X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fframework%2Fmlt_service.c;h=aedc6effb96801d71a6f0b748da4e20b13dc21b2;hb=bf3264b9e340ba5c11cbf59835a8af3db94e0cc2;hp=6df363064cebcd5534d3c38c35bd2fc9002ef665;hpb=909d149697331a560edb1924f58fc58c5a25aaea;p=melted diff --git a/src/framework/mlt_service.c b/src/framework/mlt_service.c index 6df3630..aedc6ef 100644 --- a/src/framework/mlt_service.c +++ b/src/framework/mlt_service.c @@ -3,27 +3,29 @@ * Copyright (C) 2003-2004 Ushodaya Enterprises Limited * Author: Charles Yates * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. * - * This program is distributed in the hope that it will be useful, + * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" #include "mlt_service.h" +#include "mlt_filter.h" #include "mlt_frame.h" #include #include #include +#include /** IMPORTANT NOTES @@ -44,6 +46,10 @@ typedef struct int count; mlt_service *in; mlt_service out; + int filter_count; + int filter_size; + mlt_filter *filters; + pthread_mutex_t mutex; } mlt_service_base; @@ -82,7 +88,9 @@ int mlt_service_init( mlt_service this, void *child ) this->parent.close_object = this; mlt_events_init( &this->parent ); + mlt_events_register( &this->parent, "service-changed", NULL ); mlt_events_register( &this->parent, "property-changed", ( mlt_transmitter )mlt_service_property_changed ); + pthread_mutex_init( &( ( mlt_service_base * )this->local )->mutex, NULL ); } return error; @@ -94,6 +102,50 @@ static void mlt_service_property_changed( mlt_listener listener, mlt_properties listener( owner, this, ( char * )args[ 0 ] ); } +void mlt_service_lock( mlt_service this ) +{ + if ( this != NULL ) + pthread_mutex_lock( &( ( mlt_service_base * )this->local )->mutex ); +} + +void mlt_service_unlock( mlt_service this ) +{ + if ( this != NULL ) + pthread_mutex_unlock( &( ( mlt_service_base * )this->local )->mutex ); +} + +mlt_service_type mlt_service_identify( mlt_service this ) +{ + mlt_service_type type = invalid_type; + if ( this != NULL ) + { + mlt_properties properties = MLT_SERVICE_PROPERTIES( this ); + char *mlt_type = mlt_properties_get( properties, "mlt_type" ); + char *resource = mlt_properties_get( properties, "resource" ); + if ( mlt_type == NULL ) + type = unknown_type; + else if ( resource == NULL || !strcmp( resource, "" ) ) + type = producer_type; + else if ( !strcmp( resource, "" ) ) + type = playlist_type; + else if ( !strcmp( resource, "" ) ) + type = tractor_type; + else if ( !strcmp( resource, "" ) ) + type = multitrack_type; + else if ( !strcmp( mlt_type, "producer" ) ) + type = producer_type; + else if ( !strcmp( mlt_type, "filter" ) ) + type = filter_type; + else if ( !strcmp( mlt_type, "transition" ) ) + type = transition_type; + else if ( !strcmp( mlt_type, "consumer" ) ) + type = consumer_type; + else + type = unknown_type; + } + return type; +} + /** Connect a producer service. Returns: > 0 warning, == 0 success, < 0 serious error 1 = this service does not accept input @@ -108,6 +160,11 @@ int mlt_service_connect_producer( mlt_service this, mlt_service producer, int in // Get the service base mlt_service_base *base = this->local; + // Special case 'track' index - only works for last filter(s) in a particular chain + // but allows a filter to apply to the output frame regardless of which track it comes from + if ( index == -1 ) + index = 0; + // Check if the producer is already registered with this service for ( i = 0; i < base->count; i ++ ) if ( base->in[ i ] == producer ) @@ -134,7 +191,11 @@ int mlt_service_connect_producer( mlt_service this, mlt_service producer, int in // Increment the reference count on this producer if ( producer != NULL ) - mlt_properties_inc_ref( mlt_service_properties( producer ) ); + { + mlt_service_lock( producer ); + mlt_properties_inc_ref( MLT_SERVICE_PROPERTIES( producer ) ); + mlt_service_unlock( producer ); + } // Now we disconnect the producer service from its consumer mlt_service_disconnect( producer ); @@ -255,15 +316,177 @@ mlt_properties mlt_service_properties( mlt_service self ) return self != NULL ? &self->parent : NULL; } +/** Recursively apply attached filters +*/ + +void mlt_service_apply_filters( mlt_service this, mlt_frame frame, int index ) +{ + int i; + mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame ); + mlt_properties service_properties = MLT_SERVICE_PROPERTIES( this ); + mlt_service_base *base = this->local; + mlt_position position = mlt_frame_get_position( frame ); + mlt_position this_in = mlt_properties_get_position( service_properties, "in" ); + mlt_position this_out = mlt_properties_get_position( service_properties, "out" ); + + if ( index == 0 || mlt_properties_get_int( service_properties, "_filter_private" ) == 0 ) + { + // Process the frame with the attached filters + for ( i = 0; i < base->filter_count; i ++ ) + { + if ( base->filters[ i ] != NULL ) + { + mlt_position in = mlt_filter_get_in( base->filters[ i ] ); + mlt_position out = mlt_filter_get_out( base->filters[ i ] ); + int disable = mlt_properties_get_int( MLT_FILTER_PROPERTIES( base->filters[ i ] ), "disable" ); + if ( !disable && ( ( in == 0 && out == 0 ) || ( position >= in && ( position <= out || out == 0 ) ) ) ) + { + mlt_properties_set_position( frame_properties, "in", in == 0 ? this_in : in ); + mlt_properties_set_position( frame_properties, "out", out == 0 ? this_out : out ); + mlt_filter_process( base->filters[ i ], frame ); + mlt_service_apply_filters( MLT_FILTER_SERVICE( base->filters[ i ] ), frame, index + 1 ); + } + } + } + } +} + /** Obtain a frame. */ int mlt_service_get_frame( mlt_service this, mlt_frame_ptr frame, int index ) { + int result = 0; + + // Lock the service + mlt_service_lock( this ); + + // Ensure that the frame is NULL + *frame = NULL; + + // Only process if we have a valid service + if ( this != NULL && this->get_frame != NULL ) + { + mlt_properties properties = MLT_SERVICE_PROPERTIES( this ); + mlt_position in = mlt_properties_get_position( properties, "in" ); + mlt_position out = mlt_properties_get_position( properties, "out" ); + + result = this->get_frame( this, frame, index ); + + if ( result == 0 ) + { + mlt_properties_inc_ref( properties ); + properties = MLT_FRAME_PROPERTIES( *frame ); + if ( in >=0 && out > 0 ) + { + mlt_properties_set_position( properties, "in", in ); + mlt_properties_set_position( properties, "out", out ); + } + mlt_service_apply_filters( this, *frame, 1 ); + mlt_deque_push_back( MLT_FRAME_SERVICE_STACK( *frame ), this ); + } + } + + // Make sure we return a frame + if ( *frame == NULL ) + *frame = mlt_frame_init( ); + + // Unlock the service + mlt_service_unlock( this ); + + return result; +} + +static void mlt_service_filter_changed( mlt_service owner, mlt_service this ) +{ + mlt_events_fire( MLT_SERVICE_PROPERTIES( this ), "service-changed", NULL ); +} + +/** Attach a filter. +*/ + +int mlt_service_attach( mlt_service this, mlt_filter filter ) +{ + int error = this == NULL || filter == NULL; + if ( error == 0 ) + { + int i = 0; + mlt_properties properties = MLT_SERVICE_PROPERTIES( this ); + mlt_service_base *base = this->local; + + for ( i = 0; error == 0 && i < base->filter_count; i ++ ) + if ( base->filters[ i ] == filter ) + error = 1; + + if ( error == 0 ) + { + if ( base->filter_count == base->filter_size ) + { + base->filter_size += 10; + base->filters = realloc( base->filters, base->filter_size * sizeof( mlt_filter ) ); + } + + if ( base->filters != NULL ) + { + mlt_properties props = MLT_FILTER_PROPERTIES( filter ); + mlt_properties_inc_ref( MLT_FILTER_PROPERTIES( filter ) ); + base->filters[ base->filter_count ++ ] = filter; + mlt_events_fire( properties, "service-changed", NULL ); + mlt_events_listen( props, this, "service-changed", ( mlt_listener )mlt_service_filter_changed ); + mlt_events_listen( props, this, "property-changed", ( mlt_listener )mlt_service_filter_changed ); + } + else + { + error = 2; + } + } + } + return error; +} + +/** Detach a filter. +*/ + +int mlt_service_detach( mlt_service this, mlt_filter filter ) +{ + int error = this == NULL || filter == NULL; + if ( error == 0 ) + { + int i = 0; + mlt_service_base *base = this->local; + mlt_properties properties = MLT_SERVICE_PROPERTIES( this ); + + for ( i = 0; i < base->filter_count; i ++ ) + if ( base->filters[ i ] == filter ) + break; + + if ( i < base->filter_count ) + { + base->filters[ i ] = NULL; + for ( i ++ ; i < base->filter_count; i ++ ) + base->filters[ i - 1 ] = base->filters[ i ]; + base->filter_count --; + mlt_events_disconnect( MLT_FILTER_PROPERTIES( filter ), this ); + mlt_filter_close( filter ); + mlt_events_fire( properties, "service-changed", NULL ); + } + } + return error; +} + +/** Retrieve a filter. +*/ + +mlt_filter mlt_service_filter( mlt_service this, int index ) +{ + mlt_filter filter = NULL; if ( this != NULL ) - return this->get_frame( this, frame, index ); - *frame = mlt_frame_init( ); - return 0; + { + mlt_service_base *base = this->local; + if ( index >= 0 && index < base->filter_count ) + filter = base->filters[ index ]; + } + return filter; } /** Close the service. @@ -271,8 +494,10 @@ int mlt_service_get_frame( mlt_service this, mlt_frame_ptr frame, int index ) void mlt_service_close( mlt_service this ) { - if ( this != NULL && mlt_properties_dec_ref( mlt_service_properties( this ) ) <= 0 ) + mlt_service_lock( this ); + if ( this != NULL && mlt_properties_dec_ref( MLT_SERVICE_PROPERTIES( this ) ) <= 0 ) { + mlt_service_unlock( this ); if ( this->close != NULL ) { this->close( this->close_object ); @@ -281,14 +506,24 @@ void mlt_service_close( mlt_service this ) { mlt_service_base *base = this->local; int i = 0; + int count = base->filter_count; + mlt_events_block( MLT_SERVICE_PROPERTIES( this ), this ); + while( count -- ) + mlt_service_detach( this, base->filters[ 0 ] ); + free( base->filters ); for ( i = 0; i < base->count; i ++ ) if ( base->in[ i ] != NULL ) mlt_service_close( base->in[ i ] ); + this->parent.close = NULL; free( base->in ); + pthread_mutex_destroy( &base->mutex ); free( base ); - this->parent.close = NULL; mlt_properties_close( &this->parent ); } } + else + { + mlt_service_unlock( this ); + } }