SVQ3 uses unrestricted motion vectors
[libav.git] / libavcodec / svq3.c
CommitLineData
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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#define FULLPEL_MODE 1
47#define HALFPEL_MODE 2
48#define THIRDPEL_MODE 3
2e26c8d2 49#define PREDICT_MODE 4
94d44f45 50
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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*/
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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}
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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
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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;
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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
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276 mx += x;
277 my += y;
278
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279 if (mx < 0 || mx >= (s->h_edge_pos - width - 1) ||
280 my < 0 || my >= (s->v_edge_pos - height - 1)) {
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281
282 if ((s->flags & CODEC_FLAG_EMU_EDGE)) {
283 emu = 1;
284 }
285
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286 mx = clip (mx, -16, (s->h_edge_pos - width + 15));
287 my = clip (my, -16, (s->v_edge_pos - height + 15));
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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;
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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);
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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);
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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++;
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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;
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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);
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324 }
325 }
326}
327
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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) {
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434 int i, j, k, m, dir, mode;
435 int cbp = 0;
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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) {
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448 svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 0, 0);
449
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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
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454 mb_type = MB_TYPE_SKIP;
455 } else {
456 svq3_mc_dir (h, s->next_picture.mb_type[mb_xy], PREDICT_MODE, 0, 0);
457 svq3_mc_dir (h, s->next_picture.mb_type[mb_xy], PREDICT_MODE, 1, 1);
da3b9756 458
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459 mb_type = MB_TYPE_16x16;
460 }
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461 } else if (mb_type < 8) { /* INTER */
462 if (h->thirdpel_flag && h->halfpel_flag == !get_bits (&s->gb, 1)) {
94d44f45 463 mode = THIRDPEL_MODE;
8b82a956 464 } else if (h->halfpel_flag && h->thirdpel_flag == !get_bits (&s->gb, 1)) {
94d44f45 465 mode = HALFPEL_MODE;
8b82a956 466 } else {
94d44f45 467 mode = FULLPEL_MODE;
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468 }
469
470 /* fill caches */
da3b9756 471 /* note ref_cache should contain here:
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472 ????????
473 ???11111
474 N??11111
475 N??11111
476 N??11111
477 N
478 */
479
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480 for (m=0; m < 2; m++) {
