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
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;
256 static void intra_pred_horiz(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
260 for (y = 0; y < 8; y++) {
261 a = left[y + 1] * 0x0101010101010101ULL;
262 *((uint64_t *)(d + y * stride)) = a;
266 static void intra_pred_dc_128(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
269 uint64_t a = 0x8080808080808080ULL;
270 for (y = 0; y < 8; y++)
271 *((uint64_t *)(d + y * stride)) = a;
274 static void intra_pred_plane(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
279 const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
281 for (x = 0; x < 4; x++) {
282 ih += (x + 1) * (top [5 + x] - top [3 - x]);
283 iv += (x + 1) * (left[5 + x] - left[3 - x]);
285 ia = (top[8] + left[8]) << 4;
286 ih = (17 * ih + 16) >> 5;
287 iv = (17 * iv + 16) >> 5;
288 for (y = 0; y < 8; y++)
289 for (x = 0; x < 8; x++)
290 d[y * stride + x] = cm[(ia + (x - 3) * ih + (y - 3) * iv + 16) >> 5];
293 #define LOWPASS(ARRAY,INDEX) \
294 ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)
296 static void intra_pred_lp(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
299 for (y = 0; y < 8; y++)
300 for (x = 0; x < 8; x++)
301 d[y * stride + x] = (LOWPASS(top, x + 1) + LOWPASS(left, y + 1)) >> 1;
304 static void intra_pred_down_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
307 for (y = 0; y < 8; y++)
308 for (x = 0; x < 8; x++)
309 d[y * stride + x] = (LOWPASS(top, x + y + 2) + LOWPASS(left, x + y + 2)) >> 1;
312 static void intra_pred_down_right(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
315 for (y = 0; y < 8; y++)
316 for (x = 0; x < 8; x++)
318 d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;
320 d[y * stride + x] = LOWPASS(top, x - y);
322 d[y * stride + x] = LOWPASS(left, y - x);
325 static void intra_pred_lp_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
328 for (y = 0; y < 8; y++)
329 for (x = 0; x < 8; x++)
330 d[y * stride + x] = LOWPASS(left, y + 1);
333 static void intra_pred_lp_top(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
336 for (y = 0; y < 8; y++)
337 for (x = 0; x < 8; x++)
338 d[y * stride + x] = LOWPASS(top, x + 1);
343 static inline void modify_pred(const int8_t *mod_table, int *mode)
345 *mode = mod_table[*mode];
347 av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
352 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
354 /* save pred modes before they get modified */
355 h->pred_mode_Y[3] = h->pred_mode_Y[5];
356 h->pred_mode_Y[6] = h->pred_mode_Y[8];
357 h->top_pred_Y[h->mbx * 2 + 0] = h->pred_mode_Y[7];
358 h->top_pred_Y[h->mbx * 2 + 1] = h->pred_mode_Y[8];
360 /* modify pred modes according to availability of neighbour samples */
361 if (!(h->flags & A_AVAIL)) {
362 modify_pred(left_modifier_l, &h->pred_mode_Y[4]);
363 modify_pred(left_modifier_l, &h->pred_mode_Y[7]);
364 modify_pred(left_modifier_c, pred_mode_uv);
366 if (!(h->flags & B_AVAIL)) {
367 modify_pred(top_modifier_l, &h->pred_mode_Y[4]);
368 modify_pred(top_modifier_l, &h->pred_mode_Y[5]);
369 modify_pred(top_modifier_c, pred_mode_uv);
373 /*****************************************************************************
375 * motion compensation
377 ****************************************************************************/
379 static inline void mc_dir_part(AVSContext *h, AVFrame *pic,
380 int chroma_height,int delta,int list,uint8_t *dest_y,
381 uint8_t *dest_cb,uint8_t *dest_cr,int src_x_offset,
382 int src_y_offset,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;
394 const int full_mx= mx>>2;
395 const int full_my= my>>2;
396 const int pic_width = 16*h->mb_width;
397 const int pic_height = 16*h->mb_height;
401 if(mx&7) extra_width -= 3;
402 if(my&7) extra_height -= 3;
404 if( full_mx < 0-extra_width
405 || full_my < 0-extra_height
406 || full_mx + 16/*FIXME*/ > pic_width + extra_width
407 || full_my + 16/*FIXME*/ > pic_height + extra_height){
408 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, h->l_stride,
409 src_y - 2 - 2*h->l_stride, h->l_stride,
410 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
411 src_y= h->edge_emu_buffer + 2 + 2*h->l_stride;
415 qpix_op[luma_xy](dest_y, src_y, h->l_stride); //FIXME try variable height perhaps?
