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1 3b636f21 David Conrad
/**
2
 * VP8 compatible video decoder
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 *
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 * Copyright (C) 2010 David Conrad
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 * Copyright (C) 2010 Ronald S. Bultje
6 13a1304b Jason Garrett-Glaser
 * Copyright (C) 2010 Jason Garrett-Glaser
7 3b636f21 David Conrad
 *
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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
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 * 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.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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25
#include "avcodec.h"
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#include "vp56.h"
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#include "vp8data.h"
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#include "vp8dsp.h"
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#include "h264pred.h"
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#include "rectangle.h"
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typedef struct {
33 968570d6 Jason Garrett-Glaser
    uint8_t filter_level;
34
    uint8_t inner_limit;
35 c55e0d34 Jason Garrett-Glaser
    uint8_t inner_filter;
36 968570d6 Jason Garrett-Glaser
} VP8FilterStrength;
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typedef struct {
39 3b636f21 David Conrad
    uint8_t skip;
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    // todo: make it possible to check for at least (i4x4 or split_mv)
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    // in one op. are others needed?
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    uint8_t mode;
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    uint8_t ref_frame;
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    uint8_t partitioning;
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    VP56mv mv;
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    VP56mv bmv[16];
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} VP8Macroblock;
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typedef struct {
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    AVCodecContext *avctx;
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    DSPContext dsp;
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    VP8DSPContext vp8dsp;
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    H264PredContext hpc;
54 0ef1dbed David Conrad
    vp8_mc_func put_pixels_tab[3][3][3];
55 3b636f21 David Conrad
    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
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    int profile;
60
61
    int mb_width;   /* number of horizontal MB */
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    int mb_height;  /* number of vertical MB */
63
    int linesize;
64
    int uvlinesize;
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66
    int keyframe;
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    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
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    int update_altref;
71 9ac831c2 David Conrad
    int deblock_filter;
72 3b636f21 David Conrad
73
    /**
74
     * If this flag is not set, all the probability updates
75
     * are discarded after this frame is decoded.
76
     */
77
    int update_probabilities;
78
79
    /**
80
     * All coefficients are contained in separate arith coding contexts.
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     * There can be 1, 2, 4, or 8 of these after the header context.
82
     */
83
    int num_coeff_partitions;
84
    VP56RangeCoder coeff_partition[8];
85
86
    VP8Macroblock *macroblocks;
87
    VP8Macroblock *macroblocks_base;
88 968570d6 Jason Garrett-Glaser
    VP8FilterStrength *filter_strength;
89 3b636f21 David Conrad
    int mb_stride;
90
91 d2840fa4 Pascal Massimino
    uint8_t *intra4x4_pred_mode_top;
92
    uint8_t intra4x4_pred_mode_left[4];
93 c55e0d34 Jason Garrett-Glaser
    uint8_t *segmentation_map;
94 3b636f21 David Conrad
    int b4_stride;
95
96
    /**
97 9ac831c2 David Conrad
     * Cache of the top row needed for intra prediction
98
     * 16 for luma, 8 for each chroma plane
99
     */
100
    uint8_t (*top_border)[16+8+8];
101
102
    /**
103 3b636f21 David Conrad
     * For coeff decode, we need to know whether the above block had non-zero
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     * coefficients. This means for each macroblock, we need data for 4 luma
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     * blocks, 2 u blocks, 2 v blocks, and the luma dc block, for a total of 9
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     * per macroblock. We keep the last row in top_nnz.
107
     */
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    uint8_t (*top_nnz)[9];
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    DECLARE_ALIGNED(8, uint8_t, left_nnz)[9];
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    /**
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     * This is the index plus one of the last non-zero coeff
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     * for each of the blocks in the current macroblock.
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     * So, 0 -> no coeffs
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     *     1 -> dc-only (special transform)
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     *     2+-> full transform
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     */
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    DECLARE_ALIGNED(16, uint8_t, non_zero_count_cache)[6][4];
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    DECLARE_ALIGNED(16, DCTELEM, block)[6][4][16];
120 827d43bb Jason Garrett-Glaser
    DECLARE_ALIGNED(16, DCTELEM, block_dc)[16];
121 d1c58fce Jason Garrett-Glaser
    uint8_t intra4x4_pred_mode_mb[16];
122 3b636f21 David Conrad
123
    int chroma_pred_mode;    ///< 8x8c pred mode of the current macroblock
124 b9a7186b Jason Garrett-Glaser
    int segment;             ///< segment of the current macroblock
125 3b636f21 David Conrad
126
    int mbskip_enabled;
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    int sign_bias[4]; ///< one state [0, 1] per ref frame type
128 c4211046 Jason Garrett-Glaser
    int ref_count[3];
129 3b636f21 David Conrad
130
    /**
131
     * Base parameters for segmentation, i.e. per-macroblock parameters.
132
     * These must be kept unchanged even if segmentation is not used for
133
     * a frame, since the values persist between interframes.
134
     */
135
    struct {
136
        int enabled;
137
        int absolute_vals;
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        int update_map;
139
        int8_t base_quant[4];
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        int8_t filter_level[4];     ///< base loop filter level
141
    } segmentation;
142
143
    /**
144
     * Macroblocks can have one of 4 different quants in a frame when
145
     * segmentation is enabled.
146
     * If segmentation is disabled, only the first segment's values are used.
147
     */
148
    struct {
149
        // [0] - DC qmul  [1] - AC qmul
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        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];
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    } qmat[4];
154
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    struct {
156
        int simple;
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        int level;
158
        int sharpness;
159
    } filter;
160
161
    struct {
162
        int enabled;    ///< whether each mb can have a different strength based on mode/ref
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164
        /**
165
         * filter strength adjustment for the following macroblock modes:
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         * [0] - i4x4
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         * [1] - zero mv
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         * [2] - inter modes except for zero or split mv
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         * [3] - split mv
170
         *  i16x16 modes never have any adjustment
171
         */
172
        int8_t mode[4];
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174
        /**
175
         * filter strength adjustment for macroblocks that reference:
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         * [0] - intra / VP56_FRAME_CURRENT
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         * [1] - VP56_FRAME_PREVIOUS
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         * [2] - VP56_FRAME_GOLDEN
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         * [3] - altref / VP56_FRAME_GOLDEN2
180
         */
181
        int8_t ref[4];
182
    } lf_delta;
183
184
    /**
185
     * These are all of the updatable probabilities for binary decisions.
186
     * They are only implictly reset on keyframes, making it quite likely
187
     * for an interframe to desync if a prior frame's header was corrupt
188
     * or missing outright!
189
     */
190
    struct {
191
        uint8_t segmentid[3];
192 a8ab0ccc Pascal Massimino
        uint8_t mbskip;
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        uint8_t intra;
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        uint8_t last;
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        uint8_t golden;
196 3b636f21 David Conrad
        uint8_t pred16x16[4];
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        uint8_t pred8x8c[3];
198 370b622a Jason Garrett-Glaser
        /* Padded to allow overreads */
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        uint8_t token[4][17][3][NUM_DCT_TOKENS-1];
200 3b636f21 David Conrad
        uint8_t mvc[2][19];
201
    } prob[2];
202
} VP8Context;
203
204
static void vp8_decode_flush(AVCodecContext *avctx)
205
{
206
    VP8Context *s = avctx->priv_data;
207
    int i;
208
209
    for (i = 0; i < 4; i++)
210
        if (s->frames[i].data[0])
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            avctx->release_buffer(avctx, &s->frames[i]);
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    memset(s->framep, 0, sizeof(s->framep));
213
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    av_freep(&s->macroblocks_base);
215 fca05ea8 Jason Garrett-Glaser
    av_freep(&s->filter_strength);
216 d2840fa4 Pascal Massimino
    av_freep(&s->intra4x4_pred_mode_top);
217 3b636f21 David Conrad
    av_freep(&s->top_nnz);
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    av_freep(&s->edge_emu_buffer);
219 9ac831c2 David Conrad
    av_freep(&s->top_border);
220 c55e0d34 Jason Garrett-Glaser
    av_freep(&s->segmentation_map);
221 3b636f21 David Conrad
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    s->macroblocks        = NULL;
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}
224
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static int update_dimensions(VP8Context *s, int width, int height)
226
{
227
    if (avcodec_check_dimensions(s->avctx, width, height))
228
        return AVERROR_INVALIDDATA;
229
230
    vp8_decode_flush(s->avctx);
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232
    avcodec_set_dimensions(s->avctx, width, height);
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    s->mb_width  = (s->avctx->coded_width +15) / 16;
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    s->mb_height = (s->avctx->coded_height+15) / 16;
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237
    // we allocate a border around the top/left of intra4x4 modes
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    // this is 4 blocks for intra4x4 to keep 4-byte alignment for fill_rectangle
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    s->mb_stride = s->mb_width+1;
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    s->b4_stride = 4*s->mb_stride;
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242 c55e0d34 Jason Garrett-Glaser
    s->macroblocks_base        = av_mallocz((s->mb_stride+s->mb_height*2+2)*sizeof(*s->macroblocks));
243 968570d6 Jason Garrett-Glaser
    s->filter_strength         = av_mallocz(s->mb_stride*sizeof(*s->filter_strength));
244 d2840fa4 Pascal Massimino
    s->intra4x4_pred_mode_top  = av_mallocz(s->b4_stride*4);
245 3b636f21 David Conrad
    s->top_nnz                 = av_mallocz(s->mb_width*sizeof(*s->top_nnz));
246 9ac831c2 David Conrad
    s->top_border              = av_mallocz((s->mb_width+1)*sizeof(*s->top_border));
247 c55e0d34 Jason Garrett-Glaser
    s->segmentation_map        = av_mallocz(s->mb_stride*s->mb_height);
248 3b636f21 David Conrad
249 d2840fa4 Pascal Massimino
    if (!s->macroblocks_base || !s->filter_strength || !s->intra4x4_pred_mode_top ||
250 c55e0d34 Jason Garrett-Glaser
        !s->top_nnz || !s->top_border || !s->segmentation_map)
251 b6c420ce David Conrad
        return AVERROR(ENOMEM);
252
253 c55e0d34 Jason Garrett-Glaser
    s->macroblocks        = s->macroblocks_base + 1;
254 3b636f21 David Conrad
255
    return 0;
256
}
257
258
static void parse_segment_info(VP8Context *s)
259
{
260
    VP56RangeCoder *c = &s->c;
261
    int i;
262
263
    s->segmentation.update_map = vp8_rac_get(c);
264
265
    if (vp8_rac_get(c)) { // update segment feature data
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        s->segmentation.absolute_vals = vp8_rac_get(c);
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268
        for (i = 0; i < 4; i++)
269
            s->segmentation.base_quant[i]   = vp8_rac_get_sint(c, 7);
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271
        for (i = 0; i < 4; i++)
272
            s->segmentation.filter_level[i] = vp8_rac_get_sint(c, 6);
273
    }
274
    if (s->segmentation.update_map)
275
        for (i = 0; i < 3; i++)
276
            s->prob->segmentid[i] = vp8_rac_get(c) ? vp8_rac_get_uint(c, 8) : 255;
277
}
278
279
static void update_lf_deltas(VP8Context *s)
280
{
281
    VP56RangeCoder *c = &s->c;
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    int i;
283
284
    for (i = 0; i < 4; i++)
285
        s->lf_delta.ref[i]  = vp8_rac_get_sint(c, 6);
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287
    for (i = 0; i < 4; i++)
288
        s->lf_delta.mode[i] = vp8_rac_get_sint(c, 6);
289
}
290
291
static int setup_partitions(VP8Context *s, const uint8_t *buf, int buf_size)
292
{
293
    const uint8_t *sizes = buf;
294
    int i;
295
296
    s->num_coeff_partitions = 1 << vp8_rac_get_uint(&s->c, 2);
297
298
    buf      += 3*(s->num_coeff_partitions-1);
299
    buf_size -= 3*(s->num_coeff_partitions-1);
300
    if (buf_size < 0)
301
        return -1;
302
303
    for (i = 0; i < s->num_coeff_partitions-1; i++) {
304 06d50ca8 Jason Garrett-Glaser
        int size = AV_RL24(sizes + 3*i);
305 3b636f21 David Conrad
        if (buf_size - size < 0)
306
            return -1;
307
308
        vp56_init_range_decoder(&s->coeff_partition[i], buf, size);
309
        buf      += size;
310
        buf_size -= size;
311
    }
312
    vp56_init_range_decoder(&s->coeff_partition[i], buf, buf_size);
313
314
    return 0;
315
}
316
317
static void get_quants(VP8Context *s)
318
{
319
    VP56RangeCoder *c = &s->c;
320
    int i, base_qi;
321
322
    int yac_qi     = vp8_rac_get_uint(c, 7);
323
    int ydc_delta  = vp8_rac_get_sint(c, 4);
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    int y2dc_delta = vp8_rac_get_sint(c, 4);
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    int y2ac_delta = vp8_rac_get_sint(c, 4);
326
    int uvdc_delta = vp8_rac_get_sint(c, 4);
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    int uvac_delta = vp8_rac_get_sint(c, 4);
328
329
    for (i = 0; i < 4; i++) {
330
        if (s->segmentation.enabled) {
331
            base_qi = s->segmentation.base_quant[i];
332
            if (!s->segmentation.absolute_vals)
333
                base_qi += yac_qi;
334
        } else
335
            base_qi = yac_qi;
336
337
        s->qmat[i].luma_qmul[0]    =       vp8_dc_qlookup[av_clip(base_qi + ydc_delta , 0, 127)];
338
        s->qmat[i].luma_qmul[1]    =       vp8_ac_qlookup[av_clip(base_qi             , 0, 127)];
339
        s->qmat[i].luma_dc_qmul[0] =   2 * vp8_dc_qlookup[av_clip(base_qi + y2dc_delta, 0, 127)];
340 a8ab0ccc Pascal Massimino
        s->qmat[i].luma_dc_qmul[1] = 155 * vp8_ac_qlookup[av_clip(base_qi + y2ac_delta, 0, 127)] / 100;
341
        s->qmat[i].chroma_qmul[0]  =       vp8_dc_qlookup[av_clip(base_qi + uvdc_delta, 0, 127)];
342 3b636f21 David Conrad
        s->qmat[i].chroma_qmul[1]  =       vp8_ac_qlookup[av_clip(base_qi + uvac_delta, 0, 127)];
343 a8ab0ccc Pascal Massimino
344
        s->qmat[i].luma_dc_qmul[1] = FFMAX(s->qmat[i].luma_dc_qmul[1], 8);
345
        s->qmat[i].chroma_qmul[0]  = FFMIN(s->qmat[i].chroma_qmul[0], 132);
346 3b636f21 David Conrad
    }
347
}
348
349
/**
350
 * Determine which buffers golden and altref should be updated with after this frame.