481 if (s->mb_x > 0 && h->intra4x4_pred_mode[mb_xy - 1][0] != -1) {
482 for (i=0; i < 4; i++) {
483 *(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];
484 }
485 } else {
486 for (i=0; i < 4; i++) {
487 *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = 0;
488 }
8b82a956 489 }
da3b9756
MM
490 if (s->mb_y > 0) {
491 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));
492 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);
493
494 if (s->mb_x < (s->mb_width - 1)) {
495 *(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];
496 h->ref_cache[m][scan8[0] + 4 - 1*8] =
497 (h->intra4x4_pred_mode[mb_xy - s->mb_stride + 1][0] == -1 ||
498 h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1;
499 }else
500 h->ref_cache[m][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE;
501 if (s->mb_x > 0) {
2e26c8d2 502 *(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
503 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;
504 }else
505 h->ref_cache[m][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE;
f7a8c179 506 }else
da3b9756
MM
507 memset (&h->ref_cache[m][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8);
508
509 if (s->pict_type != B_TYPE)
510 break;
511 }
8b82a956
MN
512
513 /* decode motion vector(s) and form prediction(s) */
da3b9756 514 if (s->pict_type == P_TYPE) {
2e26c8d2 515 svq3_mc_dir (h, (mb_type - 1), mode, 0, 0);
da3b9756 516 } else { /* B_TYPE */
2e26c8d2
MM
517 if (mb_type != 2) {
518 svq3_mc_dir (h, 0, mode, 0, 0);
519 } else {
520 for (i=0; i < 4; i++) {
521 memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
8b82a956 522 }
da3b9756 523 }
da3b9756 524 if (mb_type != 1) {
2e26c8d2 525 svq3_mc_dir (h, 0, mode, 1, (mb_type == 3));
da3b9756
MM
526 } else {
527 for (i=0; i < 4; i++) {
528 memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
529 }
530 }
8b82a956
MN
531 }
532
8b82a956 533 mb_type = MB_TYPE_16x16;
da3b9756 534 } else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */
8b82a956
MN
535 memset (h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t));
536
da3b9756
MM
537 if (mb_type == 8) {
538 if (s->mb_x > 0) {
539 for (i=0; i < 4; i++) {
540 h->intra4x4_pred_mode_cache[scan8[0] - 1 + i*8] = h->intra4x4_pred_mode[mb_xy - 1][i];
541 }
542 if (h->intra4x4_pred_mode_cache[scan8[0] - 1] == -1) {
543 h->left_samples_available = 0x5F5F;
544 }
545 }
546 if (s->mb_y > 0) {
547 h->intra4x4_pred_mode_cache[4+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][4];
548 h->intra4x4_pred_mode_cache[5+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][5];
549 h->intra4x4_pred_mode_cache[6+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][6];
550 h->intra4x4_pred_mode_cache[7+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][3];
551
552 if (h->intra4x4_pred_mode_cache[4+8*0] == -1) {
553 h->top_samples_available = 0x33FF;
554 }
8b82a956 555 }
8b82a956 556
da3b9756
MM
557 /* decode prediction codes for luma blocks */
558 for (i=0; i < 16; i+=2) {
559 vlc = svq3_get_ue_golomb (&s->gb);
8b82a956 560
da3b9756
MM
561 if (vlc >= 25)
562 return -1;
8b82a956 563
da3b9756
MM
564 left = &h->intra4x4_pred_mode_cache[scan8[i] - 1];
565 top = &h->intra4x4_pred_mode_cache[scan8[i] - 8];
8b82a956 566
da3b9756
MM
567 left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]];
568 left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]];
8b82a956 569
da3b9756
MM
570 if (left[1] == -1 || left[2] == -1)
571 return -1;
572 }
2e26c8d2 573 } else { /* mb_type == 33, DC_128_PRED block type */
da3b9756
MM
574 for (i=0; i < 4; i++) {
575 memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_PRED, 4);
576 }
8b82a956
MN
577 }
578
579 write_back_intra_pred_mode (h);
da3b9756
MM
580
581 if (mb_type == 8) {
582 check_intra4x4_pred_mode (h);
583
