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https://git.ffmpeg.org/ffmpeg.git
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a47bd5d77e
* commit '52627248e49e58eb4b78e4fcda90a64f4c476ea3': frame: add a cropping rectangle to AVFrame Merged-by: James Almer <jamrial@gmail.com>
779 lines
24 KiB
C
779 lines
24 KiB
C
/*
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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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/**
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* @file
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* @ingroup lavu_frame
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* reference-counted frame API
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*/
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#ifndef AVUTIL_FRAME_H
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#define AVUTIL_FRAME_H
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#include <stddef.h>
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#include <stdint.h>
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#include "avutil.h"
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#include "buffer.h"
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#include "dict.h"
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#include "rational.h"
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#include "samplefmt.h"
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#include "pixfmt.h"
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#include "version.h"
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/**
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* @defgroup lavu_frame AVFrame
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* @ingroup lavu_data
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*
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* @{
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* AVFrame is an abstraction for reference-counted raw multimedia data.
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*/
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enum AVFrameSideDataType {
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/**
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* The data is the AVPanScan struct defined in libavcodec.
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*/
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AV_FRAME_DATA_PANSCAN,
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/**
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* ATSC A53 Part 4 Closed Captions.
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* A53 CC bitstream is stored as uint8_t in AVFrameSideData.data.
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* The number of bytes of CC data is AVFrameSideData.size.
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*/
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AV_FRAME_DATA_A53_CC,
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/**
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* Stereoscopic 3d metadata.
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* The data is the AVStereo3D struct defined in libavutil/stereo3d.h.
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*/
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AV_FRAME_DATA_STEREO3D,
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/**
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* The data is the AVMatrixEncoding enum defined in libavutil/channel_layout.h.
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*/
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AV_FRAME_DATA_MATRIXENCODING,
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/**
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* Metadata relevant to a downmix procedure.
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* The data is the AVDownmixInfo struct defined in libavutil/downmix_info.h.
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*/
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AV_FRAME_DATA_DOWNMIX_INFO,
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/**
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* ReplayGain information in the form of the AVReplayGain struct.
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*/
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AV_FRAME_DATA_REPLAYGAIN,
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/**
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* This side data contains a 3x3 transformation matrix describing an affine
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* transformation that needs to be applied to the frame for correct
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* presentation.
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*
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* See libavutil/display.h for a detailed description of the data.
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*/
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AV_FRAME_DATA_DISPLAYMATRIX,
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/**
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* Active Format Description data consisting of a single byte as specified
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* in ETSI TS 101 154 using AVActiveFormatDescription enum.
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*/
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AV_FRAME_DATA_AFD,
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/**
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* Motion vectors exported by some codecs (on demand through the export_mvs
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* flag set in the libavcodec AVCodecContext flags2 option).
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* The data is the AVMotionVector struct defined in
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* libavutil/motion_vector.h.
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*/
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AV_FRAME_DATA_MOTION_VECTORS,
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/**
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* Recommmends skipping the specified number of samples. This is exported
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* only if the "skip_manual" AVOption is set in libavcodec.
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* This has the same format as AV_PKT_DATA_SKIP_SAMPLES.
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* @code
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* u32le number of samples to skip from start of this packet
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* u32le number of samples to skip from end of this packet
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* u8 reason for start skip
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* u8 reason for end skip (0=padding silence, 1=convergence)
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* @endcode
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*/
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AV_FRAME_DATA_SKIP_SAMPLES,
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/**
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* This side data must be associated with an audio frame and corresponds to
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* enum AVAudioServiceType defined in avcodec.h.
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*/
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AV_FRAME_DATA_AUDIO_SERVICE_TYPE,
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/**
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* Mastering display metadata associated with a video frame. The payload is
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* an AVMasteringDisplayMetadata type and contains information about the
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* mastering display color volume.
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*/
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AV_FRAME_DATA_MASTERING_DISPLAY_METADATA,
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/**
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* The GOP timecode in 25 bit timecode format. Data format is 64-bit integer.
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* This is set on the first frame of a GOP that has a temporal reference of 0.
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*/
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AV_FRAME_DATA_GOP_TIMECODE,
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/**
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* The data represents the AVSphericalMapping structure defined in
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* libavutil/spherical.h.
