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[libav.git] / libavcodec / svq3.c
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1/*
2 * Copyright (c) 2003 The FFmpeg Project.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 *
19 * How to use this decoder:
20 * SVQ3 data is transported within Apple Quicktime files. Quicktime files
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21 * have stsd atoms to describe media trak properties. A stsd atom for a
22 * video trak contains 1 or more ImageDescription atoms. These atoms begin
23 * with the 4-byte length of the atom followed by the codec fourcc. Some
24 * decoders need information in this atom to operate correctly. Such
25 * is the case with SVQ3. In order to get the best use out of this decoder,
26 * the calling app must make the SVQ3 ImageDescription atom available
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27 * via the AVCodecContext's extradata[_size] field:
28 *
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29 * AVCodecContext.extradata = pointer to ImageDescription, first characters
30 * are expected to be 'S', 'V', 'Q', and '3', NOT the 4-byte atom length
31 * AVCodecContext.extradata_size = size of ImageDescription atom memory
32 * buffer (which will be the same as the ImageDescription atom size field
33 * from the QT file, minus 4 bytes since the length is missing)
34 *
35 * You will know you have these parameters passed correctly when the decoder
36 * correctly decodes this file:
37 * ftp://ftp.mplayerhq.hu/MPlayer/samples/V-codecs/SVQ3/Vertical400kbit.sorenson3.mov
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38 *
39 */
40
41/**
42 * @file svq3.c
43 * svq3 decoder.
44 */
45
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46/* dual scan (from some older h264 draft)
47 o-->o-->o o
48 | /|
49 o o o / o
50 | / | |/ |
51 o o o o
52 /
53 o-->o-->o-->o
54*/
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55static const uint8_t svq3_scan[16]={
56 0+0*4, 1+0*4, 2+0*4, 2+1*4,
57 2+2*4, 3+0*4, 3+1*4, 3+2*4,
58 0+1*4, 0+2*4, 1+1*4, 1+2*4,
59 0+3*4, 1+3*4, 2+3*4, 3+3*4,
60};
61
62static const uint8_t svq3_pred_0[25][2] = {
63 { 0, 0 },
64 { 1, 0 }, { 0, 1 },
65 { 0, 2 }, { 1, 1 }, { 2, 0 },
66 { 3, 0 }, { 2, 1 }, { 1, 2 }, { 0, 3 },
67 { 0, 4 }, { 1, 3 }, { 2, 2 }, { 3, 1 }, { 4, 0 },
68 { 4, 1 }, { 3, 2 }, { 2, 3 }, { 1, 4 },
69 { 2, 4 }, { 3, 3 }, { 4, 2 },
70 { 4, 3 }, { 3, 4 },
71 { 4, 4 }
72};
73
74static const int8_t svq3_pred_1[6][6][5] = {
75 { { 2,-1,-1,-1,-1 }, { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 },
76 { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 }, { 1, 2,-1,-1,-1 } },
77 { { 0, 2,-1,-1,-1 }, { 0, 2, 1, 4, 3 }, { 0, 1, 2, 4, 3 },
78 { 0, 2, 1, 4, 3 }, { 2, 0, 1, 3, 4 }, { 0, 4, 2, 1, 3 } },
79 { { 2, 0,-1,-1,-1 }, { 2, 1, 0, 4, 3 }, { 1, 2, 4, 0, 3 },
