FFmpeg
rv34.h
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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 "libavutil/mem_internal.h"
31 
32 #include "avcodec.h"
33 #include "mpegvideo.h"
34 
35 #include "h264pred.h"
36 #include "rv34dsp.h"
37 
38 #define MB_TYPE_SEPARATE_DC 0x01000000
39 #define IS_SEPARATE_DC(a) ((a) & MB_TYPE_SEPARATE_DC)
40 
41 /**
42  * RV30 and RV40 Macroblock types
43  */
45  RV34_MB_TYPE_INTRA, ///< Intra macroblock
46  RV34_MB_TYPE_INTRA16x16, ///< Intra macroblock with DCs in a separate 4x4 block
47  RV34_MB_P_16x16, ///< P-frame macroblock, one motion frame
48  RV34_MB_P_8x8, ///< P-frame macroblock, 8x8 motion compensation partitions
49  RV34_MB_B_FORWARD, ///< B-frame macroblock, forward prediction
50  RV34_MB_B_BACKWARD, ///< B-frame macroblock, backward prediction
51  RV34_MB_SKIP, ///< Skipped block
52  RV34_MB_B_DIRECT, ///< Bidirectionally predicted B-frame macroblock, no motion vectors
53  RV34_MB_P_16x8, ///< P-frame macroblock, 16x8 motion compensation partitions
54  RV34_MB_P_8x16, ///< P-frame macroblock, 8x16 motion compensation partitions
55  RV34_MB_B_BIDIR, ///< Bidirectionally predicted B-frame macroblock, two motion vectors
56  RV34_MB_P_MIX16x16, ///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector
58 };
59 
60 /**
61  * VLC tables used by the decoder
62  *
63  * Intra frame VLC sets do not contain some of those tables.
64  */
65 typedef struct RV34VLC{
66  VLC cbppattern[2]; ///< VLCs used for pattern of coded block patterns decoding
67  VLC cbp[2][4]; ///< VLCs used for coded block patterns decoding
68  VLC first_pattern[4]; ///< VLCs used for decoding coefficients in the first subblock
69  VLC second_pattern[2]; ///< VLCs used for decoding coefficients in the subblocks 2 and 3
70  VLC third_pattern[2]; ///< VLCs used for decoding coefficients in the last subblock
71  VLC coefficient; ///< VLCs used for decoding big coefficients
72 }RV34VLC;
73 
74 /** essential slice information */
75 typedef struct SliceInfo{
76  int type; ///< slice type (intra, inter)
77  int quant; ///< quantizer used for this slice
78  int vlc_set; ///< VLCs used for this slice
79  int start, end; ///< start and end macroblocks of the slice
80  int width; ///< coded width
81  int height; ///< coded height
82  int pts; ///< frame timestamp
83 }SliceInfo;
84 
85 /** decoder context */
86 typedef struct RV34DecContext{
89  int8_t *intra_types_hist;///< old block types, used for prediction
90  int8_t *intra_types; ///< block types
91  int intra_types_stride;///< block types array stride
92  const uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes
93  const uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes
94 
95  RV34VLC *cur_vlcs; ///< VLC set used for current frame decoding
96  H264PredContext h; ///< functions for 4x4 and 16x16 intra block prediction
97  SliceInfo si; ///< current slice information
98 
99  int *mb_type; ///< internal macroblock types
100  int block_type; ///< current block type
101  int luma_vlc; ///< which VLC set will be used for decoding of luma blocks
102  int chroma_vlc; ///< which VLC set will be used for decoding of chroma blocks
103  int is16; ///< current block has additional 16x16 specific features or not
104  int dmv[4][2]; ///< differential motion vectors for the current macroblock
105 
106  int rv30; ///< indicates which RV variant is currently decoded
107  int max_rpr;
108 
109  int cur_pts, last_pts, next_pts;
111  int weight1, weight2; ///< B-frame distance fractions (0.14) used in motion compensation
112  int mv_weight1, mv_weight2;
113 
114  int orig_width, orig_height;
115 
116  uint16_t *cbp_luma; ///< CBP values for luma subblocks
117  uint8_t *cbp_chroma; ///< CBP values for chroma subblocks
118  uint16_t *deblock_coefs; ///< deblock coefficients for each macroblock
119 
120  /** 8x8 block available flags (for MV prediction) */
121  DECLARE_ALIGNED(8, uint32_t, avail_cache)[3*4];
122 
123  /** temporary blocks for RV4 weighted MC */
124  uint8_t *tmp_b_block_y[2];
125  uint8_t *tmp_b_block_uv[4];
127 
128  int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si);
130  int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst);
131  void (*loop_filter)(struct RV34DecContext *r, int row);
133 
134 /**
135  * common decoding functions
136  */
137 int ff_rv34_get_start_offset(GetBitContext *gb, int blocks);
139 int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt);
142 
143 #endif /* AVCODEC_RV34_H */
P-frame macroblock with DCs in a separate 4x4 block, one motion vector.
Definition: rv34.h:56
int orig_width
Definition: rv34.h:114
int vlc_set
VLCs used for this slice.
Definition: rv34.h:78
VLC second_pattern[2]
VLCs used for decoding coefficients in the subblocks 2 and 3.
