Libav
cavs.c
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1 /*
2  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3  * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
28 #include "avcodec.h"
29 #include "get_bits.h"
30 #include "golomb.h"
31 #include "h264chroma.h"
32 #include "mathops.h"
33 #include "cavs.h"
34 
35 static const uint8_t alpha_tab[64] = {
36  0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3,
37  4, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20,
38  22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,
39  46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
40 };
41 
42 static const uint8_t beta_tab[64] = {
43  0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
44  2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6,
45  6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 14,
46  15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27
47 };
48 
49 static const uint8_t tc_tab[64] = {
50  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
51  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
52  2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,
53  5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9
54 };
55 
58 static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL };
59 
60 static const int8_t left_modifier_l[8] = { 0, -1, 6, -1, -1, 7, 6, 7 };
61 static const int8_t top_modifier_l[8] = { -1, 1, 5, -1, -1, 5, 7, 7 };
62 static const int8_t left_modifier_c[7] = { 5, -1, 2, -1, 6, 5, 6 };
63 static const int8_t top_modifier_c[7] = { 4, 1, -1, -1, 4, 6, 6 };
64 
65 /*****************************************************************************
66  *
67  * in-loop deblocking filter
68  *
69  ****************************************************************************/
70 
71 static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b)
72 {
73  if ((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
74  return 2;
75  if ((abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4))
76  return 1;
77  if (b) {
78  mvP += MV_BWD_OFFS;
79  mvQ += MV_BWD_OFFS;
80  if ((abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4))
81  return 1;
82  } else {
83  if (mvP->ref != mvQ->ref)
84  return 1;
85  }
86  return 0;
87 }
88 
89 #define SET_PARAMS \
90  alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)]; \
91  beta = beta_tab[av_clip(qp_avg + h->beta_offset, 0, 63)]; \
92  tc = tc_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)];
93 
106 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
107 {
108  uint8_t bs[8];
109  int qp_avg, alpha, beta, tc;
110  int i;
111 
112  /* save un-deblocked lines */
113  h->topleft_border_y = h->top_border_y[h->mbx * 16 + 15];
114  h->topleft_border_u = h->top_border_u[h->mbx * 10 + 8];
115  h->topleft_border_v = h->top_border_v[h->mbx * 10 + 8];
116  memcpy(&h->top_border_y[h->mbx * 16], h->cy + 15 * h->l_stride, 16);
117  memcpy(&h->top_border_u[h->mbx * 10 + 1], h->cu + 7 * h->c_stride, 8);
118  memcpy(&h->top_border_v[h->mbx * 10 + 1], h->cv + 7 * h->c_stride, 8);
119  for (i = 0; i < 8; i++) {
120  h->left_border_y[i * 2 + 1] = *(h->cy + 15 + (i * 2 + 0) * h->l_stride);
121  h->left_border_y[i * 2 + 2] = *(h->cy + 15 + (i * 2 + 1) * h->l_stride);
122  h->left_border_u[i + 1] = *(h->cu + 7 + i * h->c_stride);
123  h->left_border_v[i + 1] = *(h->cv + 7 + i * h->c_stride);
124  }
125  if (!h->loop_filter_disable) {
126  /* determine bs */
127  if (mb_type == I_8X8)
128  memset(bs, 2, 8);
129  else {
130  memset(bs, 0, 8);
131  if (ff_cavs_partition_flags[mb_type] & SPLITV) {
132  bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);
133  bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);
134  }
135  if (ff_cavs_partition_flags[mb_type] & SPLITH) {
136  bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);
137  bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);
138  }
139  bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);
140  bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);
141  bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);
142  bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);
143  }
144  if (AV_RN64(bs)) {
145  if (h->flags & A_AVAIL) {
146  qp_avg = (h->qp + h->left_qp + 1) >> 1;
147  SET_PARAMS;
