+ int result = this == NULL ? -1 : 0;
+ if ( !result )
+ {
+ if ( position >= 0 && position < mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( this ) ) )
+ {
+ int clip = mlt_playlist_get_clip_index_at( this, position );
+ mlt_playlist_clip_info info;
+ mlt_playlist_get_clip_info( this, &info, clip );
+ if ( left && position != info.start )
+ mlt_playlist_split( this, clip, position - info.start - 1 );
+ else if ( !left )
+ mlt_playlist_split( this, clip, position - info.start );
+ result = position;
+ }
+ else if ( position <= 0 )
+ {
+ result = 0;
+ }
+ else
+ {
+ result = mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( this ) );
+ }
+ }
+ return result;
+}
+
+/** Join 1 or more consecutive clips.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the starting playlist entry index
+ * \param count the number of entries to merge
+ * \param merge ignored
+ * \return true if there was an error
+ */
+
+int mlt_playlist_join( mlt_playlist this, int clip, int count, int merge )
+{
+ int error = clip < 0 || clip >= this->count;
+ if ( error == 0 )
+ {
+ int i = clip;
+ mlt_playlist new_clip = mlt_playlist_init( );
+ mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
+ if ( clip + count >= this->count )
+ count = this->count - clip - 1;
+ for ( i = 0; i <= count; i ++ )
+ {
+ playlist_entry *entry = this->list[ clip ];
+ mlt_playlist_append( new_clip, entry->producer );
+ mlt_playlist_repeat_clip( new_clip, i, entry->repeat );
+ entry->preservation_hack = 1;
+ mlt_playlist_remove( this, clip );
+ }
+ mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
+ mlt_playlist_insert( this, MLT_PLAYLIST_PRODUCER( new_clip ), clip, 0, -1 );
+ mlt_playlist_close( new_clip );
+ }
+ return error;
+}
+
+/** Mix consecutive clips for a specified length and apply transition if specified.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \param length the number of frames over which to create the mix
+ * \param transition the transition to use for the mix
+ * \return true if there was an error
+ */
+
+int mlt_playlist_mix( mlt_playlist this, int clip, int length, mlt_transition transition )
+{
+ int error = ( clip < 0 || clip + 1 >= this->count );
+ if ( error == 0 )
+ {
+ playlist_entry *clip_a = this->list[ clip ];
+ playlist_entry *clip_b = this->list[ clip + 1 ];
+ mlt_producer track_a = NULL;
+ mlt_producer track_b = NULL;
+ mlt_tractor tractor = mlt_tractor_new( );
+ mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
+
+ // Check length is valid for both clips and resize if necessary.
+ int max_size = clip_a->frame_count > clip_b->frame_count ? clip_a->frame_count : clip_b->frame_count;
+ length = length > max_size ? max_size : length;
+
+ // Create the a and b tracks/cuts if necessary - note that no cuts are required if the length matches
+ if ( length != clip_a->frame_count )
+ track_a = mlt_producer_cut( clip_a->producer, clip_a->frame_out - length + 1, clip_a->frame_out );
+ else
+ track_a = clip_a->producer;
+
+ if ( length != clip_b->frame_count )
+ track_b = mlt_producer_cut( clip_b->producer, clip_b->frame_in, clip_b->frame_in + length - 1 );
+ else
+ track_b = clip_b->producer;
+
+ // Set the tracks on the tractor
+ mlt_tractor_set_track( tractor, track_a, 0 );
+ mlt_tractor_set_track( tractor, track_b, 1 );
+
+ // Insert the mix object into the playlist
+ mlt_playlist_insert( this, MLT_TRACTOR_PRODUCER( tractor ), clip + 1, -1, -1 );
+ mlt_properties_set_data( MLT_TRACTOR_PROPERTIES( tractor ), "mlt_mix", tractor, 0, NULL, NULL );
+
+ // Attach the transition
+ if ( transition != NULL )
+ {
+ mlt_field field = mlt_tractor_field( tractor );
+ mlt_field_plant_transition( field, transition, 0, 1 );
+ mlt_transition_set_in_and_out( transition, 0, length - 1 );
+ }
+
+ // Close our references to the tracks if we created new cuts above (the tracks can still be used here)
+ if ( track_a != clip_a->producer )
+ mlt_producer_close( track_a );
+ if ( track_b != clip_b->producer )
+ mlt_producer_close( track_b );
+
+ // Check if we have anything left on the right hand clip
