2 * VP9 compatible video decoder
4 * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
5 * Copyright (C) 2013 Clément Bœsch <u pkh me>
7 * This file is part of Libav.
9 * Libav is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * Libav is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with Libav; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "libavutil/buffer.h"
31 #include "libavutil/internal.h"
43 TX_SWITCHABLE = N_TXFM_SIZES,
83 PARTITION_NONE, // [ ] <-.
86 PARTITION_SPLIT, // [+] --'
103 typedef struct ProbContext {
104 uint8_t y_mode[4][9];
105 uint8_t uv_mode[10][9];
106 uint8_t filter[4][2];
107 uint8_t mv_mode[7][3];
110 uint8_t single_ref[5][2];
122 uint8_t class0_fp[2][3];
127 uint8_t partition[4][4][3];
130 typedef void (*vp9_mc_func)(uint8_t *dst, const uint8_t *ref,
131 ptrdiff_t dst_stride,
132 ptrdiff_t ref_stride,
133 int h, int mx, int my);
135 typedef struct VP9DSPContext {
137 * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32
138 * dimension 2: intra prediction modes
140 * dst/left/top is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
141 * stride is aligned by 16 pixels
142 * top[-1] is top/left; top[4,7] is top-right for 4x4
144 // FIXME(rbultje) maybe replace left/top pointers with HAVE_TOP/
145 // HAVE_LEFT/HAVE_TOPRIGHT flags instead, and then handle it in-place?
146 // also needs to fit in with what H.264/VP8/etc do
147 void (*intra_pred[N_TXFM_SIZES][N_INTRA_PRED_MODES])(uint8_t *dst,
153 * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32, 4=lossless (3-4=dct only)
154 * dimension 2: 0=dct/dct, 1=dct/adst, 2=adst/dct, 3=adst/adst
156 * dst is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
157 * stride is aligned by 16 pixels
158 * block is 16-byte aligned
159 * eob indicates the position (+1) of the last non-zero coefficient,
160 * in scan-order. This can be used to write faster versions, e.g. a
161 * dc-only 4x4/8x8/16x16/32x32, or a 4x4-only (eob<10) 8x8/16x16/32x32,
164 // FIXME also write idct_add_block() versions for whole (inter) pred
165 // blocks, so we can do 2 4x4s at once
166 void (*itxfm_add[N_TXFM_SIZES + 1][N_TXFM_TYPES])(uint8_t *dst,
168 int16_t *block, int eob);
171 * dimension 1: width of filter (0=4, 1=8, 2=16)
172 * dimension 2: 0=col-edge filter (h), 1=row-edge filter (v)
174 * dst/stride are aligned by 8
176 void (*loop_filter_8[3][2])(uint8_t *dst, ptrdiff_t stride,
177 int mb_lim, int lim, int hev_thr);
180 * dimension 1: 0=col-edge filter (h), 1=row-edge filter (v)
182 * The width of filter is assumed to be 16; dst/stride are aligned by 16
184 void (*loop_filter_16[2])(uint8_t *dst, ptrdiff_t stride,
185 int mb_lim, int lim, int hev_thr);
188 * dimension 1/2: width of filter (0=4, 1=8) for each filter half
189 * dimension 3: 0=col-edge filter (h), 1=row-edge filter (v)
191 * dst/stride are aligned by operation size
192 * this basically calls loop_filter[d1][d3][0](), followed by
193 * loop_filter[d2][d3][0]() on the next 8 pixels
194 * mb_lim/lim/hev_thr contain two values in the lowest two bytes of the
197 // FIXME perhaps a mix4 that operates on 32px (for AVX2)
198 void (*loop_filter_mix2[2][2][2])(uint8_t *dst, ptrdiff_t stride,
199 int mb_lim, int lim, int hev_thr);
202 * dimension 1: hsize (0: 64, 1: 32, 2: 16, 3: 8, 4: 4)
203 * dimension 2: filter type (0: smooth, 1: regular, 2: sharp, 3: bilin)
204 * dimension 3: averaging type (0: put, 1: avg)
205 * dimension 4: x subpel interpolation (0: none, 1: 8tap/bilin)
206 * dimension 5: y subpel interpolation (1: none, 1: 8tap/bilin)
