2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
25 * @author Stefan Gehrer <stefan.gehrer@gmx.de>
31 #include "h264chroma.h"
38 static const uint8_t alpha_tab[64] = {
39 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3,
40 4, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20,
41 22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,
42 46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
45 static const uint8_t beta_tab[64] = {
46 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
47 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6,
48 6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 14,
49 15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27
52 static const uint8_t tc_tab[64] = {
53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
54 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
55 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,
56 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9
59 /** mark block as unavailable, i.e. out of picture
60 * or not yet decoded */
61 static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL };
63 static const int8_t left_modifier_l[8] = { 0, -1, 6, -1, -1, 7, 6, 7 };
64 static const int8_t top_modifier_l[8] = { -1, 1, 5, -1, -1, 5, 7, 7 };
65 static const int8_t left_modifier_c[7] = { 5, -1, 2, -1, 6, 5, 6 };
66 static const int8_t top_modifier_c[7] = { 4, 1, -1, -1, 4, 6, 6 };
68 /*****************************************************************************
70 * in-loop deblocking filter
72 ****************************************************************************/
74 static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b)
76 if ((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
78 if((abs(mvP->x - mvQ->x) >= 4) ||
79 (abs(mvP->y - mvQ->y) >= 4) ||
80 (mvP->ref != mvQ->ref))
85 if((abs(mvP->x - mvQ->x) >= 4) ||
86 (abs(mvP->y - mvQ->y) >= 4) ||
87 (mvP->ref != mvQ->ref))
94 alpha = alpha_tab[av_clip_uintp2(qp_avg + h->alpha_offset, 6)]; \
95 beta = beta_tab[av_clip_uintp2(qp_avg + h->beta_offset, 6)]; \
96 tc = tc_tab[av_clip_uintp2(qp_avg + h->alpha_offset, 6)];
99 * in-loop deblocking filter for a single macroblock
101 * boundary strength (bs) mapping:
109 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
112 int qp_avg, alpha, beta, tc;
115 /* save un-deblocked lines */
116 h->topleft_border_y = h->top_border_y[h->mbx * 16 + 15];
117 h->topleft_border_u = h->top_border_u[h->mbx * 10 + 8];
118 h->topleft_border_v = h->top_border_v[h->mbx * 10 + 8];
119 memcpy(&h->top_border_y[h->mbx * 16], h->cy + 15 * h->l_stride, 16);
120 memcpy(&h->top_border_u[h->mbx * 10 + 1], h->cu + 7 * h->c_stride, 8);
121 memcpy(&h->top_border_v[h->mbx * 10 + 1], h->cv + 7 * h->c_stride, 8);
122 for (i = 0; i < 8; i++) {
123 h->left_border_y[i * 2 + 1] = *(h->cy + 15 + (i * 2 + 0) * h->l_stride);
124 h->left_border_y[i * 2 + 2] = *(h->cy + 15 + (i * 2 + 1) * h->l_stride);
125 h->left_border_u[i + 1] = *(h->cu + 7 + i * h->c_stride);
126 h->left_border_v[i + 1] = *(h->cv + 7 + i * h->c_stride);
128 if (!h->loop_filter_disable) {
130 if (mb_type == I_8X8)
134 if (ff_cavs_partition_flags[mb_type] & SPLITV) {
135 bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);
136 bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);
138 if (ff_cavs_partition_flags[mb_type] & SPLITH) {
139 bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);
140 bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);
142 bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);
143 bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);
144 bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);
145 bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);
148 if (h->flags & A_AVAIL) {
149 qp_avg = (h->qp + h->left_qp + 1) >> 1;
151 h->cdsp.cavs_filter_lv(h->cy, h->l_stride, alpha, beta, tc, bs[0], bs[1]);
152 qp_avg = (ff_cavs_chroma_qp[h->qp] + ff_cavs_chroma_qp[h->left_qp] + 1) >> 1;