80 { 2, 1, 0, 4, 3 }, { 2, 1, 4, 3, 0 }, { 1, 2, 4, 0, 3 } },
81 { { 2, 0,-1,-1,-1 }, { 2, 0, 1, 4, 3 }, { 1, 2, 0, 4, 3 },
82 { 2, 1, 0, 4, 3 }, { 2, 1, 3, 4, 0 }, { 2, 4, 1, 0, 3 } },
83 { { 0, 2,-1,-1,-1 }, { 0, 2, 1, 3, 4 }, { 1, 2, 3, 0, 4 },
84 { 2, 0, 1, 3, 4 }, { 2, 1, 3, 0, 4 }, { 2, 0, 4, 3, 1 } },
85 { { 0, 2,-1,-1,-1 }, { 0, 2, 4, 1, 3 }, { 1, 4, 2, 0, 3 },
86 { 4, 2, 0, 1, 3 }, { 2, 0, 1, 4, 3 }, { 4, 2, 1, 0, 3 } },
87};
88
89static const struct { uint8_t run; uint8_t level; } svq3_dct_tables[2][16] = {
90 { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 0, 2 }, { 3, 1 }, { 4, 1 }, { 5, 1 },
91 { 0, 3 }, { 1, 2 }, { 2, 2 }, { 6, 1 }, { 7, 1 }, { 8, 1 }, { 9, 1 }, { 0, 4 } },
92 { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 0, 2 }, { 2, 1 }, { 0, 3 }, { 0, 4 }, { 0, 5 },
93 { 3, 1 }, { 4, 1 }, { 1, 2 }, { 1, 3 }, { 0, 6 }, { 0, 7 }, { 0, 8 }, { 0, 9 } }
94};
95
96static const uint32_t svq3_dequant_coeff[32] = {
97 3881, 4351, 4890, 5481, 6154, 6914, 7761, 8718,
98 9781, 10987, 12339, 13828, 15523, 17435, 19561, 21873,
99 24552, 27656, 30847, 34870, 38807, 43747, 49103, 54683,
100 61694, 68745, 77615, 89113,100253,109366,126635,141533
101};
102
103
104static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp){
105 const int qmul= svq3_dequant_coeff[qp];
106#define stride 16
107 int i;
108 int temp[16];
109 static const int x_offset[4]={0, 1*stride, 4* stride, 5*stride};
110 static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
111
112 for(i=0; i<4; i++){
113 const int offset= y_offset[i];
114 const int z0= 13*(block[offset+stride*0] + block[offset+stride*4]);
115 const int z1= 13*(block[offset+stride*0] - block[offset+stride*4]);
116 const int z2= 7* block[offset+stride*1] - 17*block[offset+stride*5];
117 const int z3= 17* block[offset+stride*1] + 7*block[offset+stride*5];
118
119 temp[4*i+0]= z0+z3;
120 temp[4*i+1]= z1+z2;
121 temp[4*i+2]= z1-z2;
122 temp[4*i+3]= z0-z3;
123 }
124
125 for(i=0; i<4; i++){
126 const int offset= x_offset[i];
127 const int z0= 13*(temp[4*0+i] + temp[4*2+i]);
128 const int z1= 13*(temp[4*0+i] - temp[4*2+i]);
129 const int z2= 7* temp[4*1+i] - 17*temp[4*3+i];
130 const int z3= 17* temp[4*1+i] + 7*temp[4*3+i];
131
132 block[stride*0 +offset]= ((z0 + z3)*qmul + 0x80000)>>20;
133 block[stride*2 +offset]= ((z1 + z2)*qmul + 0x80000)>>20;
134 block[stride*8 +offset]= ((z1 - z2)*qmul + 0x80000)>>20;
135 block[stride*10+offset]= ((z0 - z3)*qmul + 0x80000)>>20;
136 }
137}
138#undef stride
139
140static void svq3_add_idct_c (uint8_t *dst, DCTELEM *block, int stride, int qp, int dc){
141 const int qmul= svq3_dequant_coeff[qp];
142 int i;
143 uint8_t *cm = cropTbl + MAX_NEG_CROP;
144
145 if (dc) {
146 dc = 13*13*((dc == 1) ? 1538*block[0] : ((qmul*(block[0] >> 3)) / 2));
147 block[0] = 0;
148 }
149
150 for (i=0; i < 4; i++) {