+ if ( track_b == clip_b->producer )
+ {
+ clip_b->preservation_hack = 1;
+ mlt_playlist_remove( this, clip + 2 );
+ }
+ else if ( clip_b->frame_out - clip_b->frame_in > length )
+ {
+ mlt_playlist_resize_clip( this, clip + 2, clip_b->frame_in + length, clip_b->frame_out );
+ mlt_properties_set_data( MLT_PRODUCER_PROPERTIES( clip_b->producer ), "mix_in", tractor, 0, NULL, NULL );
+ mlt_properties_set_data( MLT_TRACTOR_PROPERTIES( tractor ), "mix_out", clip_b->producer, 0, NULL, NULL );
+ }
+ else
+ {
+ mlt_producer_clear( clip_b->producer );
+ mlt_playlist_remove( this, clip + 2 );
+ }
+
+ // Check if we have anything left on the left hand clip
+ if ( track_a == clip_a->producer )
+ {
+ clip_a->preservation_hack = 1;
+ mlt_playlist_remove( this, clip );
+ }
+ else if ( clip_a->frame_out - clip_a->frame_in > length )
+ {
+ mlt_playlist_resize_clip( this, clip, clip_a->frame_in, clip_a->frame_out - length );
+ mlt_properties_set_data( MLT_PRODUCER_PROPERTIES( clip_a->producer ), "mix_out", tractor, 0, NULL, NULL );
+ mlt_properties_set_data( MLT_TRACTOR_PROPERTIES( tractor ), "mix_in", clip_a->producer, 0, NULL, NULL );
+ }
+ else
+ {
+ mlt_producer_clear( clip_a->producer );
+ mlt_playlist_remove( this, clip );
+ }
+
+ // Unblock and force a fire off of change events to listeners
+ mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
+ mlt_playlist_virtual_refresh( this );
+ mlt_tractor_close( tractor );
+ }
+ return error;
+}
+
+/** Add a transition to an existing mix.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \param transition a transition
+ * \return true if there was an error
+ */
+
+int mlt_playlist_mix_add( mlt_playlist this, int clip, mlt_transition transition )
+{
+ mlt_producer producer = mlt_producer_cut_parent( mlt_playlist_get_clip( this, clip ) );
+ mlt_properties properties = producer != NULL ? MLT_PRODUCER_PROPERTIES( producer ) : NULL;
+ mlt_tractor tractor = properties != NULL ? mlt_properties_get_data( properties, "mlt_mix", NULL ) : NULL;
+ int error = transition == NULL || tractor == NULL;
+ if ( error == 0 )
+ {
+ mlt_field field = mlt_tractor_field( tractor );
+ mlt_field_plant_transition( field, transition, 0, 1 );
+ mlt_transition_set_in_and_out( transition, 0, this->list[ clip ]->frame_count - 1 );
+ }
+ return error;
+}
+
+/** Return the clip at the clip index.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of a playlist entry
+ * \return a producer or NULL if there was an error
+ */
+
+mlt_producer mlt_playlist_get_clip( mlt_playlist this, int clip )
+{
+ if ( clip >= 0 && clip < this->count )
+ return this->list[ clip ]->producer;
+ return NULL;
+}
+
+/** Return the clip at the specified position.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param position a time relative to the beginning of the playlist
+ * \return a producer or NULL if not found
+ */
+
+mlt_producer mlt_playlist_get_clip_at( mlt_playlist this, mlt_position position )
+{
+ int index = 0, total = 0;
+ return mlt_playlist_locate( this, &position, &index, &total );
+}
+
+/** Return the clip index of the specified position.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param position a time relative to the beginning of the playlist
+ * \return the index of the playlist entry
+ */
+
+int mlt_playlist_get_clip_index_at( mlt_playlist this, mlt_position position )
+{
+ int index = 0, total = 0;
+ mlt_playlist_locate( this, &position, &index, &total );
+ return index;
+}
+
+/** Determine if the clip is a mix.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \return true if the producer is a mix
+ */
+
+int mlt_playlist_clip_is_mix( mlt_playlist this, int clip )
+{
+ mlt_producer producer = mlt_producer_cut_parent( mlt_playlist_get_clip( this, clip ) );
+ mlt_properties properties = producer != NULL ? MLT_PRODUCER_PROPERTIES( producer ) : NULL;
+ mlt_tractor tractor = properties != NULL ? mlt_properties_get_data( properties, "mlt_mix", NULL ) : NULL;
+ return tractor != NULL;
+}
+
+/** Remove a mixed clip - ensure that the cuts included in the mix find their way
+ * back correctly on to the playlist.