148  h->cdsp.cavs_filter_lv(h->cy, h->l_stride, alpha, beta, tc, bs[0], bs[1]);
149  h->cdsp.cavs_filter_cv(h->cu, h->c_stride, alpha, beta, tc, bs[0], bs[1]);
150  h->cdsp.cavs_filter_cv(h->cv, h->c_stride, alpha, beta, tc, bs[0], bs[1]);
151  }
152  qp_avg = h->qp;
153  SET_PARAMS;
154  h->cdsp.cavs_filter_lv(h->cy + 8, h->l_stride, alpha, beta, tc, bs[2], bs[3]);
155  h->cdsp.cavs_filter_lh(h->cy + 8 * h->l_stride, h->l_stride, alpha, beta, tc, bs[6], bs[7]);
156 
157  if (h->flags & B_AVAIL) {
158  qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
159  SET_PARAMS;
160  h->cdsp.cavs_filter_lh(h->cy, h->l_stride, alpha, beta, tc, bs[4], bs[5]);
161  h->cdsp.cavs_filter_ch(h->cu, h->c_stride, alpha, beta, tc, bs[4], bs[5]);
162  h->cdsp.cavs_filter_ch(h->cv, h->c_stride, alpha, beta, tc, bs[4], bs[5]);
163  }
164  }
165  }
166  h->left_qp = h->qp;
167  h->top_qp[h->mbx] = h->qp;
168 }
169 
170 #undef SET_PARAMS
171 
172 /*****************************************************************************
173  *
174  * spatial intra prediction
175  *
176  ****************************************************************************/
177 
179  uint8_t **left, int block)
180 {
181  int i;
182 
183  switch (block) {
184  case 0:
185  *left = h->left_border_y;
186  h->left_border_y[0] = h->left_border_y[1];
187  memset(&h->left_border_y[17], h->left_border_y[16], 9);
188  memcpy(&top[1], &h->top_border_y[h->mbx * 16], 16);
189  top[17] = top[16];
190  top[0] = top[1];
191  if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
192  h->left_border_y[0] = top[0] = h->topleft_border_y;
193  break;
194  case 1:
195  *left = h->intern_border_y;
196  for (i = 0; i < 8; i++)
197  h->intern_border_y[i + 1] = *(h->cy + 7 + i * h->l_stride);
198  memset(&h->intern_border_y[9], h->intern_border_y[8], 9);
199  h->intern_border_y[0] = h->intern_border_y[1];
200  memcpy(&top[1], &h->top_border_y[h->mbx * 16 + 8], 8);
201  if (h->flags & C_AVAIL)
202  memcpy(&top[9], &h->top_border_y[(h->mbx + 1) * 16], 8);
203  else
204  memset(&top[9], top[8], 9);
205  top[17] = top[16];
206  top[0] = top[1];
207  if (h->flags & B_AVAIL)
208  h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];
209  break;
210  case 2:
211  *left = &h->left_border_y[8];
212  memcpy(&top[1], h->cy + 7 * h->l_stride, 16);
213  top[17] = top[16];
214  top[0] = top[1];
215  if (h->flags & A_AVAIL)
216  top[0] = h->left_border_y[8];
217  break;
218  case 3:
219  *left = &h->intern_border_y[8];
220  for (i = 0; i < 8; i++)
221  h->intern_border_y[i + 9] = *(h->cy + 7 + (i + 8) * h->l_stride);
222  memset(&h->intern_border_y[17], h->intern_border_y[16], 9);
223  memcpy(&top[0], h->cy + 7 + 7 * h->l_stride, 9);
224  memset(&top[9], top[8], 9);
225  break;
226  }
227 }
228 
230 {
231  /* extend borders by one pixel */
232  h->left_border_u[9] = h->left_border_u[8];
233  h->left_border_v[9] = h->left_border_v[8];
234  h->top_border_u[h->mbx * 10 + 9] = h->top_border_u[h->mbx * 10 + 8];
235  h->top_border_v[h->mbx * 10 + 9] = h->top_border_v[h->mbx * 10 + 8];
236  if (h->mbx && h->mby) {
237  h->top_border_u[h->mbx * 10] = h->left_border_u[0] = h->topleft_border_u;
238  h->top_border_v[h->mbx * 10] = h->left_border_v[0] = h->topleft_border_v;
239  } else {
240  h->left_border_u[0] = h->left_border_u[1];
241  h->left_border_v[0] = h->left_border_v[1];
242  h->top_border_u[h->mbx * 10] = h->top_border_u[h->mbx * 10 + 1];
243  h->top_border_v[h->mbx * 10] = h->top_border_v[h->mbx * 10 + 1];
244  }
245 }
246 
247 static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
248 {
249  int y;
250  uint64_t a = AV_RN64(&top[1]);
251  for (y = 0; y < 8; y++)
252  *((uint64_t *)(d + y * stride)) = a;
253 }
254 
255 static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
256 {
257  int y;
258  uint64_t a;
259  for (y = 0; y < 8; y++) {
260  a = left[y + 1] * 0x0101010101010101ULL;
261  *((uint64_t *)(d + y * stride)) = a;
262  }
263 }
264 
265 static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
266 {
267  int y;
268  uint64_t a = 0x8080808080808080ULL;
269  for (y = 0; y < 8; y++)
270  *((uint64_t *)(d + y * stride)) = a;
271 }
272 
273 static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
274 {
275  int x, y, ia;
276  int ih = 0;
277  int iv = 0;
278  const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