418 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, h->c_stride, src_cb, h->c_stride,
419 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
420 src_cb= h->edge_emu_buffer;
422 chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx&7, my&7);
425 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, h->c_stride, src_cr, h->c_stride,
426 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
427 src_cr= h->edge_emu_buffer;
429 chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx&7, my&7);
432 static inline void mc_part_std(AVSContext *h,int chroma_height,int delta,
433 uint8_t *dest_y,uint8_t *dest_cb,uint8_t *dest_cr,
434 int x_offset, int y_offset,qpel_mc_func *qpix_put,
435 h264_chroma_mc_func chroma_put,qpel_mc_func *qpix_avg,
436 h264_chroma_mc_func chroma_avg, cavs_vector *mv)
438 qpel_mc_func *qpix_op= qpix_put;
439 h264_chroma_mc_func chroma_op= chroma_put;
441 dest_y += 2*x_offset + 2*y_offset*h->l_stride;
442 dest_cb += x_offset + y_offset*h->c_stride;
443 dest_cr += x_offset + y_offset*h->c_stride;
444 x_offset += 8*h->mbx;
445 y_offset += 8*h->mby;
448 AVFrame *ref = h->DPB[mv->ref].f;
449 mc_dir_part(h, ref, chroma_height, delta, 0,
450 dest_y, dest_cb, dest_cr, x_offset, y_offset,
451 qpix_op, chroma_op, mv);
454 chroma_op= chroma_avg;
457 if((mv+MV_BWD_OFFS)->ref >= 0){
458 AVFrame *ref = h->DPB[0].f;
459 mc_dir_part(h, ref, chroma_height, delta, 1,
460 dest_y, dest_cb, dest_cr, x_offset, y_offset,
461 qpix_op, chroma_op, mv+MV_BWD_OFFS);
465 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type) {
466 if(ff_cavs_partition_flags[mb_type] == 0){ // 16x16
467 mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,
468 h->cdsp.put_cavs_qpel_pixels_tab[0],
469 h->h264chroma.put_h264_chroma_pixels_tab[0],
470 h->cdsp.avg_cavs_qpel_pixels_tab[0],
471 h->h264chroma.avg_h264_chroma_pixels_tab[0],
474 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,
475 h->cdsp.put_cavs_qpel_pixels_tab[1],
476 h->h264chroma.put_h264_chroma_pixels_tab[1],
477 h->cdsp.avg_cavs_qpel_pixels_tab[1],
478 h->h264chroma.avg_h264_chroma_pixels_tab[1],
480 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,
481 h->cdsp.put_cavs_qpel_pixels_tab[1],
482 h->h264chroma.put_h264_chroma_pixels_tab[1],
483 h->cdsp.avg_cavs_qpel_pixels_tab[1],
484 h->h264chroma.avg_h264_chroma_pixels_tab[1],
486 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,
487 h->cdsp.put_cavs_qpel_pixels_tab[1],
488 h->h264chroma.put_h264_chroma_pixels_tab[1],
489 h->cdsp.avg_cavs_qpel_pixels_tab[1],
490 h->h264chroma.avg_h264_chroma_pixels_tab[1],
492 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,
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],
501 /*****************************************************************************
503 * motion vector prediction
505 ****************************************************************************/
507 static inline void scale_mv(AVSContext *h, int *d_x, int *d_y, cavs_vector *src, int distp) {
508 int den = h->scale_den[src->ref];
510 *d_x = (src->x*distp*den + 256 + (src->x>>31)) >> 9;
511 *d_y = (src->y*distp*den + 256 + (src->y>>31)) >> 9;
514 static inline void mv_pred_median(AVSContext *h, cavs_vector *mvP,
515 cavs_vector *mvA, cavs_vector *mvB, cavs_vector *mvC) {
516 int ax, ay, bx, by, cx, cy;
517 int len_ab, len_bc, len_ca, len_mid;
519 /* scale candidates according to their temporal span */
520 scale_mv(h, &ax, &ay, mvA, mvP->dist);
521 scale_mv(h, &bx, &by, mvB, mvP->dist);
522 scale_mv(h, &cx, &cy, mvC, mvP->dist);
523 /* find the geometrical median of the three candidates */
524 len_ab = abs(ax - bx) + abs(ay - by);
525 len_bc = abs(bx - cx) + abs(by - cy);
526 len_ca = abs(cx - ax) + abs(cy - ay);
527 len_mid = mid_pred(len_ab, len_bc, len_ca);
528 if(len_mid == len_ab) {
531 } else if(len_mid == len_bc) {
540 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
541 enum cavs_mv_pred mode, enum cavs_block size, int ref) {
542 cavs_vector *mvP = &h->mv[nP];
543 cavs_vector *mvA = &h->mv[nP-1];
544 cavs_vector *mvB = &h->mv[nP-4];
545 cavs_vector *mvC = &h->mv[nC];
546 const cavs_vector *mvP2 = NULL;