151 const int z0= 13*(block[0 + 4*i] + block[2 + 4*i]);
152 const int z1= 13*(block[0 + 4*i] - block[2 + 4*i]);
153 const int z2= 7* block[1 + 4*i] - 17*block[3 + 4*i];
154 const int z3= 17* block[1 + 4*i] + 7*block[3 + 4*i];
155
156 block[0 + 4*i]= z0 + z3;
157 block[1 + 4*i]= z1 + z2;
158 block[2 + 4*i]= z1 - z2;
159 block[3 + 4*i]= z0 - z3;
160 }
161
162 for (i=0; i < 4; i++) {
163 const int z0= 13*(block[i + 4*0] + block[i + 4*2]);
164 const int z1= 13*(block[i + 4*0] - block[i + 4*2]);
165 const int z2= 7* block[i + 4*1] - 17*block[i + 4*3];
166 const int z3= 17* block[i + 4*1] + 7*block[i + 4*3];
167 const int rr= (dc + 0x80000);
168
169 dst[i + stride*0]= cm[ dst[i + stride*0] + (((z0 + z3)*qmul + rr) >> 20) ];
170 dst[i + stride*1]= cm[ dst[i + stride*1] + (((z1 + z2)*qmul + rr) >> 20) ];
171 dst[i + stride*2]= cm[ dst[i + stride*2] + (((z1 - z2)*qmul + rr) >> 20) ];
172 dst[i + stride*3]= cm[ dst[i + stride*3] + (((z0 - z3)*qmul + rr) >> 20) ];
173 }
174}
175
176static void pred4x4_down_left_svq3_c(uint8_t *src, uint8_t *topright, int stride){
177 LOAD_TOP_EDGE
178 LOAD_LEFT_EDGE
179 const __attribute__((unused)) int unu0= t0;
180 const __attribute__((unused)) int unu1= l0;
181
182 src[0+0*stride]=(l1 + t1)>>1;
183 src[1+0*stride]=
184 src[0+1*stride]=(l2 + t2)>>1;
185 src[2+0*stride]=
186 src[1+1*stride]=
187 src[0+2*stride]=
188 src[3+0*stride]=
189 src[2+1*stride]=
190 src[1+2*stride]=
191 src[0+3*stride]=
192 src[3+1*stride]=
193 src[2+2*stride]=
194 src[1+3*stride]=
195 src[3+2*stride]=
196 src[2+3*stride]=
197 src[3+3*stride]=(l3 + t3)>>1;
198};
199
200static void pred16x16_plane_svq3_c(uint8_t *src, int stride){
201 pred16x16_plane_compat_c(src, stride, 1);
202}
203
204static inline int svq3_decode_block (GetBitContext *gb, DCTELEM *block,
205 int index, const int type) {
206
207 static const uint8_t *const scan_patterns[4] =
208 { luma_dc_zigzag_scan, zigzag_scan, svq3_scan, chroma_dc_scan };
209
210 int run, level, sign, vlc, limit;
211 const int intra = (3 * type) >> 2;
212 const uint8_t *const scan = scan_patterns[type];
213
214 for (limit=(16 >> intra); index < 16; index=limit, limit+=8) {
215 for (; (vlc = svq3_get_ue_golomb (gb)) != 0; index++) {
216
217 if (vlc == INVALID_VLC)
218 return -1;
219
220 sign = (vlc & 0x1) - 1;
221 vlc = (vlc + 1) >> 1;
222
223 if (type == 3) {
224 if (vlc < 3) {
225 run = 0;
226 level = vlc;
227 } else if (vlc < 4) {
228 run = 1;
229 level = 1;
230 } else {
231 run = (vlc & 0x3);
232 level = ((vlc + 9) >> 2) - run;
233 }
234 } else {
235 if (vlc < 16) {
236 run = svq3_dct_tables[intra][vlc].run;
237 level = svq3_dct_tables[intra][vlc].level;
238 } else if (intra) {
239 run = (vlc & 0x7);
240 level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1)));
241 } else {
242 run = (vlc & 0xF);
243 level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0)));