279 
280  for (x = 0; x < 4; x++) {
281  ih += (x + 1) * (top[5 + x] - top[3 - x]);
282  iv += (x + 1) * (left[5 + x] - left[3 - x]);
283  }
284  ia = (top[8] + left[8]) << 4;
285  ih = (17 * ih + 16) >> 5;
286  iv = (17 * iv + 16) >> 5;
287  for (y = 0; y < 8; y++)
288  for (x = 0; x < 8; x++)
289  d[y * stride + x] = cm[(ia + (x - 3) * ih + (y - 3) * iv + 16) >> 5];
290 }
291 
292 #define LOWPASS(ARRAY, INDEX) \
293  ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)
294 
295 static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
296 {
297  int x, y;
298  for (y = 0; y < 8; y++)
299  for (x = 0; x < 8; x++)
300  d[y * stride + x] = (LOWPASS(top, x + 1) + LOWPASS(left, y + 1)) >> 1;
301 }
302 
303 static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
304 {
305  int x, y;
306  for (y = 0; y < 8; y++)
307  for (x = 0; x < 8; x++)
308  d[y * stride + x] = (LOWPASS(top, x + y + 2) + LOWPASS(left, x + y + 2)) >> 1;
309 }
310 
311 static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
312 {
313  int x, y;
314  for (y = 0; y < 8; y++)
315  for (x = 0; x < 8; x++)
316  if (x == y)
317  d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;
318  else if (x > y)
319  d[y * stride + x] = LOWPASS(top, x - y);
320  else
321  d[y * stride + x] = LOWPASS(left, y - x);
322 }
323 
324 static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
325 {
326  int x, y;
327  for (y = 0; y < 8; y++)
328  for (x = 0; x < 8; x++)
329  d[y * stride + x] = LOWPASS(left, y + 1);
330 }
331 
332 static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
333 {
334  int x, y;
335  for (y = 0; y < 8; y++)
336  for (x = 0; x < 8; x++)
337  d[y * stride + x] = LOWPASS(top, x + 1);
338 }
339 
340 #undef LOWPASS
341 
342 static inline void modify_pred(const int8_t *mod_table, int *mode)
343 {
344  *mode = mod_table[*mode];
345  if (*mode < 0) {
346  av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
347  *mode = 0;
348  }
349 }
350 
351 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
352 {
353  /* save pred modes before they get modified */
354  h->pred_mode_Y[3] = h->pred_mode_Y[5];
355  h->pred_mode_Y[6] = h->pred_mode_Y[8];
356  h->top_pred_Y[h->mbx * 2 + 0] = h->pred_mode_Y[7];
357  h->top_pred_Y[h->mbx * 2 + 1] = h->pred_mode_Y[8];
358 
359  /* modify pred modes according to availability of neighbour samples */
360  if (!(h->flags & A_AVAIL)) {
363  modify_pred(left_modifier_c, pred_mode_uv);
364  }
365  if (!(h->flags & B_AVAIL)) {
368  modify_pred(top_modifier_c, pred_mode_uv);
369  }
370 }
371 
372 /*****************************************************************************
373  *
374  * motion compensation
375  *
376  ****************************************************************************/
377 
378 static inline void mc_dir_part(AVSContext *h, AVFrame *pic, int chroma_height,
379  int delta, int list, uint8_t *dest_y,
380  uint8_t *dest_cb, uint8_t *dest_cr,
381  int src_x_offset, int src_y_offset,
382  qpel_mc_func *qpix_op,
383  h264_chroma_mc_func chroma_op, cavs_vector *mv)
384 {
385  const int mx = mv->x + src_x_offset * 8;
386  const int my = mv->y + src_y_offset * 8;
387  const int luma_xy = (mx & 3) + ((my & 3) << 2);
388  uint8_t *src_y = pic->data[0] + (mx >> 2) + (my >> 2) * h->l_stride;
389  uint8_t *src_cb = pic->data[1] + (mx >> 3) + (my >> 3) * h->c_stride;
390  uint8_t *src_cr = pic->data[2] + (mx >> 3) + (my >> 3) * h->c_stride;
391  int extra_width = 0;
392  int extra_height = extra_width;
393  const int full_mx = mx >> 2;
394  const int full_my = my >> 2;
395  const int pic_width = 16 * h->mb_width;
396  const int pic_height = 16 * h->mb_height;
397  int emu = 0;
398 
399  if (!pic->data[0])
400  return;
401  if (mx & 7)
402  extra_width -= 3;
403  if (my & 7)
404  extra_height -= 3;
405 
406  if (full_mx < 0 - extra_width ||
407  full_my < 0 - extra_height ||
408  full_mx + 16 /* FIXME */ > pic_width + extra_width ||
409  full_my + 16 /* FIXME */ > pic_height + extra_height) {
411  src_y - 2 - 2 * h->l_stride,
412  h->l_stride, h->l_stride,
413  16 + 5, 16 + 5 /* FIXME */,
414  full_mx - 2, full_my - 2,
415  pic_width, pic_height);
416  src_y = h->edge_emu_buffer + 2 + 2 * h->l_stride;
417  emu = 1;
418  }
419 
420  // FIXME try variable height perhaps?
