2 * Copyright (c) 2003 The FFmpeg Project.
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.
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.
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
19 * How to use this decoder:
20 * SVQ3 data is transported within Apple Quicktime files. Quicktime files
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
27 * via the AVCodecContext's extradata[_size] field:
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)
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
46 #define FULLPEL_MODE 1
47 #define HALFPEL_MODE 2
48 #define THIRDPEL_MODE 3
49 #define PREDICT_MODE 4
51 /* dual scan (from some older h264 draft)
60 static 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,
67 static const uint8_t svq3_pred_0[25][2] = {
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 },
79 static 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 } },
94 static 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 } }
101 static 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
109 static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp){
110 const int qmul= svq3_dequant_coeff[qp];
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};
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];
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];
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;
145 static void svq3_add_idct_c (uint8_t *dst, DCTELEM *block, int stride, int qp, int dc){
146 const int qmul= svq3_dequant_coeff[qp];
148 uint8_t *cm = cropTbl + MAX_NEG_CROP;
151 dc = 13*13*((dc == 1) ? 1538*block[0] : ((qmul*(block[0] >> 3)) / 2));
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];
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;
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);
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) ];
181 static void pred4x4_down_left_svq3_c(uint8_t *src, uint8_t *topright, int stride){
184 const __attribute__((unused)) int unu0= t0;
185 const __attribute__((unused)) int unu1= l0;
187 src[0+0*stride]=(l1 + t1)>>1;
189 src[0+1*stride]=(l2 + t2)>>1;
202 src[3+3*stride]=(l3 + t3)>>1;
205 static void pred16x16_plane_svq3_c(uint8_t *src, int stride){
206 pred16x16_plane_compat_c(src, stride, 1);
209 static inline int svq3_decode_block (GetBitContext *gb, DCTELEM *block,
210 int index, const int type) {
212 static const uint8_t *const scan_patterns[4] =
213 { luma_dc_zigzag_scan, zigzag_scan, svq3_scan, chroma_dc_scan };
215 int run, level, sign, vlc, limit;
216 const int intra = (3 * type) >> 2;
217 const uint8_t *const scan = scan_patterns[type];
219 for (limit=(16 >> intra); index < 16; index=limit, limit+=8) {
220 for (; (vlc = svq3_get_ue_golomb (gb)) != 0; index++) {
222 if (vlc == INVALID_VLC)
225 sign = (vlc & 0x1) - 1;
226 vlc = (vlc + 1) >> 1;
232 } else if (vlc < 4) {
237 level = ((vlc + 9) >> 2) - run;
241 run = svq3_dct_tables[intra][vlc].run;
242 level = svq3_dct_tables[intra][vlc].level;
245 level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1)));
248 level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0)));
252 if ((index += run) >= limit)
255 block[scan[index]] = (level ^ sign) - sign;
266 static 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) {
271 const Picture *pic = (dir == 0) ? &s->last_picture : &s->next_picture;
274 int blocksize= 2 - (width>>3); //16->0, 8->1, 4->2
279 if (mx < 0 || mx >= (s->h_edge_pos - width - 1) ||
280 my < 0 || my >= (s->v_edge_pos - height - 1)) {
282 if ((s->flags & CODEC_FLAG_EMU_EDGE)) {
286 mx = clip (mx, -16, (s->h_edge_pos - width + 15));
287 my = clip (my, -16, (s->v_edge_pos - height + 15));
290 /* form component predictions */
291 dest = s->current_picture.data[0] + x + y*s->linesize;
292 src = pic->data[0] + mx + my*s->linesize;
295 ff_emulated_edge_mc (s->edge_emu_buffer, src, s->linesize, (width + 1), (height + 1),
296 mx, my, s->h_edge_pos, s->v_edge_pos);
297 src = s->edge_emu_buffer;
300 (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->linesize, width, height);
302 (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->linesize, height);
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);
311 for (i=1; i < 3; i++) {
312 dest = s->current_picture.data[i] + (x >> 1) + (y >> 1)*s->uvlinesize;
313 src = pic->data[i] + mx + my*s->uvlinesize;
