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
8 * This file is part of Libav.
10 * Libav 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.
15 * Libav 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.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with Libav; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 * id RoQ encoder by Vitor. Based on the Switchblade3 library and the
28 * Switchblade3 Libav glue by Eric Lasota.
36 * CODEBOOK - 2 + 8 bits
37 * SUBDIVIDE - 2 + combined subcel cost
42 * CODEBOOK - 2 + 8 bits
43 * SUBDIVIDE - 2 + 4*8 bits
45 * Maximum cost: 138 bits per cel
47 * Proper evaluation requires LCD fraction comparison, which requires
48 * Squared Error (SE) loss * savings increase
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)
59 #include "libavutil/attributes.h"
61 #include "bytestream.h"
69 * Maximum number of generated 4x4 codebooks. Can't be 256 to workaround a
72 #define MAX_CBS_4x4 255
74 #define MAX_CBS_2x2 256 ///< Maximum number of 2x2 codebooks.
76 /* The cast is useful when multiplying it by INT_MAX */
77 #define ROQ_LAMBDA_SCALE ((uint64_t) FF_LAMBDA_SCALE)
79 /* Macroblock support functions */
80 static void unpack_roq_cell(roq_cell *cell, uint8_t u[4*3])
82 memcpy(u , cell->y, 4);
83 memset(u+4, cell->u, 4);
84 memset(u+8, cell->v, 4);
87 static void unpack_roq_qcell(uint8_t cb2[], roq_qcell *qcell, uint8_t u[4*4*3])
90 static const int offsets[4] = {0, 2, 8, 10};
92 for (cp=0; cp<3; cp++)
94 u[4*4*cp + offsets[i] ] = cb2[qcell->idx[i]*2*2*3 + 4*cp ];
95 u[4*4*cp + offsets[i]+1] = cb2[qcell->idx[i]*2*2*3 + 4*cp+1];
96 u[4*4*cp + offsets[i]+4] = cb2[qcell->idx[i]*2*2*3 + 4*cp+2];
97 u[4*4*cp + offsets[i]+5] = cb2[qcell->idx[i]*2*2*3 + 4*cp+3];
102 static void enlarge_roq_mb4(uint8_t base[3*16], uint8_t u[3*64])
106 for(cp=0; cp<3; cp++)
109 *u++ = base[(y/2)*4 + (x/2) + 16*cp];
112 static inline int square(int x)
117 static inline int eval_sse(const uint8_t *a, const uint8_t *b, int count)
122 diff += square(*b++ - *a++);
127 // FIXME Could use DSPContext.sse, but it is not so speed critical (used
128 // just for motion estimation).
129 static int block_sse(uint8_t * const *buf1, uint8_t * const *buf2, int x1, int y1,
130 int x2, int y2, const int *stride1, const int *stride2, int size)
135 for (k=0; k<3; k++) {
136 int bias = (k ? CHROMA_BIAS : 4);
137 for (i=0; i<size; i++)
138 sse += bias*eval_sse(buf1[k] + (y1+i)*stride1[k] + x1,
139 buf2[k] + (y2+i)*stride2[k] + x2, size);
145 static int eval_motion_dist(RoqContext *enc, int x, int y, motion_vect vect,
151 if (mx < -7 || mx > 7)
154 if (my < -7 || my > 7)
160 if ((unsigned) mx > enc->width-size || (unsigned) my > enc->height-size)
163 return block_sse(enc->frame_to_enc->data, enc->last_frame->data, x, y,
165 enc->frame_to_enc->linesize, enc->last_frame->linesize,
170 * @return distortion between two macroblocks
172 static inline int squared_diff_macroblock(uint8_t a[], uint8_t b[], int size)
