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 Libav.
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.
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.
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
24 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
25 * @author Stefan Gehrer <stefan.gehrer@gmx.de>
29 #include "bitstream.h"
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) || (abs(mvP->y - mvQ->y) >= 4))
83 if ((abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4))
86 if (mvP->ref != mvQ->ref)
93 alpha = alpha_tab[av_clip_uintp2(qp_avg + h->alpha_offset, 6)]; \
94 beta = beta_tab[av_clip_uintp2(qp_avg + h->beta_offset, 6)]; \
95 tc = tc_tab[av_clip_uintp2(qp_avg + h->alpha_offset, 6)];
98 * in-loop deblocking filter for a single macroblock
100 * boundary strength (bs) mapping:
108 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
111 int qp_avg, alpha, beta, tc;
114 /* save un-deblocked lines */
115 h->topleft_border_y = h->top_border_y[h->mbx * 16 + 15];
116 h->topleft_border_u = h->top_border_u[h->mbx * 10 + 8];
117 h->topleft_border_v = h->top_border_v[h->mbx * 10 + 8];
118 memcpy(&h->top_border_y[h->mbx * 16], h->cy + 15 * h->l_stride, 16);
119 memcpy(&h->top_border_u[h->mbx * 10 + 1], h->cu + 7 * h->c_stride, 8);
120 memcpy(&h->top_border_v[h->mbx * 10 + 1], h->cv + 7 * h->c_stride, 8);
121 for (i = 0; i < 8; i++) {
122 h->left_border_y[i * 2 + 1] = *(h->cy + 15 + (i * 2 + 0) * h->l_stride);
123 h->left_border_y[i * 2 + 2] = *(h->cy + 15 + (i * 2 + 1) * h->l_stride);
124 h->left_border_u[i + 1] = *(h->cu + 7 + i * h->c_stride);
125 h->left_border_v[i + 1] = *(h->cv + 7 + i * h->c_stride);
127 if (!h->loop_filter_disable) {
129 if (mb_type == I_8X8)
133 if (ff_cavs_partition_flags[mb_type] & SPLITV) {
134 bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);
135 bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);
137 if (ff_cavs_partition_flags[mb_type] & SPLITH) {
138 bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);
139 bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);
141 bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);
142 bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);
143 bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);
144 bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);
147 if (h->flags & A_AVAIL) {
148 qp_avg = (h->qp + h->left_qp + 1) >> 1;
150 h->cdsp.cavs_filter_lv(h->cy, h->l_stride, alpha, beta, tc, bs[0], bs[1]);
151 h->cdsp.cavs_filter_cv(h->cu, h->c_stride, alpha, beta, tc, bs[0], bs[1]);
152 h->cdsp.cavs_filter_cv(h->cv, h->c_stride, alpha, beta, tc, bs[0], bs[1]);
156 h->cdsp.cavs_filter_lv(h->cy + 8, h->l_stride, alpha, beta, tc, bs[2], bs[3]);
157 h->cdsp.cavs_filter_lh(h->cy + 8 * h->l_stride, h->l_stride, alpha, beta, tc, bs[6], bs[7]);
159 if (h->flags & B_AVAIL) {
160 qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
162 h->cdsp.cavs_filter_lh(h->cy, h->l_stride, alpha, beta, tc, bs[4], bs[5]);
163 h->cdsp.cavs_filter_ch(h->cu, h->c_stride, alpha, beta, tc, bs[4], bs[5]);
164 h->cdsp.cavs_filter_ch(h->cv, h->c_stride, alpha, beta, tc, bs[4], bs[5]);
169 h->top_qp[h->mbx] = h->qp;
174 /*****************************************************************************
176 * spatial intra prediction
178 ****************************************************************************/
180 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,
181 uint8_t **left, int block)
187 *left = h->left_border_y;
188 h->left_border_y[0] = h->left_border_y[1];
189 memset(&h->left_border_y[17], h->left_border_y[16], 9);
190 memcpy(&top[1], &h->top_border_y[h->mbx * 16], 16);
193 if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