351
 * The spec isn't clear here, so I'm going by my understanding of what libvpx does
352
 *
353
 * Intra frames update all 3 references
354
 * Inter frames update VP56_FRAME_PREVIOUS if the update_last flag is set
355
 * If the update (golden|altref) flag is set, it's updated with the current frame
356
 *      if update_last is set, and VP56_FRAME_PREVIOUS otherwise.
357
 * If the flag is not set, the number read means:
358
 *      0: no update
359
 *      1: VP56_FRAME_PREVIOUS
360
 *      2: update golden with altref, or update altref with golden
361
 */
362
static VP56Frame ref_to_update(VP8Context *s, int update, VP56Frame ref)
363
{
364
    VP56RangeCoder *c = &s->c;
365
366
    if (update)
367
        return VP56_FRAME_CURRENT;
368
369
    switch (vp8_rac_get_uint(c, 2)) {
370
    case 1:
371
        return VP56_FRAME_PREVIOUS;
372
    case 2:
373
        return (ref == VP56_FRAME_GOLDEN) ? VP56_FRAME_GOLDEN2 : VP56_FRAME_GOLDEN;
374
    }
375
    return VP56_FRAME_NONE;
376
}
377
378
static void update_refs(VP8Context *s)
379
{
380
    VP56RangeCoder *c = &s->c;
381
382
    int update_golden = vp8_rac_get(c);
383
    int update_altref = vp8_rac_get(c);
384
385
    s->update_golden = ref_to_update(s, update_golden, VP56_FRAME_GOLDEN);
386
    s->update_altref = ref_to_update(s, update_altref, VP56_FRAME_GOLDEN2);
387
}
388
389
static int decode_frame_header(VP8Context *s, const uint8_t *buf, int buf_size)
390
{
391
    VP56RangeCoder *c = &s->c;
392 370b622a Jason Garrett-Glaser
    int header_size, hscale, vscale, i, j, k, l, m, ret;
393 3b636f21 David Conrad
    int width  = s->avctx->width;
394
    int height = s->avctx->height;
395
396
    s->keyframe  = !(buf[0] & 1);
397
    s->profile   =  (buf[0]>>1) & 7;
398
    s->invisible = !(buf[0] & 0x10);
399 06d50ca8 Jason Garrett-Glaser
    header_size  = AV_RL24(buf) >> 5;
400 3b636f21 David Conrad
    buf      += 3;
401
    buf_size -= 3;
402
403 0ef1dbed David Conrad
    if (s->profile > 3)
404
        av_log(s->avctx, AV_LOG_WARNING, "Unknown profile %d\n", s->profile);
405
406
    if (!s->profile)
407
        memcpy(s->put_pixels_tab, s->vp8dsp.put_vp8_epel_pixels_tab, sizeof(s->put_pixels_tab));
408
    else    // profile 1-3 use bilinear, 4+ aren't defined so whatever
409
        memcpy(s->put_pixels_tab, s->vp8dsp.put_vp8_bilinear_pixels_tab, sizeof(s->put_pixels_tab));
410 3b636f21 David Conrad
411
    if (header_size > buf_size - 7*s->keyframe) {
412
        av_log(s->avctx, AV_LOG_ERROR, "Header size larger than data provided\n");
413
        return AVERROR_INVALIDDATA;
414
    }
415
416
    if (s->keyframe) {
417 06d50ca8 Jason Garrett-Glaser
        if (AV_RL24(buf) != 0x2a019d) {
418
            av_log(s->avctx, AV_LOG_ERROR, "Invalid start code 0x%x\n", AV_RL24(buf));
419 3b636f21 David Conrad
            return AVERROR_INVALIDDATA;
420
        }
421
        width  = AV_RL16(buf+3) & 0x3fff;
422
        height = AV_RL16(buf+5) & 0x3fff;
423
        hscale = buf[4] >> 6;
424
        vscale = buf[6] >> 6;
425
        buf      += 7;
426
        buf_size -= 7;
427
428 92a54426 Måns Rullgård
        if (hscale || vscale)
429
            av_log_missing_feature(s->avctx, "Upscaling", 1);
430
431 3b636f21 David Conrad
        s->update_golden = s->update_altref = VP56_FRAME_CURRENT;
432 370b622a Jason Garrett-Glaser
        for (i = 0; i < 4; i++)
433
            for (j = 0; j < 16; j++)
434
                memcpy(s->prob->token[i][j], vp8_token_default_probs[i][vp8_coeff_band[j]],
435
                       sizeof(s->prob->token[i][j]));
436 3b636f21 David Conrad
        memcpy(s->prob->pred16x16, vp8_pred16x16_prob_inter, sizeof(s->prob->pred16x16));
437
        memcpy(s->prob->pred8x8c , vp8_pred8x8c_prob_inter , sizeof(s->prob->pred8x8c));
438
        memcpy(s->prob->mvc      , vp8_mv_default_prob     , sizeof(s->prob->mvc));
439
        memset(&s->segmentation, 0, sizeof(s->segmentation));
440
    }
441
442
    if (!s->macroblocks_base || /* first frame */
443
        width != s->avctx->width || height != s->avctx->height) {
444
        if ((ret = update_dimensions(s, width, height) < 0))
445
            return ret;
446
    }
447
448
    vp56_init_range_decoder(c, buf, header_size);
449
    buf      += header_size;
450
    buf_size -= header_size;
451
452
    if (s->keyframe) {
453
        if (vp8_rac_get(c))
454
            av_log(s->avctx, AV_LOG_WARNING, "Unspecified colorspace\n");
455
        vp8_rac_get(c); // whether we can skip clamping in dsp functions
456
    }
457
458
    if ((s->segmentation.enabled = vp8_rac_get(c)))
459
        parse_segment_info(s);
460
    else
461
        s->segmentation.update_map = 0; // FIXME: move this to some init function?