154 h->cdsp.cavs_filter_cv(h->cu, h->c_stride, alpha, beta, tc, bs[0], bs[1]);
155 h->cdsp.cavs_filter_cv(h->cv, h->c_stride, alpha, beta, tc, bs[0], bs[1]);
159 h->cdsp.cavs_filter_lv(h->cy + 8, h->l_stride, alpha, beta, tc, bs[2], bs[3]);
160 h->cdsp.cavs_filter_lh(h->cy + 8 * h->l_stride, h->l_stride, alpha, beta, tc, bs[6], bs[7]);
162 if (h->flags & B_AVAIL) {
163 qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
165 h->cdsp.cavs_filter_lh(h->cy, h->l_stride, alpha, beta, tc, bs[4], bs[5]);
166 qp_avg = (ff_cavs_chroma_qp[h->qp] + ff_cavs_chroma_qp[h->top_qp[h->mbx]] + 1) >> 1;
168 h->cdsp.cavs_filter_ch(h->cu, h->c_stride, alpha, beta, tc, bs[4], bs[5]);
169 h->cdsp.cavs_filter_ch(h->cv, h->c_stride, alpha, beta, tc, bs[4], bs[5]);
174 h->top_qp[h->mbx] = h->qp;
179 /*****************************************************************************
181 * spatial intra prediction
183 ****************************************************************************/
185 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,
186 uint8_t **left, int block)
192 *left = h->left_border_y;
193 h->left_border_y[0] = h->left_border_y[1];
194 memset(&h->left_border_y[17], h->left_border_y[16], 9);
195 memcpy(&top[1], &h->top_border_y[h->mbx * 16], 16);
198 if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
199 h->left_border_y[0] = top[0] = h->topleft_border_y;
202 *left = h->intern_border_y;
203 for (i = 0; i < 8; i++)
204 h->intern_border_y[i + 1] = *(h->cy + 7 + i * h->l_stride);
205 memset(&h->intern_border_y[9], h->intern_border_y[8], 9);
206 h->intern_border_y[0] = h->intern_border_y[1];
207 memcpy(&top[1], &h->top_border_y[h->mbx * 16 + 8], 8);
208 if (h->flags & C_AVAIL)
209 memcpy(&top[9], &h->top_border_y[(h->mbx + 1) * 16], 8);
211 memset(&top[9], top[8], 9);
214 if (h->flags & B_AVAIL)
215 h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];
218 *left = &h->left_border_y[8];
219 memcpy(&top[1], h->cy + 7 * h->l_stride, 16);
222 if (h->flags & A_AVAIL)
223 top[0] = h->left_border_y[8];
226 *left = &h->intern_border_y[8];
227 for (i = 0; i < 8; i++)
228 h->intern_border_y[i + 9] = *(h->cy + 7 + (i + 8) * h->l_stride);
229 memset(&h->intern_border_y[17], h->intern_border_y[16], 9);
230 memcpy(&top[0], h->cy + 7 + 7 * h->l_stride, 9);
231 memset(&top[9], top[8], 9);
236 void ff_cavs_load_intra_pred_chroma(AVSContext *h)
238 /* extend borders by one pixel */
239 h->left_border_u[9] = h->left_border_u[8];
240 h->left_border_v[9] = h->left_border_v[8];
241 if(h->flags & C_AVAIL) {
242 h->top_border_u[h->mbx*10 + 9] = h->top_border_u[h->mbx*10 + 11];
243 h->top_border_v[h->mbx*10 + 9] = h->top_border_v[h->mbx*10 + 11];
245 h->top_border_u[h->mbx * 10 + 9] = h->top_border_u[h->mbx * 10 + 8];
246 h->top_border_v[h->mbx * 10 + 9] = h->top_border_v[h->mbx * 10 + 8];
248 if((h->flags & A_AVAIL) && (h->flags & B_AVAIL)) {
249 h->top_border_u[h->mbx * 10] = h->left_border_u[0] = h->topleft_border_u;
250 h->top_border_v[h->mbx * 10] = h->left_border_v[0] = h->topleft_border_v;
252 h->left_border_u[0] = h->left_border_u[1];
253 h->left_border_v[0] = h->left_border_v[1];
254 h->top_border_u[h->mbx * 10] = h->top_border_u[h->mbx * 10 + 1];
255 h->top_border_v[h->mbx * 10] = h->top_border_v[h->mbx * 10 + 1];
259 static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
262 uint64_t a = AV_RN64(&top[1]);
263 for (y = 0; y < 8; y++)
264 *((uint64_t *)(d + y * stride)) = a;
267 static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
271 for (y = 0; y < 8; y++) {
272 a = left[y + 1] * 0x0101010101010101ULL;
273 *((uint64_t *)(d + y * stride)) = a;
277 static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
280 uint64_t a = 0x8080808080808080ULL;
281 for (y = 0; y < 8; y++)
282 *((uint64_t *)(d + y * stride)) = a;
285 static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
290 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