316 ff_emulated_edge_mc (s->edge_emu_buffer, src, s->uvlinesize, (width + 1), (height + 1),
317 mx, my, (s->h_edge_pos >> 1), (s->v_edge_pos >> 1));
318 src = s->edge_emu_buffer;
321 (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->uvlinesize, width, height);
323 (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->uvlinesize, height);
328 static inline int svq3_mc_dir (H264Context *h, int size, int mode, int dir, int avg) {
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;
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;
344 k = ((j>>2)&1) + ((i>>1)&2) + ((j>>1)&4) + (i&8);
346 if (mode != PREDICT_MODE) {
347 pred_motion (h, k, (part_width >> 2), dir, 1, &mx, &my);
349 mx = s->next_picture.motion_val[0][b_xy][0]<<1;
350 my = s->next_picture.motion_val[0][b_xy][1]<<1;
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;
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;
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);
365 /* get (optional) motion vector differential */
366 if (mode == PREDICT_MODE) {
369 dy = svq3_get_se_golomb (&s->gb);
370 dx = svq3_get_se_golomb (&s->gb);
372 if (dx == INVALID_VLC || dy == INVALID_VLC) {
377 /* compute motion vector */
378 if (mode == THIRDPEL_MODE) {
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);
386 svq3_mc_dir_part (s, x, y, part_width, part_height, fx, fy, dxy, 1, dir, avg);
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);
394 svq3_mc_dir_part (s, x, y, part_width, part_height, mx>>1, my>>1, dxy, 0, dir, avg);
398 mx = ((unsigned)(mx + 3 + 0x6000))/6 + dx - 0x1000;
399 my = ((unsigned)(my + 3 + 0x6000))/6 + dy - 0x1000;
401 svq3_mc_dir_part (s, x, y, part_width, part_height, mx, my, 0, 0, dir, avg);
406 /* update mv_cache */
407 if (mode != PREDICT_MODE) {
408 int32_t mv = pack16to32(mx,my);
410 if (part_height == 8 && i < 8) {
411 *(int32_t *) h->mv_cache[dir][scan8[k] + 1*8] = mv;
413 if (part_width == 8 && j < 8) {
414 *(int32_t *) h->mv_cache[dir][scan8[k] + 1 + 1*8] = mv;
417 if (part_width == 8 && j < 8) {
418 *(int32_t *) h->mv_cache[dir][scan8[k] + 1] = mv;
420 if (part_width == 4 || part_height == 4) {
421 *(int32_t *) h->mv_cache[dir][scan8[k]] = mv;
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);
433 static int svq3_decode_mb (H264Context *h, unsigned int mb_type) {
434 int i, j, k, m, dir, mode;
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;
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;
446 if (mb_type == 0) { /* SKIP */
447 if (s->pict_type == P_TYPE || s->next_picture.mb_type[mb_xy] == -1) {
448 svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 0, 0);
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);
454 mb_type = MB_TYPE_SKIP;
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);
459 mb_type = MB_TYPE_16x16;
461 } else if (mb_type < 8) { /* INTER */
462 if (h->thirdpel_flag && h->halfpel_flag == !get_bits (&s->gb, 1)) {
463 mode = THIRDPEL_MODE;
464 } else if (h->halfpel_flag && h->thirdpel_flag == !get_bits (&s->gb, 1)) {
471 /* note ref_cache should contain here:
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];
486 for (i=0; i < 4; i++) {
487 *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = 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);
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;
500 h->ref_cache[m][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE;
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];
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;
505 h->ref_cache[m][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE;
507 memset (&h->ref_cache[m][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8);
509 if (s->pict_type != B_TYPE)
513 /* decode motion vector(s) and form prediction(s) */
514 if (s->pict_type == P_TYPE) {
515 svq3_mc_dir (h, (mb_type - 1), mode, 0, 0);
516 } else { /* B_TYPE */
518 svq3_mc_dir (h, 0, mode, 0, 0);
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));
525 svq3_mc_dir (h, 0, mode, 1, (mb_type == 3));
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));
533 mb_type = MB_TYPE_16x16;
534 } else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */
535 memset (h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t));
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];
542 if (h->intra4x4_pred_mode_cache[scan8[0] - 1] == -1) {