462
463
    s->filter.simple    = vp8_rac_get(c);
464
    s->filter.level     = vp8_rac_get_uint(c, 6);
465
    s->filter.sharpness = vp8_rac_get_uint(c, 3);
466
467
    if ((s->lf_delta.enabled = vp8_rac_get(c)))
468
        if (vp8_rac_get(c))
469
            update_lf_deltas(s);
470
471
    if (setup_partitions(s, buf, buf_size)) {
472
        av_log(s->avctx, AV_LOG_ERROR, "Invalid partitions\n");
473
        return AVERROR_INVALIDDATA;
474
    }
475
476
    get_quants(s);
477
478
    if (!s->keyframe) {
479
        update_refs(s);
480
        s->sign_bias[VP56_FRAME_GOLDEN]               = vp8_rac_get(c);
481
        s->sign_bias[VP56_FRAME_GOLDEN2 /* altref */] = vp8_rac_get(c);
482
    }
483
484
    // if we aren't saving this frame's probabilities for future frames,
485
    // make a copy of the current probabilities
486
    if (!(s->update_probabilities = vp8_rac_get(c)))
487
        s->prob[1] = s->prob[0];
488
489
    s->update_last = s->keyframe || vp8_rac_get(c);
490
491
    for (i = 0; i < 4; i++)
492
        for (j = 0; j < 8; j++)
493
            for (k = 0; k < 3; k++)
494
                for (l = 0; l < NUM_DCT_TOKENS-1; l++)
495 370b622a Jason Garrett-Glaser
                    if (vp56_rac_get_prob_branchy(c, vp8_token_update_probs[i][j][k][l])) {
496
                        int prob = vp8_rac_get_uint(c, 8);
497 b0d58795 Jason Garrett-Glaser
                        for (m = 0; vp8_coeff_band_indexes[j][m] >= 0; m++)
498
                            s->prob->token[i][vp8_coeff_band_indexes[j][m]][k][l] = prob;
499 370b622a Jason Garrett-Glaser
                    }
500 3b636f21 David Conrad
501
    if ((s->mbskip_enabled = vp8_rac_get(c)))
502 a8ab0ccc Pascal Massimino
        s->prob->mbskip = vp8_rac_get_uint(c, 8);
503 3b636f21 David Conrad
504
    if (!s->keyframe) {
505 a8ab0ccc Pascal Massimino
        s->prob->intra  = vp8_rac_get_uint(c, 8);
506
        s->prob->last   = vp8_rac_get_uint(c, 8);
507
        s->prob->golden = vp8_rac_get_uint(c, 8);
508 3b636f21 David Conrad
509
        if (vp8_rac_get(c))
510
            for (i = 0; i < 4; i++)
511
                s->prob->pred16x16[i] = vp8_rac_get_uint(c, 8);
512
        if (vp8_rac_get(c))
513
            for (i = 0; i < 3; i++)
514
                s->prob->pred8x8c[i]  = vp8_rac_get_uint(c, 8);
515
516
        // 17.2 MV probability update
517
        for (i = 0; i < 2; i++)
518
            for (j = 0; j < 19; j++)
519 7697cdcf David Conrad
                if (vp56_rac_get_prob_branchy(c, vp8_mv_update_prob[i][j]))
520 3b636f21 David Conrad
                    s->prob->mvc[i][j] = vp8_rac_get_nn(c);
521
    }
522
523
    return 0;
524
}
525
526 414ac27d Jason Garrett-Glaser
static av_always_inline
527
void clamp_mv(VP8Context *s, VP56mv *dst, const VP56mv *src, int mb_x, int mb_y)
528 3b636f21 David Conrad
{
529
#define MARGIN (16 << 2)
530
    dst->x = av_clip(src->x, -((mb_x << 6) + MARGIN),
531
                     ((s->mb_width  - 1 - mb_x) << 6) + MARGIN);
532
    dst->y = av_clip(src->y, -((mb_y << 6) + MARGIN),
533
                     ((s->mb_height - 1 - mb_y) << 6) + MARGIN);
534
}
535
536 414ac27d Jason Garrett-Glaser
static av_always_inline
537
void find_near_mvs(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y,
538
                   VP56mv near[2], VP56mv *best, uint8_t cnt[4])
539 3b636f21 David Conrad
{
540 c55e0d34 Jason Garrett-Glaser
    VP8Macroblock *mb_edge[3] = { mb + 2 /* top */,
541
                                  mb - 1 /* left */,
542
                                  mb + 1 /* top-left */ };
543 3b636f21 David Conrad
    enum { EDGE_TOP, EDGE_LEFT, EDGE_TOPLEFT };
544
    VP56mv near_mv[4]  = {{ 0 }};
545
    enum { CNT_ZERO, CNT_NEAREST, CNT_NEAR, CNT_SPLITMV };
546 702e8d33 Jason Garrett-Glaser
    int idx = CNT_ZERO;
547 3b636f21 David Conrad
    int best_idx = CNT_ZERO;
548 702e8d33 Jason Garrett-Glaser
    int cur_sign_bias = s->sign_bias[mb->ref_frame];
549
    int *sign_bias = s->sign_bias;
550 3b636f21 David Conrad
551
    /* Process MB on top, left and top-left */
552 702e8d33 Jason Garrett-Glaser
    #define MV_EDGE_CHECK(n)\
553
    {\
554
        VP8Macroblock *edge = mb_edge[n];\
555
        int edge_ref = edge->ref_frame;\
556
        if (edge_ref != VP56_FRAME_CURRENT) {\
557
            uint32_t mv = AV_RN32A(&edge->mv);\
558
            if (mv) {\
559
                if (cur_sign_bias != sign_bias[edge_ref]) {\
560
                    /* SWAR negate of the values in mv. */\
561 0087aa47 Jason Garrett-Glaser
                    mv = ~mv;\
562
                    mv = ((mv&0x7fff7fff) + 0x00010001) ^ (mv&0x80008000);\
563 702e8d33 Jason Garrett-Glaser
                }\
564
                if (!n || mv != AV_RN32A(&near_mv[idx]))\
565
                    AV_WN32A(&near_mv[++idx], mv);\
566
                cnt[idx]      += 1 + (n != 2);\
567
            } else\
568
                cnt[CNT_ZERO] += 1 + (n != 2);\
569
        }\
570 3b636f21 David Conrad
    }
571 702e8d33 Jason Garrett-Glaser
    MV_EDGE_CHECK(0)
572
    MV_EDGE_CHECK(1)
573
    MV_EDGE_CHECK(2)
574 3b636f21 David Conrad
575 702e8d33 Jason Garrett-Glaser
    /* If we have three distinct MVs, merge first and last if they're the same */
576
    if (cnt[CNT_SPLITMV] && AV_RN32A(&near_mv[1+EDGE_TOP]) == AV_RN32A(&near_mv[1+EDGE_TOPLEFT]))
577 3b636f21 David Conrad
        cnt[CNT_NEAREST] += 1;
578
579
    cnt[CNT_SPLITMV] = ((mb_edge[EDGE_LEFT]->mode   == VP8_MVMODE_SPLIT) +
580
                        (mb_edge[EDGE_TOP]->mode    == VP8_MVMODE_SPLIT)) * 2 +
581
                       (mb_edge[EDGE_TOPLEFT]->mode == VP8_MVMODE_SPLIT);
582
583
    /* Swap near and nearest if necessary */
584
    if (cnt[CNT_NEAR] > cnt[CNT_NEAREST]) {
585 702e8d33 Jason Garrett-Glaser
        FFSWAP(uint8_t,     cnt[CNT_NEAREST],     cnt[CNT_NEAR]);
586
        FFSWAP( VP56mv, near_mv[CNT_NEAREST], near_mv[CNT_NEAR]);
587 3b636f21 David Conrad
    }
588
589
    /* Choose the best mv out of 0,0 and the nearest mv */
590
    if (cnt[CNT_NEAREST] >= cnt[CNT_ZERO])
591
        best_idx = CNT_NEAREST;
592
593 9fddd14a Jason Garrett-Glaser
    mb->mv  = near_mv[best_idx];
594 3b636f21 David Conrad
    near[0] = near_mv[CNT_NEAREST];
595
    near[1] = near_mv[CNT_NEAR];
596
}
597
598
/**
599
 * Motion vector coding, 17.1.
600
 */
601
static int read_mv_component(VP56RangeCoder *c, const uint8_t *p)
602
{
603 ca18a478 David Conrad
    int bit, x = 0;
604 3b636f21 David Conrad
605 7697cdcf David Conrad
    if (vp56_rac_get_prob_branchy(c, p[0])) {
606 3b636f21 David Conrad
        int i;
607
608
        for (i = 0; i < 3; i++)
609
            x += vp56_rac_get_prob(c, p[9 + i]) << i;
610
        for (i = 9; i > 3; i--)
611
            x += vp56_rac_get_prob(c, p[9 + i]) << i;
612
        if (!(x & 0xFFF0) || vp56_rac_get_prob(c, p[12]))
613
            x += 8;
614 ca18a478 David Conrad
    } else {
615
        // small_mvtree
616
        const uint8_t *ps = p+2;
617
        bit = vp56_rac_get_prob(c, *ps);
618
        ps += 1 + 3*bit;
619
        x  += 4*bit;
620
        bit = vp56_rac_get_prob(c, *ps);
621
        ps += 1 + bit;
622
        x  += 2*bit;
623
        x  += vp56_rac_get_prob(c, *ps);
624
    }
625 3b636f21 David Conrad
626
    return (x && vp56_rac_get_prob(c, p[1])) ? -x : x;
627
}
628
629 414ac27d Jason Garrett-Glaser
static av_always_inline
630
const uint8_t *get_submv_prob(uint32_t left, uint32_t top)
631 3b636f21 David Conrad
{
632 7bf254c4 Jason Garrett-Glaser
    if (left == top)
633
        return vp8_submv_prob[4-!!left];
634
    if (!top)
635 3b636f21 David Conrad
        return vp8_submv_prob[2];
636 7bf254c4 Jason Garrett-Glaser
    return vp8_submv_prob[1-!!left];
637 3b636f21 David Conrad
}
638
639
/**
640
 * Split motion vector prediction, 16.4.
641 7ed06b2b Ronald S. Bultje
 * @returns the number of motion vectors parsed (2, 4 or 16)
642 3b636f21 David Conrad
 */
643 414ac27d Jason Garrett-Glaser
static av_always_inline
644
int decode_splitmvs(VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb)
645 3b636f21 David Conrad
{
646 0908f1b9 Jason Garrett-Glaser
    int part_idx;
647
    int n, num;
648 c55e0d34 Jason Garrett-Glaser
    VP8Macroblock *top_mb  = &mb[2];
649 7bf254c4 Jason Garrett-Glaser
    VP8Macroblock *left_mb = &mb[-1];
650
    const uint8_t *mbsplits_left = vp8_mbsplits[left_mb->partitioning],
651
                  *mbsplits_top = vp8_mbsplits[top_mb->partitioning],
652 0908f1b9 Jason Garrett-Glaser
                  *mbsplits_cur, *firstidx;
653 c55e0d34 Jason Garrett-Glaser
    VP56mv *top_mv  = top_mb->bmv;
654
    VP56mv *left_mv = left_mb->bmv;
655
    VP56mv *cur_mv  = mb->bmv;
656 3b636f21 David Conrad
657 0908f1b9 Jason Garrett-Glaser
    if (vp56_rac_get_prob_branchy(c, vp8_mbsplit_prob[0])) {
658
        if (vp56_rac_get_prob_branchy(c, vp8_mbsplit_prob[1])) {
659
            part_idx = VP8_SPLITMVMODE_16x8 + vp56_rac_get_prob(c, vp8_mbsplit_prob[2]);
660
        } else {
661
            part_idx = VP8_SPLITMVMODE_8x8;
662
        }
663
    } else {
664
        part_idx = VP8_SPLITMVMODE_4x4;
665
    }
666
667
    num = vp8_mbsplit_count[part_idx];
668
    mbsplits_cur = vp8_mbsplits[part_idx],
669
    firstidx = vp8_mbfirstidx[part_idx];
670
    mb->partitioning = part_idx;
671
672 3b636f21 David Conrad
    for (n = 0; n < num; n++) {
673 7ed06b2b Ronald S. Bultje
        int k = firstidx[n];
674 7bf254c4 Jason Garrett-Glaser
        uint32_t left, above;
675 7ed06b2b Ronald S. Bultje
        const uint8_t *submv_prob;
676
677 7bf254c4 Jason Garrett-Glaser
        if (!(k & 3))
678
            left = AV_RN32A(&left_mv[mbsplits_left[k + 3]]);
679
        else
680
            left  = AV_RN32A(&cur_mv[mbsplits_cur[k - 1]]);
681
        if (k <= 3)
682
            above = AV_RN32A(&top_mv[mbsplits_top[k + 12]]);
683
        else
684
            above = AV_RN32A(&cur_mv[mbsplits_cur[k - 4]]);
685 7ed06b2b Ronald S. Bultje
686
        submv_prob = get_submv_prob(left, above);
