Revision 8e624c1c

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libavcodec/vp8.c
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25 25
#include "libavutil/imgutils.h"
26 26
#include "avcodec.h"
27
#include "vp56.h"
27
#include "vp8.h"
28 28
#include "vp8data.h"
29
#include "vp8dsp.h"
30
#include "h264pred.h"
31 29
#include "rectangle.h"
32 30

  
33 31
#if ARCH_ARM
34 32
#   include "arm/vp8.h"
35 33
#endif
36 34

  
37
typedef struct {
38
    uint8_t filter_level;
39
    uint8_t inner_limit;
40
    uint8_t inner_filter;
41
} VP8FilterStrength;
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43
typedef struct {
44
    uint8_t skip;
45
    // todo: make it possible to check for at least (i4x4 or split_mv)
46
    // in one op. are others needed?
47
    uint8_t mode;
48
    uint8_t ref_frame;
49
    uint8_t partitioning;
50
    VP56mv mv;
51
    VP56mv bmv[16];
52
} VP8Macroblock;
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54
typedef struct {
55
    AVCodecContext *avctx;
56
    DSPContext dsp;
57
    VP8DSPContext vp8dsp;
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    H264PredContext hpc;
59
    vp8_mc_func put_pixels_tab[3][3][3];
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    AVFrame frames[4];
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    AVFrame *framep[4];
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    uint8_t *edge_emu_buffer;
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    VP56RangeCoder c;   ///< header context, includes mb modes and motion vectors
64
    int profile;
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66
    int mb_width;   /* number of horizontal MB */
67
    int mb_height;  /* number of vertical MB */
68
    int linesize;
69
    int uvlinesize;
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71
    int keyframe;
72
    int invisible;
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    int update_last;    ///< update VP56_FRAME_PREVIOUS with the current one
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    int update_golden;  ///< VP56_FRAME_NONE if not updated, or which frame to copy if so
75
    int update_altref;
76
    int deblock_filter;
77

  
78
    /**
79
     * If this flag is not set, all the probability updates
80
     * are discarded after this frame is decoded.
81
     */
82
    int update_probabilities;
83

  
84
    /**
85
     * All coefficients are contained in separate arith coding contexts.
86
     * There can be 1, 2, 4, or 8 of these after the header context.
87
     */
88
    int num_coeff_partitions;
89
    VP56RangeCoder coeff_partition[8];
90

  
91
    VP8Macroblock *macroblocks;
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    VP8Macroblock *macroblocks_base;
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    VP8FilterStrength *filter_strength;
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95
    uint8_t *intra4x4_pred_mode_top;
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    uint8_t intra4x4_pred_mode_left[4];
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    uint8_t *segmentation_map;
98

  
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    /**
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     * Cache of the top row needed for intra prediction
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     * 16 for luma, 8 for each chroma plane
102
     */
103
    uint8_t (*top_border)[16+8+8];
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105
    /**
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     * For coeff decode, we need to know whether the above block had non-zero
107
     * coefficients. This means for each macroblock, we need data for 4 luma
108
     * blocks, 2 u blocks, 2 v blocks, and the luma dc block, for a total of 9
109
     * per macroblock. We keep the last row in top_nnz.
110
     */
111
    uint8_t (*top_nnz)[9];
112
    DECLARE_ALIGNED(8, uint8_t, left_nnz)[9];
113

  
114
    /**
115
     * This is the index plus one of the last non-zero coeff
116
     * for each of the blocks in the current macroblock.
117
     * So, 0 -> no coeffs
118
     *     1 -> dc-only (special transform)
119
     *     2+-> full transform
120
     */
121
    DECLARE_ALIGNED(16, uint8_t, non_zero_count_cache)[6][4];
122
    DECLARE_ALIGNED(16, DCTELEM, block)[6][4][16];
123
    DECLARE_ALIGNED(16, DCTELEM, block_dc)[16];
124
    uint8_t intra4x4_pred_mode_mb[16];
125

  
126
    int chroma_pred_mode;    ///< 8x8c pred mode of the current macroblock
127
    int segment;             ///< segment of the current macroblock
128
    VP56mv mv_min;
129
    VP56mv mv_max;
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131
    int mbskip_enabled;
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    int sign_bias[4]; ///< one state [0, 1] per ref frame type
133
    int ref_count[3];
134

  
135
    /**
136
     * Base parameters for segmentation, i.e. per-macroblock parameters.
137
     * These must be kept unchanged even if segmentation is not used for
138
     * a frame, since the values persist between interframes.
139
     */
140
    struct {
141
        int enabled;
142
        int absolute_vals;
143
        int update_map;
144
        int8_t base_quant[4];
145
        int8_t filter_level[4];     ///< base loop filter level
146
    } segmentation;
147

