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
27 #include "libavutil/opt.h"
30 #include "mpegvideo.h"
33 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
35 static const AVOption options[]={
36 {"nitris_compat", "encode with Avid Nitris compatibility", offsetof(DNXHDEncContext, nitris_compat), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 1, VE},
39 static const AVClass class = { "dnxhd", av_default_item_name, options, LIBAVUTIL_VERSION_INT };
41 int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
43 #define LAMBDA_FRAC_BITS 10
45 static av_always_inline void dnxhd_get_pixels_8x4(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
48 for (i = 0; i < 4; i++) {
49 block[0] = pixels[0]; block[1] = pixels[1];
50 block[2] = pixels[2]; block[3] = pixels[3];
51 block[4] = pixels[4]; block[5] = pixels[5];
52 block[6] = pixels[6]; block[7] = pixels[7];
56 memcpy(block , block- 8, sizeof(*block)*8);
57 memcpy(block+ 8, block-16, sizeof(*block)*8);
58 memcpy(block+16, block-24, sizeof(*block)*8);
59 memcpy(block+24, block-32, sizeof(*block)*8);
62 static int dnxhd_init_vlc(DNXHDEncContext *ctx)
65 int max_level = 1<<(ctx->cid_table->bit_depth+2);
67 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->vlc_codes, max_level*4*sizeof(*ctx->vlc_codes), fail);
68 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->vlc_bits , max_level*4*sizeof(*ctx->vlc_bits ), fail);
69 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->run_codes, 63*2 , fail);
70 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->run_bits , 63 , fail);
72 ctx->vlc_codes += max_level*2;
73 ctx->vlc_bits += max_level*2;
74 for (level = -max_level; level < max_level; level++) {
75 for (run = 0; run < 2; run++) {
76 int index = (level<<1)|run;
77 int sign, offset = 0, alevel = level;
79 MASK_ABS(sign, alevel);
81 offset = (alevel-1)>>6;
84 for (j = 0; j < 257; j++) {
85 if (ctx->cid_table->ac_level[j] == alevel &&
86 (!offset || (ctx->cid_table->ac_index_flag[j] && offset)) &&
87 (!run || (ctx->cid_table->ac_run_flag [j] && run))) {
88 assert(!ctx->vlc_codes[index]);
90 ctx->vlc_codes[index] = (ctx->cid_table->ac_codes[j]<<1)|(sign&1);
91 ctx->vlc_bits [index] = ctx->cid_table->ac_bits[j]+1;
93 ctx->vlc_codes[index] = ctx->cid_table->ac_codes[j];
94 ctx->vlc_bits [index] = ctx->cid_table->ac_bits [j];
99 assert(!alevel || j < 257);
101 ctx->vlc_codes[index] = (ctx->vlc_codes[index]<<ctx->cid_table->index_bits)|offset;
102 ctx->vlc_bits [index]+= ctx->cid_table->index_bits;
106 for (i = 0; i < 62; i++) {
107 int run = ctx->cid_table->run[i];
109 ctx->run_codes[run] = ctx->cid_table->run_codes[i];
110 ctx->run_bits [run] = ctx->cid_table->run_bits[i];
117 static int dnxhd_init_qmat(DNXHDEncContext *ctx, int lbias, int cbias)
119 // init first elem to 1 to avoid div by 0 in convert_matrix
120 uint16_t weight_matrix[64] = {1,}; // convert_matrix needs uint16_t*
123 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->qmatrix_l, (ctx->m.avctx->qmax+1) * 64 * sizeof(int) , fail);
124 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->qmatrix_c, (ctx->m.avctx->qmax+1) * 64 * sizeof(int) , fail);
125 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->qmatrix_l16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t), fail);