687 3b636f21 David Conrad
688 c5dec7f1 Jason Garrett-Glaser
        if (vp56_rac_get_prob_branchy(c, submv_prob[0])) {
689
            if (vp56_rac_get_prob_branchy(c, submv_prob[1])) {
690
                if (vp56_rac_get_prob_branchy(c, submv_prob[2])) {
691
                    mb->bmv[n].y = mb->mv.y + read_mv_component(c, s->prob->mvc[0]);
692
                    mb->bmv[n].x = mb->mv.x + read_mv_component(c, s->prob->mvc[1]);
693
                } else {
694
                    AV_ZERO32(&mb->bmv[n]);
695
                }
696
            } else {
697
                AV_WN32A(&mb->bmv[n], above);
698
            }
699
        } else {
700 7bf254c4 Jason Garrett-Glaser
            AV_WN32A(&mb->bmv[n], left);
701 3b636f21 David Conrad
        }
702
    }
703 7ed06b2b Ronald S. Bultje
704
    return num;
705 3b636f21 David Conrad
}
706
707 414ac27d Jason Garrett-Glaser
static av_always_inline
708 d2840fa4 Pascal Massimino
void decode_intra4x4_modes(VP8Context *s, VP56RangeCoder *c,
709
                           int mb_x, int keyframe)
710 3b636f21 David Conrad
{
711 d2840fa4 Pascal Massimino
    uint8_t *intra4x4 = s->intra4x4_pred_mode_mb;
712 d1c58fce Jason Garrett-Glaser
    if (keyframe) {
713 d2840fa4 Pascal Massimino
        int x, y;
714
        uint8_t* const top = s->intra4x4_pred_mode_top + 4 * mb_x;
715
        uint8_t* const left = s->intra4x4_pred_mode_left;
716 d1c58fce Jason Garrett-Glaser
        for (y = 0; y < 4; y++) {
717
            for (x = 0; x < 4; x++) {
718 d2840fa4 Pascal Massimino
                const uint8_t *ctx;
719
                ctx = vp8_pred4x4_prob_intra[top[x]][left[y]];
720
                *intra4x4 = vp8_rac_get_tree(c, vp8_pred4x4_tree, ctx);
721
                left[y] = top[x] = *intra4x4;
722
                intra4x4++;
723 3b636f21 David Conrad
            }
724
        }
725 d1c58fce Jason Garrett-Glaser
    } else {
726 d2840fa4 Pascal Massimino
        int i;
727 d1c58fce Jason Garrett-Glaser
        for (i = 0; i < 16; i++)
728
            intra4x4[i] = vp8_rac_get_tree(c, vp8_pred4x4_tree, vp8_pred4x4_prob_inter);
729 3b636f21 David Conrad
    }
730
}
731
732 414ac27d Jason Garrett-Glaser
static av_always_inline
733 d2840fa4 Pascal Massimino
void decode_mb_mode(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_t *segment)
734 3b636f21 David Conrad
{
735
    VP56RangeCoder *c = &s->c;
736
737
    if (s->segmentation.update_map)
738 c55e0d34 Jason Garrett-Glaser
        *segment = vp8_rac_get_tree(c, vp8_segmentid_tree, s->prob->segmentid);
739 b9a7186b Jason Garrett-Glaser
    s->segment = *segment;
740 3b636f21 David Conrad
741 a8ab0ccc Pascal Massimino
    mb->skip = s->mbskip_enabled ? vp56_rac_get_prob(c, s->prob->mbskip) : 0;
742 3b636f21 David Conrad
743
    if (s->keyframe) {
744
        mb->mode = vp8_rac_get_tree(c, vp8_pred16x16_tree_intra, vp8_pred16x16_prob_intra);
745
746
        if (mb->mode == MODE_I4x4) {
747 d2840fa4 Pascal Massimino
            decode_intra4x4_modes(s, c, mb_x, 1);
748
        } else {
749
            const uint32_t modes = vp8_pred4x4_mode[mb->mode] * 0x01010101u;
750
            AV_WN32A(s->intra4x4_pred_mode_top + 4 * mb_x, modes);
751
            AV_WN32A(s->intra4x4_pred_mode_left, modes);
752
        }
753 3b636f21 David Conrad
754
        s->chroma_pred_mode = vp8_rac_get_tree(c, vp8_pred8x8c_tree, vp8_pred8x8c_prob_intra);
755
        mb->ref_frame = VP56_FRAME_CURRENT;
756 a8ab0ccc Pascal Massimino
    } else if (vp56_rac_get_prob_branchy(c, s->prob->intra)) {
757 3b636f21 David Conrad
        VP56mv near[2], best;
758 702e8d33 Jason Garrett-Glaser
        uint8_t cnt[4] = { 0 };
759 3b636f21 David Conrad
760
        // inter MB, 16.2
761 a8ab0ccc Pascal Massimino
        if (vp56_rac_get_prob_branchy(c, s->prob->last))
762
            mb->ref_frame = vp56_rac_get_prob(c, s->prob->golden) ?
763 3b636f21 David Conrad
                VP56_FRAME_GOLDEN2 /* altref */ : VP56_FRAME_GOLDEN;
764
        else
765
            mb->ref_frame = VP56_FRAME_PREVIOUS;
766 c4211046 Jason Garrett-Glaser
        s->ref_count[mb->ref_frame-1]++;
767 3b636f21 David Conrad
768
        // motion vectors, 16.3
769
        find_near_mvs(s, mb, mb_x, mb_y, near, &best, cnt);
770 23117d69 Jason Garrett-Glaser
        if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[0]][0])) {
771
            if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[1]][1])) {
772
                if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[2]][2])) {
773
                    if (vp56_rac_get_prob_branchy(c, vp8_mode_contexts[cnt[3]][3])) {
774
                        mb->mode = VP8_MVMODE_SPLIT;
775
                        clamp_mv(s, &mb->mv, &mb->mv, mb_x, mb_y);
776
                        mb->mv = mb->bmv[decode_splitmvs(s, c, mb) - 1];
777
                    } else {
778
                        mb->mode = VP8_MVMODE_NEW;
779
                        clamp_mv(s, &mb->mv, &mb->mv, mb_x, mb_y);
780
                        mb->mv.y += + read_mv_component(c, s->prob->mvc[0]);
781
                        mb->mv.x += + read_mv_component(c, s->prob->mvc[1]);
782
                    }
783
                } else {
784
                    mb->mode = VP8_MVMODE_NEAR;
785
                    clamp_mv(s, &mb->mv, &near[1], mb_x, mb_y);
786
                }
787
            } else {
788
                mb->mode = VP8_MVMODE_NEAREST;
789
                clamp_mv(s, &mb->mv, &near[0], mb_x, mb_y);
790
            }
791
        } else {
792
            mb->mode = VP8_MVMODE_ZERO;
793 14767f35 Jason Garrett-Glaser
            AV_ZERO32(&mb->mv);
794 3b636f21 David Conrad
        }
795
        if (mb->mode != VP8_MVMODE_SPLIT) {
796 7ed06b2b Ronald S. Bultje
            mb->partitioning = VP8_SPLITMVMODE_NONE;
797
            mb->bmv[0] = mb->mv;
798 3b636f21 David Conrad
        }
799
    } else {
800
        // intra MB, 16.1
801
        mb->mode = vp8_rac_get_tree(c, vp8_pred16x16_tree_inter, s->prob->pred16x16);
802
803 158e062c Jason Garrett-Glaser
        if (mb->mode == MODE_I4x4)
804 d2840fa4 Pascal Massimino
            decode_intra4x4_modes(s, c, mb_x, 0);
805 3b636f21 David Conrad
806
        s->chroma_pred_mode = vp8_rac_get_tree(c, vp8_pred8x8c_tree, s->prob->pred8x8c);
807
        mb->ref_frame = VP56_FRAME_CURRENT;
808 b946111f Jason Garrett-Glaser
        mb->partitioning = VP8_SPLITMVMODE_NONE;
809 14767f35 Jason Garrett-Glaser
        AV_ZERO32(&mb->bmv[0]);
810 3b636f21 David Conrad
    }
811
}
812
813
/**
814 e394953e Ronald S. Bultje
 * @param c arithmetic bitstream reader context
815
 * @param block destination for block coefficients
816
 * @param probs probabilities to use when reading trees from the bitstream
817 3b636f21 David Conrad
 * @param i initial coeff index, 0 unless a separate DC block is coded
818
 * @param zero_nhood the initial prediction context for number of surrounding
819
 *                   all-zero blocks (only left/top, so 0-2)
820 3fa76268 Diego Biurrun
 * @param qmul array holding the dc/ac dequant factor at position 0/1
821 3b636f21 David Conrad
 * @return 0 if no coeffs were decoded
822
 *         otherwise, the index of the last coeff decoded plus one
823
 */
824
static int decode_block_coeffs(VP56RangeCoder *c, DCTELEM block[16],
825
                               uint8_t probs[8][3][NUM_DCT_TOKENS-1],
826
                               int i, int zero_nhood, int16_t qmul[2])
827
{
828 370b622a Jason Garrett-Glaser
    uint8_t *token_prob = probs[i][zero_nhood];
829 fe1b5d97 David Conrad
    int nonzero = 0;
830
    int coeff;
831 3b636f21 David Conrad
832 fe1b5d97 David Conrad
    do {
833
        if (!vp56_rac_get_prob_branchy(c, token_prob[0]))   // DCT_EOB
834
            return nonzero;
835 3b636f21 David Conrad
836 fe1b5d97 David Conrad
skip_eob:
837
        if (!vp56_rac_get_prob_branchy(c, token_prob[1])) { // DCT_0
838 c22b4468 Pascal Massimino
            if (++i == 16)
839
                return nonzero; // invalid input; blocks should end with EOB
840 370b622a Jason Garrett-Glaser
            token_prob = probs[i][0];
841 c22b4468 Pascal Massimino
            goto skip_eob;
842 fe1b5d97 David Conrad
        }
843
844
        if (!vp56_rac_get_prob_branchy(c, token_prob[2])) { // DCT_1
845
            coeff = 1;
846 370b622a Jason Garrett-Glaser
            token_prob = probs[i+1][1];
847 fe1b5d97 David Conrad
        } else {
848
            if (!vp56_rac_get_prob_branchy(c, token_prob[3])) { // DCT 2,3,4
849 476be414 Jason Garrett-Glaser
                coeff = vp56_rac_get_prob_branchy(c, token_prob[4]);
850 fe1b5d97 David Conrad
                if (coeff)
851
                    coeff += vp56_rac_get_prob(c, token_prob[5]);
852
                coeff += 2;
853
            } else {
854
                // DCT_CAT*
855
                if (!vp56_rac_get_prob_branchy(c, token_prob[6])) {
856
                    if (!vp56_rac_get_prob_branchy(c, token_prob[7])) { // DCT_CAT1
857
                        coeff  = 5 + vp56_rac_get_prob(c, vp8_dct_cat1_prob[0]);
858
                    } else {                                    // DCT_CAT2
859
                        coeff  = 7;
860
                        coeff += vp56_rac_get_prob(c, vp8_dct_cat2_prob[0]) << 1;
861
                        coeff += vp56_rac_get_prob(c, vp8_dct_cat2_prob[1]);
862
                    }
863
                } else {    // DCT_CAT3 and up
864
                    int a = vp56_rac_get_prob(c, token_prob[8]);
865
                    int b = vp56_rac_get_prob(c, token_prob[9+a]);
866
                    int cat = (a<<1) + b;
867
                    coeff  = 3 + (8<<cat);
868
                    coeff += vp8_rac_get_coeff(c, vp8_dct_cat_prob[cat]);
869
                }
870
            }
871 370b622a Jason Garrett-Glaser
            token_prob = probs[i+1][2];
872 fe1b5d97 David Conrad
        }
873
874 3b636f21 David Conrad
        // todo: full [16] qmat? load into register?