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*/
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AV_FRAME_DATA_SPHERICAL,
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/**
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* Content light level (based on CTA-861.3). This payload contains data in
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* the form of the AVContentLightMetadata struct.
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*/
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AV_FRAME_DATA_CONTENT_LIGHT_LEVEL,
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};
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enum AVActiveFormatDescription {
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AV_AFD_SAME = 8,
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AV_AFD_4_3 = 9,
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AV_AFD_16_9 = 10,
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AV_AFD_14_9 = 11,
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AV_AFD_4_3_SP_14_9 = 13,
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AV_AFD_16_9_SP_14_9 = 14,
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AV_AFD_SP_4_3 = 15,
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};
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/**
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* Structure to hold side data for an AVFrame.
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*
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* sizeof(AVFrameSideData) is not a part of the public ABI, so new fields may be added
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* to the end with a minor bump.
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*/
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typedef struct AVFrameSideData {
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enum AVFrameSideDataType type;
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uint8_t *data;
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int size;
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AVDictionary *metadata;
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AVBufferRef *buf;
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} AVFrameSideData;
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/**
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* This structure describes decoded (raw) audio or video data.
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*
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* AVFrame must be allocated using av_frame_alloc(). Note that this only
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* allocates the AVFrame itself, the buffers for the data must be managed
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* through other means (see below).
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* AVFrame must be freed with av_frame_free().
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*
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* AVFrame is typically allocated once and then reused multiple times to hold
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* different data (e.g. a single AVFrame to hold frames received from a
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* decoder). In such a case, av_frame_unref() will free any references held by
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* the frame and reset it to its original clean state before it
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* is reused again.
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*
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* The data described by an AVFrame is usually reference counted through the
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* AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
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* AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
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* least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
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* every single data plane must be contained in one of the buffers in
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* AVFrame.buf or AVFrame.extended_buf.
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* There may be a single buffer for all the data, or one separate buffer for
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* each plane, or anything in between.
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*
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* sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
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* to the end with a minor bump.
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*
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* Fields can be accessed through AVOptions, the name string used, matches the
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* C structure field name for fields accessible through AVOptions. The AVClass
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* for AVFrame can be obtained from avcodec_get_frame_class()
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*/
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typedef struct AVFrame {
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#define AV_NUM_DATA_POINTERS 8
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/**
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* pointer to the picture/channel planes.
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* This might be different from the first allocated byte
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*
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* Some decoders access areas outside 0,0 - width,height, please
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* see avcodec_align_dimensions2(). Some filters and swscale can read
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* up to 16 bytes beyond the planes, if these filters are to be used,
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* then 16 extra bytes must be allocated.
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*
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* NOTE: Except for hwaccel formats, pointers not needed by the format
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* MUST be set to NULL.
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*/
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uint8_t *data[AV_NUM_DATA_POINTERS];
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/**
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* For video, size in bytes of each picture line.
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* For audio, size in bytes of each plane.
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*
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* For audio, only linesize[0] may be set. For planar audio, each channel
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* plane must be the same size.
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*
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* For video the linesizes should be multiples of the CPUs alignment
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* preference, this is 16 or 32 for modern desktop CPUs.
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* Some code requires such alignment other code can be slower without
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* correct alignment, for yet other it makes no difference.
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*
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* @note The linesize may be larger than the size of usable data -- there
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* may be extra padding present for performance reasons.
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*/
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int linesize[AV_NUM_DATA_POINTERS];
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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 should always be set in a valid frame,
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* but for planar audio with more channels that can fit in data,
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* extended_data must be used in order to access all channels.
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*/
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uint8_t **extended_data;
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/**
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* @name Video dimensions
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* Video frames only. The coded dimensions (in pixels) of the video frame,
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* i.e. the size of the rectangle that contains some well-defined values.
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*
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* @note The part of the frame intended for display/presentation is further
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* restricted by the @ref cropping "Cropping rectangle".
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* @{
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*/
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int width, height;
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/**
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* @}
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*/
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/**
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* number of audio samples (per channel) described by this frame
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*/
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int nb_samples;
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/**
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* format of the frame, -1 if unknown or unset
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* Values correspond to enum AVPixelFormat for video frames,
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* enum AVSampleFormat for audio)
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*/
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int format;
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/**
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* 1 -> keyframe, 0-> not
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*/
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int key_frame;
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/**
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* Picture type of the frame.
