1 /*
2 * RoQ Video Encoder.
3 *
4 * Copyright (C) 2007 Vitor Sessak <vitor1001@gmail.com>
5 * Copyright (C) 2004-2007 Eric Lasota
6 * Based on RoQ specs (C) 2001 Tim Ferguson
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 /**
26 * @file
27 * id RoQ encoder by Vitor. Based on the Switchblade3 library and the
28 * Switchblade3 FFmpeg glue by Eric Lasota.
29 */
30
31 /*
32 * COSTS:
33 * Level 1:
34 * SKIP - 2 bits
35 * MOTION - 2 + 8 bits
36 * CODEBOOK - 2 + 8 bits
37 * SUBDIVIDE - 2 + combined subcel cost
38 *
39 * Level 2:
40 * SKIP - 2 bits
41 * MOTION - 2 + 8 bits
42 * CODEBOOK - 2 + 8 bits
43 * SUBDIVIDE - 2 + 4*8 bits
44 *
45 * Maximum cost: 138 bits per cel
46 *
47 * Proper evaluation requires LCD fraction comparison, which requires
48 * Squared Error (SE) loss * savings increase
49 *
50 * Maximum savings increase: 136 bits
51 * Maximum SE loss without overflow: 31580641
52 * Components in 8x8 supercel: 192
53 * Maximum SE precision per component: 164482
54 * >65025, so no truncation is needed (phew)
55 */
56
57 #include <string.h>
58
59 #include "libavutil/attributes.h"
60 #include "libavutil/opt.h"
61 #include "roqvideo.h"
62 #include "bytestream.h"
63 #include "elbg.h"
64 #include "internal.h"
65 #include "mathops.h"
66
67 #define CHROMA_BIAS 1
68
69 /**
70 * Maximum number of generated 4x4 codebooks. Can't be 256 to workaround a
71 * Quake 3 bug.
72 */
73 #define MAX_CBS_4x4 256
74
75 #define MAX_CBS_2x2 256 ///< Maximum number of 2x2 codebooks.
76
77 /* The cast is useful when multiplying it by INT_MAX */
78 #define ROQ_LAMBDA_SCALE ((uint64_t) FF_LAMBDA_SCALE)
79
80 /* Macroblock support functions */
unpack_roq_cell(roq_cell * cell,uint8_t u[4* 3])81 static void unpack_roq_cell(roq_cell *cell, uint8_t u[4*3])
82 {
83 memcpy(u , cell->y, 4);
84 memset(u+4, cell->u, 4);
85 memset(u+8, cell->v, 4);
86 }
87
unpack_roq_qcell(uint8_t cb2[],roq_qcell * qcell,uint8_t u[4* 4* 3])88 static void unpack_roq_qcell(uint8_t cb2[], roq_qcell *qcell, uint8_t u[4*4*3])
89 {
90 int i,cp;
91 static const int offsets[4] = {0, 2, 8, 10};
92
93 for (cp=0; cp<3; cp++)
94 for (i=0; i<4; i++) {
95 u[4*4*cp + offsets[i] ] = cb2[qcell->idx[i]*2*2*3 + 4*cp ];
96 u[4*4*cp + offsets[i]+1] = cb2[qcell->idx[i]*2*2*3 + 4*cp+1];
97 u[4*4*cp + offsets[i]+4] = cb2[qcell->idx[i]*2*2*3 + 4*cp+2];
98 u[4*4*cp + offsets[i]+5] = cb2[qcell->idx[i]*2*2*3 + 4*cp+3];
99 }
100 }
101
102
enlarge_roq_mb4(uint8_t base[3* 16],uint8_t u[3* 64])103 static void enlarge_roq_mb4(uint8_t base[3*16], uint8_t u[3*64])
104 {
105 int x,y,cp;
106
107 for(cp=0; cp<3; cp++)
108 for(y=0; y<8; y++)
109 for(x=0; x<8; x++)
110 *u++ = base[(y/2)*4 + (x/2) + 16*cp];
111 }
112
square(int x)113 static inline int square(int x)
114 {
115 return x*x;
116 }
117
eval_sse(const uint8_t * a,const uint8_t * b,int count)118 static inline int eval_sse(const uint8_t *a, const uint8_t *b, int count)
119 {
120 int diff=0;
121
122 while(count--)
123 diff += square(*b++ - *a++);
124
125 return diff;
126 }
127
128 // FIXME Could use DSPContext.sse, but it is not so speed critical (used
129 // just for motion estimation).
