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86c4d81506
- compiled with VS2019 (since old DLL used MSVC too) - version n5.1.2 - removed unused config and included binka - removed XP support - comments in config txt - has some crash bugs (to be improved in later commits)
172 lines
5.8 KiB
C
172 lines
5.8 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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#ifndef AVUTIL_VIDEO_ENC_PARAMS_H
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#define AVUTIL_VIDEO_ENC_PARAMS_H
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#include <stddef.h>
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#include <stdint.h>
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#include "libavutil/avassert.h"
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#include "libavutil/frame.h"
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enum AVVideoEncParamsType {
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AV_VIDEO_ENC_PARAMS_NONE = -1,
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/**
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* VP9 stores:
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* - per-frame base (luma AC) quantizer index, exported as AVVideoEncParams.qp
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* - deltas for luma DC, chroma AC and chroma DC, exported in the
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* corresponding entries in AVVideoEncParams.delta_qp
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* - per-segment delta, exported as for each block as AVVideoBlockParams.delta_qp
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*
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* To compute the resulting quantizer index for a block:
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* - for luma AC, add the base qp and the per-block delta_qp, saturating to
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* unsigned 8-bit.
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* - for luma DC and chroma AC/DC, add the corresponding
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* AVVideoBlockParams.delta_qp to the luma AC index, again saturating to
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* unsigned 8-bit.
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*/
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AV_VIDEO_ENC_PARAMS_VP9,
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/**
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* H.264 stores:
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* - in PPS (per-picture):
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* * initial QP_Y (luma) value, exported as AVVideoEncParams.qp
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* * delta(s) for chroma QP values (same for both, or each separately),
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* exported as in the corresponding entries in AVVideoEncParams.delta_qp
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* - per-slice QP delta, not exported directly, added to the per-MB value
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* - per-MB delta; not exported directly; the final per-MB quantizer
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* parameter - QP_Y - minus the value in AVVideoEncParams.qp is exported
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* as AVVideoBlockParams.qp_delta.
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*/
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AV_VIDEO_ENC_PARAMS_H264,
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/*
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* MPEG-2-compatible quantizer.
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*
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* Summing the frame-level qp with the per-block delta_qp gives the
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* resulting quantizer for the block.
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*/
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AV_VIDEO_ENC_PARAMS_MPEG2,
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};
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/**
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* Video encoding parameters for a given frame. This struct is allocated along
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* with an optional array of per-block AVVideoBlockParams descriptors.
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* Must be allocated with av_video_enc_params_alloc().
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*/
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typedef struct AVVideoEncParams {
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/**
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* Number of blocks in the array.
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*
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* May be 0, in which case no per-block information is present. In this case
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* the values of blocks_offset / block_size are unspecified and should not
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* be accessed.
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*/
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unsigned int nb_blocks;
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/**
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* Offset in bytes from the beginning of this structure at which the array
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* of blocks starts.
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*/
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size_t blocks_offset;
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/*
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* Size of each block in bytes. May not match sizeof(AVVideoBlockParams).
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*/
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size_t block_size;
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/**
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* Type of the parameters (the codec they are used with).
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*/
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enum AVVideoEncParamsType type;
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/**
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* Base quantisation parameter for the frame. The final quantiser for a
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* given block in a given plane is obtained from this value, possibly
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* combined with {@code delta_qp} and the per-block delta in a manner
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* documented for each type.
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*/
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int32_t qp;
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/**
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* Quantisation parameter offset from the base (per-frame) qp for a given
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* plane (first index) and AC/DC coefficients (second index).
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*/
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int32_t delta_qp[4][2];
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} AVVideoEncParams;
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/**
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* Data structure for storing block-level encoding information.
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* It is allocated as a part of AVVideoEncParams and should be retrieved with
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* av_video_enc_params_block().
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*
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* sizeof(AVVideoBlockParams) is not a part of the ABI and new fields may be
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* added to it.
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*/
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typedef struct AVVideoBlockParams {
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/**
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* Distance in luma pixels from the top-left corner of the visible frame
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* to the top-left corner of the block.
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* Can be negative if top/right padding is present on the coded frame.
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*/
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int src_x, src_y;
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/**
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* Width and height of the block in luma pixels.
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*/
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int w, h;
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/**
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* Difference between this block's final quantization parameter and the
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* corresponding per-frame value.
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*/
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int32_t delta_qp;
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} AVVideoBlockParams;
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/*
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* Get the block at the specified {@code idx}. Must be between 0 and nb_blocks.
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*/
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static av_always_inline AVVideoBlockParams*
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av_video_enc_params_block(AVVideoEncParams *par, unsigned int idx)
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{
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av_assert0(idx < par->nb_blocks);
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return (AVVideoBlockParams *)((uint8_t *)par + par->blocks_offset +
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idx * par->block_size);
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}
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/**
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* Allocates memory for AVVideoEncParams of the given type, plus an array of
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* {@code nb_blocks} AVVideoBlockParams and initializes the variables. Can be
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* freed with a normal av_free() call.
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*
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* @param out_size if non-NULL, the size in bytes of the resulting data array is
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* written here.
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*/
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AVVideoEncParams *av_video_enc_params_alloc(enum AVVideoEncParamsType type,
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unsigned int nb_blocks, size_t *out_size);
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/**
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* Allocates memory for AVEncodeInfoFrame plus an array of
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* {@code nb_blocks} AVEncodeInfoBlock in the given AVFrame {@code frame}
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* as AVFrameSideData of type AV_FRAME_DATA_VIDEO_ENC_PARAMS
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* and initializes the variables.
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*/
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AVVideoEncParams*
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av_video_enc_params_create_side_data(AVFrame *frame, enum AVVideoEncParamsType type,
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unsigned int nb_blocks);
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#endif /* AVUTIL_VIDEO_ENC_PARAMS_H */
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