126 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->qmatrix_c16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t), fail);
128 for (i = 1; i < 64; i++) {
129 int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
130 weight_matrix[j] = ctx->cid_table->luma_weight[i];
132 ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_l, ctx->qmatrix_l16, weight_matrix,
133 ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
134 for (i = 1; i < 64; i++) {
135 int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
136 weight_matrix[j] = ctx->cid_table->chroma_weight[i];
138 ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_c, ctx->qmatrix_c16, weight_matrix,
139 ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
140 for (qscale = 1; qscale <= ctx->m.avctx->qmax; qscale++) {
141 for (i = 0; i < 64; i++) {
142 ctx->qmatrix_l [qscale] [i] <<= 2; ctx->qmatrix_c [qscale] [i] <<= 2;
143 ctx->qmatrix_l16[qscale][0][i] <<= 2; ctx->qmatrix_l16[qscale][1][i] <<= 2;
144 ctx->qmatrix_c16[qscale][0][i] <<= 2; ctx->qmatrix_c16[qscale][1][i] <<= 2;
152 static int dnxhd_init_rc(DNXHDEncContext *ctx)
154 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->mb_rc, 8160*ctx->m.avctx->qmax*sizeof(RCEntry), fail);
155 if (ctx->m.avctx->mb_decision != FF_MB_DECISION_RD)
156 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->mb_cmp, ctx->m.mb_num*sizeof(RCCMPEntry), fail);
158 ctx->frame_bits = (ctx->cid_table->coding_unit_size - 640 - 4 - ctx->min_padding) * 8;
160 ctx->lambda = 2<<LAMBDA_FRAC_BITS; // qscale 2
166 static int dnxhd_encode_init(AVCodecContext *avctx)
168 DNXHDEncContext *ctx = avctx->priv_data;
171 ctx->cid = ff_dnxhd_find_cid(avctx);
172 if (!ctx->cid || avctx->pix_fmt != PIX_FMT_YUV422P) {
173 av_log(avctx, AV_LOG_ERROR, "video parameters incompatible with DNxHD\n");
176 av_log(avctx, AV_LOG_DEBUG, "cid %d\n", ctx->cid);
178 index = ff_dnxhd_get_cid_table(ctx->cid);
179 ctx->cid_table = &ff_dnxhd_cid_table[index];
181 ctx->m.avctx = avctx;
185 ctx->get_pixels_8x4_sym = dnxhd_get_pixels_8x4;
187 dsputil_init(&ctx->m.dsp, avctx);
188 ff_dct_common_init(&ctx->m);
190 ff_dnxhd_init_mmx(ctx);
192 if (!ctx->m.dct_quantize)
193 ctx->m.dct_quantize = dct_quantize_c;
195 ctx->m.mb_height = (avctx->height + 15) / 16;
196 ctx->m.mb_width = (avctx->width + 15) / 16;
198 if (avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
200 ctx->m.mb_height /= 2;
203 ctx->m.mb_num = ctx->m.mb_height * ctx->m.mb_width;
205 if (avctx->intra_quant_bias != FF_DEFAULT_QUANT_BIAS)
206 ctx->m.intra_quant_bias = avctx->intra_quant_bias;
207 if (dnxhd_init_qmat(ctx, ctx->m.intra_quant_bias, 0) < 0) // XXX tune lbias/cbias
210 // Avid Nitris hardware decoder requires a minimum amount of padding in the coding unit payload
211 if (ctx->nitris_compat)
212 ctx->min_padding = 1600;
214 if (dnxhd_init_vlc(ctx) < 0)
216 if (dnxhd_init_rc(ctx) < 0)
219 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->slice_size, ctx->m.mb_height*sizeof(uint32_t), fail);
220 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->slice_offs, ctx->m.mb_height*sizeof(uint32_t), fail);
221 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->mb_bits, ctx->m.mb_num *sizeof(uint16_t), fail);
222 FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->mb_qscale, ctx->m.mb_num *sizeof(uint8_t) , fail);
