3 * Copyright (c) 2007 Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * VC-3 encoder funded by the British Broadcasting Corporation
7 * This file is part of FFmpeg.
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #define RC_VARIANCE 1 // use variance or ssd for fast rc
29 #include "mpegvideo.h"
30 #include "dnxhddata.h"
42 int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
44 typedef struct DNXHDEncContext {
45 MpegEncContext m; ///< Used for quantization dsp functions
49 const CIDEntry *cid_table;
50 uint8_t *msip; ///< Macroblock Scan Indexes Payload
53 struct DNXHDEncContext *thread[MAX_THREADS];
55 unsigned dct_y_offset;
56 unsigned dct_uv_offset;
60 DECLARE_ALIGNED_16(DCTELEM, blocks[8][64]);
62 int (*qmatrix_c) [64];
63 int (*qmatrix_l) [64];
64 uint16_t (*qmatrix_l16)[2][64];
65 uint16_t (*qmatrix_c16)[2][64];
86 RCEntry (*mb_rc)[8160];
89 #define LAMBDA_FRAC_BITS 10
91 static int dnxhd_init_vlc(DNXHDEncContext *ctx)
94 int max_level = 1<<(ctx->cid_table->bit_depth+2);
96 CHECKED_ALLOCZ(ctx->vlc_codes, max_level*4*sizeof(*ctx->vlc_codes));
97 CHECKED_ALLOCZ(ctx->vlc_bits, max_level*4*sizeof(*ctx->vlc_bits));
98 CHECKED_ALLOCZ(ctx->run_codes, 63*2);
99 CHECKED_ALLOCZ(ctx->run_bits, 63);
101 ctx->vlc_codes += max_level*2;
102 ctx->vlc_bits += max_level*2;
103 for (level = -max_level; level < max_level; level++) {
104 for (run = 0; run < 2; run++) {
105 int index = (level<<1)|run;
106 int sign, offset = 0, alevel = level;
108 MASK_ABS(sign, alevel);
110 offset = (alevel-1)>>6;
113 for (j = 0; j < 257; j++) {
114 if (ctx->cid_table->ac_level[j] == alevel &&
115 (!offset || (ctx->cid_table->ac_index_flag[j] && offset)) &&
116 (!run || (ctx->cid_table->ac_run_flag [j] && run))) {
117 assert(!ctx->vlc_codes[index]);
119 ctx->vlc_codes[index] = (ctx->cid_table->ac_codes[j]<<1)|(sign&1);
120 ctx->vlc_bits [index] = ctx->cid_table->ac_bits[j]+1;
122 ctx->vlc_codes[index] = ctx->cid_table->ac_codes[j];
123 ctx->vlc_bits [index] = ctx->cid_table->ac_bits [j];
128 assert(!alevel || j < 257);
130 ctx->vlc_codes[index] = (ctx->vlc_codes[index]<<ctx->cid_table->index_bits)|offset;
131 ctx->vlc_bits [index]+= ctx->cid_table->index_bits;
135 for (i = 0; i < 62; i++) {
136 int run = ctx->cid_table->run[i];
138 ctx->run_codes[run] = ctx->cid_table->run_codes[i];
139 ctx->run_bits [run] = ctx->cid_table->run_bits[i];
146 static int dnxhd_init_qmat(DNXHDEncContext *ctx, int lbias, int cbias)
148 // init first elem to 1 to avoid div by 0 in convert_matrix
149 uint16_t weight_matrix[64] = {1,}; // convert_matrix needs uint16_t*
152 CHECKED_ALLOCZ(ctx->qmatrix_l, (ctx->m.avctx->qmax+1) * 64 * sizeof(int));
153 CHECKED_ALLOCZ(ctx->qmatrix_c, (ctx->m.avctx->qmax+1) * 64 * sizeof(int));
154 CHECKED_ALLOCZ(ctx->qmatrix_l16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));
155 CHECKED_ALLOCZ(ctx->qmatrix_c16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));
157 for (i = 1; i < 64; i++) {
158 int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
159 weight_matrix[j] = ctx->cid_table->luma_weight[i];
161 ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_l, ctx->qmatrix_l16, weight_matrix,
162 ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
