2008-02-16 00:11:25 +02:00
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/*
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2008-02-16 00:14:44 +02:00
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* filter layer
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2010-11-28 12:22:58 +02:00
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* Copyright (c) 2007 Bobby Bingham
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2008-02-16 00:11:25 +02:00
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2008-08-31 10:39:47 +03:00
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#ifndef AVFILTER_AVFILTER_H
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#define AVFILTER_AVFILTER_H
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2008-02-16 00:11:25 +02:00
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2012-12-11 04:13:43 +03:00
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/**
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* @file
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* @ingroup lavfi
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* external API header
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*/
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/**
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* @defgroup lavfi Libavfilter
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* @{
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*/
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2012-06-22 14:04:22 +03:00
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#include <stddef.h>
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2009-11-16 20:39:26 +02:00
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#include "libavutil/avutil.h"
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2012-10-24 22:54:24 +03:00
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#include "libavutil/dict.h"
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2012-11-28 10:41:07 +03:00
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#include "libavutil/frame.h"
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2011-06-04 15:34:27 +03:00
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#include "libavutil/log.h"
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2011-02-07 15:37:08 +02:00
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#include "libavutil/samplefmt.h"
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2011-06-04 15:12:08 +03:00
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#include "libavutil/pixfmt.h"
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2011-06-04 15:05:35 +03:00
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#include "libavutil/rational.h"
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2009-11-16 20:39:26 +02:00
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2011-12-31 18:20:10 +03:00
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#include "libavfilter/version.h"
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2008-08-08 21:43:38 +03:00
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/**
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2010-06-30 18:38:06 +03:00
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* Return the LIBAVFILTER_VERSION_INT constant.
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2008-08-08 21:43:38 +03:00
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*/
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unsigned avfilter_version(void);
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2009-11-18 19:15:17 +02:00
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/**
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2010-06-30 18:38:06 +03:00
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* Return the libavfilter build-time configuration.
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2009-11-18 19:15:17 +02:00
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*/
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2010-01-03 16:31:25 +02:00
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const char *avfilter_configuration(void);
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2009-11-18 19:15:17 +02:00
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/**
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2010-06-30 18:38:06 +03:00
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* Return the libavfilter license.
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2009-11-18 19:15:17 +02:00
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*/
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2010-01-03 16:31:25 +02:00
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const char *avfilter_license(void);
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2009-11-18 19:15:17 +02:00
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2008-02-16 00:11:25 +02:00
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typedef struct AVFilterContext AVFilterContext;
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typedef struct AVFilterLink AVFilterLink;
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typedef struct AVFilterPad AVFilterPad;
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2012-05-30 11:12:55 +03:00
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typedef struct AVFilterFormats AVFilterFormats;
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2008-02-16 00:11:25 +02:00
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2012-11-28 10:41:07 +03:00
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#if FF_API_AVFILTERBUFFER
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2008-02-16 00:11:25 +02:00
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/**
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2010-07-17 21:27:11 +03:00
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* A reference-counted buffer data type used by the filter system. Filters
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2008-02-16 00:11:25 +02:00
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* should not store pointers to this structure directly, but instead use the
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2010-08-07 04:15:19 +03:00
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* AVFilterBufferRef structure below.
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2008-02-16 00:11:25 +02:00
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*/
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2010-08-12 21:20:58 +03:00
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typedef struct AVFilterBuffer {
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2010-07-30 11:42:25 +03:00
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uint8_t *data[8]; ///< buffer data for each plane/channel
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2012-04-16 15:01:26 +03:00
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/**
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* pointers to the data planes/channels.
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*
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* For video, this should simply point to data[].
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*
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* For planar audio, each channel has a separate data pointer, and
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* linesize[0] contains the size of each channel buffer.
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* For packed audio, there is just one data pointer, and linesize[0]
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* contains the total size of the buffer for all channels.
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*
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* Note: Both data and extended_data will always be set, but for planar
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* audio with more channels that can fit in data, extended_data must be used
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* in order to access all channels.
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*/
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uint8_t **extended_data;
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2012-06-21 12:48:58 +03:00
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int linesize[8]; ///< number of bytes per line
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/** private data to be used by a custom free function */
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void *priv;
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/**
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* A pointer to the function to deallocate this buffer if the default
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* function is not sufficient. This could, for example, add the memory
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* back into a memory pool to be reused later without the overhead of
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* reallocating it from scratch.
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*/
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void (*free)(struct AVFilterBuffer *buf);
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int format; ///< media format
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int w, h; ///< width and height of the allocated buffer
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unsigned refcount; ///< number of references to this buffer
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2010-07-17 13:44:14 +03:00
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} AVFilterBuffer;
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2008-02-16 00:11:25 +02:00
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2010-07-17 21:55:56 +03:00
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#define AV_PERM_READ 0x01 ///< can read from the buffer
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#define AV_PERM_WRITE 0x02 ///< can write to the buffer
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#define AV_PERM_PRESERVE 0x04 ///< nobody else can overwrite the buffer
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#define AV_PERM_REUSE 0x08 ///< can output the buffer multiple times, with the same contents each time
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#define AV_PERM_REUSE2 0x10 ///< can output the buffer multiple times, modified each time
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2010-12-27 17:10:21 +02:00
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#define AV_PERM_NEG_LINESIZES 0x20 ///< the buffer requested can have negative linesizes
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2011-10-27 04:44:41 +03:00
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#define AV_PERM_ALIGN 0x40 ///< the buffer must be aligned
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2010-07-17 21:55:56 +03:00
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2011-10-27 04:45:02 +03:00
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#define AVFILTER_ALIGN 16 //not part of ABI
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2010-08-17 21:08:03 +03:00
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/**
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* Audio specific properties in a reference to an AVFilterBuffer. Since
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* AVFilterBufferRef is common to different media formats, audio specific
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* per reference properties must be separated out.
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*/
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typedef struct AVFilterBufferRefAudioProps {
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2011-11-25 15:51:57 +03:00
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uint64_t channel_layout; ///< channel layout of audio buffer
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2011-02-01 13:34:23 +02:00
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int nb_samples; ///< number of audio samples per channel
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2011-08-21 20:17:24 +03:00
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int sample_rate; ///< audio buffer sample rate
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2012-12-02 18:39:41 +03:00
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int channels; ///< number of channels (do not access directly)
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2010-08-17 21:08:03 +03:00
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} AVFilterBufferRefAudioProps;
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2010-08-11 14:06:04 +03:00
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/**
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* Video specific properties in a reference to an AVFilterBuffer. Since
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* AVFilterBufferRef is common to different media formats, video specific
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* per reference properties must be separated out.
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*/
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2010-08-12 21:20:58 +03:00
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typedef struct AVFilterBufferRefVideoProps {
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2010-08-11 14:06:04 +03:00
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int w; ///< image width
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int h; ///< image height
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2011-04-29 14:12:39 +03:00
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AVRational sample_aspect_ratio; ///< sample aspect ratio
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2010-08-11 14:06:04 +03:00
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int interlaced; ///< is frame interlaced
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int top_field_first; ///< field order
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2011-04-23 14:38:50 +03:00
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enum AVPictureType pict_type; ///< picture type of the frame
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2011-04-16 11:09:15 +03:00
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int key_frame; ///< 1 -> keyframe, 0-> not
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2012-09-05 05:41:22 +03:00
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int qp_table_linesize; ///< qp_table stride
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2012-09-07 14:00:47 +03:00
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int qp_table_size; ///< qp_table size
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2012-09-05 05:41:22 +03:00
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int8_t *qp_table; ///< array of Quantization Parameters
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2010-08-11 14:06:04 +03:00
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} AVFilterBufferRefVideoProps;
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2008-02-16 00:11:25 +02:00
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/**
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2010-07-17 13:44:14 +03:00
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* A reference to an AVFilterBuffer. Since filters can manipulate the origin of
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2010-08-07 04:15:27 +03:00
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* a buffer to, for example, crop image without any memcpy, the buffer origin
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2009-05-14 21:19:42 +03:00
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* and dimensions are per-reference properties. Linesize is also useful for
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2008-02-16 00:11:29 +02:00
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* image flipping, frame to field filters, etc, and so is also per-reference.
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2008-02-16 00:11:25 +02:00
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*
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2008-02-16 00:12:50 +02:00
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* TODO: add anything necessary for frame reordering
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2008-02-16 00:11:25 +02:00
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*/
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2010-08-12 21:20:58 +03:00
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typedef struct AVFilterBufferRef {
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2010-08-07 04:15:27 +03:00
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AVFilterBuffer *buf; ///< the buffer that this is a reference to
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2010-08-17 21:08:03 +03:00
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uint8_t *data[8]; ///< picture/audio data for each plane
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2012-04-16 15:01:26 +03:00
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/**
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* pointers to the data planes/channels.
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*
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* For video, this should simply point to data[].
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*
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* For planar audio, each channel has a separate data pointer, and
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* linesize[0] contains the size of each channel buffer.
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* For packed audio, there is just one data pointer, and linesize[0]
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* contains the total size of the buffer for all channels.
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*
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* Note: Both data and extended_data will always be set, but for planar
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* audio with more channels that can fit in data, extended_data must be used
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* in order to access all channels.
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*/
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uint8_t **extended_data;
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2012-06-21 12:48:58 +03:00
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int linesize[8]; ///< number of bytes per line
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AVFilterBufferRefVideoProps *video; ///< video buffer specific properties
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AVFilterBufferRefAudioProps *audio; ///< audio buffer specific properties
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/**
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* presentation timestamp. The time unit may change during
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* filtering, as it is specified in the link and the filter code
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* may need to rescale the PTS accordingly.