block_sse(uint8_t * const * buf1,uint8_t * const * buf2,int x1,int y1,int x2,int y2,const int * stride1,const int * stride2,int size)130 static int block_sse(uint8_t * const *buf1, uint8_t * const *buf2, int x1, int y1,
131 int x2, int y2, const int *stride1, const int *stride2, int size)
132 {
133 int i, k;
134 int sse=0;
135
136 for (k=0; k<3; k++) {
137 int bias = (k ? CHROMA_BIAS : 4);
138 for (i=0; i<size; i++)
139 sse += bias*eval_sse(buf1[k] + (y1+i)*stride1[k] + x1,
140 buf2[k] + (y2+i)*stride2[k] + x2, size);
141 }
142
143 return sse;
144 }
145
eval_motion_dist(RoqContext * enc,int x,int y,motion_vect vect,int size)146 static int eval_motion_dist(RoqContext *enc, int x, int y, motion_vect vect,
147 int size)
148 {
149 int mx=vect.d[0];
150 int my=vect.d[1];
151
152 if (mx < -7 || mx > 7)
153 return INT_MAX;
154
155 if (my < -7 || my > 7)
156 return INT_MAX;
157
158 mx += x;
159 my += y;
160
161 if ((unsigned) mx > enc->width-size || (unsigned) my > enc->height-size)
162 return INT_MAX;
163
164 return block_sse(enc->frame_to_enc->data, enc->last_frame->data, x, y,
165 mx, my,
166 enc->frame_to_enc->linesize, enc->last_frame->linesize,
167 size);
168 }
169
170 /**
171 * @return distortion between two macroblocks
172 */
squared_diff_macroblock(uint8_t a[],uint8_t b[],int size)173 static inline int squared_diff_macroblock(uint8_t a[], uint8_t b[], int size)
174 {
175 int cp, sdiff=0;
176
177 for(cp=0;cp<3;cp++) {
178 int bias = (cp ? CHROMA_BIAS : 4);
179 sdiff += bias*eval_sse(a, b, size*size);
180 a += size*size;
181 b += size*size;
182 }
183
184 return sdiff;
185 }
186
187 typedef struct SubcelEvaluation {
188 int eval_dist[4];
189 int best_bit_use;
190 int best_coding;
191
192 int subCels[4];
193 motion_vect motion;
194 int cbEntry;
195 } SubcelEvaluation;
196
197 typedef struct CelEvaluation {
198 int eval_dist[4];
199 int best_coding;
200
201 SubcelEvaluation subCels[4];
202
203 motion_vect motion;
204 int cbEntry;
205
206 int sourceX, sourceY;
207 } CelEvaluation;
208
209 typedef struct RoqCodebooks {
210 int numCB4;
211 int numCB2;
212 int usedCB2[MAX_CBS_2x2];
213 int usedCB4[MAX_CBS_4x4];
214 uint8_t unpacked_cb2[MAX_CBS_2x2*2*2*3];
215 uint8_t unpacked_cb4[MAX_CBS_4x4*4*4*3];
216 uint8_t unpacked_cb4_enlarged[MAX_CBS_4x4*8*8*3];
217 } RoqCodebooks;
218
219 /**
220 * Temporary vars
221 */
222 typedef struct RoqTempData
223 {
224 CelEvaluation *cel_evals;
225
226 int f2i4[MAX_CBS_4x4];
227 int i2f4[MAX_CBS_4x4];
228 int f2i2[MAX_CBS_2x2];
229 int i2f2[MAX_CBS_2x2];
230
231 int mainChunkSize;
232
233 int numCB4;
234 int numCB2;
235
236 RoqCodebooks codebooks;
237
238 int *closest_cb2;
239 int used_option[4];
240 } RoqTempdata;
241
242 /**
243 * Initialize cel evaluators and set their source coordinates
244 */
create_cel_evals(RoqContext * enc,RoqTempdata * tempData)245 static int create_cel_evals(RoqContext *enc, RoqTempdata *tempData)
246 {
247 int n=0, x, y, i;
248
249 tempData->cel_evals = av_malloc_array(enc->width*enc->height/64, sizeof(CelEvaluation));
250 if (!tempData->cel_evals)
251 return AVERROR(ENOMEM);
252
253 /* Map to the ROQ quadtree order */
254 for (y=0; y<enc->height; y+=16)
255 for (x=0; x<enc->width; x+=16)
256 for(i=0; i<4; i++) {
257 tempData->cel_evals[n ].sourceX = x + (i&1)*8;
258 tempData->cel_evals[n++].sourceY = y + (i&2)*4;
259 }
260
261 return 0;
262 }
263
264 /**
265 * Get macroblocks from parts of the image
266 */
get_frame_mb(const AVFrame * frame,int x,int y,uint8_t mb[],int dim)267 static void get_frame_mb(const AVFrame *frame, int x, int y, uint8_t mb[], int dim)
268 {
269 int i, j, cp;
270
271 for (cp=0; cp<3; cp++) {
272 int stride = frame->linesize[cp];
273 for (i=0; i<dim; i++)
274 for (j=0; j<dim; j++)
275 *mb++ = frame->data[cp][(y+i)*stride + x + j];
276 }
277 }
278
279 /**
280 * Find the codebook with the lowest distortion from an image
281 */
index_mb(uint8_t cluster[],uint8_t cb[],int numCB,int * outIndex,int dim)282 static int index_mb(uint8_t cluster[], uint8_t cb[], int numCB,
283 int *outIndex, int dim)
284 {
285 int i, lDiff = INT_MAX, pick=0;
286
287 /* Diff against the others */
288 for (i=0; i<numCB; i++) {
289 int diff = squared_diff_macroblock(cluster, cb + i*dim*dim*3, dim);