875 fe1b5d97 David Conrad
        block[zigzag_scan[i]] = (vp8_rac_get(c) ? -coeff : coeff) * qmul[!!i];
876
        nonzero = ++i;
877
    } while (i < 16);
878
879 3b636f21 David Conrad
    return nonzero;
880
}
881
882 414ac27d Jason Garrett-Glaser
static av_always_inline
883
void decode_mb_coeffs(VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb,
884
                      uint8_t t_nnz[9], uint8_t l_nnz[9])
885 3b636f21 David Conrad
{
886
    int i, x, y, luma_start = 0, luma_ctx = 3;
887
    int nnz_pred, nnz, nnz_total = 0;
888 b9a7186b Jason Garrett-Glaser
    int segment = s->segment;
889 f311208c Jason Garrett-Glaser
    int block_dc = 0;
890 3b636f21 David Conrad
891
    if (mb->mode != MODE_I4x4 && mb->mode != VP8_MVMODE_SPLIT) {
892
        nnz_pred = t_nnz[8] + l_nnz[8];
893
894
        // decode DC values and do hadamard
895 827d43bb Jason Garrett-Glaser
        nnz = decode_block_coeffs(c, s->block_dc, s->prob->token[1], 0, nnz_pred,
896 3b636f21 David Conrad
                                  s->qmat[segment].luma_dc_qmul);
897
        l_nnz[8] = t_nnz[8] = !!nnz;
898 f311208c Jason Garrett-Glaser
        if (nnz) {
899
            nnz_total += nnz;
900
            block_dc = 1;
901
            if (nnz == 1)
902
                s->vp8dsp.vp8_luma_dc_wht_dc(s->block, s->block_dc);
903
            else
904
                s->vp8dsp.vp8_luma_dc_wht(s->block, s->block_dc);
905
        }
906 3b636f21 David Conrad
        luma_start = 1;
907
        luma_ctx = 0;
908
    }
909
910
    // luma blocks
911
    for (y = 0; y < 4; y++)
912
        for (x = 0; x < 4; x++) {
913
            nnz_pred = l_nnz[y] + t_nnz[x];
914
            nnz = decode_block_coeffs(c, s->block[y][x], s->prob->token[luma_ctx], luma_start,
915
                                      nnz_pred, s->qmat[segment].luma_qmul);
916 f311208c Jason Garrett-Glaser
            // nnz+block_dc may be one more than the actual last index, but we don't care
917
            s->non_zero_count_cache[y][x] = nnz + block_dc;
918 3b636f21 David Conrad
            t_nnz[x] = l_nnz[y] = !!nnz;
919
            nnz_total += nnz;
920
        }
921
922
    // chroma blocks
923
    // TODO: what to do about dimensions? 2nd dim for luma is x,
924
    // but for chroma it's (y<<1)|x
925
    for (i = 4; i < 6; i++)
926
        for (y = 0; y < 2; y++)
927
            for (x = 0; x < 2; x++) {
928
                nnz_pred = l_nnz[i+2*y] + t_nnz[i+2*x];
929
                nnz = decode_block_coeffs(c, s->block[i][(y<<1)+x], s->prob->token[2], 0,
930
                                          nnz_pred, s->qmat[segment].chroma_qmul);
931
                s->non_zero_count_cache[i][(y<<1)+x] = nnz;
932
                t_nnz[i+2*x] = l_nnz[i+2*y] = !!nnz;
933
                nnz_total += nnz;
934
            }
935
936
    // if there were no coded coeffs despite the macroblock not being marked skip,
937
    // we MUST not do the inner loop filter and should not do IDCT
938
    // Since skip isn't used for bitstream prediction, just manually set it.
939
    if (!nnz_total)
940
        mb->skip = 1;
941
}
942
943 9ac831c2 David Conrad
static av_always_inline
944
void backup_mb_border(uint8_t *top_border, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr,
945
                      int linesize, int uvlinesize, int simple)
946
{
947
    AV_COPY128(top_border, src_y + 15*linesize);
948
    if (!simple) {
949
        AV_COPY64(top_border+16, src_cb + 7*uvlinesize);
950
        AV_COPY64(top_border+24, src_cr + 7*uvlinesize);
951
    }
952
}
953
954
static av_always_inline
955
void xchg_mb_border(uint8_t *top_border, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr,
956
                    int linesize, int uvlinesize, int mb_x, int mb_y, int mb_width,
957
                    int simple, int xchg)
958
{
959
    uint8_t *top_border_m1 = top_border-32;     // for TL prediction
960
    src_y  -=   linesize;
961
    src_cb -= uvlinesize;
962
    src_cr -= uvlinesize;
963
964 096971e8 Måns Rullgård
#define XCHG(a,b,xchg) do {                     \
965
        if (xchg) AV_SWAP64(b,a);               \
966
        else      AV_COPY64(b,a);               \
967
    } while (0)
968 9ac831c2 David Conrad
969
    XCHG(top_border_m1+8, src_y-8, xchg);
970
    XCHG(top_border,      src_y,   xchg);
971
    XCHG(top_border+8,    src_y+8, 1);
972 070ce7ef Måns Rullgård
    if (mb_x < mb_width-1)
973 9ac831c2 David Conrad
        XCHG(top_border+32, src_y+16, 1);
974 070ce7ef Måns Rullgård
975 9ac831c2 David Conrad
    // only copy chroma for normal loop filter
976
    // or to initialize the top row to 127
977
    if (!simple || !mb_y) {
978
        XCHG(top_border_m1+16, src_cb-8, xchg);
979
        XCHG(top_border_m1+24, src_cr-8, xchg);
980
        XCHG(top_border+16,    src_cb, 1);
981
        XCHG(top_border+24,    src_cr, 1);
982
    }
983
}
984
985 414ac27d Jason Garrett-Glaser
static av_always_inline
986
int check_intra_pred_mode(int mode, int mb_x, int mb_y)
987 3b636f21 David Conrad
{
988
    if (mode == DC_PRED8x8) {
989 a71abb71 Jason Garrett-Glaser
        if (!mb_x) {
990
            mode = mb_y ? TOP_DC_PRED8x8 : DC_128_PRED8x8;
991
        } else if (!mb_y) {
992 09959ec4 Jason Garrett-Glaser
            mode = LEFT_DC_PRED8x8;
993 a71abb71 Jason Garrett-Glaser
        }
994 3b636f21 David Conrad
    }
995
    return mode;
996
}
997
998 414ac27d Jason Garrett-Glaser
static av_always_inline
999
void intra_predict(VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb,
1000 d2840fa4 Pascal Massimino
                   int mb_x, int mb_y)
1001 3b636f21 David Conrad
{
1002
    int x, y, mode, nnz, tr;
1003
1004 9ac831c2 David Conrad
    // for the first row, we need to run xchg_mb_border to init the top edge to 127
1005
    // otherwise, skip it if we aren't going to deblock
1006
    if (s->deblock_filter || !mb_y)
1007
        xchg_mb_border(s->top_border[mb_x+1], dst[0], dst[1], dst[2],
1008
                       s->linesize, s->uvlinesize, mb_x, mb_y, s->mb_width,
1009
                       s->filter.simple, 1);
1010
1011 3b636f21 David Conrad
    if (mb->mode < MODE_I4x4) {
1012
        mode = check_intra_pred_mode(mb->mode, mb_x, mb_y);
1013
        s->hpc.pred16x16[mode](dst[0], s->linesize);
1014
    } else {
1015
        uint8_t *ptr = dst[0];
1016 d2840fa4 Pascal Massimino
        uint8_t *intra4x4 = s->intra4x4_pred_mode_mb;
1017 3b636f21 David Conrad
1018
        // all blocks on the right edge of the macroblock use bottom edge
1019
        // the top macroblock for their topright edge
1020
        uint8_t *tr_right = ptr - s->linesize + 16;
1021
1022
        // if we're on the right edge of the frame, said edge is extended
1023
        // from the top macroblock
1024
        if (mb_x == s->mb_width-1) {
1025
            tr = tr_right[-1]*0x01010101;
1026
            tr_right = (uint8_t *)&tr;
1027
        }
1028
1029 b74f70d6 Jason Garrett-Glaser
        if (mb->skip)
1030
            AV_ZERO128(s->non_zero_count_cache);
1031
1032 3b636f21 David Conrad
        for (y = 0; y < 4; y++) {
1033
            uint8_t *topright = ptr + 4 - s->linesize;
1034
            for (x = 0; x < 4; x++) {
1035
                if (x == 3)
1036
                    topright = tr_right;
1037
1038 d1c58fce Jason Garrett-Glaser
                s->hpc.pred4x4[intra4x4[x]](ptr+4*x, topright, s->linesize);
1039 3b636f21 David Conrad
1040
                nnz = s->non_zero_count_cache[y][x];
1041
                if (nnz) {
1042
                    if (nnz == 1)
1043
                        s->vp8dsp.vp8_idct_dc_add(ptr+4*x, s->block[y][x], s->linesize);
1044
                    else
1045
                        s->vp8dsp.vp8_idct_add(ptr+4*x, s->block[y][x], s->linesize);
1046
                }
1047
                topright += 4;
1048
            }
1049
1050
            ptr   += 4*s->linesize;
1051 d2840fa4 Pascal Massimino
            intra4x4 += 4;
1052 3b636f21 David Conrad
        }
1053
    }
1054
1055
    mode = check_intra_pred_mode(s->chroma_pred_mode, mb_x, mb_y);
1056
    s->hpc.pred8x8[mode](dst[1], s->uvlinesize);
1057
    s->hpc.pred8x8[mode](dst[2], s->uvlinesize);
1058 9ac831c2 David Conrad
1059
    if (s->deblock_filter || !mb_y)
1060
        xchg_mb_border(s->top_border[mb_x+1], dst[0], dst[1], dst[2],
1061
                       s->linesize, s->uvlinesize, mb_x, mb_y, s->mb_width,
1062
                       s->filter.simple, 0);
1063 3b636f21 David Conrad
}
1064
1065
/**
1066
 * Generic MC function.
1067
 *
1068
 * @param s VP8 decoding context
1069
 * @param luma 1 for luma (Y) planes, 0 for chroma (Cb/Cr) planes
1070
 * @param dst target buffer for block data at block position
1071
 * @param src reference picture buffer at origin (0, 0)
1072
 * @param mv motion vector (relative to block position) to get pixel data from
1073
 * @param x_off horizontal position of block from origin (0, 0)
1074
 * @param y_off vertical position of block from origin (0, 0)
1075
 * @param block_w width of block (16, 8 or 4)
1076
 * @param block_h height of block (always same as block_w)
1077
 * @param width width of src/dst plane data
1078
 * @param height height of src/dst plane data
1079
 * @param linesize size of a single line of plane data, including padding
1080 e394953e Ronald S. Bultje
 * @param mc_func motion compensation function pointers (bilinear or sixtap MC)
1081 3b636f21 David Conrad
 */
1082 414ac27d Jason Garrett-Glaser
static av_always_inline
1083
void vp8_mc(VP8Context *s, int luma,
1084
            uint8_t *dst, uint8_t *src, const VP56mv *mv,
1085
            int x_off, int y_off, int block_w, int block_h,
1086
            int width, int height, int linesize,
1087
            vp8_mc_func mc_func[3][3])
1088 3b636f21 David Conrad
{
1089 c0498b30 Jason Garrett-Glaser
    if (AV_RN32A(mv)) {
1090
        static const uint8_t idx[8] = { 0, 1, 2, 1, 2, 1, 2, 1 };
1091
        int mx = (mv->x << luma)&7, mx_idx = idx[mx];
1092
        int my = (mv->y << luma)&7, my_idx = idx[my];
1093
1094
        x_off += mv->x >> (3 - luma);
1095
        y_off += mv->y >> (3 - luma);
1096
1097
        // edge emulation
1098
        src += y_off * linesize + x_off;
1099
        if (x_off < 2 || x_off >= width  - block_w - 3 ||
1100
            y_off < 2 || y_off >= height - block_h - 3) {
1101
            ff_emulated_edge_mc(s->edge_emu_buffer, src - 2 * linesize - 2, linesize,
1102
                                block_w + 5, block_h + 5,
1103
                                x_off - 2, y_off - 2, width, height);
1104
            src = s->edge_emu_buffer + 2 + linesize * 2;
1105
        }
1106
        mc_func[my_idx][mx_idx](dst, linesize, src, linesize, block_h, mx, my);
1107
    } else
1108
        mc_func[0][0](dst, linesize, src + y_off * linesize + x_off, linesize, block_h, 0, 0);
1109 3b636f21 David Conrad
}
1110
1111 414ac27d Jason Garrett-Glaser
static av_always_inline
1112
void vp8_mc_part(VP8Context *s, uint8_t *dst[3],
1113
                 AVFrame *ref_frame, int x_off, int y_off,
1114
                 int bx_off, int by_off,
1115
                 int block_w, int block_h,
1116
                 int width, int height, VP56mv *mv)
1117 7c4dcf81 Ronald S. Bultje
{
1118
    VP56mv uvmv = *mv;
1119
1120
    /* Y */
1121
    vp8_mc(s, 1, dst[0] + by_off * s->linesize + bx_off,
1122
           ref_frame->data[0], mv, x_off + bx_off, y_off + by_off,
1123
           block_w, block_h, width, height, s->linesize,
1124
           s->put_pixels_tab[block_w == 8]);
1125
1126
    /* U/V */
1127
    if (s->profile == 3) {
1128
        uvmv.x &= ~7;
1129
        uvmv.y &= ~7;
1130
    }
1131
    x_off   >>= 1; y_off   >>= 1;
1132
    bx_off  >>= 1; by_off  >>= 1;
1133
    width   >>= 1; height  >>= 1;
1134
    block_w >>= 1; block_h >>= 1;
1135
    vp8_mc(s, 0, dst[1] + by_off * s->uvlinesize + bx_off,
1136
           ref_frame->data[1], &uvmv, x_off + bx_off, y_off + by_off,
1137
           block_w, block_h, width, height, s->uvlinesize,
1138
           s->put_pixels_tab[1 + (block_w == 4)]);
1139
    vp8_mc(s, 0, dst[2] + by_off * s->uvlinesize + bx_off,
1140
           ref_frame->data[2], &uvmv, x_off + bx_off, y_off + by_off,
1141
           block_w, block_h, width, height, s->uvlinesize,
1142
           s->put_pixels_tab[1 + (block_w == 4)]);
1143
}
1144
1145 d864dee8 Jason Garrett-Glaser
/* Fetch pixels for estimated mv 4 macroblocks ahead.