  
148
    /**
149
     * Macroblocks can have one of 4 different quants in a frame when
150
     * segmentation is enabled.
151
     * If segmentation is disabled, only the first segment's values are used.
152
     */
153
    struct {
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        // [0] - DC qmul  [1] - AC qmul
155
        int16_t luma_qmul[2];
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        int16_t luma_dc_qmul[2];    ///< luma dc-only block quant
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        int16_t chroma_qmul[2];
158
    } qmat[4];
159

  
160
    struct {
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        int simple;
162
        int level;
163
        int sharpness;
164
    } filter;
165

  
166
    struct {
167
        int enabled;    ///< whether each mb can have a different strength based on mode/ref
168

  
169
        /**
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         * filter strength adjustment for the following macroblock modes:
171
         * [0-3] - i16x16 (always zero)
172
         * [4]   - i4x4
173
         * [5]   - zero mv
174
         * [6]   - inter modes except for zero or split mv
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         * [7]   - split mv
176
         *  i16x16 modes never have any adjustment
177
         */
178
        int8_t mode[VP8_MVMODE_SPLIT+1];
179

  
180
        /**
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         * filter strength adjustment for macroblocks that reference:
182
         * [0] - intra / VP56_FRAME_CURRENT
183
         * [1] - VP56_FRAME_PREVIOUS
184
         * [2] - VP56_FRAME_GOLDEN
185
         * [3] - altref / VP56_FRAME_GOLDEN2
186
         */
187
        int8_t ref[4];
188
    } lf_delta;
189

  
190
    /**
191
     * These are all of the updatable probabilities for binary decisions.
192
     * They are only implictly reset on keyframes, making it quite likely
193
     * for an interframe to desync if a prior frame's header was corrupt
194
     * or missing outright!
195
     */
196
    struct {
197
        uint8_t segmentid[3];
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        uint8_t mbskip;
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        uint8_t intra;
200
        uint8_t last;
201
        uint8_t golden;
202
        uint8_t pred16x16[4];
203
        uint8_t pred8x8c[3];
204
        /* Padded to allow overreads */
205
        uint8_t token[4][17][3][NUM_DCT_TOKENS-1];
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        uint8_t mvc[2][19];
207
    } prob[2];
208
} VP8Context;
209

  
210 35
static void vp8_decode_flush(AVCodecContext *avctx)
211 36
{
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    VP8Context *s = avctx->priv_data;
libavcodec/vp8.h
1
/**
2
 * VP8 compatible video decoder
3
 *
4
 * Copyright (C) 2010 David Conrad
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 * Copyright (C) 2010 Ronald S. Bultje
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 * Copyright (C) 2010 Jason Garrett-Glaser
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 *
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 * This file is part of FFmpeg.
9
 *
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 * FFmpeg is free software; you can redistribute it and/or
11
 * modify it under the terms of the GNU Lesser General Public
12
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
14
 *
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 * FFmpeg is distributed in the hope that it will be useful,
16
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18
 * Lesser General Public License for more details.
19
 *
20
 * You should have received a copy of the GNU Lesser General Public
21
 * License along with FFmpeg; if not, write to the Free Software
22
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
24

  
25
#ifndef AVCODEC_VP8_H
26
#define AVCODEC_VP8_H
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28
#include "vp56.h"
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#include "vp56data.h"
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#include "vp8dsp.h"
31
#include "h264pred.h"
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#define VP8_MAX_QUANT 127
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35
enum dct_token {
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    DCT_0,
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    DCT_1,
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    DCT_2,
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    DCT_3,
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    DCT_4,
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    DCT_CAT1,
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    DCT_CAT2,
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    DCT_CAT3,
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    DCT_CAT4,
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    DCT_CAT5,
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    DCT_CAT6,
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    DCT_EOB,
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    NUM_DCT_TOKENS
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};
51

  
52
// used to signal 4x4 intra pred in luma MBs
53
#define MODE_I4x4 4
54

  
55
enum inter_mvmode {
56
    VP8_MVMODE_ZERO = MODE_I4x4 + 1,
57
    VP8_MVMODE_MV,
58
    VP8_MVMODE_SPLIT
59
};
60

