1000l to the ffsvq3 author, our default bitstream reader is only guranteed to be...
[libav.git] / libavcodec / svq3.c
CommitLineData
8b82a956
MN
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
89a79364
MM
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
8b82a956
MN
27 * via the AVCodecContext's extradata[_size] field:
28 *
89a79364
MM
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
8b82a956
MN
38 *
39 */
40
41/**
42 * @file svq3.c
43 * svq3 decoder.
44 */
45
94d44f45
MN
46#define FULLPEL_MODE 1
47#define HALFPEL_MODE 2
48#define THIRDPEL_MODE 3
2e26c8d2 49#define PREDICT_MODE 4
94d44f45 50
f7a8c179
MN
51/* dual scan (from some older h264 draft)
52 o-->o-->o o
53 | /|
54 o o o / o
55 | / | |/ |
56 o o o o
57 /
58 o-->o-->o-->o
59*/
8b82a956
MN
60static const uint8_t svq3_scan[16]={
61 0+0*4, 1+0*4, 2+0*4, 2+1*4,
62 2+2*4, 3+0*4, 3+1*4, 3+2*4,
63 0+1*4, 0+2*4, 1+1*4, 1+2*4,
64 0+3*4, 1+3*4, 2+3*4, 3+3*4,
65};
66
67static const uint8_t svq3_pred_0[25][2] = {
68 { 0, 0 },
69 { 1, 0 }, { 0, 1 },
70 { 0, 2 }, { 1, 1 }, { 2, 0 },
71 { 3, 0 }, { 2, 1 }, { 1, 2 }, { 0, 3 },
72 { 0, 4 }, { 1, 3 }, { 2, 2 }, { 3, 1 }, { 4, 0 },
73 { 4, 1 }, { 3, 2 }, { 2, 3 }, { 1, 4 },
74 { 2, 4 }, { 3, 3 }, { 4, 2 },
75 { 4, 3 }, { 3, 4 },
76 { 4, 4 }
77};
78
79static const int8_t svq3_pred_1[6][6][5] = {
80 { { 2,-1,-1,-1,-1 }, { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 },
81 { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 }, { 1, 2,-1,-1,-1 } },
82 { { 0, 2,-1,-1,-1 }, { 0, 2, 1, 4, 3 }, { 0, 1, 2, 4, 3 },
83 { 0, 2, 1, 4, 3 }, { 2, 0, 1, 3, 4 }, { 0, 4, 2, 1, 3 } },
84 { { 2, 0,-1,-1,-1 }, { 2, 1, 0, 4, 3 }, { 1, 2, 4, 0, 3 },
85 { 2, 1, 0, 4, 3 }, { 2, 1, 4, 3, 0 }, { 1, 2, 4, 0, 3 } },
86 { { 2, 0,-1,-1,-1 }, { 2, 0, 1, 4, 3 }, { 1, 2, 0, 4, 3 },
87 { 2, 1, 0, 4, 3 }, { 2, 1, 3, 4, 0 }, { 2, 4, 1, 0, 3 } },
88 { { 0, 2,-1,-1,-1 }, { 0, 2, 1, 3, 4 }, { 1, 2, 3, 0, 4 },
89 { 2, 0, 1, 3, 4 }, { 2, 1, 3, 0, 4 }, { 2, 0, 4, 3, 1 } },
90 { { 0, 2,-1,-1,-1 }, { 0, 2, 4, 1, 3 }, { 1, 4, 2, 0, 3 },
91 { 4, 2, 0, 1, 3 }, { 2, 0, 1, 4, 3 }, { 4, 2, 1, 0, 3 } },
92};
93
94static const struct { uint8_t run; uint8_t level; } svq3_dct_tables[2][16] = {
95 { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 0, 2 }, { 3, 1 }, { 4, 1 }, { 5, 1 },
96 { 0, 3 }, { 1, 2 }, { 2, 2 }, { 6, 1 }, { 7, 1 }, { 8, 1 }, { 9, 1 }, { 0, 4 } },
97 { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 0, 2 }, { 2, 1 }, { 0, 3 }, { 0, 4 }, { 0, 5 },
98 { 3, 1 }, { 4, 1 }, { 1, 2 }, { 1, 3 }, { 0, 6 }, { 0, 7 }, { 0, 8 }, { 0, 9 } }
99};
100
101static const uint32_t svq3_dequant_coeff[32] = {
102 3881, 4351, 4890, 5481, 6154, 6914, 7761, 8718,
103 9781, 10987, 12339, 13828, 15523, 17435, 19561, 21873,
104 24552, 27656, 30847, 34870, 38807, 43747, 49103, 54683,
105 61694, 68745, 77615, 89113,100253,109366,126635,141533
106};
107
108
109static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp){
110 const int qmul= svq3_dequant_coeff[qp];
111#define stride 16
112 int i;
113 int temp[16];
114 static const int x_offset[4]={0, 1*stride, 4* stride, 5*stride};
115 static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
116
117 for(i=0; i<4; i++){
118 const int offset= y_offset[i];
119 const int z0= 13*(block[offset+stride*0] + block[offset+stride*4]);
120 const int z1= 13*(block[offset+stride*0] - block[offset+stride*4]);
121 const int z2= 7* block[offset+stride*1] - 17*block[offset+stride*5];
122 const int z3= 17* block[offset+stride*1] + 7*block[offset+stride*5];
123
124 temp[4*i+0]= z0+z3;
125 temp[4*i+1]= z1+z2;
126 temp[4*i+2]= z1-z2;
127 temp[4*i+3]= z0-z3;
128 }
129
130 for(i=0; i<4; i++){
131 const int offset= x_offset[i];
132 const int z0= 13*(temp[4*0+i] + temp[4*2+i]);
133 const int z1= 13*(temp[4*0+i] - temp[4*2+i]);