292 for (x = 0; x < 4; x++) {
293 ih += (x + 1) * (top[5 + x] - top[3 - x]);
294 iv += (x + 1) * (left[5 + x] - left[3 - x]);
296 ia = (top[8] + left[8]) << 4;
297 ih = (17 * ih + 16) >> 5;
298 iv = (17 * iv + 16) >> 5;
299 for (y = 0; y < 8; y++)
300 for (x = 0; x < 8; x++)
301 d[y * stride + x] = cm[(ia + (x - 3) * ih + (y - 3) * iv + 16) >> 5];
304 #define LOWPASS(ARRAY, INDEX) \
305 ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)
307 static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
310 for (y = 0; y < 8; y++)
311 for (x = 0; x < 8; x++)
312 d[y * stride + x] = (LOWPASS(top, x + 1) + LOWPASS(left, y + 1)) >> 1;
315 static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
318 for (y = 0; y < 8; y++)
319 for (x = 0; x < 8; x++)
320 d[y * stride + x] = (LOWPASS(top, x + y + 2) + LOWPASS(left, x + y + 2)) >> 1;
323 static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
326 for (y = 0; y < 8; y++)
327 for (x = 0; x < 8; x++)
329 d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;
331 d[y * stride + x] = LOWPASS(top, x - y);
333 d[y * stride + x] = LOWPASS(left, y - x);
336 static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
339 for (y = 0; y < 8; y++)
340 for (x = 0; x < 8; x++)
341 d[y * stride + x] = LOWPASS(left, y + 1);
344 static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
347 for (y = 0; y < 8; y++)
348 for (x = 0; x < 8; x++)
349 d[y * stride + x] = LOWPASS(top, x + 1);
354 static inline void modify_pred(const int8_t *mod_table, int *mode)
356 *mode = mod_table[*mode];
358 av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
363 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
365 /* save pred modes before they get modified */
366 h->pred_mode_Y[3] = h->pred_mode_Y[5];
367 h->pred_mode_Y[6] = h->pred_mode_Y[8];
368 h->top_pred_Y[h->mbx * 2 + 0] = h->pred_mode_Y[7];
369 h->top_pred_Y[h->mbx * 2 + 1] = h->pred_mode_Y[8];
371 /* modify pred modes according to availability of neighbour samples */
372 if (!(h->flags & A_AVAIL)) {
373 modify_pred(left_modifier_l, &h->pred_mode_Y[4]);
374 modify_pred(left_modifier_l, &h->pred_mode_Y[7]);
375 modify_pred(left_modifier_c, pred_mode_uv);
377 if (!(h->flags & B_AVAIL)) {
378 modify_pred(top_modifier_l, &h->pred_mode_Y[4]);
379 modify_pred(top_modifier_l, &h->pred_mode_Y[5]);
380 modify_pred(top_modifier_c, pred_mode_uv);
384 /*****************************************************************************
386 * motion compensation
388 ****************************************************************************/
390 static inline void mc_dir_part(AVSContext *h, AVFrame *pic, int chroma_height,
391 int delta, int list, uint8_t *dest_y,
392 uint8_t *dest_cb, uint8_t *dest_cr,
393 int src_x_offset, int src_y_offset,
394 qpel_mc_func *qpix_op,
395 h264_chroma_mc_func chroma_op, cavs_vector *mv)
397 const int mx = mv->x + src_x_offset * 8;
398 const int my = mv->y + src_y_offset * 8;
399 const int luma_xy = (mx & 3) + ((my & 3) << 2);
400 uint8_t *src_y = pic->data[0] + (mx >> 2) + (my >> 2) * h->l_stride;
401 uint8_t *src_cb = pic->data[1] + (mx >> 3) + (my >> 3) * h->c_stride;
402 uint8_t *src_cr = pic->data[2] + (mx >> 3) + (my >> 3) * h->c_stride;
404 int extra_height = extra_width;
405 const int full_mx = mx >> 2;
406 const int full_my = my >> 2;
407 const int pic_width = 16 * h->mb_width;
408 const int pic_height = 16 * h->mb_height;
418 if (full_mx < 0 - extra_width ||
419 full_my < 0 - extra_height ||
420 full_mx + 16 /* FIXME */ > pic_width + extra_width ||
421 full_my + 16 /* FIXME */ > pic_height + extra_height) {
422 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
423 src_y - 2 - 2 * h->l_stride,
424 h->l_stride, h->l_stride,
425 16 + 5, 16 + 5 /* FIXME */,
426 full_mx - 2, full_my - 2,
427 pic_width, pic_height);
428 src_y = h->edge_emu_buffer + 2 + 2 * h->l_stride;
432 // FIXME try variable height perhaps?