1146
 * Optimized for 64-byte cache lines.  Inspired by ffh264 prefetch_motion. */
1147 414ac27d Jason Garrett-Glaser
static av_always_inline void prefetch_motion(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, int mb_xy, int ref)
1148 d864dee8 Jason Garrett-Glaser
{
1149 ef38842f Jason Garrett-Glaser
    /* Don't prefetch refs that haven't been used very often this frame. */
1150
    if (s->ref_count[ref-1] > (mb_xy >> 5)) {
1151 c4211046 Jason Garrett-Glaser
        int x_off = mb_x << 4, y_off = mb_y << 4;
1152
        int mx = mb->mv.x + x_off + 8;
1153
        int my = mb->mv.y + y_off;
1154
        uint8_t **src= s->framep[ref]->data;
1155
        int off= mx + (my + (mb_x&3)*4)*s->linesize + 64;
1156
        s->dsp.prefetch(src[0]+off, s->linesize, 4);
1157
        off= (mx>>1) + ((my>>1) + (mb_x&7))*s->uvlinesize + 64;
1158
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
1159
    }
1160 d864dee8 Jason Garrett-Glaser
}
1161
1162 3b636f21 David Conrad
/**
1163
 * Apply motion vectors to prediction buffer, chapter 18.
1164
 */
1165 414ac27d Jason Garrett-Glaser
static av_always_inline
1166
void inter_predict(VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb,
1167
                   int mb_x, int mb_y)
1168 3b636f21 David Conrad
{
1169
    int x_off = mb_x << 4, y_off = mb_y << 4;
1170
    int width = 16*s->mb_width, height = 16*s->mb_height;
1171 d292c345 Jason Garrett-Glaser
    AVFrame *ref = s->framep[mb->ref_frame];
1172
    VP56mv *bmv = mb->bmv;
1173 3b636f21 David Conrad
1174
    if (mb->mode < VP8_MVMODE_SPLIT) {
1175 d292c345 Jason Garrett-Glaser
        vp8_mc_part(s, dst, ref, x_off, y_off,
1176 7c4dcf81 Ronald S. Bultje
                    0, 0, 16, 16, width, height, &mb->mv);
1177
    } else switch (mb->partitioning) {
1178
    case VP8_SPLITMVMODE_4x4: {
1179 3b636f21 David Conrad
        int x, y;
1180 7c4dcf81 Ronald S. Bultje
        VP56mv uvmv;
1181 3b636f21 David Conrad
1182
        /* Y */
1183
        for (y = 0; y < 4; y++) {
1184
            for (x = 0; x < 4; x++) {
1185
                vp8_mc(s, 1, dst[0] + 4*y*s->linesize + x*4,
1186 d292c345 Jason Garrett-Glaser
                       ref->data[0], &bmv[4*y + x],
1187 3b636f21 David Conrad
                       4*x + x_off, 4*y + y_off, 4, 4,
1188
                       width, height, s->linesize,
1189 0ef1dbed David Conrad
                       s->put_pixels_tab[2]);
1190 3b636f21 David Conrad
            }
1191
        }
1192
1193
        /* U/V */
1194
        x_off >>= 1; y_off >>= 1; width >>= 1; height >>= 1;
1195
        for (y = 0; y < 2; y++) {
1196
            for (x = 0; x < 2; x++) {
1197
                uvmv.x = mb->bmv[ 2*y    * 4 + 2*x  ].x +
1198
                         mb->bmv[ 2*y    * 4 + 2*x+1].x +
1199
                         mb->bmv[(2*y+1) * 4 + 2*x  ].x +
1200
                         mb->bmv[(2*y+1) * 4 + 2*x+1].x;
1201
                uvmv.y = mb->bmv[ 2*y    * 4 + 2*x  ].y +
1202
                         mb->bmv[ 2*y    * 4 + 2*x+1].y +
1203
                         mb->bmv[(2*y+1) * 4 + 2*x  ].y +
1204
                         mb->bmv[(2*y+1) * 4 + 2*x+1].y;
1205 8f910a56 Stefan Gehrer
                uvmv.x = (uvmv.x + 2 + (uvmv.x >> (INT_BIT-1))) >> 2;
1206
                uvmv.y = (uvmv.y + 2 + (uvmv.y >> (INT_BIT-1))) >> 2;
1207 3b636f21 David Conrad
                if (s->profile == 3) {
1208
                    uvmv.x &= ~7;
1209
                    uvmv.y &= ~7;
1210
                }
1211
                vp8_mc(s, 0, dst[1] + 4*y*s->uvlinesize + x*4,
1212 d292c345 Jason Garrett-Glaser
                       ref->data[1], &uvmv,
1213 3b636f21 David Conrad
                       4*x + x_off, 4*y + y_off, 4, 4,
1214
                       width, height, s->uvlinesize,
1215 0ef1dbed David Conrad
                       s->put_pixels_tab[2]);
1216 3b636f21 David Conrad
                vp8_mc(s, 0, dst[2] + 4*y*s->uvlinesize + x*4,
1217 d292c345 Jason Garrett-Glaser
                       ref->data[2], &uvmv,
1218 3b636f21 David Conrad
                       4*x + x_off, 4*y + y_off, 4, 4,
1219
                       width, height, s->uvlinesize,
1220 0ef1dbed David Conrad
                       s->put_pixels_tab[2]);
1221 3b636f21 David Conrad
            }
1222
        }
1223 7c4dcf81 Ronald S. Bultje
        break;
1224
    }
1225
    case VP8_SPLITMVMODE_16x8:
1226 d292c345 Jason Garrett-Glaser
        vp8_mc_part(s, dst, ref, x_off, y_off,
1227
                    0, 0, 16, 8, width, height, &bmv[0]);
1228
        vp8_mc_part(s, dst, ref, x_off, y_off,
1229
                    0, 8, 16, 8, width, height, &bmv[1]);
1230 7c4dcf81 Ronald S. Bultje
        break;
1231
    case VP8_SPLITMVMODE_8x16:
1232 d292c345 Jason Garrett-Glaser
        vp8_mc_part(s, dst, ref, x_off, y_off,
1233
                    0, 0, 8, 16, width, height, &bmv[0]);
1234
        vp8_mc_part(s, dst, ref, x_off, y_off,
1235
                    8, 0, 8, 16, width, height, &bmv[1]);
1236 7c4dcf81 Ronald S. Bultje
        break;
1237
    case VP8_SPLITMVMODE_8x8:
1238 d292c345 Jason Garrett-Glaser
        vp8_mc_part(s, dst, ref, x_off, y_off,
1239
                    0, 0, 8, 8, width, height, &bmv[0]);
1240
        vp8_mc_part(s, dst, ref, x_off, y_off,
1241
                    8, 0, 8, 8, width, height, &bmv[1]);
1242
        vp8_mc_part(s, dst, ref, x_off, y_off,
1243
                    0, 8, 8, 8, width, height, &bmv[2]);
1244
        vp8_mc_part(s, dst, ref, x_off, y_off,
1245
                    8, 8, 8, 8, width, height, &bmv[3]);
1246 7c4dcf81 Ronald S. Bultje
        break;
1247 3b636f21 David Conrad
    }
1248
}
1249
1250 414ac27d Jason Garrett-Glaser
static av_always_inline void idct_mb(VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb)
1251 3b636f21 David Conrad
{
1252 3df56f41 Jason Garrett-Glaser
    int x, y, ch;
1253 3b636f21 David Conrad
1254 8a467b2d Jason Garrett-Glaser
    if (mb->mode != MODE_I4x4) {
1255
        uint8_t *y_dst = dst[0];
1256 3b636f21 David Conrad
        for (y = 0; y < 4; y++) {
1257 3df56f41 Jason Garrett-Glaser
            uint32_t nnz4 = AV_RN32A(s->non_zero_count_cache[y]);
1258
            if (nnz4) {
1259
                if (nnz4&~0x01010101) {
1260 8a467b2d Jason Garrett-Glaser
                    for (x = 0; x < 4; x++) {
1261 3df56f41 Jason Garrett-Glaser
                        int nnz = s->non_zero_count_cache[y][x];
1262 8a467b2d Jason Garrett-Glaser
                        if (nnz) {
1263
                            if (nnz == 1)
1264
                                s->vp8dsp.vp8_idct_dc_add(y_dst+4*x, s->block[y][x], s->linesize);
1265
                            else
1266
                                s->vp8dsp.vp8_idct_add(y_dst+4*x, s->block[y][x], s->linesize);
1267
                        }
1268
                    }
1269
                } else {
1270 3ae079a3 Jason Garrett-Glaser
                    s->vp8dsp.vp8_idct_dc_add4y(y_dst, s->block[y], s->linesize);
1271 3b636f21 David Conrad
                }
1272
            }
1273
            y_dst += 4*s->linesize;
1274
        }
1275 8a467b2d Jason Garrett-Glaser
    }
1276 3b636f21 David Conrad
1277 8a467b2d Jason Garrett-Glaser
    for (ch = 0; ch < 2; ch++) {
1278 3ae079a3 Jason Garrett-Glaser
        uint32_t nnz4 = AV_RN32A(s->non_zero_count_cache[4+ch]);
1279
        if (nnz4) {
1280 8a467b2d Jason Garrett-Glaser
            uint8_t *ch_dst = dst[1+ch];
1281 3ae079a3 Jason Garrett-Glaser
            if (nnz4&~0x01010101) {
1282
                for (y = 0; y < 2; y++) {
1283
                    for (x = 0; x < 2; x++) {
1284
                        int nnz = s->non_zero_count_cache[4+ch][(y<<1)+x];
1285
                        if (nnz) {
1286
                            if (nnz == 1)
1287
                                s->vp8dsp.vp8_idct_dc_add(ch_dst+4*x, s->block[4+ch][(y<<1)+x], s->uvlinesize);
1288
                            else
1289
                                s->vp8dsp.vp8_idct_add(ch_dst+4*x, s->block[4+ch][(y<<1)+x], s->uvlinesize);
1290
                        }
1291 8a467b2d Jason Garrett-Glaser
                    }
1292 3ae079a3 Jason Garrett-Glaser
                    ch_dst += 4*s->uvlinesize;
1293 8a467b2d Jason Garrett-Glaser
                }
1294 3ae079a3 Jason Garrett-Glaser
            } else {
1295
                s->vp8dsp.vp8_idct_dc_add4uv(ch_dst, s->block[4+ch], s->uvlinesize);
1296 3b636f21 David Conrad
            }
1297
        }
1298
    }
1299
}
1300
1301 414ac27d Jason Garrett-Glaser
static av_always_inline void filter_level_for_mb(VP8Context *s, VP8Macroblock *mb, VP8FilterStrength *f )
1302 3b636f21 David Conrad
{
1303
    int interior_limit, filter_level;
1304
1305
    if (s->segmentation.enabled) {
1306 b9a7186b Jason Garrett-Glaser
        filter_level = s->segmentation.filter_level[s->segment];
1307 3b636f21 David Conrad
        if (!s->segmentation.absolute_vals)
1308
            filter_level += s->filter.level;
1309
    } else
1310
        filter_level = s->filter.level;
1311
1312
    if (s->lf_delta.enabled) {
1313
        filter_level += s->lf_delta.ref[mb->ref_frame];
1314
1315
        if (mb->ref_frame == VP56_FRAME_CURRENT) {
1316
            if (mb->mode == MODE_I4x4)
1317
                filter_level += s->lf_delta.mode[0];
1318
        } else {
1319
            if (mb->mode == VP8_MVMODE_ZERO)
1320
                filter_level += s->lf_delta.mode[1];
1321
            else if (mb->mode == VP8_MVMODE_SPLIT)
1322
                filter_level += s->lf_delta.mode[3];
1323
            else
1324
                filter_level += s->lf_delta.mode[2];
1325
        }
1326
    }
1327
    filter_level = av_clip(filter_level, 0, 63);
1328
1329
    interior_limit = filter_level;
1330
    if (s->filter.sharpness) {