134 const int z2= 7* temp[4*1+i] - 17*temp[4*3+i];
135 const int z3= 17* temp[4*1+i] + 7*temp[4*3+i];
136
137 block[stride*0 +offset]= ((z0 + z3)*qmul + 0x80000)>>20;
138 block[stride*2 +offset]= ((z1 + z2)*qmul + 0x80000)>>20;
139 block[stride*8 +offset]= ((z1 - z2)*qmul + 0x80000)>>20;
140 block[stride*10+offset]= ((z0 - z3)*qmul + 0x80000)>>20;
141 }
142}
143#undef stride
144
145static void svq3_add_idct_c (uint8_t *dst, DCTELEM *block, int stride, int qp, int dc){
146 const int qmul= svq3_dequant_coeff[qp];
147 int i;
148 uint8_t *cm = cropTbl + MAX_NEG_CROP;
149
150 if (dc) {
151 dc = 13*13*((dc == 1) ? 1538*block[0] : ((qmul*(block[0] >> 3)) / 2));
152 block[0] = 0;
153 }
154
155 for (i=0; i < 4; i++) {
156 const int z0= 13*(block[0 + 4*i] + block[2 + 4*i]);
157 const int z1= 13*(block[0 + 4*i] - block[2 + 4*i]);
158 const int z2= 7* block[1 + 4*i] - 17*block[3 + 4*i];
159 const int z3= 17* block[1 + 4*i] + 7*block[3 + 4*i];
160
161 block[0 + 4*i]= z0 + z3;
162 block[1 + 4*i]= z1 + z2;
163 block[2 + 4*i]= z1 - z2;
164 block[3 + 4*i]= z0 - z3;
165 }
166
167 for (i=0; i < 4; i++) {
168 const int z0= 13*(block[i + 4*0] + block[i + 4*2]);
169 const int z1= 13*(block[i + 4*0] - block[i + 4*2]);
170 const int z2= 7* block[i + 4*1] - 17*block[i + 4*3];
171 const int z3= 17* block[i + 4*1] + 7*block[i + 4*3];
172 const int rr= (dc + 0x80000);
173
174 dst[i + stride*0]= cm[ dst[i + stride*0] + (((z0 + z3)*qmul + rr) >> 20) ];
175 dst[i + stride*1]= cm[ dst[i + stride*1] + (((z1 + z2)*qmul + rr) >> 20) ];
176 dst[i + stride*2]= cm[ dst[i + stride*2] + (((z1 - z2)*qmul + rr) >> 20) ];
177 dst[i + stride*3]= cm[ dst[i + stride*3] + (((z0 - z3)*qmul + rr) >> 20) ];
178 }
179}
180
181static void pred4x4_down_left_svq3_c(uint8_t *src, uint8_t *topright, int stride){
182 LOAD_TOP_EDGE
183 LOAD_LEFT_EDGE
184 const __attribute__((unused)) int unu0= t0;
185 const __attribute__((unused)) int unu1= l0;
186
187 src[0+0*stride]=(l1 + t1)>>1;
188 src[1+0*stride]=
189 src[0+1*stride]=(l2 + t2)>>1;
190 src[2+0*stride]=
191 src[1+1*stride]=
192 src[0+2*stride]=
193 src[3+0*stride]=
194 src[2+1*stride]=
195 src[1+2*stride]=
196 src[0+3*stride]=
197 src[3+1*stride]=
198 src[2+2*stride]=
199 src[1+3*stride]=
200 src[3+2*stride]=
201 src[2+3*stride]=
202 src[3+3*stride]=(l3 + t3)>>1;
4cfbf61b 203}
8b82a956
MN
204
205static void pred16x16_plane_svq3_c(uint8_t *src, int stride){
206 pred16x16_plane_compat_c(src, stride, 1);
207}
208
209static inline int svq3_decode_block (GetBitContext *gb, DCTELEM *block,
210 int index, const int type) {
211
212 static const uint8_t *const scan_patterns[4] =
213 { luma_dc_zigzag_scan, zigzag_scan, svq3_scan, chroma_dc_scan };
214
215 int run, level, sign, vlc, limit;
216 const int intra = (3 * type) >> 2;
217 const uint8_t *const scan = scan_patterns[type];
218
219 for (limit=(16 >> intra); index < 16; index=limit, limit+=8) {
220 for (; (vlc = svq3_get_ue_golomb (gb)) != 0; index++) {
221
222 if (vlc == INVALID_VLC)
223 return -1;
224
225 sign = (vlc & 0x1) - 1;
226 vlc = (vlc + 1) >> 1;
227
228 if (type == 3) {
229 if (vlc < 3) {
230 run = 0;
231 level = vlc;
232 } else if (vlc < 4) {
233 run = 1;
234 level = 1;
235 } else {
236 run = (vlc & 0x3);
237 level = ((vlc + 9) >> 2) - run;
238 }
239 } else {
240 if (vlc < 16) {
241 run = svq3_dct_tables[intra][vlc].run;
242 level = svq3_dct_tables[intra][vlc].level;
243 } else if (intra) {
244 run = (vlc & 0x7);
245 level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1)));
246 } else {
247 run = (vlc & 0xF);
248 level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0)));
249 }
250 }
251
252 if ((index += run) >= limit)
253 return -1;
254
255 block[scan[index]] = (level ^ sign) - sign;
256 }
257