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*/
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enum AVPictureType pict_type;
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/**
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* Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
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*/
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AVRational sample_aspect_ratio;
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/**
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* Presentation timestamp in time_base units (time when frame should be shown to user).
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*/
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int64_t pts;
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#if FF_API_PKT_PTS
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/**
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* PTS copied from the AVPacket that was decoded to produce this frame.
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* @deprecated use the pts field instead
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*/
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attribute_deprecated
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int64_t pkt_pts;
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#endif
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/**
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* DTS copied from the AVPacket that triggered returning this frame. (if frame threading isn't used)
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* This is also the Presentation time of this AVFrame calculated from
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* only AVPacket.dts values without pts values.
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*/
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int64_t pkt_dts;
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/**
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* picture number in bitstream order
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*/
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int coded_picture_number;
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/**
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* picture number in display order
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*/
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int display_picture_number;
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/**
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* quality (between 1 (good) and FF_LAMBDA_MAX (bad))
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*/
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int quality;
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/**
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* for some private data of the user
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*/
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void *opaque;
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#if FF_API_ERROR_FRAME
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/**
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* @deprecated unused
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*/
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attribute_deprecated
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uint64_t error[AV_NUM_DATA_POINTERS];
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#endif
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/**
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* When decoding, this signals how much the picture must be delayed.
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* extra_delay = repeat_pict / (2*fps)
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*/
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int repeat_pict;
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/**
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* The content of the picture is interlaced.
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*/
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int interlaced_frame;
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/**
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* If the content is interlaced, is top field displayed first.
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*/
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int top_field_first;
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/**
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* Tell user application that palette has changed from previous frame.
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*/
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int palette_has_changed;
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/**
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* reordered opaque 64 bits (generally an integer or a double precision float
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* PTS but can be anything).
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* The user sets AVCodecContext.reordered_opaque to represent the input at
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* that time,
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* the decoder reorders values as needed and sets AVFrame.reordered_opaque
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* to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
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* @deprecated in favor of pkt_pts
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*/
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int64_t reordered_opaque;
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/**
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* Sample rate of the audio data.
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*/
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int sample_rate;
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/**
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* Channel layout of the audio data.
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*/
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uint64_t channel_layout;
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/**
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* AVBuffer references backing the data for this frame. If all elements of
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* this array are NULL, then this frame is not reference counted. This array
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* must be filled contiguously -- if buf[i] is non-NULL then buf[j] must
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* also be non-NULL for all j < i.
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*
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* There may be at most one AVBuffer per data plane, so for video this array
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* always contains all the references. For planar audio with more than
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* AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
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* this array. Then the extra AVBufferRef pointers are stored in the
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* extended_buf array.
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*/
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AVBufferRef *buf[AV_NUM_DATA_POINTERS];
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/**
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* For planar audio which requires more than AV_NUM_DATA_POINTERS
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* AVBufferRef pointers, this array will hold all the references which
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* cannot fit into AVFrame.buf.
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*
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* Note that this is different from AVFrame.extended_data, which always
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* contains all the pointers. This array only contains the extra pointers,
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* which cannot fit into AVFrame.buf.
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*
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* This array is always allocated using av_malloc() by whoever constructs
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* the frame. It is freed in av_frame_unref().
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*/
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AVBufferRef **extended_buf;
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/**
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* Number of elements in extended_buf.
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*/
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int nb_extended_buf;
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AVFrameSideData **side_data;
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int nb_side_data;
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/**
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* @defgroup lavu_frame_flags AV_FRAME_FLAGS
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* @ingroup lavu_frame
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* Flags describing additional frame properties.
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*
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* @{
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*/
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/**
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* The frame data may be corrupted, e.g. due to decoding errors.
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*/
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#define AV_FRAME_FLAG_CORRUPT (1 << 0)
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/**
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* A flag to mark the frames which need to be decoded, but shouldn't be output.
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*/
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#define AV_FRAME_FLAG_DISCARD (1 << 2)
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/**
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* @}
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*/
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/**
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* Frame flags, a combination of @ref lavu_frame_flags
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*/
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int flags;
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/**
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* MPEG vs JPEG YUV range.
