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)
60 #include "bytestream.h"
68 * Maximum number of generated 4x4 codebooks. Can't be 256 to workaround a
71 #define MAX_CBS_4x4 255
73 #define MAX_CBS_2x2 256 ///< Maximum number of 2x2 codebooks.
75 /* The cast is useful when multiplying it by INT_MAX */
76 #define ROQ_LAMBDA_SCALE ((uint64_t) FF_LAMBDA_SCALE)
78 /* Macroblock support functions */
79 static void unpack_roq_cell(roq_cell *cell, uint8_t u[4*3])
81 memcpy(u , cell->y, 4);
82 memset(u+4, cell->u, 4);
83 memset(u+8, cell->v, 4);
86 static void unpack_roq_qcell(uint8_t cb2[], roq_qcell *qcell, uint8_t u[4*4*3])
89 static const int offsets[4] = {0, 2, 8, 10};
91 for (cp=0; cp<3; cp++)
93 u[4*4*cp + offsets[i] ] = cb2[qcell->idx[i]*2*2*3 + 4*cp ];
94 u[4*4*cp + offsets[i]+1] = cb2[qcell->idx[i]*2*2*3 + 4*cp+1];
95 u[4*4*cp + offsets[i]+4] = cb2[qcell->idx[i]*2*2*3 + 4*cp+2];
96 u[4*4*cp + offsets[i]+5] = cb2[qcell->idx[i]*2*2*3 + 4*cp+3];
101 static void enlarge_roq_mb4(uint8_t base[3*16], uint8_t u[3*64])
105 for(cp=0; cp<3; cp++)
108 *u++ = base[(y/2)*4 + (x/2) + 16*cp];
111 static inline int square(int x)
116 static inline int eval_sse(const uint8_t *a, const uint8_t *b, int count)
121 diff += square(*b++ - *a++);
126 // FIXME Could use DSPContext.sse, but it is not so speed critical (used
127 // just for motion estimation).
128 static int block_sse(uint8_t * const *buf1, uint8_t * const *buf2, int x1, int y1,
129 int x2, int y2, const int *stride1, const int *stride2, int size)
134 for (k=0; k<3; k++) {
135 int bias = (k ? CHROMA_BIAS : 4);
136 for (i=0; i<size; i++)
137 sse += bias*eval_sse(buf1[k] + (y1+i)*stride1[k] + x1,
138 buf2[k] + (y2+i)*stride2[k] + x2, size);
144 static int eval_motion_dist(RoqContext *enc, int x, int y, motion_vect vect,
150 if (mx < -7 || mx > 7)
153 if (my < -7 || my > 7)
159 if ((unsigned) mx > enc->width-size || (unsigned) my > enc->height-size)
162 return block_sse(enc->frame_to_enc->data, enc->last_frame->data, x, y,
164 enc->frame_to_enc->linesize, enc->last_frame->linesize,
169 * @return distortion between two macroblocks
171 static inline int squared_diff_macroblock(uint8_t a[], uint8_t b[], int size)
175 for(cp=0;cp<3;cp++) {
176 int bias = (cp ? CHROMA_BIAS : 4);
177 sdiff += bias*eval_sse(a, b, size*size);
201 SubcelEvaluation subCels[4];
206 int sourceX, sourceY;
213 int usedCB2[MAX_CBS_2x2];
214 int usedCB4[MAX_CBS_4x4];
215 uint8_t unpacked_cb2[MAX_CBS_2x2*2*2*3];
216 uint8_t unpacked_cb4[MAX_CBS_4x4*4*4*3];
217 uint8_t unpacked_cb4_enlarged[MAX_CBS_4x4*8*8*3];
223 typedef struct RoqTempData
225 CelEvaluation *cel_evals;
227 int f2i4[MAX_CBS_4x4];
228 int i2f4[MAX_CBS_4x4];
229 int f2i2[MAX_CBS_2x2];
230 int i2f2[MAX_CBS_2x2];
237 RoqCodebooks codebooks;
244 * Initialize cel evaluators and set their source coordinates
246 static void create_cel_evals(RoqContext *enc, RoqTempdata *tempData)
250 tempData->cel_evals = av_malloc(enc->width*enc->height/64 * sizeof(CelEvaluation));
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;
262 * Get macroblocks from parts of the image
264 static void get_frame_mb(const AVFrame *frame, int x, int y, uint8_t mb[], int dim)
268 for (cp=0; cp<3; cp++) {
