1/* 2 * RV30/40 decoder common data declarations 3 * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file 24 * RV30 and RV40 decoder common data declarations 25 */ 26 27#ifndef AVCODEC_RV34_H 28#define AVCODEC_RV34_H 29 30#include "libavutil/mem_internal.h" 31 32#include "avcodec.h" 33#include "mpegvideo.h" 34 35#include "h264pred.h" 36#include "rv34dsp.h" 37 38#define MB_TYPE_SEPARATE_DC 0x01000000 39#define IS_SEPARATE_DC(a) ((a) & MB_TYPE_SEPARATE_DC) 40 41/** 42 * RV30 and RV40 Macroblock types 43 */ 44enum RV40BlockTypes{ 45 RV34_MB_TYPE_INTRA, ///< Intra macroblock 46 RV34_MB_TYPE_INTRA16x16, ///< Intra macroblock with DCs in a separate 4x4 block 47 RV34_MB_P_16x16, ///< P-frame macroblock, one motion frame 48 RV34_MB_P_8x8, ///< P-frame macroblock, 8x8 motion compensation partitions 49 RV34_MB_B_FORWARD, ///< B-frame macroblock, forward prediction 50 RV34_MB_B_BACKWARD, ///< B-frame macroblock, backward prediction 51 RV34_MB_SKIP, ///< Skipped block 52 RV34_MB_B_DIRECT, ///< Bidirectionally predicted B-frame macroblock, no motion vectors 53 RV34_MB_P_16x8, ///< P-frame macroblock, 16x8 motion compensation partitions 54 RV34_MB_P_8x16, ///< P-frame macroblock, 8x16 motion compensation partitions 55 RV34_MB_B_BIDIR, ///< Bidirectionally predicted B-frame macroblock, two motion vectors 56 RV34_MB_P_MIX16x16, ///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector 57 RV34_MB_TYPES 58}; 59 60/** 61 * VLC tables used by the decoder 62 * 63 * Intra frame VLC sets do not contain some of those tables. 64 */ 65typedef struct RV34VLC{ 66 VLC cbppattern[2]; ///< VLCs used for pattern of coded block patterns decoding 67 VLC cbp[2][4]; ///< VLCs used for coded block patterns decoding 68 VLC first_pattern[4]; ///< VLCs used for decoding coefficients in the first subblock 69 VLC second_pattern[2]; ///< VLCs used for decoding coefficients in the subblocks 2 and 3 70 VLC third_pattern[2]; ///< VLCs used for decoding coefficients in the last subblock 71 VLC coefficient; ///< VLCs used for decoding big coefficients 72}RV34VLC; 73 74/** essential slice information */ 75typedef struct SliceInfo{ 76 int type; ///< slice type (intra, inter) 77 int quant; ///< quantizer used for this slice 78 int vlc_set; ///< VLCs used for this slice 79 int start, end; ///< start and end macroblocks of the slice 80 int width; ///< coded width 81 int height; ///< coded height 82 int pts; ///< frame timestamp 83}SliceInfo; 84 85/** decoder context */ 86typedef struct RV34DecContext{ 87 MpegEncContext s; 88 RV34DSPContext rdsp; 89 int8_t *intra_types_hist;///< old block types, used for prediction 90 int8_t *intra_types; ///< block types 91 int intra_types_stride;///< block types array stride 92 const uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes 93 const uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes 94 95 RV34VLC *cur_vlcs; ///< VLC set used for current frame decoding 96 H264PredContext h; ///< functions for 4x4 and 16x16 intra block prediction 97 SliceInfo si; ///< current slice information 98 99 int *mb_type; ///< internal macroblock types 100 int block_type; ///< current block type 101 int luma_vlc; ///< which VLC set will be used for decoding of luma blocks 102 int chroma_vlc; ///< which VLC set will be used for decoding of chroma blocks 103 int is16; ///< current block has additional 16x16 specific features or not 104 int dmv[4][2]; ///< differential motion vectors for the current macroblock 105 106 int rv30; ///< indicates which RV variant is currently decoded 107 int max_rpr; 108 109 int cur_pts, last_pts, next_pts; 110 int scaled_weight; 111 int weight1, weight2; ///< B-frame distance fractions (0.14) used in motion compensation 112 int mv_weight1, mv_weight2; 113 114 int orig_width, orig_height; 115 116 uint16_t *cbp_luma; ///< CBP values for luma subblocks 117 uint8_t *cbp_chroma; ///< CBP values for chroma subblocks 118 uint16_t *deblock_coefs; ///< deblock coefficients for each macroblock 119 120 /** 8x8 block available flags (for MV prediction) */ 121 DECLARE_ALIGNED(8, uint32_t, avail_cache)[3*4]; 122 123 /** temporary blocks for RV4 weighted MC */ 124 uint8_t *tmp_b_block_y[2]; 125 uint8_t *tmp_b_block_uv[4]; 126 uint8_t *tmp_b_block_base; 127 128 int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si); 129 int (*decode_mb_info)(struct RV34DecContext *r); 130 int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst); 131 void (*loop_filter)(struct RV34DecContext *r, int row); 132}RV34DecContext; 133 134/** 135 * common decoding functions 136 */ 137int ff_rv34_get_start_offset(GetBitContext *gb, int blocks); 138int ff_rv34_decode_init(AVCodecContext *avctx); 139int ff_rv34_decode_frame(AVCodecContext *avctx, AVFrame *frame, 140 int *got_frame, AVPacket *avpkt); 141int ff_rv34_decode_end(AVCodecContext *avctx); 142int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src); 143 144#endif /* AVCODEC_RV34_H */ 145