194 h->left_border_y[0] = top[0] = h->topleft_border_y;
197 *left = h->intern_border_y;
198 for (i = 0; i < 8; i++)
199 h->intern_border_y[i + 1] = *(h->cy + 7 + i * h->l_stride);
200 memset(&h->intern_border_y[9], h->intern_border_y[8], 9);
201 h->intern_border_y[0] = h->intern_border_y[1];
202 memcpy(&top[1], &h->top_border_y[h->mbx * 16 + 8], 8);
203 if (h->flags & C_AVAIL)
204 memcpy(&top[9], &h->top_border_y[(h->mbx + 1) * 16], 8);
206 memset(&top[9], top[8], 9);
209 if (h->flags & B_AVAIL)
210 h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];
213 *left = &h->left_border_y[8];
214 memcpy(&top[1], h->cy + 7 * h->l_stride, 16);
217 if (h->flags & A_AVAIL)
218 top[0] = h->left_border_y[8];
221 *left = &h->intern_border_y[8];
222 for (i = 0; i < 8; i++)
223 h->intern_border_y[i + 9] = *(h->cy + 7 + (i + 8) * h->l_stride);
224 memset(&h->intern_border_y[17], h->intern_border_y[16], 9);
225 memcpy(&top[0], h->cy + 7 + 7 * h->l_stride, 9);
226 memset(&top[9], top[8], 9);
231 void ff_cavs_load_intra_pred_chroma(AVSContext *h)
233 /* extend borders by one pixel */
234 h->left_border_u[9] = h->left_border_u[8];
235 h->left_border_v[9] = h->left_border_v[8];
236 h->top_border_u[h->mbx * 10 + 9] = h->top_border_u[h->mbx * 10 + 8];
237 h->top_border_v[h->mbx * 10 + 9] = h->top_border_v[h->mbx * 10 + 8];
238 if (h->mbx && h->mby) {
239 h->top_border_u[h->mbx * 10] = h->left_border_u[0] = h->topleft_border_u;
240 h->top_border_v[h->mbx * 10] = h->left_border_v[0] = h->topleft_border_v;
242 h->left_border_u[0] = h->left_border_u[1];
243 h->left_border_v[0] = h->left_border_v[1];
244 h->top_border_u[h->mbx * 10] = h->top_border_u[h->mbx * 10 + 1];
245 h->top_border_v[h->mbx * 10] = h->top_border_v[h->mbx * 10 + 1];
249 static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
252 uint64_t a = AV_RN64(&top[1]);
253 for (y = 0; y < 8; y++)
254 *((uint64_t *)(d + y * stride)) = a;
257 static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
261 for (y = 0; y < 8; y++) {
262 a = left[y + 1] * 0x0101010101010101ULL;
263 *((uint64_t *)(d + y * stride)) = a;
267 static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
270 uint64_t a = 0x8080808080808080ULL;
271 for (y = 0; y < 8; y++)
272 *((uint64_t *)(d + y * stride)) = a;
275 static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
280 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
282 for (x = 0; x < 4; x++) {
283 ih += (x + 1) * (top[5 + x] - top[3 - x]);
284 iv += (x + 1) * (left[5 + x] - left[3 - x]);
286 ia = (top[8] + left[8]) << 4;
287 ih = (17 * ih + 16) >> 5;
288 iv = (17 * iv + 16) >> 5;
289 for (y = 0; y < 8; y++)
290 for (x = 0; x < 8; x++)
291 d[y * stride + x] = cm[(ia + (x - 3) * ih + (y - 3) * iv + 16) >> 5];
294 #define LOWPASS(ARRAY, INDEX) \
295 ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)
297 static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
300 for (y = 0; y < 8; y++)
301 for (x = 0; x < 8; x++)
302 d[y * stride + x] = (LOWPASS(top, x + 1) + LOWPASS(left, y + 1)) >> 1;
305 static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
308 for (y = 0; y < 8; y++)
309 for (x = 0; x < 8; x++)
310 d[y * stride + x] = (LOWPASS(top, x + y + 2) + LOWPASS(left, x + y + 2)) >> 1;
313 static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
316 for (y = 0; y < 8; y++)
317 for (x = 0; x < 8; x++)
319 d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;
321 d[y * stride + x] = LOWPASS(top, x - y);
323 d[y * stride + x] = LOWPASS(left, y - x);
326 static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
329 for (y = 0; y < 8; y++)
330 for (x = 0; x < 8; x++)
331 d[y * stride + x] = LOWPASS(left, y + 1);