258 if (type != 2) {
259 break;
260 }
261 }
262
263 return 0;
264}
265
da3b9756
MM
266static inline void svq3_mc_dir_part (MpegEncContext *s,
267 int x, int y, int width, int height,
268 int mx, int my, int dxy,
269 int thirdpel, int dir, int avg) {
270
271 const Picture *pic = (dir == 0) ? &s->last_picture : &s->next_picture;
8b82a956
MN
272 uint8_t *src, *dest;
273 int i, emu = 0;
669ac79c 274 int blocksize= 2 - (width>>3); //16->0, 8->1, 4->2
8b82a956 275
94d44f45
MN
276 mx += x;
277 my += y;
278
4c701ac8
MN
279 if (mx < 0 || mx >= (s->h_edge_pos - width - 1) ||
280 my < 0 || my >= (s->v_edge_pos - height - 1)) {
8b82a956
MN
281
282 if ((s->flags & CODEC_FLAG_EMU_EDGE)) {
283 emu = 1;
284 }
285
4c701ac8
MN
286 mx = clip (mx, -16, (s->h_edge_pos - width + 15));
287 my = clip (my, -16, (s->v_edge_pos - height + 15));
8b82a956
MN
288 }
289
290 /* form component predictions */
291 dest = s->current_picture.data[0] + x + y*s->linesize;
da3b9756 292 src = pic->data[0] + mx + my*s->linesize;
8b82a956
MN
293
294 if (emu) {
a7d3e772 295 ff_emulated_edge_mc (s->edge_emu_buffer, src, s->linesize, (width + 1), (height + 1),
4c701ac8 296 mx, my, s->h_edge_pos, s->v_edge_pos);
8b82a956
MN
297 src = s->edge_emu_buffer;
298 }
669ac79c 299 if(thirdpel)
da3b9756 300 (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->linesize, width, height);
669ac79c 301 else
da3b9756 302 (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->linesize, height);
8b82a956
MN
303
304 if (!(s->flags & CODEC_FLAG_GRAY)) {
305 mx = (mx + (mx < (int) x)) >> 1;
306 my = (my + (my < (int) y)) >> 1;
307 width = (width >> 1);
308 height = (height >> 1);
669ac79c 309 blocksize++;
8b82a956
MN
310
311 for (i=1; i < 3; i++) {
312 dest = s->current_picture.data[i] + (x >> 1) + (y >> 1)*s->uvlinesize;
da3b9756 313 src = pic->data[i] + mx + my*s->uvlinesize;
8b82a956
MN
314
315 if (emu) {
a7d3e772 316 ff_emulated_edge_mc (s->edge_emu_buffer, src, s->uvlinesize, (width + 1), (height + 1),
4c701ac8 317 mx, my, (s->h_edge_pos >> 1), (s->v_edge_pos >> 1));
a7d3e772 318 src = s->edge_emu_buffer;
8b82a956 319 }
669ac79c 320 if(thirdpel)
da3b9756 321 (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->uvlinesize, width, height);
669ac79c 322 else
da3b9756 323 (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->uvlinesize, height);
8b82a956
MN
324 }
325 }
326}
327
2e26c8d2
MM
328static inline int svq3_mc_dir (H264Context *h, int size, int mode, int dir, int avg) {
329
330 int i, j, k, mx, my, dx, dy, x, y;
331 MpegEncContext *const s = (MpegEncContext *) h;
332 const int part_width = ((size & 5) == 4) ? 4 : 16 >> (size & 1);
333 const int part_height = 16 >> ((unsigned) (size + 1) / 3);
334 const int extra_width = (mode == PREDICT_MODE) ? -16*6 : 0;
335 const int h_edge_pos = 6*(s->h_edge_pos - part_width ) - extra_width;
336 const int v_edge_pos = 6*(s->v_edge_pos - part_height) - extra_width;
337
338 for (i=0; i < 16; i+=part_height) {
339 for (j=0; j < 16; j+=part_width) {
340 const int b_xy = (4*s->mb_x+(j>>2)) + (4*s->mb_y+(i>>2))*h->b_stride;
341 int dxy;
342 x = 16*s->mb_x + j;
343 y = 16*s->mb_y + i;
344 k = ((j>>2)&1) + ((i>>1)&2) + ((j>>1)&4) + (i&8);
345
346 if (mode != PREDICT_MODE) {
347 pred_motion (h, k, (part_width >> 2), dir, 1, &mx, &my);
348 } else {
349 mx = s->next_picture.motion_val[0][b_xy][0]<<1;
350 my = s->next_picture.motion_val[0][b_xy][1]<<1;
351
352 if (dir == 0) {
353 mx = ((mx * h->frame_num_offset) / h->prev_frame_num_offset + 1)>>1;
354 my = ((my * h->frame_num_offset) / h->prev_frame_num_offset + 1)>>1;
355 } else {
356 mx = ((mx * (h->frame_num_offset - h->prev_frame_num_offset)) / h->prev_frame_num_offset + 1)>>1;
357 my = ((my * (h->frame_num_offset - h->prev_frame_num_offset)) / h->prev_frame_num_offset + 1)>>1;