421  qpix_op[luma_xy](dest_y, src_y, h->l_stride);
422 
423  if (emu) {
424  h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
425  h->c_stride, h->c_stride,
426  9, 9 /* FIXME */,
427  mx >> 3, my >> 3,
428  pic_width >> 1, pic_height >> 1);
429  src_cb = h->edge_emu_buffer;
430  }
431  chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx & 7, my & 7);
432 
433  if (emu) {
434  h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
435  h->c_stride, h->c_stride,
436  9, 9 /* FIXME */,
437  mx >> 3, my >> 3,
438  pic_width >> 1, pic_height >> 1);
439  src_cr = h->edge_emu_buffer;
440  }
441  chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx & 7, my & 7);
442 }
443 
444 static inline void mc_part_std(AVSContext *h, int chroma_height, int delta,
445  uint8_t *dest_y,
446  uint8_t *dest_cb,
447  uint8_t *dest_cr,
448  int x_offset, int y_offset,
449  qpel_mc_func *qpix_put,
450  h264_chroma_mc_func chroma_put,
451  qpel_mc_func *qpix_avg,
452  h264_chroma_mc_func chroma_avg,
453  cavs_vector *mv)
454 {
455  qpel_mc_func *qpix_op = qpix_put;
456  h264_chroma_mc_func chroma_op = chroma_put;
457 
458  dest_y += x_offset * 2 + y_offset * h->l_stride * 2;
459  dest_cb += x_offset + y_offset * h->c_stride;
460  dest_cr += x_offset + y_offset * h->c_stride;
461  x_offset += 8 * h->mbx;
462  y_offset += 8 * h->mby;
463 
464  if (mv->ref >= 0) {
465  AVFrame *ref = h->DPB[mv->ref].f;
466  mc_dir_part(h, ref, chroma_height, delta, 0,
467  dest_y, dest_cb, dest_cr, x_offset, y_offset,
468  qpix_op, chroma_op, mv);
469 
470  qpix_op = qpix_avg;
471  chroma_op = chroma_avg;
472  }
473 
474  if ((mv + MV_BWD_OFFS)->ref >= 0) {
475  AVFrame *ref = h->DPB[0].f;
476  mc_dir_part(h, ref, chroma_height, delta, 1,
477  dest_y, dest_cb, dest_cr, x_offset, y_offset,
478  qpix_op, chroma_op, mv + MV_BWD_OFFS);
479  }
480 }
481 
482 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
483 {
484  if (ff_cavs_partition_flags[mb_type] == 0) { // 16x16
485  mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,
490  &h->mv[MV_FWD_X0]);
491  } else {
492  mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,
497  &h->mv[MV_FWD_X0]);
498  mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,
503  &h->mv[MV_FWD_X1]);
504  mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,
509  &h->mv[MV_FWD_X2]);
510  mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,
515  &h->mv[MV_FWD_X3]);
516  }
517 }
518 
519 /*****************************************************************************
520  *
521  * motion vector prediction
522  *
523  ****************************************************************************/
524 
525 static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,
526  cavs_vector *src, int distp)
527 {
528  int den = h->scale_den[src->ref];
529 
530  *d_x = (src->x * distp * den + 256 + (src->x >> 31)) >> 9;
531  *d_y = (src->y * distp * den + 256 + (src->y >> 31)) >> 9;
532 }
533 
534 static inline void mv_pred_median(AVSContext *h,
535  cavs_vector *mvP,
536  cavs_vector *mvA,
537  cavs_vector *mvB,
538  cavs_vector *mvC)
539 {
540  int ax, ay, bx, by, cx, cy;
541  int len_ab, len_bc, len_ca, len_mid;
542 
543  /* scale candidates according to their temporal span */
544  scale_mv(h, &ax, &ay, mvA, mvP->dist);
545  scale_mv(h, &bx, &by, mvB, mvP->dist);
546  scale_mv(h, &cx, &cy, mvC, mvP->dist);
547  /* find the geometrical median of the three candidates */
548  len_ab = abs(ax - bx) + abs(ay - by);
549  len_bc = abs(bx - cx) + abs(by - cy);
550  len_ca = abs(cx - ax) + abs(cy - ay);
551  len_mid = mid_pred(len_ab, len_bc, len_ca);
552  if (len_mid == len_ab) {
553  mvP->x = cx;
554  mvP->y = cy;
555  } else if (len_mid == len_bc) {
556  mvP->x = ax;
557  mvP->y = ay;
558  } else {
559  mvP->x = bx;
560  mvP->y = by;
561  }
562 }
563 
564 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
565  enum cavs_mv_pred mode, enum cavs_block size, int ref)
566 {
567  cavs_vector *mvP = &h->mv[nP];
568  cavs_vector *mvA = &h->mv[nP-1];
569  cavs_vector *mvB = &h->mv[nP-4];
570  cavs_vector *mvC = &h->mv[nC];
571  const cavs_vector *mvP2 = NULL;
572 
573  mvP->ref = ref;