208 * dst/stride are aligned by hsize
210 vp9_mc_func mc[5][4][2][2][2];
219 typedef struct VP9MVRefPair {
224 typedef struct VP9Filter {
225 uint8_t level[8 * 8];
226 uint8_t /* bit=col */ mask[2 /* 0=y, 1=uv */][2 /* 0=col, 1=row */]
227 [8 /* rows */][4 /* 0=16, 1=8, 2=4, 3=inner4 */];
230 typedef struct VP9Frame {
233 uint8_t *segmentation_map;
236 AVBufferRef *segmentation_map_buf;
264 typedef struct VP9Block {
265 uint8_t seg_id, intra, comp, ref[2], mode[4], uvmode, skip;
266 enum FilterMode filter;
267 VP56mv mv[4 /* b_idx */][2 /* ref */];
269 enum TxfmMode tx, uvtx;
271 int row, row7, col, col7;
273 ptrdiff_t y_stride, uv_stride;
276 enum BlockPartition bp;
279 typedef struct VP9Context {
281 VideoDSPContext vdsp;
299 uint8_t keyframe, last_keyframe;
301 uint8_t use_last_frame_mvs;
309 uint8_t refreshrefmask;
310 uint8_t highprecisionmvs;
311 enum FilterMode filtermode;
312 uint8_t allowcompinter;
315 uint8_t parallelmode;
319 uint8_t varcompref[2];
331 uint8_t mblim_lut[64];
339 int8_t ydc_qdelta, uvdc_qdelta, uvac_qdelta;
344 uint8_t absolute_vals;
346 #define MAX_SEGMENT 8
351 uint8_t skip_enabled;
360 unsigned log2_tile_cols, log2_tile_rows;
361 unsigned tile_cols, tile_rows;
362 unsigned tile_row_start, tile_row_end, tile_col_start, tile_col_end;
364 unsigned sb_cols, sb_rows, rows, cols;
367 uint8_t coef[4][2][2][6][6][3];
371 uint8_t coef[4][2][2][6][6][11];
376 unsigned y_mode[4][10];
377 unsigned uv_mode[10][10];
378 unsigned filter[4][3];
379 unsigned mv_mode[7][4];
380 unsigned intra[4][2];
382 unsigned single_ref[5][2][2];
383 unsigned comp_ref[5][2];
384 unsigned tx32p[2][4];
385 unsigned tx16p[2][3];
388 unsigned mv_joint[4];
391 unsigned classes[11];
393 unsigned bits[10][2];
394 unsigned class0_fp[2][4];
396 unsigned class0_hp[2];
399 unsigned partition[4][4][4];
400 unsigned coef[4][2][2][6][6][3];
401 unsigned eob[4][2][2][6][6][2];
403 enum TxfmMode txfmmode;
404 enum CompPredMode comppredmode;
406 // contextual (left/above) cache
407 uint8_t left_partition_ctx[8], *above_partition_ctx;
408 uint8_t left_mode_ctx[16], *above_mode_ctx;
409 // FIXME maybe merge some of the below in a flags field?
410 uint8_t left_y_nnz_ctx[16], *above_y_nnz_ctx;
411 uint8_t left_uv_nnz_ctx[2][8], *above_uv_nnz_ctx[2];
412 uint8_t left_skip_ctx[8], *above_skip_ctx; // 1bit
413 uint8_t left_txfm_ctx[8], *above_txfm_ctx; // 2bit
414 uint8_t left_segpred_ctx[8], *above_segpred_ctx; // 1bit
415 uint8_t left_intra_ctx[8], *above_intra_ctx; // 1bit
416 uint8_t left_comp_ctx[8], *above_comp_ctx; // 1bit
417 uint8_t left_ref_ctx[8], *above_ref_ctx; // 2bit
418 uint8_t left_filter_ctx[8], *above_filter_ctx;
419 VP56mv left_mv_ctx[16][2], (*above_mv_ctx)[2];
422 uint8_t *intra_pred_data[3];
424 DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[71 * 80];
426 // block reconstruction intermediates
427 int16_t *block_base, *block, *uvblock_base[2], *uvblock[2];
428 uint8_t *eob_base, *uveob_base[2], *eob, *uveob[2];
429 struct { int x, y; } min_mv, max_mv;
430 DECLARE_ALIGNED(32, uint8_t, tmp_y)[64 * 64];
431 DECLARE_ALIGNED(32, uint8_t, tmp_uv)[2][32 * 32];
434 void ff_vp9dsp_init(VP9DSPContext *dsp);
436 void ff_vp9dsp_init_x86(VP9DSPContext *dsp);
438 void ff_vp9_fill_mv(VP9Context *s, VP56mv *mv, int mode, int sb);
440 void ff_vp9_adapt_probs(VP9Context *s);
442 int ff_vp9_decode_block(AVCodecContext *avctx, int row, int col,
443 VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,
444 enum BlockLevel bl, enum BlockPartition bp);
446 #endif /* AVCODEC_VP9_H */