Definition: rv34.h:69
P-frame macroblock, 16x8 motion compensation partitions.
Definition: rv34.h:53
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
B-frame macroblock, forward prediction.
Definition: rv34.h:49
Bidirectionally predicted B-frame macroblock, two motion vectors.
Definition: rv34.h:55
MpegEncContext s
Definition: rv34.h:87
int height
coded height
Definition: rv34.h:81
Bidirectionally predicted B-frame macroblock, no motion vectors.
Definition: rv34.h:52
int ff_rv34_decode_init(AVCodecContext *avctx)
Initialize decoder.
Definition: rv34.c:1485
RV40BlockTypes
RV30 and RV40 Macroblock types.
Definition: rv34.h:44
mpegvideo header.
VLC cbppattern[2]
VLCs used for pattern of coded block patterns decoding.
Definition: rv34.h:66
int weight2
B-frame distance fractions (0.14) used in motion compensation.
Definition: rv34.h:111
int start
Definition: rv34.h:79
const uint8_t * luma_dc_quant_p
luma subblock DC quantizer for interframes
Definition: rv34.h:93
uint8_t * tmp_b_block_base
Definition: rv34.h:126
int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: rv34.c:1524
uint8_t
int scaled_weight
Definition: rv34.h:110
uint16_t * cbp_luma
CBP values for luma subblocks.
Definition: rv34.h:116
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
static int64_t last_pts
int width
coded width
Definition: rv34.h:80
uint16_t * deblock_coefs
deblock coefficients for each macroblock
Definition: rv34.h:118
Context for storing H.264 prediction functions.
Definition: h264pred.h:92
int max_rpr
Definition: rv34.h:107
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:117
Skipped block.
Definition: rv34.h:51
P-frame macroblock, 8x16 motion compensation partitions.
Definition: rv34.h:54
int ff_rv34_decode_end(AVCodecContext *avctx)
Definition: rv34.c:1811
#define src
Definition: vp8dsp.c:255
int quant
quantizer used for this slice
Definition: rv34.h:77
RV30/40 decoder motion compensation functions.
const char * r
Definition: vf_curves.c:114
int luma_vlc
which VLC set will be used for decoding of luma blocks
Definition: rv34.h:101
int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: rv34.c:1605
VLC tables used by the decoder.
Definition: rv34.h:65
Definition: vlc.h:26
Intra macroblock with DCs in a separate 4x4 block.
Definition: rv34.h:46
int * mb_type
internal macroblock types
Definition: rv34.h:99
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
H264PredContext h
functions for 4x4 and 16x16 intra block prediction
Definition: rv34.h:96
VLC coefficient
VLCs used for decoding big coefficients.
Definition: rv34.h:71
VLC first_pattern[4]
VLCs used for decoding coefficients in the first subblock.
Definition: rv34.h:68
essential slice information
Definition: rv34.h:75
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:531
RV34VLC * cur_vlcs
VLC set used for current frame decoding.
Definition: rv34.h:95
SliceInfo si
current slice information
Definition: rv34.h:97
P-frame macroblock, 8x8 motion compensation partitions.
Definition: rv34.h:48
VLC cbp[2][4]
VLCs used for coded block patterns decoding.
Definition: rv34.h:67
int intra_types_stride
block types array stride
Definition: rv34.h:91
int(* decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst)
Definition: rv34.h:130
int is16
current block has additional 16x16 specific features or not
Definition: rv34.h:103
H.264 / AVC / MPEG-4 prediction functions.
int8_t * intra_types
block types
Definition: rv34.h:90
P-frame macroblock, one motion frame.
Definition: rv34.h:47
int ff_rv34_get_start_offset(GetBitContext *gb, int blocks)
common decoding functions
Definition: rv34.c:322
MpegEncContext.
Definition: mpegvideo.h:81
int
int mv_weight2
Definition: rv34.h:112
B-frame macroblock, backward prediction.
Definition: rv34.h:50
VLC third_pattern[2]
VLCs used for decoding coefficients in the last subblock.
Definition: rv34.h:70
static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx)
Decode information (block type, cbp, quant delta, motion vector) for all macroblocks in the current t...
Definition: indeo4.c:469
decoder context
Definition: rv34.h:86
int block_type
current block type
Definition: rv34.h:100
int next_pts
Definition: rv34.h:109
const uint8_t * luma_dc_quant_i
luma subblock DC quantizer for intraframes
Definition: rv34.h:92
int8_t * intra_types_hist
old block types, used for prediction
Definition: rv34.h:89
int type
slice type (intra, inter)
Definition: rv34.h:76
int rv30
indicates which RV variant is currently decoded
Definition: rv34.h:106
static void loop_filter(const H264Context *h, H264SliceContext *sl, int start_x, int end_x)
Definition: h264_slice.c:2452
This structure stores compressed data.
Definition: packet.h:340
Intra macroblock.
Definition: rv34.h:45
int chroma_vlc
which VLC set will be used for decoding of chroma blocks
Definition: rv34.h:102
RV34DSPContext rdsp
Definition: rv34.h:88
int pts
frame timestamp
Definition: rv34.h:82
uint8_t * cbp_chroma
CBP values for chroma subblocks.
Definition: rv34.h:117