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*/
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int64_t pts;
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int64_t pos; ///< byte position in stream, -1 if unknown
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int format; ///< media format
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int perms; ///< permissions, see the AV_PERM_* flags
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enum AVMediaType type; ///< media type of buffer data
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2012-10-17 00:49:03 +03:00
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AVDictionary *metadata; ///< dictionary containing metadata key=value tags
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2010-08-07 04:15:19 +03:00
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} AVFilterBufferRef;
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2008-02-16 00:11:25 +02:00
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2010-07-07 21:23:54 +03:00
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/**
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2010-08-17 21:08:03 +03:00
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* Copy properties of src to dst, without copying the actual data
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2010-07-07 21:23:54 +03:00
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*/
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2012-11-28 10:41:07 +03:00
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attribute_deprecated
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2012-05-07 08:15:06 +03:00
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void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src);
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2010-07-07 21:23:54 +03:00
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2008-02-16 00:11:25 +02:00
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/**
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2010-08-07 04:15:27 +03:00
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* Add a new reference to a buffer.
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2010-08-20 17:19:55 +03:00
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*
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2010-08-07 04:15:27 +03:00
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* @param ref an existing reference to the buffer
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2008-02-16 00:14:44 +02:00
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* @param pmask a bitmask containing the allowable permissions in the new
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2008-02-16 00:13:40 +02:00
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* reference
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2010-08-07 04:15:27 +03:00
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* @return a new reference to the buffer with the same properties as the
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2008-02-16 00:13:40 +02:00
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* old, excluding any permissions denied by pmask
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2008-02-16 00:11:25 +02:00
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*/
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2012-11-28 10:41:07 +03:00
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attribute_deprecated
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2010-08-07 04:15:27 +03:00
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AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask);
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2008-02-16 00:11:25 +02:00
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/**
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2010-08-07 04:15:27 +03:00
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* Remove a reference to a buffer. If this is the last reference to the
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* buffer, the buffer itself is also automatically freed.
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2010-08-20 17:19:55 +03:00
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*
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2011-01-15 19:21:15 +02:00
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* @param ref reference to the buffer, may be NULL
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2012-04-16 09:17:25 +03:00
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*
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* @note it is recommended to use avfilter_unref_bufferp() instead of this
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* function
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2008-02-16 00:11:25 +02:00
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*/
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2012-11-28 10:41:07 +03:00
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attribute_deprecated
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2010-08-07 04:15:27 +03:00
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void avfilter_unref_buffer(AVFilterBufferRef *ref);
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2008-02-16 00:11:25 +02:00
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2012-04-16 09:17:25 +03:00
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/**
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* Remove a reference to a buffer and set the pointer to NULL.
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* If this is the last reference to the buffer, the buffer itself
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* is also automatically freed.
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*
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* @param ref pointer to the buffer reference
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*/
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2012-11-28 10:41:07 +03:00
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attribute_deprecated
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2012-04-16 09:17:25 +03:00
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void avfilter_unref_bufferp(AVFilterBufferRef **ref);
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2012-11-28 10:41:07 +03:00
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#endif
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2012-04-16 09:17:25 +03:00
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2012-12-02 18:39:41 +03:00
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/**
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* Get the number of channels of a buffer reference.
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*/
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2013-03-10 03:30:30 +03:00
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attribute_deprecated
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2012-12-02 18:39:41 +03:00
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int avfilter_ref_get_channels(AVFilterBufferRef *ref);
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2012-06-12 21:12:42 +03:00
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#if FF_API_AVFILTERPAD_PUBLIC
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2008-02-16 00:13:40 +02:00
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/**
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2008-02-16 00:14:44 +02:00
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* A filter pad used for either input or output.
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2012-05-09 21:27:00 +03:00
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*
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* See doc/filter_design.txt for details on how to implement the methods.
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2012-06-13 22:04:06 +03:00
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*
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* @warning this struct might be removed from public API.
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2012-06-12 21:12:42 +03:00
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* users should call avfilter_pad_get_name() and avfilter_pad_get_type()
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* to access the name and type fields; there should be no need to access
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* any other fields from outside of libavfilter.
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2008-02-16 00:13:40 +02:00
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*/
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2010-08-12 21:20:58 +03:00
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struct AVFilterPad {
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2008-02-16 00:11:25 +02:00
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/**
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2009-05-14 21:19:42 +03:00
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* Pad name. The name is unique among inputs and among outputs, but an
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* input may have the same name as an output. This may be NULL if this
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2008-02-16 00:13:40 +02:00
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* pad has no need to ever be referenced by name.
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2008-02-16 00:11:25 +02:00
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*/
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2008-02-16 00:14:41 +02:00
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const char *name;
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2008-02-16 00:11:25 +02:00
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/**
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2012-05-21 20:33:35 +03:00
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* AVFilterPad type.
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2008-02-16 00:11:25 +02:00
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*/
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2010-03-31 02:30:55 +03:00
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enum AVMediaType type;
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2008-02-16 00:11:25 +02:00
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2008-02-16 00:13:52 +02:00
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/**
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2012-08-12 11:59:37 +03:00
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* Input pads:
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2009-05-14 21:19:42 +03:00
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* Minimum required permissions on incoming buffers. Any buffer with
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2008-02-16 00:13:52 +02:00
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* insufficient permissions will be automatically copied by the filter
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* system to a new buffer which provides the needed access permissions.
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*
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2012-08-12 11:59:37 +03:00
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* Output pads:
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* Guaranteed permissions on outgoing buffers. Any buffer pushed on the
|
|
|
|
* link must have at least these permissions; this fact is checked by
|
|
|
|
* asserts. It can be used to optimize buffer allocation.
|
2008-02-16 00:13:52 +02:00
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
attribute_deprecated int min_perms;
|
2008-02-16 00:13:52 +02:00
|
|
|
|
|
|
|
/**
|
2012-08-12 11:59:37 +03:00
|
|
|
* Input pads:
|
2009-05-14 21:19:42 +03:00
|
|
|
* Permissions which are not accepted on incoming buffers. Any buffer
|
2009-01-02 12:07:26 +02:00
|
|
|
* which has any of these permissions set will be automatically copied
|
|
|
|
* by the filter system to a new buffer which does not have those
|
2009-05-14 21:19:42 +03:00
|
|
|
* permissions. This can be used to easily disallow buffers with
|
2009-01-02 12:07:26 +02:00
|
|
|
* AV_PERM_REUSE.
|
2008-02-16 00:13:52 +02:00
|
|
|
*
|
2012-08-12 11:59:37 +03:00
|
|
|
* Output pads:
|
|
|
|
* Permissions which are automatically removed on outgoing buffers. It
|
|
|
|
* can be used to optimize buffer allocation.
|
2008-02-16 00:13:52 +02:00
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
attribute_deprecated int rej_perms;
|
2008-02-16 00:13:52 +02:00
|
|
|
|
2008-02-16 00:11:25 +02:00
|
|
|
/**
|
2012-11-29 04:30:11 +03:00
|
|
|
* @deprecated unused
|
2008-02-16 00:11:25 +02:00
|
|
|
*/
|
2012-07-08 18:29:42 +03:00
|
|
|
int (*start_frame)(AVFilterLink *link, AVFilterBufferRef *picref);
|
2008-02-16 00:11:25 +02:00
|
|
|
|
|
|
|
/**
|
2010-08-17 21:08:03 +03:00
|
|
|
* Callback function to get a video buffer. If NULL, the filter system will
|
2012-10-31 22:54:53 +03:00
|
|
|
* use ff_default_get_video_buffer().
|
2008-02-16 00:13:40 +02:00
|
|
|
*
|
|
|
|
* Input video pads only.
|
2008-02-16 00:11:25 +02:00
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
AVFrame *(*get_video_buffer)(AVFilterLink *link, int w, int h);
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2010-08-17 21:08:03 +03:00
|
|
|
/**
|
|
|
|
* Callback function to get an audio buffer. If NULL, the filter system will
|
2012-10-31 22:54:53 +03:00
|
|
|
* use ff_default_get_audio_buffer().
|
2010-08-17 21:08:03 +03:00
|
|
|
*
|
|
|
|
* Input audio pads only.
|
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
AVFrame *(*get_audio_buffer)(AVFilterLink *link, int nb_samples);
|
2010-08-17 21:08:03 +03:00
|
|
|
|
2008-02-16 00:11:25 +02:00
|
|
|
/**
|
2012-11-29 04:30:11 +03:00
|
|
|
* @deprecated unused
|
2008-02-16 00:11:25 +02:00
|
|
|
*/
|
2012-07-14 10:25:33 +03:00
|
|
|
int (*end_frame)(AVFilterLink *link);
|
2008-02-16 00:11:25 +02:00
|
|
|
|
|
|
|
/**
|
2012-11-29 04:30:11 +03:00
|
|
|
* @deprecated unused
|
2008-02-16 00:11:25 +02:00
|
|
|
*/
|
2012-07-14 10:25:33 +03:00
|
|
|
int (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir);
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2010-08-17 21:08:03 +03:00
|
|
|
/**
|
2012-11-28 18:40:15 +03:00
|
|
|
* Filtering callback. This is where a filter receives a frame with
|
|
|
|
* audio/video data and should do its processing.
|
2010-08-17 21:08:03 +03:00
|
|
|
*
|
2012-11-28 18:40:15 +03:00
|
|
|
* Input pads only.