290 if (diff < lDiff) {
291 lDiff = diff;
292 pick = i;
293 }
294 }
295
296 *outIndex = pick;
297 return lDiff;
298 }
299
300 #define EVAL_MOTION(MOTION) \
301 do { \
302 diff = eval_motion_dist(enc, j, i, MOTION, blocksize); \
303 \
304 if (diff < lowestdiff) { \
305 lowestdiff = diff; \
306 bestpick = MOTION; \
307 } \
308 } while(0)
309
motion_search(RoqContext * enc,int blocksize)310 static void motion_search(RoqContext *enc, int blocksize)
311 {
312 static const motion_vect offsets[8] = {
313 {{ 0,-1}},
314 {{ 0, 1}},
315 {{-1, 0}},
316 {{ 1, 0}},
317 {{-1, 1}},
318 {{ 1,-1}},
319 {{-1,-1}},
320 {{ 1, 1}},
321 };
322
323 int diff, lowestdiff, oldbest;
324 int off[3];
325 motion_vect bestpick = {{0,0}};
326 int i, j, k, offset;
327
328 motion_vect *last_motion;
329 motion_vect *this_motion;
330 motion_vect vect, vect2;
331
332 int max=(enc->width/blocksize)*enc->height/blocksize;
333
334 if (blocksize == 4) {
335 last_motion = enc->last_motion4;
336 this_motion = enc->this_motion4;
337 } else {
338 last_motion = enc->last_motion8;
339 this_motion = enc->this_motion8;
340 }
341
342 for (i=0; i<enc->height; i+=blocksize)
343 for (j=0; j<enc->width; j+=blocksize) {
344 lowestdiff = eval_motion_dist(enc, j, i, (motion_vect) {{0,0}},
345 blocksize);
346 bestpick.d[0] = 0;
347 bestpick.d[1] = 0;
348
349 if (blocksize == 4)
350 EVAL_MOTION(enc->this_motion8[(i/8)*(enc->width/8) + j/8]);
351
352 offset = (i/blocksize)*enc->width/blocksize + j/blocksize;
353 if (offset < max && offset >= 0)
354 EVAL_MOTION(last_motion[offset]);
355
356 offset++;
357 if (offset < max && offset >= 0)
358 EVAL_MOTION(last_motion[offset]);
359
360 offset = (i/blocksize + 1)*enc->width/blocksize + j/blocksize;
361 if (offset < max && offset >= 0)
362 EVAL_MOTION(last_motion[offset]);
363
364 off[0]= (i/blocksize)*enc->width/blocksize + j/blocksize - 1;
365 off[1]= off[0] - enc->width/blocksize + 1;
366 off[2]= off[1] + 1;
367
368 if (i) {
369
370 for(k=0; k<2; k++)
371 vect.d[k]= mid_pred(this_motion[off[0]].d[k],
372 this_motion[off[1]].d[k],
373 this_motion[off[2]].d[k]);
374
375 EVAL_MOTION(vect);
376 for(k=0; k<3; k++)
377 EVAL_MOTION(this_motion[off[k]]);
378 } else if(j)
379 EVAL_MOTION(this_motion[off[0]]);
380
381 vect = bestpick;
382
383 oldbest = -1;
384 while (oldbest != lowestdiff) {
385 oldbest = lowestdiff;
386 for (k=0; k<8; k++) {
387 vect2 = vect;
388 vect2.d[0] += offsets[k].d[0];
389 vect2.d[1] += offsets[k].d[1];
390 EVAL_MOTION(vect2);
391 }
392 vect = bestpick;
393 }
394 offset = (i/blocksize)*enc->width/blocksize + j/blocksize;
395 this_motion[offset] = bestpick;
396 }
397 }
398
399 /**
400 * Get distortion for all options available to a subcel
401 */
gather_data_for_subcel(SubcelEvaluation * subcel,int x,int y,RoqContext * enc,RoqTempdata * tempData)402 static void gather_data_for_subcel(SubcelEvaluation *subcel, int x,
403 int y, RoqContext *enc, RoqTempdata *tempData)
404 {
405 uint8_t mb4[4*4*3];
406 uint8_t mb2[2*2*3];
407 int cluster_index;
408 int i, best_dist;
409
410 static const int bitsUsed[4] = {2, 10, 10, 34};
411
412 if (enc->framesSinceKeyframe >= 1) {
413 subcel->motion = enc->this_motion4[y*enc->width/16 + x/4];
414
415 subcel->eval_dist[RoQ_ID_FCC] =
416 eval_motion_dist(enc, x, y,
417 enc->this_motion4[y*enc->width/16 + x/4], 4);
418 } else
419 subcel->eval_dist[RoQ_ID_FCC] = INT_MAX;
420
421 if (enc->framesSinceKeyframe >= 2)
422 subcel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data,
423 enc->current_frame->data, x,
424 y, x, y,
425 enc->frame_to_enc->linesize,
426 enc->current_frame->linesize,
427 4);
428 else
429 subcel->eval_dist[RoQ_ID_MOT] = INT_MAX;
430
431 cluster_index = y*enc->width/16 + x/4;
432
433 get_frame_mb(enc->frame_to_enc, x, y, mb4, 4);
434
435 subcel->eval_dist[RoQ_ID_SLD] = index_mb(mb4,
436 tempData->codebooks.unpacked_cb4,
437 tempData->codebooks.numCB4,
438 &subcel->cbEntry, 4);
439
440 subcel->eval_dist[RoQ_ID_CCC] = 0;
441
442 for(i=0;i<4;i++) {
443 subcel->subCels[i] = tempData->closest_cb2[cluster_index*4+i];
444
445 get_frame_mb(enc->frame_to_enc, x+2*(i&1),
446 y+(i&2), mb2, 2);
447
448 subcel->eval_dist[RoQ_ID_CCC] +=
449 squared_diff_macroblock(tempData->codebooks.unpacked_cb2 + subcel->subCels[i]*2*2*3, mb2, 2);