163 for (i = 1; i < 64; i++) {
164 int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
165 weight_matrix[j] = ctx->cid_table->chroma_weight[i];
167 ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_c, ctx->qmatrix_c16, weight_matrix,
168 ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
169 for (qscale = 1; qscale <= ctx->m.avctx->qmax; qscale++) {
170 for (i = 0; i < 64; i++) {
171 ctx->qmatrix_l [qscale] [i] <<= 2; ctx->qmatrix_c [qscale] [i] <<= 2;
172 ctx->qmatrix_l16[qscale][0][i] <<= 2; ctx->qmatrix_l16[qscale][1][i] <<= 2;
173 ctx->qmatrix_c16[qscale][0][i] <<= 2; ctx->qmatrix_c16[qscale][1][i] <<= 2;
181 static int dnxhd_init_rc(DNXHDEncContext *ctx)
183 CHECKED_ALLOCZ(ctx->mb_rc, 8160*ctx->m.avctx->qmax*sizeof(RCEntry));
184 if (ctx->m.avctx->mb_decision != FF_MB_DECISION_RD)
185 CHECKED_ALLOCZ(ctx->mb_cmp, ctx->m.mb_num*sizeof(RCCMPEntry));
187 ctx->frame_bits = (ctx->cid_table->coding_unit_size - 640 - 4) * 8;
189 ctx->lambda = 2<<LAMBDA_FRAC_BITS; // qscale 2
195 static int dnxhd_encode_init(AVCodecContext *avctx)
197 DNXHDEncContext *ctx = avctx->priv_data;
200 ctx->cid = ff_dnxhd_find_cid(avctx);
201 if (!ctx->cid || avctx->pix_fmt != PIX_FMT_YUV422P) {
202 av_log(avctx, AV_LOG_ERROR, "video parameters incompatible with DNxHD\n");
205 av_log(avctx, AV_LOG_DEBUG, "cid %d\n", ctx->cid);
207 index = ff_dnxhd_get_cid_table(ctx->cid);
208 ctx->cid_table = &ff_dnxhd_cid_table[index];
210 ctx->m.avctx = avctx;
214 dsputil_init(&ctx->m.dsp, avctx);
215 ff_dct_common_init(&ctx->m);
216 if (!ctx->m.dct_quantize)
217 ctx->m.dct_quantize = dct_quantize_c;
219 ctx->m.mb_height = (avctx->height + 15) / 16;
220 ctx->m.mb_width = (avctx->width + 15) / 16;
222 if (avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
224 ctx->m.mb_height /= 2;
227 ctx->m.mb_num = ctx->m.mb_height * ctx->m.mb_width;
229 if (avctx->intra_quant_bias != FF_DEFAULT_QUANT_BIAS)
230 ctx->m.intra_quant_bias = avctx->intra_quant_bias;
231 if (dnxhd_init_qmat(ctx, ctx->m.intra_quant_bias, 0) < 0) // XXX tune lbias/cbias
234 if (dnxhd_init_vlc(ctx) < 0)
236 if (dnxhd_init_rc(ctx) < 0)
239 CHECKED_ALLOCZ(ctx->slice_size, ctx->m.mb_height*sizeof(uint32_t));
240 CHECKED_ALLOCZ(ctx->mb_bits, ctx->m.mb_num *sizeof(uint16_t));
241 CHECKED_ALLOCZ(ctx->mb_qscale, ctx->m.mb_num *sizeof(uint8_t));
243 ctx->frame.key_frame = 1;
244 ctx->frame.pict_type = FF_I_TYPE;
245 ctx->m.avctx->coded_frame = &ctx->frame;
247 if (avctx->thread_count > MAX_THREADS || (avctx->thread_count > ctx->m.mb_height)) {
248 av_log(avctx, AV_LOG_ERROR, "too many threads\n");
252 ctx->thread[0] = ctx;
253 for (i = 1; i < avctx->thread_count; i++) {
254 ctx->thread[i] = av_malloc(sizeof(DNXHDEncContext));
255 memcpy(ctx->thread[i], ctx, sizeof(DNXHDEncContext));
258 for (i = 0; i < avctx->thread_count; i++) {
259 ctx->thread[i]->m.start_mb_y = (ctx->m.mb_height*(i ) + avctx->thread_count/2) / avctx->thread_count;
260 ctx->thread[i]->m.end_mb_y = (ctx->m.mb_height*(i+1) + avctx->thread_count/2) / avctx->thread_count;
264 fail: //for CHECKED_ALLOCZ
268 static int dnxhd_write_header(AVCodecContext *avctx, uint8_t *buf)
270 DNXHDEncContext *ctx = avctx->priv_data;
271 const uint8_t header_prefix[5] = { 0x00,0x00,0x02,0x80,0x01 };