|
2012-07-02 21:13:40 +03:00
|
|
|
*
|
|
|
|
* @return >= 0 on success, a negative AVERROR on error. This function
|
2012-11-28 18:40:15 +03:00
|
|
|
* must ensure that frame is properly unreferenced on error if it
|
2012-07-02 21:13:40 +03:00
|
|
|
* hasn't been passed on to another filter.
|
2010-08-17 21:08:03 +03:00
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
int (*filter_frame)(AVFilterLink *link, AVFrame *frame);
|
2010-08-17 21:08:03 +03:00
|
|
|
|
2008-02-16 00:14:37 +02:00
|
|
|
/**
|
2009-05-14 21:19:42 +03:00
|
|
|
* Frame poll callback. This returns the number of immediately available
|
2010-09-23 14:12:03 +03:00
|
|
|
* samples. It should return a positive value if the next request_frame()
|
2008-02-16 00:14:37 +02:00
|
|
|
* is guaranteed to return one frame (with no delay).
|
|
|
|
*
|
|
|
|
* Defaults to just calling the source poll_frame() method.
|
|
|
|
*
|
2012-05-21 20:30:07 +03:00
|
|
|
* Output pads only.
|
2008-02-16 00:14:37 +02:00
|
|
|
*/
|
|
|
|
int (*poll_frame)(AVFilterLink *link);
|
|
|
|
|
2008-02-16 00:11:25 +02:00
|
|
|
/**
|
2009-05-14 21:19:42 +03:00
|
|
|
* Frame request callback. A call to this should result in at least one
|
|
|
|
* frame being output over the given link. This should return zero on
|
2008-02-16 00:13:40 +02:00
|
|
|
* success, and another value on error.
|
2012-06-24 03:09:53 +03:00
|
|
|
* See ff_request_frame() for the error codes with a specific
|
2012-04-17 19:26:44 +03:00
|
|
|
* meaning.
|
2008-02-16 00:13:40 +02:00
|
|
|
*
|
2012-05-21 20:30:07 +03:00
|
|
|
* Output pads only.
|
2008-02-16 00:11:25 +02:00
|
|
|
*/
|
2008-02-16 00:13:33 +02:00
|
|
|
int (*request_frame)(AVFilterLink *link);
|
2008-02-16 00:11:25 +02:00
|
|
|
|
|
|
|
/**
|
2008-02-16 00:13:40 +02:00
|
|
|
* Link configuration callback.
|
|
|
|
*
|
2011-08-04 15:47:01 +03:00
|
|
|
* For output pads, this should set the following link properties:
|
|
|
|
* video: width, height, sample_aspect_ratio, time_base
|
|
|
|
* audio: sample_rate.
|
|
|
|
*
|
|
|
|
* This should NOT set properties such as format, channel_layout, etc which
|
|
|
|
* are negotiated between filters by the filter system using the
|
2008-02-16 00:13:40 +02:00
|
|
|
* query_formats() callback before this function is called.
|
2008-02-16 00:12:41 +02:00
|
|
|
*
|
|
|
|
* For input pads, this should check the properties of the link, and update
|
|
|
|
* the filter's internal state as necessary.
|
2008-02-16 00:13:40 +02:00
|
|
|
*
|
2011-08-04 15:47:01 +03:00
|
|
|
* For both input and output pads, this should return zero on success,
|
2008-02-16 00:13:40 +02:00
|
|
|
* and another value on error.
|
2008-02-16 00:11:25 +02:00
|
|
|
*/
|
2008-02-16 00:12:41 +02:00
|
|
|
int (*config_props)(AVFilterLink *link);
|
2012-05-16 10:19:46 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* The filter expects a fifo to be inserted on its input link,
|
|
|
|
* typically because it has a delay.
|
|
|
|
*
|
|
|
|
* input pads only.
|
|
|
|
*/
|
|
|
|
int needs_fifo;
|
2012-11-28 10:41:07 +03:00
|
|
|
|
|
|
|
int needs_writable;
|
2008-02-16 00:11:25 +02:00
|
|
|
};
|
2012-06-12 21:12:42 +03:00
|
|
|
#endif
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2013-03-28 10:59:13 +03:00
|
|
|
/**
|
|
|
|
* Get the number of elements in a NULL-terminated array of AVFilterPads (e.g.
|
|
|
|
* AVFilter.inputs/outputs).
|
|
|
|
*/
|
|
|
|
int avfilter_pad_count(const AVFilterPad *pads);
|
|
|
|
|
2012-06-12 20:57:57 +03:00
|
|
|
/**
|
|
|
|
* Get the name of an AVFilterPad.
|
|
|
|
*
|
|
|
|
* @param pads an array of AVFilterPads
|
|
|
|
* @param pad_idx index of the pad in the array it; is the caller's
|
|
|
|
* responsibility to ensure the index is valid
|
|
|
|
*
|
|
|
|
* @return name of the pad_idx'th pad in pads
|
|
|
|
*/
|
2013-03-28 11:31:42 +03:00
|
|
|
const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx);
|
2012-06-12 20:57:57 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Get the type of an AVFilterPad.
|
|
|
|
*
|
|
|
|
* @param pads an array of AVFilterPads
|
|
|
|
* @param pad_idx index of the pad in the array; it is the caller's
|
|
|
|
* responsibility to ensure the index is valid
|
|
|
|
*
|
|
|
|
* @return type of the pad_idx'th pad in pads
|
|
|
|
*/
|
2013-03-28 11:31:42 +03:00
|
|
|
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx);
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2013-03-28 10:51:36 +03:00
|
|
|
/**
|
|
|
|
* The number of the filter inputs is not determined just by AVFilter.inputs.
|
|
|
|
* The filter might add additional inputs during initialization depending on the
|
|
|
|
* options supplied to it.
|
|
|
|
*/
|
|
|
|
#define AVFILTER_FLAG_DYNAMIC_INPUTS (1 << 0)
|
|
|
|
/**
|
|
|
|
* The number of the filter outputs is not determined just by AVFilter.outputs.
|
|
|
|
* The filter might add additional outputs during initialization depending on
|
|
|
|
* the options supplied to it.
|
|
|
|
*/
|
|
|
|
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS (1 << 1)
|
2013-04-08 21:35:02 +03:00
|
|
|
/**
|
|
|
|
* Some filters support a generic "enable" expression option that can be used
|
|
|
|
* to enable or disable a filter in the timeline. Filters supporting this
|
2013-05-09 02:04:41 +03:00
|
|
|
* option have this flag set. When the enable expression is false, the default
|
|
|
|
* no-op filter_frame() function is called in place of the filter_frame()
|
|
|
|
* callback defined on each input pad, thus the frame is passed unchanged to
|
|
|
|
* the next filters.
|
|
|
|
*/
|
|
|
|
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC (1 << 16)
|
|
|
|
/**
|
|
|
|
* Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will
|
|
|
|
* have its filter_frame() callback(s) called as usual even when the enable
|
|
|
|
* expression is false. The filter will disable filtering within the
|
|
|
|
* filter_frame() callback(s) itself, for example executing code depending on
|
|
|
|
* the AVFilterContext->is_disabled value.
|
|
|
|
*/
|
|
|
|
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL (1 << 17)
|
|
|
|
/**
|
|
|
|
* Handy mask to test whether the filter supports or no the timeline feature
|
|
|
|
* (internally or generically).
|
2013-04-08 21:35:02 +03:00
|
|
|
*/
|
2013-05-09 02:04:41 +03:00
|
|
|
#define AVFILTER_FLAG_SUPPORT_TIMELINE (AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL)
|
2013-03-28 10:51:36 +03:00
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2009-05-14 21:19:42 +03:00
|
|
|
* Filter definition. This defines the pads a filter contains, and all the
|
2008-02-16 00:13:40 +02:00
|
|
|
* callback functions used to interact with the filter.
|
|
|
|
*/
|
2010-08-12 21:20:58 +03:00
|
|
|
typedef struct AVFilter {
|
2008-02-16 00:14:41 +02:00
|
|
|
const char *name; ///< filter name
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2012-06-21 12:48:58 +03:00
|
|
|
/**
|
|
|
|
* A description for the filter. You should use the
|
|
|
|
* NULL_IF_CONFIG_SMALL() macro to define it.
|
|
|
|
*/
|
|
|
|
const char *description;
|
|
|
|
|
|
|
|
const AVFilterPad *inputs; ///< NULL terminated list of inputs. NULL if none
|
|
|
|
const AVFilterPad *outputs; ///< NULL terminated list of outputs. NULL if none
|
|
|
|
|
2013-02-25 23:21:29 +03:00
|
|
|
/**
|
|
|
|
* A class for the private data, used to access filter private
|
|
|
|
* AVOptions.
|
|
|
|
*/
|
|
|
|
const AVClass *priv_class;
|
|
|
|
|
2013-03-28 10:51:36 +03:00
|
|
|
/**
|
|
|
|
* A combination of AVFILTER_FLAG_*
|
|
|
|
*/
|
|
|
|
int flags;
|
|
|
|
|
2012-06-21 12:48:58 +03:00
|
|
|
/*****************************************************************
|
|
|
|
* All fields below this line are not part of the public API. They
|
|
|
|
* may not be used outside of libavfilter and can be changed and
|
|
|
|
* removed at will.
|
|
|
|
* New public fields should be added right above.
