#include "config.h"
#include "mlt_playlist.h"
+#include "mlt_frame.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/** Virtual playlist entry.
+*/
+
+typedef struct
+{
+ mlt_producer producer;
+ mlt_timecode in;
+ mlt_timecode playtime;
+}
+playlist_entry;
/** Private definition.
*/
struct mlt_playlist_s
{
struct mlt_producer_s parent;
+ struct mlt_producer_s blank;
+
+ int size;
int count;
- int track;
+ playlist_entry **list;
};
-/** Constructor.
+/** Forward declarations
+*/
+
+static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index );
- TODO: Override and implement all transport related method.
- TODO: Override and implement a time code normalising service get_frame
+/** Constructor.
*/
mlt_playlist mlt_playlist_init( )
if ( this != NULL )
{
mlt_producer producer = &this->parent;
- if ( mlt_producer_init( producer, this ) != 0 )
- {
- free( this );
- this = NULL;
- }
+
+ // Construct the producer
+ mlt_producer_init( producer, this );
+
+ // Override the producer get_frame
+ producer->get_frame = producer_get_frame;
+
+ // Initialise blank
+ mlt_producer_init( &this->blank, NULL );
+
+ // Indicate that this producer is a playlist
+ mlt_properties_set_data( mlt_playlist_properties( this ), "playlist", this, 0, NULL, NULL );
}
return this;
return mlt_producer_service( &this->parent );
}
-/** Append a producer to the playlist.
+/** Get the propertues associated to this playlist.
+*/
+
+mlt_properties mlt_playlist_properties( mlt_playlist this )
+{
+ return mlt_producer_properties( &this->parent );
+}
+
+static int mlt_playlist_virtual_refresh( mlt_playlist this )
+{
+ int i = 0;
+
+ // Get the fps of the first producer
+ double fps = mlt_properties_get_double( mlt_playlist_properties( this ), "first_fps" );
+ mlt_timecode playtime = 0;
+
+ for ( i = 0; i < this->count; i ++ )
+ {
+ // Get the producer
+ mlt_producer producer = this->list[ i ]->producer;
+
+ // If fps is 0
+ if ( fps == 0 )
+ {
+ // Inherit it from the producer
+ fps = mlt_producer_get_fps( producer );
+ }
+ else if ( fps != mlt_properties_get_double( mlt_producer_properties( producer ), "fps" ) )
+ {
+ // Generate a warning for now - the following attempt to fix may fail
+ fprintf( stderr, "Warning: fps mismatch on playlist producer %d\n", this->count );
+
+ // It should be safe to impose fps on an image producer, but not necessarily safe for video
+ mlt_properties_set_double( mlt_producer_properties( producer ), "fps", fps );
+ }
+
+ // Update the playtime for this clip
+ playtime += this->list[ i ]->playtime;
+ }
+
+ // Refresh all properties
+ mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", fps );
+ mlt_properties_set_double( mlt_playlist_properties( this ), "fps", fps );
+ mlt_properties_set_timecode( mlt_playlist_properties( this ), "length", playtime );
+ mlt_properties_set_timecode( mlt_playlist_properties( this ), "out", playtime );
+
+ return 0;
+}
- TODO: Implement
- TODO: Extract length information from the producer.
+/** Append to the virtual playlist.
+*/
+
+static int mlt_playlist_virtual_append( mlt_playlist this, mlt_producer producer, mlt_timecode in, mlt_timecode out )
+{
+ // Check that we have room
+ if ( this->count >= this->size )
+ {
+ int i;
+ this->list = realloc( this->list, ( this->size + 10 ) * sizeof( playlist_entry * ) );
+ for ( i = this->size; i < this->size + 10; i ++ )
+ this->list[ i ] = NULL;
+ this->size += 10;
+ }
+
+ this->list[ this->count ] = calloc( sizeof( playlist_entry ), 1 );
+ this->list[ this->count ]->producer = producer;
+ this->list[ this->count ]->in = in;
+ this->list[ this->count ]->playtime = out - in;
+
+ this->count ++;
+
+ return mlt_playlist_virtual_refresh( this );
+}
+
+/** Seek in the virtual playlist.
+*/
+
+static mlt_producer mlt_playlist_virtual_seek( mlt_playlist this )
+{
+ // Default producer to blank
+ mlt_producer producer = &this->blank;
+
+ // Map playlist position to real producer in virtual playlist
+ mlt_timecode position = mlt_producer_position( &this->parent );
+
+ // Loop through the virtual playlist
+ int i = 0;
+
+ for ( i = 0; i < this->count; i ++ )
+ {
+ if ( position < this->list[ i ]->playtime )
+ {
+ // Found it, now break
+ producer = this->list[ i ]->producer;
+ position += this->list[ i ]->in;
+ break;
+ }
+ else
+ {
+ // Decrement position by length of this entry
+ position -= this->list[ i ]->playtime;
+ }
+ }
+
+ // Seek in real producer to relative position
+ mlt_producer_seek( producer, position );
+
+ return producer;
+}
+
+static mlt_producer mlt_playlist_virtual_set_out( mlt_playlist this )
+{
+ // Default producer to blank
+ mlt_producer producer = &this->blank;
+
+ // Map playlist position to real producer in virtual playlist
+ mlt_timecode position = mlt_producer_position( &this->parent );
+
+ // Loop through the virtual playlist
+ int i = 0;
+
+ for ( i = 0; i < this->count; i ++ )
+ {
+ if ( position < this->list[ i ]->playtime )
+ {
+ // Found it, now break
+ producer = this->list[ i ]->producer;
+ position += this->list[ i ]->in;
+ break;
+ }
+ else
+ {
+ // Decrement position by length of this entry
+ position -= this->list[ i ]->playtime;
+ }
+ }
+
+ // Seek in real producer to relative position
+ if ( i < this->count )
+ {
+ // Update the playtime for the changed clip (hmmm)
+ this->list[ i ]->playtime = position - this->list[ i ]->in;
+
+ // Refresh the playlist
+ mlt_playlist_virtual_refresh( this );
+ }
+
+ return producer;
+}
+
+int mlt_playlist_current_clip( mlt_playlist this )
+{
+ // Map playlist position to real producer in virtual playlist
+ mlt_timecode position = mlt_producer_position( &this->parent );
+
+ // Loop through the virtual playlist
+ int i = 0;
+
+ for ( i = 0; i < this->count; i ++ )
+ {
+ if ( position < this->list[ i ]->playtime )
+ {
+ // Found it, now break
+ break;
+ }
+ else
+ {
+ // Decrement position by length of this entry
+ position -= this->list[ i ]->playtime;
+ }
+ }
+
+ return i;
+}
+
+mlt_producer mlt_playlist_current( mlt_playlist this )
+{
+ int i = mlt_playlist_current_clip( this );
+ if ( i < this->count )
+ return this->list[ i ]->producer;
+ else
+ return &this->blank;
+}
+
+/** Get the timecode which corresponds to the start of the next clip.