176 for(cp=0;cp<3;cp++) {
177 int bias = (cp ? CHROMA_BIAS : 4);
178 sdiff += bias*eval_sse(a, b, size*size);
186 typedef struct SubcelEvaluation {
196 typedef struct CelEvaluation {
200 SubcelEvaluation subCels[4];
205 int sourceX, sourceY;
208 typedef struct RoqCodebooks {
211 int usedCB2[MAX_CBS_2x2];
212 int usedCB4[MAX_CBS_4x4];
213 uint8_t unpacked_cb2[MAX_CBS_2x2*2*2*3];
214 uint8_t unpacked_cb4[MAX_CBS_4x4*4*4*3];
215 uint8_t unpacked_cb4_enlarged[MAX_CBS_4x4*8*8*3];
221 typedef struct RoqTempData
223 CelEvaluation *cel_evals;
225 int f2i4[MAX_CBS_4x4];
226 int i2f4[MAX_CBS_4x4];
227 int f2i2[MAX_CBS_2x2];
228 int i2f2[MAX_CBS_2x2];
235 RoqCodebooks codebooks;
242 * Initialize cel evaluators and set their source coordinates
244 static int create_cel_evals(RoqContext *enc, RoqTempdata *tempData)
248 tempData->cel_evals = av_malloc(enc->width*enc->height/64 * sizeof(CelEvaluation));
249 if (!tempData->cel_evals)
250 return AVERROR(ENOMEM);
252 /* Map to the ROQ quadtree order */
253 for (y=0; y<enc->height; y+=16)
254 for (x=0; x<enc->width; x+=16)
256 tempData->cel_evals[n ].sourceX = x + (i&1)*8;
257 tempData->cel_evals[n++].sourceY = y + (i&2)*4;
264 * Get macroblocks from parts of the image
266 static void get_frame_mb(const AVFrame *frame, int x, int y, uint8_t mb[], int dim)
270 for (cp=0; cp<3; cp++) {
271 int stride = frame->linesize[cp];
272 for (i=0; i<dim; i++)
273 for (j=0; j<dim; j++)
274 *mb++ = frame->data[cp][(y+i)*stride + x + j];
279 * Find the codebook with the lowest distortion from an image
281 static int index_mb(uint8_t cluster[], uint8_t cb[], int numCB,
282 int *outIndex, int dim)
284 int i, lDiff = INT_MAX, pick=0;
286 /* Diff against the others */
287 for (i=0; i<numCB; i++) {
288 int diff = squared_diff_macroblock(cluster, cb + i*dim*dim*3, dim);
299 #define EVAL_MOTION(MOTION) \
301 diff = eval_motion_dist(enc, j, i, MOTION, blocksize); \
303 if (diff < lowestdiff) { \
309 static void motion_search(RoqContext *enc, int blocksize)
311 static const motion_vect offsets[8] = {
322 int diff, lowestdiff, oldbest;
324 motion_vect bestpick = {{0,0}};
327 motion_vect *last_motion;
328 motion_vect *this_motion;
329 motion_vect vect, vect2;
331 int max=(enc->width/blocksize)*enc->height/blocksize;
333 if (blocksize == 4) {
334 last_motion = enc->last_motion4;
335 this_motion = enc->this_motion4;
337 last_motion = enc->last_motion8;
338 this_motion = enc->this_motion8;
341 for (i=0; i<enc->height; i+=blocksize)
342 for (j=0; j<enc->width; j+=blocksize) {
343 lowestdiff = eval_motion_dist(enc, j, i, (motion_vect) {{0,0}},
349 EVAL_MOTION(enc->this_motion8[(i/8)*(enc->width/8) + j/8]);
351 offset = (i/blocksize)*enc->width/blocksize + j/blocksize;
352 if (offset < max && offset >= 0)
353 EVAL_MOTION(last_motion[offset]);
356 if (offset < max && offset >= 0)
357 EVAL_MOTION(last_motion[offset]);