273 memcpy(buf, header_prefix, 5);
274 buf[5] = ctx->interlaced ? ctx->cur_field+2 : 0x01;
275 buf[6] = 0x80; // crc flag off
276 buf[7] = 0xa0; // reserved
277 AV_WB16(buf + 0x18, avctx->height); // ALPF
278 AV_WB16(buf + 0x1a, avctx->width); // SPL
279 AV_WB16(buf + 0x1d, avctx->height); // NAL
281 buf[0x21] = 0x38; // FIXME 8 bit per comp
282 buf[0x22] = 0x88 + (ctx->frame.interlaced_frame<<2);
283 AV_WB32(buf + 0x28, ctx->cid); // CID
284 buf[0x2c] = ctx->interlaced ? 0 : 0x80;
286 buf[0x5f] = 0x01; // UDL
288 buf[0x167] = 0x02; // reserved
289 AV_WB16(buf + 0x16a, ctx->m.mb_height * 4 + 4); // MSIPS
290 buf[0x16d] = ctx->m.mb_height; // Ns
291 buf[0x16f] = 0x10; // reserved
293 ctx->msip = buf + 0x170;
297 static av_always_inline void dnxhd_encode_dc(DNXHDEncContext *ctx, int diff)
301 nbits = av_log2_16bit(-2*diff);
304 nbits = av_log2_16bit(2*diff);
306 put_bits(&ctx->m.pb, ctx->cid_table->dc_bits[nbits] + nbits,
307 (ctx->cid_table->dc_codes[nbits]<<nbits) + (diff & ((1 << nbits) - 1)));
310 static av_always_inline void dnxhd_encode_block(DNXHDEncContext *ctx, DCTELEM *block, int last_index, int n)
312 int last_non_zero = 0;
315 dnxhd_encode_dc(ctx, block[0] - ctx->m.last_dc[n]);
316 ctx->m.last_dc[n] = block[0];
318 for (i = 1; i <= last_index; i++) {
319 j = ctx->m.intra_scantable.permutated[i];
322 int run_level = i - last_non_zero - 1;
323 int rlevel = (slevel<<1)|!!run_level;
324 put_bits(&ctx->m.pb, ctx->vlc_bits[rlevel], ctx->vlc_codes[rlevel]);
326 put_bits(&ctx->m.pb, ctx->run_bits[run_level], ctx->run_codes[run_level]);
330 put_bits(&ctx->m.pb, ctx->vlc_bits[0], ctx->vlc_codes[0]); // EOB
333 static av_always_inline void dnxhd_unquantize_c(DNXHDEncContext *ctx, DCTELEM *block, int n, int qscale, int last_index)
335 const uint8_t *weight_matrix;
339 weight_matrix = (n&2) ? ctx->cid_table->chroma_weight : ctx->cid_table->luma_weight;
341 for (i = 1; i <= last_index; i++) {
342 int j = ctx->m.intra_scantable.permutated[i];
346 level = (1-2*level) * qscale * weight_matrix[i];
347 if (weight_matrix[i] != 32)
352 level = (2*level+1) * qscale * weight_matrix[i];
353 if (weight_matrix[i] != 32)
362 static av_always_inline int dnxhd_ssd_block(DCTELEM *qblock, DCTELEM *block)
366 for (i = 0; i < 64; i++)
367 score += (block[i]-qblock[i])*(block[i]-qblock[i]);
371 static av_always_inline int dnxhd_calc_ac_bits(DNXHDEncContext *ctx, DCTELEM *block, int last_index)
373 int last_non_zero = 0;
376 for (i = 1; i <= last_index; i++) {
377 j = ctx->m.intra_scantable.permutated[i];
380 int run_level = i - last_non_zero - 1;
381 bits += ctx->vlc_bits[(level<<1)|!!run_level]+ctx->run_bits[run_level];
388 static av_always_inline void dnxhd_get_pixels_4x8(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
391 for (i = 0; i < 4; i++) {
392 block[0] = pixels[0];
393 block[1] = pixels[1];
394 block[2] = pixels[2];
395 block[3] = pixels[3];
396 block[4] = pixels[4];
397 block[5] = pixels[5];
398 block[6] = pixels[6];
399 block[7] = pixels[7];
403 memcpy(block , block- 8, sizeof(*block)*8);
404 memcpy(block+ 8, block-16, sizeof(*block)*8);
405 memcpy(block+16, block-24, sizeof(*block)*8);
406 memcpy(block+24, block-32, sizeof(*block)*8);