+ *
+ * \private \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \return true if there was an error
+ */
+
+static int mlt_playlist_unmix( mlt_playlist this, int clip )
+{
+ int error = ( clip < 0 || clip >= this->count );
+
+ // Ensure that the clip request is actually a mix
+ if ( error == 0 )
+ {
+ mlt_producer producer = mlt_producer_cut_parent( this->list[ clip ]->producer );
+ mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
+ error = mlt_properties_get_data( properties, "mlt_mix", NULL ) == NULL ||
+ this->list[ clip ]->preservation_hack;
+ }
+
+ if ( error == 0 )
+ {
+ playlist_entry *mix = this->list[ clip ];
+ mlt_tractor tractor = ( mlt_tractor )mlt_producer_cut_parent( mix->producer );
+ mlt_properties properties = MLT_TRACTOR_PROPERTIES( tractor );
+ mlt_producer clip_a = mlt_properties_get_data( properties, "mix_in", NULL );
+ mlt_producer clip_b = mlt_properties_get_data( properties, "mix_out", NULL );
+ int length = mlt_producer_get_playtime( MLT_TRACTOR_PRODUCER( tractor ) );
+ mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
+
+ if ( clip_a != NULL )
+ {
+ mlt_producer_set_in_and_out( clip_a, mlt_producer_get_in( clip_a ), mlt_producer_get_out( clip_a ) + length );
+ }
+ else
+ {
+ mlt_producer cut = mlt_tractor_get_track( tractor, 0 );
+ mlt_playlist_insert( this, cut, clip, -1, -1 );
+ clip ++;
+ }
+
+ if ( clip_b != NULL )
+ {
+ mlt_producer_set_in_and_out( clip_b, mlt_producer_get_in( clip_b ) - length, mlt_producer_get_out( clip_b ) );
+ }
+ else
+ {
+ mlt_producer cut = mlt_tractor_get_track( tractor, 1 );
+ mlt_playlist_insert( this, cut, clip + 1, -1, -1 );
+ }
+
+ mlt_properties_set_data( properties, "mlt_mix", NULL, 0, NULL, NULL );
+ mlt_playlist_remove( this, clip );
+ mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
+ mlt_playlist_virtual_refresh( this );
+ }
+ return error;
+}
+
+/** Resize a mix clip.
