producer->get_frame = producer_get_frame;
producer->close = producer_close;
- if ( command == NULL )
- this->command = strdup( "image2raw -n -a -r 3 -ppm /usr/share/pixmaps/*.png" );
- else
+ if ( command != NULL )
this->command = strdup( command );
- this->pipe = popen( this->command, "r" );
-
return producer;
}
free( this );
return 0;
}
+static void producer_ppm_position( producer_ppm this, uint64_t requested )
+{
+ if ( requested != this->expected )
+ {
+ if ( this->video != NULL )
+ pclose( this->video );
+ this->video = NULL;
+ if ( this->audio != NULL )
+ pclose( this->audio );
+ this->audio = NULL;
+ }
+
+ // This is the next frame we expect
+ this->expected = mlt_producer_frame( &this->parent ) + 1;
+}
+
+FILE *producer_ppm_run_video( producer_ppm this )
+{
+ if ( this->video == NULL )
+ {
+ if ( this->command == NULL )
+ {
+ this->video = popen( "image2raw -n -a -r 3 -ppm /usr/share/pixmaps/*.png", "r" );
+ }
+ else
+ {
+ char command[ 1024 ];
+ float fps = mlt_producer_get_fps( &this->parent );
+ float position = mlt_producer_position( &this->parent );
+ sprintf( command, "ffmpeg -i \"%s\" -ss %f -f imagepipe -r %f -img ppm -", this->command, position, fps );
+ this->video = popen( command, "r" );
+ }
+ }
+ return this->video;
+}
+
+FILE *producer_ppm_run_audio( producer_ppm this )
+{
+ if ( this->audio == NULL )
+ {
+ if ( this->command != NULL )
+ {
+ char command[ 1024 ];
+ float position = mlt_producer_position( &this->parent );
+ sprintf( command, "ffmpeg -i \"%s\" -ss %f -f s16le -ar 48000 -ac 2 -", this->command, position );
+ this->audio = popen( command, "r" );
+ }
+ }
+ return this->audio;
+}
+
+
+static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
+{
+ // Get the frames properties
+ mlt_properties properties = mlt_frame_properties( this );
+
+ FILE *pipe = mlt_properties_get_data( properties, "audio.pipe", NULL );
+
+ *frequency = 48000;
+ *channels = 2;
+ *samples = 1920;
+
+ // Size
+ int size = *samples * *channels * 2;
+
+ // Allocate an image
+ *buffer = malloc( size );
+
+ // Read it
+ fread( *buffer, size, 1, pipe );
+
+ // Pass the data on the frame properties
+ mlt_properties_set_data( properties, "audio", *buffer, size, free, NULL );
+
+ return 0;
+}
+
static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
{
producer_ppm this = producer->child;
// Construct a test frame
*frame = mlt_frame_init( );
- // Scan the header
- if ( fscanf( this->pipe, "P6\n%d %d\n255\n", &width, &height ) == 2 )
- {
- // Get the frames properties
- mlt_properties properties = mlt_frame_properties( *frame );
+ // Are we at the position expected?
+ producer_ppm_position( this, mlt_producer_frame( producer ) );
+
+ // Open the pipe
+ FILE *video = producer_ppm_run_video( this );
+
+ // Open the audio pipe
+ FILE *audio = producer_ppm_run_audio( this );
+
+ // Get the frames properties
+ mlt_properties properties = mlt_frame_properties( *frame );
+ // Read the video
+ if ( video != NULL && fscanf( video, "P6\n%d %d\n255\n", &width, &height ) == 2 )
+ {
// Allocate an image
uint8_t *image = malloc( width * height * 3 );
// Read it
- fread( image, width * height * 3, 1, this->pipe );
+ fread( image, width * height * 3, 1, video );
// Pass the data on the frame properties
mlt_properties_set_data( properties, "image", image, width * height * 3, free, NULL );
mlt_frame_push_get_image( *frame, producer_get_image );
}
+ // Read the audio
+ if ( audio != NULL )
+ {
+ // Set the audio pipe
+ mlt_properties_set_data( properties, "audio.pipe", audio, 0, NULL, NULL );
+
+ // Hmm - register audio callback
+ ( *frame )->get_audio = producer_get_audio;
+ }
+
// Update timecode on the frame we're creating
mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
static void producer_close( mlt_producer parent )
{
producer_ppm this = parent->child;
- pclose( this->pipe );
+ if ( this->video )
+ pclose( this->video );
+ if ( this->audio )
+ pclose( this->audio );
free( this->command );
parent->close = NULL;
mlt_producer_close( parent );