574  mvP->dist = h->dist[mvP->ref];
575  if (mvC->ref == NOT_AVAIL)
576  mvC = &h->mv[nP - 5]; // set to top-left (mvD)
577  if (mode == MV_PRED_PSKIP &&
578  (mvA->ref == NOT_AVAIL ||
579  mvB->ref == NOT_AVAIL ||
580  (mvA->x | mvA->y | mvA->ref) == 0 ||
581  (mvB->x | mvB->y | mvB->ref) == 0)) {
582  mvP2 = &un_mv;
583  /* if there is only one suitable candidate, take it */
584  } else if (mvA->ref >= 0 && mvB->ref < 0 && mvC->ref < 0) {
585  mvP2 = mvA;
586  } else if (mvA->ref < 0 && mvB->ref >= 0 && mvC->ref < 0) {
587  mvP2 = mvB;
588  } else if (mvA->ref < 0 && mvB->ref < 0 && mvC->ref >= 0) {
589  mvP2 = mvC;
590  } else if (mode == MV_PRED_LEFT && mvA->ref == ref) {
591  mvP2 = mvA;
592  } else if (mode == MV_PRED_TOP && mvB->ref == ref) {
593  mvP2 = mvB;
594  } else if (mode == MV_PRED_TOPRIGHT && mvC->ref == ref) {
595  mvP2 = mvC;
596  }
597  if (mvP2) {
598  mvP->x = mvP2->x;
599  mvP->y = mvP2->y;
600  } else
601  mv_pred_median(h, mvP, mvA, mvB, mvC);
602 
603  if (mode < MV_PRED_PSKIP) {
604  mvP->x += get_se_golomb(&h->gb);
605  mvP->y += get_se_golomb(&h->gb);
606  }
607  set_mvs(mvP, size);
608 }
609 
610 /*****************************************************************************
611  *
612  * macroblock level
613  *
614  ****************************************************************************/
615 
620 {
621  int i;
622 
623  /* copy predictors from top line (MB B and C) into cache */
624  for (i = 0; i < 3; i++) {
625  h->mv[MV_FWD_B2 + i] = h->top_mv[0][h->mbx * 2 + i];
626  h->mv[MV_BWD_B2 + i] = h->top_mv[1][h->mbx * 2 + i];
627  }
628  h->pred_mode_Y[1] = h->top_pred_Y[h->mbx * 2 + 0];
629  h->pred_mode_Y[2] = h->top_pred_Y[h->mbx * 2 + 1];
630  /* clear top predictors if MB B is not available */
631  if (!(h->flags & B_AVAIL)) {
632  h->mv[MV_FWD_B2] = un_mv;
633  h->mv[MV_FWD_B3] = un_mv;
634  h->mv[MV_BWD_B2] = un_mv;
635  h->mv[MV_BWD_B3] = un_mv;
636  h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
637  h->flags &= ~(C_AVAIL | D_AVAIL);
638  } else if (h->mbx) {
639  h->flags |= D_AVAIL;
640  }
641  if (h->mbx == h->mb_width - 1) // MB C not available
642  h->flags &= ~C_AVAIL;
643  /* clear top-right predictors if MB C is not available */
644  if (!(h->flags & C_AVAIL)) {
645  h->mv[MV_FWD_C2] = un_mv;
646  h->mv[MV_BWD_C2] = un_mv;
647  }
648  /* clear top-left predictors if MB D is not available */
649  if (!(h->flags & D_AVAIL)) {
650  h->mv[MV_FWD_D3] = un_mv;
651  h->mv[MV_BWD_D3] = un_mv;
652  }
653 }
654 
661 {
662  int i;
663 
664  h->flags |= A_AVAIL;
665  h->cy += 16;
666  h->cu += 8;
667  h->cv += 8;
668  /* copy mvs as predictors to the left */
669  for (i = 0; i <= 20; i += 4)
670  h->mv[i] = h->mv[i + 2];
671  /* copy bottom mvs from cache to top line */
672  h->top_mv[0][h->mbx * 2 + 0] = h->mv[MV_FWD_X2];
673  h->top_mv[0][h->mbx * 2 + 1] = h->mv[MV_FWD_X3];
674  h->top_mv[1][h->mbx * 2 + 0] = h->mv[MV_BWD_X2];
675  h->top_mv[1][h->mbx * 2 + 1] = h->mv[MV_BWD_X3];
676  /* next MB address */
677  h->mbidx++;
678  h->mbx++;
679  if (h->mbx == h->mb_width) { // New mb line
680  h->flags = B_AVAIL | C_AVAIL;
681  /* clear left pred_modes */
682  h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
683  /* clear left mv predictors */
684  for (i = 0; i <= 20; i += 4)
685  h->mv[i] = un_mv;
686  h->mbx = 0;
687  h->mby++;
688  /* re-calculate sample pointers */
689  h->cy = h->cur.f->data[0] + h->mby * 16 * h->l_stride;
690  h->cu = h->cur.f->data[1] + h->mby * 8 * h->c_stride;
691  h->cv = h->cur.f->data[2] + h->mby * 8 * h->c_stride;
692  if (h->mby == h->mb_height) { // Frame end
693  return 0;
694  }
695  }
696  return 1;
697 }
698 
699 /*****************************************************************************
700  *
701  * frame level
702  *
703  ****************************************************************************/
704 
706 {
707  int i;
708 
709  /* clear some predictors */
710  for (i = 0; i <= 20; i += 4)
711  h->mv[i] = un_mv;
713  set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
715  set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
716  h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
