1 /*
2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 /**
23 * @file
24 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
25 * @author Stefan Gehrer <stefan.gehrer@gmx.de>
26 */
27
28 #include "avcodec.h"
29 #include "get_bits.h"
30 #include "golomb.h"
31 #include "h264chroma.h"
32 #include "idctdsp.h"
33 #include "internal.h"
34 #include "mathops.h"
35 #include "qpeldsp.h"
36 #include "cavs.h"
37
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
43 };
44
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
50 };
51
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
57 };
58
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 };
62
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 };
67
68 /*****************************************************************************
69 *
70 * in-loop deblocking filter
71 *
72 ****************************************************************************/
73
get_bs(cavs_vector * mvP,cavs_vector * mvQ,int b)74 static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b)
75 {
76 if ((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
77 return 2;
78 if((abs(mvP->x - mvQ->x) >= 4) ||
79 (abs(mvP->y - mvQ->y) >= 4) ||
80 (mvP->ref != mvQ->ref))
81 return 1;
82 if (b) {
83 mvP += MV_BWD_OFFS;
84 mvQ += MV_BWD_OFFS;
85 if((abs(mvP->x - mvQ->x) >= 4) ||
86 (abs(mvP->y - mvQ->y) >= 4) ||
87 (mvP->ref != mvQ->ref))
88 return 1;
89 }
90 return 0;
91 }
92
93 #define SET_PARAMS \
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)];
97
98 /**
99 * in-loop deblocking filter for a single macroblock
100 *
101 * boundary strength (bs) mapping:
102 *
103 * --4---5--
104 * 0 2 |
105 * | 6 | 7 |
106 * 1 3 |
107 * ---------
108 */
ff_cavs_filter(AVSContext * h,enum cavs_mb mb_type)109 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
110 {
111 uint8_t bs[8];
112 int qp_avg, alpha, beta, tc;
113 int i;
114
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);
127 }
128 if (!h->loop_filter_disable) {
129 /* determine bs */
130 if (mb_type == I_8X8)
131 memset(bs, 2, 8);
132 else {
133 memset(bs, 0, 8);
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);
137 }
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);
141 }
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);
146 }
147 if (AV_RN64(bs)) {
148 if (h->flags & A_AVAIL) {
149 qp_avg = (h->qp + h->left_qp + 1) >> 1;
150 SET_PARAMS;
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;
153 SET_PARAMS;
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]);
156 }
157 qp_avg = h->qp;
158 SET_PARAMS;
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]);
161
162 if (h->flags & B_AVAIL) {
163 qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
164 SET_PARAMS;
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;
167 SET_PARAMS;
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]);
170 }
171 }
172 }
173 h->left_qp = h->qp;
174 h->top_qp[h->mbx] = h->qp;
175 }
176
177 #undef SET_PARAMS
178
179 /*****************************************************************************
180 *
181 * spatial intra prediction
182 *
183 ****************************************************************************/
184
ff_cavs_load_intra_pred_luma(AVSContext * h,uint8_t * top,uint8_t ** left,int block)185 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,
186 uint8_t **left, int block)
187 {
188 int i;
189
190 switch (block) {
191 case 0:
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);
196 top[17] = top[16];
197 top[0] = top[1];
198 if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
199 h->left_border_y[0] = top[0] = h->topleft_border_y;
200 break;
201 case 1:
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);
210 else
211 memset(&top[9], top[8], 9);
212 top[17] = top[16];
213 top[0] = top[1];
214 if (h->flags & B_AVAIL)
215 h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];
216 break;
217 case 2:
218 *left = &h->left_border_y[8];
219 memcpy(&top[1], h->cy + 7 * h->l_stride, 16);
220 top[17] = top[16];
221 top[0] = top[1];
222 if (h->flags & A_AVAIL)
223 top[0] = h->left_border_y[8];
224 break;
225 case 3:
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);
232 break;
233 }
234 }
235
ff_cavs_load_intra_pred_chroma(AVSContext * h)236 void ff_cavs_load_intra_pred_chroma(AVSContext *h)
237 {
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];
244 } else {
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];
