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/*
* Mpeg video formats-related defines and utility functions
*
* 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_MPEGPICTURE_H
#define AVCODEC_MPEGPICTURE_H
#include <stdint.h>
#include "libavutil/frame.h"
#include "avcodec.h"
#include "motion_est.h"
#include "threadframe.h"
#define MPEGVIDEO_MAX_PLANES 4
#define MAX_PICTURE_COUNT 36
#define EDGE_WIDTH 16
typedef struct ScratchpadContext {
uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
uint8_t *obmc_scratchpad;
uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
} ScratchpadContext;
/**
* Picture.
*/
typedef struct Picture {
struct AVFrame *f;
ThreadFrame tf;
AVBufferRef *qscale_table_buf;
int8_t *qscale_table;
AVBufferRef *motion_val_buf[2];
int16_t (*motion_val[2])[2];
AVBufferRef *mb_type_buf;
uint32_t *mb_type; ///< types and macros are defined in mpegutils.h
AVBufferRef *mbskip_table_buf;
uint8_t *mbskip_table;
AVBufferRef *ref_index_buf[2];
int8_t *ref_index[2];
int alloc_mb_width; ///< mb_width used to allocate tables
int alloc_mb_height; ///< mb_height used to allocate tables
int alloc_mb_stride; ///< mb_stride used to allocate tables
/// RefStruct reference for hardware accelerator private data
void *hwaccel_picture_private;
int field_picture; ///< whether or not the picture was encoded in separate fields
int b_frame_score;
int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
int reference;
int shared;
int display_picture_number;
int coded_picture_number;
} Picture;
/**
* Allocate a Picture's accessories, but not the AVFrame's buffer itself.
*/
int ff_alloc_picture(AVCodecContext *avctx, Picture *pic, MotionEstContext *me,
ScratchpadContext *sc, int encoding, int out_format,
int mb_stride, int mb_width, int mb_height, int b8_stride,
ptrdiff_t *linesize, ptrdiff_t *uvlinesize);
int ff_mpeg_framesize_alloc(AVCodecContext *avctx, MotionEstContext *me,
ScratchpadContext *sc, int linesize);
int ff_mpeg_ref_picture(Picture *dst, Picture *src);
void ff_mpeg_unref_picture(Picture *picture);
void ff_mpv_picture_free(Picture *pic);
int ff_update_picture_tables(Picture *dst, const Picture *src);
int ff_find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared);
#endif /* AVCODEC_MPEGPICTURE_H */