359 offset = (i/blocksize + 1)*enc->width/blocksize + j/blocksize;
360 if (offset < max && offset >= 0)
361 EVAL_MOTION(last_motion[offset]);
363 off[0]= (i/blocksize)*enc->width/blocksize + j/blocksize - 1;
364 off[1]= off[0] - enc->width/blocksize + 1;
370 vect.d[k]= mid_pred(this_motion[off[0]].d[k],
371 this_motion[off[1]].d[k],
372 this_motion[off[2]].d[k]);
376 EVAL_MOTION(this_motion[off[k]]);
378 EVAL_MOTION(this_motion[off[0]]);
383 while (oldbest != lowestdiff) {
384 oldbest = lowestdiff;
385 for (k=0; k<8; k++) {
387 vect2.d[0] += offsets[k].d[0];
388 vect2.d[1] += offsets[k].d[1];
393 offset = (i/blocksize)*enc->width/blocksize + j/blocksize;
394 this_motion[offset] = bestpick;
399 * Get distortion for all options available to a subcel
401 static void gather_data_for_subcel(SubcelEvaluation *subcel, int x,
402 int y, RoqContext *enc, RoqTempdata *tempData)
409 static const int bitsUsed[4] = {2, 10, 10, 34};
411 if (enc->framesSinceKeyframe >= 1) {
412 subcel->motion = enc->this_motion4[y*enc->width/16 + x/4];
414 subcel->eval_dist[RoQ_ID_FCC] =
415 eval_motion_dist(enc, x, y,
416 enc->this_motion4[y*enc->width/16 + x/4], 4);
418 subcel->eval_dist[RoQ_ID_FCC] = INT_MAX;
420 if (enc->framesSinceKeyframe >= 2)
421 subcel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data,
422 enc->current_frame->data, x,
424 enc->frame_to_enc->linesize,
425 enc->current_frame->linesize,
428 subcel->eval_dist[RoQ_ID_MOT] = INT_MAX;
430 cluster_index = y*enc->width/16 + x/4;
432 get_frame_mb(enc->frame_to_enc, x, y, mb4, 4);
434 subcel->eval_dist[RoQ_ID_SLD] = index_mb(mb4,
435 tempData->codebooks.unpacked_cb4,
436 tempData->codebooks.numCB4,
437 &subcel->cbEntry, 4);
439 subcel->eval_dist[RoQ_ID_CCC] = 0;
442 subcel->subCels[i] = tempData->closest_cb2[cluster_index*4+i];
444 get_frame_mb(enc->frame_to_enc, x+2*(i&1),
447 subcel->eval_dist[RoQ_ID_CCC] +=
448 squared_diff_macroblock(tempData->codebooks.unpacked_cb2 + subcel->subCels[i]*2*2*3, mb2, 2);
453 if (ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + enc->lambda*bitsUsed[i] <
455 subcel->best_coding = i;
456 subcel->best_bit_use = bitsUsed[i];
457 best_dist = ROQ_LAMBDA_SCALE*subcel->eval_dist[i] +
458 enc->lambda*bitsUsed[i];
463 * Get distortion for all options available to a cel
465 static void gather_data_for_cel(CelEvaluation *cel, RoqContext *enc,
466 RoqTempdata *tempData)
469 int index = cel->sourceY*enc->width/64 + cel->sourceX/8;
470 int i, j, best_dist, divide_bit_use;
472 int bitsUsed[4] = {2, 10, 10, 0};
474 if (enc->framesSinceKeyframe >= 1) {
475 cel->motion = enc->this_motion8[index];
477 cel->eval_dist[RoQ_ID_FCC] =
478 eval_motion_dist(enc, cel->sourceX, cel->sourceY,
479 enc->this_motion8[index], 8);
481 cel->eval_dist[RoQ_ID_FCC] = INT_MAX;
483 if (enc->framesSinceKeyframe >= 2)
484 cel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data,
485 enc->current_frame->data,
486 cel->sourceX, cel->sourceY,
487 cel->sourceX, cel->sourceY,
