From 4a6d9312cc1c9d62d66c4def71246d9faae29edb Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期三, 03 三月 2021 14:26:16 +0800
Subject: [PATCH] environment settings
---
module/VideoPlayer/lib/linux/ffmpeg/include/libavutil/frame.h | 901 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 901 insertions(+), 0 deletions(-)
diff --git a/module/VideoPlayer/lib/linux/ffmpeg/include/libavutil/frame.h b/module/VideoPlayer/lib/linux/ffmpeg/include/libavutil/frame.h
new file mode 100644
index 0000000..e2a2929
--- /dev/null
+++ b/module/VideoPlayer/lib/linux/ffmpeg/include/libavutil/frame.h
@@ -0,0 +1,901 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_frame
+ * reference-counted frame API
+ */
+
+#ifndef AVUTIL_FRAME_H
+#define AVUTIL_FRAME_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "avutil.h"
+#include "buffer.h"
+#include "dict.h"
+#include "rational.h"
+#include "samplefmt.h"
+#include "pixfmt.h"
+#include "version.h"
+
+
+/**
+ * @defgroup lavu_frame AVFrame
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVFrame is an abstraction for reference-counted raw multimedia data.
+ */
+
+enum AVFrameSideDataType {
+ /**
+ * The data is the AVPanScan struct defined in libavcodec.
+ */
+ AV_FRAME_DATA_PANSCAN,
+ /**
+ * ATSC A53 Part 4 Closed Captions.
+ * A53 CC bitstream is stored as uint8_t in AVFrameSideData.data.
+ * The number of bytes of CC data is AVFrameSideData.size.
+ */
+ AV_FRAME_DATA_A53_CC,
+ /**
+ * Stereoscopic 3d metadata.
+ * The data is the AVStereo3D struct defined in libavutil/stereo3d.h.
+ */
+ AV_FRAME_DATA_STEREO3D,
+ /**
+ * The data is the AVMatrixEncoding enum defined in libavutil/channel_layout.h.
+ */
+ AV_FRAME_DATA_MATRIXENCODING,
+ /**
+ * Metadata relevant to a downmix procedure.
+ * The data is the AVDownmixInfo struct defined in libavutil/downmix_info.h.
+ */
+ AV_FRAME_DATA_DOWNMIX_INFO,
+ /**
+ * ReplayGain information in the form of the AVReplayGain struct.
+ */
+ AV_FRAME_DATA_REPLAYGAIN,
+ /**
+ * This side data contains a 3x3 transformation matrix describing an affine
+ * transformation that needs to be applied to the frame for correct
+ * presentation.
+ *
+ * See libavutil/display.h for a detailed description of the data.
+ */
+ AV_FRAME_DATA_DISPLAYMATRIX,
+ /**
+ * Active Format Description data consisting of a single byte as specified
+ * in ETSI TS 101 154 using AVActiveFormatDescription enum.
+ */
+ AV_FRAME_DATA_AFD,
+ /**
+ * Motion vectors exported by some codecs (on demand through the export_mvs
+ * flag set in the libavcodec AVCodecContext flags2 option).
+ * The data is the AVMotionVector struct defined in
+ * libavutil/motion_vector.h.
+ */
+ AV_FRAME_DATA_MOTION_VECTORS,
+ /**
+ * Recommmends skipping the specified number of samples. This is exported
+ * only if the "skip_manual" AVOption is set in libavcodec.
+ * This has the same format as AV_PKT_DATA_SKIP_SAMPLES.
+ * @code
+ * u32le number of samples to skip from start of this packet
+ * u32le number of samples to skip from end of this packet
+ * u8 reason for start skip
+ * u8 reason for end skip (0=padding silence, 1=convergence)
+ * @endcode
+ */
+ AV_FRAME_DATA_SKIP_SAMPLES,
+ /**
+ * This side data must be associated with an audio frame and corresponds to
+ * enum AVAudioServiceType defined in avcodec.h.