450 }
451
452 best_dist = INT_MAX;
453 for (i=0; i<4; i++)
454 if (ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + enc->lambda*bitsUsed[i] <
455 best_dist) {
456 subcel->best_coding = i;
457 subcel->best_bit_use = bitsUsed[i];
458 best_dist = ROQ_LAMBDA_SCALE*subcel->eval_dist[i] +
459 enc->lambda*bitsUsed[i];
460 }
461 }
462
463 /**
464 * Get distortion for all options available to a cel
465 */
gather_data_for_cel(CelEvaluation * cel,RoqContext * enc,RoqTempdata * tempData)466 static void gather_data_for_cel(CelEvaluation *cel, RoqContext *enc,
467 RoqTempdata *tempData)
468 {
469 uint8_t mb8[8*8*3];
470 int index = cel->sourceY*enc->width/64 + cel->sourceX/8;
471 int i, j, best_dist, divide_bit_use;
472
473 int bitsUsed[4] = {2, 10, 10, 0};
474
475 if (enc->framesSinceKeyframe >= 1) {
476 cel->motion = enc->this_motion8[index];
477
478 cel->eval_dist[RoQ_ID_FCC] =
479 eval_motion_dist(enc, cel->sourceX, cel->sourceY,
480 enc->this_motion8[index], 8);
481 } else
482 cel->eval_dist[RoQ_ID_FCC] = INT_MAX;
483
484 if (enc->framesSinceKeyframe >= 2)
485 cel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data,
486 enc->current_frame->data,
487 cel->sourceX, cel->sourceY,
488 cel->sourceX, cel->sourceY,
489 enc->frame_to_enc->linesize,
490 enc->current_frame->linesize,8);
491 else
492 cel->eval_dist[RoQ_ID_MOT] = INT_MAX;
493
494 get_frame_mb(enc->frame_to_enc, cel->sourceX, cel->sourceY, mb8, 8);
495
496 cel->eval_dist[RoQ_ID_SLD] =
497 index_mb(mb8, tempData->codebooks.unpacked_cb4_enlarged,
498 tempData->codebooks.numCB4, &cel->cbEntry, 8);
499
500 gather_data_for_subcel(cel->subCels + 0, cel->sourceX+0, cel->sourceY+0, enc, tempData);
501 gather_data_for_subcel(cel->subCels + 1, cel->sourceX+4, cel->sourceY+0, enc, tempData);
502 gather_data_for_subcel(cel->subCels + 2, cel->sourceX+0, cel->sourceY+4, enc, tempData);
503 gather_data_for_subcel(cel->subCels + 3, cel->sourceX+4, cel->sourceY+4, enc, tempData);
504
505 cel->eval_dist[RoQ_ID_CCC] = 0;
506 divide_bit_use = 0;
507 for (i=0; i<4; i++) {
508 cel->eval_dist[RoQ_ID_CCC] +=
509 cel->subCels[i].eval_dist[cel->subCels[i].best_coding];
510 divide_bit_use += cel->subCels[i].best_bit_use;
511 }
512
513 best_dist = INT_MAX;
514 bitsUsed[3] = 2 + divide_bit_use;
515
516 for (i=0; i<4; i++)
517 if (ROQ_LAMBDA_SCALE*cel->eval_dist[i] + enc->lambda*bitsUsed[i] <
518 best_dist) {
519 cel->best_coding = i;
520 best_dist = ROQ_LAMBDA_SCALE*cel->eval_dist[i] +
521 enc->lambda*bitsUsed[i];
522 }
523
524 tempData->used_option[cel->best_coding]++;
525 tempData->mainChunkSize += bitsUsed[cel->best_coding];
526
527 if (cel->best_coding == RoQ_ID_SLD)
528 tempData->codebooks.usedCB4[cel->cbEntry]++;
529
530 if (cel->best_coding == RoQ_ID_CCC)
531 for (i=0; i<4; i++) {
532 if (cel->subCels[i].best_coding == RoQ_ID_SLD)
533 tempData->codebooks.usedCB4[cel->subCels[i].cbEntry]++;
534 else if (cel->subCels[i].best_coding == RoQ_ID_CCC)
535 for (j=0; j<4; j++)
536 tempData->codebooks.usedCB2[cel->subCels[i].subCels[j]]++;
537 }
538 }
539
remap_codebooks(RoqContext * enc,RoqTempdata * tempData)540 static void remap_codebooks(RoqContext *enc, RoqTempdata *tempData)
541 {
542 int i, j, idx=0;
543
544 /* Make remaps for the final codebook usage */
545 for (i=0; i<(enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4); i++) {
546 if (tempData->codebooks.usedCB4[i]) {
547 tempData->i2f4[i] = idx;
548 tempData->f2i4[idx] = i;
549 for (j=0; j<4; j++)
550 tempData->codebooks.usedCB2[enc->cb4x4[i].idx[j]]++;
551 idx++;
552 }
553 }
554
555 tempData->numCB4 = idx;
556
557 idx = 0;
558 for (i=0; i<MAX_CBS_2x2; i++) {
559 if (tempData->codebooks.usedCB2[i]) {
560 tempData->i2f2[i] = idx;
561 tempData->f2i2[idx] = i;
562 idx++;
563 }
564 }
565 tempData->numCB2 = idx;
566
567 }
568
569 /**
570 * Write codebook chunk
571 */
write_codebooks(RoqContext * enc,RoqTempdata * tempData)572 static void write_codebooks(RoqContext *enc, RoqTempdata *tempData)
573 {
574 int i, j;
575 uint8_t **outp= &enc->out_buf;
576
577 if (tempData->numCB2) {
578 bytestream_put_le16(outp, RoQ_QUAD_CODEBOOK);
579 bytestream_put_le32(outp, tempData->numCB2*6 + tempData->numCB4*4);
580 bytestream_put_byte(outp, tempData->numCB4);