358 }
359 }
360
361 /* clip motion vector prediction to frame border */
362 mx = clip (mx, extra_width - 6*x, h_edge_pos - 6*x);
363 my = clip (my, extra_width - 6*y, v_edge_pos - 6*y);
364
365 /* get (optional) motion vector differential */
366 if (mode == PREDICT_MODE) {
367 dx = dy = 0;
368 } else {
369 dy = svq3_get_se_golomb (&s->gb);
370 dx = svq3_get_se_golomb (&s->gb);
371
372 if (dx == INVALID_VLC || dy == INVALID_VLC) {
373 return -1;
374 }
375 }
376
377 /* compute motion vector */
378 if (mode == THIRDPEL_MODE) {
379 int fx, fy;
380 mx = ((mx + 1)>>1) + dx;
381 my = ((my + 1)>>1) + dy;
382 fx= ((unsigned)(mx + 0x3000))/3 - 0x1000;
383 fy= ((unsigned)(my + 0x3000))/3 - 0x1000;
384 dxy= (mx - 3*fx) + 4*(my - 3*fy);
385
386 svq3_mc_dir_part (s, x, y, part_width, part_height, fx, fy, dxy, 1, dir, avg);
387 mx += mx;
388 my += my;
389 } else if (mode == HALFPEL_MODE || mode == PREDICT_MODE) {
390 mx = ((unsigned)(mx + 1 + 0x3000))/3 + dx - 0x1000;
391 my = ((unsigned)(my + 1 + 0x3000))/3 + dy - 0x1000;
392 dxy= (mx&1) + 2*(my&1);
393
394 svq3_mc_dir_part (s, x, y, part_width, part_height, mx>>1, my>>1, dxy, 0, dir, avg);
395 mx *= 3;
396 my *= 3;
397 } else {
398 mx = ((unsigned)(mx + 3 + 0x6000))/6 + dx - 0x1000;
399 my = ((unsigned)(my + 3 + 0x6000))/6 + dy - 0x1000;
400
401 svq3_mc_dir_part (s, x, y, part_width, part_height, mx, my, 0, 0, dir, avg);
402 mx *= 6;
403 my *= 6;
404 }
405
406 /* update mv_cache */
407 if (mode != PREDICT_MODE) {
408 int32_t mv = pack16to32(mx,my);
409
410 if (part_height == 8 && i < 8) {
411 *(int32_t *) h->mv_cache[dir][scan8[k] + 1*8] = mv;
412
413 if (part_width == 8 && j < 8) {
414 *(int32_t *) h->mv_cache[dir][scan8[k] + 1 + 1*8] = mv;
415 }
416 }
417 if (part_width == 8 && j < 8) {
418 *(int32_t *) h->mv_cache[dir][scan8[k] + 1] = mv;
419 }
420 if (part_width == 4 || part_height == 4) {
421 *(int32_t *) h->mv_cache[dir][scan8[k]] = mv;
422 }
423 }
424
425 /* write back motion vectors */
426 fill_rectangle(s->current_picture.motion_val[dir][b_xy], part_width>>2, part_height>>2, h->b_stride, pack16to32(mx,my), 4);
427 }
428 }
429
430 return 0;
431}
432
8b82a956 433static int svq3_decode_mb (H264Context *h, unsigned int mb_type) {
2e26c8d2
MM
434 int i, j, k, m, dir, mode;
435 int cbp = 0;
8b82a956
MN
436 uint32_t vlc;
437 int8_t *top, *left;
438 MpegEncContext *const s = (MpegEncContext *) h;
439 const int mb_xy = s->mb_x + s->mb_y*s->mb_stride;
440 const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
441
442 h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
443 h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
444 h->topright_samples_available = 0xFFFF;
445
446 if (mb_type == 0) { /* SKIP */
2e26c8d2 447 if (s->pict_type == P_TYPE || s->next_picture.mb_type[mb_xy] == -1) {
da3b9756
MM
448 svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 0, 0);
449
2e26c8d2
MM
450 if (s->pict_type == B_TYPE) {
451 svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 1, 1);
da3b9756 452 }
8b82a956 453
2e26c8d2
MM
454 mb_type = MB_TYPE_SKIP;
455 } else {
6258c7e6
MN
456 mb_type= FFMIN(s->next_picture.mb_type[mb_xy], 0);
457 svq3_mc_dir (h, mb_type, PREDICT_MODE, 0, 0);
458 svq3_mc_dir (h, mb_type, PREDICT_MODE, 1, 1);
da3b9756 459
da3b9756
MM
460 mb_type = MB_TYPE_16x16;
461 }
8b82a956
MN
462 } else if (mb_type < 8) { /* INTER */
463 if (h->thirdpel_flag && h->halfpel_flag == !get_bits (&s->gb, 1)) {
94d44f45 464 mode = THIRDPEL_MODE;
8b82a956 465 } else if (h->halfpel_flag && h->thirdpel_flag == !get_bits (&s->gb, 1)) {
94d44f45 466 mode = HALFPEL_MODE;
8b82a956 467 } else {
94d44f45 468 mode = FULLPEL_MODE;
8b82a956
MN
469 }
470
471 /* fill caches */
da3b9756 472 /* note ref_cache should contain here:
f7a8c179
MN
473 ????????
