Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / rv34.h
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2ba45a60
DM
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 */
42enum 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 */
63typedef 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 */
73typedef 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 */
84typedef 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 variasnt 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 uint16_t *cbp_luma; ///< CBP values for luma subblocks
113 uint8_t *cbp_chroma; ///< CBP values for chroma subblocks
114 uint16_t *deblock_coefs; ///< deblock coefficients for each macroblock
115
116 /** 8x8 block available flags (for MV prediction) */
117 DECLARE_ALIGNED(8, uint32_t, avail_cache)[3*4];
118
119 /** temporary blocks for RV4 weighted MC */
120 uint8_t *tmp_b_block_y[2];
121 uint8_t *tmp_b_block_uv[4];
122 uint8_t *tmp_b_block_base;
123
124 int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si);
125 int (*decode_mb_info)(struct RV34DecContext *r);
126 int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst);
127 void (*loop_filter)(struct RV34DecContext *r, int row);
128}RV34DecContext;
129
130/**
131 * common decoding functions
132 */
133int ff_rv34_get_start_offset(GetBitContext *gb, int blocks);
134int ff_rv34_decode_init(AVCodecContext *avctx);
135int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt);
136int ff_rv34_decode_end(AVCodecContext *avctx);
137int ff_rv34_decode_init_thread_copy(AVCodecContext *avctx);
138int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
139
140#endif /* AVCODEC_RV34_H */