581 bytestream_put_byte(outp, tempData->numCB2);
582
583 for (i=0; i<tempData->numCB2; i++) {
584 bytestream_put_buffer(outp, enc->cb2x2[tempData->f2i2[i]].y, 4);
585 bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].u);
586 bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].v);
587 }
588
589 for (i=0; i<tempData->numCB4; i++)
590 for (j=0; j<4; j++)
591 bytestream_put_byte(outp, tempData->i2f2[enc->cb4x4[tempData->f2i4[i]].idx[j]]);
592
593 }
594 }
595
motion_arg(motion_vect mot)596 static inline uint8_t motion_arg(motion_vect mot)
597 {
598 uint8_t ax = 8 - ((uint8_t) mot.d[0]);
599 uint8_t ay = 8 - ((uint8_t) mot.d[1]);
600 return ((ax&15)<<4) | (ay&15);
601 }
602
603 typedef struct CodingSpool {
604 int typeSpool;
605 int typeSpoolLength;
606 uint8_t argumentSpool[64];
607 uint8_t *args;
608 uint8_t **pout;
609 } CodingSpool;
610
611 /* NOTE: Typecodes must be spooled AFTER arguments!! */
write_typecode(CodingSpool * s,uint8_t type)612 static void write_typecode(CodingSpool *s, uint8_t type)
613 {
614 s->typeSpool |= (type & 3) << (14 - s->typeSpoolLength);
615 s->typeSpoolLength += 2;
616 if (s->typeSpoolLength == 16) {
617 bytestream_put_le16(s->pout, s->typeSpool);
618 bytestream_put_buffer(s->pout, s->argumentSpool,
619 s->args - s->argumentSpool);
620 s->typeSpoolLength = 0;
621 s->typeSpool = 0;
622 s->args = s->argumentSpool;
623 }
624 }
625
reconstruct_and_encode_image(RoqContext * enc,RoqTempdata * tempData,int w,int h,int numBlocks)626 static void reconstruct_and_encode_image(RoqContext *enc, RoqTempdata *tempData, int w, int h, int numBlocks)
627 {
628 int i, j, k;
629 int x, y;
630 int subX, subY;
631 int dist=0;
632
633 roq_qcell *qcell;
634 CelEvaluation *eval;
635
636 CodingSpool spool;
637
638 spool.typeSpool=0;
639 spool.typeSpoolLength=0;
640 spool.args = spool.argumentSpool;
641 spool.pout = &enc->out_buf;
642
643 if (tempData->used_option[RoQ_ID_CCC]%2)
644 tempData->mainChunkSize+=8; //FIXME
645
646 /* Write the video chunk header */
647 bytestream_put_le16(&enc->out_buf, RoQ_QUAD_VQ);
648 bytestream_put_le32(&enc->out_buf, tempData->mainChunkSize/8);
649 bytestream_put_byte(&enc->out_buf, 0x0);
650 bytestream_put_byte(&enc->out_buf, 0x0);
651
652 for (i=0; i<numBlocks; i++) {
653 eval = tempData->cel_evals + i;
654
655 x = eval->sourceX;
656 y = eval->sourceY;
657 dist += eval->eval_dist[eval->best_coding];
658
659 switch (eval->best_coding) {
660 case RoQ_ID_MOT:
661 write_typecode(&spool, RoQ_ID_MOT);
662 break;
663
664 case RoQ_ID_FCC:
665 bytestream_put_byte(&spool.args, motion_arg(eval->motion));
666
667 write_typecode(&spool, RoQ_ID_FCC);
668 ff_apply_motion_8x8(enc, x, y,
669 eval->motion.d[0], eval->motion.d[1]);
670 break;
671
672 case RoQ_ID_SLD:
673 bytestream_put_byte(&spool.args, tempData->i2f4[eval->cbEntry]);
674 write_typecode(&spool, RoQ_ID_SLD);
675
676 qcell = enc->cb4x4 + eval->cbEntry;
677 ff_apply_vector_4x4(enc, x , y , enc->cb2x2 + qcell->idx[0]);
678 ff_apply_vector_4x4(enc, x+4, y , enc->cb2x2 + qcell->idx[1]);
679 ff_apply_vector_4x4(enc, x , y+4, enc->cb2x2 + qcell->idx[2]);
680 ff_apply_vector_4x4(enc, x+4, y+4, enc->cb2x2 + qcell->idx[3]);
681 break;
682
683 case RoQ_ID_CCC:
684 write_typecode(&spool, RoQ_ID_CCC);
685
686 for (j=0; j<4; j++) {
687 subX = x + 4*(j&1);
688 subY = y + 2*(j&2);
689
690 switch(eval->subCels[j].best_coding) {
691 case RoQ_ID_MOT:
692 break;
693
694 case RoQ_ID_FCC:
695 bytestream_put_byte(&spool.args,
696 motion_arg(eval->subCels[j].motion));
697
698 ff_apply_motion_4x4(enc, subX, subY,
699 eval->subCels[j].motion.d[0],
700 eval->subCels[j].motion.d[1]);
701 break;
702
703 case RoQ_ID_SLD:
704 bytestream_put_byte(&spool.args,
705 tempData->i2f4[eval->subCels[j].cbEntry]);
706
707 qcell = enc->cb4x4 + eval->subCels[j].cbEntry;
708
709 ff_apply_vector_2x2(enc, subX , subY ,
710 enc->cb2x2 + qcell->idx[0]);
711 ff_apply_vector_2x2(enc, subX+2, subY ,
712 enc->cb2x2 + qcell->idx[1]);
713 ff_apply_vector_2x2(enc, subX , subY+2,
714 enc->cb2x2 + qcell->idx[2]);
715 ff_apply_vector_2x2(enc, subX+2, subY+2,
716 enc->cb2x2 + qcell->idx[3]);
717 break;
718
719 case RoQ_ID_CCC:
720 for (k=0; k<4; k++) {
721 int cb_idx = eval->subCels[j].subCels[k];
