115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
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/*
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* Mpeg video formats-related defines and utility functions
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*
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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 AVCODEC_MPEGPICTURE_H
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#define AVCODEC_MPEGPICTURE_H
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#include <stdint.h>
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#include "libavutil/frame.h"
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#include "avcodec.h"
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#include "motion_est.h"
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#include "thread.h"
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#define MAX_PICTURE_COUNT 36
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#define EDGE_WIDTH 16
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typedef struct ScratchpadContext {
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uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
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uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
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uint8_t *obmc_scratchpad;
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uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
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} ScratchpadContext;
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/**
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* Picture.
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*/
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typedef struct Picture {
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struct AVFrame *f;
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ThreadFrame tf;
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AVBufferRef *qscale_table_buf;
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int8_t *qscale_table;
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AVBufferRef *motion_val_buf[2];
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int16_t (*motion_val[2])[2];
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AVBufferRef *mb_type_buf;
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uint32_t *mb_type; ///< types and macros are defined in mpegutils.h
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AVBufferRef *mbskip_table_buf;
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uint8_t *mbskip_table;
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AVBufferRef *ref_index_buf[2];
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int8_t *ref_index[2];
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AVBufferRef *mb_var_buf;
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uint16_t *mb_var; ///< Table for MB variances
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AVBufferRef *mc_mb_var_buf;
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uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
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int alloc_mb_width; ///< mb_width used to allocate tables
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int alloc_mb_height; ///< mb_height used to allocate tables
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AVBufferRef *mb_mean_buf;
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uint8_t *mb_mean; ///< Table for MB luminance
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AVBufferRef *hwaccel_priv_buf;
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void *hwaccel_picture_private; ///< Hardware accelerator private data
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int field_picture; ///< whether or not the picture was encoded in separate fields
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int64_t mb_var_sum; ///< sum of MB variance for current frame
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int64_t mc_mb_var_sum; ///< motion compensated MB variance for current frame
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int b_frame_score;
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int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
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int reference;
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int shared;
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uint64_t encoding_error[AV_NUM_DATA_POINTERS];
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} Picture;
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/**
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* Allocate a Picture.
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* The pixels are allocated/set by calling get_buffer() if shared = 0.
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*/
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int ff_alloc_picture(AVCodecContext *avctx, Picture *pic, MotionEstContext *me,
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ScratchpadContext *sc, int shared, int encoding,
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int chroma_x_shift, int chroma_y_shift, int out_format,
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int mb_stride, int mb_width, int mb_height, int b8_stride,
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ptrdiff_t *linesize, ptrdiff_t *uvlinesize);
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int ff_mpeg_framesize_alloc(AVCodecContext *avctx, MotionEstContext *me,
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ScratchpadContext *sc, int linesize);
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int ff_mpeg_ref_picture(AVCodecContext *avctx, Picture *dst, Picture *src);
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void ff_mpeg_unref_picture(AVCodecContext *avctx, Picture *picture);
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void ff_free_picture_tables(Picture *pic);
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int ff_update_picture_tables(Picture *dst, Picture *src);
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int ff_find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared);
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#endif /* AVCODEC_MPEGPICTURE_H */
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