244 }
245 }
246
247 if ((index += run) >= limit)
248 return -1;
249
250 block[scan[index]] = (level ^ sign) - sign;
251 }
252
253 if (type != 2) {
254 break;
255 }
256 }
257
258 return 0;
259}
260
261static void sixpel_mc_put (MpegEncContext *s,
262 uint8_t *src, uint8_t *dst, int stride,
263 int dxy, int width, int height) {
264 int i, j;
265
266 switch (dxy) {
267 case 6*0+0:
268 for (i=0; i < height; i++) {
269 memcpy (dst, src, width);
270 src += stride;
271 dst += stride;
272 }
273 break;
274 case 6*0+2:
275 for (i=0; i < height; i++) {
276 for (j=0; j < width; j++) {
277 dst[j] = (683*(2*src[j] + src[j+1] + 1)) >> 11;
278 }
279 src += stride;
280 dst += stride;
281 }
282 break;
283 case 6*0+3:
284 for (i=0; i < height; i++) {
285 for (j=0; j < width; j++) {
286 dst[j] = (src[j] + src[j+1] + 1) >> 1;
287 }
288 src += stride;
289 dst += stride;
290 }
291 break;
292 case 6*0+4:
293 for (i=0; i < height; i++) {
294 for (j=0; j < width; j++) {
295 dst[j] = (683*(src[j] + 2*src[j+1] + 1)) >> 11;
296 }
297 src += stride;
298 dst += stride;
299 }
300 break;
301 case 6*2+0:
302 for (i=0; i < height; i++) {
303 for (j=0; j < width; j++) {
304 dst[j] = (683*(2*src[j] + src[j+stride] + 1)) >> 11;
305 }
306 src += stride;
307 dst += stride;
308 }
309 break;
310 case 6*2+2:
311 for (i=0; i < height; i++) {
312 for (j=0; j < width; j++) {
313 dst[j] = (2731*(4*src[j] + 3*src[j+1] + 3*src[j+stride] + 2*src[j+stride+1] + 6)) >> 15;
314 }
315 src += stride;
316 dst += stride;
317 }
318 break;
319 case 6*2+4:
320 for (i=0; i < height; i++) {
321 for (j=0; j < width; j++) {
322 dst[j] = (2731*(3*src[j] + 4*src[j+1] + 2*src[j+stride] + 3*src[j+stride+1] + 6)) >> 15;
323 }
324 src += stride;
325 dst += stride;
326 }
327 break;
328 case 6*3+0:
329 for (i=0; i < height; i++) {
330 for (j=0; j < width; j++) {
331 dst[j] = (src[j] + src[j+stride]+1) >> 1;
332 }
333 src += stride;
334 dst += stride;
335 }
336 break;
337 case 6*3+3:
338 for (i=0; i < height; i++) {
339 for (j=0; j < width; j++) {
340 dst[j] = (src[j] + src[j+1] + src[j+stride] + src[j+stride+1] + 2) >> 2;
341 }
342 src += stride;
343 dst += stride;
344 }
345 break;
346 case 6*4+0:
347 for (i=0; i < height; i++) {
348 for (j=0; j < width; j++) {
349 dst[j] = (683*(src[j] + 2*src[j+stride] + 1)) >> 11;
350 }
351 src += stride;
352 dst += stride;
353 }
354 break;
355 case 6*4+2:
356 for (i=0; i < height; i++) {
357 for (j=0; j < width; j++) {
358 dst[j] = (2731*(3*src[j] + 2*src[j+1] + 4*src[j+stride] + 3*src[j+stride+1] + 6)) >> 15;
359 }
360 src += stride;
361 dst += stride;
362 }
363 break;
364 case 6*4+4:
365 for (i=0; i < height; i++) {
366 for (j=0; j < width; j++) {
367 dst[j] = (2731*(2*src[j] + 3*src[j+1] + 3*src[j+stride] + 4*src[j+stride+1] + 6)) >> 15;
368 }
369 src += stride;
370 dst += stride;
371 }
372 break;