543 h->left_samples_available = 0x5F5F;
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];
552 if (h->intra4x4_pred_mode_cache[4+8*0] == -1) {
553 h->top_samples_available = 0x33FF;
557 /* decode prediction codes for luma blocks */
558 for (i=0; i < 16; i+=2) {
559 vlc = svq3_get_ue_golomb (&s->gb);
564 left = &h->intra4x4_pred_mode_cache[scan8[i] - 1];
565 top = &h->intra4x4_pred_mode_cache[scan8[i] - 8];
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]];
570 if (left[1] == -1 || left[2] == -1)
573 } else { /* mb_type == 33, DC_128_PRED block type */
574 for (i=0; i < 4; i++) {
575 memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_PRED, 4);
579 write_back_intra_pred_mode (h);
582 check_intra4x4_pred_mode (h);
584 h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
585 h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
587 for (i=0; i < 4; i++) {
588 memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_128_PRED, 4);
591 h->top_samples_available = 0x33FF;
592 h->left_samples_available = 0x5F5F;
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;
600 if ((h->intra16x16_pred_mode = check_intra_pred_mode (h, dir)) == -1)
603 cbp = i_mb_type_info[mb_type - 8].cbp;
604 mb_type = MB_TYPE_INTRA16x16;
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));
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));
617 if (!IS_INTRA4x4(mb_type)) {
618 memset (h->intra4x4_pred_mode[mb_xy], DC_PRED, 8);
620 if (!IS_SKIP(mb_type) || s->pict_type == B_TYPE) {
621 memset (h->non_zero_count_cache + 8, 0, 4*9*sizeof(uint8_t));
622 s->dsp.clear_blocks(h->mb);
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)
629 cbp = IS_INTRA(mb_type) ? golomb_to_intra4x4_cbp[vlc] : golomb_to_inter_cbp[vlc];
631 if (IS_INTRA16x16(mb_type) || (s->pict_type != I_TYPE && s->adaptive_quant && cbp)) {
632 s->qscale += svq3_get_se_golomb (&s->gb);
637 if (IS_INTRA16x16(mb_type)) {
638 if (svq3_decode_block (&s->gb, h->mb, 0, 0))
643 const int index = IS_INTRA16x16(mb_type) ? 1 : 0;
644 const int type = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1);
646 for (i=0; i < 4; i++) {
647 if ((cbp & (1 << i))) {
648 for (j=0; j < 4; j++) {
649 k = index ? ((j&1) + 2*(i&1) + 2*(j&2) + 4*(i&2)) : (4*i + j);
650 h->non_zero_count_cache[ scan8[k] ] = 1;
652 if (svq3_decode_block (&s->gb, &h->mb[16*k], index, type))
659 for (i=0; i < 2; ++i) {
660 if (svq3_decode_block (&s->gb, &h->mb[16*(16 + 4*i)], 0, 3))
665 for (i=0; i < 8; i++) {
666 h->non_zero_count_cache[ scan8[16+i] ] = 1;
668 if (svq3_decode_block (&s->gb, &h->mb[16*(16 + i)], 1, 1))
675 s->current_picture.mb_type[mb_xy] = mb_type;
677 if (IS_INTRA(mb_type)) {
678 h->chroma_pred_mode = check_intra_pred_mode (h, DC_PRED8x8);
684 static 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;
689 header = get_bits (&s->gb, 8);
691 if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) {
693 av_log(h->s.avctx, AV_LOG_ERROR, "unsupported slice header (%02X)\n", header);
696 int length = (header >> 5) & 3;
698 h->next_slice_index = s->gb.index + 8*show_bits (&s->gb, 8*length) + 8*length;
700 if (h->next_slice_index > s->gb.size_in_bits){
701 av_log(h->s.avctx, AV_LOG_ERROR, "slice after bitstream end\n");
705 s->gb.size_in_bits = h->next_slice_index - 8*(length - 1);
709 memcpy ((uint8_t *) &s->gb.buffer[s->gb.index >> 3],
710 &s->gb.buffer[s->gb.size_in_bits >> 3], (length - 1));
714 if ((i = svq3_get_ue_golomb (&s->gb)) == INVALID_VLC || i >= 3){
715 av_log(h->s.avctx, AV_LOG_ERROR, "illegal slice type %d \n", i);
719 h->slice_type = golomb_to_pict_type[i];
721 if ((header & 0x9F) == 2) {
722 i = (s->mb_num < 64) ? 6 : (1 + av_log2 (s->mb_num - 1));
723 s->mb_skip_run = get_bits (&s->gb, i) - (s->mb_x + (s->mb_y * s->mb_width));
729 h->slice_num = get_bits (&s->gb, 8);
730 s->qscale = get_bits (&s->gb, 5);
731 s->adaptive_quant = get_bits1 (&s->gb);
736 if (h->unknown_svq3_flag) {
741 get_bits (&s->gb, 2);
743 while (get_bits1 (&s->gb)) {
744 get_bits (&s->gb, 8);
747 /* reset intra predictors and invalidate motion vector references */
749 memset (h->intra4x4_pred_mode[mb_xy - 1], -1, 4*sizeof(int8_t));
750 memset (h->intra4x4_pred_mode[mb_xy - s->mb_x], -1, 8*sizeof(int8_t)*s->mb_x);
753 memset (h->intra4x4_pred_mode[mb_xy - s->mb_stride], -1, 8*sizeof(int8_t)*(s->mb_width - s->mb_x));