334 static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
337 for (y = 0; y < 8; y++)
338 for (x = 0; x < 8; x++)
339 d[y * stride + x] = LOWPASS(top, x + 1);
344 static inline void modify_pred(const int8_t *mod_table, int *mode)
346 *mode = mod_table[*mode];
348 av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
353 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
355 /* save pred modes before they get modified */
356 h->pred_mode_Y[3] = h->pred_mode_Y[5];
357 h->pred_mode_Y[6] = h->pred_mode_Y[8];
358 h->top_pred_Y[h->mbx * 2 + 0] = h->pred_mode_Y[7];
359 h->top_pred_Y[h->mbx * 2 + 1] = h->pred_mode_Y[8];
361 /* modify pred modes according to availability of neighbour samples */
362 if (!(h->flags & A_AVAIL)) {
363 modify_pred(left_modifier_l, &h->pred_mode_Y[4]);
364 modify_pred(left_modifier_l, &h->pred_mode_Y[7]);
365 modify_pred(left_modifier_c, pred_mode_uv);
367 if (!(h->flags & B_AVAIL)) {
368 modify_pred(top_modifier_l, &h->pred_mode_Y[4]);
369 modify_pred(top_modifier_l, &h->pred_mode_Y[5]);
370 modify_pred(top_modifier_c, pred_mode_uv);
374 /*****************************************************************************
376 * motion compensation
378 ****************************************************************************/
380 static inline void mc_dir_part(AVSContext *h, AVFrame *pic, int chroma_height,
381 int delta, int list, uint8_t *dest_y,
382 uint8_t *dest_cb, uint8_t *dest_cr,
383 int src_x_offset, int src_y_offset,
384 qpel_mc_func *qpix_op,
385 h264_chroma_mc_func chroma_op, cavs_vector *mv)
387 const int mx = mv->x + src_x_offset * 8;
388 const int my = mv->y + src_y_offset * 8;
389 const int luma_xy = (mx & 3) + ((my & 3) << 2);
390 uint8_t *src_y = pic->data[0] + (mx >> 2) + (my >> 2) * h->l_stride;
391 uint8_t *src_cb = pic->data[1] + (mx >> 3) + (my >> 3) * h->c_stride;
392 uint8_t *src_cr = pic->data[2] + (mx >> 3) + (my >> 3) * h->c_stride;
394 int extra_height = extra_width;
395 const int full_mx = mx >> 2;
396 const int full_my = my >> 2;
397 const int pic_width = 16 * h->mb_width;
398 const int pic_height = 16 * h->mb_height;
408 if (full_mx < 0 - extra_width ||
409 full_my < 0 - extra_height ||
410 full_mx + 16 /* FIXME */ > pic_width + extra_width ||
411 full_my + 16 /* FIXME */ > pic_height + extra_height) {
412 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
413 src_y - 2 - 2 * h->l_stride,
414 h->l_stride, h->l_stride,
415 16 + 5, 16 + 5 /* FIXME */,
416 full_mx - 2, full_my - 2,
417 pic_width, pic_height);
418 src_y = h->edge_emu_buffer + 2 + 2 * h->l_stride;
422 // FIXME try variable height perhaps?
423 qpix_op[luma_xy](dest_y, src_y, h->l_stride);
426 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
427 h->c_stride, h->c_stride,
430 pic_width >> 1, pic_height >> 1);
431 src_cb = h->edge_emu_buffer;
433 chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx & 7, my & 7);
436 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
437 h->c_stride, h->c_stride,
440 pic_width >> 1, pic_height >> 1);
441 src_cr = h->edge_emu_buffer;
443 chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx & 7, my & 7);
446 static inline void mc_part_std(AVSContext *h, int chroma_height, int delta,
450 int x_offset, int y_offset,
451 qpel_mc_func *qpix_put,
452 h264_chroma_mc_func chroma_put,
453 qpel_mc_func *qpix_avg,
454 h264_chroma_mc_func chroma_avg,
457 qpel_mc_func *qpix_op = qpix_put;
458 h264_chroma_mc_func chroma_op = chroma_put;
460 dest_y += x_offset * 2 + y_offset * h->l_stride * 2;
461 dest_cb += x_offset + y_offset * h->c_stride;
462 dest_cr += x_offset + y_offset * h->c_stride;
463 x_offset += 8 * h->mbx;
464 y_offset += 8 * h->mby;
467 AVFrame *ref = h->DPB[mv->ref].f;