373 }
374}
375
376static inline void svq3_mc_dir_part (MpegEncContext *s, int x, int y,
377 int width, int height, int mx, int my) {
378 uint8_t *src, *dest;
379 int i, emu = 0;
380 const int sx = ((unsigned) (mx + 0x7FFFFFFE)) % 6;
381 const int sy = ((unsigned) (my + 0x7FFFFFFE)) % 6;
382 const int dxy= 6*sy + sx;
383
384 /* decode and clip motion vector to frame border (+16) */
385 mx = x + (mx - sx) / 6;
386 my = y + (my - sy) / 6;
387
388 if (mx < 0 || mx >= (s->width - width - 1) ||
389 my < 0 || my >= (s->height - height - 1)) {
390
391 if ((s->flags & CODEC_FLAG_EMU_EDGE)) {
392 emu = 1;
393 }
394
395 mx = clip (mx, -16, (s->width - width + 15));
396 my = clip (my, -16, (s->height - height + 15));
397 }
398
399 /* form component predictions */
400 dest = s->current_picture.data[0] + x + y*s->linesize;
401 src = s->last_picture.data[0] + mx + my*s->linesize;
402
403 if (emu) {
404 ff_emulated_edge_mc (s, src, s->linesize, (width + 1), (height + 1),
405 mx, my, s->width, s->height);
406 src = s->edge_emu_buffer;
407 }
408 sixpel_mc_put (s, src, dest, s->linesize, dxy, width, height);
409
410 if (!(s->flags & CODEC_FLAG_GRAY)) {
411 mx = (mx + (mx < (int) x)) >> 1;
412 my = (my + (my < (int) y)) >> 1;
413 width = (width >> 1);
414 height = (height >> 1);
415
416 for (i=1; i < 3; i++) {
417 dest = s->current_picture.data[i] + (x >> 1) + (y >> 1)*s->uvlinesize;
418 src = s->last_picture.data[i] + mx + my*s->uvlinesize;
419
420 if (emu) {
421 ff_emulated_edge_mc (s, src, s->uvlinesize, (width + 1), (height + 1),
422 mx, my, (s->width >> 1), (s->height >> 1));
423 src = s->edge_emu_buffer;
424 }
425 sixpel_mc_put (s, src, dest, s->uvlinesize, dxy, width, height);
426 }
427 }
428}
429
430static int svq3_decode_mb (H264Context *h, unsigned int mb_type) {
431 int cbp, dir, mode, mx, my, dx, dy, x, y, part_width, part_height;
432 int i, j, k, l, m;
433 uint32_t vlc;
434 int8_t *top, *left;
435 MpegEncContext *const s = (MpegEncContext *) h;
436 const int mb_xy = s->mb_x + s->mb_y*s->mb_stride;
437 const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
438
439 h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
440 h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
441 h->topright_samples_available = 0xFFFF;
442
443 if (mb_type == 0) { /* SKIP */
444 svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0);
445
446 cbp = 0;
447 mb_type = MB_TYPE_SKIP;
448 } else if (mb_type < 8) { /* INTER */
449 if (h->thirdpel_flag && h->halfpel_flag == !get_bits (&s->gb, 1)) {
450 mode = 3; /* thirdpel */
451 } else if (h->halfpel_flag && h->thirdpel_flag == !get_bits (&s->gb, 1)) {
452 mode = 2; /* halfpel */
453 } else {
454 mode = 1; /* fullpel */
455 }
456
457 /* fill caches */
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458 /* note ref_cache[0] should contain here:
459 ????????