488 enc->frame_to_enc->linesize,
489 enc->current_frame->linesize,8);
491 cel->eval_dist[RoQ_ID_MOT] = INT_MAX;
493 get_frame_mb(enc->frame_to_enc, cel->sourceX, cel->sourceY, mb8, 8);
495 cel->eval_dist[RoQ_ID_SLD] =
496 index_mb(mb8, tempData->codebooks.unpacked_cb4_enlarged,
497 tempData->codebooks.numCB4, &cel->cbEntry, 8);
499 gather_data_for_subcel(cel->subCels + 0, cel->sourceX+0, cel->sourceY+0, enc, tempData);
500 gather_data_for_subcel(cel->subCels + 1, cel->sourceX+4, cel->sourceY+0, enc, tempData);
501 gather_data_for_subcel(cel->subCels + 2, cel->sourceX+0, cel->sourceY+4, enc, tempData);
502 gather_data_for_subcel(cel->subCels + 3, cel->sourceX+4, cel->sourceY+4, enc, tempData);
504 cel->eval_dist[RoQ_ID_CCC] = 0;
506 for (i=0; i<4; i++) {
507 cel->eval_dist[RoQ_ID_CCC] +=
508 cel->subCels[i].eval_dist[cel->subCels[i].best_coding];
509 divide_bit_use += cel->subCels[i].best_bit_use;
513 bitsUsed[3] = 2 + divide_bit_use;
516 if (ROQ_LAMBDA_SCALE*cel->eval_dist[i] + enc->lambda*bitsUsed[i] <
518 cel->best_coding = i;
519 best_dist = ROQ_LAMBDA_SCALE*cel->eval_dist[i] +
520 enc->lambda*bitsUsed[i];
523 tempData->used_option[cel->best_coding]++;
524 tempData->mainChunkSize += bitsUsed[cel->best_coding];
526 if (cel->best_coding == RoQ_ID_SLD)
527 tempData->codebooks.usedCB4[cel->cbEntry]++;
529 if (cel->best_coding == RoQ_ID_CCC)
530 for (i=0; i<4; i++) {
531 if (cel->subCels[i].best_coding == RoQ_ID_SLD)
532 tempData->codebooks.usedCB4[cel->subCels[i].cbEntry]++;
533 else if (cel->subCels[i].best_coding == RoQ_ID_CCC)
535 tempData->codebooks.usedCB2[cel->subCels[i].subCels[j]]++;
539 static void remap_codebooks(RoqContext *enc, RoqTempdata *tempData)
543 /* Make remaps for the final codebook usage */
544 for (i=0; i<MAX_CBS_4x4; i++) {
545 if (tempData->codebooks.usedCB4[i]) {
546 tempData->i2f4[i] = idx;
547 tempData->f2i4[idx] = i;
549 tempData->codebooks.usedCB2[enc->cb4x4[i].idx[j]]++;
554 tempData->numCB4 = idx;
557 for (i=0; i<MAX_CBS_2x2; i++) {
558 if (tempData->codebooks.usedCB2[i]) {
559 tempData->i2f2[i] = idx;
560 tempData->f2i2[idx] = i;
564 tempData->numCB2 = idx;
569 * Write codebook chunk
571 static void write_codebooks(RoqContext *enc, RoqTempdata *tempData)
574 uint8_t **outp= &enc->out_buf;
576 if (tempData->numCB2) {
577 bytestream_put_le16(outp, RoQ_QUAD_CODEBOOK);
578 bytestream_put_le32(outp, tempData->numCB2*6 + tempData->numCB4*4);
579 bytestream_put_byte(outp, tempData->numCB4);
580 bytestream_put_byte(outp, tempData->numCB2);
582 for (i=0; i<tempData->numCB2; i++) {
583 bytestream_put_buffer(outp, enc->cb2x2[tempData->f2i2[i]].y, 4);
584 bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].u);
585 bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].v);
588 for (i=0; i<tempData->numCB4; i++)
590 bytestream_put_byte(outp, tempData->i2f2[enc->cb4x4[tempData->f2i4[i]].idx[j]]);
595 static inline uint8_t motion_arg(motion_vect mot)