+ */
+ AV_FRAME_DATA_AUDIO_SERVICE_TYPE,
+ /**
+ * Mastering display metadata associated with a video frame. The payload is
+ * an AVMasteringDisplayMetadata type and contains information about the
+ * mastering display color volume.
+ */
+ AV_FRAME_DATA_MASTERING_DISPLAY_METADATA,
+ /**
+ * The GOP timecode in 25 bit timecode format. Data format is 64-bit integer.
+ * This is set on the first frame of a GOP that has a temporal reference of 0.
+ */
+ AV_FRAME_DATA_GOP_TIMECODE,
+
+ /**
+ * The data represents the AVSphericalMapping structure defined in
+ * libavutil/spherical.h.
+ */
+ AV_FRAME_DATA_SPHERICAL,
+
+ /**
+ * Content light level (based on CTA-861.3). This payload contains data in
+ * the form of the AVContentLightMetadata struct.
+ */
+ AV_FRAME_DATA_CONTENT_LIGHT_LEVEL,
+
+ /**
+ * The data contains an ICC profile as an opaque octet buffer following the
+ * format described by ISO 15076-1 with an optional name defined in the
+ * metadata key entry "name".
+ */
+ AV_FRAME_DATA_ICC_PROFILE,
+
+#if FF_API_FRAME_QP
+ /**
+ * Implementation-specific description of the format of AV_FRAME_QP_TABLE_DATA.
+ * The contents of this side data are undocumented and internal; use
+ * av_frame_set_qp_table() and av_frame_get_qp_table() to access this in a
+ * meaningful way instead.
+ */
+ AV_FRAME_DATA_QP_TABLE_PROPERTIES,
+
+ /**
+ * Raw QP table data. Its format is described by
+ * AV_FRAME_DATA_QP_TABLE_PROPERTIES. Use av_frame_set_qp_table() and
+ * av_frame_get_qp_table() to access this instead.
+ */
+ AV_FRAME_DATA_QP_TABLE_DATA,
+#endif
+
+ /**
+ * Timecode which conforms to SMPTE ST 12-1. The data is an array of 4 uint32_t
+ * where the first uint32_t describes how many (1-3) of the other timecodes are used.
+ * The timecode format is described in the av_timecode_get_smpte_from_framenum()
+ * function in libavutil/timecode.c.
+ */
+ AV_FRAME_DATA_S12M_TIMECODE,
+};
+
+enum AVActiveFormatDescription {
+ AV_AFD_SAME = 8,
+ AV_AFD_4_3 = 9,
+ AV_AFD_16_9 = 10,
+ AV_AFD_14_9 = 11,
+ AV_AFD_4_3_SP_14_9 = 13,
+ AV_AFD_16_9_SP_14_9 = 14,
+ AV_AFD_SP_4_3 = 15,
+};
+
+
+/**
+ * Structure to hold side data for an AVFrame.
+ *
+ * sizeof(AVFrameSideData) is not a part of the public ABI, so new fields may be added
+ * to the end with a minor bump.
+ */
+typedef struct AVFrameSideData {
+ enum AVFrameSideDataType type;
+ uint8_t *data;
+ int size;
+ AVDictionary *metadata;
+ AVBufferRef *buf;
+} AVFrameSideData;
+
+/**
+ * This structure describes decoded (raw) audio or video data.
+ *
+ * AVFrame must be allocated using av_frame_alloc(). Note that this only
+ * allocates the AVFrame itself, the buffers for the data must be managed
+ * through other means (see below).
+ * AVFrame must be freed with av_frame_free().
+ *
+ * AVFrame is typically allocated once and then reused multiple times to hold
+ * different data (e.g. a single AVFrame to hold frames received from a
+ * decoder). In such a case, av_frame_unref() will free any references held by
+ * the frame and reset it to its original clean state before it
+ * is reused again.