409 static av_always_inline void dnxhd_get_blocks(DNXHDEncContext *ctx, int mb_x, int mb_y)
411 const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize) + (mb_x << 4);
412 const uint8_t *ptr_u = ctx->thread[0]->src[1] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
413 const uint8_t *ptr_v = ctx->thread[0]->src[2] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
414 DSPContext *dsp = &ctx->m.dsp;
416 dsp->get_pixels(ctx->blocks[0], ptr_y , ctx->m.linesize);
417 dsp->get_pixels(ctx->blocks[1], ptr_y + 8, ctx->m.linesize);
418 dsp->get_pixels(ctx->blocks[2], ptr_u , ctx->m.uvlinesize);
419 dsp->get_pixels(ctx->blocks[3], ptr_v , ctx->m.uvlinesize);
421 if (mb_y+1 == ctx->m.mb_height && ctx->m.avctx->height == 1080) {
422 if (ctx->interlaced) {
423 dnxhd_get_pixels_4x8(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
424 dnxhd_get_pixels_4x8(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
425 dnxhd_get_pixels_4x8(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
426 dnxhd_get_pixels_4x8(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
428 dsp->clear_block(ctx->blocks[4]); dsp->clear_block(ctx->blocks[5]);
429 dsp->clear_block(ctx->blocks[6]); dsp->clear_block(ctx->blocks[7]);
432 dsp->get_pixels(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
433 dsp->get_pixels(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
434 dsp->get_pixels(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
435 dsp->get_pixels(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
439 static av_always_inline int dnxhd_switch_matrix(DNXHDEncContext *ctx, int i)
442 ctx->m.q_intra_matrix16 = ctx->qmatrix_c16;
443 ctx->m.q_intra_matrix = ctx->qmatrix_c;
446 ctx->m.q_intra_matrix16 = ctx->qmatrix_l16;
447 ctx->m.q_intra_matrix = ctx->qmatrix_l;
452 static int dnxhd_calc_bits_thread(AVCodecContext *avctx, void *arg)
454 DNXHDEncContext *ctx = *(void**)arg;
456 int qscale = ctx->thread[0]->qscale;
458 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
461 ctx->m.last_dc[2] = 1024;
463 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
464 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
470 dnxhd_get_blocks(ctx, mb_x, mb_y);
472 for (i = 0; i < 8; i++) {
473 DECLARE_ALIGNED_16(DCTELEM, block[64]);
474 DCTELEM *src_block = ctx->blocks[i];
475 int overflow, nbits, diff, last_index;
476 int n = dnxhd_switch_matrix(ctx, i);
478 memcpy(block, src_block, sizeof(block));
479 last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);
480 ac_bits += dnxhd_calc_ac_bits(ctx, block, last_index);
482 diff = block[0] - ctx->m.last_dc[n];
483 if (diff < 0) nbits = av_log2_16bit(-2*diff);
484 else nbits = av_log2_16bit( 2*diff);
485 dc_bits += ctx->cid_table->dc_bits[nbits] + nbits;
487 ctx->m.last_dc[n] = block[0];
489 if (avctx->mb_decision == FF_MB_DECISION_RD || !RC_VARIANCE) {
490 dnxhd_unquantize_c(ctx, block, i, qscale, last_index);
491 ctx->m.dsp.idct(block);
492 ssd += dnxhd_ssd_block(block, src_block);
495 ctx->mb_rc[qscale][mb].ssd = ssd;
496 ctx->mb_rc[qscale][mb].bits = ac_bits+dc_bits+12+8*ctx->vlc_bits[0];
502 static int dnxhd_encode_thread(AVCodecContext *avctx, void *arg)
504 DNXHDEncContext *ctx = *(void**)arg;
507 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