597 uint8_t ax = 8 - ((uint8_t) mot.d[0]);
598 uint8_t ay = 8 - ((uint8_t) mot.d[1]);
599 return ((ax&15)<<4) | (ay&15);
602 typedef struct CodingSpool {
605 uint8_t argumentSpool[64];
610 /* NOTE: Typecodes must be spooled AFTER arguments!! */
611 static void write_typecode(CodingSpool *s, uint8_t type)
613 s->typeSpool |= (type & 3) << (14 - s->typeSpoolLength);
614 s->typeSpoolLength += 2;
615 if (s->typeSpoolLength == 16) {
616 bytestream_put_le16(s->pout, s->typeSpool);
617 bytestream_put_buffer(s->pout, s->argumentSpool,
618 s->args - s->argumentSpool);
619 s->typeSpoolLength = 0;
621 s->args = s->argumentSpool;
625 static void reconstruct_and_encode_image(RoqContext *enc, RoqTempdata *tempData, int w, int h, int numBlocks)
638 spool.typeSpoolLength=0;
639 spool.args = spool.argumentSpool;
640 spool.pout = &enc->out_buf;
642 if (tempData->used_option[RoQ_ID_CCC]%2)
643 tempData->mainChunkSize+=8; //FIXME
645 /* Write the video chunk header */
646 bytestream_put_le16(&enc->out_buf, RoQ_QUAD_VQ);
647 bytestream_put_le32(&enc->out_buf, tempData->mainChunkSize/8);
648 bytestream_put_byte(&enc->out_buf, 0x0);
649 bytestream_put_byte(&enc->out_buf, 0x0);
651 for (i=0; i<numBlocks; i++) {
652 eval = tempData->cel_evals + i;
656 dist += eval->eval_dist[eval->best_coding];
658 switch (eval->best_coding) {
660 write_typecode(&spool, RoQ_ID_MOT);
664 bytestream_put_byte(&spool.args, motion_arg(eval->motion));
666 write_typecode(&spool, RoQ_ID_FCC);
667 ff_apply_motion_8x8(enc, x, y,
668 eval->motion.d[0], eval->motion.d[1]);
672 bytestream_put_byte(&spool.args, tempData->i2f4[eval->cbEntry]);
673 write_typecode(&spool, RoQ_ID_SLD);
675 qcell = enc->cb4x4 + eval->cbEntry;
676 ff_apply_vector_4x4(enc, x , y , enc->cb2x2 + qcell->idx[0]);
677 ff_apply_vector_4x4(enc, x+4, y , enc->cb2x2 + qcell->idx[1]);
678 ff_apply_vector_4x4(enc, x , y+4, enc->cb2x2 + qcell->idx[2]);
679 ff_apply_vector_4x4(enc, x+4, y+4, enc->cb2x2 + qcell->idx[3]);
683 write_typecode(&spool, RoQ_ID_CCC);
685 for (j=0; j<4; j++) {
689 switch(eval->subCels[j].best_coding) {
694 bytestream_put_byte(&spool.args,
695 motion_arg(eval->subCels[j].motion));
697 ff_apply_motion_4x4(enc, subX, subY,
698 eval->subCels[j].motion.d[0],
699 eval->subCels[j].motion.d[1]);
703 bytestream_put_byte(&spool.args,
704 tempData->i2f4[eval->subCels[j].cbEntry]);
706 qcell = enc->cb4x4 + eval->subCels[j].cbEntry;
708 ff_apply_vector_2x2(enc, subX , subY ,
709 enc->cb2x2 + qcell->idx[0]);
710 ff_apply_vector_2x2(enc, subX+2, subY ,
711 enc->cb2x2 + qcell->idx[1]);
712 ff_apply_vector_2x2(enc, subX , subY+2,
713 enc->cb2x2 + qcell->idx[2]);
714 ff_apply_vector_2x2(enc, subX+2, subY+2,
715 enc->cb2x2 + qcell->idx[3]);
719 for (k=0; k<4; k++) {
720 int cb_idx = eval->subCels[j].subCels[k];
721 bytestream_put_byte(&spool.args,
722 tempData->i2f2[cb_idx]);
724 ff_apply_vector_2x2(enc, subX + 2*(k&1), subY + (k&2),
725 enc->cb2x2 + cb_idx);