269 int stride = frame->linesize[cp];
270 for (i=0; i<dim; i++)
271 for (j=0; j<dim; j++)
272 *mb++ = frame->data[cp][(y+i)*stride + x + j];
277 * Find the codebook with the lowest distortion from an image
279 static int index_mb(uint8_t cluster[], uint8_t cb[], int numCB,
280 int *outIndex, int dim)
282 int i, lDiff = INT_MAX, pick=0;
284 /* Diff against the others */
285 for (i=0; i<numCB; i++) {
286 int diff = squared_diff_macroblock(cluster, cb + i*dim*dim*3, dim);
297 #define EVAL_MOTION(MOTION) \
299 diff = eval_motion_dist(enc, j, i, MOTION, blocksize); \
301 if (diff < lowestdiff) { \
307 static void motion_search(RoqContext *enc, int blocksize)
309 static const motion_vect offsets[8] = {
320 int diff, lowestdiff, oldbest;
322 motion_vect bestpick = {{0,0}};
325 motion_vect *last_motion;
326 motion_vect *this_motion;
327 motion_vect vect, vect2;
329 int max=(enc->width/blocksize)*enc->height/blocksize;
331 if (blocksize == 4) {
332 last_motion = enc->last_motion4;
333 this_motion = enc->this_motion4;
335 last_motion = enc->last_motion8;
336 this_motion = enc->this_motion8;
339 for (i=0; i<enc->height; i+=blocksize)
340 for (j=0; j<enc->width; j+=blocksize) {
341 lowestdiff = eval_motion_dist(enc, j, i, (motion_vect) {{0,0}},
347 EVAL_MOTION(enc->this_motion8[(i/8)*(enc->width/8) + j/8]);
349 offset = (i/blocksize)*enc->width/blocksize + j/blocksize;
350 if (offset < max && offset >= 0)
351 EVAL_MOTION(last_motion[offset]);
354 if (offset < max && offset >= 0)
355 EVAL_MOTION(last_motion[offset]);
357 offset = (i/blocksize + 1)*enc->width/blocksize + j/blocksize;
358 if (offset < max && offset >= 0)
359 EVAL_MOTION(last_motion[offset]);
361 off[0]= (i/blocksize)*enc->width/blocksize + j/blocksize - 1;
362 off[1]= off[0] - enc->width/blocksize + 1;
368 vect.d[k]= mid_pred(this_motion[off[0]].d[k],
369 this_motion[off[1]].d[k],
370 this_motion[off[2]].d[k]);
374 EVAL_MOTION(this_motion[off[k]]);
376 EVAL_MOTION(this_motion[off[0]]);
381 while (oldbest != lowestdiff) {
382 oldbest = lowestdiff;
383 for (k=0; k<8; k++) {
385 vect2.d[0] += offsets[k].d[0];
386 vect2.d[1] += offsets[k].d[1];
391 offset = (i/blocksize)*enc->width/blocksize + j/blocksize;
392 this_motion[offset] = bestpick;
397 * Get distortion for all options available to a subcel
399 static void gather_data_for_subcel(SubcelEvaluation *subcel, int x,
400 int y, RoqContext *enc, RoqTempdata *tempData)
407 static const int bitsUsed[4] = {2, 10, 10, 34};
409 if (enc->framesSinceKeyframe >= 1) {
410 subcel->motion = enc->this_motion4[y*enc->width/16 + x/4];
412 subcel->eval_dist[RoQ_ID_FCC] =
413 eval_motion_dist(enc, x, y,
414 enc->this_motion4[y*enc->width/16 + x/4], 4);
416 subcel->eval_dist[RoQ_ID_FCC] = INT_MAX;
418 if (enc->framesSinceKeyframe >= 2)
419 subcel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data,
420 enc->current_frame->data, x,
422 enc->frame_to_enc->linesize,
423 enc->current_frame->linesize,
426 subcel->eval_dist[RoQ_ID_MOT] = INT_MAX;
428 cluster_index = y*enc->width/16 + x/4;
430 get_frame_mb(enc->frame_to_enc, x, y, mb4, 4);
432 subcel->eval_dist[RoQ_ID_SLD] = index_mb(mb4,
433 tempData->codebooks.unpacked_cb4,
434 tempData->codebooks.numCB4,
