2 * RV30/40 decoder common data declarations
3 * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
5 * This file is part of FFmpeg.
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.
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.
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
23 * @file libavcodec/rv34.h
24 * RV30 and RV40 decoder common data declarations
27 #ifndef AVCODEC_RV34_H
28 #define AVCODEC_RV34_H
32 #include "mpegvideo.h"
36 #define MB_TYPE_SEPARATE_DC 0x01000000
37 #define IS_SEPARATE_DC(a) ((a) & MB_TYPE_SEPARATE_DC)
40 * RV30 and RV40 Macroblock types
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
59 * VLC tables used by the decoder
61 * Intra frame VLC sets do not contain some of those tables.
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
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
83 /** decoder context */
84 typedef struct RV34DecContext{
86 int8_t *intra_types_hist;///< old block types, used for prediction
87 int8_t *intra_types; ///< block types
88 const uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes
89 const uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes
91 RV34VLC *cur_vlcs; ///< VLC set used for current frame decoding
92 int bits; ///< slice size in bits
93 H264PredContext h; ///< functions for 4x4 and 16x16 intra block prediction
94 SliceInfo si; ///< current slice information
96 int *mb_type; ///< internal macroblock types
97 int block_type; ///< current block type
98 int luma_vlc; ///< which VLC set will be used for decoding of luma blocks
99 int chroma_vlc; ///< which VLC set will be used for decoding of chroma blocks
100 int is16; ///< current block has additional 16x16 specific features or not
101 int dmv[4][2]; ///< differential motion vectors for the current macroblock
103 int rv30; ///< indicates which RV variasnt is currently decoded
104 int rpr; ///< one field size in RV30 slice header
106 int cur_pts, last_pts, next_pts;
108 uint16_t *cbp_luma; ///< CBP values for luma subblocks
109 uint8_t *cbp_chroma; ///< CBP values for chroma subblocks
110 int *deblock_coefs; ///< deblock coefficients for each macroblock
112 /** 8x8 block available flags (for MV prediction) */
113 DECLARE_ALIGNED_8(uint32_t, avail_cache[3*4]);
115 int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si);
116 int (*decode_mb_info)(struct RV34DecContext *r);
117 int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst);
118 void (*loop_filter)(struct RV34DecContext *r, int row);
122 * common decoding functions
124 int ff_rv34_get_start_offset(GetBitContext *gb, int blocks);
125 int ff_rv34_decode_init(AVCodecContext *avctx);
126 int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size);
127 int ff_rv34_decode_end(AVCodecContext *avctx);
129 #endif /* AVCODEC_RV34_H */