1331
        interior_limit >>= s->filter.sharpness > 4 ? 2 : 1;
1332
        interior_limit = FFMIN(interior_limit, 9 - s->filter.sharpness);
1333
    }
1334
    interior_limit = FFMAX(interior_limit, 1);
1335
1336 968570d6 Jason Garrett-Glaser
    f->filter_level = filter_level;
1337
    f->inner_limit = interior_limit;
1338 c55e0d34 Jason Garrett-Glaser
    f->inner_filter = !mb->skip || mb->mode == MODE_I4x4 || mb->mode == VP8_MVMODE_SPLIT;
1339 3b636f21 David Conrad
}
1340
1341 414ac27d Jason Garrett-Glaser
static av_always_inline void filter_mb(VP8Context *s, uint8_t *dst[3], VP8FilterStrength *f, int mb_x, int mb_y)
1342 3b636f21 David Conrad
{
1343 968570d6 Jason Garrett-Glaser
    int mbedge_lim, bedge_lim, hev_thresh;
1344
    int filter_level = f->filter_level;
1345
    int inner_limit = f->inner_limit;
1346 c55e0d34 Jason Garrett-Glaser
    int inner_filter = f->inner_filter;
1347 145d3186 Jason Garrett-Glaser
    int linesize = s->linesize;
1348
    int uvlinesize = s->uvlinesize;
1349 3b636f21 David Conrad
1350
    if (!filter_level)
1351
        return;
1352
1353 5245c04d David Conrad
    mbedge_lim = 2*(filter_level+2) + inner_limit;
1354
     bedge_lim = 2* filter_level    + inner_limit;
1355 968570d6 Jason Garrett-Glaser
    hev_thresh = filter_level >= 15;
1356
1357
    if (s->keyframe) {
1358
        if (filter_level >= 40)
1359
            hev_thresh = 2;
1360
    } else {
1361
        if (filter_level >= 40)
1362
            hev_thresh = 3;
1363
        else if (filter_level >= 20)
1364
            hev_thresh = 2;
1365
    }
1366 5245c04d David Conrad
1367 3b636f21 David Conrad
    if (mb_x) {
1368 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_h_loop_filter16y(dst[0],     linesize,
1369 3facfc99 Ronald S. Bultje
                                       mbedge_lim, inner_limit, hev_thresh);
1370 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_h_loop_filter8uv(dst[1],     dst[2],      uvlinesize,
1371 3facfc99 Ronald S. Bultje
                                       mbedge_lim, inner_limit, hev_thresh);
1372 3b636f21 David Conrad
    }
1373
1374 c55e0d34 Jason Garrett-Glaser
    if (inner_filter) {
1375 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0]+ 4, linesize, bedge_lim,
1376
                                             inner_limit, hev_thresh);
1377
        s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0]+ 8, linesize, bedge_lim,
1378
                                             inner_limit, hev_thresh);
1379
        s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0]+12, linesize, bedge_lim,
1380
                                             inner_limit, hev_thresh);
1381
        s->vp8dsp.vp8_h_loop_filter8uv_inner(dst[1] + 4, dst[2] + 4,
1382
                                             uvlinesize,  bedge_lim,
1383
                                             inner_limit, hev_thresh);
1384 3b636f21 David Conrad
    }
1385
1386
    if (mb_y) {
1387 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_v_loop_filter16y(dst[0],     linesize,
1388 3facfc99 Ronald S. Bultje
                                       mbedge_lim, inner_limit, hev_thresh);
1389 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_v_loop_filter8uv(dst[1],     dst[2],      uvlinesize,
1390 3facfc99 Ronald S. Bultje
                                       mbedge_lim, inner_limit, hev_thresh);
1391 3b636f21 David Conrad
    }
1392
1393 c55e0d34 Jason Garrett-Glaser
    if (inner_filter) {
1394 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0]+ 4*linesize,
1395
                                             linesize,    bedge_lim,
1396
                                             inner_limit, hev_thresh);
1397
        s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0]+ 8*linesize,
1398
                                             linesize,    bedge_lim,
1399
                                             inner_limit, hev_thresh);
1400
        s->vp8dsp.vp8_v_loop_filter16y_inner(dst[0]+12*linesize,
1401
                                             linesize,    bedge_lim,
1402
                                             inner_limit, hev_thresh);
1403
        s->vp8dsp.vp8_v_loop_filter8uv_inner(dst[1] + 4 * uvlinesize,
1404
                                             dst[2] + 4 * uvlinesize,
1405
                                             uvlinesize,  bedge_lim,
1406 3facfc99 Ronald S. Bultje
                                             inner_limit, hev_thresh);
1407 3b636f21 David Conrad
    }
1408
}
1409
1410 414ac27d Jason Garrett-Glaser
static av_always_inline void filter_mb_simple(VP8Context *s, uint8_t *dst, VP8FilterStrength *f, int mb_x, int mb_y)
1411 3b636f21 David Conrad
{
1412 968570d6 Jason Garrett-Glaser
    int mbedge_lim, bedge_lim;
1413
    int filter_level = f->filter_level;
1414
    int inner_limit = f->inner_limit;
1415 c55e0d34 Jason Garrett-Glaser
    int inner_filter = f->inner_filter;
1416 145d3186 Jason Garrett-Glaser
    int linesize = s->linesize;
1417 3b636f21 David Conrad
1418
    if (!filter_level)
1419
        return;
1420
1421
    mbedge_lim = 2*(filter_level+2) + inner_limit;
1422
     bedge_lim = 2* filter_level    + inner_limit;
1423
1424
    if (mb_x)
1425 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_h_loop_filter_simple(dst, linesize, mbedge_lim);
1426 c55e0d34 Jason Garrett-Glaser
    if (inner_filter) {
1427 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_h_loop_filter_simple(dst+ 4, linesize, bedge_lim);
1428
        s->vp8dsp.vp8_h_loop_filter_simple(dst+ 8, linesize, bedge_lim);
1429
        s->vp8dsp.vp8_h_loop_filter_simple(dst+12, linesize, bedge_lim);
1430 3b636f21 David Conrad
    }
1431
1432
    if (mb_y)
1433 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_v_loop_filter_simple(dst, linesize, mbedge_lim);
1434 c55e0d34 Jason Garrett-Glaser
    if (inner_filter) {
1435 145d3186 Jason Garrett-Glaser
        s->vp8dsp.vp8_v_loop_filter_simple(dst+ 4*linesize, linesize, bedge_lim);
1436
        s->vp8dsp.vp8_v_loop_filter_simple(dst+ 8*linesize, linesize, bedge_lim);
1437
        s->vp8dsp.vp8_v_loop_filter_simple(dst+12*linesize, linesize, bedge_lim);
1438 3b636f21 David Conrad
    }
1439
}
1440
1441
static void filter_mb_row(VP8Context *s, int mb_y)
1442
{
1443 968570d6 Jason Garrett-Glaser
    VP8FilterStrength *f = s->filter_strength;
1444 3b636f21 David Conrad
    uint8_t *dst[3] = {
1445
        s->framep[VP56_FRAME_CURRENT]->data[0] + 16*mb_y*s->linesize,
1446
        s->framep[VP56_FRAME_CURRENT]->data[1] +  8*mb_y*s->uvlinesize,
1447
        s->framep[VP56_FRAME_CURRENT]->data[2] +  8*mb_y*s->uvlinesize
1448
    };
1449
    int mb_x;
1450
1451
    for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1452 9ac831c2 David Conrad
        backup_mb_border(s->top_border[mb_x+1], dst[0], dst[1], dst[2], s->linesize, s->uvlinesize, 0);
1453 c55e0d34 Jason Garrett-Glaser
        filter_mb(s, dst, f++, mb_x, mb_y);
1454 3b636f21 David Conrad
        dst[0] += 16;
1455
        dst[1] += 8;
1456
        dst[2] += 8;
1457
    }
1458
}
1459
1460
static void filter_mb_row_simple(VP8Context *s, int mb_y)
1461
{
1462 968570d6 Jason Garrett-Glaser
    VP8FilterStrength *f = s->filter_strength;
1463
    uint8_t *dst = s->framep[VP56_FRAME_CURRENT]->data[0] + 16*mb_y*s->linesize;
1464 3b636f21 David Conrad
    int mb_x;
1465
1466
    for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1467 9ac831c2 David Conrad
        backup_mb_border(s->top_border[mb_x+1], dst, NULL, NULL, s->linesize, 0, 1);
1468 c55e0d34 Jason Garrett-Glaser
        filter_mb_simple(s, dst, f++, mb_x, mb_y);
1469 3b636f21 David Conrad
        dst += 16;
1470
    }
1471
}
1472
1473
static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
1474
                            AVPacket *avpkt)
1475
{
1476
    VP8Context *s = avctx->priv_data;
1477
    int ret, mb_x, mb_y, i, y, referenced;
1478
    enum AVDiscard skip_thresh;
1479 28e241de Carl Eugen Hoyos
    AVFrame *av_uninit(curframe);
1480 3b636f21 David Conrad
1481
    if ((ret = decode_frame_header(s, avpkt->data, avpkt->size)) < 0)
1482
        return ret;
1483
1484
    referenced = s->update_last || s->update_golden == VP56_FRAME_CURRENT
1485
                                || s->update_altref == VP56_FRAME_CURRENT;
1486
1487
    skip_thresh = !referenced ? AVDISCARD_NONREF :
1488
                    !s->keyframe ? AVDISCARD_NONKEY : AVDISCARD_ALL;
1489
1490
    if (avctx->skip_frame >= skip_thresh) {
1491
        s->invisible = 1;
1492
        goto skip_decode;
1493
    }
1494 9ac831c2 David Conrad
    s->deblock_filter = s->filter.level && avctx->skip_loop_filter < skip_thresh;
1495 3b636f21 David Conrad
1496
    for (i = 0; i < 4; i++)
1497
        if (&s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] &&
1498
            &s->frames[i] != s->framep[VP56_FRAME_GOLDEN] &&
1499
            &s->frames[i] != s->framep[VP56_FRAME_GOLDEN2]) {
1500
            curframe = s->framep[VP56_FRAME_CURRENT] = &s->frames[i];
1501
            break;
1502
        }
1503
    if (curframe->data[0])
1504
        avctx->release_buffer(avctx, curframe);
1505
1506
    curframe->key_frame = s->keyframe;
1507
    curframe->pict_type = s->keyframe ? FF_I_TYPE : FF_P_TYPE;
1508
    curframe->reference = referenced ? 3 : 0;
1509
    if ((ret = avctx->get_buffer(avctx, curframe))) {
1510
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed!\n");
1511
        return ret;
1512
    }
1513
1514
    // Given that arithmetic probabilities are updated every frame, it's quite likely
1515
    // that the values we have on a random interframe are complete junk if we didn't
1516
    // start decode on a keyframe. So just don't display anything rather than junk.