729 write_typecode(&spool, eval->subCels[j].best_coding);
735 /* Flush the remainder of the argument/type spool */
736 while (spool.typeSpoolLength)
737 write_typecode(&spool, 0x0);
742 * Create a single YUV cell from a 2x2 section of the image
744 static inline void frame_block_to_cell(uint8_t *block, uint8_t * const *data,
745 int top, int left, const int *stride)
750 for (j=0; j<2; j++) {
751 int x = (top+i)*stride[0] + left + j;
752 *block++ = data[0][x];
753 x = (top+i)*stride[1] + left + j;
763 * Create YUV clusters for the entire image
765 static void create_clusters(const AVFrame *frame, int w, int h, uint8_t *yuvClusters)
770 for (j=0; j<w; j+=4) {
771 for (k=0; k < 2; k++)
772 for (l=0; l < 2; l++)
773 frame_block_to_cell(yuvClusters + (l + 2*k)*6, frame->data,
774 i+2*k, j+2*l, frame->linesize);
779 static int generate_codebook(RoqContext *enc, RoqTempdata *tempdata,
780 int *points, int inputCount, roq_cell *results,
781 int size, int cbsize)
783 int i, j, k, ret = 0;
784 int c_size = size*size/4;
786 int *codebook = av_malloc(6*c_size*cbsize*sizeof(int));
790 return AVERROR(ENOMEM);
793 closest_cb = av_malloc(6*c_size*inputCount*sizeof(int));
795 ret = AVERROR(ENOMEM);
799 closest_cb = tempdata->closest_cb2;
801 ret = ff_init_elbg(points, 6 * c_size, inputCount, codebook,
802 cbsize, 1, closest_cb, &enc->randctx);
805 ret = ff_do_elbg(points, 6 * c_size, inputCount, codebook,
806 cbsize, 1, closest_cb, &enc->randctx);
811 for (i=0; i<cbsize; i++)
812 for (k=0; k<c_size; k++) {
814 results->y[j] = *buf++;
816 results->u = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS;
817 results->v = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS;
827 static int generate_new_codebooks(RoqContext *enc, RoqTempdata *tempData)
830 RoqCodebooks *codebooks = &tempData->codebooks;
831 int max = enc->width*enc->height/16;
833 roq_cell *results4 = av_malloc(sizeof(roq_cell)*MAX_CBS_4x4*4);
834 uint8_t *yuvClusters=av_malloc(sizeof(int)*max*6*4);
835 int *points = av_malloc(max*6*4*sizeof(int));
838 if (!results4 || !yuvClusters || !points) {
839 ret = AVERROR(ENOMEM);
843 /* Subsample YUV data */
844 create_clusters(enc->frame_to_enc, enc->width, enc->height, yuvClusters);
846 /* Cast to integer and apply chroma bias */
847 for (i=0; i<max*24; i++) {
848 bias = ((i%6)<4) ? 1 : CHROMA_BIAS;
849 points[i] = bias*yuvClusters[i];
852 /* Create 4x4 codebooks */
853 if ((ret = generate_codebook(enc, tempData, points, max,
854 results4, 4, MAX_CBS_4x4)) < 0)
857 codebooks->numCB4 = MAX_CBS_4x4;
859 tempData->closest_cb2 = av_malloc(max*4*sizeof(int));
860 if (!tempData->closest_cb2) {
861 ret = AVERROR(ENOMEM);
865 /* Create 2x2 codebooks */
866 if ((ret = generate_codebook(enc, tempData, points, max * 4,
867 enc->cb2x2, 2, MAX_CBS_2x2)) < 0)
870 codebooks->numCB2 = MAX_CBS_2x2;
872 /* Unpack 2x2 codebook clusters */
873 for (i=0; i<codebooks->numCB2; i++)