224 ctx->frame.key_frame = 1;
225 ctx->frame.pict_type = AV_PICTURE_TYPE_I;
226 ctx->m.avctx->coded_frame = &ctx->frame;
228 if (avctx->thread_count > MAX_THREADS) {
229 av_log(avctx, AV_LOG_ERROR, "too many threads\n");
233 ctx->thread[0] = ctx;
234 for (i = 1; i < avctx->thread_count; i++) {
235 ctx->thread[i] = av_malloc(sizeof(DNXHDEncContext));
236 memcpy(ctx->thread[i], ctx, sizeof(DNXHDEncContext));
240 fail: //for FF_ALLOCZ_OR_GOTO
244 static int dnxhd_write_header(AVCodecContext *avctx, uint8_t *buf)
246 DNXHDEncContext *ctx = avctx->priv_data;
247 const uint8_t header_prefix[5] = { 0x00,0x00,0x02,0x80,0x01 };
251 memcpy(buf, header_prefix, 5);
252 buf[5] = ctx->interlaced ? ctx->cur_field+2 : 0x01;
253 buf[6] = 0x80; // crc flag off
254 buf[7] = 0xa0; // reserved
255 AV_WB16(buf + 0x18, avctx->height>>ctx->interlaced); // ALPF
256 AV_WB16(buf + 0x1a, avctx->width); // SPL
257 AV_WB16(buf + 0x1d, avctx->height>>ctx->interlaced); // NAL
259 buf[0x21] = 0x38; // FIXME 8 bit per comp
260 buf[0x22] = 0x88 + (ctx->interlaced<<2);
261 AV_WB32(buf + 0x28, ctx->cid); // CID
262 buf[0x2c] = ctx->interlaced ? 0 : 0x80;
264 buf[0x5f] = 0x01; // UDL
266 buf[0x167] = 0x02; // reserved
267 AV_WB16(buf + 0x16a, ctx->m.mb_height * 4 + 4); // MSIPS
268 buf[0x16d] = ctx->m.mb_height; // Ns
269 buf[0x16f] = 0x10; // reserved
271 ctx->msip = buf + 0x170;
275 static av_always_inline void dnxhd_encode_dc(DNXHDEncContext *ctx, int diff)
279 nbits = av_log2_16bit(-2*diff);
282 nbits = av_log2_16bit(2*diff);
284 put_bits(&ctx->m.pb, ctx->cid_table->dc_bits[nbits] + nbits,
285 (ctx->cid_table->dc_codes[nbits]<<nbits) + (diff & ((1 << nbits) - 1)));
288 static av_always_inline void dnxhd_encode_block(DNXHDEncContext *ctx, DCTELEM *block, int last_index, int n)
290 int last_non_zero = 0;
293 dnxhd_encode_dc(ctx, block[0] - ctx->m.last_dc[n]);
294 ctx->m.last_dc[n] = block[0];
296 for (i = 1; i <= last_index; i++) {
297 j = ctx->m.intra_scantable.permutated[i];
300 int run_level = i - last_non_zero - 1;
301 int rlevel = (slevel<<1)|!!run_level;
302 put_bits(&ctx->m.pb, ctx->vlc_bits[rlevel], ctx->vlc_codes[rlevel]);
304 put_bits(&ctx->m.pb, ctx->run_bits[run_level], ctx->run_codes[run_level]);
308 put_bits(&ctx->m.pb, ctx->vlc_bits[0], ctx->vlc_codes[0]); // EOB
311 static av_always_inline void dnxhd_unquantize_c(DNXHDEncContext *ctx, DCTELEM *block, int n, int qscale, int last_index)
313 const uint8_t *weight_matrix;
317 weight_matrix = (n&2) ? ctx->cid_table->chroma_weight : ctx->cid_table->luma_weight;
319 for (i = 1; i <= last_index; i++) {
320 int j = ctx->m.intra_scantable.permutated[i];
324 level = (1-2*level) * qscale * weight_matrix[i];
325 if (weight_matrix[i] != 32)
330 level = (2*level+1) * qscale * weight_matrix[i];
331 if (weight_matrix[i] != 32)
340 static av_always_inline int dnxhd_ssd_block(DCTELEM *qblock, DCTELEM *block)
344 for (i = 0; i < 64; i++)
345 score += (block[i]-qblock[i])*(block[i]-qblock[i]);
349 static av_always_inline int dnxhd_calc_ac_bits(DNXHDEncContext *ctx, DCTELEM *block, int last_index)
351 int last_non_zero = 0;
354 for (i = 1; i <= last_index; i++) {
355 j = ctx->m.intra_scantable.permutated[i];
358 int run_level = i - last_non_zero - 1;