|
|
|
|
*****************************************************************
|
|
|
|
*/
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2008-02-16 00:12:37 +02:00
|
|
|
/**
|
2013-03-13 10:26:39 +03:00
|
|
|
* Filter initialization function. Called when all the options have been
|
|
|
|
* set.
|
2008-02-16 00:12:37 +02:00
|
|
|
*/
|
2013-03-13 10:26:39 +03:00
|
|
|
int (*init)(AVFilterContext *ctx);
|
2008-02-16 00:13:40 +02:00
|
|
|
|
2013-02-25 23:21:29 +03:00
|
|
|
/**
|
|
|
|
* Should be set instead of init by the filters that want to pass a
|
|
|
|
* dictionary of AVOptions to nested contexts that are allocated in
|
|
|
|
* init.
|
|
|
|
*/
|
|
|
|
int (*init_dict)(AVFilterContext *ctx, AVDictionary **options);
|
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2009-05-14 21:19:42 +03:00
|
|
|
* Filter uninitialization function. Should deallocate any memory held
|
2010-08-07 04:15:27 +03:00
|
|
|
* by the filter, release any buffer references, etc. This does not need
|
2008-02-16 00:13:40 +02:00
|
|
|
* to deallocate the AVFilterContext->priv memory itself.
|
|
|
|
*/
|
2008-02-16 00:11:25 +02:00
|
|
|
void (*uninit)(AVFilterContext *ctx);
|
|
|
|
|
2008-02-16 00:14:20 +02:00
|
|
|
/**
|
2011-06-19 21:31:24 +03:00
|
|
|
* Queries formats/layouts supported by the filter and its pads, and sets
|
|
|
|
* the in_formats/in_chlayouts for links connected to its output pads,
|
|
|
|
* and out_formats/out_chlayouts for links connected to its input pads.
|
2008-02-16 00:14:20 +02:00
|
|
|
*
|
2010-01-08 00:52:46 +02:00
|
|
|
* @return zero on success, a negative value corresponding to an
|
|
|
|
* AVERROR code otherwise
|
2008-02-16 00:14:20 +02:00
|
|
|
*/
|
|
|
|
int (*query_formats)(AVFilterContext *);
|
|
|
|
|
2012-06-21 12:48:58 +03:00
|
|
|
int priv_size; ///< size of private data to allocate for the filter
|
2011-08-28 21:46:31 +03:00
|
|
|
|
2013-04-03 10:20:36 +03:00
|
|
|
struct AVFilter *next;
|
2013-04-12 16:01:41 +03:00
|
|
|
|
2011-08-28 21:46:31 +03:00
|
|
|
/**
|
|
|
|
* Make the filter instance process a command.
|
|
|
|
*
|
|
|
|
* @param cmd the command to process, for handling simplicity all commands must be alphanumeric only
|
|
|
|
* @param arg the argument for the command
|
|
|
|
* @param res a buffer with size res_size where the filter(s) can return a response. This must not change when the command is not supported.
|
|
|
|
* @param flags if AVFILTER_CMD_FLAG_FAST is set and the command would be
|
2011-11-15 19:56:01 +03:00
|
|
|
* time consuming then a filter should treat it like an unsupported command
|
2011-08-28 21:46:31 +03:00
|
|
|
*
|
|
|
|
* @returns >=0 on success otherwise an error code.
|
|
|
|
* AVERROR(ENOSYS) on unsupported commands
|
|
|
|
*/
|
|
|
|
int (*process_command)(AVFilterContext *, const char *cmd, const char *arg, char *res, int res_len, int flags);
|
2012-07-06 01:41:27 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Filter initialization function, alternative to the init()
|
|
|
|
* callback. Args contains the user-supplied parameters, opaque is
|
|
|
|
* used for providing binary data.
|
|
|
|
*/
|
2013-04-12 12:13:33 +03:00
|
|
|
int (*init_opaque)(AVFilterContext *ctx, void *opaque);
|
2008-02-16 00:11:25 +02:00
|
|
|
} AVFilter;
|
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
/** An instance of a filter */
|
2010-08-12 21:20:58 +03:00
|
|
|
struct AVFilterContext {
|
2013-04-08 21:35:02 +03:00
|
|
|
const AVClass *av_class; ///< needed for av_log() and filters common options
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2013-03-31 09:20:06 +03:00
|
|
|
const AVFilter *filter; ///< the AVFilter of which this is an instance
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
char *name; ///< name of this filter instance
|
2008-02-16 00:12:54 +02:00
|
|
|
|
2012-06-21 12:48:58 +03:00
|
|
|
AVFilterPad *input_pads; ///< array of input pads
|
|
|
|
AVFilterLink **inputs; ///< array of pointers to input links
|
2012-06-12 22:25:10 +03:00
|
|
|
#if FF_API_FOO_COUNT
|
|
|
|
unsigned input_count; ///< @deprecated use nb_inputs
|
|
|
|
#endif
|
2012-06-21 12:48:58 +03:00
|
|
|
unsigned nb_inputs; ///< number of input pads
|
2008-02-16 00:13:10 +02:00
|
|
|
|
2012-06-21 12:48:58 +03:00
|
|
|
AVFilterPad *output_pads; ///< array of output pads
|
|
|
|
AVFilterLink **outputs; ///< array of pointers to output links
|
2012-06-12 22:25:10 +03:00
|
|
|
#if FF_API_FOO_COUNT
|
|
|
|
unsigned output_count; ///< @deprecated use nb_outputs
|
|
|
|
#endif
|
2012-06-21 12:48:58 +03:00
|
|
|
unsigned nb_outputs; ///< number of output pads
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
void *priv; ///< private data for use by the filter
|
2011-08-29 01:06:16 +03:00
|
|
|
|
2013-03-31 13:17:07 +03:00
|
|
|
struct AVFilterGraph *graph; ///< filtergraph this filter belongs to
|
2013-04-12 01:44:18 +03:00
|
|
|
|
2011-08-29 01:06:16 +03:00
|
|
|
struct AVFilterCommand *command_queue;
|
2013-04-08 21:35:02 +03:00
|
|
|
|
|
|
|
char *enable_str; ///< enable expression string
|
|
|
|
void *enable; ///< parsed expression (AVExpr*)
|
|
|
|
double *var_values; ///< variable values for the enable expression
|
2013-05-08 22:58:40 +03:00
|
|
|
int is_disabled; ///< the enabled state from the last expression evaluation
|
2008-02-16 00:11:25 +02:00
|
|
|
};
|
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2009-05-14 21:19:42 +03:00
|
|
|
* A link between two filters. This contains pointers to the source and
|
2008-05-27 02:14:25 +03:00
|
|
|
* destination filters between which this link exists, and the indexes of
|
2009-05-14 21:19:42 +03:00
|
|
|
* the pads involved. In addition, this link also contains the parameters
|
2008-02-16 00:13:40 +02:00
|
|
|
* which have been negotiated and agreed upon between the filter, such as
|
2009-01-10 12:26:05 +02:00
|
|
|
* image dimensions, format, etc.
|
2008-02-16 00:13:40 +02:00
|
|
|
*/
|
2010-08-12 21:20:58 +03:00
|
|
|
struct AVFilterLink {
|
2008-02-16 00:13:40 +02:00
|
|
|
AVFilterContext *src; ///< source filter
|
2010-09-27 19:58:48 +03:00
|
|
|
AVFilterPad *srcpad; ///< output pad on the source filter
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
AVFilterContext *dst; ///< dest filter
|
2010-09-27 19:58:48 +03:00
|
|
|
AVFilterPad *dstpad; ///< input pad on the dest filter
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2010-07-22 14:12:47 +03:00
|
|
|
enum AVMediaType type; ///< filter media type
|
|
|
|
|
2011-01-31 19:51:47 +02:00
|
|
|
/* These parameters apply only to video */
|
2008-02-16 00:13:40 +02:00
|
|
|
int w; ///< agreed upon image width
|
|
|
|
int h; ///< agreed upon image height
|
2011-01-31 19:51:47 +02:00
|
|
|
AVRational sample_aspect_ratio; ///< agreed upon sample aspect ratio
|
2011-06-28 08:56:19 +03:00
|
|
|
/* These parameters apply only to audio */
|
2012-11-10 18:00:00 +03:00
|
|
|
uint64_t channel_layout; ///< channel layout of current buffer (see libavutil/channel_layout.h)
|
2011-08-21 20:17:24 +03:00
|
|
|
int sample_rate; ///< samples per second
|
2010-08-17 21:08:03 +03:00
|
|
|
|
2010-07-22 14:12:47 +03:00
|
|
|
int format; ///< agreed upon media format
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2010-10-11 01:26:14 +03:00
|
|
|
/**
|
|
|
|
* Define the time base used by the PTS of the frames/samples
|
|
|
|
* which will pass through this link.
|
|
|
|
* During the configuration stage, each filter is supposed to
|
|
|
|
* change only the output timebase, while the timebase of the
|
|
|
|
* input link is assumed to be an unchangeable property.
|
|
|
|
*/
|
|
|
|
AVRational time_base;
|
2011-05-07 00:53:06 +03:00
|
|
|
|
2012-05-18 13:44:11 +03:00
|
|
|
/*****************************************************************
|
|
|
|
* All fields below this line are not part of the public API. They
|
|
|
|
* may not be used outside of libavfilter and can be changed and
|
|
|
|
* removed at will.
|
|
|
|
* New public fields should be added right above.
