video_enc_params.h File Reference

#include <stddef.h>
#include <stdint.h>
#include "libavutil/avassert.h"
#include "libavutil/frame.h"

Go to the source code of this file.

Data Structures
struct	AVVideoEncParams
	Video encoding parameters for a given frame. More...
struct	AVVideoBlockParams
	Data structure for storing block-level encoding information. More...

Enumerations
enum	AVVideoEncParamsType { AV_VIDEO_ENC_PARAMS_NONE = -1, AV_VIDEO_ENC_PARAMS_VP9, AV_VIDEO_ENC_PARAMS_H264, AV_VIDEO_ENC_PARAMS_MPEG2 }

Functions
static av_always_inline AVVideoBlockParams *	av_video_enc_params_block (AVVideoEncParams *par, unsigned int idx)
	Get the block at the specified. More...
AVVideoEncParams *	av_video_enc_params_alloc (enum AVVideoEncParamsType type, unsigned int nb_blocks, size_t *out_size)
	Allocates memory for AVVideoEncParams of the given type, plus an array of. More...
AVVideoEncParams *	av_video_enc_params_create_side_data (AVFrame *frame, enum AVVideoEncParamsType type, unsigned int nb_blocks)
	Allocates memory for AVEncodeInfoFrame plus an array of. More...

Enumeration Type Documentation

AVVideoEncParamsType

enum AVVideoEncParamsType

Enumerator
AV_VIDEO_ENC_PARAMS_NONE
AV_VIDEO_ENC_PARAMS_VP9	VP9 stores: per-frame base (luma AC) quantizer index, exported as AVVideoEncParams.qp deltas for luma DC, chroma AC and chroma DC, exported in the corresponding entries in AVVideoEncParams.delta_qp per-segment delta, exported as for each block as AVVideoBlockParams.delta_qp To compute the resulting quantizer index for a block: for luma AC, add the base qp and the per-block delta_qp, saturating to unsigned 8-bit. for luma DC and chroma AC/DC, add the corresponding AVVideoBlockParams.delta_qp to the luma AC index, again saturating to unsigned 8-bit.
AV_VIDEO_ENC_PARAMS_H264	H.264 stores: in PPS (per-picture): initial QP_Y (luma) value, exported as AVVideoEncParams.qp delta(s) for chroma QP values (same for both, or each separately), exported as in the corresponding entries in AVVideoEncParams.delta_qp per-slice QP delta, not exported directly, added to the per-MB value per-MB delta; not exported directly; the final per-MB quantizer parameter - QP_Y - minus the value in AVVideoEncParams.qp is exported as AVVideoBlockParams.qp_delta.
AV_VIDEO_ENC_PARAMS_MPEG2

Definition at line 28 of file video_enc_params.h.

Function Documentation

av_video_enc_params_block()

static av_always_inline AVVideoBlockParams* av_video_enc_params_block ( AVVideoEncParams *  par, unsigned int  idx  )

static

Get the block at the specified.

idx 

. Must be between 0 and nb_blocks - 1.

Definition at line 143 of file video_enc_params.h.

Referenced by ff_mpv_export_qp_table(), ff_qp_table_extract(), filter_frame(), h264_export_enc_params(), process_frame(), and vp9_export_enc_params().

av_video_enc_params_alloc()

AVVideoEncParams* av_video_enc_params_alloc	(	enum AVVideoEncParamsType	type,
		unsigned int	nb_blocks,
		size_t *	out_size
	)

Allocates memory for AVVideoEncParams of the given type, plus an array of.

nb_blocks 

AVVideoBlockParams and initializes the variables. Can be freed with a normal av_free() call.

Parameters

out_size

if non-NULL, the size in bytes of the resulting data array is written here.

Definition at line 27 of file video_enc_params.c.

Referenced by av_video_enc_params_create_side_data().

av_video_enc_params_create_side_data()

AVVideoEncParams* av_video_enc_params_create_side_data	(	AVFrame *	frame,
		enum AVVideoEncParamsType	type,
		unsigned int	nb_blocks
	)

Allocates memory for AVEncodeInfoFrame plus an array of.

nb_blocks 

AVEncodeInfoBlock in the given AVFrame

frame 

as AVFrameSideData of type AV_FRAME_DATA_VIDEO_ENC_PARAMS and initializes the variables.

Definition at line 58 of file video_enc_params.c.

Referenced by ff_mpv_export_qp_table(), filter_frame(), h264_export_enc_params(), and vp9_export_enc_params().