435 &subcel->cbEntry, 4);
437 subcel->eval_dist[RoQ_ID_CCC] = 0;
440 subcel->subCels[i] = tempData->closest_cb2[cluster_index*4+i];
442 get_frame_mb(enc->frame_to_enc, x+2*(i&1),
445 subcel->eval_dist[RoQ_ID_CCC] +=
446 squared_diff_macroblock(tempData->codebooks.unpacked_cb2 + subcel->subCels[i]*2*2*3, mb2, 2);
451 if (ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + enc->lambda*bitsUsed[i] <
453 subcel->best_coding = i;
454 subcel->best_bit_use = bitsUsed[i];
455 best_dist = ROQ_LAMBDA_SCALE*subcel->eval_dist[i] +
456 enc->lambda*bitsUsed[i];
461 * Get distortion for all options available to a cel
463 static void gather_data_for_cel(CelEvaluation *cel, RoqContext *enc,
464 RoqTempdata *tempData)
467 int index = cel->sourceY*enc->width/64 + cel->sourceX/8;
468 int i, j, best_dist, divide_bit_use;
470 int bitsUsed[4] = {2, 10, 10, 0};
472 if (enc->framesSinceKeyframe >= 1) {
473 cel->motion = enc->this_motion8[index];
475 cel->eval_dist[RoQ_ID_FCC] =
476 eval_motion_dist(enc, cel->sourceX, cel->sourceY,
477 enc->this_motion8[index], 8);
479 cel->eval_dist[RoQ_ID_FCC] = INT_MAX;
481 if (enc->framesSinceKeyframe >= 2)
482 cel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data,
483 enc->current_frame->data,
484 cel->sourceX, cel->sourceY,
485 cel->sourceX, cel->sourceY,
486 enc->frame_to_enc->linesize,
487 enc->current_frame->linesize,8);
489 cel->eval_dist[RoQ_ID_MOT] = INT_MAX;
491 get_frame_mb(enc->frame_to_enc, cel->sourceX, cel->sourceY, mb8, 8);
493 cel->eval_dist[RoQ_ID_SLD] =
494 index_mb(mb8, tempData->codebooks.unpacked_cb4_enlarged,
495 tempData->codebooks.numCB4, &cel->cbEntry, 8);
497 gather_data_for_subcel(cel->subCels + 0, cel->sourceX+0, cel->sourceY+0, enc, tempData);
498 gather_data_for_subcel(cel->subCels + 1, cel->sourceX+4, cel->sourceY+0, enc, tempData);
499 gather_data_for_subcel(cel->subCels + 2, cel->sourceX+0, cel->sourceY+4, enc, tempData);
500 gather_data_for_subcel(cel->subCels + 3, cel->sourceX+4, cel->sourceY+4, enc, tempData);
502 cel->eval_dist[RoQ_ID_CCC] = 0;
504 for (i=0; i<4; i++) {
505 cel->eval_dist[RoQ_ID_CCC] +=
506 cel->subCels[i].eval_dist[cel->subCels[i].best_coding];
507 divide_bit_use += cel->subCels[i].best_bit_use;
511 bitsUsed[3] = 2 + divide_bit_use;
514 if (ROQ_LAMBDA_SCALE*cel->eval_dist[i] + enc->lambda*bitsUsed[i] <
516 cel->best_coding = i;
517 best_dist = ROQ_LAMBDA_SCALE*cel->eval_dist[i] +
518 enc->lambda*bitsUsed[i];
521 tempData->used_option[cel->best_coding]++;
522 tempData->mainChunkSize += bitsUsed[cel->best_coding];
524 if (cel->best_coding == RoQ_ID_SLD)
525 tempData->codebooks.usedCB4[cel->cbEntry]++;
527 if (cel->best_coding == RoQ_ID_CCC)
528 for (i=0; i<4; i++) {
529 if (cel->subCels[i].best_coding == RoQ_ID_SLD)
530 tempData->codebooks.usedCB4[cel->subCels[i].cbEntry]++;
531 else if (cel->subCels[i].best_coding == RoQ_ID_CCC)
533 tempData->codebooks.usedCB2[cel->subCels[i].subCels[j]]++;
537 static void remap_codebooks(RoqContext *enc, RoqTempdata *tempData)
541 /* Make remaps for the final codebook usage */
542 for (i=0; i<MAX_CBS_4x4; i++) {
543 if (tempData->codebooks.usedCB4[i]) {
544 tempData->i2f4[i] = idx;
545 tempData->f2i4[idx] = i;