460 ???11111
461 N??11111
462 N??11111
463 N??11111
464 N
465 */
466
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467 if (s->mb_x > 0) {
468 for (i=0; i < 4; i++) {
469 *(uint32_t *) h->mv_cache[0][scan8[0] - 1 + i*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - 1 + i*h->b_stride];
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470 }
471 } else {
472 for (i=0; i < 4; i++) {
473 *(uint32_t *) h->mv_cache[0][scan8[0] - 1 + i*8] = 0;
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474 }
475 }
476 if (s->mb_y > 0) {
477 memcpy (h->mv_cache[0][scan8[0] - 1*8], s->current_picture.motion_val[0][b_xy - h->b_stride], 4*2*sizeof(int16_t));
478 memset (&h->ref_cache[0][scan8[0] - 1*8], 1, 4);
479
480 if (s->mb_x < (s->mb_width - 1)) {
481 *(uint32_t *) h->mv_cache[0][scan8[0] + 4 - 1*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - h->b_stride + 4];
482 h->ref_cache[0][scan8[0] + 4 - 1*8] = 1;
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483 }else
484 h->ref_cache[0][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE;
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485 if (s->mb_x > 0) {
486 *(uint32_t *) h->mv_cache[0][scan8[0] - 1 - 1*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - h->b_stride - 1];
487 h->ref_cache[0][scan8[0] - 1 - 1*8] = 1;
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488 }else
489 h->ref_cache[0][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE;
490 }else
491 memset (&h->ref_cache[0][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8);
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492
493 /* decode motion vector(s) and form prediction(s) */
494 part_width = ((mb_type & 5) == 5) ? 4 : 8 << (mb_type & 1);
495 part_height = 16 >> ((unsigned) mb_type / 3);
496
497 for (i=0; i < 16; i+=part_height) {
498 for (j=0; j < 16; j+=part_width) {
499 x = 16*s->mb_x + j;
500 y = 16*s->mb_y + i;
501 k = ((j>>2)&1) + ((i>>1)&2) + ((j>>1)&4) + (i&8);
502
503 pred_motion (h, k, (part_width >> 2), 0, 1, &mx, &my);
504
505 /* clip motion vector prediction to frame border */
506 mx = clip (mx, -6*x, 6*(s->width - part_width - x));
507 my = clip (my, -6*y, 6*(s->height - part_height - y));
508
509 /* get motion vector differential */
510 dy = svq3_get_se_golomb (&s->gb);
511 dx = svq3_get_se_golomb (&s->gb);
512
513 if (dx == INVALID_VLC || dy == INVALID_VLC) {
514 return -1;
515 }
516
517 /* compute motion vector */
518 if (mode == 3) {
519 mx = ((mx + 1) & ~0x1) + 2*dx;
520 my = ((my + 1) & ~0x1) + 2*dy;
521 } else if (mode == 2) {
522 mx = (mx + 1) - ((unsigned) (0x7FFFFFFF + mx) % 3) + 3*dx;
523 my = (my + 1) - ((unsigned) (0x7FFFFFFF + my) % 3) + 3*dy;
524 } else if (mode == 1) {
525 mx = (mx + 3) - ((unsigned) (0x7FFFFFFB + mx) % 6) + 6*dx;
526 my = (my + 3) - ((unsigned) (0x7FFFFFFB + my) % 6) + 6*dy;
527 }
528
529 /* update mv_cache */
f7a8c179 530 fill_rectangle(h->mv_cache[0][scan8[k]], part_width>>2, part_height>>2, 8, (mx&0xFFFF)+(my<<16), 4);
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531
532 svq3_mc_dir_part (s, x, y, part_width, part_height, mx, my);
533 }
534 }
535
536 for (i=0; i < 4; i++) {
537 memcpy (s->current_picture.motion_val[0][b_xy + i*h->b_stride], h->mv_cache[0][scan8[0] + 8*i], 4*2*sizeof(int16_t));
538 }
539
540 if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48)
541 return -1;
542
543 cbp = golomb_to_inter_cbp[vlc];
544 mb_type = MB_TYPE_16x16;
545 } else if (mb_type == 8) { /* INTRA4x4 */
546 memset (h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t));
547
