forked from KolibriOS/kolibrios
120 lines
4.2 KiB
C
120 lines
4.2 KiB
C
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/*
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* H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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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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/**
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* @file
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* H.264 / AVC / MPEG4 prediction functions.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#ifndef AVCODEC_H264PRED_H
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#define AVCODEC_H264PRED_H
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#include <stddef.h>
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#include <stdint.h>
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/**
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* Prediction types
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*/
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//@{
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#define VERT_PRED 0
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#define HOR_PRED 1
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#define DC_PRED 2
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#define DIAG_DOWN_LEFT_PRED 3
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#define DIAG_DOWN_RIGHT_PRED 4
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#define VERT_RIGHT_PRED 5
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#define HOR_DOWN_PRED 6
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#define VERT_LEFT_PRED 7
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#define HOR_UP_PRED 8
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// DC edge (not for VP8)
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#define LEFT_DC_PRED 9
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#define TOP_DC_PRED 10
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#define DC_128_PRED 11
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// RV40 specific
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#define DIAG_DOWN_LEFT_PRED_RV40_NODOWN 12
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#define HOR_UP_PRED_RV40_NODOWN 13
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#define VERT_LEFT_PRED_RV40_NODOWN 14
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// VP8 specific
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#define TM_VP8_PRED 9 ///< "True Motion", used instead of plane
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#define VERT_VP8_PRED 10 ///< for VP8, #VERT_PRED is the average of
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///< (left col+cur col x2+right col) / 4;
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///< this is the "unaveraged" one
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#define HOR_VP8_PRED 11 ///< unaveraged version of #HOR_PRED, see
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///< #VERT_VP8_PRED for details
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#define DC_127_PRED 12
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#define DC_129_PRED 13
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#define DC_PRED8x8 0
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#define HOR_PRED8x8 1
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#define VERT_PRED8x8 2
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#define PLANE_PRED8x8 3
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// DC edge
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#define LEFT_DC_PRED8x8 4
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#define TOP_DC_PRED8x8 5
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#define DC_128_PRED8x8 6
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// H264/SVQ3 (8x8) specific
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#define ALZHEIMER_DC_L0T_PRED8x8 7
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#define ALZHEIMER_DC_0LT_PRED8x8 8
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#define ALZHEIMER_DC_L00_PRED8x8 9
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#define ALZHEIMER_DC_0L0_PRED8x8 10
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// VP8 specific
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#define DC_127_PRED8x8 7
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#define DC_129_PRED8x8 8
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//@}
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/**
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* Context for storing H.264 prediction functions
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*/
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typedef struct H264PredContext {
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void(*pred4x4[9 + 3 + 3])(uint8_t *src, const uint8_t *topright,
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ptrdiff_t stride);
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void(*pred8x8l[9 + 3])(uint8_t *src, int topleft, int topright,
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ptrdiff_t stride);
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void(*pred8x8[4 + 3 + 4])(uint8_t *src, ptrdiff_t stride);
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void(*pred16x16[4 + 3 + 2])(uint8_t *src, ptrdiff_t stride);
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void(*pred4x4_add[2])(uint8_t *pix /*align 4*/,
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int16_t *block /*align 16*/, ptrdiff_t stride);
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void(*pred8x8l_add[2])(uint8_t *pix /*align 8*/,
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int16_t *block /*align 16*/, ptrdiff_t stride);
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void(*pred8x8_add[3])(uint8_t *pix /*align 8*/,
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const int *block_offset,
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int16_t *block /*align 16*/, ptrdiff_t stride);
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void(*pred16x16_add[3])(uint8_t *pix /*align 16*/,
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const int *block_offset,
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int16_t *block /*align 16*/, ptrdiff_t stride);
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} H264PredContext;
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void ff_h264_pred_init(H264PredContext *h, int codec_id,
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const int bit_depth, const int chroma_format_idc);
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void ff_h264_pred_init_arm(H264PredContext *h, int codec_id,
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const int bit_depth, const int chroma_format_idc);
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void ff_h264_pred_init_x86(H264PredContext *h, int codec_id,
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const int bit_depth, const int chroma_format_idc);
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#endif /* AVCODEC_H264PRED_H */
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