547 tempData->codebooks.usedCB2[enc->cb4x4[i].idx[j]]++;
552 tempData->numCB4 = idx;
555 for (i=0; i<MAX_CBS_2x2; i++) {
556 if (tempData->codebooks.usedCB2[i]) {
557 tempData->i2f2[i] = idx;
558 tempData->f2i2[idx] = i;
562 tempData->numCB2 = idx;
567 * Write codebook chunk
569 static void write_codebooks(RoqContext *enc, RoqTempdata *tempData)
572 uint8_t **outp= &enc->out_buf;
574 if (tempData->numCB2) {
575 bytestream_put_le16(outp, RoQ_QUAD_CODEBOOK);
576 bytestream_put_le32(outp, tempData->numCB2*6 + tempData->numCB4*4);
577 bytestream_put_byte(outp, tempData->numCB4);
578 bytestream_put_byte(outp, tempData->numCB2);
580 for (i=0; i<tempData->numCB2; i++) {
581 bytestream_put_buffer(outp, enc->cb2x2[tempData->f2i2[i]].y, 4);
582 bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].u);
583 bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].v);
586 for (i=0; i<tempData->numCB4; i++)
588 bytestream_put_byte(outp, tempData->i2f2[enc->cb4x4[tempData->f2i4[i]].idx[j]]);
593 static inline uint8_t motion_arg(motion_vect mot)
595 uint8_t ax = 8 - ((uint8_t) mot.d[0]);
596 uint8_t ay = 8 - ((uint8_t) mot.d[1]);
597 return ((ax&15)<<4) | (ay&15);
604 uint8_t argumentSpool[64];
609 /* NOTE: Typecodes must be spooled AFTER arguments!! */
610 static void write_typecode(CodingSpool *s, uint8_t type)
612 s->typeSpool |= (type & 3) << (14 - s->typeSpoolLength);
613 s->typeSpoolLength += 2;
614 if (s->typeSpoolLength == 16) {
615 bytestream_put_le16(s->pout, s->typeSpool);
616 bytestream_put_buffer(s->pout, s->argumentSpool,
617 s->args - s->argumentSpool);
618 s->typeSpoolLength = 0;
620 s->args = s->argumentSpool;
624 static void reconstruct_and_encode_image(RoqContext *enc, RoqTempdata *tempData, int w, int h, int numBlocks)
637 spool.typeSpoolLength=0;
638 spool.args = spool.argumentSpool;
639 spool.pout = &enc->out_buf;
641 if (tempData->used_option[RoQ_ID_CCC]%2)
642 tempData->mainChunkSize+=8; //FIXME
644 /* Write the video chunk header */
645 bytestream_put_le16(&enc->out_buf, RoQ_QUAD_VQ);
646 bytestream_put_le32(&enc->out_buf, tempData->mainChunkSize/8);
647 bytestream_put_byte(&enc->out_buf, 0x0);
648 bytestream_put_byte(&enc->out_buf, 0x0);
650 for (i=0; i<numBlocks; i++) {
651 eval = tempData->cel_evals + i;
655 dist += eval->eval_dist[eval->best_coding];
657 switch (eval->best_coding) {
659 write_typecode(&spool, RoQ_ID_MOT);
663 bytestream_put_byte(&spool.args, motion_arg(eval->motion));
665 write_typecode(&spool, RoQ_ID_FCC);
666 ff_apply_motion_8x8(enc, x, y,
667 eval->motion.d[0], eval->motion.d[1]);
671 bytestream_put_byte(&spool.args, tempData->i2f4[eval->cbEntry]);
672 write_typecode(&spool, RoQ_ID_SLD);
674 qcell = enc->cb4x4 + eval->cbEntry;
675 ff_apply_vector_4x4(enc, x , y , enc->cb2x2 + qcell->idx[0]);
676 ff_apply_vector_4x4(enc, x+4, y , enc->cb2x2 + qcell->idx[1]);
677 ff_apply_vector_4x4(enc, x , y+4, enc->cb2x2 + qcell->idx[2]);
678 ff_apply_vector_4x4(enc, x+4, y+4, enc->cb2x2 + qcell->idx[3]);
682 write_typecode(&spool, RoQ_ID_CCC);
684 for (j=0; j<4; j++) {
688 switch(eval->subCels[j].best_coding) {
693 bytestream_put_byte(&spool.args,
694 motion_arg(eval->subCels[j].motion));
696 ff_apply_motion_4x4(enc, subX, subY,