722 bytestream_put_byte(&spool.args,
723 tempData->i2f2[cb_idx]);
724
725 ff_apply_vector_2x2(enc, subX + 2*(k&1), subY + (k&2),
726 enc->cb2x2 + cb_idx);
727 }
728 break;
729 }
730 write_typecode(&spool, eval->subCels[j].best_coding);
731 }
732 break;
733 }
734 }
735
736 /* Flush the remainder of the argument/type spool */
737 while (spool.typeSpoolLength)
738 write_typecode(&spool, 0x0);
739 }
740
741
742 /**
743 * Create a single YUV cell from a 2x2 section of the image
744 */
frame_block_to_cell(uint8_t * block,uint8_t * const * data,int top,int left,const int * stride)745 static inline void frame_block_to_cell(uint8_t *block, uint8_t * const *data,
746 int top, int left, const int *stride)
747 {
748 int i, j, u=0, v=0;
749
750 for (i=0; i<2; i++)
751 for (j=0; j<2; j++) {
752 int x = (top+i)*stride[0] + left + j;
753 *block++ = data[0][x];
754 x = (top+i)*stride[1] + left + j;
755 u += data[1][x];
756 v += data[2][x];
757 }
758
759 *block++ = (u+2)/4;
760 *block++ = (v+2)/4;
761 }
762
763 /**
764 * Create YUV clusters for the entire image
765 */
create_clusters(const AVFrame * frame,int w,int h,uint8_t * yuvClusters)766 static void create_clusters(const AVFrame *frame, int w, int h, uint8_t *yuvClusters)
767 {
768 int i, j, k, l;
769
770 for (i=0; i<h; i+=4)
771 for (j=0; j<w; j+=4) {
772 for (k=0; k < 2; k++)
773 for (l=0; l < 2; l++)
774 frame_block_to_cell(yuvClusters + (l + 2*k)*6, frame->data,
775 i+2*k, j+2*l, frame->linesize);
776 yuvClusters += 24;
777 }
778 }
779
generate_codebook(RoqContext * enc,RoqTempdata * tempdata,int * points,int inputCount,roq_cell * results,int size,int cbsize)780 static int generate_codebook(RoqContext *enc, RoqTempdata *tempdata,
781 int *points, int inputCount, roq_cell *results,
782 int size, int cbsize)
783 {
784 int i, j, k, ret = 0;
785 int c_size = size*size/4;
786 int *buf;
787 int *codebook = av_malloc_array(6*c_size, cbsize*sizeof(int));
788 int *closest_cb;
789
790 if (!codebook)
791 return AVERROR(ENOMEM);
792
793 if (size == 4) {
794 closest_cb = av_malloc_array(6*c_size, inputCount*sizeof(int));
795 if (!closest_cb) {
796 ret = AVERROR(ENOMEM);
797 goto out;
798 }
799 } else
800 closest_cb = tempdata->closest_cb2;
801
802 ret = avpriv_init_elbg(points, 6 * c_size, inputCount, codebook,
803 cbsize, 1, closest_cb, &enc->randctx);
804 if (ret < 0)
805 goto out;
806 ret = avpriv_do_elbg(points, 6 * c_size, inputCount, codebook,
807 cbsize, 1, closest_cb, &enc->randctx);
808 if (ret < 0)
809 goto out;
810
811 buf = codebook;
812 for (i=0; i<cbsize; i++)
813 for (k=0; k<c_size; k++) {
814 for(j=0; j<4; j++)
815 results->y[j] = *buf++;
816
817 results->u = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS;
818 results->v = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS;
819 results++;
820 }
821 out:
822 if (size == 4)
823 av_free(closest_cb);
824 av_free(codebook);
825 return ret;
826 }
827
generate_new_codebooks(RoqContext * enc,RoqTempdata * tempData)828 static int generate_new_codebooks(RoqContext *enc, RoqTempdata *tempData)
829 {
830 int i, j, ret = 0;
831 RoqCodebooks *codebooks = &tempData->codebooks;
832 int max = enc->width*enc->height/16;
833 uint8_t mb2[3*4];
834 roq_cell *results4 = av_malloc(sizeof(roq_cell)*MAX_CBS_4x4*4);
835 uint8_t *yuvClusters=av_malloc_array(max, sizeof(int)*6*4);
836 int *points = av_malloc_array(max, 6*4*sizeof(int));
837 int bias;
838
839 if (!results4 || !yuvClusters || !points) {
840 ret = AVERROR(ENOMEM);
841 goto out;
842 }
843
844 /* Subsample YUV data */
845 create_clusters(enc->frame_to_enc, enc->width, enc->height, yuvClusters);
846
847 /* Cast to integer and apply chroma bias */
848 for (i=0; i<max*24; i++) {
849 bias = ((i%6)<4) ? 1 : CHROMA_BIAS;
850 points[i] = bias*yuvClusters[i];
851 }
852
853 /* Create 4x4 codebooks */
854 if ((ret = generate_codebook(enc, tempData, points, max,
855 results4, 4, (enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4))) < 0)
856 goto out;
857
858 codebooks->numCB4 = (enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4);
859
860 tempData->closest_cb2 = av_malloc_array(max, 4*sizeof(int));
861 if (!tempData->closest_cb2) {
862 ret = AVERROR(ENOMEM);
863 goto out;
864 }
865
866 /* Create 2x2 codebooks */
