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 "avcodec.h" 31 #include "mpegvideo.h" 32 33 #include "h264pred.h" 34 #include "rv34dsp.h" 35 36 #define MB_TYPE_SEPARATE_DC 0x01000000 37 #define IS_SEPARATE_DC(a) ((a) & MB_TYPE_SEPARATE_DC) 38 39 /** 40 * RV30 and RV40 Macroblock types 41 */ 42 enum RV40BlockTypes{ 43 RV34_MB_TYPE_INTRA, ///< Intra macroblock 44 RV34_MB_TYPE_INTRA16x16, ///< Intra macroblock with DCs in a separate 4x4 block 45 RV34_MB_P_16x16, ///< P-frame macroblock, one motion frame 46 RV34_MB_P_8x8, ///< P-frame macroblock, 8x8 motion compensation partitions 47 RV34_MB_B_FORWARD, ///< B-frame macroblock, forward prediction 48 RV34_MB_B_BACKWARD, ///< B-frame macroblock, backward prediction 49 RV34_MB_SKIP, ///< Skipped block 50 RV34_MB_B_DIRECT, ///< Bidirectionally predicted B-frame macroblock, no motion vectors 51 RV34_MB_P_16x8, ///< P-frame macroblock, 16x8 motion compensation partitions 52 RV34_MB_P_8x16, ///< P-frame macroblock, 8x16 motion compensation partitions 53 RV34_MB_B_BIDIR, ///< Bidirectionally predicted B-frame macroblock, two motion vectors 54 RV34_MB_P_MIX16x16, ///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector 55 RV34_MB_TYPES 56 }; 57 58 /** 59 * VLC tables used by the decoder 60 * 61 * Intra frame VLC sets do not contain some of those tables. 62 */ 63 typedef struct RV34VLC{ 64 VLC cbppattern[2]; ///< VLCs used for pattern of coded block patterns decoding 65 VLC cbp[2][4]; ///< VLCs used for coded block patterns decoding 66 VLC first_pattern[4]; ///< VLCs used for decoding coefficients in the first subblock 67 VLC second_pattern[2]; ///< VLCs used for decoding coefficients in the subblocks 2 and 3 68 VLC third_pattern[2]; ///< VLCs used for decoding coefficients in the last subblock 69 VLC coefficient; ///< VLCs used for decoding big coefficients 70 }RV34VLC; 71 72 /** essential slice information */ 73 typedef struct SliceInfo{ 74 int type; ///< slice type (intra, inter) 75 int quant; ///< quantizer used for this slice 76 int vlc_set; ///< VLCs used for this slice 77 int start, end; ///< start and end macroblocks of the slice 78 int width; ///< coded width 79 int height; ///< coded height 80 int pts; ///< frame timestamp 81 }SliceInfo; 82 83 /** decoder context */ 84 typedef struct RV34DecContext{ 85 MpegEncContext s; 86 RV34DSPContext rdsp; 87 int8_t *intra_types_hist;///< old block types, used for prediction 88 int8_t *intra_types; ///< block types 89 int intra_types_stride;///< block types array stride 90 const uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes 91 const uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes 92 93 RV34VLC *cur_vlcs; ///< VLC set used for current frame decoding 94 H264PredContext h; ///< functions for 4x4 and 16x16 intra block prediction 95 SliceInfo si; ///< current slice information 96 97 int *mb_type; ///< internal macroblock types 98 int block_type; ///< current block type 99 int luma_vlc; ///< which VLC set will be used for decoding of luma blocks 100 int chroma_vlc; ///< which VLC set will be used for decoding of chroma blocks 101 int is16; ///< current block has additional 16x16 specific features or not 102 int dmv[4][2]; ///< differential motion vectors for the current macroblock 103 104 int rv30; ///< indicates which RV variant is currently decoded 105 int max_rpr; 106 107 int cur_pts, last_pts, next_pts; 108 int scaled_weight; 109 int weight1, weight2; ///< B-frame distance fractions (0.14) used in motion compensation 110 int mv_weight1, mv_weight2; 111 112 int orig_width, orig_height; 113 114 uint16_t *cbp_luma; ///< CBP values for luma subblocks 115 uint8_t *cbp_chroma; ///< CBP values for chroma subblocks 116 uint16_t *deblock_coefs; ///< deblock coefficients for each macroblock 117 118 /** 8x8 block available flags (for MV prediction) */ 119 DECLARE_ALIGNED(8, uint32_t, avail_cache)[3*4]; 120 121 /** temporary blocks for RV4 weighted MC */ 122 uint8_t *tmp_b_block_y[2]; 123 uint8_t *tmp_b_block_uv[4]; 124 uint8_t *tmp_b_block_base; 125 126 int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si); 127 int (*decode_mb_info)(struct RV34DecContext *r); 128 int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst); 129 void (*loop_filter)(struct RV34DecContext *r, int row); 130 }RV34DecContext; 131 132 /** 133 * common decoding functions 134 */ 135 int ff_rv34_get_start_offset(GetBitContext *gb, int blocks); 136 int ff_rv34_decode_init(AVCodecContext *avctx); 137 int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt); 138 int ff_rv34_decode_end(AVCodecContext *avctx); 139 int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src); 140 141 #endif /* AVCODEC_RV34_H */ 142