mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
224 lines
8.4 KiB
C
224 lines
8.4 KiB
C
/*
|
|
* generic decoding-related code
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVCODEC_DECODE_H
|
|
#define AVCODEC_DECODE_H
|
|
|
|
#include "libavutil/frame.h"
|
|
#include "libavutil/hwcontext.h"
|
|
|
|
#include "avcodec.h"
|
|
|
|
/**
|
|
* This struct stores per-frame lavc-internal data and is attached to it via
|
|
* private_ref.
|
|
*/
|
|
typedef struct FrameDecodeData {
|
|
/**
|
|
* The callback to perform some delayed processing on the frame right
|
|
* before it is returned to the caller.
|
|
*
|
|
* @note This code is called at some unspecified point after the frame is
|
|
* returned from the decoder's decode/receive_frame call. Therefore it cannot rely
|
|
* on AVCodecContext being in any specific state, so it does not get to
|
|
* access AVCodecContext directly at all. All the state it needs must be
|
|
* stored in the post_process_opaque object.
|
|
*/
|
|
int (*post_process)(void *logctx, AVFrame *frame);
|
|
void *post_process_opaque;
|
|
void (*post_process_opaque_free)(void *opaque);
|
|
|
|
/**
|
|
* Per-frame private data for hwaccels.
|
|
*/
|
|
void *hwaccel_priv;
|
|
void (*hwaccel_priv_free)(void *priv);
|
|
} FrameDecodeData;
|
|
|
|
/**
|
|
* Called by decoders to get the next packet for decoding.
|
|
*
|
|
* @param pkt An empty packet to be filled with data.
|
|
* @return 0 if a new reference has been successfully written to pkt
|
|
* AVERROR(EAGAIN) if no data is currently available
|
|
* AVERROR_EOF if and end of stream has been reached, so no more data
|
|
* will be available
|
|
*/
|
|
int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt);
|
|
|
|
/**
|
|
* Set various frame properties from the provided packet.
|
|
*/
|
|
int ff_decode_frame_props_from_pkt(const AVCodecContext *avctx,
|
|
AVFrame *frame, const AVPacket *pkt);
|
|
|
|
/**
|
|
* Set various frame properties from the codec context / packet data.
|
|
*/
|
|
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame);
|
|
|
|
/**
|
|
* Make sure avctx.hw_frames_ctx is set. If it's not set, the function will
|
|
* try to allocate it from hw_device_ctx. If that is not possible, an error
|
|
* message is printed, and an error code is returned.
|
|
*/
|
|
int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
|
|
enum AVHWDeviceType dev_type);
|
|
|
|
int ff_attach_decode_data(AVFrame *frame);
|
|
|
|
/**
|
|
* Check whether the side-data of src contains a palette of
|
|
* size AVPALETTE_SIZE; if so, copy it to dst and return 1;
|
|
* else return 0.
|
|
* Also emit an error message upon encountering a palette
|
|
* with invalid size.
|
|
*/
|
|
int ff_copy_palette(void *dst, const AVPacket *src, void *logctx);
|
|
|
|
/**
|
|
* Check that the provided frame dimensions are valid and set them on the codec
|
|
* context.
|
|
*/
|
|
int ff_set_dimensions(AVCodecContext *s, int width, int height);
|
|
|
|
/**
|
|
* Check that the provided sample aspect ratio is valid and set it on the codec
|
|
* context.
|
|
*/
|
|
int ff_set_sar(AVCodecContext *avctx, AVRational sar);
|
|
|
|
/**
|
|
* Select the (possibly hardware accelerated) pixel format.
|
|
* This is a wrapper around AVCodecContext.get_format() and should be used
|
|
* instead of calling get_format() directly.
|
|
*
|
|
* The list of pixel formats must contain at least one valid entry, and is
|
|
* terminated with AV_PIX_FMT_NONE. If it is possible to decode to software,
|
|
* the last entry in the list must be the most accurate software format.
|
|
* If it is not possible to decode to software, AVCodecContext.sw_pix_fmt
|
|
* must be set before calling this function.
|
|
*/
|
|
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt);
|
|
|
|
/**
|
|
* Get a buffer for a frame. This is a wrapper around
|
|
* AVCodecContext.get_buffer() and should be used instead calling get_buffer()
|
|
* directly.
|
|
*/
|
|
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags);
|
|
|
|
#define FF_REGET_BUFFER_FLAG_READONLY 1 ///< the returned buffer does not need to be writable
|
|
/**
|
|
* Identical in function to ff_get_buffer(), except it reuses the existing buffer
|
|
* if available.