|
|
|
|
*****************************************************************
|
|
|
|
*/
|
2012-06-21 12:48:58 +03:00
|
|
|
/**
|
2012-06-27 02:58:09 +03:00
|
|
|
* Lists of formats and channel layouts supported by the input and output
|
|
|
|
* filters respectively. These lists are used for negotiating the format
|
|
|
|
* to actually be used, which will be loaded into the format and
|
|
|
|
* channel_layout members, above, when chosen.
|
|
|
|
*
|
2012-06-21 12:48:58 +03:00
|
|
|
*/
|
|
|
|
AVFilterFormats *in_formats;
|
|
|
|
AVFilterFormats *out_formats;
|
|
|
|
|
2012-05-18 13:44:11 +03:00
|
|
|
/**
|
|
|
|
* Lists of channel layouts and sample rates used for automatic
|
|
|
|
* negotiation.
|
|
|
|
*/
|
|
|
|
AVFilterFormats *in_samplerates;
|
|
|
|
AVFilterFormats *out_samplerates;
|
|
|
|
struct AVFilterChannelLayouts *in_channel_layouts;
|
|
|
|
struct AVFilterChannelLayouts *out_channel_layouts;
|
|
|
|
|
2012-05-27 15:18:49 +03:00
|
|
|
/**
|
|
|
|
* Audio only, the destination filter sets this to a non-zero value to
|
|
|
|
* request that buffers with the given number of samples should be sent to
|
|
|
|
* it. AVFilterPad.needs_fifo must also be set on the corresponding input
|
|
|
|
* pad.
|
|
|
|
* Last buffer before EOF will be padded with silence.
|
|
|
|
*/
|
|
|
|
int request_samples;
|
2012-06-24 03:09:53 +03:00
|
|
|
|
2012-06-21 12:48:58 +03:00
|
|
|
/** stage of the initialization of the link properties (dimensions, etc) */
|
|
|
|
enum {
|
|
|
|
AVLINK_UNINIT = 0, ///< not started
|
|
|
|
AVLINK_STARTINIT, ///< started, but incomplete
|
|
|
|
AVLINK_INIT ///< complete
|
|
|
|
} init_state;
|
|
|
|
|
2011-05-07 00:53:06 +03:00
|
|
|
struct AVFilterPool *pool;
|
2012-04-19 13:43:33 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Graph the filter belongs to.
|
|
|
|
*/
|
|
|
|
struct AVFilterGraph *graph;
|
|
|
|
|
2012-04-18 12:02:22 +03:00
|
|
|
/**
|
|
|
|
* Current timestamp of the link, as defined by the most recent
|
|
|
|
* frame(s), in AV_TIME_BASE units.
|
|
|
|
*/
|
|
|
|
int64_t current_pts;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Index in the age array.
|
|
|
|
*/
|
|
|
|
int age_index;
|
2012-05-16 03:27:31 +03:00
|
|
|
|
2012-06-05 13:32:57 +03:00
|
|
|
/**
|
|
|
|
* Frame rate of the stream on the link, or 1/0 if unknown;
|
|
|
|
* if left to 0/0, will be automatically be copied from the first input
|
|
|
|
* of the source filter if it exists.
|
|
|
|
*
|
|
|
|
* Sources should set it to the best estimation of the real frame rate.
|
|
|
|
* Filters should update it if necessary depending on their function.
|
|
|
|
* Sinks can use it to set a default output frame rate.
|
2012-07-30 06:01:45 +03:00
|
|
|
* It is similar to the r_frame_rate field in AVStream.
|
2012-06-05 13:32:57 +03:00
|
|
|
*/
|
|
|
|
AVRational frame_rate;
|
2012-06-30 11:11:22 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Buffer partially filled with samples to achieve a fixed/minimum size.
|
|
|
|
*/
|
2013-03-10 03:30:30 +03:00
|
|
|
AVFrame *partial_buf;
|
2012-06-30 11:11:22 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Size of the partial buffer to allocate.
|
|
|
|
* Must be between min_samples and max_samples.
|
|
|
|
*/
|
|
|
|
int partial_buf_size;
|
|
|
|
|
|
|
|
/**
|
2012-11-28 15:53:48 +03:00
|
|
|
* Minimum number of samples to filter at once. If filter_frame() is
|
2012-06-30 11:11:22 +03:00
|
|
|
* called with fewer samples, it will accumulate them in partial_buf.
|
|
|
|
* This field and the related ones must not be changed after filtering
|
|
|
|
* has started.
|
|
|
|
* If 0, all related fields are ignored.
|
|
|
|
*/
|
|
|
|
int min_samples;
|
|
|
|
|
|
|
|
/**
|
2012-11-28 15:53:48 +03:00
|
|
|
* Maximum number of samples to filter at once. If filter_frame() is
|
2012-06-30 11:11:22 +03:00
|
|
|
* called with more samples, it will split them.
|
|
|
|
*/
|
|
|
|
int max_samples;
|
2012-07-29 19:43:45 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* The buffer reference currently being received across the link by the
|
|
|
|
* destination filter. This is used internally by the filter system to
|
|
|
|
* allow automatic copying of buffers which do not have sufficient
|
|
|
|
* permissions for the destination. This should not be accessed directly
|
|
|
|
* by the filters.
|
|
|
|
*/
|
|
|
|
AVFilterBufferRef *cur_buf_copy;
|
2012-08-19 20:26:58 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* True if the link is closed.
|
2012-11-28 15:53:48 +03:00
|
|
|
* If set, all attemps of start_frame, filter_frame or request_frame
|
2012-08-19 20:26:58 +03:00
|
|
|
* will fail with AVERROR_EOF, and if necessary the reference will be
|
|
|
|
* destroyed.
|
|
|
|
* If request_frame returns AVERROR_EOF, this flag is set on the
|
|
|
|
* corresponding link.
|
|
|
|
* It can be set also be set by either the source or the destination
|
|
|
|
* filter.
|
|
|
|
*/
|
|
|
|
int closed;
|
2012-12-02 18:31:15 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Number of channels.
|
|
|
|
*/
|
|
|
|
int channels;
|
2013-03-31 20:17:57 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* True if a frame is being requested on the link.
|
|
|
|
* Used internally by the framework.
|
|
|
|
*/
|
|
|
|
unsigned frame_requested;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Link processing flags.
|
|
|
|
*/
|
|
|
|
unsigned flags;
|
2013-04-15 18:42:04 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Number of past frames sent through the link.
|
|
|
|
*/
|
|
|
|
int64_t frame_count;
|
2008-02-16 00:11:25 +02:00
|
|
|
};
|
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2010-06-30 18:38:06 +03:00
|
|
|
* Link two filters together.
|
2010-08-20 17:19:55 +03:00
|
|
|
*
|
2008-02-16 00:14:44 +02:00
|
|
|
* @param src the source filter
|
|
|
|
* @param srcpad index of the output pad on the source filter
|
|
|
|
* @param dst the destination filter
|
|
|
|
* @param dstpad index of the input pad on the destination filter
|
|
|
|
* @return zero on success
|
2008-02-16 00:13:40 +02:00
|
|
|
*/
|
2008-02-16 00:11:25 +02:00
|
|
|
int avfilter_link(AVFilterContext *src, unsigned srcpad,
|
|
|
|
AVFilterContext *dst, unsigned dstpad);
|
|
|
|
|
2011-06-02 18:45:33 +03:00
|
|
|
/**
|
|
|
|
* Free the link in *link, and set its pointer to NULL.
|
|
|
|
*/
|
|
|
|
void avfilter_link_free(AVFilterLink **link);
|
|
|
|
|
2012-12-02 18:31:15 +03:00
|
|
|
/**
|
|
|
|
* Get the number of channels of a link.
|
|
|
|
*/
|
|
|
|
int avfilter_link_get_channels(AVFilterLink *link);
|
|
|
|
|
2012-08-19 20:26:58 +03:00
|
|
|
/**
|
|
|
|
* Set the closed field of a link.
|
|
|
|
*/
|
|
|
|
void avfilter_link_set_closed(AVFilterLink *link, int closed);
|
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2010-07-22 14:12:47 +03:00
|
|
|
* Negotiate the media format, dimensions, etc of all inputs to a filter.
|
2010-08-20 17:19:55 +03:00
|
|
|
*
|
2008-02-16 00:14:44 +02:00
|
|
|
* @param filter the filter to negotiate the properties for its inputs
|
|
|
|
* @return zero on successful negotiation
|
2008-02-16 00:13:40 +02:00
|
|
|
*/
|
2008-02-16 00:14:25 +02:00
|
|
|
int avfilter_config_links(AVFilterContext *filter);
|
2008-02-16 00:13:28 +02:00
|
|
|
|
2012-11-28 10:41:07 +03:00
|
|
|
#if FF_API_AVFILTERBUFFER
|
2010-11-25 22:50:28 +02:00
|
|
|
/**
|
|
|
|
* Create a buffer reference wrapped around an already allocated image
|
|
|
|
* buffer.
|
|
|
|
*
|
|
|
|
* @param data pointers to the planes of the image to reference
|
|
|
|
* @param linesize linesizes for the planes of the image to reference
|
|
|
|
* @param perms the required access permissions
|
|
|
|
* @param w the width of the image specified by the data and linesize arrays
|
|
|
|
* @param h the height of the image specified by the data and linesize arrays
|
|
|
|
* @param format the pixel format of the image specified by the data and linesize arrays
|
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
attribute_deprecated
|
2010-11-25 22:50:28 +02:00
|
|
|
AVFilterBufferRef *
|
2011-06-01 21:44:08 +03:00
|
|
|
avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
|
2012-10-06 13:10:34 +03:00
|
|
|
int w, int h, enum AVPixelFormat format);
|
2010-11-25 22:50:28 +02:00
|
|
|
|
2011-01-31 01:07:41 +02:00
|
|
|
/**
|
|
|
|
* Create an audio buffer reference wrapped around an already
|
|
|
|
* allocated samples buffer.