+ *
+ * \private \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \param in the new starting point
+ * \param out the new ending point
+ * \return true if there was an error
+ */
+
+static int mlt_playlist_resize_mix( mlt_playlist this, int clip, int in, int out )
+{
+ int error = ( clip < 0 || clip >= this->count );
+
+ // Ensure that the clip request is actually a mix
+ if ( error == 0 )
+ {
+ mlt_producer producer = mlt_producer_cut_parent( this->list[ clip ]->producer );
+ mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
+ error = mlt_properties_get_data( properties, "mlt_mix", NULL ) == NULL;
+ }
+
+ if ( error == 0 )
+ {
+ playlist_entry *mix = this->list[ clip ];
+ mlt_tractor tractor = ( mlt_tractor )mlt_producer_cut_parent( mix->producer );
+ mlt_properties properties = MLT_TRACTOR_PROPERTIES( tractor );
+ mlt_producer clip_a = mlt_properties_get_data( properties, "mix_in", NULL );
+ mlt_producer clip_b = mlt_properties_get_data( properties, "mix_out", NULL );
+ mlt_producer track_a = mlt_tractor_get_track( tractor, 0 );
+ mlt_producer track_b = mlt_tractor_get_track( tractor, 1 );
+ int length = out - in + 1;
+ int length_diff = length - mlt_producer_get_playtime( MLT_TRACTOR_PRODUCER( tractor ) );
+ mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
+
+ if ( clip_a != NULL )
+ mlt_producer_set_in_and_out( clip_a, mlt_producer_get_in( clip_a ), mlt_producer_get_out( clip_a ) - length_diff );
+
+ if ( clip_b != NULL )
+ mlt_producer_set_in_and_out( clip_b, mlt_producer_get_in( clip_b ) + length_diff, mlt_producer_get_out( clip_b ) );
+
+ mlt_producer_set_in_and_out( track_a, mlt_producer_get_in( track_a ) - length_diff, mlt_producer_get_out( track_a ) );
+ mlt_producer_set_in_and_out( track_b, mlt_producer_get_in( track_b ), mlt_producer_get_out( track_b ) + length_diff );
+ mlt_producer_set_in_and_out( MLT_MULTITRACK_PRODUCER( mlt_tractor_multitrack( tractor ) ), in, out );
+ mlt_producer_set_in_and_out( MLT_TRACTOR_PRODUCER( tractor ), in, out );
+ mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( mix->producer ), "length", out - in + 1 );
+ mlt_producer_set_in_and_out( mix->producer, in, out );
+
+ mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
+ mlt_playlist_virtual_refresh( this );
+ }
+ return error;
+}
+
+/** Consolidate adjacent blank producers.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param keep_length set false to remove the last entry if it is blank
+ */
+
+void mlt_playlist_consolidate_blanks( mlt_playlist this, int keep_length )
+{
+ if ( this != NULL )
+ {
+ int i = 0;
+ mlt_properties properties = MLT_PLAYLIST_PROPERTIES( this );
+
+ mlt_events_block( properties, properties );
+ for ( i = 1; i < this->count; i ++ )
+ {
+ playlist_entry *left = this->list[ i - 1 ];
+ playlist_entry *right = this->list[ i ];
+
+ if ( mlt_producer_is_blank( left->producer ) && mlt_producer_is_blank( right->producer ) )
+ {
+ mlt_playlist_resize_clip( this, i - 1, 0, left->frame_count + right->frame_count - 1 );
+ mlt_playlist_remove( this, i -- );
+ }
+ }
+
+ if ( !keep_length && this->count > 0 )
+ {
+ playlist_entry *last = this->list[ this->count - 1 ];
+ if ( mlt_producer_is_blank( last->producer ) )
+ mlt_playlist_remove( this, this->count - 1 );
+ }
+
+ mlt_events_unblock( properties, properties );
+ mlt_playlist_virtual_refresh( this );
+ }
+}
+
+/** Determine if the specified clip index is a blank.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \return true if there was an error
+ */
+
+int mlt_playlist_is_blank( mlt_playlist this, int clip )
+{
+ return this == NULL || mlt_producer_is_blank( mlt_playlist_get_clip( this, clip ) );
+}
+
+/** Determine if the specified position is a blank.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param position a time relative to the start or end (negative) of the playlist
+ * \return true if there was an error
+ */
+
+int mlt_playlist_is_blank_at( mlt_playlist this, mlt_position position )
+{