468 mc_dir_part(h, ref, chroma_height, delta, 0,
469 dest_y, dest_cb, dest_cr, x_offset, y_offset,
470 qpix_op, chroma_op, mv);
473 chroma_op = chroma_avg;
476 if ((mv + MV_BWD_OFFS)->ref >= 0) {
477 AVFrame *ref = h->DPB[0].f;
478 mc_dir_part(h, ref, chroma_height, delta, 1,
479 dest_y, dest_cb, dest_cr, x_offset, y_offset,
480 qpix_op, chroma_op, mv + MV_BWD_OFFS);
484 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
486 if (ff_cavs_partition_flags[mb_type] == 0) { // 16x16
487 mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,
488 h->cdsp.put_cavs_qpel_pixels_tab[0],
489 h->h264chroma.put_h264_chroma_pixels_tab[0],
490 h->cdsp.avg_cavs_qpel_pixels_tab[0],
491 h->h264chroma.avg_h264_chroma_pixels_tab[0],
494 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,
495 h->cdsp.put_cavs_qpel_pixels_tab[1],
496 h->h264chroma.put_h264_chroma_pixels_tab[1],
497 h->cdsp.avg_cavs_qpel_pixels_tab[1],
498 h->h264chroma.avg_h264_chroma_pixels_tab[1],
500 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,
501 h->cdsp.put_cavs_qpel_pixels_tab[1],
502 h->h264chroma.put_h264_chroma_pixels_tab[1],
503 h->cdsp.avg_cavs_qpel_pixels_tab[1],
504 h->h264chroma.avg_h264_chroma_pixels_tab[1],
506 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,
507 h->cdsp.put_cavs_qpel_pixels_tab[1],
508 h->h264chroma.put_h264_chroma_pixels_tab[1],
509 h->cdsp.avg_cavs_qpel_pixels_tab[1],
510 h->h264chroma.avg_h264_chroma_pixels_tab[1],
512 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,
513 h->cdsp.put_cavs_qpel_pixels_tab[1],
514 h->h264chroma.put_h264_chroma_pixels_tab[1],
515 h->cdsp.avg_cavs_qpel_pixels_tab[1],
516 h->h264chroma.avg_h264_chroma_pixels_tab[1],
521 /*****************************************************************************
523 * motion vector prediction
525 ****************************************************************************/
527 static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,
528 cavs_vector *src, int distp)
530 int den = h->scale_den[src->ref];
532 *d_x = (src->x * distp * den + 256 + FF_SIGNBIT(src->x)) >> 9;
533 *d_y = (src->y * distp * den + 256 + FF_SIGNBIT(src->y)) >> 9;
536 static inline void mv_pred_median(AVSContext *h,
542 int ax, ay, bx, by, cx, cy;
543 int len_ab, len_bc, len_ca, len_mid;
545 /* scale candidates according to their temporal span */
546 scale_mv(h, &ax, &ay, mvA, mvP->dist);
547 scale_mv(h, &bx, &by, mvB, mvP->dist);
548 scale_mv(h, &cx, &cy, mvC, mvP->dist);
549 /* find the geometrical median of the three candidates */
550 len_ab = abs(ax - bx) + abs(ay - by);
551 len_bc = abs(bx - cx) + abs(by - cy);
552 len_ca = abs(cx - ax) + abs(cy - ay);
553 len_mid = mid_pred(len_ab, len_bc, len_ca);
554 if (len_mid == len_ab) {
557 } else if (len_mid == len_bc) {
566 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
567 enum cavs_mv_pred mode, enum cavs_block size, int ref)
569 cavs_vector *mvP = &h->mv[nP];
570 cavs_vector *mvA = &h->mv[nP-1];
571 cavs_vector *mvB = &h->mv[nP-4];
572 cavs_vector *mvC = &h->mv[nC];
573 const cavs_vector *mvP2 = NULL;
576 mvP->dist = h->dist[mvP->ref];
577 if (mvC->ref == NOT_AVAIL)
578 mvC = &h->mv[nP - 5]; // set to top-left (mvD)
579 if (mode == MV_PRED_PSKIP &&
580 (mvA->ref == NOT_AVAIL ||
581 mvB->ref == NOT_AVAIL ||
582 (mvA->x | mvA->y | mvA->ref) == 0 ||
583 (mvB->x | mvB->y | mvB->ref) == 0)) {
585 /* if there is only one suitable candidate, take it */
586 } else if (mvA->ref >= 0 && mvB->ref < 0 && mvC->ref < 0) {
588 } else if (mvA->ref < 0 && mvB->ref >= 0 && mvC->ref < 0) {
590 } else if (mvA->ref < 0 && mvB->ref < 0 && mvC->ref >= 0) {
592 } else if (mode == MV_PRED_LEFT && mvA->ref == ref) {
594 } else if (mode == MV_PRED_TOP && mvB->ref == ref) {