697 eval->subCels[j].motion.d[0],
698 eval->subCels[j].motion.d[1]);
702 bytestream_put_byte(&spool.args,
703 tempData->i2f4[eval->subCels[j].cbEntry]);
705 qcell = enc->cb4x4 + eval->subCels[j].cbEntry;
707 ff_apply_vector_2x2(enc, subX , subY ,
708 enc->cb2x2 + qcell->idx[0]);
709 ff_apply_vector_2x2(enc, subX+2, subY ,
710 enc->cb2x2 + qcell->idx[1]);
711 ff_apply_vector_2x2(enc, subX , subY+2,
712 enc->cb2x2 + qcell->idx[2]);
713 ff_apply_vector_2x2(enc, subX+2, subY+2,
714 enc->cb2x2 + qcell->idx[3]);
718 for (k=0; k<4; k++) {
719 int cb_idx = eval->subCels[j].subCels[k];
720 bytestream_put_byte(&spool.args,
721 tempData->i2f2[cb_idx]);
723 ff_apply_vector_2x2(enc, subX + 2*(k&1), subY + (k&2),
724 enc->cb2x2 + cb_idx);
728 write_typecode(&spool, eval->subCels[j].best_coding);
734 /* Flush the remainder of the argument/type spool */
735 while (spool.typeSpoolLength)
736 write_typecode(&spool, 0x0);
739 uint8_t *fdata[3] = {enc->frame_to_enc->data[0],
740 enc->frame_to_enc->data[1],
741 enc->frame_to_enc->data[2]};
742 uint8_t *cdata[3] = {enc->current_frame->data[0],
743 enc->current_frame->data[1],
744 enc->current_frame->data[2]};
745 av_log(enc->avctx, AV_LOG_ERROR, "Expected distortion: %i Actual: %i\n",
747 block_sse(fdata, cdata, 0, 0, 0, 0,
748 enc->frame_to_enc->linesize,
749 enc->current_frame->linesize,
750 enc->width)); //WARNING: Square dimensions implied...
756 * Create a single YUV cell from a 2x2 section of the image
758 static inline void frame_block_to_cell(uint8_t *block, uint8_t * const *data,
759 int top, int left, const int *stride)
764 for (j=0; j<2; j++) {
765 int x = (top+i)*stride[0] + left + j;
766 *block++ = data[0][x];
767 x = (top+i)*stride[1] + left + j;
777 * Create YUV clusters for the entire image
779 static void create_clusters(const AVFrame *frame, int w, int h, uint8_t *yuvClusters)
784 for (j=0; j<w; j+=4) {
785 for (k=0; k < 2; k++)
786 for (l=0; l < 2; l++)
787 frame_block_to_cell(yuvClusters + (l + 2*k)*6, frame->data,
788 i+2*k, j+2*l, frame->linesize);
793 static void generate_codebook(RoqContext *enc, RoqTempdata *tempdata,
794 int *points, int inputCount, roq_cell *results,
795 int size, int cbsize)
798 int c_size = size*size/4;
800 int *codebook = av_malloc(6*c_size*cbsize*sizeof(int));
804 closest_cb = av_malloc(6*c_size*inputCount*sizeof(int));
806 closest_cb = tempdata->closest_cb2;
808 ff_init_elbg(points, 6*c_size, inputCount, codebook, cbsize, 1, closest_cb, &enc->randctx);
809 ff_do_elbg(points, 6*c_size, inputCount, codebook, cbsize, 1, closest_cb, &enc->randctx);
815 for (i=0; i<cbsize; i++)
816 for (k=0; k<c_size; k++) {
818 results->y[j] = *buf++;
820 results->u = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS;
821 results->v = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS;
828 static void generate_new_codebooks(RoqContext *enc, RoqTempdata *tempData)
831 RoqCodebooks *codebooks = &tempData->codebooks;
832 int max = enc->width*enc->height/16;
834 roq_cell *results4 = av_malloc(sizeof(roq_cell)*MAX_CBS_4x4*4);
835 uint8_t *yuvClusters=av_malloc(sizeof(int)*max*6*4);
836 int *points = av_malloc(max*6*4*sizeof(int));
839 /* Subsample YUV data */