|
|
|
|
*
|
2012-12-30 17:15:50 +03:00
|
|
|
* See avfilter_get_audio_buffer_ref_from_arrays_channels() for a version
|
|
|
|
* that can handle unknown channel layouts.
|
|
|
|
*
|
2011-01-31 01:07:41 +02:00
|
|
|
* @param data pointers to the samples plane buffers
|
|
|
|
* @param linesize linesize for the samples plane buffers
|
|
|
|
* @param perms the required access permissions
|
|
|
|
* @param nb_samples number of samples per channel
|
|
|
|
* @param sample_fmt the format of each sample in the buffer to allocate
|
|
|
|
* @param channel_layout the channel layout of the buffer
|
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
attribute_deprecated
|
2012-05-15 19:55:17 +03:00
|
|
|
AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data,
|
2011-01-31 01:07:41 +02:00
|
|
|
int linesize,
|
|
|
|
int perms,
|
|
|
|
int nb_samples,
|
|
|
|
enum AVSampleFormat sample_fmt,
|
|
|
|
uint64_t channel_layout);
|
2012-12-30 17:15:50 +03:00
|
|
|
/**
|
|
|
|
* Create an audio buffer reference wrapped around an already
|
|
|
|
* allocated samples buffer.
|
|
|
|
*
|
|
|
|
* @param data pointers to the samples plane buffers
|
|
|
|
* @param linesize linesize for the samples plane buffers
|
|
|
|
* @param perms the required access permissions
|
|
|
|
* @param nb_samples number of samples per channel
|
|
|
|
* @param sample_fmt the format of each sample in the buffer to allocate
|
|
|
|
* @param channels the number of channels of the buffer
|
|
|
|
* @param channel_layout the channel layout of the buffer,
|
|
|
|
* must be either 0 or consistent with channels
|
|
|
|
*/
|
2013-03-10 03:30:30 +03:00
|
|
|
attribute_deprecated
|
2012-12-30 17:15:50 +03:00
|
|
|
AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_arrays_channels(uint8_t **data,
|
|
|
|
int linesize,
|
|
|
|
int perms,
|
|
|
|
int nb_samples,
|
|
|
|
enum AVSampleFormat sample_fmt,
|
|
|
|
int channels,
|
|
|
|
uint64_t channel_layout);
|
|
|
|
|
2012-11-28 10:41:07 +03:00
|
|
|
#endif
|
2011-01-31 01:07:41 +02:00
|
|
|
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2011-08-28 21:46:31 +03:00
|
|
|
#define AVFILTER_CMD_FLAG_ONE 1 ///< Stop once a filter understood the command (for target=all for example), fast filters are favored automatically
|
|
|
|
#define AVFILTER_CMD_FLAG_FAST 2 ///< Only execute command when its fast (like a video out that supports contrast adjustment in hw)
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Make the filter instance process a command.
|
2011-11-15 19:56:01 +03:00
|
|
|
* It is recommended to use avfilter_graph_send_command().
|
2011-08-28 21:46:31 +03:00
|
|
|
*/
|
|
|
|
int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags);
|
|
|
|
|
2010-06-30 18:38:06 +03:00
|
|
|
/** Initialize the filter system. Register all builtin filters. */
|
2008-02-16 00:15:09 +02:00
|
|
|
void avfilter_register_all(void);
|
2008-02-16 00:15:06 +02:00
|
|
|
|
2013-04-03 10:20:36 +03:00
|
|
|
#if FF_API_OLD_FILTER_REGISTER
|
2010-06-30 18:38:06 +03:00
|
|
|
/** Uninitialize the filter system. Unregister all filters. */
|
2013-04-03 10:20:36 +03:00
|
|
|
attribute_deprecated
|
2008-02-16 00:11:25 +02:00
|
|
|
void avfilter_uninit(void);
|
2013-04-03 10:20:36 +03:00
|
|
|
#endif
|
2008-02-16 00:13:40 +02:00
|
|
|
|
|
|
|
/**
|
2010-06-30 18:38:06 +03:00
|
|
|
* Register a filter. This is only needed if you plan to use
|
2008-02-16 00:14:02 +02:00
|
|
|
* avfilter_get_by_name later to lookup the AVFilter structure by name. A
|
2013-03-31 09:28:11 +03:00
|
|
|
* filter can still by instantiated with avfilter_graph_alloc_filter even if it
|
|
|
|
* is not registered.
|
2010-08-20 17:19:55 +03:00
|
|
|
*
|
2008-02-16 00:14:44 +02:00
|
|
|
* @param filter the filter to register
|
2011-11-15 19:56:01 +03:00
|
|
|
* @return 0 if the registration was successful, a negative value
|
2009-11-25 01:47:33 +02:00
|
|
|
* otherwise
|
2008-02-16 00:13:40 +02:00
|
|
|
*/
|
2009-11-25 01:47:33 +02:00
|
|
|
int avfilter_register(AVFilter *filter);
|
2008-02-16 00:13:40 +02:00
|
|
|
|
|
|
|
/**
|
2010-06-30 18:38:06 +03:00
|
|
|
* Get a filter definition matching the given name.
|
2010-08-20 17:19:55 +03:00
|
|
|
*
|
2008-02-16 00:14:44 +02:00
|
|
|
* @param name the filter name to find
|
|
|
|
* @return the filter definition, if any matching one is registered.
|
2008-02-16 00:13:40 +02:00
|
|
|
* NULL if none found.
|
|
|
|
*/
|
2008-02-16 00:14:41 +02:00
|
|
|
AVFilter *avfilter_get_by_name(const char *name);
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2013-04-03 10:20:36 +03:00
|
|
|
/**
|
|
|
|
* Iterate over all registered filters.
|
|
|
|
* @return If prev is non-NULL, next registered filter after prev or NULL if
|
|
|
|
* prev is the last filter. If prev is NULL, return the first registered filter.
|
|
|
|
*/
|
|
|
|
const AVFilter *avfilter_next(const AVFilter *prev);
|
|
|
|
|
|
|
|
#if FF_API_OLD_FILTER_REGISTER
|
2009-11-25 01:58:48 +02:00
|
|
|
/**
|
|
|
|
* If filter is NULL, returns a pointer to the first registered filter pointer,
|
|
|
|
* if filter is non-NULL, returns the next pointer after filter.
|
|
|
|
* If the returned pointer points to NULL, the last registered filter
|
|
|
|
* was already reached.
|
2013-04-03 10:20:36 +03:00
|
|
|
* @deprecated use avfilter_next()
|
2009-11-25 01:58:48 +02:00
|
|
|
*/
|
2013-04-03 10:20:36 +03:00
|
|
|
attribute_deprecated
|
2009-11-25 01:58:48 +02:00
|
|
|
AVFilter **av_filter_next(AVFilter **filter);
|
2013-04-03 10:20:36 +03:00
|
|
|
#endif
|
2009-11-25 01:58:48 +02:00
|
|
|
|
2013-03-31 09:28:11 +03:00
|
|
|
#if FF_API_AVFILTER_OPEN
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2010-06-30 18:38:06 +03:00
|
|
|
* Create a filter instance.
|
2010-08-11 14:44:51 +03:00
|
|
|
*
|
|
|
|
* @param filter_ctx put here a pointer to the created filter context
|
|
|
|
* on success, NULL on failure
|
2008-02-16 00:14:44 +02:00
|
|
|
* @param filter the filter to create an instance of
|
2009-05-14 21:19:42 +03:00
|
|
|
* @param inst_name Name to give to the new instance. Can be NULL for none.
|
2010-08-11 14:44:51 +03:00
|
|
|
* @return >= 0 in case of success, a negative error code otherwise
|
2013-03-31 09:28:11 +03:00
|
|
|
* @deprecated use avfilter_graph_alloc_filter() instead
|
2008-02-16 00:13:40 +02:00
|
|
|
*/
|
2013-03-31 09:28:11 +03:00
|
|
|
attribute_deprecated
|
2010-08-11 14:44:51 +03:00
|
|
|
int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name);
|
2013-03-31 09:28:11 +03:00
|
|
|
#endif
|
2008-02-16 00:13:40 +02:00
|
|
|
|
2013-03-17 21:44:24 +03:00
|
|
|
|
|
|
|
#if FF_API_AVFILTER_INIT_FILTER
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2010-06-30 18:38:06 +03:00
|
|
|
* Initialize a filter.
|
2010-08-20 17:19:55 +03:00
|
|
|
*
|
2008-02-16 00:14:44 +02:00
|
|
|
* @param filter the filter to initialize
|
2008-02-16 00:13:40 +02:00
|
|
|
* @param args A string of parameters to use when initializing the filter.
|
|
|
|
* The format and meaning of this string varies by filter.
|
2009-05-14 21:19:42 +03:00
|
|
|
* @param opaque Any extra non-string data needed by the filter. The meaning
|
2008-02-16 00:13:40 +02:00
|
|
|
* of this parameter varies by filter.