596 } else if (mode == MV_PRED_TOPRIGHT && mvC->ref == ref) {
603 mv_pred_median(h, mvP, mvA, mvB, mvC);
605 if (mode < MV_PRED_PSKIP) {
606 mvP->x += get_se_golomb(&h->bc);
607 mvP->y += get_se_golomb(&h->bc);
612 /*****************************************************************************
616 ****************************************************************************/
619 * initialise predictors for motion vectors and intra prediction
621 void ff_cavs_init_mb(AVSContext *h)
625 /* copy predictors from top line (MB B and C) into cache */
626 for (i = 0; i < 3; i++) {
627 h->mv[MV_FWD_B2 + i] = h->top_mv[0][h->mbx * 2 + i];
628 h->mv[MV_BWD_B2 + i] = h->top_mv[1][h->mbx * 2 + i];
630 h->pred_mode_Y[1] = h->top_pred_Y[h->mbx * 2 + 0];
631 h->pred_mode_Y[2] = h->top_pred_Y[h->mbx * 2 + 1];
632 /* clear top predictors if MB B is not available */
633 if (!(h->flags & B_AVAIL)) {
634 h->mv[MV_FWD_B2] = un_mv;
635 h->mv[MV_FWD_B3] = un_mv;
636 h->mv[MV_BWD_B2] = un_mv;
637 h->mv[MV_BWD_B3] = un_mv;
638 h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
639 h->flags &= ~(C_AVAIL | D_AVAIL);
643 if (h->mbx == h->mb_width - 1) // MB C not available
644 h->flags &= ~C_AVAIL;
645 /* clear top-right predictors if MB C is not available */
646 if (!(h->flags & C_AVAIL)) {
647 h->mv[MV_FWD_C2] = un_mv;
648 h->mv[MV_BWD_C2] = un_mv;
650 /* clear top-left predictors if MB D is not available */
651 if (!(h->flags & D_AVAIL)) {
652 h->mv[MV_FWD_D3] = un_mv;
653 h->mv[MV_BWD_D3] = un_mv;
658 * save predictors for later macroblocks and increase
660 * @return 0 if end of frame is reached, 1 otherwise
662 int ff_cavs_next_mb(AVSContext *h)
670 /* copy mvs as predictors to the left */
671 for (i = 0; i <= 20; i += 4)
672 h->mv[i] = h->mv[i + 2];
673 /* copy bottom mvs from cache to top line */
674 h->top_mv[0][h->mbx * 2 + 0] = h->mv[MV_FWD_X2];
675 h->top_mv[0][h->mbx * 2 + 1] = h->mv[MV_FWD_X3];
676 h->top_mv[1][h->mbx * 2 + 0] = h->mv[MV_BWD_X2];
677 h->top_mv[1][h->mbx * 2 + 1] = h->mv[MV_BWD_X3];
678 /* next MB address */
681 if (h->mbx == h->mb_width) { // New mb line
682 h->flags = B_AVAIL | C_AVAIL;
683 /* clear left pred_modes */
684 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
685 /* clear left mv predictors */
686 for (i = 0; i <= 20; i += 4)
690 /* re-calculate sample pointers */
691 h->cy = h->cur.f->data[0] + h->mby * 16 * h->l_stride;
692 h->cu = h->cur.f->data[1] + h->mby * 8 * h->c_stride;
693 h->cv = h->cur.f->data[2] + h->mby * 8 * h->c_stride;
694 if (h->mby == h->mb_height) { // Frame end
701 /*****************************************************************************
705 ****************************************************************************/
707 void ff_cavs_init_pic(AVSContext *h)
711 /* clear some predictors */
712 for (i = 0; i <= 20; i += 4)
714 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
715 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
716 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
717 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
718 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
719 h->cy = h->cur.f->data[0];
720 h->cu = h->cur.f->data[1];
721 h->cv = h->cur.f->data[2];
722 h->l_stride = h->cur.f->linesize[0];
723 h->c_stride = h->cur.f->linesize[1];
724 h->luma_scan[2] = 8 * h->l_stride;
725 h->luma_scan[3] = 8 * h->l_stride + 8;
726 h->mbx = h->mby = h->mbidx = 0;
730 /*****************************************************************************
732 * headers and interface
734 ****************************************************************************/
737 * some predictions require data from the top-neighbouring macroblock.