+ *
+ * The data described by an AVFrame is usually reference counted through the
+ * AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
+ * AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
+ * least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
+ * every single data plane must be contained in one of the buffers in
+ * AVFrame.buf or AVFrame.extended_buf.
+ * There may be a single buffer for all the data, or one separate buffer for
+ * each plane, or anything in between.
+ *
+ * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
+ * to the end with a minor bump.
+ *
+ * Fields can be accessed through AVOptions, the name string used, matches the
+ * C structure field name for fields accessible through AVOptions. The AVClass
+ * for AVFrame can be obtained from avcodec_get_frame_class()
+ */
+typedef struct AVFrame {
+#define AV_NUM_DATA_POINTERS 8
+ /**
+ * pointer to the picture/channel planes.
+ * This might be different from the first allocated byte
+ *
+ * Some decoders access areas outside 0,0 - width,height, please
+ * see avcodec_align_dimensions2(). Some filters and swscale can read
+ * up to 16 bytes beyond the planes, if these filters are to be used,
+ * then 16 extra bytes must be allocated.
+ *
+ * NOTE: Except for hwaccel formats, pointers not needed by the format
+ * MUST be set to NULL.
+ */
+ uint8_t *data[AV_NUM_DATA_POINTERS];
+
+ /**
+ * For video, size in bytes of each picture line.
+ * For audio, size in bytes of each plane.
+ *
+ * For audio, only linesize[0] may be set. For planar audio, each channel
+ * plane must be the same size.
+ *
+ * For video the linesizes should be multiples of the CPUs alignment
+ * preference, this is 16 or 32 for modern desktop CPUs.
+ * Some code requires such alignment other code can be slower without
+ * correct alignment, for yet other it makes no difference.
+ *
+ * @note The linesize may be larger than the size of usable data -- there
+ * may be extra padding present for performance reasons.
+ */
+ int linesize[AV_NUM_DATA_POINTERS];
+
+ /**
+ * pointers to the data planes/channels.
+ *
+ * For video, this should simply point to data[].
+ *
+ * For planar audio, each channel has a separate data pointer, and
+ * linesize[0] contains the size of each channel buffer.
+ * For packed audio, there is just one data pointer, and linesize[0]
+ * contains the total size of the buffer for all channels.
+ *
+ * Note: Both data and extended_data should always be set in a valid frame,
+ * but for planar audio with more channels that can fit in data,
+ * extended_data must be used in order to access all channels.
+ */
+ uint8_t **extended_data;
+
+ /**
+ * @name Video dimensions
+ * Video frames only. The coded dimensions (in pixels) of the video frame,
+ * i.e. the size of the rectangle that contains some well-defined values.
+ *
+ * @note The part of the frame intended for display/presentation is further
+ * restricted by the @ref cropping "Cropping rectangle".
+ * @{
+ */
+ int width, height;
+ /**
+ * @}
+ */
+
+ /**
+ * number of audio samples (per channel) described by this frame
+ */
+ int nb_samples;
+
+ /**
+ * format of the frame, -1 if unknown or unset
+ * Values correspond to enum AVPixelFormat for video frames,
+ * enum AVSampleFormat for audio)
+ */
+ int format;
+
+ /**
+ * 1 -> keyframe, 0-> not
+ */
+ int key_frame;
+
+ /**
+ * Picture type of the frame.
+ */
+ enum AVPictureType pict_type;
+
+ /**
+ * Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
+ */
+ AVRational sample_aspect_ratio;
+
+ /**
+ * Presentation timestamp in time_base units (time when frame should be shown to user).
+ */
+ int64_t pts;
+
+#if FF_API_PKT_PTS
+ /**
+ * PTS copied from the AVPacket that was decoded to produce this frame.
+ * @deprecated use the pts field instead
+ */
+ attribute_deprecated
+ int64_t pkt_pts;
+#endif
+
+ /**
+ * DTS copied from the AVPacket that triggered returning this frame. (if frame threading isn't used)
+ * This is also the Presentation time of this AVFrame calculated from
+ * only AVPacket.dts values without pts values.