717  h->cy = h->cur.f->data[0];
718  h->cu = h->cur.f->data[1];
719  h->cv = h->cur.f->data[2];
720  h->l_stride = h->cur.f->linesize[0];
721  h->c_stride = h->cur.f->linesize[1];
722  h->luma_scan[2] = 8 * h->l_stride;
723  h->luma_scan[3] = 8 * h->l_stride + 8;
724  h->mbx = h->mby = h->mbidx = 0;
725  h->flags = 0;
726 }
727 
728 /*****************************************************************************
729  *
730  * headers and interface
731  *
732  ****************************************************************************/
733 
740 {
741  /* alloc top line of predictors */
742  h->top_qp = av_mallocz(h->mb_width);
743  h->top_mv[0] = av_mallocz((h->mb_width * 2 + 1) * sizeof(cavs_vector));
744  h->top_mv[1] = av_mallocz((h->mb_width * 2 + 1) * sizeof(cavs_vector));
745  h->top_pred_Y = av_mallocz(h->mb_width * 2 * sizeof(*h->top_pred_Y));
746  h->top_border_y = av_mallocz((h->mb_width + 1) * 16);
747  h->top_border_u = av_mallocz(h->mb_width * 10);
748  h->top_border_v = av_mallocz(h->mb_width * 10);
749 
750  /* alloc space for co-located MVs and types */
751  h->col_mv = av_mallocz(h->mb_width * h->mb_height * 4 *
752  sizeof(cavs_vector));
754  h->block = av_mallocz(64 * sizeof(int16_t));
755 }
756 
758 {
759  AVSContext *h = avctx->priv_data;
760 
761  ff_dsputil_init(&h->dsp, avctx);
763  ff_videodsp_init(&h->vdsp, 8);
764  ff_cavsdsp_init(&h->cdsp, avctx);
766  h->cdsp.idct_perm);
768 
769  h->avctx = avctx;
770  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
771 
772  h->cur.f = av_frame_alloc();
773  h->DPB[0].f = av_frame_alloc();
774  h->DPB[1].f = av_frame_alloc();
775  if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {
776  ff_cavs_end(avctx);
777  return AVERROR(ENOMEM);
778  }
779 
780  h->luma_scan[0] = 0;
781  h->luma_scan[1] = 8;
797  h->mv[7] = un_mv;
798  h->mv[19] = un_mv;
799  return 0;
800 }
801 
803 {
804  AVSContext *h = avctx->priv_data;
805 
806  av_frame_free(&h->cur.f);
807  av_frame_free(&h->DPB[0].f);
808  av_frame_free(&h->DPB[1].f);
809 
810  av_free(h->top_qp);
811  av_free(h->top_mv[0]);
812  av_free(h->top_mv[1]);
813  av_free(h->top_pred_Y);
814  av_free(h->top_border_y);
815  av_free(h->top_border_u);
816  av_free(h->top_border_v);
817  av_free(h->col_mv);
819  av_free(h->block);
821  return 0;
822 }
cavs_mv_loc
Definition: cavs.h:119
void(* intra_pred_c[7])(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.h:228
uint8_t * top_border_v
Definition: cavs.h:222
uint8_t * top_border_u
Definition: cavs.h:222
void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
Definition: cavs.c:351
uint8_t topleft_border_y
Definition: cavs.h:225
av_cold void ff_dsputil_init(DSPContext *c, AVCodecContext *avctx)
Definition: dsputil.c:2440
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, int idct_permutation_type)
Definition: dsputil.c:130
AVCodecContext * avctx
Definition: cavs.h:163
#define ff_cropTbl
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:107
uint8_t * edge_emu_buffer
Definition: cavs.h:236
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:179
void(* cavs_filter_cv)(uint8_t *pix, int stride, int alpha, int beta, int tc, int bs1, int bs2)
Definition: cavsdsp.h:33
static int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b)
Definition: cavs.c:71
static const int8_t left_modifier_c[7]
Definition: cavs.c:62
Definition: cavs.h:61
int16_t x
Definition: cavs.h:143
av_cold int ff_cavs_end(AVCodecContext *avctx)
Definition: cavs.c:802
int mbidx
macroblock coordinates
Definition: cavs.h:184
void(* cavs_filter_lv)(uint8_t *pix, int stride, int alpha, int beta, int tc, int bs1, int bs2)
Definition: cavsdsp.h:31
static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:332
cavs_vector * col_mv
Definition: cavs.h:205
#define MAX_NEG_CROP
Definition: dsputil.h:44
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1247
#define A_AVAIL
Definition: cavs.h:38
void ff_cavs_init_mb(AVSContext *h)
initialise predictors for motion vectors and intra prediction
Definition: cavs.c:619
av_cold void ff_h264chroma_init(H264ChromaContext *c, int bit_depth)
Definition: h264chroma.c:39
int qp
Definition: cavs.h:215