|
|
*/
|
|
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags);
|
|
|
|
/**
|
|
* Add or update AV_FRAME_DATA_MATRIXENCODING side data.
|
|
*/
|
|
int ff_side_data_update_matrix_encoding(AVFrame *frame,
|
|
enum AVMatrixEncoding matrix_encoding);
|
|
|
|
/**
|
|
* Allocate a hwaccel frame private data if the provided avctx
|
|
* uses a hwaccel method that needs it. The returned data is
|
|
* a RefStruct reference (if allocated).
|
|
*
|
|
* @param avctx The codec context
|
|
* @param hwaccel_picture_private Pointer to return hwaccel_picture_private
|
|
* @return 0 on success, < 0 on error
|
|
*/
|
|
int ff_hwaccel_frame_priv_alloc(AVCodecContext *avctx, void **hwaccel_picture_private);
|
|
|
|
/**
|
|
* Get side data of the given type from a decoding context.
|
|
*/
|
|
const AVPacketSideData *ff_get_coded_side_data(const AVCodecContext *avctx,
|
|
enum AVPacketSideDataType type);
|
|
|
|
/**
|
|
* Wrapper around av_frame_new_side_data, which rejects side data overridden by
|
|
* the demuxer. Returns 0 on success, and a negative error code otherwise.
|
|
* If successful and sd is not NULL, *sd may either contain a pointer to the new
|
|
* side data, or NULL in case the side data was already present.
|
|
*/
|
|
int ff_frame_new_side_data(const AVCodecContext *avctx, AVFrame *frame,
|
|
enum AVFrameSideDataType type, size_t size,
|
|
AVFrameSideData **sd);
|
|
|
|
/**
|
|
* Similar to `ff_frame_new_side_data`, but using an existing buffer ref.
|
|
*
|
|
* *buf is ALWAYS consumed by this function and NULL written in its place, even
|
|
* on failure.
|
|
*/
|
|
int ff_frame_new_side_data_from_buf(const AVCodecContext *avctx,
|
|
AVFrame *frame, enum AVFrameSideDataType type,
|
|
AVBufferRef **buf);
|
|
|
|
/**
|
|
* Same as `ff_frame_new_side_data_from_buf`, but taking a AVFrameSideData
|
|
* array directly instead of an AVFrame.
|
|
*/
|
|
int ff_frame_new_side_data_from_buf_ext(const AVCodecContext *avctx,
|
|
AVFrameSideData ***sd, int *nb_sd,
|
|
enum AVFrameSideDataType type,
|
|
AVBufferRef **buf);
|
|
|
|
struct AVMasteringDisplayMetadata;
|
|
struct AVContentLightMetadata;
|
|
|
|
/**
|
|
* Wrapper around av_mastering_display_metadata_create_side_data(), which
|
|
* rejects side data overridden by the demuxer. Returns 0 on success, and a
|
|
* negative error code otherwise. If successful, *mdm may either be a pointer to
|
|
* the new side data, or NULL in case the side data was already present.
|
|
*/
|
|
int ff_decode_mastering_display_new(const AVCodecContext *avctx, AVFrame *frame,
|
|
struct AVMasteringDisplayMetadata **mdm);
|
|
|
|
/**
|
|
* Same as `ff_decode_mastering_display_new`, but taking a AVFrameSideData
|
|
* array directly instead of an AVFrame.
|
|
*/
|
|
int ff_decode_mastering_display_new_ext(const AVCodecContext *avctx,
|
|
AVFrameSideData ***sd, int *nb_sd,
|
|
struct AVMasteringDisplayMetadata **mdm);
|
|
|
|
/**
|
|
* Wrapper around av_content_light_metadata_create_side_data(), which
|
|
* rejects side data overridden by the demuxer. Returns 0 on success, and a
|
|
* negative error code otherwise. If successful, *clm may either be a pointer to
|
|
* the new side data, or NULL in case the side data was already present.
|
|
*/
|
|
int ff_decode_content_light_new(const AVCodecContext *avctx, AVFrame *frame,
|
|
struct AVContentLightMetadata **clm);
|
|
|
|
/**
|
|
* Same as `ff_decode_content_light_new`, but taking a AVFrameSideData
|
|
* array directly instead of an AVFrame.
|
|
*/
|
|
int ff_decode_content_light_new_ext(const AVCodecContext *avctx,
|
|
AVFrameSideData ***sd, int *nb_sd,
|
|
struct AVContentLightMetadata **clm);
|
|
#endif /* AVCODEC_DECODE_H */
|