510 ctx->m.last_dc[2] = 1024;
511 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
512 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
513 int qscale = ctx->mb_qscale[mb];
516 put_bits(&ctx->m.pb, 12, qscale<<1);
518 dnxhd_get_blocks(ctx, mb_x, mb_y);
520 for (i = 0; i < 8; i++) {
521 DCTELEM *block = ctx->blocks[i];
522 int last_index, overflow;
523 int n = dnxhd_switch_matrix(ctx, i);
524 last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);
526 dnxhd_encode_block(ctx, block, last_index, n);
527 //STOP_TIMER("encode_block");
530 if (put_bits_count(&ctx->m.pb)&31)
531 put_bits(&ctx->m.pb, 32-(put_bits_count(&ctx->m.pb)&31), 0);
533 flush_put_bits(&ctx->m.pb);
537 static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx, uint8_t *buf)
541 for (i = 0; i < ctx->m.avctx->thread_count; i++) {
543 for (mb_y = ctx->thread[i]->m.start_mb_y; mb_y < ctx->thread[i]->m.end_mb_y; mb_y++) {
544 ctx->slice_size[mb_y] = 0;
545 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
546 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
547 ctx->slice_size[mb_y] += ctx->mb_bits[mb];
549 ctx->slice_size[mb_y] = (ctx->slice_size[mb_y]+31)&~31;
550 ctx->slice_size[mb_y] >>= 3;
551 thread_size += ctx->slice_size[mb_y];
553 init_put_bits(&ctx->thread[i]->m.pb, buf + 640 + offset, thread_size);
554 offset += thread_size;
558 static int dnxhd_mb_var_thread(AVCodecContext *avctx, void *arg)
560 DNXHDEncContext *ctx = *(void**)arg;
562 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
563 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
564 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
565 uint8_t *pix = ctx->thread[0]->src[0] + ((mb_y<<4) * ctx->m.linesize) + (mb_x<<4);
566 int sum = ctx->m.dsp.pix_sum(pix, ctx->m.linesize);
567 int varc = (ctx->m.dsp.pix_norm1(pix, ctx->m.linesize) - (((unsigned)(sum*sum))>>8)+128)>>8;
568 ctx->mb_cmp[mb].value = varc;
569 ctx->mb_cmp[mb].mb = mb;
575 static int dnxhd_encode_rdo(AVCodecContext *avctx, DNXHDEncContext *ctx)
577 int lambda, up_step, down_step;
578 int last_lower = INT_MAX, last_higher = 0;
581 for (q = 1; q < avctx->qmax; q++) {
583 avctx->execute(avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count, sizeof(void*));
585 up_step = down_step = 2<<LAMBDA_FRAC_BITS;
586 lambda = ctx->lambda;
591 if (lambda == last_higher) {
593 end = 1; // need to set final qscales/bits
595 for (y = 0; y < ctx->m.mb_height; y++) {
596 for (x = 0; x < ctx->m.mb_width; x++) {
597 unsigned min = UINT_MAX;
599 int mb = y*ctx->m.mb_width+x;
600 for (q = 1; q < avctx->qmax; q++) {
601 unsigned score = ctx->mb_rc[q][mb].bits*lambda+(ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);
607 bits += ctx->mb_rc[qscale][mb].bits;
608 ctx->mb_qscale[mb] = qscale;
609 ctx->mb_bits[mb] = ctx->mb_rc[qscale][mb].bits;
611 bits = (bits+31)&~31; // padding
612 if (bits > ctx->frame_bits)
615 //dprintf(ctx->m.avctx, "lambda %d, up %u, down %u, bits %d, frame %d\n",
616 // lambda, last_higher, last_lower, bits, ctx->frame_bits);
618 if (bits > ctx->frame_bits)
622 if (bits < ctx->frame_bits) {
623 last_lower = FFMIN(lambda, last_lower);
624 if (last_higher != 0)
625 lambda = (lambda+last_higher)>>1;
628 down_step *= 5; // XXX tune ?