247 }
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;
251 } else {
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];
256 }
257 }
258
intra_pred_vert(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)259 static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
260 {
261 int y;
262 uint64_t a = AV_RN64(&top[1]);
263 for (y = 0; y < 8; y++)
264 *((uint64_t *)(d + y * stride)) = a;
265 }
266
intra_pred_horiz(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)267 static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
268 {
269 int y;
270 uint64_t a;
271 for (y = 0; y < 8; y++) {
272 a = left[y + 1] * 0x0101010101010101ULL;
273 *((uint64_t *)(d + y * stride)) = a;
274 }
275 }
276
intra_pred_dc_128(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)277 static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
278 {
279 int y;
280 uint64_t a = 0x8080808080808080ULL;
281 for (y = 0; y < 8; y++)
282 *((uint64_t *)(d + y * stride)) = a;
283 }
284
intra_pred_plane(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)285 static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
286 {
287 int x, y, ia;
288 int ih = 0;
289 int iv = 0;
290 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
291
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]);
295 }
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];
302 }
303
304 #define LOWPASS(ARRAY, INDEX) \
305 ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)
306
intra_pred_lp(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)307 static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
308 {
309 int x, y;
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;
313 }
314
intra_pred_down_left(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)315 static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
316 {
317 int x, y;
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;
321 }
322
intra_pred_down_right(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)323 static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
324 {
325 int x, y;
326 for (y = 0; y < 8; y++)
327 for (x = 0; x < 8; x++)
328 if (x == y)
329 d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;
330 else if (x > y)
331 d[y * stride + x] = LOWPASS(top, x - y);
332 else
333 d[y * stride + x] = LOWPASS(left, y - x);
334 }
335
intra_pred_lp_left(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)336 static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
337 {
338 int x, y;
339 for (y = 0; y < 8; y++)
340 for (x = 0; x < 8; x++)
341 d[y * stride + x] = LOWPASS(left, y + 1);
342 }
343
intra_pred_lp_top(uint8_t * d,uint8_t * top,uint8_t * left,ptrdiff_t stride)344 static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride)
345 {
346 int x, y;
347 for (y = 0; y < 8; y++)
348 for (x = 0; x < 8; x++)
349 d[y * stride + x] = LOWPASS(top, x + 1);
350 }
351
352 #undef LOWPASS
353
modify_pred(const int8_t * mod_table,int * mode)354 static inline void modify_pred(const int8_t *mod_table, int *mode)
355 {
356 *mode = mod_table[*mode];
357 if (*mode < 0) {
358 av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
359 *mode = 0;
360 }
361 }
362
ff_cavs_modify_mb_i(AVSContext * h,int * pred_mode_uv)363 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
364 {
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];
370
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);
376 }
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);
381 }
382 }
383
384 /*****************************************************************************
385 *
386 * motion compensation
387 *
388 ****************************************************************************/
389
mc_dir_part(AVSContext * h,AVFrame * pic,int chroma_height,int delta,int list,uint8_t * dest_y,uint8_t * dest_cb,uint8_t * dest_cr,int src_x_offset,int src_y_offset,qpel_mc_func * qpix_op,h264_chroma_mc_func chroma_op,cavs_vector * mv)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)
396 {
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;
403 int extra_width = 0;
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;
409 int emu = 0;
410
411 if (!pic->data[0])
412 return;
413 if (mx & 7)
414 extra_width -= 3;
415 if (my & 7)
416 extra_height -= 3;
417
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;
429 emu = 1;
430 }
431
432 // FIXME try variable height perhaps?