474 ???11111
475 N??11111
476 N??11111
477 N??11111
478 N
479 */
480
da3b9756
MM
481 for (m=0; m < 2; m++) {
482 if (s->mb_x > 0 && h->intra4x4_pred_mode[mb_xy - 1][0] != -1) {
483 for (i=0; i < 4; i++) {
484 *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - 1 + i*h->b_stride];
485 }
486 } else {
487 for (i=0; i < 4; i++) {
488 *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = 0;
489 }
8b82a956 490 }
da3b9756
MM
491 if (s->mb_y > 0) {
492 memcpy (h->mv_cache[m][scan8[0] - 1*8], s->current_picture.motion_val[m][b_xy - h->b_stride], 4*2*sizeof(int16_t));
493 memset (&h->ref_cache[m][scan8[0] - 1*8], (h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1, 4);
494
495 if (s->mb_x < (s->mb_width - 1)) {
496 *(uint32_t *) h->mv_cache[m][scan8[0] + 4 - 1*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - h->b_stride + 4];
497 h->ref_cache[m][scan8[0] + 4 - 1*8] =
498 (h->intra4x4_pred_mode[mb_xy - s->mb_stride + 1][0] == -1 ||
499 h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1;
500 }else
501 h->ref_cache[m][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE;
502 if (s->mb_x > 0) {
2e26c8d2 503 *(uint32_t *) h->mv_cache[m][scan8[0] - 1 - 1*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - h->b_stride - 1];
da3b9756
MM
504 h->ref_cache[m][scan8[0] - 1 - 1*8] = (h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] == -1) ? PART_NOT_AVAILABLE : 1;
505 }else
506 h->ref_cache[m][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE;
f7a8c179 507 }else
da3b9756
MM
508 memset (&h->ref_cache[m][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8);
509
510 if (s->pict_type != B_TYPE)
511 break;
512 }
8b82a956
MN
513
514 /* decode motion vector(s) and form prediction(s) */
da3b9756 515 if (s->pict_type == P_TYPE) {
2e26c8d2 516 svq3_mc_dir (h, (mb_type - 1), mode, 0, 0);
da3b9756 517 } else { /* B_TYPE */
2e26c8d2
MM
518 if (mb_type != 2) {
519 svq3_mc_dir (h, 0, mode, 0, 0);
520 } else {
521 for (i=0; i < 4; i++) {
522 memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
8b82a956 523 }
da3b9756 524 }
da3b9756 525 if (mb_type != 1) {
2e26c8d2 526 svq3_mc_dir (h, 0, mode, 1, (mb_type == 3));
da3b9756
MM
527 } else {
528 for (i=0; i < 4; i++) {
529 memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
530 }
531 }
8b82a956
MN
532 }
533
8b82a956 534 mb_type = MB_TYPE_16x16;
da3b9756 535 } else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */
8b82a956
MN
536 memset (h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t));
537
da3b9756
MM
538 if (mb_type == 8) {
539 if (s->mb_x > 0) {
540 for (i=0; i < 4; i++) {
541 h->intra4x4_pred_mode_cache[scan8[0] - 1 + i*8] = h->intra4x4_pred_mode[mb_xy - 1][i];
542 }
543 if (h->intra4x4_pred_mode_cache[scan8[0] - 1] == -1) {
544 h->left_samples_available = 0x5F5F;
545 }
546 }
547 if (s->mb_y > 0) {
548 h->intra4x4_pred_mode_cache[4+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][4];
549 h->intra4x4_pred_mode_cache[5+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][5];
550 h->intra4x4_pred_mode_cache[6+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][6];
551 h->intra4x4_pred_mode_cache[7+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][3];
552
553 if (h->intra4x4_pred_mode_cache[4+8*0] == -1) {
554 h->top_samples_available = 0x33FF;
555 }
8b82a956 556 }
8b82a956 557
da3b9756
MM
558 /* decode prediction codes for luma blocks */
559 for (i=0; i < 16; i+=2) {
560 vlc = svq3_get_ue_golomb (&s->gb);
8b82a956 561
da3b9756
MM
562 if (vlc >= 25)
563 return -1;
8b82a956 564
da3b9756
MM
565 left = &h->intra4x4_pred_mode_cache[scan8[i] - 1];
566 top = &h->intra4x4_pred_mode_cache[scan8[i] - 8];
8b82a956 567
da3b9756
MM
568 left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]];
569 left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]];
8b82a956 570
da3b9756
MM
571 if (left[1] == -1 || left[2] == -1)
572 return -1;
573 }
2e26c8d2 574 } else { /* mb_type == 33, DC_128_PRED block type */
da3b9756
MM
575 for (i=0; i < 4; i++) {