int loop_filter_disable
Definition: cavs.h:181
int stride
Definition: mace.c:144
void(* cavs_filter_lh)(uint8_t *pix, int stride, int alpha, int beta, int tc, int bs1, int bs2)
Definition: cavsdsp.h:32
int left_qp
Definition: cavs.h:188
uint8_t intern_border_y[26]
Definition: cavs.h:224
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
cavs_mb
Definition: cavs.h:60
#define MV_BWD_OFFS
Definition: cavs.h:57
int mbx
Definition: cavs.h:184
ScanTable scantable
Definition: cavs.h:218
uint8_t
#define av_cold
Definition: attributes.h:66
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:43
float delta
#define SPLITH
Definition: cavs.h:54
uint8_t * top_qp
Definition: cavs.h:189
static const int8_t left_modifier_l[8]
Definition: cavs.c:60
#define b
Definition: input.c:52
uint8_t * top_border_y
intra prediction is done with un-deblocked samples they are saved here before deblocking the MB ...
Definition: cavs.h:222
av_cold void ff_cavsdsp_init(CAVSDSPContext *c, AVCodecContext *avctx)
Definition: cavsdsp.c:535
cavs_vector mv[2 *4 *3]
mv motion vector cache 0: D3 B2 B3 C2 4: A1 X0 X1 - 8: A3 X2 X3 -
Definition: cavs.h:203
cavs_vector * top_mv[2]
Definition: cavs.h:204
static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:273
bitstream reader API header.
uint8_t idct_permutation[64]
idct input permutation.
Definition: dsputil.h:240
void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
in-loop deblocking filter for a single macroblock
Definition: cavs.c:106
int dist[2]
temporal distances from current frame to ref frames
Definition: cavs.h:171
int mby
Definition: cavs.h:184
GetBitContext gb
Definition: cavs.h:168
uint8_t * cy
Definition: cavs.h:187
#define cm
Definition: dvbsubdec.c:34
#define D_AVAIL
Definition: cavs.h:41
static void scale_mv(AVSContext *h, int *d_x, int *d_y, cavs_vector *src, int distp)
Definition: cavs.c:525
uint8_t topleft_border_u
Definition: cavs.h:225
static void mv_pred_median(AVSContext *h, cavs_vector *mvP, cavs_vector *mvA, cavs_vector *mvB, cavs_vector *mvC)
Definition: cavs.c:534
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
uint8_t * cu
Definition: cavs.h:187
Definition: cavs.h:66
int scale_den[2]
for scaling neighbouring MVs
Definition: cavs.h:234
AVSFrame cur
currently decoded frame
Definition: cavs.h:169
#define SET_PARAMS
Definition: cavs.c:89
int ff_cavs_next_mb(AVSContext *h)
save predictors for later macroblocks and increase macroblock address
Definition: cavs.c:660
#define AVERROR(e)
Definition: error.h:43
void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
Definition: cavs.c:482
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:55
CAVSDSPContext cdsp
Definition: cavs.h:167
static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:265
uint8_t left_border_y[26]
Definition: cavs.h:223
#define C_AVAIL
Definition: cavs.h:40
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:148
static const uint8_t beta_tab[64]
Definition: cavs.c:42
void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, uint8_t **left, int block)
Definition: cavs.c:178
static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:324
AVSFrame DPB[2]
reference frames
Definition: cavs.h:170
static const int8_t top_modifier_c[7]
Definition: cavs.c:63
#define B_AVAIL
Definition: cavs.h:39
uint8_t * cv
current MB sample pointers
Definition: cavs.h:187
void ff_cavs_load_intra_pred_chroma(AVSContext *h)
Definition: cavs.c:229
av_cold void ff_videodsp_init(VideoDSPContext *ctx, int bpc)
Definition: videodsp.c:37
static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:255
void ff_cavs_init_pic(AVSContext *h)
Definition: cavs.c:705
qpel_mc_func put_cavs_qpel_pixels_tab[2][16]
Definition: cavsdsp.h:29
#define NOT_AVAIL
Definition: cavs.h:42
av_cold int ff_cavs_init(AVCodecContext *avctx)
Definition: cavs.c:757
int16_t dist
Definition: cavs.h:145
uint8_t left_border_u[10]
Definition: cavs.h:223
static const uint8_t tc_tab[64]
Definition: cavs.c:49
const uint8_t ff_cavs_partition_flags[30]
Definition: cavsdata.c:24
int16_t * block
Definition: cavs.h:239
void ff_cavs_init_top_lines(AVSContext *h)
some predictions require data from the top-neighbouring macroblock.