738 * this data has to be stored for one complete row of macroblocks
739 * and this storage space is allocated here
741 void ff_cavs_init_top_lines(AVSContext *h)
743 /* alloc top line of predictors */
744 h->top_qp = av_mallocz(h->mb_width);
745 h->top_mv[0] = av_mallocz((h->mb_width * 2 + 1) * sizeof(cavs_vector));
746 h->top_mv[1] = av_mallocz((h->mb_width * 2 + 1) * sizeof(cavs_vector));
747 h->top_pred_Y = av_mallocz(h->mb_width * 2 * sizeof(*h->top_pred_Y));
748 h->top_border_y = av_mallocz((h->mb_width + 1) * 16);
749 h->top_border_u = av_mallocz(h->mb_width * 10);
750 h->top_border_v = av_mallocz(h->mb_width * 10);
752 /* alloc space for co-located MVs and types */
753 h->col_mv = av_mallocz(h->mb_width * h->mb_height * 4 *
754 sizeof(cavs_vector));
755 h->col_type_base = av_mallocz(h->mb_width * h->mb_height);
756 h->block = av_mallocz(64 * sizeof(int16_t));
759 av_cold int ff_cavs_init(AVCodecContext *avctx)
761 AVSContext *h = avctx->priv_data;
763 ff_blockdsp_init(&h->bdsp, avctx);
764 ff_h264chroma_init(&h->h264chroma, 8);
765 ff_idctdsp_init(&h->idsp, avctx);
766 ff_videodsp_init(&h->vdsp, 8);
767 ff_cavsdsp_init(&h->cdsp, avctx);
768 ff_init_scantable_permutation(h->idsp.idct_permutation,
770 ff_init_scantable(h->idsp.idct_permutation, &h->scantable, ff_zigzag_direct);
773 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
775 h->cur.f = av_frame_alloc();
776 h->DPB[0].f = av_frame_alloc();
777 h->DPB[1].f = av_frame_alloc();
778 if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {
780 return AVERROR(ENOMEM);
785 h->intra_pred_l[INTRA_L_VERT] = intra_pred_vert;
786 h->intra_pred_l[INTRA_L_HORIZ] = intra_pred_horiz;
787 h->intra_pred_l[INTRA_L_LP] = intra_pred_lp;
788 h->intra_pred_l[INTRA_L_DOWN_LEFT] = intra_pred_down_left;
789 h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
790 h->intra_pred_l[INTRA_L_LP_LEFT] = intra_pred_lp_left;
791 h->intra_pred_l[INTRA_L_LP_TOP] = intra_pred_lp_top;
792 h->intra_pred_l[INTRA_L_DC_128] = intra_pred_dc_128;
793 h->intra_pred_c[INTRA_C_LP] = intra_pred_lp;
794 h->intra_pred_c[INTRA_C_HORIZ] = intra_pred_horiz;
795 h->intra_pred_c[INTRA_C_VERT] = intra_pred_vert;
796 h->intra_pred_c[INTRA_C_PLANE] = intra_pred_plane;
797 h->intra_pred_c[INTRA_C_LP_LEFT] = intra_pred_lp_left;
798 h->intra_pred_c[INTRA_C_LP_TOP] = intra_pred_lp_top;
799 h->intra_pred_c[INTRA_C_DC_128] = intra_pred_dc_128;
805 av_cold int ff_cavs_end(AVCodecContext *avctx)
807 AVSContext *h = avctx->priv_data;
809 av_frame_free(&h->cur.f);
810 av_frame_free(&h->DPB[0].f);
811 av_frame_free(&h->DPB[1].f);
814 av_free(h->top_mv[0]);
815 av_free(h->top_mv[1]);
816 av_free(h->top_pred_Y);
817 av_free(h->top_border_y);
818 av_free(h->top_border_u);
819 av_free(h->top_border_v);
821 av_free(h->col_type_base);
823 av_freep(&h->edge_emu_buffer);