+ */
+ int64_t pkt_dts;
+
+ /**
+ * picture number in bitstream order
+ */
+ int coded_picture_number;
+ /**
+ * picture number in display order
+ */
+ int display_picture_number;
+
+ /**
+ * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
+ */
+ int quality;
+
+ /**
+ * for some private data of the user
+ */
+ void *opaque;
+
+#if FF_API_ERROR_FRAME
+ /**
+ * @deprecated unused
+ */
+ attribute_deprecated
+ uint64_t error[AV_NUM_DATA_POINTERS];
+#endif
+
+ /**
+ * When decoding, this signals how much the picture must be delayed.
+ * extra_delay = repeat_pict / (2*fps)
+ */
+ int repeat_pict;
+
+ /**
+ * The content of the picture is interlaced.
+ */
+ int interlaced_frame;
+
+ /**
+ * If the content is interlaced, is top field displayed first.
+ */
+ int top_field_first;
+
+ /**
+ * Tell user application that palette has changed from previous frame.
+ */
+ int palette_has_changed;
+
+ /**
+ * reordered opaque 64 bits (generally an integer or a double precision float
+ * PTS but can be anything).
+ * The user sets AVCodecContext.reordered_opaque to represent the input at
+ * that time,
+ * the decoder reorders values as needed and sets AVFrame.reordered_opaque
+ * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
+ * @deprecated in favor of pkt_pts
+ */
+ int64_t reordered_opaque;
+
+ /**
+ * Sample rate of the audio data.
+ */
+ int sample_rate;
+
+ /**
+ * Channel layout of the audio data.
+ */
+ uint64_t channel_layout;
+
+ /**
+ * AVBuffer references backing the data for this frame. If all elements of
+ * this array are NULL, then this frame is not reference counted. This array
+ * must be filled contiguously -- if buf[i] is non-NULL then buf[j] must
+ * also be non-NULL for all j < i.
+ *
+ * There may be at most one AVBuffer per data plane, so for video this array
+ * always contains all the references. For planar audio with more than
+ * AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
+ * this array. Then the extra AVBufferRef pointers are stored in the
+ * extended_buf array.
+ */
+ AVBufferRef *buf[AV_NUM_DATA_POINTERS];
+
+ /**
+ * For planar audio which requires more than AV_NUM_DATA_POINTERS
+ * AVBufferRef pointers, this array will hold all the references which
+ * cannot fit into AVFrame.buf.
+ *
+ * Note that this is different from AVFrame.extended_data, which always
+ * contains all the pointers. This array only contains the extra pointers,
+ * which cannot fit into AVFrame.buf.
+ *
+ * This array is always allocated using av_malloc() by whoever constructs
+ * the frame. It is freed in av_frame_unref().
+ */
+ AVBufferRef **extended_buf;
+ /**
+ * Number of elements in extended_buf.
+ */
+ int nb_extended_buf;
+
+ AVFrameSideData **side_data;
+ int nb_side_data;
+
+/**
+ * @defgroup lavu_frame_flags AV_FRAME_FLAGS
+ * @ingroup lavu_frame
+ * Flags describing additional frame properties.
+ *
+ * @{
+ */
+
+/**
+ * The frame data may be corrupted, e.g. due to decoding errors.
+ */
+#define AV_FRAME_FLAG_CORRUPT (1 << 0)
+/**
+ * A flag to mark the frames which need to be decoded, but shouldn't be output.
+ */
+#define AV_FRAME_FLAG_DISCARD (1 << 2)
+/**
+ * @}
+ */
+
+ /**
+ * Frame flags, a combination of @ref lavu_frame_flags
+ */
+ int flags;
+
+ /**
+ * MPEG vs JPEG YUV range.
+ * - encoding: Set by user
+ * - decoding: Set by libavcodec
+ */
+ enum AVColorRange color_range;
+
+ enum AVColorPrimaries color_primaries;
+
+ enum AVColorTransferCharacteristic color_trc;
+
+ /**
+ * YUV colorspace type.