867 if ((ret = generate_codebook(enc, tempData, points, max * 4,
868 enc->cb2x2, 2, MAX_CBS_2x2)) < 0)
869 goto out;
870
871 codebooks->numCB2 = MAX_CBS_2x2;
872
873 /* Unpack 2x2 codebook clusters */
874 for (i=0; i<codebooks->numCB2; i++)
875 unpack_roq_cell(enc->cb2x2 + i, codebooks->unpacked_cb2 + i*2*2*3);
876
877 /* Index all 4x4 entries to the 2x2 entries, unpack, and enlarge */
878 for (i=0; i<codebooks->numCB4; i++) {
879 for (j=0; j<4; j++) {
880 unpack_roq_cell(&results4[4*i + j], mb2);
881 index_mb(mb2, codebooks->unpacked_cb2, codebooks->numCB2,
882 &enc->cb4x4[i].idx[j], 2);
883 }
884 unpack_roq_qcell(codebooks->unpacked_cb2, enc->cb4x4 + i,
885 codebooks->unpacked_cb4 + i*4*4*3);
886 enlarge_roq_mb4(codebooks->unpacked_cb4 + i*4*4*3,
887 codebooks->unpacked_cb4_enlarged + i*8*8*3);
888 }
889 out:
890 av_free(yuvClusters);
891 av_free(points);
892 av_free(results4);
893 return ret;
894 }
895
roq_encode_video(RoqContext * enc)896 static int roq_encode_video(RoqContext *enc)
897 {
898 RoqTempdata *tempData = enc->tmpData;
899 int i, ret;
900
901 memset(tempData, 0, sizeof(*tempData));
902
903 ret = create_cel_evals(enc, tempData);
904 if (ret < 0)
905 return ret;
906
907 ret = generate_new_codebooks(enc, tempData);
908 if (ret < 0)
909 return ret;
910
911 if (enc->framesSinceKeyframe >= 1) {
912 motion_search(enc, 8);
913 motion_search(enc, 4);
914 }
915
916 retry_encode:
917 for (i=0; i<enc->width*enc->height/64; i++)
918 gather_data_for_cel(tempData->cel_evals + i, enc, tempData);
919
920 /* Quake 3 can't handle chunks bigger than 65535 bytes */
921 if (tempData->mainChunkSize/8 > 65535 && enc->quake3_compat) {
922 if (enc->lambda > 100000) {
923 av_log(enc->avctx, AV_LOG_ERROR, "Cannot encode video in Quake compatible form\n");
924 return AVERROR(EINVAL);
925 }
926 av_log(enc->avctx, AV_LOG_ERROR,
927 "Warning, generated a frame too big for Quake (%d > 65535), "
928 "now switching to a bigger qscale value.\n",
929 tempData->mainChunkSize/8);
930 enc->lambda *= 1.5;
931 tempData->mainChunkSize = 0;
932 memset(tempData->used_option, 0, sizeof(tempData->used_option));
933 memset(tempData->codebooks.usedCB4, 0,
934 sizeof(tempData->codebooks.usedCB4));
935 memset(tempData->codebooks.usedCB2, 0,
936 sizeof(tempData->codebooks.usedCB2));
937
938 goto retry_encode;
939 }
940
941 remap_codebooks(enc, tempData);
942
943 write_codebooks(enc, tempData);
944
945 reconstruct_and_encode_image(enc, tempData, enc->width, enc->height,
946 enc->width*enc->height/64);
947
948 /* Rotate frame history */
949 FFSWAP(AVFrame *, enc->current_frame, enc->last_frame);
950 FFSWAP(motion_vect *, enc->last_motion4, enc->this_motion4);
951 FFSWAP(motion_vect *, enc->last_motion8, enc->this_motion8);
952
953 av_freep(&tempData->cel_evals);
954 av_freep(&tempData->closest_cb2);
955
956 enc->framesSinceKeyframe++;
957
958 return 0;
959 }
960
roq_encode_end(AVCodecContext * avctx)961 static av_cold int roq_encode_end(AVCodecContext *avctx)
962 {
963 RoqContext *enc = avctx->priv_data;
964
965 av_frame_free(&enc->current_frame);
966 av_frame_free(&enc->last_frame);
967
968 av_freep(&enc->tmpData);
969 av_freep(&enc->this_motion4);
970 av_freep(&enc->last_motion4);
971 av_freep(&enc->this_motion8);
972 av_freep(&enc->last_motion8);
973
974 return 0;
975 }
976
roq_encode_init(AVCodecContext * avctx)977 static av_cold int roq_encode_init(AVCodecContext *avctx)
978 {
979 RoqContext *enc = avctx->priv_data;
980
981 av_lfg_init(&enc->randctx, 1);
982
983 enc->avctx = avctx;
984
985 enc->framesSinceKeyframe = 0;
986 if ((avctx->width & 0xf) || (avctx->height & 0xf)) {
987 av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n");
988 return AVERROR(EINVAL);
989 }
990
991 if (avctx->width > 65535 || avctx->height > 65535) {
992 av_log(avctx, AV_LOG_ERROR, "Dimensions are max %d\n", enc->quake3_compat ? 32768 : 65535);
993 return AVERROR(EINVAL);
994 }
995
996 if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1)))
997 av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two, this is not supported by quake\n");
998
999 enc->width = avctx->width;
1000 enc->height = avctx->height;
1001
1002 enc->framesSinceKeyframe = 0;
1003 enc->first_frame = 1;
1004
1005 enc->last_frame = av_frame_alloc();