549 mvP->dist = h->dist[mvP->ref];
550 if(mvC->ref == NOT_AVAIL)
551 mvC = &h->mv[nP-5]; // set to top-left (mvD)
552 if((mode == MV_PRED_PSKIP) &&
553 ((mvA->ref == NOT_AVAIL) || (mvB->ref == NOT_AVAIL) ||
554 ((mvA->x | mvA->y | mvA->ref) == 0) ||
555 ((mvB->x | mvB->y | mvB->ref) == 0) )) {
557 /* if there is only one suitable candidate, take it */
558 } else if((mvA->ref >= 0) && (mvB->ref < 0) && (mvC->ref < 0)) {
560 } else if((mvA->ref < 0) && (mvB->ref >= 0) && (mvC->ref < 0)) {
562 } else if((mvA->ref < 0) && (mvB->ref < 0) && (mvC->ref >= 0)) {
564 } else if(mode == MV_PRED_LEFT && mvA->ref == ref){
566 } else if(mode == MV_PRED_TOP && mvB->ref == ref){
568 } else if(mode == MV_PRED_TOPRIGHT && mvC->ref == ref){
575 mv_pred_median(h, mvP, mvA, mvB, mvC);
577 if(mode < MV_PRED_PSKIP) {
578 mvP->x += get_se_golomb(&h->gb);
579 mvP->y += get_se_golomb(&h->gb);
584 /*****************************************************************************
588 ****************************************************************************/
591 * initialise predictors for motion vectors and intra prediction
593 void ff_cavs_init_mb(AVSContext *h) {
596 /* copy predictors from top line (MB B and C) into cache */
598 h->mv[MV_FWD_B2+i] = h->top_mv[0][h->mbx*2+i];
599 h->mv[MV_BWD_B2+i] = h->top_mv[1][h->mbx*2+i];
601 h->pred_mode_Y[1] = h->top_pred_Y[h->mbx*2+0];
602 h->pred_mode_Y[2] = h->top_pred_Y[h->mbx*2+1];
603 /* clear top predictors if MB B is not available */
604 if(!(h->flags & B_AVAIL)) {
605 h->mv[MV_FWD_B2] = un_mv;
606 h->mv[MV_FWD_B3] = un_mv;
607 h->mv[MV_BWD_B2] = un_mv;
608 h->mv[MV_BWD_B3] = un_mv;
609 h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
610 h->flags &= ~(C_AVAIL|D_AVAIL);
614 if(h->mbx == h->mb_width-1) //MB C not available
615 h->flags &= ~C_AVAIL;
616 /* clear top-right predictors if MB C is not available */
617 if(!(h->flags & C_AVAIL)) {
618 h->mv[MV_FWD_C2] = un_mv;
619 h->mv[MV_BWD_C2] = un_mv;
621 /* clear top-left predictors if MB D is not available */
622 if(!(h->flags & D_AVAIL)) {
623 h->mv[MV_FWD_D3] = un_mv;
624 h->mv[MV_BWD_D3] = un_mv;
629 * save predictors for later macroblocks and increase
631 * @return 0 if end of frame is reached, 1 otherwise
633 int ff_cavs_next_mb(AVSContext *h) {
640 /* copy mvs as predictors to the left */
642 h->mv[i] = h->mv[i+2];
643 /* copy bottom mvs from cache to top line */
644 h->top_mv[0][h->mbx*2+0] = h->mv[MV_FWD_X2];
645 h->top_mv[0][h->mbx*2+1] = h->mv[MV_FWD_X3];
646 h->top_mv[1][h->mbx*2+0] = h->mv[MV_BWD_X2];
647 h->top_mv[1][h->mbx*2+1] = h->mv[MV_BWD_X3];
648 /* next MB address */
651 if(h->mbx == h->mb_width) { //new mb line
652 h->flags = B_AVAIL|C_AVAIL;
653 /* clear left pred_modes */
654 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
655 /* clear left mv predictors */
660 /* re-calculate sample pointers */
661 h->cy = h->cur.f->data[0] + h->mby * 16 * h->l_stride;
662 h->cu = h->cur.f->data[1] + h->mby * 8 * h->c_stride;
663 h->cv = h->cur.f->data[2] + h->mby * 8 * h->c_stride;
664 if(h->mby == h->mb_height) { //frame end
671 /*****************************************************************************
675 ****************************************************************************/
677 int ff_cavs_init_pic(AVSContext *h) {
680 /* clear some predictors */
683 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
684 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
685 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
686 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
687 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
688 h->cy = h->cur.f->data[0];
689 h->cu = h->cur.f->data[1];
690 h->cv = h->cur.f->data[2];
691 h->l_stride = h->cur.f->linesize[0];
692 h->c_stride = h->cur.f->linesize[1];
693 h->luma_scan[2] = 8*h->l_stride;
694 h->luma_scan[3] = 8*h->l_stride+8;
695 h->mbx = h->mby = h->mbidx = 0;
701 /*****************************************************************************
703 * headers and interface
705 ****************************************************************************/
708 * some predictions require data from the top-neighbouring macroblock.