+ * - encoding: Set by user
+ * - decoding: Set by libavcodec
+ */
+ enum AVColorSpace colorspace;
+
+ enum AVChromaLocation chroma_location;
+
+ /**
+ * frame timestamp estimated using various heuristics, in stream time base
+ * - encoding: unused
+ * - decoding: set by libavcodec, read by user.
+ */
+ int64_t best_effort_timestamp;
+
+ /**
+ * reordered pos from the last AVPacket that has been input into the decoder
+ * - encoding: unused
+ * - decoding: Read by user.
+ */
+ int64_t pkt_pos;
+
+ /**
+ * duration of the corresponding packet, expressed in
+ * AVStream->time_base units, 0 if unknown.
+ * - encoding: unused
+ * - decoding: Read by user.
+ */
+ int64_t pkt_duration;
+
+ /**
+ * metadata.
+ * - encoding: Set by user.
+ * - decoding: Set by libavcodec.
+ */
+ AVDictionary *metadata;
+
+ /**
+ * decode error flags of the frame, set to a combination of
+ * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
+ * were errors during the decoding.
+ * - encoding: unused
+ * - decoding: set by libavcodec, read by user.
+ */
+ int decode_error_flags;
+#define FF_DECODE_ERROR_INVALID_BITSTREAM 1
+#define FF_DECODE_ERROR_MISSING_REFERENCE 2
+
+ /**
+ * number of audio channels, only used for audio.
+ * - encoding: unused
+ * - decoding: Read by user.
+ */
+ int channels;
+
+ /**
+ * size of the corresponding packet containing the compressed
+ * frame.
+ * It is set to a negative value if unknown.
+ * - encoding: unused
+ * - decoding: set by libavcodec, read by user.
+ */
+ int pkt_size;
+
+#if FF_API_FRAME_QP
+ /**
+ * QP table
+ */
+ attribute_deprecated
+ int8_t *qscale_table;
+ /**
+ * QP store stride
+ */
+ attribute_deprecated
+ int qstride;
+
+ attribute_deprecated
+ int qscale_type;
+
+ attribute_deprecated
+ AVBufferRef *qp_table_buf;
+#endif
+ /**
+ * For hwaccel-format frames, this should be a reference to the
+ * AVHWFramesContext describing the frame.
+ */
+ AVBufferRef *hw_frames_ctx;
+
+ /**
+ * AVBufferRef for free use by the API user. FFmpeg will never check the
+ * contents of the buffer ref. FFmpeg calls av_buffer_unref() on it when
+ * the frame is unreferenced. av_frame_copy_props() calls create a new
+ * reference with av_buffer_ref() for the target frame's opaque_ref field.
+ *
+ * This is unrelated to the opaque field, although it serves a similar
+ * 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;
+ /**
+ * @}
+ */
+
+ /**
+ * AVBufferRef for internal use by a single libav* library.
+ * Must not be used to transfer data between libraries.
+ * Has to be NULL when ownership of the frame leaves the respective library.
+ *
+ * Code outside the FFmpeg libs should never check or change the contents of the buffer ref.
+ *
+ * FFmpeg calls av_buffer_unref() on it when the frame is unreferenced.
+ * av_frame_copy_props() calls create a new reference with av_buffer_ref()
+ * for the target frame's private_ref field.
+ */
+ AVBufferRef *private_ref;
+} AVFrame;
+
+#if FF_API_FRAME_GET_SET
+/**
+ * Accessors for some AVFrame fields. These used to be provided for ABI
+ * compatibility, and do not need to be used anymore.