433 qpix_op[luma_xy](dest_y, src_y, h->l_stride);
436 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
437 h->c_stride, h->c_stride,
440 pic_width >> 1, pic_height >> 1);
441 src_cb = h->edge_emu_buffer;
443 chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx & 7, my & 7);
446 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
447 h->c_stride, h->c_stride,
450 pic_width >> 1, pic_height >> 1);
451 src_cr = h->edge_emu_buffer;
453 chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx & 7, my & 7);
456 static inline void mc_part_std(AVSContext *h, int chroma_height, int delta,
460 int x_offset, int y_offset,
461 qpel_mc_func *qpix_put,
462 h264_chroma_mc_func chroma_put,
463 qpel_mc_func *qpix_avg,
464 h264_chroma_mc_func chroma_avg,
467 qpel_mc_func *qpix_op = qpix_put;
468 h264_chroma_mc_func chroma_op = chroma_put;
470 dest_y += x_offset * 2 + y_offset * h->l_stride * 2;
471 dest_cb += x_offset + y_offset * h->c_stride;
472 dest_cr += x_offset + y_offset * h->c_stride;
473 x_offset += 8 * h->mbx;
474 y_offset += 8 * h->mby;
477 AVFrame *ref = h->DPB[mv->ref].f;
478 mc_dir_part(h, ref, chroma_height, delta, 0,
479 dest_y, dest_cb, dest_cr, x_offset, y_offset,
480 qpix_op, chroma_op, mv);
483 chroma_op = chroma_avg;
486 if ((mv + MV_BWD_OFFS)->ref >= 0) {
487 AVFrame *ref = h->DPB[0].f;
488 mc_dir_part(h, ref, chroma_height, delta, 1,
489 dest_y, dest_cb, dest_cr, x_offset, y_offset,
490 qpix_op, chroma_op, mv + MV_BWD_OFFS);
494 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
496 if (ff_cavs_partition_flags[mb_type] == 0) { // 16x16
497 mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,
498 h->cdsp.put_cavs_qpel_pixels_tab[0],
499 h->h264chroma.put_h264_chroma_pixels_tab[0],
500 h->cdsp.avg_cavs_qpel_pixels_tab[0],
501 h->h264chroma.avg_h264_chroma_pixels_tab[0],
504 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,
505 h->cdsp.put_cavs_qpel_pixels_tab[1],
506 h->h264chroma.put_h264_chroma_pixels_tab[1],
507 h->cdsp.avg_cavs_qpel_pixels_tab[1],
508 h->h264chroma.avg_h264_chroma_pixels_tab[1],
510 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,
511 h->cdsp.put_cavs_qpel_pixels_tab[1],
512 h->h264chroma.put_h264_chroma_pixels_tab[1],
513 h->cdsp.avg_cavs_qpel_pixels_tab[1],
514 h->h264chroma.avg_h264_chroma_pixels_tab[1],
516 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,
517 h->cdsp.put_cavs_qpel_pixels_tab[1],
518 h->h264chroma.put_h264_chroma_pixels_tab[1],
519 h->cdsp.avg_cavs_qpel_pixels_tab[1],
520 h->h264chroma.avg_h264_chroma_pixels_tab[1],
522 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,
523 h->cdsp.put_cavs_qpel_pixels_tab[1],
524 h->h264chroma.put_h264_chroma_pixels_tab[1],
525 h->cdsp.avg_cavs_qpel_pixels_tab[1],
526 h->h264chroma.avg_h264_chroma_pixels_tab[1],
531 /*****************************************************************************
533 * motion vector prediction