709 * this data has to be stored for one complete row of macroblocks
710 * and this storage space is allocated here
712 void ff_cavs_init_top_lines(AVSContext *h) {
713 /* alloc top line of predictors */
714 h->top_qp = av_mallocz( h->mb_width);
715 h->top_mv[0] = av_mallocz((h->mb_width*2+1)*sizeof(cavs_vector));
716 h->top_mv[1] = av_mallocz((h->mb_width*2+1)*sizeof(cavs_vector));
717 h->top_pred_Y = av_mallocz( h->mb_width*2*sizeof(*h->top_pred_Y));
718 h->top_border_y = av_mallocz((h->mb_width+1)*16);
719 h->top_border_u = av_mallocz( h->mb_width * 10);
720 h->top_border_v = av_mallocz( h->mb_width * 10);
722 /* alloc space for co-located MVs and types */
723 h->col_mv = av_mallocz( h->mb_width*h->mb_height*4*sizeof(cavs_vector));
724 h->col_type_base = av_mallocz(h->mb_width*h->mb_height);
725 h->block = av_mallocz(64*sizeof(int16_t));
728 av_cold int ff_cavs_init(AVCodecContext *avctx) {
729 AVSContext *h = avctx->priv_data;
731 ff_dsputil_init(&h->dsp, avctx);
732 ff_h264chroma_init(&h->h264chroma, 8);
733 ff_videodsp_init(&h->vdsp, 8);
734 ff_cavsdsp_init(&h->cdsp, avctx);
735 ff_init_scantable_permutation(h->dsp.idct_permutation,
737 ff_init_scantable(h->dsp.idct_permutation, &h->scantable, ff_zigzag_direct);
740 avctx->pix_fmt= AV_PIX_FMT_YUV420P;
742 h->cur.f = av_frame_alloc();
743 h->DPB[0].f = av_frame_alloc();
744 h->DPB[1].f = av_frame_alloc();
745 if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {
747 return AVERROR(ENOMEM);
752 h->intra_pred_l[ INTRA_L_VERT] = intra_pred_vert;
753 h->intra_pred_l[ INTRA_L_HORIZ] = intra_pred_horiz;
754 h->intra_pred_l[ INTRA_L_LP] = intra_pred_lp;
755 h->intra_pred_l[ INTRA_L_DOWN_LEFT] = intra_pred_down_left;
756 h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
757 h->intra_pred_l[ INTRA_L_LP_LEFT] = intra_pred_lp_left;
758 h->intra_pred_l[ INTRA_L_LP_TOP] = intra_pred_lp_top;
759 h->intra_pred_l[ INTRA_L_DC_128] = intra_pred_dc_128;
760 h->intra_pred_c[ INTRA_C_LP] = intra_pred_lp;
761 h->intra_pred_c[ INTRA_C_HORIZ] = intra_pred_horiz;
762 h->intra_pred_c[ INTRA_C_VERT] = intra_pred_vert;
763 h->intra_pred_c[ INTRA_C_PLANE] = intra_pred_plane;
764 h->intra_pred_c[ INTRA_C_LP_LEFT] = intra_pred_lp_left;
765 h->intra_pred_c[ INTRA_C_LP_TOP] = intra_pred_lp_top;
766 h->intra_pred_c[ INTRA_C_DC_128] = intra_pred_dc_128;
772 av_cold int ff_cavs_end(AVCodecContext *avctx) {
773 AVSContext *h = avctx->priv_data;
775 av_frame_free(&h->cur.f);
776 av_frame_free(&h->DPB[0].f);
777 av_frame_free(&h->DPB[1].f);
780 av_free(h->top_mv[0]);
781 av_free(h->top_mv[1]);
782 av_free(h->top_pred_Y);
783 av_free(h->top_border_y);
784 av_free(h->top_border_u);
785 av_free(h->top_border_v);
787 av_free(h->col_type_base);
789 av_freep(&h->edge_emu_buffer);