Definition: cavs.c:739
void(* intra_pred_l[8])(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.h:227
const cavs_vector ff_cavs_dir_mv
mark block as "no prediction from this direction" e.g.
Definition: cavsdata.c:59
h264_chroma_mc_func avg_h264_chroma_pixels_tab[3]
Definition: h264chroma.h:28
DSPContext dsp
Definition: cavs.h:164
uint8_t left_border_v[10]
Definition: cavs.h:223
void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, enum cavs_mv_pred mode, enum cavs_block size, int ref)
Definition: cavs.c:564
static void modify_pred(const int8_t *mod_table, int *mode)
Definition: cavs.c:342
if(ac->has_optimized_func)
static const int8_t mv[256][2]
Definition: 4xm.c:72
NULL
Definition: eval.c:55
Libavcodec external API header.
static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:295
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:125
main external API structure.
Definition: avcodec.h:1054
static void mc_dir_part(AVSContext *h, AVFrame *pic, int chroma_height, int delta, int list, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int src_x_offset, int src_y_offset, qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op, cavs_vector *mv)
Definition: cavs.c:378
void(* qpel_mc_func)(uint8_t *dst, uint8_t *src, ptrdiff_t stride)
Definition: dsputil.h:81
int pred_mode_Y[3 *3]
luma pred mode cache 0: – B2 B3 3: A1 X0 X1 6: A3 X2 X3
Definition: cavs.h:211
cavs_block
Definition: cavs.h:112
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: dsputil.c:107
#define SPLITV
Definition: cavs.h:55
int * top_pred_Y
Definition: cavs.h:212
static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:303
int idct_perm
Definition: cavsdsp.h:36
int16_t ref
Definition: cavs.h:146
#define mid_pred
Definition: mathops.h:94
qpel_mc_func avg_cavs_qpel_pixels_tab[2][16]
Definition: cavsdsp.h:30
ptrdiff_t c_stride
Definition: cavs.h:213
#define LOWPASS(ARRAY, INDEX)
Definition: cavs.c:292
uint8_t topleft_border_v
Definition: cavs.h:225
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:113
void(* h264_chroma_mc_func)(uint8_t *dst, uint8_t *src, int srcStride, int h, int x, int y)
Definition: h264chroma.h:24
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:113
static const int8_t top_modifier_l[8]
Definition: cavs.c:61
cavs_mv_pred
Definition: cavs.h:103
int flags
availability flags of neighbouring macroblocks
Definition: cavs.h:185
ptrdiff_t l_stride
Definition: cavs.h:213
int luma_scan[4]
Definition: cavs.h:214
int mb_height
Definition: cavs.h:175
static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:247
void * priv_data
Definition: avcodec.h:1090
h264_chroma_mc_func put_h264_chroma_pixels_tab[3]
Definition: h264chroma.h:27
#define REF_INTRA
Definition: cavs.h:43
static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
Definition: cavs.c:311
#define AV_RN64(p)
Definition: intreadwrite.h:330
static const cavs_vector un_mv
mark block as unavailable, i.e.
Definition: cavs.c:58
static void set_mvs(cavs_vector *mv, enum cavs_block size)
Definition: cavs.h:246
void(* cavs_filter_ch)(uint8_t *pix, int stride, int alpha, int beta, int tc, int bs1, int bs2)
Definition: cavsdsp.h:34
int16_t y
Definition: cavs.h:144
VideoDSPContext vdsp
Definition: cavs.h:166
exp golomb vlc stuff
H264ChromaContext h264chroma
Definition: cavs.h:165
void(* emulated_edge_mc)(uint8_t *buf, const uint8_t *src, ptrdiff_t buf_linesize, ptrdiff_t src_linesize, int block_w, int block_h, int src_x, int src_y, int w, int h)
Copy a rectangular area of samples to a temporary buffer and replicate the border samples...
Definition: videodsp.h:52
static const uint8_t alpha_tab[64]
Definition: cavs.c:35
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205
int mb_width
Definition: cavs.h:175
AVFrame * f
Definition: cavs.h:158
uint8_t * col_type_base
Definition: cavs.h:229
static void mc_part_std(AVSContext *h, int chroma_height, int delta, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int x_offset, int y_offset, qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put, qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg, cavs_vector *mv)
Definition: cavs.c:444
static int16_t block[64]
Definition: dct-test.c:170