1517
    if (!s->keyframe && (!s->framep[VP56_FRAME_PREVIOUS] ||
1518
                         !s->framep[VP56_FRAME_GOLDEN] ||
1519
                         !s->framep[VP56_FRAME_GOLDEN2])) {
1520
        av_log(avctx, AV_LOG_WARNING, "Discarding interframe without a prior keyframe!\n");
1521
        return AVERROR_INVALIDDATA;
1522
    }
1523
1524
    s->linesize   = curframe->linesize[0];
1525
    s->uvlinesize = curframe->linesize[1];
1526
1527
    if (!s->edge_emu_buffer)
1528
        s->edge_emu_buffer = av_malloc(21*s->linesize);
1529
1530
    memset(s->top_nnz, 0, s->mb_width*sizeof(*s->top_nnz));
1531
1532 c55e0d34 Jason Garrett-Glaser
    /* Zero macroblock structures for top/left prediction from outside the frame. */
1533
    memset(s->macroblocks, 0, (s->mb_width + s->mb_height*2)*sizeof(*s->macroblocks));
1534
1535 3b636f21 David Conrad
    // top edge of 127 for intra prediction
1536 9ac831c2 David Conrad
    memset(s->top_border, 127, (s->mb_width+1)*sizeof(*s->top_border));
1537 c4211046 Jason Garrett-Glaser
    memset(s->ref_count, 0, sizeof(s->ref_count));
1538 d2840fa4 Pascal Massimino
    if (s->keyframe)
1539
        memset(s->intra4x4_pred_mode_top, DC_PRED, s->b4_stride*4);
1540 3b636f21 David Conrad
1541
    for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1542
        VP56RangeCoder *c = &s->coeff_partition[mb_y & (s->num_coeff_partitions-1)];
1543 c55e0d34 Jason Garrett-Glaser
        VP8Macroblock *mb = s->macroblocks + (s->mb_height - mb_y - 1)*2;
1544
        uint8_t *segment_map = s->segmentation_map + mb_y*s->mb_stride;
1545 ef38842f Jason Garrett-Glaser
        int mb_xy = mb_y * s->mb_stride;
1546 3b636f21 David Conrad
        uint8_t *dst[3] = {
1547
            curframe->data[0] + 16*mb_y*s->linesize,
1548
            curframe->data[1] +  8*mb_y*s->uvlinesize,
1549
            curframe->data[2] +  8*mb_y*s->uvlinesize
1550
        };
1551
1552
        memset(s->left_nnz, 0, sizeof(s->left_nnz));
1553 d2840fa4 Pascal Massimino
        AV_WN32A(s->intra4x4_pred_mode_left, DC_PRED*0x01010101);
1554 3b636f21 David Conrad
1555
        // left edge of 129 for intra prediction
1556
        if (!(avctx->flags & CODEC_FLAG_EMU_EDGE))
1557
            for (i = 0; i < 3; i++)
1558
                for (y = 0; y < 16>>!!i; y++)
1559
                    dst[i][y*curframe->linesize[i]-1] = 129;
1560 9ac831c2 David Conrad
        if (mb_y)
1561
            memset(s->top_border, 129, sizeof(*s->top_border));
1562 3b636f21 David Conrad
1563 ef38842f Jason Garrett-Glaser
        for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) {
1564 c55e0d34 Jason Garrett-Glaser
            uint8_t *segment_mb = segment_map+mb_x;
1565 d1c58fce Jason Garrett-Glaser
1566 d864dee8 Jason Garrett-Glaser
            /* Prefetch the current frame, 4 MBs ahead */
1567
            s->dsp.prefetch(dst[0] + (mb_x&3)*4*s->linesize + 64, s->linesize, 4);
1568
            s->dsp.prefetch(dst[1] + (mb_x&7)*s->uvlinesize + 64, dst[2] - dst[1], 2);
1569
1570 d2840fa4 Pascal Massimino
            decode_mb_mode(s, mb, mb_x, mb_y, segment_mb);
1571 3b636f21 David Conrad
1572 ef38842f Jason Garrett-Glaser
            prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_PREVIOUS);
1573 c4211046 Jason Garrett-Glaser
1574 3b636f21 David Conrad
            if (!mb->skip)
1575
                decode_mb_coeffs(s, c, mb, s->top_nnz[mb_x], s->left_nnz);
1576
1577 b946111f Jason Garrett-Glaser
            if (mb->mode <= MODE_I4x4)
1578 d2840fa4 Pascal Massimino
                intra_predict(s, dst, mb, mb_x, mb_y);
1579 b946111f Jason Garrett-Glaser
            else
1580 3b636f21 David Conrad
                inter_predict(s, dst, mb, mb_x, mb_y);
1581
1582 ef38842f Jason Garrett-Glaser
            prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_GOLDEN);
1583 c4211046 Jason Garrett-Glaser
1584 3b636f21 David Conrad
            if (!mb->skip) {
1585 8a467b2d Jason Garrett-Glaser
                idct_mb(s, dst, mb);
1586 3b636f21 David Conrad
            } else {
1587
                AV_ZERO64(s->left_nnz);
1588
                AV_WN64(s->top_nnz[mb_x], 0);   // array of 9, so unaligned
1589
1590
                // Reset DC block predictors if they would exist if the mb had coefficients
1591
                if (mb->mode != MODE_I4x4 && mb->mode != VP8_MVMODE_SPLIT) {
1592
                    s->left_nnz[8]      = 0;
1593
                    s->top_nnz[mb_x][8] = 0;
1594
                }
1595
            }
1596
1597 968570d6 Jason Garrett-Glaser
            if (s->deblock_filter)
1598
                filter_level_for_mb(s, mb, &s->filter_strength[mb_x]);
1599
1600 ef38842f Jason Garrett-Glaser
            prefetch_motion(s, mb, mb_x, mb_y, mb_xy, VP56_FRAME_GOLDEN2);
1601 c4211046 Jason Garrett-Glaser
1602 3b636f21 David Conrad
            dst[0] += 16;
1603
            dst[1] += 8;
1604
            dst[2] += 8;
1605
        }
1606 9ac831c2 David Conrad
        if (s->deblock_filter) {
1607 3b636f21 David Conrad
            if (s->filter.simple)
1608 9ac831c2 David Conrad
                filter_mb_row_simple(s, mb_y);
1609 3b636f21 David Conrad
            else
1610 9ac831c2 David Conrad
                filter_mb_row(s, mb_y);
1611 3b636f21 David Conrad
        }
1612
    }
1613
1614
skip_decode:
1615
    // if future frames don't use the updated probabilities,
1616
    // reset them to the values we saved
1617
    if (!s->update_probabilities)
1618
        s->prob[0] = s->prob[1];
1619
1620
    // check if golden and altref are swapped
1621
    if (s->update_altref == VP56_FRAME_GOLDEN &&
1622
        s->update_golden == VP56_FRAME_GOLDEN2)
1623
        FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN], s->framep[VP56_FRAME_GOLDEN2]);
1624
    else {
1625
        if (s->update_altref != VP56_FRAME_NONE)
1626
            s->framep[VP56_FRAME_GOLDEN2] = s->framep[s->update_altref];
1627
1628
        if (s->update_golden != VP56_FRAME_NONE)
1629
            s->framep[VP56_FRAME_GOLDEN] = s->framep[s->update_golden];
1630
    }
1631
1632
    if (s->update_last) // move cur->prev
1633
        s->framep[VP56_FRAME_PREVIOUS] = s->framep[VP56_FRAME_CURRENT];
1634
1635
    // release no longer referenced frames
1636
    for (i = 0; i < 4; i++)
1637
        if (s->frames[i].data[0] &&
1638
            &s->frames[i] != s->framep[VP56_FRAME_CURRENT] &&
1639
            &s->frames[i] != s->framep[VP56_FRAME_PREVIOUS] &&
1640
            &s->frames[i] != s->framep[VP56_FRAME_GOLDEN] &&
1641
            &s->frames[i] != s->framep[VP56_FRAME_GOLDEN2])
1642
            avctx->release_buffer(avctx, &s->frames[i]);
1643
1644
    if (!s->invisible) {
1645
        *(AVFrame*)data = *s->framep[VP56_FRAME_CURRENT];
1646
        *data_size = sizeof(AVFrame);
1647
    }
1648
1649
    return avpkt->size;
1650
}
1651
1652
static av_cold int vp8_decode_init(AVCodecContext *avctx)
1653
{
1654
    VP8Context *s = avctx->priv_data;
1655
1656
    s->avctx = avctx;
1657
    avctx->pix_fmt = PIX_FMT_YUV420P;
1658
1659
    dsputil_init(&s->dsp, avctx);
1660
    ff_h264_pred_init(&s->hpc, CODEC_ID_VP8);
1661
    ff_vp8dsp_init(&s->vp8dsp);
1662
1663
    // intra pred needs edge emulation among other things
1664
    if (avctx->flags&CODEC_FLAG_EMU_EDGE) {
1665 03ac56e7 Jason Garrett-Glaser
        av_log(avctx, AV_LOG_ERROR, "Edge emulation not supported\n");
1666 3b636f21 David Conrad
        return AVERROR_PATCHWELCOME;
1667
    }
1668
1669
    return 0;
1670
}
1671
1672
static av_cold int vp8_decode_free(AVCodecContext *avctx)
1673
{
1674
    vp8_decode_flush(avctx);
1675
    return 0;
1676
}
1677
1678
AVCodec vp8_decoder = {
1679
    "vp8",
1680
    AVMEDIA_TYPE_VIDEO,
1681
    CODEC_ID_VP8,
1682
    sizeof(VP8Context),
1683
    vp8_decode_init,
1684
    NULL,
1685
    vp8_decode_free,
1686
    vp8_decode_frame,
1687
    CODEC_CAP_DR1,
1688
    .flush = vp8_decode_flush,
1689
    .long_name = NULL_IF_CONFIG_SMALL("On2 VP8"),
1690
};