535 ****************************************************************************/
537 static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,
538 cavs_vector *src, int distp)
540 int den = h->scale_den[FFMAX(src->ref, 0)];
542 *d_x = (src->x * distp * den + 256 + FF_SIGNBIT(src->x)) >> 9;
543 *d_y = (src->y * distp * den + 256 + FF_SIGNBIT(src->y)) >> 9;
546 static inline void mv_pred_median(AVSContext *h,
552 int ax, ay, bx, by, cx, cy;
553 int len_ab, len_bc, len_ca, len_mid;
555 /* scale candidates according to their temporal span */
556 scale_mv(h, &ax, &ay, mvA, mvP->dist);
557 scale_mv(h, &bx, &by, mvB, mvP->dist);
558 scale_mv(h, &cx, &cy, mvC, mvP->dist);
559 /* find the geometrical median of the three candidates */
560 len_ab = abs(ax - bx) + abs(ay - by);
561 len_bc = abs(bx - cx) + abs(by - cy);
562 len_ca = abs(cx - ax) + abs(cy - ay);
563 len_mid = mid_pred(len_ab, len_bc, len_ca);
564 if (len_mid == len_ab) {
567 } else if (len_mid == len_bc) {
576 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
577 enum cavs_mv_pred mode, enum cavs_block size, int ref)
579 cavs_vector *mvP = &h->mv[nP];
580 cavs_vector *mvA = &h->mv[nP-1];
581 cavs_vector *mvB = &h->mv[nP-4];
582 cavs_vector *mvC = &h->mv[nC];
583 const cavs_vector *mvP2 = NULL;
586 mvP->dist = h->dist[mvP->ref];
587 if (mvC->ref == NOT_AVAIL || (nP == MV_FWD_X3) || (nP == MV_BWD_X3 ))
588 mvC = &h->mv[nP - 5]; // set to top-left (mvD)
589 if (mode == MV_PRED_PSKIP &&
590 (mvA->ref == NOT_AVAIL ||
591 mvB->ref == NOT_AVAIL ||
592 (mvA->x | mvA->y | mvA->ref) == 0 ||
593 (mvB->x | mvB->y | mvB->ref) == 0)) {
595 /* if there is only one suitable candidate, take it */
596 } else if (mvA->ref >= 0 && mvB->ref < 0 && mvC->ref < 0) {
598 } else if (mvA->ref < 0 && mvB->ref >= 0 && mvC->ref < 0) {
600 } else if (mvA->ref < 0 && mvB->ref < 0 && mvC->ref >= 0) {
602 } else if (mode == MV_PRED_LEFT && mvA->ref == ref) {
604 } else if (mode == MV_PRED_TOP && mvB->ref == ref) {
606 } else if (mode == MV_PRED_TOPRIGHT && mvC->ref == ref) {
613 mv_pred_median(h, mvP, mvA, mvB, mvC);
615 if (mode < MV_PRED_PSKIP) {
616 int mx = get_se_golomb(&h->gb) + (unsigned)mvP->x;
617 int my = get_se_golomb(&h->gb) + (unsigned)mvP->y;
619 if (mx != (int16_t)mx || my != (int16_t)my) {
620 av_log(h->avctx, AV_LOG_ERROR, "MV %d %d out of supported range\n", mx, my);
629 /*****************************************************************************
633 ****************************************************************************/
636 * initialise predictors for motion vectors and intra prediction
638 void ff_cavs_init_mb(AVSContext *h)
642 /* copy predictors from top line (MB B and C) into cache */
643 for (i = 0; i < 3; i++) {
644 h->mv[MV_FWD_B2 + i] = h->top_mv[0][h->mbx * 2 + i];
645 h->mv[MV_BWD_B2 + i] = h->top_mv[1][h->mbx * 2 + i];
647 h->pred_mode_Y[1] = h->top_pred_Y[h->mbx * 2 + 0];