576 memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_PRED, 4);
577 }
8b82a956
MN
578 }
579
580 write_back_intra_pred_mode (h);
da3b9756
MM
581
582 if (mb_type == 8) {
583 check_intra4x4_pred_mode (h);
584
585 h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
586 h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
587 } else {
588 for (i=0; i < 4; i++) {
589 memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_128_PRED, 4);
590 }
591
592 h->top_samples_available = 0x33FF;
593 h->left_samples_available = 0x5F5F;
594 }
8b82a956 595
8b82a956
MN
596 mb_type = MB_TYPE_INTRA4x4;
597 } else { /* INTRA16x16 */
598 dir = i_mb_type_info[mb_type - 8].pred_mode;
599 dir = (dir >> 1) ^ 3*(dir & 1) ^ 1;
600
601 if ((h->intra16x16_pred_mode = check_intra_pred_mode (h, dir)) == -1)
602 return -1;
603
604 cbp = i_mb_type_info[mb_type - 8].cbp;
605 mb_type = MB_TYPE_INTRA16x16;
606 }
607
608 if (!IS_INTER(mb_type) && s->pict_type != I_TYPE) {
609 for (i=0; i < 4; i++) {
610 memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
611 }
da3b9756
MM
612 if (s->pict_type == B_TYPE) {
613 for (i=0; i < 4; i++) {
614 memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
615 }
616 }
8b82a956
MN
617 }
618 if (!IS_INTRA4x4(mb_type)) {
619 memset (h->intra4x4_pred_mode[mb_xy], DC_PRED, 8);
620 }
2e26c8d2 621 if (!IS_SKIP(mb_type) || s->pict_type == B_TYPE) {
f7a8c179
MN
622 memset (h->non_zero_count_cache + 8, 0, 4*9*sizeof(uint8_t));
623 s->dsp.clear_blocks(h->mb);
8b82a956
MN
624 }
625
2e26c8d2
MM
626 if (!IS_INTRA16x16(mb_type) && (!IS_SKIP(mb_type) || s->pict_type == B_TYPE)) {
627 if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48)
628 return -1;
629
630 cbp = IS_INTRA(mb_type) ? golomb_to_intra4x4_cbp[vlc] : golomb_to_inter_cbp[vlc];
631 }
8b82a956
MN
632 if (IS_INTRA16x16(mb_type) || (s->pict_type != I_TYPE && s->adaptive_quant && cbp)) {
633 s->qscale += svq3_get_se_golomb (&s->gb);
634
635 if (s->qscale > 31)
636 return -1;
637 }
638 if (IS_INTRA16x16(mb_type)) {
639 if (svq3_decode_block (&s->gb, h->mb, 0, 0))
640 return -1;
641 }
642
2e26c8d2
MM
643 if (cbp) {
644 const int index = IS_INTRA16x16(mb_type) ? 1 : 0;
645 const int type = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1);
8b82a956
MN
646
647 for (i=0; i < 4; i++) {
648 if ((cbp & (1 << i))) {
649 for (j=0; j < 4; j++) {
2e26c8d2 650 k = index ? ((j&1) + 2*(i&1) + 2*(j&2) + 4*(i&2)) : (4*i + j);
8b82a956
MN
651 h->non_zero_count_cache[ scan8[k] ] = 1;
652
2e26c8d2 653 if (svq3_decode_block (&s->gb, &h->mb[16*k], index, type))
8b82a956
MN
654 return -1;
655 }
656 }
657 }
658
659 if ((cbp & 0x30)) {
660 for (i=0; i < 2; ++i) {
661 if (svq3_decode_block (&s->gb, &h->mb[16*(16 + 4*i)], 0, 3))
662 return -1;
663 }
664
665 if ((cbp & 0x20)) {
666 for (i=0; i < 8; i++) {
667 h->non_zero_count_cache[ scan8[16+i] ] = 1;
668
669 if (svq3_decode_block (&s->gb, &h->mb[16*(16 + i)], 1, 1))
670 return -1;
671 }
672 }
673 }
674 }
675
676 s->current_picture.mb_type[mb_xy] = mb_type;
677
678 if (IS_INTRA(mb_type)) {
679 h->chroma_pred_mode = check_intra_pred_mode (h, DC_PRED8x8);
680 }
681
682 return 0;
683}
684
da3b9756
MM
685static int svq3_decode_slice_header (H264Context *h) {
686 MpegEncContext *const s = (MpegEncContext *) h;
687 const int mb_xy = s->mb_x + s->mb_y*s->mb_stride;
688 int i, header;
689
690 header = get_bits (&s->gb, 8);
691
692 if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) {
693 /* TODO: what? */
9b879566 694 av_log(h->s.avctx, AV_LOG_ERROR, "unsupported slice header (%02X)\n", header);
da3b9756
MM
695 return -1;
696 } else {
697 int length = (header >> 5) & 3;
698
699 h->next_slice_index = s->gb.index + 8*show_bits (&s->gb, 8*length) + 8*length;
700
303e50e6
MN
701 if (h->next_slice_index > s->gb.size_in_bits){
702 av_log(h->s.avctx, AV_LOG_ERROR, "slice after bitstream end\n");
da3b9756 703 return -1;
303e50e6 704 }
da3b9756
MM
705
706 s->gb.size_in_bits = h->next_slice_index - 8*(length - 1);
707 s->gb.index += 8;
708
709 if (length > 0) {