584 h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
585 h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
586 } else {
587 for (i=0; i < 4; i++) {
588 memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_128_PRED, 4);
589 }
590
591 h->top_samples_available = 0x33FF;
592 h->left_samples_available = 0x5F5F;
593 }
8b82a956 594
8b82a956
MN
595 mb_type = MB_TYPE_INTRA4x4;
596 } else { /* INTRA16x16 */
597 dir = i_mb_type_info[mb_type - 8].pred_mode;
598 dir = (dir >> 1) ^ 3*(dir & 1) ^ 1;
599
600 if ((h->intra16x16_pred_mode = check_intra_pred_mode (h, dir)) == -1)
601 return -1;
602
603 cbp = i_mb_type_info[mb_type - 8].cbp;
604 mb_type = MB_TYPE_INTRA16x16;
605 }
606
607 if (!IS_INTER(mb_type) && s->pict_type != I_TYPE) {
608 for (i=0; i < 4; i++) {
609 memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
610 }
da3b9756
MM
611 if (s->pict_type == B_TYPE) {
612 for (i=0; i < 4; i++) {
613 memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
614 }
615 }
8b82a956
MN
616 }
617 if (!IS_INTRA4x4(mb_type)) {
618 memset (h->intra4x4_pred_mode[mb_xy], DC_PRED, 8);
619 }
2e26c8d2 620 if (!IS_SKIP(mb_type) || s->pict_type == B_TYPE) {
f7a8c179
MN
621 memset (h->non_zero_count_cache + 8, 0, 4*9*sizeof(uint8_t));
622 s->dsp.clear_blocks(h->mb);
8b82a956
MN
623 }
624
2e26c8d2
MM
625 if (!IS_INTRA16x16(mb_type) && (!IS_SKIP(mb_type) || s->pict_type == B_TYPE)) {
626 if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48)
627 return -1;
628
629 cbp = IS_INTRA(mb_type) ? golomb_to_intra4x4_cbp[vlc] : golomb_to_inter_cbp[vlc];
630 }
8b82a956
MN
631 if (IS_INTRA16x16(mb_type) || (s->pict_type != I_TYPE && s->adaptive_quant && cbp)) {
632 s->qscale += svq3_get_se_golomb (&s->gb);
633
634 if (s->qscale > 31)
635 return -1;
636 }
637 if (IS_INTRA16x16(mb_type)) {
638 if (svq3_decode_block (&s->gb, h->mb, 0, 0))
639 return -1;
640 }
641
2e26c8d2
MM
642 if (cbp) {
643 const int index = IS_INTRA16x16(mb_type) ? 1 : 0;
644 const int type = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1);
8b82a956
MN
645
646 for (i=0; i < 4; i++) {
647 if ((cbp & (1 << i))) {
648 for (j=0; j < 4; j++) {
2e26c8d2 649 k = index ? ((j&1) + 2*(i&1) + 2*(j&2) + 4*(i&2)) : (4*i + j);
8b82a956
MN
650 h->non_zero_count_cache[ scan8[k] ] = 1;
651
2e26c8d2 652 if (svq3_decode_block (&s->gb, &h->mb[16*k], index, type))
8b82a956
MN
653 return -1;
654 }
655 }
656 }
657
658 if ((cbp & 0x30)) {
659 for (i=0; i < 2; ++i) {
660 if (svq3_decode_block (&s->gb, &h->mb[16*(16 + 4*i)], 0, 3))
661 return -1;
662 }
663
664 if ((cbp & 0x20)) {
665 for (i=0; i < 8; i++) {
666 h->non_zero_count_cache[ scan8[16+i] ] = 1;
667
668 if (svq3_decode_block (&s->gb, &h->mb[16*(16 + i)], 1, 1))
669 return -1;
670 }
671 }
672 }
673 }
674
675 s->current_picture.mb_type[mb_xy] = mb_type;
676
677 if (IS_INTRA(mb_type)) {
678 h->chroma_pred_mode = check_intra_pred_mode (h, DC_PRED8x8);
679 }
680
681 return 0;
682}
683
da3b9756
MM
684static int svq3_decode_slice_header (H264Context *h) {
685 MpegEncContext *const s = (MpegEncContext *) h;
686 const int mb_xy = s->mb_x + s->mb_y*s->mb_stride;
687 int i, header;
688
689 header = get_bits (&s->gb, 8);
690
691 if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) {
692 /* TODO: what? */
9b879566 693 av_log(h->s.avctx, AV_LOG_ERROR, "unsupported slice header (%02X)\n", header);
da3b9756
MM
694 return -1;
695 } else {
696 int length = (header >> 5) & 3;
697
698 h->next_slice_index = s->gb.index + 8*show_bits (&s->gb, 8*length) + 8*length;
699
700 if (h->next_slice_index > s->gb.size_in_bits)
701 return -1;
702
703 s->gb.size_in_bits = h->next_slice_index - 8*(length - 1);
704 s->gb.index += 8;
705
706 if (length > 0) {
707 memcpy ((uint8_t *) &s->gb.buffer[s->gb.index >> 3],
708 &s->gb.buffer[s->gb.size_in_bits >> 3], (length - 1));