433 qpix_op[luma_xy](dest_y, src_y, h->l_stride);
434
435 if (emu) {
436 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
437 h->c_stride, h->c_stride,
438 9, 9 /* FIXME */,
439 mx >> 3, my >> 3,
440 pic_width >> 1, pic_height >> 1);
441 src_cb = h->edge_emu_buffer;
442 }
443 chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx & 7, my & 7);
444
445 if (emu) {
446 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
447 h->c_stride, h->c_stride,
448 9, 9 /* FIXME */,
449 mx >> 3, my >> 3,
450 pic_width >> 1, pic_height >> 1);
451 src_cr = h->edge_emu_buffer;
452 }
453 chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx & 7, my & 7);
454 }
455
mc_part_std(AVSContext * h,int chroma_height,int delta,uint8_t * dest_y,uint8_t * dest_cb,uint8_t * dest_cr,int x_offset,int y_offset,qpel_mc_func * qpix_put,h264_chroma_mc_func chroma_put,qpel_mc_func * qpix_avg,h264_chroma_mc_func chroma_avg,cavs_vector * mv)456 static inline void mc_part_std(AVSContext *h, int chroma_height, int delta,
457 uint8_t *dest_y,
458 uint8_t *dest_cb,
459 uint8_t *dest_cr,
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,
465 cavs_vector *mv)
466 {
467 qpel_mc_func *qpix_op = qpix_put;
468 h264_chroma_mc_func chroma_op = chroma_put;
469
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;
475
476 if (mv->ref >= 0) {
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);
481
482 qpix_op = qpix_avg;
483 chroma_op = chroma_avg;
484 }
485
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);
491 }
492 }
493
ff_cavs_inter(AVSContext * h,enum cavs_mb mb_type)494 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
495 {
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],
502 &h->mv[MV_FWD_X0]);
503 } else {
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],
509 &h->mv[MV_FWD_X0]);
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],
515 &h->mv[MV_FWD_X1]);
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],
521 &h->mv[MV_FWD_X2]);
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],
527 &h->mv[MV_FWD_X3]);
528 }
529 }
530
531 /*****************************************************************************
532 *
533 * motion vector prediction
534 *
535 ****************************************************************************/
536
scale_mv(AVSContext * h,int * d_x,int * d_y,cavs_vector * src,int distp)537 static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,
538 cavs_vector *src, int distp)
539 {
540 int64_t den = h->scale_den[FFMAX(src->ref, 0)];
541 *d_x = (src->x * distp * den + 256 + FF_SIGNBIT(src->x)) >> 9;
542 *d_y = (src->y * distp * den + 256 + FF_SIGNBIT(src->y)) >> 9;
543 }
544
mv_pred_median(AVSContext * h,cavs_vector * mvP,cavs_vector * mvA,cavs_vector * mvB,cavs_vector * mvC)545 static inline void mv_pred_median(AVSContext *h,
546 cavs_vector *mvP,
547 cavs_vector *mvA,
548 cavs_vector *mvB,
549 cavs_vector *mvC)
550 {
551 int ax, ay, bx, by, cx, cy;
552 int len_ab, len_bc, len_ca, len_mid;
553
554 /* scale candidates according to their temporal span */
555 scale_mv(h, &ax, &ay, mvA, mvP->dist);
556 scale_mv(h, &bx, &by, mvB, mvP->dist);
557 scale_mv(h, &cx, &cy, mvC, mvP->dist);
558 /* find the geometrical median of the three candidates */
559 len_ab = abs(ax - bx) + abs(ay - by);
560 len_bc = abs(bx - cx) + abs(by - cy);
561 len_ca = abs(cx - ax) + abs(cy - ay);
