X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_playlist.c;h=32179aa35d7a8f5bc07a6f7f208ef1cdf67511c2;hb=426c659c0b9d0667e2399e60cf81341a51ac040f;hp=ffcb3d56c685b975c3bac1bceaa8a5f005c1205a;hpb=661165812e3410fe2f6f49d7af882b36a0efcf82;p=melted

diff --git a/src/framework/mlt_playlist.c b/src/framework/mlt_playlist.c
index ffcb3d5..32179aa 100644
--- a/src/framework/mlt_playlist.c
+++ b/src/framework/mlt_playlist.c
@@ -21,6 +21,24 @@
 #include "config.h"
 
 #include "mlt_playlist.h"
+#include "mlt_frame.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/** Virtual playlist entry.
+*/
+
+typedef struct
+{
+	mlt_producer producer;
+	int64_t frame_in;
+	int64_t frame_out;
+	int64_t frame_count;
+	mlt_timecode playtime;
+}
+playlist_entry;
 
 /** Private definition.
 */
@@ -28,14 +46,19 @@
 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
+*/
 
-	TODO: Override and implement all transport related method.
-	TODO: Override and implement a time code normalising service get_frame
+static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index );
+
+/** Constructor.
 */
 
 mlt_playlist mlt_playlist_init( )
@@ -44,11 +67,18 @@ 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;
@@ -70,32 +100,429 @@ mlt_service mlt_playlist_service( mlt_playlist 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;
 
-	TODO: Implement
-	TODO: Extract length information from the producer.
+	// 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 == 0 ? 25 : fps );
+	mlt_properties_set_timecode( mlt_playlist_properties( this ), "length", playtime );
+	mlt_properties_set_timecode( mlt_playlist_properties( this ), "out", playtime );
+
+	return 0;
+}
+
+/** Append to the virtual playlist.
+*/
+
+static int mlt_playlist_virtual_append( mlt_playlist this, mlt_producer producer, int64_t in, int64_t out )
+{
+	double fps = mlt_properties_get_double( mlt_playlist_properties( this ), "fps" );
+	double playtime = ( double )( out - in + 1 ) / fps;
+
+	// 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 ]->frame_in = in;
+	this->list[ this->count ]->frame_out = out;
+	this->list[ this->count ]->frame_count = out - in + 1;
+	this->list[ this->count ]->playtime = playtime;
+
+	mlt_producer_set_speed( producer, 0 );
+
+	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 = NULL;
+
+	// Map playlist position to real producer in virtual playlist
+	mlt_timecode pos = mlt_producer_position( &this->parent );
+	int64_t position = mlt_producer_frame_position( &this->parent, pos );
+	int64_t total = 0;
+
+	// Loop through the virtual playlist
+	int i = 0;
+
+	for ( i = 0; i < this->count; i ++ )
+	{
+		// Increment the total
+		total += this->list[ i ]->frame_count;
+
+		if ( position < this->list[ i ]->frame_count )
+		{
+			// Found it, now break
+			producer = this->list[ i ]->producer;
+			position += this->list[ i ]->frame_in;
+			break;
+		}
+		else
+		{
+			// Decrement position by length of this entry
+			position -= this->list[ i ]->frame_count;
+		}
+	}
+
+	// Seek in real producer to relative position
+	if ( producer != NULL )
+	{
+		mlt_producer_seek_frame( producer, position );
+	}
+	else if ( total > 0 )
+	{
+		playlist_entry *entry = this->list[ this->count - 1 ];
+		mlt_producer this_producer = mlt_playlist_producer( this );
+		mlt_producer_seek_frame( this_producer, total - 1 );
+		producer = entry->producer;
+		mlt_producer_seek_frame( producer, entry->frame_out );
+	}
+	else
+	{
+		mlt_producer_seek( mlt_playlist_producer( this ), 0 );
+		producer = &this->blank;
+	}
+
+	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 pos = mlt_producer_position( &this->parent );
+	int64_t position = mlt_producer_frame_position( &this->parent, pos );
+
+	// Loop through the virtual playlist
+	int i = 0;
+
+	for ( i = 0; i < this->count; i ++ )
+	{
+		if ( position < this->list[ i ]->frame_count )
+		{
+			// Found it, now break
+			producer = this->list[ i ]->producer;
+			break;
+		}
+		else
+		{
+			// Decrement position by length of this entry
+			position -= this->list[ i ]->frame_count;
+		}
+	}
+
+	// Seek in real producer to relative position
+	if ( i < this->count )
+	{
+		// Update the playtime for the changed clip (hmmm)
+		this->list[ i ]->frame_count = position + 1;
+		this->list[ i ]->frame_out = position - this->list[ i ]->frame_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 pos = mlt_producer_position( &this->parent );
+	int64_t position = mlt_producer_frame_position( &this->parent, pos );
+
+	// Loop through the virtual playlist
+	int i = 0;
+
+	for ( i = 0; i < this->count; i ++ )
+	{
+		if ( position < this->list[ i ]->frame_count )
+		{
+			// Found it, now break
+			break;
+		}
+		else
+		{
+			// Decrement position by length of this entry
+			position -= this->list[ i ]->frame_count;
+		}
+	}
+
+	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 )
+{
+	int64_t 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 ]->frame_count;
+
+	return mlt_producer_time( &this->parent, position );
+}
+
+int mlt_playlist_get_clip_info( mlt_playlist this, mlt_playlist_clip_info *info, int index )
+{
+	int error = index < 0 || index >= this->count;
+	memset( info, 0, sizeof( mlt_playlist_clip_info ) );
+	if ( !error )
+	{
+		mlt_producer producer = this->list[ index ]->producer;
+		mlt_properties properties = mlt_producer_properties( producer );
+		info->producer = producer;
+		info->start = mlt_playlist_clip( this, mlt_whence_relative_start, index );
+		info->resource = mlt_properties_get( properties, "resource" );
+		info->frame_in = this->list[ index ]->frame_in;
+		info->in = mlt_producer_time( producer, info->frame_in );
+		info->frame_out = this->list[ index ]->frame_out;
+		info->out = mlt_producer_time( producer, info->frame_out );
+		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;
+	mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", 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
+	int64_t out = mlt_producer_frame_position( producer, mlt_producer_get_out( producer ) );
+	return mlt_playlist_virtual_append( this, producer, 0, out );
 }
 