648 h->pred_mode_Y[2] = h->top_pred_Y[h->mbx * 2 + 1];
649 /* clear top predictors if MB B is not available */
650 if (!(h->flags & B_AVAIL)) {
651 h->mv[MV_FWD_B2] = un_mv;
652 h->mv[MV_FWD_B3] = un_mv;
653 h->mv[MV_BWD_B2] = un_mv;
654 h->mv[MV_BWD_B3] = un_mv;
655 h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
656 h->flags &= ~(C_AVAIL | D_AVAIL);
660 if (h->mbx == h->mb_width - 1) // MB C not available
661 h->flags &= ~C_AVAIL;
662 /* clear top-right predictors if MB C is not available */
663 if (!(h->flags & C_AVAIL)) {
664 h->mv[MV_FWD_C2] = un_mv;
665 h->mv[MV_BWD_C2] = un_mv;
667 /* clear top-left predictors if MB D is not available */
668 if (!(h->flags & D_AVAIL)) {
669 h->mv[MV_FWD_D3] = un_mv;
670 h->mv[MV_BWD_D3] = un_mv;
675 * save predictors for later macroblocks and increase
677 * @return 0 if end of frame is reached, 1 otherwise
679 int ff_cavs_next_mb(AVSContext *h)
687 /* copy mvs as predictors to the left */
688 for (i = 0; i <= 20; i += 4)
689 h->mv[i] = h->mv[i + 2];
690 /* copy bottom mvs from cache to top line */
691 h->top_mv[0][h->mbx * 2 + 0] = h->mv[MV_FWD_X2];
692 h->top_mv[0][h->mbx * 2 + 1] = h->mv[MV_FWD_X3];
693 h->top_mv[1][h->mbx * 2 + 0] = h->mv[MV_BWD_X2];
694 h->top_mv[1][h->mbx * 2 + 1] = h->mv[MV_BWD_X3];
695 /* next MB address */
698 if (h->mbx == h->mb_width) { // New mb line
699 h->flags = B_AVAIL | C_AVAIL;
700 /* clear left pred_modes */
701 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
702 /* clear left mv predictors */
703 for (i = 0; i <= 20; i += 4)
707 /* re-calculate sample pointers */
708 h->cy = h->cur.f->data[0] + h->mby * 16 * h->l_stride;
709 h->cu = h->cur.f->data[1] + h->mby * 8 * h->c_stride;
710 h->cv = h->cur.f->data[2] + h->mby * 8 * h->c_stride;
711 if (h->mby == h->mb_height) { // Frame end
718 /*****************************************************************************
722 ****************************************************************************/
724 int ff_cavs_init_pic(AVSContext *h)
728 /* clear some predictors */
729 for (i = 0; i <= 20; i += 4)
731 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
732 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
733 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
734 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
735 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
736 h->cy = h->cur.f->data[0];
737 h->cu = h->cur.f->data[1];
738 h->cv = h->cur.f->data[2];
739 h->l_stride = h->cur.f->linesize[0];
740 h->c_stride = h->cur.f->linesize[1];
741 h->luma_scan[2] = 8 * h->l_stride;
742 h->luma_scan[3] = 8 * h->l_stride + 8;
743 h->mbx = h->mby = h->mbidx = 0;
749 /*****************************************************************************
751 * headers and interface
753 ****************************************************************************/
756 * some predictions require data from the top-neighbouring macroblock.