+ */
+attribute_deprecated
+int64_t av_frame_get_best_effort_timestamp(const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_best_effort_timestamp(AVFrame *frame, int64_t val);
+attribute_deprecated
+int64_t av_frame_get_pkt_duration (const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_pkt_duration (AVFrame *frame, int64_t val);
+attribute_deprecated
+int64_t av_frame_get_pkt_pos (const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_pkt_pos (AVFrame *frame, int64_t val);
+attribute_deprecated
+int64_t av_frame_get_channel_layout (const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_channel_layout (AVFrame *frame, int64_t val);
+attribute_deprecated
+int av_frame_get_channels (const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_channels (AVFrame *frame, int val);
+attribute_deprecated
+int av_frame_get_sample_rate (const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_sample_rate (AVFrame *frame, int val);
+attribute_deprecated
+AVDictionary *av_frame_get_metadata (const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_metadata (AVFrame *frame, AVDictionary *val);
+attribute_deprecated
+int av_frame_get_decode_error_flags (const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_decode_error_flags (AVFrame *frame, int val);
+attribute_deprecated
+int av_frame_get_pkt_size(const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_pkt_size(AVFrame *frame, int val);
+#if FF_API_FRAME_QP
+attribute_deprecated
+int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type);
+attribute_deprecated
+int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int type);
+#endif
+attribute_deprecated
+enum AVColorSpace av_frame_get_colorspace(const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_colorspace(AVFrame *frame, enum AVColorSpace val);
+attribute_deprecated
+enum AVColorRange av_frame_get_color_range(const AVFrame *frame);
+attribute_deprecated
+void av_frame_set_color_range(AVFrame *frame, enum AVColorRange val);
+#endif
+
+/**
+ * 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. If equal to 0, alignment will be
+ * chosen automatically for the current CPU. It is highly
+ * recommended to pass 0 here unless you know what you are doing.
+ *
+ * @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);
+
+/**
+ * Add a new side data to a frame from an existing AVBufferRef
+ *
+ * @param frame a frame to which the side data should be added
+ * @param type the type of the added side data
+ * @param buf an AVBufferRef to add as side data. The ownership of
+ * the reference is transferred to the frame.
+ *
+ * @return newly added side data on success, NULL on error. On failure
+ * the frame is unchanged and the AVBufferRef remains owned by
+ * the caller.
+ */
+AVFrameSideData *av_frame_new_side_data_from_buf(AVFrame *frame,
+ enum AVFrameSideDataType type,
+ AVBufferRef *buf);
+
+/**
+ * @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);
+
+
+/**
+ * Flags for frame cropping.
+ */
+enum {
+ /**
+ * Apply the maximum possible cropping, even if it requires setting the
+ * AVFrame.data[] entries to unaligned pointers. Passing unaligned data
+ * to FFmpeg API is generally not allowed, and causes undefined behavior
+ * (such as crashes). You can pass unaligned data only to FFmpeg APIs that
+ * are explicitly documented to accept it. Use this flag only if you
+ * absolutely know what you are doing.
+ */
+ AV_FRAME_CROP_UNALIGNED = 1 << 0,
+};
+
+/**
+ * Crop the given video AVFrame according to its crop_left/crop_top/crop_right/
+ * crop_bottom fields. If cropping is successful, the function will adjust the
+ * data pointers and the width/height fields, and set the crop fields to 0.
+ *
+ * In all cases, the cropping boundaries will be rounded to the inherent
+ * alignment of the pixel format. In some cases, such as for opaque hwaccel
+ * formats, the left/top cropping is ignored. The crop fields are set to 0 even
+ * if the cropping was rounded or ignored.
+ *
+ * @param frame the frame which should be cropped
+ * @param flags Some combination of AV_FRAME_CROP_* flags, or 0.
+ *
+ * @return >= 0 on success, a negative AVERROR on error. If the cropping fields
+ * were invalid, AVERROR(ERANGE) is returned, and nothing is changed.
+ */
+int av_frame_apply_cropping(AVFrame *frame, int flags);
+
+/**
+ * @return a string identifying the side data type
+ */
+const char *av_frame_side_data_name(enum AVFrameSideDataType type);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_FRAME_H */
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