359 bits += ctx->vlc_bits[(level<<1)|!!run_level]+ctx->run_bits[run_level];
366 static av_always_inline void dnxhd_get_blocks(DNXHDEncContext *ctx, int mb_x, int mb_y)
368 const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize) + (mb_x << 4);
369 const uint8_t *ptr_u = ctx->thread[0]->src[1] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
370 const uint8_t *ptr_v = ctx->thread[0]->src[2] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
371 DSPContext *dsp = &ctx->m.dsp;
373 dsp->get_pixels(ctx->blocks[0], ptr_y , ctx->m.linesize);
374 dsp->get_pixels(ctx->blocks[1], ptr_y + 8, ctx->m.linesize);
375 dsp->get_pixels(ctx->blocks[2], ptr_u , ctx->m.uvlinesize);
376 dsp->get_pixels(ctx->blocks[3], ptr_v , ctx->m.uvlinesize);
378 if (mb_y+1 == ctx->m.mb_height && ctx->m.avctx->height == 1080) {
379 if (ctx->interlaced) {
380 ctx->get_pixels_8x4_sym(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
381 ctx->get_pixels_8x4_sym(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
382 ctx->get_pixels_8x4_sym(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
383 ctx->get_pixels_8x4_sym(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
385 dsp->clear_block(ctx->blocks[4]); dsp->clear_block(ctx->blocks[5]);
386 dsp->clear_block(ctx->blocks[6]); dsp->clear_block(ctx->blocks[7]);
389 dsp->get_pixels(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
390 dsp->get_pixels(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
391 dsp->get_pixels(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
392 dsp->get_pixels(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
396 static av_always_inline int dnxhd_switch_matrix(DNXHDEncContext *ctx, int i)
399 ctx->m.q_intra_matrix16 = ctx->qmatrix_c16;
400 ctx->m.q_intra_matrix = ctx->qmatrix_c;
403 ctx->m.q_intra_matrix16 = ctx->qmatrix_l16;
404 ctx->m.q_intra_matrix = ctx->qmatrix_l;
409 static int dnxhd_calc_bits_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
411 DNXHDEncContext *ctx = avctx->priv_data;
412 int mb_y = jobnr, mb_x;
413 int qscale = ctx->qscale;
414 LOCAL_ALIGNED_16(DCTELEM, block, [64]);
415 ctx = ctx->thread[threadnr];
419 ctx->m.last_dc[2] = 1024;
421 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
422 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
428 dnxhd_get_blocks(ctx, mb_x, mb_y);
430 for (i = 0; i < 8; i++) {
431 DCTELEM *src_block = ctx->blocks[i];
432 int overflow, nbits, diff, last_index;
433 int n = dnxhd_switch_matrix(ctx, i);
435 memcpy(block, src_block, 64*sizeof(*block));
436 last_index = ctx->m.dct_quantize(&ctx->m, block, i, qscale, &overflow);
437 ac_bits += dnxhd_calc_ac_bits(ctx, block, last_index);
439 diff = block[0] - ctx->m.last_dc[n];
440 if (diff < 0) nbits = av_log2_16bit(-2*diff);
441 else nbits = av_log2_16bit( 2*diff);
442 dc_bits += ctx->cid_table->dc_bits[nbits] + nbits;
444 ctx->m.last_dc[n] = block[0];
446 if (avctx->mb_decision == FF_MB_DECISION_RD || !RC_VARIANCE) {
447 dnxhd_unquantize_c(ctx, block, i, qscale, last_index);
448 ctx->m.dsp.idct(block);
449 ssd += dnxhd_ssd_block(block, src_block);
452 ctx->mb_rc[qscale][mb].ssd = ssd;
453 ctx->mb_rc[qscale][mb].bits = ac_bits+dc_bits+12+8*ctx->vlc_bits[0];
458 static int dnxhd_encode_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
460 DNXHDEncContext *ctx = avctx->priv_data;