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* - encoding: Set by user
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* - decoding: Set by libavcodec
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*/
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enum AVColorRange color_range;
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enum AVColorPrimaries color_primaries;
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enum AVColorTransferCharacteristic color_trc;
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/**
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* YUV colorspace type.
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* - encoding: Set by user
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* - decoding: Set by libavcodec
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*/
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enum AVColorSpace colorspace;
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enum AVChromaLocation chroma_location;
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/**
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* frame timestamp estimated using various heuristics, in stream time base
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* - encoding: unused
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* - decoding: set by libavcodec, read by user.
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*/
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int64_t best_effort_timestamp;
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/**
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* reordered pos from the last AVPacket that has been input into the decoder
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* - encoding: unused
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* - decoding: Read by user.
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*/
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int64_t pkt_pos;
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/**
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* duration of the corresponding packet, expressed in
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* AVStream->time_base units, 0 if unknown.
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* - encoding: unused
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* - decoding: Read by user.
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*/
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int64_t pkt_duration;
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/**
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* metadata.
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* - encoding: Set by user.
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* - decoding: Set by libavcodec.
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*/
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AVDictionary *metadata;
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/**
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* decode error flags of the frame, set to a combination of
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* FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
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* were errors during the decoding.
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* - encoding: unused
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* - decoding: set by libavcodec, read by user.
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*/
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int decode_error_flags;
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#define FF_DECODE_ERROR_INVALID_BITSTREAM 1
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#define FF_DECODE_ERROR_MISSING_REFERENCE 2
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/**
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* number of audio channels, only used for audio.
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* - encoding: unused
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* - decoding: Read by user.
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*/
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int channels;
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/**
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* size of the corresponding packet containing the compressed
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* frame.
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* It is set to a negative value if unknown.
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* - encoding: unused
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* - decoding: set by libavcodec, read by user.
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*/
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int pkt_size;
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#if FF_API_FRAME_QP
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/**
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* QP table
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*/
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attribute_deprecated
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int8_t *qscale_table;
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/**
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* QP store stride
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*/
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attribute_deprecated
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int qstride;
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attribute_deprecated
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int qscale_type;
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AVBufferRef *qp_table_buf;
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#endif
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/**
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* For hwaccel-format frames, this should be a reference to the
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* AVHWFramesContext describing the frame.
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*/
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AVBufferRef *hw_frames_ctx;
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/**
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* AVBufferRef for free use by the API user. FFmpeg will never check the
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* contents of the buffer ref. FFmpeg calls av_buffer_unref() on it when
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* the frame is unreferenced. av_frame_copy_props() calls create a new
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* reference with av_buffer_ref() for the target frame's opaque_ref field.
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*
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* This is unrelated to the opaque field, although it serves a similar
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* purpose.
|
|
*/
|
|
AVBufferRef *opaque_ref;
|
|
|
|
/**
|
|
* @anchor cropping
|
|
* @name Cropping
|
|
* Video frames only. The number of pixels to discard from the the
|
|
* top/bottom/left/right border of the frame to obtain the sub-rectangle of
|
|
* the frame intended for presentation.
|
|
* @{
|
|
*/
|
|
size_t crop_top;
|
|
size_t crop_bottom;
|
|
size_t crop_left;
|
|
size_t crop_right;
|
|
/**
|
|
* @}
|
|
*/
|
|
} AVFrame;
|
|
|
|
/**
|
|
* Accessors for some AVFrame fields. These used to be provided for ABI
|
|
* compatibility, and do not need to be used anymore.