|
2008-02-16 00:14:44 +02:00
|
|
|
* @return zero on success
|
2008-02-16 00:13:40 +02:00
|
|
|
*/
|
2013-03-17 21:44:24 +03:00
|
|
|
attribute_deprecated
|
2008-02-16 00:13:05 +02:00
|
|
|
int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque);
|
2013-03-17 21:44:24 +03:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Initialize a filter with the supplied parameters.
|
|
|
|
*
|
|
|
|
* @param ctx uninitialized filter context to initialize
|
|
|
|
* @param args Options to initialize the filter with. This must be a
|
|
|
|
* ':'-separated list of options in the 'key=value' form.
|
|
|
|
* May be NULL if the options have been set directly using the
|
|
|
|
* AVOptions API or there are no options that need to be set.
|
|
|
|
* @return 0 on success, a negative AVERROR on failure
|
|
|
|
*/
|
|
|
|
int avfilter_init_str(AVFilterContext *ctx, const char *args);
|
2008-02-16 00:13:40 +02:00
|
|
|
|
2013-03-17 22:16:12 +03:00
|
|
|
/**
|
|
|
|
* Initialize a filter with the supplied dictionary of options.
|
|
|
|
*
|
|
|
|
* @param ctx uninitialized filter context to initialize
|
|
|
|
* @param options An AVDictionary filled with options for this filter. On
|
|
|
|
* return this parameter will be destroyed and replaced with
|
|
|
|
* a dict containing options that were not found. This dictionary
|
|
|
|
* must be freed by the caller.
|
|
|
|
* May be NULL, then this function is equivalent to
|
|
|
|
* avfilter_init_str() with the second parameter set to NULL.
|
|
|
|
* @return 0 on success, a negative AVERROR on failure
|
|
|
|
*
|
|
|
|
* @note This function and avfilter_init_str() do essentially the same thing,
|
|
|
|
* the difference is in manner in which the options are passed. It is up to the
|
|
|
|
* calling code to choose whichever is more preferable. The two functions also
|
|
|
|
* behave differently when some of the provided options are not declared as
|
|
|
|
* supported by the filter. In such a case, avfilter_init_str() will fail, but
|
|
|
|
* this function will leave those extra options in the options AVDictionary and
|
|
|
|
* continue as usual.
|
|
|
|
*/
|
|
|
|
int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options);
|
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2013-03-31 14:02:55 +03:00
|
|
|
* Free a filter context. This will also remove the filter from its
|
|
|
|
* filtergraph's list of filters.
|
2010-08-20 17:19:55 +03:00
|
|
|
*
|
2010-11-08 14:32:39 +02:00
|
|
|
* @param filter the filter to free
|
2008-02-16 00:13:40 +02:00
|
|
|
*/
|
2010-11-08 14:32:39 +02:00
|
|
|
void avfilter_free(AVFilterContext *filter);
|
2008-02-16 00:11:25 +02:00
|
|
|
|
2008-02-16 00:13:40 +02:00
|
|
|
/**
|
2010-06-30 18:38:06 +03:00
|
|
|
* Insert a filter in the middle of an existing link.
|
2010-08-20 17:19:55 +03:00
|
|
|
*
|
2008-02-16 00:14:44 +02:00
|
|
|
* @param link the link into which the filter should be inserted
|
|
|
|
* @param filt the filter to be inserted
|
2010-09-28 00:57:16 +03:00
|
|
|
* @param filt_srcpad_idx the input pad on the filter to connect
|
|
|
|
* @param filt_dstpad_idx the output pad on the filter to connect
|
2008-02-16 00:14:44 +02:00
|
|
|
* @return zero on success
|
2008-02-16 00:13:40 +02:00
|
|
|
*/
|
2008-02-16 00:14:20 +02:00
|
|
|
int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
|
2010-09-28 00:57:16 +03:00
|
|
|
unsigned filt_srcpad_idx, unsigned filt_dstpad_idx);
|
2008-02-16 00:12:41 +02:00
|
|
|
|
2012-11-28 10:41:07 +03:00
|
|
|
#if FF_API_AVFILTERBUFFER
|
2011-05-01 15:47:05 +03:00
|
|
|
/**
|
|
|
|
* Copy the frame properties of src to dst, without copying the actual
|
|
|
|
* image data.
|
|
|
|
*
|
|
|
|
* @return 0 on success, a negative number on error.
|
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
attribute_deprecated
|
2011-05-01 15:47:05 +03:00
|
|
|
int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src);
|
|
|
|
|
2012-04-27 18:27:40 +03:00
|
|
|
/**
|
|
|
|
* Copy the frame properties and data pointers of src to dst, without copying
|
|
|
|
* the actual data.
|
|
|
|
*
|
|
|
|
* @return 0 on success, a negative number on error.
|
|
|
|
*/
|
2012-11-28 10:41:07 +03:00
|
|
|
attribute_deprecated
|
2012-04-27 18:27:40 +03:00
|
|
|
int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src);
|
2012-11-28 10:41:07 +03:00
|
|
|
#endif
|
2012-04-27 18:27:40 +03:00
|
|
|
|
2012-12-11 04:13:43 +03:00
|
|
|
/**
|
2013-03-13 11:09:36 +03:00
|
|
|
* @return AVClass for AVFilterContext.
|
|
|
|
*
|
|
|
|
* @see av_opt_find().
|
2012-12-11 04:13:43 +03:00
|
|
|
*/
|
2013-03-13 11:09:36 +03:00
|
|
|
const AVClass *avfilter_get_class(void);
|
2012-12-11 04:13:43 +03:00
|
|
|
|
2013-03-31 00:31:18 +03:00
|
|
|
typedef struct AVFilterGraph {
|
|
|
|
const AVClass *av_class;
|
|
|
|
#if FF_API_FOO_COUNT
|
|
|
|
attribute_deprecated
|
2013-04-12 00:40:41 +03:00
|
|
|
unsigned filter_count_unused;
|
2013-03-31 00:31:18 +03:00
|
|
|
#endif
|
|
|
|
AVFilterContext **filters;
|
|
|
|
#if !FF_API_FOO_COUNT
|
|
|
|
unsigned nb_filters;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
char *scale_sws_opts; ///< sws options to use for the auto-inserted scale filters
|
|
|
|
char *resample_lavr_opts; ///< libavresample options to use for the auto-inserted resample filters
|
|
|
|
#if FF_API_FOO_COUNT
|
|
|
|
unsigned nb_filters;
|
|
|
|
#endif
|
2013-04-12 00:40:41 +03:00
|
|
|
char *aresample_swr_opts; ///< swr options to use for the auto-inserted aresample filters, Access ONLY through AVOptions
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Private fields
|
|
|
|
*
|
|
|
|
* The following fields are for internal use only.
|
|
|
|
* Their type, offset, number and semantic can change without notice.
|
|
|
|
*/
|
|
|
|
|
|
|
|
AVFilterLink **sink_links;
|
|
|
|
int sink_links_count;
|
|
|
|
|
|
|
|
unsigned disable_auto_convert;
|
2013-03-31 00:31:18 +03:00
|
|
|
} AVFilterGraph;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Allocate a filter graph.
|
|
|
|
*/
|
|
|
|
AVFilterGraph *avfilter_graph_alloc(void);
|
|
|
|
|
2013-03-31 09:28:11 +03:00
|
|
|
/**
|
|
|
|
* Create a new filter instance in a filter graph.
|
|
|
|
*
|
|
|
|
* @param graph graph in which the new filter will be used
|
|
|
|
* @param filter the filter to create an instance of
|
|
|
|
* @param name Name to give to the new instance (will be copied to
|
|
|
|
* AVFilterContext.name). This may be used by the caller to identify
|
|
|
|
* different filters, libavfilter itself assigns no semantics to
|
|
|
|
* this parameter. May be NULL.
|
|
|
|
*
|
|
|
|
* @return the context of the newly created filter instance (note that it is
|
|
|
|
* also retrievable directly through AVFilterGraph.filters or with
|
|
|
|
* avfilter_graph_get_filter()) on success or NULL or failure.
|
|
|
|
*/
|
|
|
|
AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
|
|
|
|
const AVFilter *filter,
|
|
|
|
const char *name);
|
|
|
|
|
2013-03-31 00:31:18 +03:00
|
|
|
/**
|
|
|
|
* Get a filter instance with name name from graph.
|
|
|
|
*
|
|
|
|
* @return the pointer to the found filter instance or NULL if it
|
|
|
|
* cannot be found.
|
|
|
|
*/
|
|
|
|
AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name);
|
|
|
|
|
2013-03-31 09:31:40 +03:00
|
|
|
#if FF_API_AVFILTER_OPEN
|
2013-03-31 00:31:18 +03:00
|
|
|
/**
|
|
|
|
* Add an existing filter instance to a filter graph.
|
|
|
|
*
|
|
|
|
* @param graphctx the filter graph
|
|
|
|
* @param filter the filter to be added
|
2013-03-31 09:31:40 +03:00
|
|
|
*
|
|
|
|
* @deprecated use avfilter_graph_alloc_filter() to allocate a filter in a
|
|
|
|
* filter graph
|
2013-03-31 00:31:18 +03:00
|
|
|
*/
|
2013-03-31 09:31:40 +03:00
|
|
|
attribute_deprecated
|
2013-03-31 00:31:18 +03:00
|
|
|
int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
|
2013-03-31 09:31:40 +03:00
|
|
|
#endif
|
2013-03-31 00:31:18 +03:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Create and add a filter instance into an existing graph.
|
|
|
|
* The filter instance is created from the filter filt and inited
|
|
|
|
* with the parameters args and opaque.