710 memcpy ((uint8_t *) &s->gb.buffer[s->gb.index >> 3],
711 &s->gb.buffer[s->gb.size_in_bits >> 3], (length - 1));
712 }
713 }
714
303e50e6
MN
715 if ((i = svq3_get_ue_golomb (&s->gb)) == INVALID_VLC || i >= 3){
716 av_log(h->s.avctx, AV_LOG_ERROR, "illegal slice type %d \n", i);
da3b9756 717 return -1;
303e50e6 718 }
da3b9756
MM
719
720 h->slice_type = golomb_to_pict_type[i];
721
722 if ((header & 0x9F) == 2) {
723 i = (s->mb_num < 64) ? 6 : (1 + av_log2 (s->mb_num - 1));
724 s->mb_skip_run = get_bits (&s->gb, i) - (s->mb_x + (s->mb_y * s->mb_width));
725 } else {
726 get_bits1 (&s->gb);
727 s->mb_skip_run = 0;
728 }
729
730 h->slice_num = get_bits (&s->gb, 8);
731 s->qscale = get_bits (&s->gb, 5);
732 s->adaptive_quant = get_bits1 (&s->gb);
733
734 /* unknown fields */
735 get_bits1 (&s->gb);
736
737 if (h->unknown_svq3_flag) {
738 get_bits1 (&s->gb);
739 }
740
741 get_bits1 (&s->gb);
742 get_bits (&s->gb, 2);
743
744 while (get_bits1 (&s->gb)) {
745 get_bits (&s->gb, 8);
746 }
747
748 /* reset intra predictors and invalidate motion vector references */
749 if (s->mb_x > 0) {
750 memset (h->intra4x4_pred_mode[mb_xy - 1], -1, 4*sizeof(int8_t));
751 memset (h->intra4x4_pred_mode[mb_xy - s->mb_x], -1, 8*sizeof(int8_t)*s->mb_x);
752 }
753 if (s->mb_y > 0) {
754 memset (h->intra4x4_pred_mode[mb_xy - s->mb_stride], -1, 8*sizeof(int8_t)*(s->mb_width - s->mb_x));
755
756 if (s->mb_x > 0) {
757 h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] = -1;
758 }
759 }
760
761 return 0;
762}
763
8b82a956
MN
764static int svq3_decode_frame (AVCodecContext *avctx,
765 void *data, int *data_size,
766 uint8_t *buf, int buf_size) {
767 MpegEncContext *const s = avctx->priv_data;
768 H264Context *const h = avctx->priv_data;
da3b9756 769 int m, mb_type;
14284f78 770 unsigned char *extradata;
ebcd2f96 771 unsigned int size;
da3b9756 772
8b82a956 773 s->flags = avctx->flags;
303e50e6 774 s->flags2 = avctx->flags2;
4ff7c576
MM
775 s->unrestricted_mv = 1;
776
8b82a956 777 if (!s->context_initialized) {
4c701ac8
MN
778 s->width = avctx->width;
779 s->height = avctx->height;
8b82a956
MN
780 h->pred4x4[DIAG_DOWN_LEFT_PRED] = pred4x4_down_left_svq3_c;
781 h->pred16x16[PLANE_PRED8x8] = pred16x16_plane_svq3_c;
782 h->halfpel_flag = 1;
783 h->thirdpel_flag = 1;
da3b9756 784 h->unknown_svq3_flag = 0;
8b82a956
MN
785 h->chroma_qp = 4;
786
787 if (MPV_common_init (s) < 0)
788 return -1;
789
4c701ac8
MN
790 h->b_stride = 4*s->mb_width;
791
8b82a956 792 alloc_tables (h);
8b82a956 793
14284f78
MM
794 /* prowl for the "SEQH" marker in the extradata */
795 extradata = (unsigned char *)avctx->extradata;
796 for (m = 0; m < avctx->extradata_size; m++) {
797 if (!memcmp (extradata, "SEQH", 4))
798 break;
799 extradata++;
800 }
ebcd2f96 801
14284f78
MM
802 /* if a match was found, parse the extra data */
803 if (!memcmp (extradata, "SEQH", 4)) {
da3b9756
MM
804
805 GetBitContext gb;
8b82a956 806
ee59b4b6 807 size = BE_32(&extradata[4]);
ebcd2f96 808 init_get_bits (&gb, extradata + 8, size);
8b82a956 809
da3b9756
MM
810 /* 'frame size code' and optional 'width, height' */
811 if (get_bits (&gb, 3) == 7) {
812 get_bits (&gb, 12);
813 get_bits (&gb, 12);
8b82a956
MN
814 }
815
da3b9756
MM
816 h->halfpel_flag = get_bits1 (&gb);
817 h->thirdpel_flag = get_bits1 (&gb);
8b82a956 818
da3b9756
MM
819 /* unknown fields */
820 get_bits1 (&gb);
821 get_bits1 (&gb);
822 get_bits1 (&gb);
823 get_bits1 (&gb);
8b82a956 824
da3b9756 825 s->low_delay = get_bits1 (&gb);
8b82a956 826
da3b9756
MM
827 /* unknown field */
828 get_bits1 (&gb);
8b82a956 829
da3b9756
MM
830 while (get_bits1 (&gb)) {
831 get_bits (&gb, 8);
832 }
8b82a956 833
da3b9756
MM
834 h->unknown_svq3_flag = get_bits1 (&gb);
835 avctx->has_b_frames = !s->low_delay;
836 }
837 }
8b82a956 838
da3b9756
MM
839 /* special case for last picture */
840 if (buf_size == 0) {
841 if (s->next_picture_ptr && !s->low_delay) {
842 *(AVFrame *) data = *(AVFrame *) &s->next_picture;
843 *data_size = sizeof(AVFrame);
844 }
845 return 0;
846 }
8b82a956 847