  
61
enum inter_splitmvmode {
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    VP8_SPLITMVMODE_16x8 = 0,    ///< 2 16x8 blocks (vertical)
63
    VP8_SPLITMVMODE_8x16,        ///< 2 8x16 blocks (horizontal)
64
    VP8_SPLITMVMODE_8x8,         ///< 2x2 blocks of 8x8px each
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    VP8_SPLITMVMODE_4x4,         ///< 4x4 blocks of 4x4px each
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    VP8_SPLITMVMODE_NONE,        ///< (only used in prediction) no split MVs
67
};
68

  
69
typedef struct {
70
    uint8_t filter_level;
71
    uint8_t inner_limit;
72
    uint8_t inner_filter;
73
} VP8FilterStrength;
74

  
75
typedef struct {
76
    uint8_t skip;
77
    // todo: make it possible to check for at least (i4x4 or split_mv)
78
    // in one op. are others needed?
79
    uint8_t mode;
80
    uint8_t ref_frame;
81
    uint8_t partitioning;
82
    VP56mv mv;
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    VP56mv bmv[16];
84
} VP8Macroblock;
85

  
86
typedef struct {
87
    AVCodecContext *avctx;
88
    DSPContext dsp;
89
    VP8DSPContext vp8dsp;
90
    H264PredContext hpc;
91
    vp8_mc_func put_pixels_tab[3][3][3];
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    AVFrame frames[4];
93
    AVFrame *framep[4];
94
    uint8_t *edge_emu_buffer;
95
    VP56RangeCoder c;   ///< header context, includes mb modes and motion vectors
96
    int profile;
97

  
98
    int mb_width;   /* number of horizontal MB */
99
    int mb_height;  /* number of vertical MB */
100
    int linesize;
101
    int uvlinesize;
102

  
103
    int keyframe;
104
    int invisible;
105
    int update_last;    ///< update VP56_FRAME_PREVIOUS with the current one
106
    int update_golden;  ///< VP56_FRAME_NONE if not updated, or which frame to copy if so
107
    int update_altref;
108
    int deblock_filter;
109

  
110
    /**
111
     * If this flag is not set, all the probability updates
112
     * are discarded after this frame is decoded.
113
     */
114
    int update_probabilities;
115

  
116
    /**
117
     * All coefficients are contained in separate arith coding contexts.
118
     * There can be 1, 2, 4, or 8 of these after the header context.
119
     */
120
    int num_coeff_partitions;
121
    VP56RangeCoder coeff_partition[8];
122

  
123
    VP8Macroblock *macroblocks;
124
    VP8Macroblock *macroblocks_base;
125
    VP8FilterStrength *filter_strength;
126

  
127
    uint8_t *intra4x4_pred_mode_top;
128
    uint8_t intra4x4_pred_mode_left[4];
129
    uint8_t *segmentation_map;
130

  
131
    /**
132
     * Cache of the top row needed for intra prediction
133
     * 16 for luma, 8 for each chroma plane
134
     */
135
    uint8_t (*top_border)[16+8+8];
136

  
137
    /**
138
     * For coeff decode, we need to know whether the above block had non-zero
139
     * coefficients. This means for each macroblock, we need data for 4 luma
140
     * blocks, 2 u blocks, 2 v blocks, and the luma dc block, for a total of 9
141
     * per macroblock. We keep the last row in top_nnz.
142
     */
143
    uint8_t (*top_nnz)[9];
144
    DECLARE_ALIGNED(8, uint8_t, left_nnz)[9];
145

  
146
    /**
147
     * This is the index plus one of the last non-zero coeff
148
     * for each of the blocks in the current macroblock.
149
     * So, 0 -> no coeffs
150
     *     1 -> dc-only (special transform)
151
     *     2+-> full transform
152
     */
153
    DECLARE_ALIGNED(16, uint8_t, non_zero_count_cache)[6][4];
154
    DECLARE_ALIGNED(16, DCTELEM, block)[6][4][16];
155
    DECLARE_ALIGNED(16, DCTELEM, block_dc)[16];
156
    uint8_t intra4x4_pred_mode_mb[16];
157

  
158
    int chroma_pred_mode;    ///< 8x8c pred mode of the current macroblock
159
    int segment;             ///< segment of the current macroblock
160
    VP56mv mv_min;
161
    VP56mv mv_max;
162

  
163
    int mbskip_enabled;
164
    int sign_bias[4]; ///< one state [0, 1] per ref frame type
165
    int ref_count[3];
166

  
167
    /**
168
     * Base parameters for segmentation, i.e. per-macroblock parameters.
169
     * These must be kept unchanged even if segmentation is not used for
170
     * a frame, since the values persist between interframes.
171
     */
172
    struct {
173
        int enabled;
174
        int absolute_vals;
175
        int update_map;
176
        int8_t base_quant[4];
177
        int8_t filter_level[4];     ///< base loop filter level
178
    } segmentation;
179