709 }
710 }
711
712 if ((i = svq3_get_ue_golomb (&s->gb)) == INVALID_VLC || i >= 3)
713 return -1;
714
715 h->slice_type = golomb_to_pict_type[i];
716
717 if ((header & 0x9F) == 2) {
718 i = (s->mb_num < 64) ? 6 : (1 + av_log2 (s->mb_num - 1));
719 s->mb_skip_run = get_bits (&s->gb, i) - (s->mb_x + (s->mb_y * s->mb_width));
720 } else {
721 get_bits1 (&s->gb);
722 s->mb_skip_run = 0;
723 }
724
725 h->slice_num = get_bits (&s->gb, 8);
726 s->qscale = get_bits (&s->gb, 5);
727 s->adaptive_quant = get_bits1 (&s->gb);
728
729 /* unknown fields */
730 get_bits1 (&s->gb);
731
732 if (h->unknown_svq3_flag) {
733 get_bits1 (&s->gb);
734 }
735
736 get_bits1 (&s->gb);
737 get_bits (&s->gb, 2);
738
739 while (get_bits1 (&s->gb)) {
740 get_bits (&s->gb, 8);
741 }
742
743 /* reset intra predictors and invalidate motion vector references */
744 if (s->mb_x > 0) {
745 memset (h->intra4x4_pred_mode[mb_xy - 1], -1, 4*sizeof(int8_t));
746 memset (h->intra4x4_pred_mode[mb_xy - s->mb_x], -1, 8*sizeof(int8_t)*s->mb_x);
747 }
748 if (s->mb_y > 0) {
749 memset (h->intra4x4_pred_mode[mb_xy - s->mb_stride], -1, 8*sizeof(int8_t)*(s->mb_width - s->mb_x));
750
751 if (s->mb_x > 0) {
752 h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] = -1;
753 }
754 }
755
756 return 0;
757}
758
8b82a956
MN
759static int svq3_decode_frame (AVCodecContext *avctx,
760 void *data, int *data_size,
761 uint8_t *buf, int buf_size) {
762 MpegEncContext *const s = avctx->priv_data;
763 H264Context *const h = avctx->priv_data;
da3b9756
MM
764 int m, mb_type;
765
766 *data_size = 0;
8b82a956
MN
767
768 s->flags = avctx->flags;
4ff7c576
MM
769 s->unrestricted_mv = 1;
770
8b82a956 771 if (!s->context_initialized) {
4c701ac8
MN
772 s->width = avctx->width;
773 s->height = avctx->height;
8b82a956
MN
774 h->pred4x4[DIAG_DOWN_LEFT_PRED] = pred4x4_down_left_svq3_c;
775 h->pred16x16[PLANE_PRED8x8] = pred16x16_plane_svq3_c;
776 h->halfpel_flag = 1;
777 h->thirdpel_flag = 1;
da3b9756 778 h->unknown_svq3_flag = 0;
8b82a956
MN
779 h->chroma_qp = 4;
780
781 if (MPV_common_init (s) < 0)
782 return -1;
783
4c701ac8
MN
784 h->b_stride = 4*s->mb_width;
785
8b82a956 786 alloc_tables (h);
8b82a956 787
da3b9756
MM
788 if (avctx->extradata && avctx->extradata_size >= 0x64
789 && !memcmp (avctx->extradata, "SVQ3", 4)) {
790
791 GetBitContext gb;
8b82a956 792
da3b9756
MM
793 init_get_bits (&gb, (uint8_t *) avctx->extradata + 0x62,
794 8*(avctx->extradata_size - 0x62));
8b82a956 795
da3b9756
MM
796 /* 'frame size code' and optional 'width, height' */
797 if (get_bits (&gb, 3) == 7) {
798 get_bits (&gb, 12);
799 get_bits (&gb, 12);
8b82a956
MN
800 }
801
da3b9756
MM
802 h->halfpel_flag = get_bits1 (&gb);
803 h->thirdpel_flag = get_bits1 (&gb);
8b82a956 804
da3b9756
MM
805 /* unknown fields */
806 get_bits1 (&gb);
807 get_bits1 (&gb);
808 get_bits1 (&gb);
809 get_bits1 (&gb);
8b82a956 810
da3b9756 811 s->low_delay = get_bits1 (&gb);
8b82a956 812
da3b9756
MM
813 /* unknown field */
814 get_bits1 (&gb);
8b82a956 815
da3b9756
MM
816 while (get_bits1 (&gb)) {
817 get_bits (&gb, 8);
818 }
8b82a956 819
da3b9756
MM
820 h->unknown_svq3_flag = get_bits1 (&gb);
821 avctx->has_b_frames = !s->low_delay;
822 }
823 }
8b82a956 824
da3b9756
MM
825 /* special case for last picture */
826 if (buf_size == 0) {
827 if (s->next_picture_ptr && !s->low_delay) {
828 *(AVFrame *) data = *(AVFrame *) &s->next_picture;
829 *data_size = sizeof(AVFrame);
830 }
831 return 0;
832 }
8b82a956 833
da3b9756 834 init_get_bits (&s->gb, buf, 8*buf_size);
8b82a956 835
da3b9756 836 s->mb_x = s->mb_y = 0;
8b82a956 837
da3b9756
MM
838 if (svq3_decode_slice_header (h))
839 return -1;
8b82a956 840
da3b9756
MM
841 s->pict_type = h->slice_type;
842 s->picture_number = h->slice_num;