840 create_clusters(enc->frame_to_enc, enc->width, enc->height, yuvClusters);
842 /* Cast to integer and apply chroma bias */
843 for (i=0; i<max*24; i++) {
844 bias = ((i%6)<4) ? 1 : CHROMA_BIAS;
845 points[i] = bias*yuvClusters[i];
848 /* Create 4x4 codebooks */
849 generate_codebook(enc, tempData, points, max, results4, 4, MAX_CBS_4x4);
851 codebooks->numCB4 = MAX_CBS_4x4;
853 tempData->closest_cb2 = av_malloc(max*4*sizeof(int));
855 /* Create 2x2 codebooks */
856 generate_codebook(enc, tempData, points, max*4, enc->cb2x2, 2, MAX_CBS_2x2);
858 codebooks->numCB2 = MAX_CBS_2x2;
860 /* Unpack 2x2 codebook clusters */
861 for (i=0; i<codebooks->numCB2; i++)
862 unpack_roq_cell(enc->cb2x2 + i, codebooks->unpacked_cb2 + i*2*2*3);
864 /* Index all 4x4 entries to the 2x2 entries, unpack, and enlarge */
865 for (i=0; i<codebooks->numCB4; i++) {
866 for (j=0; j<4; j++) {
867 unpack_roq_cell(&results4[4*i + j], mb2);
868 index_mb(mb2, codebooks->unpacked_cb2, codebooks->numCB2,
869 &enc->cb4x4[i].idx[j], 2);
871 unpack_roq_qcell(codebooks->unpacked_cb2, enc->cb4x4 + i,
872 codebooks->unpacked_cb4 + i*4*4*3);
873 enlarge_roq_mb4(codebooks->unpacked_cb4 + i*4*4*3,
874 codebooks->unpacked_cb4_enlarged + i*8*8*3);
877 av_free(yuvClusters);
882 static void roq_encode_video(RoqContext *enc)
884 RoqTempdata *tempData = enc->tmpData;
887 memset(tempData, 0, sizeof(*tempData));
889 create_cel_evals(enc, tempData);
891 generate_new_codebooks(enc, tempData);
893 if (enc->framesSinceKeyframe >= 1) {
894 motion_search(enc, 8);
895 motion_search(enc, 4);
899 for (i=0; i<enc->width*enc->height/64; i++)
900 gather_data_for_cel(tempData->cel_evals + i, enc, tempData);
902 /* Quake 3 can't handle chunks bigger than 65535 bytes */
903 if (tempData->mainChunkSize/8 > 65535) {
904 av_log(enc->avctx, AV_LOG_ERROR,
905 "Warning, generated a frame too big (%d > 65535), "
906 "try using a smaller qscale value.\n",
907 tempData->mainChunkSize/8);
909 tempData->mainChunkSize = 0;
910 memset(tempData->used_option, 0, sizeof(tempData->used_option));
911 memset(tempData->codebooks.usedCB4, 0,
912 sizeof(tempData->codebooks.usedCB4));
913 memset(tempData->codebooks.usedCB2, 0,
914 sizeof(tempData->codebooks.usedCB2));
919 remap_codebooks(enc, tempData);
921 write_codebooks(enc, tempData);
923 reconstruct_and_encode_image(enc, tempData, enc->width, enc->height,
924 enc->width*enc->height/64);
926 enc->avctx->coded_frame = enc->current_frame;
928 /* Rotate frame history */
929 FFSWAP(AVFrame *, enc->current_frame, enc->last_frame);
930 FFSWAP(motion_vect *, enc->last_motion4, enc->this_motion4);
931 FFSWAP(motion_vect *, enc->last_motion8, enc->this_motion8);
933 av_free(tempData->cel_evals);
934 av_free(tempData->closest_cb2);
936 enc->framesSinceKeyframe++;
939 static int roq_encode_init(AVCodecContext *avctx)
941 RoqContext *enc = avctx->priv_data;
943 av_lfg_init(&enc->randctx, 1);
945 enc->framesSinceKeyframe = 0;
946 if ((avctx->width & 0xf) || (avctx->height & 0xf)) {
947 av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n");
951 if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1)))
952 av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two\n");
954 enc->width = avctx->width;