  
180
    /**
181
     * Macroblocks can have one of 4 different quants in a frame when
182
     * segmentation is enabled.
183
     * If segmentation is disabled, only the first segment's values are used.
184
     */
185
    struct {
186
        // [0] - DC qmul  [1] - AC qmul
187
        int16_t luma_qmul[2];
188
        int16_t luma_dc_qmul[2];    ///< luma dc-only block quant
189
        int16_t chroma_qmul[2];
190
    } qmat[4];
191

  
192
    struct {
193
        int simple;
194
        int level;
195
        int sharpness;
196
    } filter;
197

  
198
    struct {
199
        int enabled;    ///< whether each mb can have a different strength based on mode/ref
200

  
201
        /**
202
         * filter strength adjustment for the following macroblock modes:
203
         * [0-3] - i16x16 (always zero)
204
         * [4]   - i4x4
205
         * [5]   - zero mv
206
         * [6]   - inter modes except for zero or split mv
207
         * [7]   - split mv
208
         *  i16x16 modes never have any adjustment
209
         */
210
        int8_t mode[VP8_MVMODE_SPLIT+1];
211

  
212
        /**
213
         * filter strength adjustment for macroblocks that reference:
214
         * [0] - intra / VP56_FRAME_CURRENT
215
         * [1] - VP56_FRAME_PREVIOUS
216
         * [2] - VP56_FRAME_GOLDEN
217
         * [3] - altref / VP56_FRAME_GOLDEN2
218
         */
219
        int8_t ref[4];
220
    } lf_delta;
221

  
222
    /**
223
     * These are all of the updatable probabilities for binary decisions.
224
     * They are only implictly reset on keyframes, making it quite likely
225
     * for an interframe to desync if a prior frame's header was corrupt
226
     * or missing outright!
227
     */
228
    struct {
229
        uint8_t segmentid[3];
230
        uint8_t mbskip;
231
        uint8_t intra;
232
        uint8_t last;
233
        uint8_t golden;
234
        uint8_t pred16x16[4];
235
        uint8_t pred8x8c[3];
236
        /* Padded to allow overreads */
237
        uint8_t token[4][17][3][NUM_DCT_TOKENS-1];
238
        uint8_t mvc[2][19];
239
    } prob[2];
240
} VP8Context;
241

  
242
#endif
libavcodec/vp8data.h
21 21
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 22
 */
23 23

  
24
// TODO: move these #define and enum to a better header...
25

  
26
#define VP8_MAX_QUANT 127
27

  
28
enum dct_token {
29
    DCT_0,
30
    DCT_1,
31
    DCT_2,
32
    DCT_3,
33
    DCT_4,
34
    DCT_CAT1,
35
    DCT_CAT2,
36
    DCT_CAT3,
37
    DCT_CAT4,
38
    DCT_CAT5,
39
    DCT_CAT6,
40
    DCT_EOB,
41

  
42
    NUM_DCT_TOKENS
43
};
24
#ifndef AVCODEC_VP8DATA_H
25
#define AVCODEC_VP8DATA_H
44 26

  
27
#include "vp8.h"
45 28
#include "h264pred.h"
46 29

  
47
// used to signal 4x4 intra pred in luma MBs
48
#define MODE_I4x4 4
49

  
50
enum inter_mvmode {
51
    VP8_MVMODE_ZERO = MODE_I4x4 + 1,
52
    VP8_MVMODE_MV,
53
    VP8_MVMODE_SPLIT
54
};
55

  
56
enum inter_splitmvmode {
57
    VP8_SPLITMVMODE_16x8 = 0,    ///< 2 16x8 blocks (vertical)
58
    VP8_SPLITMVMODE_8x16,        ///< 2 8x16 blocks (horizontal)
59
    VP8_SPLITMVMODE_8x8,         ///< 2x2 blocks of 8x8px each
60
    VP8_SPLITMVMODE_4x4,         ///< 4x4 blocks of 4x4px each
61
    VP8_SPLITMVMODE_NONE,        ///< (only used in prediction) no split MVs
62
};
63

  
64 30
static const uint8_t vp8_pred4x4_mode[] =
65 31
{
66 32
    [DC_PRED8x8]    = DC_PRED,
......
718 684
      204, 170, 119, 235, 140, 230, 228,
719 685
      128, 130, 130,  74, 148, 180, 203, 236, 254, 254 }
720 686
};
687

  
688
#endif

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