-/** Append a blank to the playlist of a given length.
+/** Append a producer to the playlist with in/out points.
+*/
+
+int mlt_playlist_append_io( mlt_playlist this, mlt_producer producer, double in, double out )
+{
+	// Append to virtual list
+	if ( in != -1 && out != -1 )
+	{
+		int64_t fin = mlt_producer_frame_position( producer, in );
+		int64_t fout = mlt_producer_frame_position( producer, out );
+		return mlt_playlist_virtual_append( this, producer, fin, fout );
+	}
+	else
+	{
+		return mlt_playlist_append( this, producer );
+	}
+}
 
-	TODO: Implement
+/** 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
+	int64_t fout = mlt_producer_frame_position( &this->blank, length );
+	return mlt_playlist_virtual_append( this, &this->blank, 0, fout );
+}
+
+/** Insert a producer into the playlist.
+*/
+
+int mlt_playlist_insert( mlt_playlist this, mlt_producer producer, int where, mlt_timecode in, mlt_timecode out )
+{
+	return 0;
+}
+
+int mlt_playlist_remove( mlt_playlist this, int where )
+{
+	return 0;
+}
+
+int mlt_playlist_move( mlt_playlist this, int from, int to )
+{
+	return 0;
+}
+
+int mlt_playlist_resize_clip( mlt_playlist this, int clip, mlt_timecode in, mlt_timecode out )
+{
+	int error = clip < 0 || clip >= this->count;
+	if ( error == 0 )
+	{
+		playlist_entry *entry = this->list[ clip ];
+		mlt_producer producer = entry->producer;
+
+		if ( in <= -1 )
+			in = 0;
+		if ( out <= -1 || out >= mlt_producer_get_out( producer ) )
+			out = mlt_producer_get_out( producer );
+
+		if ( out < in )
+		{
+			mlt_timecode t = in;
+			in = out;
+			out = t;
+		}
+
+		int64_t fin = mlt_producer_frame_position( producer, in );
+		int64_t fout = mlt_producer_frame_position( producer, out );
+
+		entry->frame_in = fin;
+		entry->frame_out = fout;
+		entry->frame_count = fout - fin + 1;
+		entry->playtime = out - in;
+		mlt_playlist_virtual_refresh( this );
+	}
+	return error;
+}
+
+/** 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 );
 }