+*/
+
+mlt_timecode mlt_playlist_clip( mlt_playlist this, mlt_whence whence, int index )
+{
+ mlt_timecode position = 0;
+ int absolute_clip = index;
+ int i = 0;
+
+ // Determine the absolute clip
+ switch ( whence )
+ {
+ case mlt_whence_relative_start:
+ absolute_clip = index;
+ break;
+
+ case mlt_whence_relative_current:
+ absolute_clip = mlt_playlist_current_clip( this ) + index;
+ break;
+
+ case mlt_whence_relative_end:
+ absolute_clip = this->count - index;
+ break;
+ }
+
+ // Check that we're in a valid range
+ if ( absolute_clip < 0 )
+ absolute_clip = 0;
+ else if ( absolute_clip > this->count )
+ absolute_clip = this->count;
+
+ // Now determine the timecode
+ for ( i = 0; i < absolute_clip; i ++ )
+ position += this->list[ i ]->playtime;
+
+ return position;
+}
+
+int mlt_playlist_get_clip_info( mlt_playlist this, mlt_playlist_clip_info *info, int index )
+{
+ int error = index < 0 || index >= this->count;
+ if ( !error )
+ {
+ mlt_producer producer = this->list[ index ]->producer;
+ mlt_properties properties = mlt_producer_properties( producer );
+ info->resource = mlt_properties_get( properties, "resource" );
+ info->in = this->list[ index ]->in;
+ info->out = this->list[ index ]->in + this->list[ index ]->playtime;
+ info->playtime = this->list[ index ]->playtime;
+ info->length = mlt_producer_get_length( producer );
+ info->fps = mlt_producer_get_fps( producer );
+ }
+ return error;
+}
+
+/** Get number of clips in the playlist.
+*/
+
+int mlt_playlist_count( mlt_playlist this )
+{
+ return this->count;
+}
+
+/** Clear the playlist.
+*/
+
+int mlt_playlist_clear( mlt_playlist this )
+{
+ this->count = 0;
+ return mlt_playlist_virtual_refresh( this );
+}
+
+/** Append a producer to the playlist.
*/
int mlt_playlist_append( mlt_playlist this, mlt_producer producer )
{
- return 0;
+ // Append to virtual list
+ return mlt_playlist_virtual_append( this, producer, 0, mlt_producer_get_playtime( producer ) );
}
-/** Append a blank to the playlist of a given length.
+/** Append a producer to the playlist with in/out points.
+*/
- TODO: Implement
+int mlt_playlist_append_io( mlt_playlist this, mlt_producer producer, double in, double out )
+{
+ // Append to virtual list
+ if ( in != -1 && out != -1 )
+ return mlt_playlist_virtual_append( this, producer, in, out - in );
+ else
+ return mlt_playlist_virtual_append( this, producer, 0, mlt_producer_get_playtime( producer ) );
+}
+
+/** Append a blank to the playlist of a given length.
*/
int mlt_playlist_blank( mlt_playlist this, mlt_timecode length )
{
+ // Append to the virtual list
+ return mlt_playlist_virtual_append( this, &this->blank, 0, length );
+}
+
+/** Get the current frame.
+*/
+
+static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
+{
+ // Get this mlt_playlist
+ mlt_playlist this = producer->child;
+
+ // Get the real producer
+ mlt_producer real = mlt_playlist_virtual_seek( this );
+
+ // Get the frame
+ mlt_service_get_frame( mlt_producer_service( real ), frame, index );
+
+ // Check if we're at the end of the clip
+ mlt_properties properties = mlt_frame_properties( *frame );
+ if ( mlt_properties_get_int( properties, "end_of_clip" ) )
+ mlt_playlist_virtual_set_out( this );
+
+ // Check for notifier and call with appropriate argument
+ mlt_properties playlist_properties = mlt_producer_properties( producer );
+ void ( *notifier )( void * ) = mlt_properties_get_data( playlist_properties, "notifier", NULL );
+ if ( notifier != NULL )
+ {
+ void *argument = mlt_properties_get_data( playlist_properties, "notifier_arg", NULL );
+ notifier( argument );
+ }
+
+ // Update timecode on the frame we're creating
+ mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
+
+ // Position ourselves on the next frame
+ mlt_producer_prepare_next( producer );
+
return 0;
}
/** Close the playlist.
*/
-mlt_playlist_close( mlt_playlist this )
+void mlt_playlist_close( mlt_playlist this )
{
mlt_producer_close( &this->parent );
+ mlt_producer_close( &this->blank );
free( this );
}
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