+ return this == NULL || mlt_producer_is_blank( mlt_playlist_get_clip_at( this, position ) );
+}
+
+/** Replace the specified clip with a blank and return the clip.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \return a producer or NULL if there was an error
+ */
+
+mlt_producer mlt_playlist_replace_with_blank( mlt_playlist this, int clip )
+{
+ mlt_producer producer = NULL;
+ if ( !mlt_playlist_is_blank( this, clip ) )
+ {
+ playlist_entry *entry = this->list[ clip ];
+ int in = entry->frame_in;
+ int out = entry->frame_out;
+ mlt_properties properties = MLT_PLAYLIST_PROPERTIES( this );
+ producer = entry->producer;
+ mlt_properties_inc_ref( MLT_PRODUCER_PROPERTIES( producer ) );
+ mlt_events_block( properties, properties );
+ mlt_playlist_remove( this, clip );
+ mlt_playlist_blank( this, out - in );
+ mlt_playlist_move( this, this->count - 1, clip );
+ mlt_events_unblock( properties, properties );
+ mlt_playlist_virtual_refresh( this );
+ mlt_producer_set_in_and_out( producer, in, out );
+ }
+ return producer;
+}
+
+/** Insert blank space.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the new blank section
+ * \param length the ending time of the new blank section (duration - 1)
+ */
+
+void mlt_playlist_insert_blank( mlt_playlist this, int clip, int length )
+{
+ if ( this != NULL && length >= 0 )
+ {
+ mlt_properties properties = MLT_PLAYLIST_PROPERTIES( this );
+ mlt_events_block( properties, properties );
+ mlt_playlist_blank( this, length );
+ mlt_playlist_move( this, this->count - 1, clip );
+ mlt_events_unblock( properties, properties );
+ mlt_playlist_virtual_refresh( this );
+ }
+}
+
+/** Resize a blank entry.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param position the time at which the blank entry exists relative to the start or end (negative) of the playlist.
+ * \param length the additional amount of blank frames to add
+ * \param find true to fist locate the blank after the clip at position
+ */
+void mlt_playlist_pad_blanks( mlt_playlist this, mlt_position position, int length, int find )
+{
+ if ( this != NULL && length != 0 )
+ {
+ int clip = mlt_playlist_get_clip_index_at( this, position );
+ mlt_properties properties = MLT_PLAYLIST_PROPERTIES( this );
+ mlt_events_block( properties, properties );
+ if ( find && clip < this->count && !mlt_playlist_is_blank( this, clip ) )
+ clip ++;
+ if ( clip < this->count && mlt_playlist_is_blank( this, clip ) )
+ {
+ mlt_playlist_clip_info info;
+ mlt_playlist_get_clip_info( this, &info, clip );
+ if ( info.frame_out + length > info.frame_in )
+ mlt_playlist_resize_clip( this, clip, info.frame_in, info.frame_out + length );
+ else
+ mlt_playlist_remove( this, clip );
+ }
+ else if ( find && clip < this->count && length > 0 )
+ {
+ mlt_playlist_insert_blank( this, clip, length );
+ }
+ mlt_events_unblock( properties, properties );
+ mlt_playlist_virtual_refresh( this );
+ }
+}
+
+/** Insert a clip at a specific time.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param position the time at which to insert
+ * \param producer the producer to insert
+ * \param mode true if you want to overwrite any blank section
+ * \return true if there was an error
+ */
+
+int mlt_playlist_insert_at( mlt_playlist this, mlt_position position, mlt_producer producer, int mode )
+{
+ int ret = this == NULL || position < 0 || producer == NULL;
+ if ( ret == 0 )
+ {
+ mlt_properties properties = MLT_PLAYLIST_PROPERTIES( this );
+ int length = mlt_producer_get_playtime( producer );
+ int clip = mlt_playlist_get_clip_index_at( this, position );
+ mlt_playlist_clip_info info;
+ mlt_playlist_get_clip_info( this, &info, clip );
+ mlt_events_block( properties, this );
+ if ( clip < this->count && mlt_playlist_is_blank( this, clip ) )
+ {
+ // Split and move to new clip if need be
+ if ( position != info.start && mlt_playlist_split( this, clip, position - info.start - 1 ) == 0 )
+ mlt_playlist_get_clip_info( this, &info, ++ clip );
+
+ // Split again if need be