562 len_mid = mid_pred(len_ab, len_bc, len_ca);
563 if (len_mid == len_ab) {
564 mvP->x = cx;
565 mvP->y = cy;
566 } else if (len_mid == len_bc) {
567 mvP->x = ax;
568 mvP->y = ay;
569 } else {
570 mvP->x = bx;
571 mvP->y = by;
572 }
573 }
574
ff_cavs_mv(AVSContext * h,enum cavs_mv_loc nP,enum cavs_mv_loc nC,enum cavs_mv_pred mode,enum cavs_block size,int ref)575 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
576 enum cavs_mv_pred mode, enum cavs_block size, int ref)
577 {
578 cavs_vector *mvP = &h->mv[nP];
579 cavs_vector *mvA = &h->mv[nP-1];
580 cavs_vector *mvB = &h->mv[nP-4];
581 cavs_vector *mvC = &h->mv[nC];
582 const cavs_vector *mvP2 = NULL;
583
584 mvP->ref = ref;
585 mvP->dist = h->dist[mvP->ref];
586 if (mvC->ref == NOT_AVAIL || (nP == MV_FWD_X3) || (nP == MV_BWD_X3 ))
587 mvC = &h->mv[nP - 5]; // set to top-left (mvD)
588 if (mode == MV_PRED_PSKIP &&
589 (mvA->ref == NOT_AVAIL ||
590 mvB->ref == NOT_AVAIL ||
591 (mvA->x | mvA->y | mvA->ref) == 0 ||
592 (mvB->x | mvB->y | mvB->ref) == 0)) {
593 mvP2 = &un_mv;
594 /* if there is only one suitable candidate, take it */
595 } else if (mvA->ref >= 0 && mvB->ref < 0 && mvC->ref < 0) {
596 mvP2 = mvA;
597 } else if (mvA->ref < 0 && mvB->ref >= 0 && mvC->ref < 0) {
598 mvP2 = mvB;
599 } else if (mvA->ref < 0 && mvB->ref < 0 && mvC->ref >= 0) {
600 mvP2 = mvC;
601 } else if (mode == MV_PRED_LEFT && mvA->ref == ref) {
602 mvP2 = mvA;
603 } else if (mode == MV_PRED_TOP && mvB->ref == ref) {
604 mvP2 = mvB;
605 } else if (mode == MV_PRED_TOPRIGHT && mvC->ref == ref) {
606 mvP2 = mvC;
607 }
608 if (mvP2) {
609 mvP->x = mvP2->x;
610 mvP->y = mvP2->y;
611 } else
612 mv_pred_median(h, mvP, mvA, mvB, mvC);
613
614 if (mode < MV_PRED_PSKIP) {
615 int mx = get_se_golomb(&h->gb) + (unsigned)mvP->x;
616 int my = get_se_golomb(&h->gb) + (unsigned)mvP->y;
617
618 if (mx != (int16_t)mx || my != (int16_t)my) {
619 av_log(h->avctx, AV_LOG_ERROR, "MV %d %d out of supported range\n", mx, my);
620 } else {
621 mvP->x = mx;
622 mvP->y = my;
623 }
624 }
625 set_mvs(mvP, size);
626 }
627
628 /*****************************************************************************
629 *
630 * macroblock level
631 *
632 ****************************************************************************/
633
634 /**
635 * initialise predictors for motion vectors and intra prediction
636 */
ff_cavs_init_mb(AVSContext * h)637 void ff_cavs_init_mb(AVSContext *h)
638 {
639 int i;
640
641 /* copy predictors from top line (MB B and C) into cache */
642 for (i = 0; i < 3; i++) {
643 h->mv[MV_FWD_B2 + i] = h->top_mv[0][h->mbx * 2 + i];
644 h->mv[MV_BWD_B2 + i] = h->top_mv[1][h->mbx * 2 + i];
645 }
646 h->pred_mode_Y[1] = h->top_pred_Y[h->mbx * 2 + 0];
647 h->pred_mode_Y[2] = h->top_pred_Y[h->mbx * 2 + 1];
648 /* clear top predictors if MB B is not available */
649 if (!(h->flags & B_AVAIL)) {
650 h->mv[MV_FWD_B2] = un_mv;
651 h->mv[MV_FWD_B3] = un_mv;
652 h->mv[MV_BWD_B2] = un_mv;
653 h->mv[MV_BWD_B3] = un_mv;
654 h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
655 h->flags &= ~(C_AVAIL | D_AVAIL);
656 } else if (h->mbx) {
657 h->flags |= D_AVAIL;
658 }
659 if (h->mbx == h->mb_width - 1) // MB C not available
660 h->flags &= ~C_AVAIL;
661 /* clear top-right predictors if MB C is not available */
662 if (!(h->flags & C_AVAIL)) {
663 h->mv[MV_FWD_C2] = un_mv;