8b82a956 843
4704097a 844 if(avctx->debug&FF_DEBUG_PICT_INFO){
9b879566 845 av_log(h->s.avctx, AV_LOG_DEBUG, "%c hpel:%d, tpel:%d aqp:%d qp:%d\n",
d8085ea7 846 av_get_pict_type_char(s->pict_type), h->halfpel_flag, h->thirdpel_flag,
4704097a
MN
847 s->adaptive_quant, s->qscale
848 );
849 }
8b82a956 850
da3b9756
MM
851 /* for hurry_up==5 */
852 s->current_picture.pict_type = s->pict_type;
853 s->current_picture.key_frame = (s->pict_type == I_TYPE);
854
855 /* skip b frames if we dont have reference frames */
856 if (s->last_picture_ptr == NULL && s->pict_type == B_TYPE) return 0;
857 /* skip b frames if we are in a hurry */
858 if (avctx->hurry_up && s->pict_type == B_TYPE) return 0;
859 /* skip everything if we are in a hurry >= 5 */
860 if (avctx->hurry_up >= 5) return 0;
861
862 if (s->next_p_frame_damaged) {
863 if (s->pict_type == B_TYPE)
864 return 0;
865 else
866 s->next_p_frame_damaged = 0;
867 }
8b82a956
MN
868
869 frame_start (h);
870
da3b9756
MM
871 if (s->pict_type == B_TYPE) {
872 h->frame_num_offset = (h->slice_num - h->prev_frame_num);
873
874 if (h->frame_num_offset < 0) {
875 h->frame_num_offset += 256;
876 }
877 if (h->frame_num_offset == 0 || h->frame_num_offset >= h->prev_frame_num_offset) {
9b879566 878 av_log(h->s.avctx, AV_LOG_ERROR, "error in B-frame picture id\n");
da3b9756
MM
879 return -1;
880 }
881 } else {
882 h->prev_frame_num = h->frame_num;
883 h->frame_num = h->slice_num;
884 h->prev_frame_num_offset = (h->frame_num - h->prev_frame_num);
885
886 if (h->prev_frame_num_offset < 0) {
887 h->prev_frame_num_offset += 256;
888 }
889 }
890
891 for(m=0; m<2; m++){
892 int i;
893 for(i=0; i<4; i++){
894 int j;
895 for(j=-1; j<4; j++)
896 h->ref_cache[m][scan8[0] + 8*i + j]= 1;
897 h->ref_cache[m][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE;
898 }
f7a8c179
MN
899 }
900
8b82a956
MN
901 for (s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) {
902 for (s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
da3b9756
MM
903
904 if ( (s->gb.index + 7) >= s->gb.size_in_bits &&
905 ((s->gb.index & 7) == 0 || show_bits (&s->gb, (-s->gb.index & 7)) == 0)) {
906
907 s->gb.index = h->next_slice_index;
908 s->gb.size_in_bits = 8*buf_size;
909
910 if (svq3_decode_slice_header (h))
911 return -1;
912
913 /* TODO: support s->mb_skip_run */
914 }
915
916 mb_type = svq3_get_ue_golomb (&s->gb);
8b82a956
MN
917
918 if (s->pict_type == I_TYPE) {
919 mb_type += 8;
da3b9756
MM
920 } else if (s->pict_type == B_TYPE && mb_type >= 4) {
921 mb_type += 4;
8b82a956 922 }
da3b9756 923 if (mb_type > 33 || svq3_decode_mb (h, mb_type)) {
9b879566 924 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
8b82a956
MN
925 return -1;
926 }
927
928 if (mb_type != 0) {
929 hl_decode_mb (h);
930 }
2e26c8d2
MM
931
932 if (s->pict_type != B_TYPE && !s->low_delay) {
933 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
934 (s->pict_type == P_TYPE && mb_type < 8) ? (mb_type - 1) : -1;
935 }
8b82a956 936 }
4c701ac8
MN
937
938 ff_draw_horiz_band(s, 16*s->mb_y, 16);
8b82a956
MN
939 }
940
8b82a956 941 MPV_frame_end(s);
da3b9756
MM
942
943 if (s->pict_type == B_TYPE || s->low_delay) {
944 *(AVFrame *) data = *(AVFrame *) &s->current_picture;
945 } else {
946 *(AVFrame *) data = *(AVFrame *) &s->last_picture;
947 }
948
949 avctx->frame_number = s->picture_number - 1;
950
951 /* dont output the last pic after seeking */
952 if (s->last_picture_ptr || s->low_delay) {
953 *data_size = sizeof(AVFrame);
954 }
955
8b82a956
MN
956 return buf_size;
957}
958
959
960AVCodec svq3_decoder = {
961 "svq3",
962 CODEC_TYPE_VIDEO,
963 CODEC_ID_SVQ3,
964 sizeof(H264Context),
965 decode_init,
966 NULL,
967 decode_end,
968 svq3_decode_frame,
4c701ac8 969 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
8b82a956 970};