|
|
*/
|
|
int64_t av_frame_get_best_effort_timestamp(const AVFrame *frame);
|
|
void av_frame_set_best_effort_timestamp(AVFrame *frame, int64_t val);
|
|
int64_t av_frame_get_pkt_duration (const AVFrame *frame);
|
|
void av_frame_set_pkt_duration (AVFrame *frame, int64_t val);
|
|
int64_t av_frame_get_pkt_pos (const AVFrame *frame);
|
|
void av_frame_set_pkt_pos (AVFrame *frame, int64_t val);
|
|
int64_t av_frame_get_channel_layout (const AVFrame *frame);
|
|
void av_frame_set_channel_layout (AVFrame *frame, int64_t val);
|
|
int av_frame_get_channels (const AVFrame *frame);
|
|
void av_frame_set_channels (AVFrame *frame, int val);
|
|
int av_frame_get_sample_rate (const AVFrame *frame);
|
|
void av_frame_set_sample_rate (AVFrame *frame, int val);
|
|
AVDictionary *av_frame_get_metadata (const AVFrame *frame);
|
|
void av_frame_set_metadata (AVFrame *frame, AVDictionary *val);
|
|
int av_frame_get_decode_error_flags (const AVFrame *frame);
|
|
void av_frame_set_decode_error_flags (AVFrame *frame, int val);
|
|
int av_frame_get_pkt_size(const AVFrame *frame);
|
|
void av_frame_set_pkt_size(AVFrame *frame, int val);
|
|
AVDictionary **avpriv_frame_get_metadatap(AVFrame *frame);
|
|
#if FF_API_FRAME_QP
|
|
int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type);
|
|
int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int type);
|
|
#endif
|
|
enum AVColorSpace av_frame_get_colorspace(const AVFrame *frame);
|
|
void av_frame_set_colorspace(AVFrame *frame, enum AVColorSpace val);
|
|
enum AVColorRange av_frame_get_color_range(const AVFrame *frame);
|
|
void av_frame_set_color_range(AVFrame *frame, enum AVColorRange val);
|
|
|
|
/**
|
|
* Get the name of a colorspace.
|
|
* @return a static string identifying the colorspace; can be NULL.
|
|
*/
|
|
const char *av_get_colorspace_name(enum AVColorSpace val);
|
|
|
|
/**
|
|
* Allocate an AVFrame and set its fields to default values. The resulting
|
|
* struct must be freed using av_frame_free().
|
|
*
|
|
* @return An AVFrame filled with default values or NULL on failure.
|
|
*
|
|
* @note this only allocates the AVFrame itself, not the data buffers. Those
|
|
* must be allocated through other means, e.g. with av_frame_get_buffer() or
|
|
* manually.
|
|
*/
|
|
AVFrame *av_frame_alloc(void);
|
|
|
|
/**
|
|
* Free the frame and any dynamically allocated objects in it,
|
|
* e.g. extended_data. If the frame is reference counted, it will be
|
|
* unreferenced first.
|
|
*
|
|
* @param frame frame to be freed. The pointer will be set to NULL.
|
|
*/
|
|
void av_frame_free(AVFrame **frame);
|
|
|
|
/**
|
|
* Set up a new reference to the data described by the source frame.
|
|
*
|
|
* Copy frame properties from src to dst and create a new reference for each
|
|
* AVBufferRef from src.
|
|
*
|
|
* If src is not reference counted, new buffers are allocated and the data is
|
|
* copied.
|
|
*
|
|
* @warning: dst MUST have been either unreferenced with av_frame_unref(dst),
|
|
* or newly allocated with av_frame_alloc() before calling this
|
|
* function, or undefined behavior will occur.
|
|
*
|
|
* @return 0 on success, a negative AVERROR on error
|
|
*/
|
|
int av_frame_ref(AVFrame *dst, const AVFrame *src);
|
|
|
|
/**
|
|
* Create a new frame that references the same data as src.
|
|
*
|
|
* This is a shortcut for av_frame_alloc()+av_frame_ref().
|
|
*
|
|
* @return newly created AVFrame on success, NULL on error.
|
|
*/
|
|
AVFrame *av_frame_clone(const AVFrame *src);
|
|
|
|
/**
|
|
* Unreference all the buffers referenced by frame and reset the frame fields.
|
|
*/
|
|
void av_frame_unref(AVFrame *frame);
|
|
|
|
/**
|
|
* Move everything contained in src to dst and reset src.
|
|
*
|
|
* @warning: dst is not unreferenced, but directly overwritten without reading
|
|
* or deallocating its contents. Call av_frame_unref(dst) manually
|
|
* before calling this function to ensure that no memory is leaked.
|
|
*/
|
|
void av_frame_move_ref(AVFrame *dst, AVFrame *src);
|
|
|
|
/**
|
|
* Allocate new buffer(s) for audio or video data.