+ if ( length < info.frame_count )
+ mlt_playlist_split( this, clip, length - 1 );
+
+ // Remove
+ mlt_playlist_remove( this, clip );
+
+ // Insert
+ mlt_playlist_insert( this, producer, clip, -1, -1 );
+ ret = clip;
+ }
+ else if ( clip < this->count )
+ {
+ if ( position > info.start + info.frame_count / 2 )
+ clip ++;
+ if ( mode == 1 && clip < this->count && mlt_playlist_is_blank( this, clip ) )
+ {
+ mlt_playlist_get_clip_info( this, &info, clip );
+ if ( length < info.frame_count )
+ mlt_playlist_split( this, clip, length );
+ mlt_playlist_remove( this, clip );
+ }
+ mlt_playlist_insert( this, producer, clip, -1, -1 );
+ ret = clip;
+ }
+ else
+ {
+ if ( mode == 1 ) {
+ if ( position == info.start )
+ mlt_playlist_remove( this, clip );
+ else
+ mlt_playlist_blank( this, position - mlt_properties_get_int( properties, "length" ) - 1 );
+ }
+ mlt_playlist_append( this, producer );
+ ret = this->count - 1;
+ }
+ mlt_events_unblock( properties, this );
+ mlt_playlist_virtual_refresh( this );
+ }
+ else
+ {
+ ret = -1;
+ }
+ return ret;
+}
+
+/** Get the time at which the clip starts relative to the playlist.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \return the starting time
+ */
+
+int mlt_playlist_clip_start( mlt_playlist this, int clip )
+{
+ mlt_playlist_clip_info info;
+ if ( mlt_playlist_get_clip_info( this, &info, clip ) == 0 )
+ return info.start;
+ return clip < 0 ? 0 : mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( this ) );
+}
+
+/** Get the playable duration of the clip.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \return the duration of the playlist entry
+ */
+
+int mlt_playlist_clip_length( mlt_playlist this, int clip )
+{
+ mlt_playlist_clip_info info;
+ if ( mlt_playlist_get_clip_info( this, &info, clip ) == 0 )
+ return info.frame_count;
+ return 0;
+}
+
+/** Get the duration of a blank space.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param clip the index of the playlist entry
+ * \param bounded the maximum number of blank entries or 0 for all
+ * \return the duration of a blank section
+ */
+
+int mlt_playlist_blanks_from( mlt_playlist this, int clip, int bounded )
+{
+ int count = 0;
+ mlt_playlist_clip_info info;
+ if ( this != NULL && clip < this->count )
+ {
+ mlt_playlist_get_clip_info( this, &info, clip );
+ if ( mlt_playlist_is_blank( this, clip ) )
+ count += info.frame_count;
+ if ( bounded == 0 )
+ bounded = this->count;
+ for ( clip ++; clip < this->count && bounded >= 0; clip ++ )
+ {
+ mlt_playlist_get_clip_info( this, &info, clip );
+ if ( mlt_playlist_is_blank( this, clip ) )
+ count += info.frame_count;
+ else
+ bounded --;
+ }
+ }
+ return count;
+}
+
+/** Remove a portion of the playlist by time.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ * \param position the starting time
+ * \param length the duration of time to remove
+ * \return the new entry index at the position
+ */
+
+int mlt_playlist_remove_region( mlt_playlist this, mlt_position position, int length )
+{
+ int index = mlt_playlist_get_clip_index_at( this, position );
+ if ( index >= 0 && index < this->count )
+ {
+ mlt_properties properties = MLT_PLAYLIST_PROPERTIES( this );
+ int clip_start = mlt_playlist_clip_start( this, index );
+ int list_length = mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( this ) );
+ mlt_events_block( properties, this );
+
+ if ( position + length > list_length )
+ length -= ( position + length - list_length );
+
+ if ( clip_start < position )
+ {
+ mlt_playlist_split( this, index ++, position - clip_start - 1 );
+ }
+
+ while( length >= 0 )
+ {
+ if ( mlt_playlist_clip_length( this, index ) > length )
+ mlt_playlist_split( this, index, length - 1 );
+ length -= mlt_playlist_clip_length( this, index );
+ mlt_playlist_remove( this, index );
+ }
+
+ mlt_playlist_consolidate_blanks( this, 0 );
+ mlt_events_unblock( properties, this );
+ mlt_playlist_virtual_refresh( this );
+
+ // Just to be sure, we'll get the clip index again...
