2 * RV30/40 decoder common data declarations
3 * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
5 * This file is part of Libav.
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.
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.
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
24 * RV30 and RV40 decoder common data declarations
27 #ifndef AVCODEC_RV34_H
28 #define AVCODEC_RV34_H
32 #include "mpegvideo.h"
37 #define MB_TYPE_SEPARATE_DC 0x01000000
38 #define IS_SEPARATE_DC(a) ((a) & MB_TYPE_SEPARATE_DC)
41 * RV30 and RV40 Macroblock types
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
60 * VLC tables used by the decoder
62 * Intra frame VLC sets do not contain some of those tables.
64 typedef 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
73 /** essential slice information */
74 typedef 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
84 /** decoder context */
85 typedef struct RV34DecContext
{
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
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
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
105 int rv30
; ///< indicates which RV variasnt is currently decoded
106 int rpr
; ///< one field size in RV30 slice header
108 int cur_pts
, last_pts
, next_pts
;
110 int weight1
, weight2
; ///< B frame distance fractions (0.14) used in motion compensation
111 int mv_weight1
, mv_weight2
;
113 uint16_t *cbp_luma
; ///< CBP values for luma subblocks
114 uint8_t *cbp_chroma
; ///< CBP values for chroma subblocks
115 uint16_t *deblock_coefs
; ///< deblock coefficients for each macroblock
117 /** 8x8 block available flags (for MV prediction) */
118 DECLARE_ALIGNED(8, uint32_t, avail_cache
)[3*4];
120 /** temporary blocks for RV4 weighted MC */
121 uint8_t *tmp_b_block_y
[2];
122 uint8_t *tmp_b_block_uv
[4];
123 uint8_t *tmp_b_block_base
;
125 int (*parse_slice_header
)(struct RV34DecContext
*r
, GetBitContext
*gb
, SliceInfo
*si
);
126 int (*decode_mb_info
)(struct RV34DecContext
*r
);
127 int (*decode_intra_types
)(struct RV34DecContext
*r
, GetBitContext
*gb
, int8_t *dst
);
128 void (*loop_filter
)(struct RV34DecContext
*r
, int row
);
132 * common decoding functions
134 int ff_rv34_get_start_offset(GetBitContext
*gb
, int blocks
);
135 int ff_rv34_decode_init(AVCodecContext
*avctx
);
136 int ff_rv34_decode_frame(AVCodecContext
*avctx
, void *data
, int *got_frame
, AVPacket
*avpkt
);
137 int ff_rv34_decode_end(AVCodecContext
*avctx
);
138 int ff_rv34_decode_init_thread_copy(AVCodecContext
*avctx
);
139 int ff_rv34_decode_update_thread_context(AVCodecContext
*dst
, const AVCodecContext
*src
);
141 #endif /* AVCODEC_RV34_H */