da3b9756 848 init_get_bits (&s->gb, buf, 8*buf_size);
8b82a956 849
da3b9756 850 s->mb_x = s->mb_y = 0;
8b82a956 851
da3b9756
MM
852 if (svq3_decode_slice_header (h))
853 return -1;
8b82a956 854
da3b9756
MM
855 s->pict_type = h->slice_type;
856 s->picture_number = h->slice_num;
8b82a956 857
4704097a 858 if(avctx->debug&FF_DEBUG_PICT_INFO){
9b879566 859 av_log(h->s.avctx, AV_LOG_DEBUG, "%c hpel:%d, tpel:%d aqp:%d qp:%d\n",
d8085ea7 860 av_get_pict_type_char(s->pict_type), h->halfpel_flag, h->thirdpel_flag,
4704097a
MN
861 s->adaptive_quant, s->qscale
862 );
863 }
8b82a956 864
da3b9756
MM
865 /* for hurry_up==5 */
866 s->current_picture.pict_type = s->pict_type;
867 s->current_picture.key_frame = (s->pict_type == I_TYPE);
868
869 /* skip b frames if we dont have reference frames */
870 if (s->last_picture_ptr == NULL && s->pict_type == B_TYPE) return 0;
871 /* skip b frames if we are in a hurry */
872 if (avctx->hurry_up && s->pict_type == B_TYPE) return 0;
873 /* skip everything if we are in a hurry >= 5 */
874 if (avctx->hurry_up >= 5) return 0;
875
876 if (s->next_p_frame_damaged) {
877 if (s->pict_type == B_TYPE)
878 return 0;
879 else
880 s->next_p_frame_damaged = 0;
881 }
8b82a956
MN
882
883 frame_start (h);
884
da3b9756
MM
885 if (s->pict_type == B_TYPE) {
886 h->frame_num_offset = (h->slice_num - h->prev_frame_num);
887
888 if (h->frame_num_offset < 0) {
889 h->frame_num_offset += 256;
890 }
891 if (h->frame_num_offset == 0 || h->frame_num_offset >= h->prev_frame_num_offset) {
9b879566 892 av_log(h->s.avctx, AV_LOG_ERROR, "error in B-frame picture id\n");
da3b9756
MM
893 return -1;
894 }
895 } else {
896 h->prev_frame_num = h->frame_num;
897 h->frame_num = h->slice_num;
898 h->prev_frame_num_offset = (h->frame_num - h->prev_frame_num);
899
900 if (h->prev_frame_num_offset < 0) {
901 h->prev_frame_num_offset += 256;
902 }
903 }
904
905 for(m=0; m<2; m++){
906 int i;
907 for(i=0; i<4; i++){
908 int j;
909 for(j=-1; j<4; j++)
910 h->ref_cache[m][scan8[0] + 8*i + j]= 1;
911 h->ref_cache[m][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE;
912 }
f7a8c179
MN
913 }
914
8b82a956
MN
915 for (s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) {
916 for (s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
da3b9756
MM
917
918 if ( (s->gb.index + 7) >= s->gb.size_in_bits &&
919 ((s->gb.index & 7) == 0 || show_bits (&s->gb, (-s->gb.index & 7)) == 0)) {
920
921 s->gb.index = h->next_slice_index;
922 s->gb.size_in_bits = 8*buf_size;
923
924 if (svq3_decode_slice_header (h))
925 return -1;
926
927 /* TODO: support s->mb_skip_run */
928 }
929
930 mb_type = svq3_get_ue_golomb (&s->gb);
8b82a956
MN
931
932 if (s->pict_type == I_TYPE) {
933 mb_type += 8;
da3b9756
MM
934 } else if (s->pict_type == B_TYPE && mb_type >= 4) {
935 mb_type += 4;
8b82a956 936 }
da3b9756 937 if (mb_type > 33 || svq3_decode_mb (h, mb_type)) {
9b879566 938 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
8b82a956
MN
939 return -1;
940 }
941
942 if (mb_type != 0) {
943 hl_decode_mb (h);
944 }
2e26c8d2
MM
945
946 if (s->pict_type != B_TYPE && !s->low_delay) {
947 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
948 (s->pict_type == P_TYPE && mb_type < 8) ? (mb_type - 1) : -1;
949 }
8b82a956 950 }
4c701ac8
MN
951
952 ff_draw_horiz_band(s, 16*s->mb_y, 16);
8b82a956
MN
953 }
954
8b82a956 955 MPV_frame_end(s);
da3b9756
MM
956
957 if (s->pict_type == B_TYPE || s->low_delay) {
958 *(AVFrame *) data = *(AVFrame *) &s->current_picture;
959 } else {
960 *(AVFrame *) data = *(AVFrame *) &s->last_picture;
961 }
962
963 avctx->frame_number = s->picture_number - 1;
964
965 /* dont output the last pic after seeking */
966 if (s->last_picture_ptr || s->low_delay) {
967 *data_size = sizeof(AVFrame);
968 }
969
8b82a956
MN
970 return buf_size;
971}
972
973
974AVCodec svq3_decoder = {
975 "svq3",
976 CODEC_TYPE_VIDEO,
977 CODEC_ID_SVQ3,
978 sizeof(H264Context),
979 decode_init,
980 NULL,
981 decode_end,
982 svq3_decode_frame,
4c701ac8 983 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
8b82a956 984};