/usr/include/mlt/framework/mlt_service.h is in libmlt-dev 6.0.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | /**
* \file mlt_service.h
* \brief interface declaration for all service classes
* \see mlt_service_s
*
* Copyright (C) 2003-2015 Meltytech, LLC
*
* 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 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
* Lesser General Public License for more details.
*
* 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
*/
#ifndef MLT_SERVICE_H
#define MLT_SERVICE_H
#include "mlt_properties.h"
#include "mlt_types.h"
/** \brief Service abstract base class
*
* \extends mlt_properties
* The service is the base class for all of the interesting classes and
* plugins for MLT. A service can have multiple inputs connections to
* other services called its "producers" but only a single output to another
* service called its "consumer." A service that has both producer and
* consumer connections is called a filter. Any service can have zero or more
* filters "attached" to it. We call any collection of services and their
* connections a "service network," which is similar to what DirectShow calls
* a filter graph or what gstreamer calls an element pipeline.
*
* \event \em service-changed a filter was attached or detached or a transition was connected or disconnected
* \event \em property-changed
* \properties \em mlt_type identifies the subclass
* \properties \em _mlt_service_hidden a flag that indicates whether to hide the mlt_service
* \properties \em mlt_service is the name of the implementation of the service
* \properties \em resource is either the stream identifier or grandchild-class
* \properties \em in when to start, what is started is service-specific
* \properties \em out when to stop
* \properties \em _filter_private Set this on a service to ensure that attached filters are handled privately.
* See modules/core/filter_region.c and modules/core/filter_watermark.c for examples.
* \properties \em _profile stores the mlt_profile for a service
* \properties \em _unique_id is a unique identifier
* \properties \em _need_previous_next boolean that instructs producers to get
* preceding and following frames inside of \p mlt_service_get_frame
*/
struct mlt_service_s
{
struct mlt_properties_s parent; /**< \private A service extends properties. */
/** Get a frame of data (virtual function).
*
* \param mlt_producer a producer
* \param mlt_frame_ptr a frame pointer by reference
* \param int an index
* \return true if there was an error
*/
int ( *get_frame )( mlt_service self, mlt_frame_ptr frame, int index );
/** the destructor virtual function */
mlt_destructor close;
void *close_object; /**< the object supplied to the close virtual function */
void *local; /**< \private instance object */
void *child; /**< \private the object of a subclass */
};
#define MLT_SERVICE_PROPERTIES( service ) ( &( service )->parent )
extern int mlt_service_init( mlt_service self, void *child );
extern void mlt_service_lock( mlt_service self );
extern void mlt_service_unlock( mlt_service self );
extern mlt_service_type mlt_service_identify( mlt_service self );
extern int mlt_service_connect_producer( mlt_service self, mlt_service producer, int index );
extern int mlt_service_insert_producer( mlt_service self, mlt_service producer, int index );
extern int mlt_service_disconnect_producer( mlt_service self, int index );
extern mlt_service mlt_service_get_producer( mlt_service self );
extern int mlt_service_get_frame( mlt_service self, mlt_frame_ptr frame, int index );
extern mlt_properties mlt_service_properties( mlt_service self );
extern mlt_service mlt_service_consumer( mlt_service self );
extern mlt_service mlt_service_producer( mlt_service self );
extern int mlt_service_attach( mlt_service self, mlt_filter filter );
extern int mlt_service_detach( mlt_service self, mlt_filter filter );
extern void mlt_service_apply_filters( mlt_service self, mlt_frame frame, int index );
extern int mlt_service_filter_count( mlt_service self );
extern int mlt_service_move_filter( mlt_service self, int from, int to );
extern mlt_filter mlt_service_filter( mlt_service self, int index );
extern mlt_profile mlt_service_profile( mlt_service self );
extern void mlt_service_set_profile( mlt_service self, mlt_profile profile );
extern void mlt_service_close( mlt_service self );
extern void mlt_service_cache_put( mlt_service self, const char *name, void* data, int size, mlt_destructor destructor );
extern mlt_cache_item mlt_service_cache_get( mlt_service self, const char *name );
extern void mlt_service_cache_set_size( mlt_service self, const char *name, int size );
extern int mlt_service_cache_get_size( mlt_service self, const char *name );
extern void mlt_service_cache_purge( mlt_service self );
#endif
|