+ index = mlt_playlist_get_clip_index_at( this, position );
+ }
+ return index;
+}
+
+/** Not implemented
+ *
+ * \deprecated not implemented
+ * \public \memberof mlt_playlist_s
+ * \param this
+ * \param position
+ * \param length
+ * \param new_position
+ * \return
+ */
+
+int mlt_playlist_move_region( mlt_playlist this, mlt_position position, int length, int new_position )
+{
+ if ( this != NULL )
+ {
+ }
+ return 0;
+}
+
+/** Get the current frame.
+ *
+ * The implementation of the get_frame virtual function.
+ * \private \memberof mlt_playlist_s
+ * \param producer a producer
+ * \param frame a frame by reference
+ * \param index the time at which to get the frame
+ * \return false
+ */
+
+static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
+{
+ // Check that we have a producer
+ if ( producer == NULL )
+ {
+ *frame = NULL;
+ return -1;
+ }
+
+ // Get this mlt_playlist
+ mlt_playlist this = producer->child;
+
+ // Need to ensure the frame is deinterlaced when repeating 1 frame
+ int progressive = 0;
+
+ // Get the real producer
+ mlt_service real = mlt_playlist_virtual_seek( this, &progressive );
+
+ // Check that we have a producer
+ if ( real == NULL )
+ {
+ *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
+ return 0;
+ }
+
+ // Get the frame
+ if ( !mlt_properties_get_int( MLT_SERVICE_PROPERTIES( real ), "meta.fx_cut" ) )
+ {
+ mlt_service_get_frame( real, frame, index );
+ }
+ else
+ {
+ mlt_producer parent = mlt_producer_cut_parent( ( mlt_producer )real );
+ *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( parent ) );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "fx_cut", 1 );
+ mlt_frame_push_service( *frame, NULL );
+ mlt_frame_push_audio( *frame, NULL );
+ mlt_service_apply_filters( MLT_PRODUCER_SERVICE( parent ), *frame, 0 );
+ mlt_service_apply_filters( real, *frame, 0 );
+ mlt_deque_pop_front( MLT_FRAME_IMAGE_STACK( *frame ) );
+ mlt_deque_pop_front( MLT_FRAME_AUDIO_STACK( *frame ) );
+ }
+
+ // 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 );
+
+ // Set the consumer progressive property
+ if ( progressive )
+ {
+ mlt_properties_set_int( properties, "consumer_deinterlace", progressive );
+ mlt_properties_set_int( properties, "test_audio", 1 );
+ }
+
+ // 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 position on the frame we're creating
+ mlt_frame_set_position( *frame, mlt_producer_frame( producer ) );
+
+ // Position ourselves on the next frame
+ mlt_producer_prepare_next( producer );
+
+ return 0;
+}
+
+/** Close the playlist.
+ *
+ * \public \memberof mlt_playlist_s
+ * \param this a playlist
+ */
+
+void mlt_playlist_close( mlt_playlist this )
+{
+ if ( this != NULL && mlt_properties_dec_ref( MLT_PLAYLIST_PROPERTIES( this ) ) <= 0 )
+ {
+ int i = 0;
+ this->parent.close = NULL;
+ for ( i = 0; i < this->count; i ++ )
+ {
+ mlt_event_close( this->list[ i ]->event );
+ mlt_producer_close( this->list[ i ]->producer );
+ free( this->list[ i ] );
+ }
+ mlt_producer_close( &this->blank );
+ mlt_producer_close( &this->parent );
+ free( this->list );
+ free( this );
+ }