1/*
2 * RV30/40 decoder common data declarations
3 * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 "dsputil.h"
32#include "mpegvideo.h"
33
34#include "h264pred.h"
35#include "rv34dsp.h"
36
37#define MB_TYPE_SEPARATE_DC 0x01000000
38#define IS_SEPARATE_DC(a)   ((a) & MB_TYPE_SEPARATE_DC)
39
40/**
41 * RV30 and RV40 Macroblock types
42 */
43enum RV40BlockTypes{
44    RV34_MB_TYPE_INTRA,      ///< Intra macroblock
45    RV34_MB_TYPE_INTRA16x16, ///< Intra macroblock with DCs in a separate 4x4 block
46    RV34_MB_P_16x16,         ///< P-frame macroblock, one motion frame
47    RV34_MB_P_8x8,           ///< P-frame macroblock, 8x8 motion compensation partitions
48    RV34_MB_B_FORWARD,       ///< B-frame macroblock, forward prediction
49    RV34_MB_B_BACKWARD,      ///< B-frame macroblock, backward prediction
50    RV34_MB_SKIP,            ///< Skipped block
51    RV34_MB_B_DIRECT,        ///< Bidirectionally predicted B-frame macroblock, no motion vectors
52    RV34_MB_P_16x8,          ///< P-frame macroblock, 16x8 motion compensation partitions
53    RV34_MB_P_8x16,          ///< P-frame macroblock, 8x16 motion compensation partitions
54    RV34_MB_B_BIDIR,         ///< Bidirectionally predicted B-frame macroblock, two motion vectors
55    RV34_MB_P_MIX16x16,      ///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector
56    RV34_MB_TYPES
57};
58
59/**
60 * VLC tables used by the decoder
61 *
62 * Intra frame VLC sets do not contain some of those tables.
63 */
64typedef struct RV34VLC{
65    VLC cbppattern[2];     ///< VLCs used for pattern of coded block patterns decoding
66    VLC cbp[2][4];         ///< VLCs used for coded block patterns decoding
67    VLC first_pattern[4];  ///< VLCs used for decoding coefficients in the first subblock
68    VLC second_pattern[2]; ///< VLCs used for decoding coefficients in the subblocks 2 and 3
69    VLC third_pattern[2];  ///< VLCs used for decoding coefficients in the last subblock
70    VLC coefficient;       ///< VLCs used for decoding big coefficients
71}RV34VLC;
72
73/** essential slice information */
74typedef struct SliceInfo{
75    int type;              ///< slice type (intra, inter)
76    int quant;             ///< quantizer used for this slice
77    int vlc_set;           ///< VLCs used for this slice
78    int start, end;        ///< start and end macroblocks of the slice
79    int width;             ///< coded width
80    int height;            ///< coded height
81    int pts;               ///< frame timestamp
82}SliceInfo;
83
84/** decoder context */
85typedef struct RV34DecContext{
86    MpegEncContext s;
87    RV34DSPContext rdsp;
88    int8_t *intra_types_hist;///< old block types, used for prediction
89    int8_t *intra_types;     ///< block types
90    int    intra_types_stride;///< block types array stride
91    const uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes
92    const uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes
93
94    RV34VLC *cur_vlcs;       ///< VLC set used for current frame decoding
95    H264PredContext h;       ///< functions for 4x4 and 16x16 intra block prediction
96    SliceInfo si;            ///< current slice information
97
98    int *mb_type;            ///< internal macroblock types
99    int block_type;          ///< current block type
100    int luma_vlc;            ///< which VLC set will be used for decoding of luma blocks
101    int chroma_vlc;          ///< which VLC set will be used for decoding of chroma blocks
102    int is16;                ///< current block has additional 16x16 specific features or not
103    int dmv[4][2];           ///< differential motion vectors for the current macroblock
104
105    int rv30;                ///< indicates which RV variasnt is currently decoded
106    int rpr;                 ///< one field size in RV30 slice header
107
108    int cur_pts, last_pts, next_pts;
109    int weight1, weight2;    ///< B frame distance fractions (0.14) used in motion compensation
110
111    uint16_t *cbp_luma;      ///< CBP values for luma subblocks
112    uint8_t  *cbp_chroma;    ///< CBP values for chroma subblocks
113    int      *deblock_coefs; ///< deblock coefficients for each macroblock
114
115    /** 8x8 block available flags (for MV prediction) */
116    DECLARE_ALIGNED(8, uint32_t, avail_cache)[3*4];
117
118    /** temporary blocks for RV4 weighted MC */
119    uint8_t *tmp_b_block_y[2];
120    uint8_t *tmp_b_block_uv[4];
121    uint8_t *tmp_b_block_base;
122
123    int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si);
124    int (*decode_mb_info)(struct RV34DecContext *r);
125    int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst);
126    void (*loop_filter)(struct RV34DecContext *r, int row);
127}RV34DecContext;
128
129/**
130 * common decoding functions
131 */
132int ff_rv34_get_start_offset(GetBitContext *gb, int blocks);
133int ff_rv34_decode_init(AVCodecContext *avctx);
134int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt);
135int ff_rv34_decode_end(AVCodecContext *avctx);
136int ff_rv34_decode_init_thread_copy(AVCodecContext *avctx);
137int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
138
139#endif /* AVCODEC_RV34_H */
140