664 h->mv[MV_BWD_C2] = un_mv;
665 }
666 /* clear top-left predictors if MB D is not available */
667 if (!(h->flags & D_AVAIL)) {
668 h->mv[MV_FWD_D3] = un_mv;
669 h->mv[MV_BWD_D3] = un_mv;
670 }
671 }
672
673 /**
674 * save predictors for later macroblocks and increase
675 * macroblock address
676 * @return 0 if end of frame is reached, 1 otherwise
677 */
ff_cavs_next_mb(AVSContext * h)678 int ff_cavs_next_mb(AVSContext *h)
679 {
680 int i;
681
682 h->flags |= A_AVAIL;
683 h->cy += 16;
684 h->cu += 8;
685 h->cv += 8;
686 /* copy mvs as predictors to the left */
687 for (i = 0; i <= 20; i += 4)
688 h->mv[i] = h->mv[i + 2];
689 /* copy bottom mvs from cache to top line */
690 h->top_mv[0][h->mbx * 2 + 0] = h->mv[MV_FWD_X2];
691 h->top_mv[0][h->mbx * 2 + 1] = h->mv[MV_FWD_X3];
692 h->top_mv[1][h->mbx * 2 + 0] = h->mv[MV_BWD_X2];
693 h->top_mv[1][h->mbx * 2 + 1] = h->mv[MV_BWD_X3];
694 /* next MB address */
695 h->mbidx++;
696 h->mbx++;
697 if (h->mbx == h->mb_width) { // New mb line
698 h->flags = B_AVAIL | C_AVAIL;
699 /* clear left pred_modes */
700 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
701 /* clear left mv predictors */
702 for (i = 0; i <= 20; i += 4)
703 h->mv[i] = un_mv;
704 h->mbx = 0;
705 h->mby++;
706 /* re-calculate sample pointers */
707 h->cy = h->cur.f->data[0] + h->mby * 16 * h->l_stride;
708 h->cu = h->cur.f->data[1] + h->mby * 8 * h->c_stride;
709 h->cv = h->cur.f->data[2] + h->mby * 8 * h->c_stride;
710 if (h->mby == h->mb_height) { // Frame end
711 return 0;
712 }
713 }
714 return 1;
715 }
716
717 /*****************************************************************************
718 *
719 * frame level
720 *
721 ****************************************************************************/
722
ff_cavs_init_pic(AVSContext * h)723 int ff_cavs_init_pic(AVSContext *h)
724 {
725 int i;
726
727 /* clear some predictors */
728 for (i = 0; i <= 20; i += 4)
729 h->mv[i] = un_mv;
730 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
731 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
732 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
733 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
734 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
735 h->cy = h->cur.f->data[0];
736 h->cu = h->cur.f->data[1];
737 h->cv = h->cur.f->data[2];
738 h->l_stride = h->cur.f->linesize[0];
739 h->c_stride = h->cur.f->linesize[1];
740 h->luma_scan[2] = 8 * h->l_stride;
741 h->luma_scan[3] = 8 * h->l_stride + 8;
742 h->mbx = h->mby = h->mbidx = 0;
743 h->flags = 0;
744
745 return 0;
746 }
747
748 /*****************************************************************************
749 *
750 * headers and interface
751 *
752 ****************************************************************************/
753
754 /**
755 * some predictions require data from the top-neighbouring macroblock.
756 * this data has to be stored for one complete row of macroblocks
757 * and this storage space is allocated here
758 */
ff_cavs_init_top_lines(AVSContext * h)759 int ff_cavs_init_top_lines(AVSContext *h)
760 {
761 /* alloc top line of predictors */
762 h->top_qp = av_mallocz(h->mb_width);
763 h->top_mv[0] = av_mallocz_array(h->mb_width * 2 + 1, sizeof(cavs_vector));
764 h->top_mv[1] = av_mallocz_array(h->mb_width * 2 + 1, sizeof(cavs_vector));
765 h->top_pred_Y = av_mallocz_array(h->mb_width * 2, sizeof(*h->top_pred_Y));