874 unpack_roq_cell(enc->cb2x2 + i, codebooks->unpacked_cb2 + i*2*2*3);
876 /* Index all 4x4 entries to the 2x2 entries, unpack, and enlarge */
877 for (i=0; i<codebooks->numCB4; i++) {
878 for (j=0; j<4; j++) {
879 unpack_roq_cell(&results4[4*i + j], mb2);
880 index_mb(mb2, codebooks->unpacked_cb2, codebooks->numCB2,
881 &enc->cb4x4[i].idx[j], 2);
883 unpack_roq_qcell(codebooks->unpacked_cb2, enc->cb4x4 + i,
884 codebooks->unpacked_cb4 + i*4*4*3);
885 enlarge_roq_mb4(codebooks->unpacked_cb4 + i*4*4*3,
886 codebooks->unpacked_cb4_enlarged + i*8*8*3);
889 av_free(yuvClusters);
895 static int roq_encode_video(RoqContext *enc)
897 RoqTempdata *tempData = enc->tmpData;
900 memset(tempData, 0, sizeof(*tempData));
902 ret = create_cel_evals(enc, tempData);
906 ret = generate_new_codebooks(enc, tempData);
910 if (enc->framesSinceKeyframe >= 1) {
911 motion_search(enc, 8);
912 motion_search(enc, 4);
916 for (i=0; i<enc->width*enc->height/64; i++)
917 gather_data_for_cel(tempData->cel_evals + i, enc, tempData);
919 /* Quake 3 can't handle chunks bigger than 65535 bytes */
920 if (tempData->mainChunkSize/8 > 65535) {
921 av_log(enc->avctx, AV_LOG_ERROR,
922 "Warning, generated a frame too big (%d > 65535), "
923 "try using a smaller qscale value.\n",
924 tempData->mainChunkSize/8);
926 tempData->mainChunkSize = 0;
927 memset(tempData->used_option, 0, sizeof(tempData->used_option));
928 memset(tempData->codebooks.usedCB4, 0,
929 sizeof(tempData->codebooks.usedCB4));
930 memset(tempData->codebooks.usedCB2, 0,
931 sizeof(tempData->codebooks.usedCB2));
936 remap_codebooks(enc, tempData);
938 write_codebooks(enc, tempData);
940 reconstruct_and_encode_image(enc, tempData, enc->width, enc->height,
941 enc->width*enc->height/64);
943 /* Rotate frame history */
944 FFSWAP(AVFrame *, enc->current_frame, enc->last_frame);
945 FFSWAP(motion_vect *, enc->last_motion4, enc->this_motion4);
946 FFSWAP(motion_vect *, enc->last_motion8, enc->this_motion8);
948 av_free(tempData->cel_evals);
949 av_free(tempData->closest_cb2);
951 enc->framesSinceKeyframe++;
956 static av_cold int roq_encode_end(AVCodecContext *avctx)
958 RoqContext *enc = avctx->priv_data;
960 av_frame_free(&enc->current_frame);
961 av_frame_free(&enc->last_frame);
963 av_free(enc->tmpData);
964 av_free(enc->this_motion4);
965 av_free(enc->last_motion4);
966 av_free(enc->this_motion8);
967 av_free(enc->last_motion8);
972 static av_cold int roq_encode_init(AVCodecContext *avctx)
974 RoqContext *enc = avctx->priv_data;
976 av_lfg_init(&enc->randctx, 1);
980 enc->framesSinceKeyframe = 0;
981 if ((avctx->width & 0xf) || (avctx->height & 0xf)) {
982 av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n");
986 if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1)))
987 av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two\n");
989 enc->width = avctx->width;
990 enc->height = avctx->height;
992 enc->framesSinceKeyframe = 0;
993 enc->first_frame = 1;