955 enc->height = avctx->height;
957 enc->framesSinceKeyframe = 0;
958 enc->first_frame = 1;
960 enc->last_frame = &enc->frames[0];
961 enc->current_frame = &enc->frames[1];
963 enc->tmpData = av_malloc(sizeof(RoqTempdata));
966 av_mallocz((enc->width*enc->height/16)*sizeof(motion_vect));
969 av_malloc ((enc->width*enc->height/16)*sizeof(motion_vect));
972 av_mallocz((enc->width*enc->height/64)*sizeof(motion_vect));
975 av_malloc ((enc->width*enc->height/64)*sizeof(motion_vect));
980 static void roq_write_video_info_chunk(RoqContext *enc)
983 bytestream_put_le16(&enc->out_buf, RoQ_INFO);
986 bytestream_put_le32(&enc->out_buf, 8);
988 /* Unused argument */
989 bytestream_put_byte(&enc->out_buf, 0x00);
990 bytestream_put_byte(&enc->out_buf, 0x00);
993 bytestream_put_le16(&enc->out_buf, enc->width);
996 bytestream_put_le16(&enc->out_buf, enc->height);
998 /* Unused in Quake 3, mimics the output of the real encoder */
999 bytestream_put_byte(&enc->out_buf, 0x08);
1000 bytestream_put_byte(&enc->out_buf, 0x00);
1001 bytestream_put_byte(&enc->out_buf, 0x04);
1002 bytestream_put_byte(&enc->out_buf, 0x00);
1005 static int roq_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
1006 const AVFrame *frame, int *got_packet)
1008 RoqContext *enc = avctx->priv_data;
1013 enc->frame_to_enc = frame;
1016 enc->lambda = frame->quality - 1;
1018 enc->lambda = 2*ROQ_LAMBDA_SCALE;
1020 /* 138 bits max per 8x8 block +
1021 * 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header */
1022 size = ((enc->width * enc->height / 64) * 138 + 7) / 8 + 256 * (6 + 4) + 8;
1023 if ((ret = ff_alloc_packet(pkt, size)) < 0) {
1024 av_log(avctx, AV_LOG_ERROR, "Error getting output packet with size %d.\n", size);
1027 enc->out_buf = pkt->data;
1029 /* Check for I frame */
1030 if (enc->framesSinceKeyframe == avctx->gop_size)
1031 enc->framesSinceKeyframe = 0;
1033 if (enc->first_frame) {
1034 /* Alloc memory for the reconstruction data (we must know the stride
1036 if (avctx->get_buffer(avctx, enc->current_frame) ||
1037 avctx->get_buffer(avctx, enc->last_frame)) {
1038 av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
1042 /* Before the first video frame, write a "video info" chunk */
1043 roq_write_video_info_chunk(enc);
1045 enc->first_frame = 0;
1048 /* Encode the actual frame */
1049 roq_encode_video(enc);
1051 pkt->size = enc->out_buf - pkt->data;
1052 if (enc->framesSinceKeyframe == 1)
1053 pkt->flags |= AV_PKT_FLAG_KEY;
1059 static int roq_encode_end(AVCodecContext *avctx)
1061 RoqContext *enc = avctx->priv_data;
1063 avctx->release_buffer(avctx, enc->last_frame);
1064 avctx->release_buffer(avctx, enc->current_frame);
1066 av_free(enc->tmpData);
1067 av_free(enc->this_motion4);
1068 av_free(enc->last_motion4);
1069 av_free(enc->this_motion8);
1070 av_free(enc->last_motion8);
1075 AVCodec ff_roq_encoder = {
1077 .type = AVMEDIA_TYPE_VIDEO,
1079 .priv_data_size = sizeof(RoqContext),
1080 .init = roq_encode_init,
1081 .encode2 = roq_encode_frame,
1082 .close = roq_encode_end,
1083 .supported_framerates = (const AVRational[]){ {30,1}, {0,0} },
1084 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV444P,
1086 .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),