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"
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
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
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
56 /** mark block as unavailable, i.e. out of picture
57 * or not yet decoded */
58 static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL };
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 };
65 /*****************************************************************************
67 * in-loop deblocking filter
69 ****************************************************************************/
71 static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b)
73 if ((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
75 if ((abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4))
80 if ((abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4))
83 if (mvP->ref != mvQ->ref)
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)];
95 * in-loop deblocking filter for a single macroblock
97 * boundary strength (bs) mapping:
106 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
109 int qp_avg, alpha, beta, tc;
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);
125 if (!h->loop_filter_disable) {
127 if (mb_type == I_8X8)
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);
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);
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);
145 if (h->flags & A_AVAIL) {
146 qp_avg = (h->qp + h->left_qp + 1) >> 1;
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]);
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]);
157 if (h->flags & B_AVAIL) {
158 qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
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]);
167 h->top_qp[h->mbx] = h->qp;
172 /*****************************************************************************
174 * spatial intra prediction
176 ****************************************************************************/
178 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,
179 uint8_t **left, int block)
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);
191 if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
192 h->left_border_y[0] = top[0] = h->topleft_border_y;
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);
204 memset(&top[9], top[8], 9);
207 if (h->flags & B_AVAIL)
208 h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];
211 *left = &h->left_border_y[8];
212 memcpy(&top[1], h->cy + 7 * h->l_stride, 16);
215 if (h->flags & A_AVAIL)
216 top[0] = h->left_border_y[8];
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);
229 void ff_cavs_load_intra_pred_chroma(AVSContext *h)
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;
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];
247 static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
250 uint64_t a = AV_RN64(&top[1]);
251 for (y = 0; y < 8; y++)
252 *((uint64_t *)(d + y * stride)) = a;
255 static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
259 for (y = 0; y < 8; y++) {
260 a = left[y + 1] * 0x0101010101010101ULL;
261 *((uint64_t *)(d + y * stride)) = a;
265 static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
268 uint64_t a = 0x8080808080808080ULL;
269 for (y = 0; y < 8; y++)
270 *((uint64_t *)(d + y * stride)) = a;
273 static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
278 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
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]);
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];
292 #define LOWPASS(ARRAY, INDEX) \
293 ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)
295 static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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;
303 static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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;
311 static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
314 for (y = 0; y < 8; y++)
315 for (x = 0; x < 8; x++)
317 d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;
319 d[y * stride + x] = LOWPASS(top, x - y);
321 d[y * stride + x] = LOWPASS(left, y - x);
324 static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
327 for (y = 0; y < 8; y++)
328 for (x = 0; x < 8; x++)
329 d[y * stride + x] = LOWPASS(left, y + 1);
332 static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
335 for (y = 0; y < 8; y++)
336 for (x = 0; x < 8; x++)
337 d[y * stride + x] = LOWPASS(top, x + 1);
342 static inline void modify_pred(const int8_t *mod_table, int *mode)
344 *mode = mod_table[*mode];
346 av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
351 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
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];
359 /* modify pred modes according to availability of neighbour samples */
360 if (!(h->flags & A_AVAIL)) {
361 modify_pred(left_modifier_l, &h->pred_mode_Y[4]);
362 modify_pred(left_modifier_l, &h->pred_mode_Y[7]);
363 modify_pred(left_modifier_c, pred_mode_uv);
365 if (!(h->flags & B_AVAIL)) {
366 modify_pred(top_modifier_l, &h->pred_mode_Y[4]);
367 modify_pred(top_modifier_l, &h->pred_mode_Y[5]);
368 modify_pred(top_modifier_c, pred_mode_uv);
372 /*****************************************************************************
374 * motion compensation
376 ****************************************************************************/
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)
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;
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;
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) {
410 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
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;
420 // FIXME try variable height perhaps?