|
|
*
|
|
* The following fields must be set on frame before calling this function:
|
|
* - format (pixel format for video, sample format for audio)
|
|
* - width and height for video
|
|
* - nb_samples and channel_layout for audio
|
|
*
|
|
* This function will fill AVFrame.data and AVFrame.buf arrays and, if
|
|
* necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf.
|
|
* For planar formats, one buffer will be allocated for each plane.
|
|
*
|
|
* @warning: if frame already has been allocated, calling this function will
|
|
* leak memory. In addition, undefined behavior can occur in certain
|
|
* cases.
|
|
*
|
|
* @param frame frame in which to store the new buffers.
|
|
* @param align required buffer size alignment
|
|
*
|
|
* @return 0 on success, a negative AVERROR on error.
|
|
*/
|
|
int av_frame_get_buffer(AVFrame *frame, int align);
|
|
|
|
/**
|
|
* Check if the frame data is writable.
|
|
*
|
|
* @return A positive value if the frame data is writable (which is true if and
|
|
* only if each of the underlying buffers has only one reference, namely the one
|
|
* stored in this frame). Return 0 otherwise.
|
|
*
|
|
* If 1 is returned the answer is valid until av_buffer_ref() is called on any
|
|
* of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
|
|
*
|
|
* @see av_frame_make_writable(), av_buffer_is_writable()
|
|
*/
|
|
int av_frame_is_writable(AVFrame *frame);
|
|
|
|
/**
|
|
* Ensure that the frame data is writable, avoiding data copy if possible.
|
|
*
|
|
* Do nothing if the frame is writable, allocate new buffers and copy the data
|
|
* if it is not.
|
|
*
|
|
* @return 0 on success, a negative AVERROR on error.
|
|
*
|
|
* @see av_frame_is_writable(), av_buffer_is_writable(),
|
|
* av_buffer_make_writable()
|
|
*/
|
|
int av_frame_make_writable(AVFrame *frame);
|
|
|
|
/**
|
|
* Copy the frame data from src to dst.
|
|
*
|
|
* This function does not allocate anything, dst must be already initialized and
|
|
* allocated with the same parameters as src.
|
|
*
|
|
* This function only copies the frame data (i.e. the contents of the data /
|
|
* extended data arrays), not any other properties.
|
|
*
|
|
* @return >= 0 on success, a negative AVERROR on error.
|
|
*/
|
|
int av_frame_copy(AVFrame *dst, const AVFrame *src);
|
|
|
|
/**
|
|
* Copy only "metadata" fields from src to dst.
|
|
*
|
|
* Metadata for the purpose of this function are those fields that do not affect
|
|
* the data layout in the buffers. E.g. pts, sample rate (for audio) or sample
|
|
* aspect ratio (for video), but not width/height or channel layout.
|
|
* Side data is also copied.
|
|
*/
|
|
int av_frame_copy_props(AVFrame *dst, const AVFrame *src);
|
|
|
|
/**
|
|
* Get the buffer reference a given data plane is stored in.
|
|
*
|
|
* @param plane index of the data plane of interest in frame->extended_data.
|
|
*
|
|
* @return the buffer reference that contains the plane or NULL if the input
|
|
* frame is not valid.
|
|
*/
|
|
AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane);
|
|
|
|
/**
|
|
* Add a new side data to a frame.
|
|
*
|
|
* @param frame a frame to which the side data should be added
|
|
* @param type type of the added side data
|
|
* @param size size of the side data
|
|
*
|
|
* @return newly added side data on success, NULL on error
|
|
*/
|
|
AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
|
|
enum AVFrameSideDataType type,
|
|
int size);
|
|
|
|
/**
|
|
* @return a pointer to the side data of a given type on success, NULL if there
|
|
* is no side data with such type in this frame.
|
|
*/
|
|
AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
|
|
enum AVFrameSideDataType type);
|
|
|
|
/**
|
|
* If side data of the supplied type exists in the frame, free it and remove it
|
|
* from the frame.
|
|
*/
|
|
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type);
|
|
|
|
/**
|
|
* @return a string identifying the side data type
|
|
*/
|
|
const char *av_frame_side_data_name(enum AVFrameSideDataType type);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* AVUTIL_FRAME_H */
|