629 up_step = 1<<LAMBDA_FRAC_BITS;
630 lambda = FFMAX(1, lambda);
631 if (lambda == last_lower)
634 last_higher = FFMAX(lambda, last_higher);
635 if (last_lower != INT_MAX)
636 lambda = (lambda+last_lower)>>1;
640 down_step = 1<<LAMBDA_FRAC_BITS;
643 //dprintf(ctx->m.avctx, "out lambda %d\n", lambda);
644 ctx->lambda = lambda;
648 static int dnxhd_find_qscale(DNXHDEncContext *ctx)
654 int last_lower = INT_MAX;
658 qscale = ctx->qscale;
661 ctx->qscale = qscale;
662 // XXX avoid recalculating bits
663 ctx->m.avctx->execute(ctx->m.avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, ctx->m.avctx->thread_count, sizeof(void*));
664 for (y = 0; y < ctx->m.mb_height; y++) {
665 for (x = 0; x < ctx->m.mb_width; x++)
666 bits += ctx->mb_rc[qscale][y*ctx->m.mb_width+x].bits;
667 bits = (bits+31)&~31; // padding
668 if (bits > ctx->frame_bits)
671 //dprintf(ctx->m.avctx, "%d, qscale %d, bits %d, frame %d, higher %d, lower %d\n",
672 // ctx->m.avctx->frame_number, qscale, bits, ctx->frame_bits, last_higher, last_lower);
673 if (bits < ctx->frame_bits) {
676 if (last_higher == qscale - 1) {
677 qscale = last_higher;
680 last_lower = FFMIN(qscale, last_lower);
681 if (last_higher != 0)
682 qscale = (qscale+last_higher)>>1;
684 qscale -= down_step++;
689 if (last_lower == qscale + 1)
691 last_higher = FFMAX(qscale, last_higher);
692 if (last_lower != INT_MAX)
693 qscale = (qscale+last_lower)>>1;
697 if (qscale >= ctx->m.avctx->qmax)
701 //dprintf(ctx->m.avctx, "out qscale %d\n", qscale);
702 ctx->qscale = qscale;
706 static int dnxhd_rc_cmp(const void *a, const void *b)
708 return ((const RCCMPEntry *)b)->value - ((const RCCMPEntry *)a)->value;
711 static int dnxhd_encode_fast(AVCodecContext *avctx, DNXHDEncContext *ctx)
715 if ((ret = dnxhd_find_qscale(ctx)) < 0)
717 for (y = 0; y < ctx->m.mb_height; y++) {
718 for (x = 0; x < ctx->m.mb_width; x++) {
719 int mb = y*ctx->m.mb_width+x;
721 ctx->mb_qscale[mb] = ctx->qscale;
722 ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale][mb].bits;
723 max_bits += ctx->mb_rc[ctx->qscale][mb].bits;
725 delta_bits = ctx->mb_rc[ctx->qscale][mb].bits-ctx->mb_rc[ctx->qscale+1][mb].bits;
726 ctx->mb_cmp[mb].mb = mb;
727 ctx->mb_cmp[mb].value = delta_bits ?
