 270         free( this->command );
 271         parent->close = NULL;
 272         mlt_producer_close( parent );
 273         free( this );
 274 }