548 if (s->mb_x > 0) {
549 for (i=0; i < 4; i++) {
550 h->intra4x4_pred_mode_cache[scan8[0] - 1 + i*8] = h->intra4x4_pred_mode[mb_xy - 1][i];
551 }
552 }
553 if (s->mb_y > 0) {
554 h->intra4x4_pred_mode_cache[4+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][4];
555 h->intra4x4_pred_mode_cache[5+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][5];
556 h->intra4x4_pred_mode_cache[6+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][6];
557 h->intra4x4_pred_mode_cache[7+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][3];
558 }
559
560 /* decode prediction codes for luma blocks */
561 for (i=0; i < 16; i+=2) {
562 vlc = svq3_get_ue_golomb (&s->gb);
563
564 if (vlc >= 25)
565 return -1;
566
567 left = &h->intra4x4_pred_mode_cache[scan8[i] - 1];
568 top = &h->intra4x4_pred_mode_cache[scan8[i] - 8];
569
570 left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]];
571 left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]];
572
573 if (left[1] == -1 || left[2] == -1)
574 return -1;
575 }
576
577 write_back_intra_pred_mode (h);
578 check_intra4x4_pred_mode (h);
579
580 if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48)
581 return -1;
582
583 cbp = golomb_to_intra4x4_cbp[vlc];
584 mb_type = MB_TYPE_INTRA4x4;
585 } else { /* INTRA16x16 */
586 dir = i_mb_type_info[mb_type - 8].pred_mode;
587 dir = (dir >> 1) ^ 3*(dir & 1) ^ 1;
588
589 if ((h->intra16x16_pred_mode = check_intra_pred_mode (h, dir)) == -1)
590 return -1;
591
592 cbp = i_mb_type_info[mb_type - 8].cbp;
593 mb_type = MB_TYPE_INTRA16x16;
594 }
595
596 if (!IS_INTER(mb_type) && s->pict_type != I_TYPE) {
597 for (i=0; i < 4; i++) {
598 memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
599 }
600 }
601 if (!IS_INTRA4x4(mb_type)) {
602 memset (h->intra4x4_pred_mode[mb_xy], DC_PRED, 8);
603 }
604 if (!IS_SKIP(mb_type)) {
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605 memset (h->non_zero_count_cache + 8, 0, 4*9*sizeof(uint8_t));
606 s->dsp.clear_blocks(h->mb);
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607 }
608
609 if (IS_INTRA16x16(mb_type) || (s->pict_type != I_TYPE && s->adaptive_quant && cbp)) {
610 s->qscale += svq3_get_se_golomb (&s->gb);
611
612 if (s->qscale > 31)
613 return -1;
614 }
615 if (IS_INTRA16x16(mb_type)) {
616 if (svq3_decode_block (&s->gb, h->mb, 0, 0))
617 return -1;
618 }
619
620 if (!IS_SKIP(mb_type) && cbp) {
621 l = IS_INTRA16x16(mb_type) ? 1 : 0;
622 m = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1);
623
624 for (i=0; i < 4; i++) {
625 if ((cbp & (1 << i))) {
626 for (j=0; j < 4; j++) {
627 k = l ? ((j&1) + 2*(i&1) + 2*(j&2) + 4*(i&2)) : (4*i + j);
628 h->non_zero_count_cache[ scan8[k] ] = 1;
629
630 if (svq3_decode_block (&s->gb, &h->mb[16*k], l, m))
631 return -1;
632 }
633 }
634 }
635
636 if ((cbp & 0x30)) {
637 for (i=0; i < 2; ++i) {
638 if (svq3_decode_block (&s->gb, &h->mb[16*(16 + 4*i)], 0, 3))
639 return -1;
640 }
641
642 if ((cbp & 0x20)) {
643 for (i=0; i < 8; i++) {
644 h->non_zero_count_cache[ scan8[16+i] ] = 1;
645
646 if (svq3_decode_block (&s->gb, &h->mb[16*(16 + i)], 1, 1))
647 return -1;
648 }
649 }
650 }
651 }
652
653 s->current_picture.mb_type[mb_xy] = mb_type;
654
655 if (IS_INTRA(mb_type)) {
656 h->chroma_pred_mode = check_intra_pred_mode (h, DC_PRED8x8);
657 }
658
659 return 0;
660}
661
662static int svq3_decode_frame (AVCodecContext *avctx,
663 void *data, int *data_size,
664 uint8_t *buf, int buf_size) {
665 MpegEncContext *const s = avctx->priv_data;
666 H264Context *const h = avctx->priv_data;
667 int i;
668
669 s->flags = avctx->flags;