|
|
|
|
*
|
|
|
|
* In case of success put in *filt_ctx the pointer to the created
|
|
|
|
* filter instance, otherwise set *filt_ctx to NULL.
|
|
|
|
*
|
|
|
|
* @param name the instance name to give to the created filter instance
|
|
|
|
* @param graph_ctx the filter graph
|
|
|
|
* @return a negative AVERROR error code in case of failure, a non
|
|
|
|
* negative value otherwise
|
|
|
|
*/
|
|
|
|
int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt,
|
|
|
|
const char *name, const char *args, void *opaque,
|
|
|
|
AVFilterGraph *graph_ctx);
|
|
|
|
|
2013-04-12 00:40:41 +03:00
|
|
|
/**
|
|
|
|
* Enable or disable automatic format conversion inside the graph.
|
|
|
|
*
|
|
|
|
* Note that format conversion can still happen inside explicitly inserted
|
|
|
|
* scale and aresample filters.
|
|
|
|
*
|
|
|
|
* @param flags any of the AVFILTER_AUTO_CONVERT_* constants
|
|
|
|
*/
|
|
|
|
void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags);
|
|
|
|
|
|
|
|
enum {
|
|
|
|
AVFILTER_AUTO_CONVERT_ALL = 0, /**< all automatic conversions enabled */
|
|
|
|
AVFILTER_AUTO_CONVERT_NONE = -1, /**< all automatic conversions disabled */
|
|
|
|
};
|
|
|
|
|
2013-03-31 00:31:18 +03:00
|
|
|
/**
|
|
|
|
* Check validity and configure all the links and formats in the graph.
|
|
|
|
*
|
|
|
|
* @param graphctx the filter graph
|
|
|
|
* @param log_ctx context used for logging
|
|
|
|
* @return 0 in case of success, a negative AVERROR code otherwise
|
|
|
|
*/
|
|
|
|
int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Free a graph, destroy its links, and set *graph to NULL.
|
|
|
|
* If *graph is NULL, do nothing.
|
|
|
|
*/
|
|
|
|
void avfilter_graph_free(AVFilterGraph **graph);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* A linked-list of the inputs/outputs of the filter chain.
|
|
|
|
*
|
|
|
|
* This is mainly useful for avfilter_graph_parse() / avfilter_graph_parse2(),
|
|
|
|
* where it is used to communicate open (unlinked) inputs and outputs from and
|
|
|
|
* to the caller.
|
|
|
|
* This struct specifies, per each not connected pad contained in the graph, the
|
|
|
|
* filter context and the pad index required for establishing a link.
|
|
|
|
*/
|
|
|
|
typedef struct AVFilterInOut {
|
|
|
|
/** unique name for this input/output in the list */
|
|
|
|
char *name;
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/** filter context associated to this input/output */
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AVFilterContext *filter_ctx;
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/** index of the filt_ctx pad to use for linking */
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int pad_idx;
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/** next input/input in the list, NULL if this is the last */
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struct AVFilterInOut *next;
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} AVFilterInOut;
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/**
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* Allocate a single AVFilterInOut entry.
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* Must be freed with avfilter_inout_free().
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* @return allocated AVFilterInOut on success, NULL on failure.
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*/
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AVFilterInOut *avfilter_inout_alloc(void);
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/**
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* Free the supplied list of AVFilterInOut and set *inout to NULL.
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* If *inout is NULL, do nothing.
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*/
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void avfilter_inout_free(AVFilterInOut **inout);
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/**
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* Add a graph described by a string to a graph.
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*
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* @param graph the filter graph where to link the parsed graph context
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* @param filters string to be parsed
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2013-04-12 00:40:41 +03:00
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* @param inputs pointer to a linked list to the inputs of the graph, may be NULL.
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* If non-NULL, *inputs is updated to contain the list of open inputs
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* after the parsing, should be freed with avfilter_inout_free().
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* @param outputs pointer to a linked list to the outputs of the graph, may be NULL.
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* If non-NULL, *outputs is updated to contain the list of open outputs
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* after the parsing, should be freed with avfilter_inout_free().
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* @return non negative on success, a negative AVERROR code on error
|
2013-03-31 00:31:18 +03:00
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*/
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int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,
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2013-04-12 00:40:41 +03:00
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AVFilterInOut **inputs, AVFilterInOut **outputs,
|
2013-03-31 00:31:18 +03:00
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void *log_ctx);
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/**
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* Add a graph described by a string to a graph.
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*
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* @param[in] graph the filter graph where to link the parsed graph context
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* @param[in] filters string to be parsed
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* @param[out] inputs a linked list of all free (unlinked) inputs of the
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* parsed graph will be returned here. It is to be freed
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* by the caller using avfilter_inout_free().
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* @param[out] outputs a linked list of all free (unlinked) outputs of the
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* parsed graph will be returned here. It is to be freed by the
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* caller using avfilter_inout_free().
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* @return zero on success, a negative AVERROR code on error
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*
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* @note the difference between avfilter_graph_parse2() and
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* avfilter_graph_parse() is that in avfilter_graph_parse(), the caller provides
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* the lists of inputs and outputs, which therefore must be known before calling
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* the function. On the other hand, avfilter_graph_parse2() \em returns the
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* inputs and outputs that are left unlinked after parsing the graph and the
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* caller then deals with them. Another difference is that in
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* avfilter_graph_parse(), the inputs parameter describes inputs of the
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* <em>already existing</em> part of the graph; i.e. from the point of view of
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* the newly created part, they are outputs. Similarly the outputs parameter
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* describes outputs of the already existing filters, which are provided as
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* inputs to the parsed filters.
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* avfilter_graph_parse2() takes the opposite approach -- it makes no reference
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* whatsoever to already existing parts of the graph and the inputs parameter
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* will on return contain inputs of the newly parsed part of the graph.
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* Analogously the outputs parameter will contain outputs of the newly created
|
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* filters.
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*/
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int avfilter_graph_parse2(AVFilterGraph *graph, const char *filters,
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AVFilterInOut **inputs,
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|
|
AVFilterInOut **outputs);
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|
2013-04-12 00:40:41 +03:00
|
|
|
/**
|
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|
|
* Send a command to one or more filter instances.
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|
*
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* @param graph the filter graph
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* @param target the filter(s) to which the command should be sent
|
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|
|
* "all" sends to all filters
|
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|
* otherwise it can be a filter or filter instance name
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|
|
* which will send the command to all matching filters.
|
2013-05-10 11:16:09 +03:00
|
|
|
* @param cmd the command to send, for handling simplicity all commands must be alphanumeric only
|
2013-04-12 00:40:41 +03:00
|
|
|
* @param arg the argument for the command
|
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|
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* @param res a buffer with size res_size where the filter(s) can return a response.
|
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|
|
*
|
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|
|
* @returns >=0 on success otherwise an error code.
|
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|
|
* AVERROR(ENOSYS) on unsupported commands
|
|
|
|
*/
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|
int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags);
|
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|
|
/**
|
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|
|
* Queue a command for one or more filter instances.
|
|
|
|
*
|
|
|
|
* @param graph the filter graph
|
|
|
|
* @param target the filter(s) to which the command should be sent
|
|
|
|
* "all" sends to all filters
|
|
|
|
* otherwise it can be a filter or filter instance name
|
|
|
|
* which will send the command to all matching filters.
|
|
|
|
* @param cmd the command to sent, for handling simplicity all commands must be alphanummeric only
|
|
|
|
* @param arg the argument for the command
|
|
|
|
* @param ts time at which the command should be sent to the filter
|
|
|
|
*
|
|
|
|
* @note As this executes commands after this function returns, no return code
|
|
|
|
* from the filter is provided, also AVFILTER_CMD_FLAG_ONE is not supported.
|
|
|
|
*/
|
|
|
|
int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, int flags, double ts);
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Dump a graph into a human-readable string representation.
|
|
|
|
*
|
|
|
|
* @param graph the graph to dump
|
|
|
|
* @param options formatting options; currently ignored
|
|
|
|
* @return a string, or NULL in case of memory allocation failure;
|
|
|
|
* the string must be freed using av_free
|
|
|
|
*/
|
|
|
|
char *avfilter_graph_dump(AVFilterGraph *graph, const char *options);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Request a frame on the oldest sink link.
|
|
|
|
*
|
|
|
|
* If the request returns AVERROR_EOF, try the next.
|
|
|
|
*
|
|
|
|
* Note that this function is not meant to be the sole scheduling mechanism
|
|
|
|
* of a filtergraph, only a convenience function to help drain a filtergraph
|
|
|
|
* in a balanced way under normal circumstances.
|
|
|
|
*
|
|
|
|
* Also note that AVERROR_EOF does not mean that frames did not arrive on
|
|
|
|
* some of the sinks during the process.
|
|
|
|
* When there are multiple sink links, in case the requested link
|
|
|
|
* returns an EOF, this may cause a filter to flush pending frames
|
|
|
|
* which are sent to another sink link, although unrequested.
|
|
|
|
*
|
|
|
|
* @return the return value of ff_request_frame(),
|
|
|
|
* or AVERROR_EOF if all links returned AVERROR_EOF
|
|
|
|
*/
|
|
|
|
int avfilter_graph_request_oldest(AVFilterGraph *graph);
|
|
|
|
|
2013-04-11 11:59:06 +03:00
|
|
|
/**
|
|
|
|
* @}
|
|
|
|
*/
|
2011-05-17 17:58:04 +03:00
|
|
|
#endif /* AVFILTER_AVFILTER_H */
|