1006 enc->current_frame = av_frame_alloc();
1007 if (!enc->last_frame || !enc->current_frame) {
1008 roq_encode_end(avctx);
1009 return AVERROR(ENOMEM);
1010 }
1011
1012 enc->tmpData = av_malloc(sizeof(RoqTempdata));
1013
1014 enc->this_motion4 =
1015 av_mallocz_array((enc->width*enc->height/16), sizeof(motion_vect));
1016
1017 enc->last_motion4 =
1018 av_malloc_array ((enc->width*enc->height/16), sizeof(motion_vect));
1019
1020 enc->this_motion8 =
1021 av_mallocz_array((enc->width*enc->height/64), sizeof(motion_vect));
1022
1023 enc->last_motion8 =
1024 av_malloc_array ((enc->width*enc->height/64), sizeof(motion_vect));
1025
1026 if (!enc->tmpData || !enc->this_motion4 || !enc->last_motion4 ||
1027 !enc->this_motion8 || !enc->last_motion8) {
1028 roq_encode_end(avctx);
1029 return AVERROR(ENOMEM);
1030 }
1031
1032 return 0;
1033 }
1034
roq_write_video_info_chunk(RoqContext * enc)1035 static void roq_write_video_info_chunk(RoqContext *enc)
1036 {
1037 /* ROQ info chunk */
1038 bytestream_put_le16(&enc->out_buf, RoQ_INFO);
1039
1040 /* Size: 8 bytes */
1041 bytestream_put_le32(&enc->out_buf, 8);
1042
1043 /* Unused argument */
1044 bytestream_put_byte(&enc->out_buf, 0x00);
1045 bytestream_put_byte(&enc->out_buf, 0x00);
1046
1047 /* Width */
1048 bytestream_put_le16(&enc->out_buf, enc->width);
1049
1050 /* Height */
1051 bytestream_put_le16(&enc->out_buf, enc->height);
1052
1053 /* Unused in Quake 3, mimics the output of the real encoder */
1054 bytestream_put_byte(&enc->out_buf, 0x08);
1055 bytestream_put_byte(&enc->out_buf, 0x00);
1056 bytestream_put_byte(&enc->out_buf, 0x04);
1057 bytestream_put_byte(&enc->out_buf, 0x00);
1058 }
1059
roq_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * frame,int * got_packet)1060 static int roq_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1061 const AVFrame *frame, int *got_packet)
1062 {
1063 RoqContext *enc = avctx->priv_data;
1064 int size, ret;
1065
1066 enc->avctx = avctx;
1067
1068 enc->frame_to_enc = frame;
1069
1070 if (frame->quality)
1071 enc->lambda = frame->quality - 1;
1072 else
1073 enc->lambda = 2*ROQ_LAMBDA_SCALE;
1074
1075 /* 138 bits max per 8x8 block +
1076 * 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header */
1077 size = ((enc->width * enc->height / 64) * 138 + 7) / 8 + 256 * (6 + 4) + 8;
1078 if ((ret = ff_alloc_packet2(avctx, pkt, size, 0)) < 0)
1079 return ret;
1080 enc->out_buf = pkt->data;
1081
1082 /* Check for I-frame */
1083 if (enc->framesSinceKeyframe == avctx->gop_size)
1084 enc->framesSinceKeyframe = 0;
1085
1086 if (enc->first_frame) {
1087 /* Alloc memory for the reconstruction data (we must know the stride
1088 for that) */
1089 if ((ret = ff_get_buffer(avctx, enc->current_frame, 0)) < 0 ||
1090 (ret = ff_get_buffer(avctx, enc->last_frame, 0)) < 0)
1091 return ret;
1092
1093 /* Before the first video frame, write a "video info" chunk */
1094 roq_write_video_info_chunk(enc);
1095
1096 enc->first_frame = 0;
1097 }
1098
1099 /* Encode the actual frame */
1100 ret = roq_encode_video(enc);
1101 if (ret < 0)
1102 return ret;
1103
1104 pkt->size = enc->out_buf - pkt->data;
1105 if (enc->framesSinceKeyframe == 1)
1106 pkt->flags |= AV_PKT_FLAG_KEY;
1107 *got_packet = 1;
1108
1109 return 0;
1110 }
1111
1112 #define OFFSET(x) offsetof(RoqContext, x)
1113 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1114 static const AVOption options[] = {
1115 { "quake3_compat", "Whether to respect known limitations in Quake 3 decoder", OFFSET(quake3_compat), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
1116 { NULL },
1117 };
1118
1119 static const AVClass roq_class = {
1120 .class_name = "RoQ",
1121 .item_name = av_default_item_name,
1122 .option = options,
1123 .version = LIBAVUTIL_VERSION_INT,
1124 };
1125
1126 AVCodec ff_roq_encoder = {
1127 .name = "roqvideo",
1128 .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),
1129 .type = AVMEDIA_TYPE_VIDEO,
1130 .id = AV_CODEC_ID_ROQ,
1131 .priv_data_size = sizeof(RoqContext),
1132 .init = roq_encode_init,
1133 .encode2 = roq_encode_frame,
1134 .close = roq_encode_end,
1135 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ444P,
1136 AV_PIX_FMT_NONE },
1137 .priv_class = &roq_class,
1138 };
1139