461 int mb_y = jobnr, mb_x;
462 ctx = ctx->thread[threadnr];
463 init_put_bits(&ctx->m.pb, (uint8_t *)arg + 640 + ctx->slice_offs[jobnr], ctx->slice_size[jobnr]);
467 ctx->m.last_dc[2] = 1024;
468 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
469 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
470 int qscale = ctx->mb_qscale[mb];
473 put_bits(&ctx->m.pb, 12, qscale<<1);
475 dnxhd_get_blocks(ctx, mb_x, mb_y);
477 for (i = 0; i < 8; i++) {
478 DCTELEM *block = ctx->blocks[i];
479 int last_index, overflow;
480 int n = dnxhd_switch_matrix(ctx, i);
481 last_index = ctx->m.dct_quantize(&ctx->m, block, i, qscale, &overflow);
483 dnxhd_encode_block(ctx, block, last_index, n);
484 //STOP_TIMER("encode_block");
487 if (put_bits_count(&ctx->m.pb)&31)
488 put_bits(&ctx->m.pb, 32-(put_bits_count(&ctx->m.pb)&31), 0);
489 flush_put_bits(&ctx->m.pb);
493 static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx)
497 for (mb_y = 0; mb_y < ctx->m.mb_height; mb_y++) {
499 ctx->slice_offs[mb_y] = offset;
500 ctx->slice_size[mb_y] = 0;
501 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
502 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
503 ctx->slice_size[mb_y] += ctx->mb_bits[mb];
505 ctx->slice_size[mb_y] = (ctx->slice_size[mb_y]+31)&~31;
506 ctx->slice_size[mb_y] >>= 3;
507 thread_size = ctx->slice_size[mb_y];
508 offset += thread_size;
512 static int dnxhd_mb_var_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
514 DNXHDEncContext *ctx = avctx->priv_data;
515 int mb_y = jobnr, mb_x;
516 ctx = ctx->thread[threadnr];
517 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
518 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
519 uint8_t *pix = ctx->thread[0]->src[0] + ((mb_y<<4) * ctx->m.linesize) + (mb_x<<4);
520 int sum = ctx->m.dsp.pix_sum(pix, ctx->m.linesize);
521 int varc = (ctx->m.dsp.pix_norm1(pix, ctx->m.linesize) - (((unsigned)(sum*sum))>>8)+128)>>8;
522 ctx->mb_cmp[mb].value = varc;
523 ctx->mb_cmp[mb].mb = mb;
528 static int dnxhd_encode_rdo(AVCodecContext *avctx, DNXHDEncContext *ctx)
530 int lambda, up_step, down_step;
531 int last_lower = INT_MAX, last_higher = 0;
534 for (q = 1; q < avctx->qmax; q++) {
536 avctx->execute2(avctx, dnxhd_calc_bits_thread, NULL, NULL, ctx->m.mb_height);
538 up_step = down_step = 2<<LAMBDA_FRAC_BITS;
539 lambda = ctx->lambda;
544 if (lambda == last_higher) {
546 end = 1; // need to set final qscales/bits
548 for (y = 0; y < ctx->m.mb_height; y++) {
549 for (x = 0; x < ctx->m.mb_width; x++) {
550 unsigned min = UINT_MAX;
552 int mb = y*ctx->m.mb_width+x;
553 for (q = 1; q < avctx->qmax; q++) {
554 unsigned score = ctx->mb_rc[q][mb].bits*lambda+(ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);
560 bits += ctx->mb_rc[qscale][mb].bits;
561 ctx->mb_qscale[mb] = qscale;
562 ctx->mb_bits[mb] = ctx->mb_rc[qscale][mb].bits;
564 bits = (bits+31)&~31; // padding
565 if (bits > ctx->frame_bits)
568 //av_dlog(ctx->m.avctx, "lambda %d, up %u, down %u, bits %d, frame %d\n",
569 // lambda, last_higher, last_lower, bits, ctx->frame_bits);
571 if (bits > ctx->frame_bits)
575 if (bits < ctx->frame_bits) {
576 last_lower = FFMIN(lambda, last_lower);
577 if (last_higher != 0)
578 lambda = (lambda+last_higher)>>1;
581 down_step *= 5; // XXX tune ?