670
671 if (!s->context_initialized) {
672 s->width = (avctx->width + 15) & ~15;
673 s->height = (avctx->height + 15) & ~15;
674 h->b_stride = (s->width >> 2);
675 h->pred4x4[DIAG_DOWN_LEFT_PRED] = pred4x4_down_left_svq3_c;
676 h->pred16x16[PLANE_PRED8x8] = pred16x16_plane_svq3_c;
677 h->halfpel_flag = 1;
678 h->thirdpel_flag = 1;
679 h->chroma_qp = 4;
680
681 if (MPV_common_init (s) < 0)
682 return -1;
683
684 alloc_tables (h);
685 }
89a79364
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686 if (avctx->extradata && avctx->extradata_size >= 0x63
687 && !memcmp (avctx->extradata, "SVQ3", 4)) {
8b82a956 688
89a79364 689 uint8_t *stsd = (uint8_t *) avctx->extradata + 0x62;
8b82a956 690
89a79364 691 if ((*stsd >> 5) != 7 || avctx->extradata_size >= 0x66) {
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692
693 if ((*stsd >> 5) == 7) {
694 stsd += 3; /* skip width, height (12 bits each) */
695 }
696
697 h->halfpel_flag = (*stsd >> 4) & 1;
698 h->thirdpel_flag = (*stsd >> 3) & 1;
699 }
700 }
701
702 if ((buf[0] & 0x9F) != 1) {
703 /* TODO: what? */
704 fprintf (stderr, "unsupported header (%02X)\n", buf[0]);
705 return -1;
706 } else {
707 int length = (buf[0] >> 5) & 3;
708 int offset = 0;
709
710 for (i=0; i < length; i++) {
711 offset = (offset << 8) | buf[i + 1];
712 }
713
714 if (buf_size < (offset + length + 1) || length == 0)
715 return -1;
716
717 memcpy (&buf[2], &buf[offset + 2], (length - 1));
718 }
719
720 init_get_bits (&s->gb, &buf[2], 8*(buf_size - 2));
721
722 if ((i = svq3_get_ue_golomb (&s->gb)) == INVALID_VLC || i >= 3)
723 return -1;
724
725 s->pict_type = golomb_to_pict_type[i];
726
727 /* unknown fields */
728 get_bits (&s->gb, 1);
729 get_bits (&s->gb, 8);
730
731 s->qscale = get_bits (&s->gb, 5);
732 s->adaptive_quant = get_bits (&s->gb, 1);
733
734 /* unknown fields */
735 get_bits (&s->gb, 1);
736 get_bits (&s->gb, 1);
737 get_bits (&s->gb, 2);
738
739 while (get_bits (&s->gb, 1)) {
740 get_bits (&s->gb, 8);
741 }
4704097a
MN
742
743 if(avctx->debug&FF_DEBUG_PICT_INFO){
744 printf("%c hpel:%d, tpel:%d aqp:%d qp:%d\n",
d8085ea7 745 av_get_pict_type_char(s->pict_type), h->halfpel_flag, h->thirdpel_flag,
4704097a
MN
746 s->adaptive_quant, s->qscale
747 );
748 }
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749
750 /* B-frames are not supported */
751 if (s->pict_type == B_TYPE/* && avctx->hurry_up*/)
752 return buf_size;
753
754 frame_start (h);
755
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756 for(i=0; i<4; i++){
757 int j;
758 for(j=-1; j<4; j++)
759 h->ref_cache[0][scan8[0] + 8*i + j]= 1;
760 h->ref_cache[0][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE;
761 }
762
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763 for (s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) {
764 for (s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
765 int mb_type = svq3_get_ue_golomb (&s->gb);
766
767 if (s->pict_type == I_TYPE) {
768 mb_type += 8;
769 }
770 if (mb_type > 32 || svq3_decode_mb (h, mb_type)) {
771 fprintf (stderr, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
772 return -1;
773 }
774
775 if (mb_type != 0) {
776 hl_decode_mb (h);
777 }
778 }
779 }
780
781 *(AVFrame *) data = *(AVFrame *) &s->current_picture;
782 *data_size = sizeof(AVFrame);
783
784 MPV_frame_end(s);
785
786 return buf_size;
787}
788
789
790AVCodec svq3_decoder = {
791 "svq3",
792 CODEC_TYPE_VIDEO,
793 CODEC_ID_SVQ3,
794 sizeof(H264Context),
795 decode_init,
796 NULL,
797 decode_end,
798 svq3_decode_frame,
799 CODEC_CAP_DR1,
800};