756 h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] = -1;
763 static int svq3_decode_frame (AVCodecContext *avctx,
764 void *data, int *data_size,
765 uint8_t *buf, int buf_size) {
766 MpegEncContext *const s = avctx->priv_data;
767 H264Context *const h = avctx->priv_data;
772 s->flags = avctx->flags;
773 s->flags2 = avctx->flags2;
774 s->unrestricted_mv = 1;
776 if (!s->context_initialized) {
777 s->width = avctx->width;
778 s->height = avctx->height;
779 h->pred4x4[DIAG_DOWN_LEFT_PRED] = pred4x4_down_left_svq3_c;
780 h->pred16x16[PLANE_PRED8x8] = pred16x16_plane_svq3_c;
782 h->thirdpel_flag = 1;
783 h->unknown_svq3_flag = 0;
786 if (MPV_common_init (s) < 0)
789 h->b_stride = 4*s->mb_width;
793 if (avctx->extradata && avctx->extradata_size >= 0x64
794 && !memcmp (avctx->extradata, "SVQ3", 4)) {
798 init_get_bits (&gb, (uint8_t *) avctx->extradata + 0x62,
799 8*(avctx->extradata_size - 0x62));
801 /* 'frame size code' and optional 'width, height' */
802 if (get_bits (&gb, 3) == 7) {
807 h->halfpel_flag = get_bits1 (&gb);
808 h->thirdpel_flag = get_bits1 (&gb);
816 s->low_delay = get_bits1 (&gb);
821 while (get_bits1 (&gb)) {
825 h->unknown_svq3_flag = get_bits1 (&gb);
826 avctx->has_b_frames = !s->low_delay;
830 /* special case for last picture */
832 if (s->next_picture_ptr && !s->low_delay) {
833 *(AVFrame *) data = *(AVFrame *) &s->next_picture;
834 *data_size = sizeof(AVFrame);
839 init_get_bits (&s->gb, buf, 8*buf_size);
841 s->mb_x = s->mb_y = 0;
843 if (svq3_decode_slice_header (h))
846 s->pict_type = h->slice_type;
847 s->picture_number = h->slice_num;
849 if(avctx->debug&FF_DEBUG_PICT_INFO){
850 av_log(h->s.avctx, AV_LOG_DEBUG, "%c hpel:%d, tpel:%d aqp:%d qp:%d\n",
851 av_get_pict_type_char(s->pict_type), h->halfpel_flag, h->thirdpel_flag,
852 s->adaptive_quant, s->qscale
856 /* for hurry_up==5 */
857 s->current_picture.pict_type = s->pict_type;
858 s->current_picture.key_frame = (s->pict_type == I_TYPE);
860 /* skip b frames if we dont have reference frames */
861 if (s->last_picture_ptr == NULL && s->pict_type == B_TYPE) return 0;
862 /* skip b frames if we are in a hurry */
863 if (avctx->hurry_up && s->pict_type == B_TYPE) return 0;
864 /* skip everything if we are in a hurry >= 5 */
865 if (avctx->hurry_up >= 5) return 0;
867 if (s->next_p_frame_damaged) {
868 if (s->pict_type == B_TYPE)
871 s->next_p_frame_damaged = 0;
876 if (s->pict_type == B_TYPE) {
877 h->frame_num_offset = (h->slice_num - h->prev_frame_num);
879 if (h->frame_num_offset < 0) {
880 h->frame_num_offset += 256;
882 if (h->frame_num_offset == 0 || h->frame_num_offset >= h->prev_frame_num_offset) {
883 av_log(h->s.avctx, AV_LOG_ERROR, "error in B-frame picture id\n");
887 h->prev_frame_num = h->frame_num;
888 h->frame_num = h->slice_num;
889 h->prev_frame_num_offset = (h->frame_num - h->prev_frame_num);
891 if (h->prev_frame_num_offset < 0) {
892 h->prev_frame_num_offset += 256;
901 h->ref_cache[m][scan8[0] + 8*i + j]= 1;
902 h->ref_cache[m][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE;
906 for (s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) {
907 for (s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
909 if ( (s->gb.index + 7) >= s->gb.size_in_bits &&
910 ((s->gb.index & 7) == 0 || show_bits (&s->gb, (-s->gb.index & 7)) == 0)) {
912 s->gb.index = h->next_slice_index;
913 s->gb.size_in_bits = 8*buf_size;
915 if (svq3_decode_slice_header (h))
918 /* TODO: support s->mb_skip_run */
921 mb_type = svq3_get_ue_golomb (&s->gb);
923 if (s->pict_type == I_TYPE) {
925 } else if (s->pict_type == B_TYPE && mb_type >= 4) {
928 if (mb_type > 33 || svq3_decode_mb (h, mb_type)) {
929 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
937 if (s->pict_type != B_TYPE && !s->low_delay) {
938 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
939 (s->pict_type == P_TYPE && mb_type < 8) ? (mb_type - 1) : -1;
943 ff_draw_horiz_band(s, 16*s->mb_y, 16);
948 if (s->pict_type == B_TYPE || s->low_delay) {
949 *(AVFrame *) data = *(AVFrame *) &s->current_picture;
951 *(AVFrame *) data = *(AVFrame *) &s->last_picture;
954 avctx->frame_number = s->picture_number - 1;
956 /* dont output the last pic after seeking */
957 if (s->last_picture_ptr || s->low_delay) {
958 *data_size = sizeof(AVFrame);
965 AVCodec svq3_decoder = {
974 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,