766 h->top_border_y = av_mallocz_array(h->mb_width + 1, 16);
767 h->top_border_u = av_mallocz_array(h->mb_width, 10);
768 h->top_border_v = av_mallocz_array(h->mb_width, 10);
769
770 /* alloc space for co-located MVs and types */
771 h->col_mv = av_mallocz_array(h->mb_width * h->mb_height,
772 4 * sizeof(cavs_vector));
773 h->col_type_base = av_mallocz(h->mb_width * h->mb_height);
774 h->block = av_mallocz(64 * sizeof(int16_t));
775
776 if (!h->top_qp || !h->top_mv[0] || !h->top_mv[1] || !h->top_pred_Y ||
777 !h->top_border_y || !h->top_border_u || !h->top_border_v ||
778 !h->col_mv || !h->col_type_base || !h->block) {
779 av_freep(&h->top_qp);
780 av_freep(&h->top_mv[0]);
781 av_freep(&h->top_mv[1]);
782 av_freep(&h->top_pred_Y);
783 av_freep(&h->top_border_y);
784 av_freep(&h->top_border_u);
785 av_freep(&h->top_border_v);
786 av_freep(&h->col_mv);
787 av_freep(&h->col_type_base);
788 av_freep(&h->block);
789 return AVERROR(ENOMEM);
790 }
791 return 0;
792 }
793
ff_cavs_init(AVCodecContext * avctx)794 av_cold int ff_cavs_init(AVCodecContext *avctx)
795 {
796 AVSContext *h = avctx->priv_data;
797
798 ff_blockdsp_init(&h->bdsp, avctx);
799 ff_h264chroma_init(&h->h264chroma, 8);
800 ff_idctdsp_init(&h->idsp, avctx);
801 ff_videodsp_init(&h->vdsp, 8);
802 ff_cavsdsp_init(&h->cdsp, avctx);
803 ff_init_scantable_permutation(h->idsp.idct_permutation,
804 h->cdsp.idct_perm);
805 ff_init_scantable(h->idsp.idct_permutation, &h->scantable, ff_zigzag_direct);
806
807 h->avctx = avctx;
808 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
809
810 h->cur.f = av_frame_alloc();
811 h->DPB[0].f = av_frame_alloc();
812 h->DPB[1].f = av_frame_alloc();
813 if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {
814 ff_cavs_end(avctx);
815 return AVERROR(ENOMEM);
816 }
817
818 h->luma_scan[0] = 0;
819 h->luma_scan[1] = 8;
820 h->intra_pred_l[INTRA_L_VERT] = intra_pred_vert;
821 h->intra_pred_l[INTRA_L_HORIZ] = intra_pred_horiz;
822 h->intra_pred_l[INTRA_L_LP] = intra_pred_lp;
823 h->intra_pred_l[INTRA_L_DOWN_LEFT] = intra_pred_down_left;
824 h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
825 h->intra_pred_l[INTRA_L_LP_LEFT] = intra_pred_lp_left;
826 h->intra_pred_l[INTRA_L_LP_TOP] = intra_pred_lp_top;
827 h->intra_pred_l[INTRA_L_DC_128] = intra_pred_dc_128;
828 h->intra_pred_c[INTRA_C_LP] = intra_pred_lp;
829 h->intra_pred_c[INTRA_C_HORIZ] = intra_pred_horiz;
830 h->intra_pred_c[INTRA_C_VERT] = intra_pred_vert;
831 h->intra_pred_c[INTRA_C_PLANE] = intra_pred_plane;
832 h->intra_pred_c[INTRA_C_LP_LEFT] = intra_pred_lp_left;
833 h->intra_pred_c[INTRA_C_LP_TOP] = intra_pred_lp_top;
834 h->intra_pred_c[INTRA_C_DC_128] = intra_pred_dc_128;
835 h->mv[7] = un_mv;
836 h->mv[19] = un_mv;
837 return 0;
838 }
839
ff_cavs_end(AVCodecContext * avctx)840 av_cold int ff_cavs_end(AVCodecContext *avctx)
841 {
842 AVSContext *h = avctx->priv_data;
843
844 av_frame_free(&h->cur.f);
845 av_frame_free(&h->DPB[0].f);
846 av_frame_free(&h->DPB[1].f);
847
848 av_freep(&h->top_qp);
849 av_freep(&h->top_mv[0]);
850 av_freep(&h->top_mv[1]);
851 av_freep(&h->top_pred_Y);
852 av_freep(&h->top_border_y);
853 av_freep(&h->top_border_u);
854 av_freep(&h->top_border_v);
855 av_freep(&h->col_mv);
856 av_freep(&h->col_type_base);
857 av_freep(&h->block);
858 av_freep(&h->edge_emu_buffer);
859 return 0;
860 }
861