995 enc->last_frame = av_frame_alloc();
996 enc->current_frame = av_frame_alloc();
997 if (!enc->last_frame || !enc->current_frame) {
998 roq_encode_end(avctx);
999 return AVERROR(ENOMEM);
1002 enc->tmpData = av_malloc(sizeof(RoqTempdata));
1005 av_mallocz((enc->width*enc->height/16)*sizeof(motion_vect));
1008 av_malloc ((enc->width*enc->height/16)*sizeof(motion_vect));
1011 av_mallocz((enc->width*enc->height/64)*sizeof(motion_vect));
1014 av_malloc ((enc->width*enc->height/64)*sizeof(motion_vect));
1019 static void roq_write_video_info_chunk(RoqContext *enc)
1021 /* ROQ info chunk */
1022 bytestream_put_le16(&enc->out_buf, RoQ_INFO);
1025 bytestream_put_le32(&enc->out_buf, 8);
1027 /* Unused argument */
1028 bytestream_put_byte(&enc->out_buf, 0x00);
1029 bytestream_put_byte(&enc->out_buf, 0x00);
1032 bytestream_put_le16(&enc->out_buf, enc->width);
1035 bytestream_put_le16(&enc->out_buf, enc->height);
1037 /* Unused in Quake 3, mimics the output of the real encoder */
1038 bytestream_put_byte(&enc->out_buf, 0x08);
1039 bytestream_put_byte(&enc->out_buf, 0x00);
1040 bytestream_put_byte(&enc->out_buf, 0x04);
1041 bytestream_put_byte(&enc->out_buf, 0x00);
1044 static int roq_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1045 const AVFrame *frame, int *got_packet)
1047 RoqContext *enc = avctx->priv_data;
1052 enc->frame_to_enc = frame;
1055 enc->lambda = frame->quality - 1;
1057 enc->lambda = 2*ROQ_LAMBDA_SCALE;
1059 /* 138 bits max per 8x8 block +
1060 * 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header */
1061 size = ((enc->width * enc->height / 64) * 138 + 7) / 8 + 256 * (6 + 4) + 8;
1062 if ((ret = ff_alloc_packet(pkt, size)) < 0) {
1063 av_log(avctx, AV_LOG_ERROR, "Error getting output packet with size %d.\n", size);
1066 enc->out_buf = pkt->data;
1068 /* Check for I-frame */
1069 if (enc->framesSinceKeyframe == avctx->gop_size)
1070 enc->framesSinceKeyframe = 0;
1072 if (enc->first_frame) {
1073 /* Alloc memory for the reconstruction data (we must know the stride
1075 if (ff_get_buffer(avctx, enc->current_frame, 0) ||
1076 ff_get_buffer(avctx, enc->last_frame, 0)) {
1077 av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
1081 /* Before the first video frame, write a "video info" chunk */
1082 roq_write_video_info_chunk(enc);
1084 enc->first_frame = 0;
1087 /* Encode the actual frame */
1088 ret = roq_encode_video(enc);
1092 pkt->size = enc->out_buf - pkt->data;
1093 if (enc->framesSinceKeyframe == 1)
1094 pkt->flags |= AV_PKT_FLAG_KEY;
1100 AVCodec ff_roq_encoder = {
1102 .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),
1103 .type = AVMEDIA_TYPE_VIDEO,
1104 .id = AV_CODEC_ID_ROQ,
1105 .priv_data_size = sizeof(RoqContext),
1106 .init = roq_encode_init,
1107 .encode2 = roq_encode_frame,
1108 .close = roq_encode_end,
1109 .supported_framerates = (const AVRational[]){ {30,1}, {0,0} },
1110 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV444P,