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 #include <framework/mlt_frame.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 typedef struct producer_ppm_s *producer_ppm;
  27
  28 struct producer_ppm_s
  29 {
  30         struct mlt_producer_s parent;
  31         char *command;
  32         FILE *video;
  33         FILE *audio;
  34         uint64_t expected;
  35 };
  36
  37 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index );
  38 static void producer_close( mlt_producer parent );
  39
  40 mlt_producer producer_ppm_init( void *command )
  41 {
  42         producer_ppm this = calloc( sizeof( struct producer_ppm_s ), 1 );
  43         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  44         {
  45                 mlt_producer producer = &this->parent;
  46
  47                 producer->get_frame = producer_get_frame;
  48                 producer->close = producer_close;
  49
  50                 if ( command != NULL )
  51                         this->command = strdup( command );
  52
  53                 return producer;
  54         }
  55         free( this );
  56         return NULL;
  57 }
  58
  59 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
  60 {
  61         // Get the frames properties
  62         mlt_properties properties = mlt_frame_properties( this );
  63
  64         if ( mlt_properties_get_int( properties, "has_image" ) )
  65         {
  66                 // Get the RGB image
  67                 uint8_t *rgb = mlt_properties_get_data( properties, "image", NULL );
  68
  69                 // Get width and height
  70                 *width = mlt_properties_get_int( properties, "width" );
  71                 *height = mlt_properties_get_int( properties, "height" );
  72
  73                 // Convert to requested format
  74                 if ( *format == mlt_image_yuv422 )
  75                 {
  76                         uint8_t *image = malloc( *width * *height * 2 );
  77                         mlt_convert_rgb24_to_yuv422( rgb, *width, *height, *width * 3, image );
  78                         mlt_properties_set_data( properties, "image", image, *width * *height * 2, free, NULL );
  79                         *buffer = image;
  80                 }
  81                 else if ( *format == mlt_image_rgb24 )
  82                 {
  83                         *buffer = rgb;
  84                 }
  85         }
  86         else
  87         {
  88                 mlt_frame_get_image( this, buffer, format, width, height, writable );
  89         }
  90
  91         return 0;
  92 }
  93
  94 FILE *producer_ppm_run_video( producer_ppm this )
  95 {
  96         if ( this->video == NULL )
  97         {
  98                 if ( this->command == NULL )
  99                 {
 100                         this->video = popen( "image2raw -k -r 25 -ppm /usr/share/pixmaps/*.png", "r" );
 101                 }
 102                 else
 103                 {
 104                         char command[ 1024 ];
 105                         float fps = mlt_producer_get_fps( &this->parent );
 106                         float position = mlt_producer_position( &this->parent );
 107                         sprintf( command, "ffmpeg -i \"%s\" -ss %f -f imagepipe -r %f -img ppm - 2>/dev/null", this->command, position, fps );
 108                         this->video = popen( command, "r" );
 109                 }
 110         }
 111         return this->video;
 112 }
 113
 114 FILE *producer_ppm_run_audio( producer_ppm this )
 115 {
 116         if ( this->audio == NULL )
 117         {
 118                 if ( this->command != NULL )
 119                 {
 120                         char command[ 1024 ];
 121                         float position = mlt_producer_position( &this->parent );
 122                         sprintf( command, "ffmpeg -i \"%s\" -ss %f -f s16le -ar 48000 -ac 2 - 2>/dev/null", this->command, position );
 123                         this->audio = popen( command, "r" );
 124                 }
 125         }
 126         return this->audio;
 127 }
 128
 129 static void producer_ppm_position( producer_ppm this, uint64_t requested )
 130 {
 131         if ( requested != this->expected )
 132         {
 133                 if ( this->video != NULL )
 134                         pclose( this->video );
 135                 this->video = NULL;
 136                 if ( this->audio != NULL )
 137                         pclose( this->audio );
 138                 this->audio = NULL;
 139         }
 140
 141         // This is the next frame we expect
 142         this->expected = mlt_producer_frame( &this->parent ) + 1;
 143
 144         // Open the pipe
 145         this->video = producer_ppm_run_video( this );
 146
 147         // Open the audio pipe
 148         this->audio = producer_ppm_run_audio( this );
 149
 150 }
 151
 152 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 153 {
 154         // Get the frames properties
 155         mlt_properties properties = mlt_frame_properties( this );
 156
 157         FILE *pipe = mlt_properties_get_data( properties, "audio.pipe", NULL );
 158
 159         *frequency = 48000;
 160         *channels = 2;
 161         *samples = 1920;
 162
 163         // Size
 164         int size = *samples * *channels * 2;
 165
 166         // Allocate an image
 167         *buffer = malloc( size );
 168
 169         // Read it
 170         if ( pipe != NULL )
 171                 fread( *buffer, size, 1, pipe );
 172         else
 173                 memset( *buffer, 0, size );
 174
 175         // Pass the data on the frame properties
 176         mlt_properties_set_data( properties, "audio", *buffer, size, free, NULL );
 177
 178         return 0;
 179 }
 180
 181 static int read_ppm_header( FILE *video, int *width, int *height )
 182 {
 183         int count = 0;
 184         {
 185                 char temp[ 132 ];
 186                 fgets( temp, 132, video );
 187                 fgets( temp, 132, video );
 188                 count += sscanf( temp, "%d %d", width, height );
 189                 fgets( temp, 132, video );
 190         }
 191         return count;
 192 }
 193
 194 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 195 {
 196         producer_ppm this = producer->child;
 197         int width;
 198         int height;
 199
 200         // Construct a test frame
 201         *frame = mlt_frame_init( );
 202
 203         // Are we at the position expected?
 204         producer_ppm_position( this, mlt_producer_frame( producer ) );
 205
 206         // Get the frames properties
 207         mlt_properties properties = mlt_frame_properties( *frame );
 208
 209         FILE *video = this->video;
 210         FILE *audio = this->audio;
 211
 212         // Read the video
 213         if ( video != NULL && read_ppm_header( video, &width, &height ) == 2 )
 214         {
 215
 216                 // Allocate an image
 217                 uint8_t *image = malloc( width * height * 3 );
 218
 219                 // Read it
 220                 fread( image, width * height * 3, 1, video );
 221
 222                 // Pass the data on the frame properties
 223                 mlt_properties_set_data( properties, "image", image, width * height * 3, free, NULL );
 224                 mlt_properties_set_int( properties, "width", width );
 225                 mlt_properties_set_int( properties, "height", height );
 226                 mlt_properties_set_int( properties, "has_image", 1 );
 227
 228                 // Push the image callback
 229                 mlt_frame_push_get_image( *frame, producer_get_image );
 230         }
 231         else
 232         {
 233                 // Push the image callback
 234                 mlt_frame_push_get_image( *frame, producer_get_image );
 235         }
 236
 237         // Set the audio pipe
 238         mlt_properties_set_data( properties, "audio.pipe", audio, 0, NULL, NULL );
 239
 240         // Hmm - register audio callback
 241         ( *frame )->get_audio = producer_get_audio;
 242
 243         // Update timecode on the frame we're creating
 244         mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
 245
 246         // Calculate the next timecode
 247         mlt_producer_prepare_next( producer );
 248
 249         return 0;
 250 }
 251
 252 static void producer_close( mlt_producer parent )
 253 {
 254         producer_ppm this = parent->child;
 255         if ( this->video )
 256                 pclose( this->video );
 257         if ( this->audio )
 258                 pclose( this->audio );
 259         free( this->command );
 260         parent->close = NULL;
 261         mlt_producer_close( parent );
 262         free( this );
 263 }
 264