421 qpix_op[luma_xy](dest_y, src_y, h->l_stride);
424 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
425 h->c_stride, h->c_stride,
428 pic_width >> 1, pic_height >> 1);
429 src_cb = h->edge_emu_buffer;
431 chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx & 7, my & 7);
434 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
435 h->c_stride, h->c_stride,
438 pic_width >> 1, pic_height >> 1);
439 src_cr = h->edge_emu_buffer;
441 chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx & 7, my & 7);
444 static inline void mc_part_std(AVSContext *h, int chroma_height, int delta,
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,
455 qpel_mc_func *qpix_op = qpix_put;
456 h264_chroma_mc_func chroma_op = chroma_put;
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;
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);
471 chroma_op = chroma_avg;
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);
482 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
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,
486 h->cdsp.put_cavs_qpel_pixels_tab[0],
487 h->h264chroma.put_h264_chroma_pixels_tab[0],
488 h->cdsp.avg_cavs_qpel_pixels_tab[0],
489 h->h264chroma.avg_h264_chroma_pixels_tab[0],
492 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,
493 h->cdsp.put_cavs_qpel_pixels_tab[1],
494 h->h264chroma.put_h264_chroma_pixels_tab[1],
495 h->cdsp.avg_cavs_qpel_pixels_tab[1],
496 h->h264chroma.avg_h264_chroma_pixels_tab[1],
498 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,
499 h->cdsp.put_cavs_qpel_pixels_tab[1],
500 h->h264chroma.put_h264_chroma_pixels_tab[1],
501 h->cdsp.avg_cavs_qpel_pixels_tab[1],
502 h->h264chroma.avg_h264_chroma_pixels_tab[1],
504 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,
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, 4,
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],
519 /*****************************************************************************
521 * motion vector prediction
523 ****************************************************************************/
525 static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,
526 cavs_vector *src, int distp)
528 int den = h->scale_den[FFMAX(src->ref, 0)];
530 *d_x = (src->x * distp * den + 256 + (src->x >> 31)) >> 9;
531 *d_y = (src->y * distp * den + 256 + (src->y >> 31)) >> 9;
534 static inline void mv_pred_median(AVSContext *h,
540 int ax, ay, bx, by, cx, cy;
541 int len_ab, len_bc, len_ca, len_mid;
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) {
555 } else if (len_mid == len_bc) {
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)
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;
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)) {
583 /* if there is only one suitable candidate, take it */
584 } else if (mvA->ref >= 0 && mvB->ref < 0 && mvC->ref < 0) {
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 (mode == MV_PRED_LEFT && mvA->ref == ref) {
592 } else if (mode == MV_PRED_TOP && mvB->ref == ref) {
594 } else if (mode == MV_PRED_TOPRIGHT && mvC->ref == ref) {
601 mv_pred_median(h, mvP, mvA, mvB, mvC);
603 if (mode < MV_PRED_PSKIP) {
604 mvP->x += get_se_golomb(&h->gb);
605 mvP->y += get_se_golomb(&h->gb);
610 /*****************************************************************************
614 ****************************************************************************/
617 * initialise predictors for motion vectors and intra prediction
619 void ff_cavs_init_mb(AVSContext *h)
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];
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);
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;
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;
656 * save predictors for later macroblocks and increase
658 * @return 0 if end of frame is reached, 1 otherwise
660 int ff_cavs_next_mb(AVSContext *h)
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 */
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)
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
699 /*****************************************************************************
703 ****************************************************************************/
705 int ff_cavs_init_pic(AVSContext *h)
709 /* clear some predictors */
710 for (i = 0; i <= 20; i += 4)
712 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
713 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
714 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
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;
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_dsputil_init(&h->dsp, avctx);
764 ff_h264chroma_init(&h->h264chroma, 8);
765 ff_videodsp_init(&h->vdsp, 8);
766 ff_cavsdsp_init(&h->cdsp, avctx);
767 ff_init_scantable_permutation(h->dsp.idct_permutation,
769 ff_init_scantable(h->dsp.idct_permutation, &h->scantable, ff_zigzag_direct);
772 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
774 h->cur.f = av_frame_alloc();
775 h->DPB[0].f = av_frame_alloc();
776 h->DPB[1].f = av_frame_alloc();
777 if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {
779 return AVERROR(ENOMEM);
784 h->intra_pred_l[INTRA_L_VERT] = intra_pred_vert;
785 h->intra_pred_l[INTRA_L_HORIZ] = intra_pred_horiz;
786 h->intra_pred_l[INTRA_L_LP] = intra_pred_lp;
787 h->intra_pred_l[INTRA_L_DOWN_LEFT] = intra_pred_down_left;
788 h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
789 h->intra_pred_l[INTRA_L_LP_LEFT] = intra_pred_lp_left;
790 h->intra_pred_l[INTRA_L_LP_TOP] = intra_pred_lp_top;
791 h->intra_pred_l[INTRA_L_DC_128] = intra_pred_dc_128;
792 h->intra_pred_c[INTRA_C_LP] = intra_pred_lp;
793 h->intra_pred_c[INTRA_C_HORIZ] = intra_pred_horiz;
794 h->intra_pred_c[INTRA_C_VERT] = intra_pred_vert;
795 h->intra_pred_c[INTRA_C_PLANE] = intra_pred_plane;
796 h->intra_pred_c[INTRA_C_LP_LEFT] = intra_pred_lp_left;
797 h->intra_pred_c[INTRA_C_LP_TOP] = intra_pred_lp_top;
798 h->intra_pred_c[INTRA_C_DC_128] = intra_pred_dc_128;
804 av_cold int ff_cavs_end(AVCodecContext *avctx)
806 AVSContext *h = avctx->priv_data;
808 av_frame_free(&h->cur.f);
809 av_frame_free(&h->DPB[0].f);
810 av_frame_free(&h->DPB[1].f);
813 av_free(h->top_mv[0]);
814 av_free(h->top_mv[1]);
815 av_free(h->top_pred_Y);
816 av_free(h->top_border_y);
817 av_free(h->top_border_u);
818 av_free(h->top_border_v);
820 av_free(h->col_type_base);
822 av_freep(&h->edge_emu_buffer);