1/* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19#ifndef AVCODEC_INTRAX8_H 20#define AVCODEC_INTRAX8_H 21 22#include "blockdsp.h" 23#include "get_bits.h" 24#include "idctdsp.h" 25#include "intrax8dsp.h" 26#include "wmv2dsp.h" 27#include "mpegpicture.h" 28 29typedef struct IntraX8Context { 30 VLC *j_ac_vlc[4]; // they point to the static j_mb_vlc 31 VLC *j_orient_vlc; 32 VLC *j_dc_vlc[3]; 33 34 int use_quant_matrix; 35 36 // set by ff_intrax8_common_init 37 uint8_t *prediction_table; // 2 * (mb_w * 2) 38 ScanTable scantable[3]; 39 WMV2DSPContext wdsp; 40 uint8_t idct_permutation[64]; 41 AVCodecContext *avctx; 42 int *block_last_index; ///< last nonzero coefficient in block 43 int16_t (*block)[64]; 44 45 // set by the caller codec 46 IntraX8DSPContext dsp; 47 IDCTDSPContext idsp; 48 BlockDSPContext bdsp; 49 int quant; 50 int dquant; 51 int qsum; 52 int loopfilter; 53 AVFrame *frame; 54 GetBitContext *gb; 55 56 // calculated per frame 57 int quant_dc_chroma; 58 int divide_quant_dc_luma; 59 int divide_quant_dc_chroma; 60 uint8_t *dest[3]; 61 uint8_t scratchpad[42]; // size of the block is fixed (8x8 plus padding) 62 63 // changed per block 64 int edges; 65 int flat_dc; 66 int predicted_dc; 67 int raw_orient; 68 int chroma_orient; 69 int orient; 70 int est_run; 71 72 // block props 73 int mb_x, mb_y; 74 int mb_width, mb_height; 75} IntraX8Context; 76 77/** 78 * Initialize IntraX8 frame decoder. 79 * @param avctx pointer to AVCodecContext 80 * @param w pointer to IntraX8Context 81 * @param idsp pointer to IDCTDSPContext 82 * @param block pointer to block array 83 * @param block_last_index pointer to index array 84 * @param mb_width macroblock width 85 * @param mb_height macroblock height 86 * @return 0 on success, a negative AVERROR value on error 87 */ 88int ff_intrax8_common_init(AVCodecContext *avctx, 89 IntraX8Context *w, IDCTDSPContext *idsp, 90 int16_t (*block)[64], 91 int block_last_index[12], 92 int mb_width, int mb_height); 93 94/** 95 * Destroy IntraX8 frame structure. 96 * @param w pointer to IntraX8Context 97 */ 98void ff_intrax8_common_end(IntraX8Context *w); 99 100/** 101 * Decode single IntraX8 frame. 102 * lowres decoding is theoretically impossible. 103 * @param w pointer to IntraX8Context 104 * @param pict the output Picture containing an AVFrame 105 * @param gb open bitstream reader 106 * @param mb_x pointer to the x coordinate of the current macroblock 107 * @param mb_y pointer to the y coordinate of the current macroblock 108 * @param dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1. 109 * @param quant_offset offset away from zero 110 * @param loopfilter enable filter after decoding a block 111 */ 112int ff_intrax8_decode_picture(IntraX8Context *w, Picture *pict, 113 GetBitContext *gb, int *mb_x, int *mb_y, 114 int quant, int halfpq, 115 int loopfilter, int lowdelay); 116 117#endif /* AVCODEC_INTRAX8_H */ 118