757 * this data has to be stored for one complete row of macroblocks
758 * and this storage space is allocated here
760 int ff_cavs_init_top_lines(AVSContext *h)
762 /* alloc top line of predictors */
763 h->top_qp = av_mallocz(h->mb_width);
764 h->top_mv[0] = av_mallocz_array(h->mb_width * 2 + 1, sizeof(cavs_vector));
765 h->top_mv[1] = av_mallocz_array(h->mb_width * 2 + 1, sizeof(cavs_vector));
766 h->top_pred_Y = av_mallocz_array(h->mb_width * 2, sizeof(*h->top_pred_Y));
767 h->top_border_y = av_mallocz_array(h->mb_width + 1, 16);
768 h->top_border_u = av_mallocz_array(h->mb_width, 10);
769 h->top_border_v = av_mallocz_array(h->mb_width, 10);
771 /* alloc space for co-located MVs and types */
772 h->col_mv = av_mallocz_array(h->mb_width * h->mb_height,
773 4 * sizeof(cavs_vector));
774 h->col_type_base = av_mallocz(h->mb_width * h->mb_height);
775 h->block = av_mallocz(64 * sizeof(int16_t));
777 if (!h->top_qp || !h->top_mv[0] || !h->top_mv[1] || !h->top_pred_Y ||
778 !h->top_border_y || !h->top_border_u || !h->top_border_v ||
779 !h->col_mv || !h->col_type_base || !h->block) {
780 av_freep(&h->top_qp);
781 av_freep(&h->top_mv[0]);
782 av_freep(&h->top_mv[1]);
783 av_freep(&h->top_pred_Y);
784 av_freep(&h->top_border_y);
785 av_freep(&h->top_border_u);
786 av_freep(&h->top_border_v);
787 av_freep(&h->col_mv);
788 av_freep(&h->col_type_base);
790 return AVERROR(ENOMEM);
795 av_cold int ff_cavs_init(AVCodecContext *avctx)
797 AVSContext *h = avctx->priv_data;
799 ff_blockdsp_init(&h->bdsp, avctx);
800 ff_h264chroma_init(&h->h264chroma, 8);
801 ff_idctdsp_init(&h->idsp, avctx);
802 ff_videodsp_init(&h->vdsp, 8);
803 ff_cavsdsp_init(&h->cdsp, avctx);
804 ff_init_scantable_permutation(h->idsp.idct_permutation,
806 ff_init_scantable(h->idsp.idct_permutation, &h->scantable, ff_zigzag_direct);
809 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
811 h->cur.f = av_frame_alloc();
812 h->DPB[0].f = av_frame_alloc();
813 h->DPB[1].f = av_frame_alloc();
814 if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {
816 return AVERROR(ENOMEM);
821 h->intra_pred_l[INTRA_L_VERT] = intra_pred_vert;
822 h->intra_pred_l[INTRA_L_HORIZ] = intra_pred_horiz;
823 h->intra_pred_l[INTRA_L_LP] = intra_pred_lp;
824 h->intra_pred_l[INTRA_L_DOWN_LEFT] = intra_pred_down_left;
825 h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
826 h->intra_pred_l[INTRA_L_LP_LEFT] = intra_pred_lp_left;
827 h->intra_pred_l[INTRA_L_LP_TOP] = intra_pred_lp_top;
828 h->intra_pred_l[INTRA_L_DC_128] = intra_pred_dc_128;
829 h->intra_pred_c[INTRA_C_LP] = intra_pred_lp;
830 h->intra_pred_c[INTRA_C_HORIZ] = intra_pred_horiz;
831 h->intra_pred_c[INTRA_C_VERT] = intra_pred_vert;
832 h->intra_pred_c[INTRA_C_PLANE] = intra_pred_plane;
833 h->intra_pred_c[INTRA_C_LP_LEFT] = intra_pred_lp_left;
834 h->intra_pred_c[INTRA_C_LP_TOP] = intra_pred_lp_top;
835 h->intra_pred_c[INTRA_C_DC_128] = intra_pred_dc_128;
841 av_cold int ff_cavs_end(AVCodecContext *avctx)
843 AVSContext *h = avctx->priv_data;
845 av_frame_free(&h->cur.f);
846 av_frame_free(&h->DPB[0].f);
847 av_frame_free(&h->DPB[1].f);
849 av_freep(&h->top_qp);
850 av_freep(&h->top_mv[0]);
851 av_freep(&h->top_mv[1]);
852 av_freep(&h->top_pred_Y);
853 av_freep(&h->top_border_y);
854 av_freep(&h->top_border_u);
855 av_freep(&h->top_border_v);
856 av_freep(&h->col_mv);
857 av_freep(&h->col_type_base);
859 av_freep(&h->edge_emu_buffer);