728 ((ctx->mb_rc[ctx->qscale][mb].ssd-ctx->mb_rc[ctx->qscale+1][mb].ssd)*100)/delta_bits
729 : INT_MIN; //avoid increasing qscale
732 max_bits += 31; //worst padding
736 avctx->execute(avctx, dnxhd_mb_var_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count, sizeof(void*));
737 qsort(ctx->mb_cmp, ctx->m.mb_num, sizeof(RCEntry), dnxhd_rc_cmp);
738 for (x = 0; x < ctx->m.mb_num && max_bits > ctx->frame_bits; x++) {
739 int mb = ctx->mb_cmp[x].mb;
740 max_bits -= ctx->mb_rc[ctx->qscale][mb].bits - ctx->mb_rc[ctx->qscale+1][mb].bits;
741 ctx->mb_qscale[mb] = ctx->qscale+1;
742 ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale+1][mb].bits;
748 static void dnxhd_load_picture(DNXHDEncContext *ctx, const AVFrame *frame)
752 for (i = 0; i < 3; i++) {
753 ctx->frame.data[i] = frame->data[i];
754 ctx->frame.linesize[i] = frame->linesize[i];
757 for (i = 0; i < ctx->m.avctx->thread_count; i++) {
758 ctx->thread[i]->m.linesize = ctx->frame.linesize[0]<<ctx->interlaced;
759 ctx->thread[i]->m.uvlinesize = ctx->frame.linesize[1]<<ctx->interlaced;
760 ctx->thread[i]->dct_y_offset = ctx->m.linesize *8;
761 ctx->thread[i]->dct_uv_offset = ctx->m.uvlinesize*8;
764 ctx->frame.interlaced_frame = frame->interlaced_frame;
765 ctx->cur_field = frame->interlaced_frame && !frame->top_field_first;
768 static int dnxhd_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, const void *data)
770 DNXHDEncContext *ctx = avctx->priv_data;
774 if (buf_size < ctx->cid_table->frame_size) {
775 av_log(avctx, AV_LOG_ERROR, "output buffer is too small to compress picture\n");
779 dnxhd_load_picture(ctx, data);
782 for (i = 0; i < 3; i++) {
783 ctx->src[i] = ctx->frame.data[i];
784 if (ctx->interlaced && ctx->cur_field)
785 ctx->src[i] += ctx->frame.linesize[i];
788 dnxhd_write_header(avctx, buf);
790 if (avctx->mb_decision == FF_MB_DECISION_RD)
791 ret = dnxhd_encode_rdo(avctx, ctx);
793 ret = dnxhd_encode_fast(avctx, ctx);
795 av_log(avctx, AV_LOG_ERROR, "picture could not fit ratecontrol constraints\n");
799 dnxhd_setup_threads_slices(ctx, buf);
802 for (i = 0; i < ctx->m.mb_height; i++) {
803 AV_WB32(ctx->msip + i * 4, offset);
804 offset += ctx->slice_size[i];
805 assert(!(ctx->slice_size[i] & 3));
808 avctx->execute(avctx, dnxhd_encode_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count, sizeof(void*));
810 AV_WB32(buf + ctx->cid_table->coding_unit_size - 4, 0x600DC0DE); // EOF
812 if (ctx->interlaced && first_field) {
815 buf += ctx->cid_table->coding_unit_size;
816 buf_size -= ctx->cid_table->coding_unit_size;
817 goto encode_coding_unit;
820 ctx->frame.quality = ctx->qscale*FF_QP2LAMBDA;
822 return ctx->cid_table->frame_size;
825 static int dnxhd_encode_end(AVCodecContext *avctx)
827 DNXHDEncContext *ctx = avctx->priv_data;
828 int max_level = 1<<(ctx->cid_table->bit_depth+2);
831 av_free(ctx->vlc_codes-max_level*2);
832 av_free(ctx->vlc_bits -max_level*2);
833 av_freep(&ctx->run_codes);
834 av_freep(&ctx->run_bits);
836 av_freep(&ctx->mb_bits);
837 av_freep(&ctx->mb_qscale);
838 av_freep(&ctx->mb_rc);
839 av_freep(&ctx->mb_cmp);
840 av_freep(&ctx->slice_size);
842 av_freep(&ctx->qmatrix_c);
843 av_freep(&ctx->qmatrix_l);
844 av_freep(&ctx->qmatrix_c16);
845 av_freep(&ctx->qmatrix_l16);
847 for (i = 1; i < avctx->thread_count; i++)
848 av_freep(&ctx->thread[i]);
853 AVCodec dnxhd_encoder = {
857 sizeof(DNXHDEncContext),
859 dnxhd_encode_picture,
861 .pix_fmts = (enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_NONE},
862 .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),