582 up_step = 1<<LAMBDA_FRAC_BITS;
583 lambda = FFMAX(1, lambda);
584 if (lambda == last_lower)
587 last_higher = FFMAX(lambda, last_higher);
588 if (last_lower != INT_MAX)
589 lambda = (lambda+last_lower)>>1;
590 else if ((int64_t)lambda + up_step > INT_MAX)
594 up_step = FFMIN((int64_t)up_step*5, INT_MAX);
595 down_step = 1<<LAMBDA_FRAC_BITS;
598 //av_dlog(ctx->m.avctx, "out lambda %d\n", lambda);
599 ctx->lambda = lambda;
603 static int dnxhd_find_qscale(DNXHDEncContext *ctx)
609 int last_lower = INT_MAX;
613 qscale = ctx->qscale;
616 ctx->qscale = qscale;
617 // XXX avoid recalculating bits
618 ctx->m.avctx->execute2(ctx->m.avctx, dnxhd_calc_bits_thread, NULL, NULL, ctx->m.mb_height);
619 for (y = 0; y < ctx->m.mb_height; y++) {
620 for (x = 0; x < ctx->m.mb_width; x++)
621 bits += ctx->mb_rc[qscale][y*ctx->m.mb_width+x].bits;
622 bits = (bits+31)&~31; // padding
623 if (bits > ctx->frame_bits)
626 //av_dlog(ctx->m.avctx, "%d, qscale %d, bits %d, frame %d, higher %d, lower %d\n",
627 // ctx->m.avctx->frame_number, qscale, bits, ctx->frame_bits, last_higher, last_lower);
628 if (bits < ctx->frame_bits) {
631 if (last_higher == qscale - 1) {
632 qscale = last_higher;
635 last_lower = FFMIN(qscale, last_lower);
636 if (last_higher != 0)
637 qscale = (qscale+last_higher)>>1;
639 qscale -= down_step++;
644 if (last_lower == qscale + 1)
646 last_higher = FFMAX(qscale, last_higher);
647 if (last_lower != INT_MAX)
648 qscale = (qscale+last_lower)>>1;
652 if (qscale >= ctx->m.avctx->qmax)
656 //av_dlog(ctx->m.avctx, "out qscale %d\n", qscale);
657 ctx->qscale = qscale;
661 #define BUCKET_BITS 8
662 #define RADIX_PASSES 4
663 #define NBUCKETS (1 << BUCKET_BITS)
665 static inline int get_bucket(int value, int shift)
668 value &= NBUCKETS - 1;
669 return NBUCKETS - 1 - value;
672 static void radix_count(const RCCMPEntry *data, int size, int buckets[RADIX_PASSES][NBUCKETS])
675 memset(buckets, 0, sizeof(buckets[0][0]) * RADIX_PASSES * NBUCKETS);
676 for (i = 0; i < size; i++) {
677 int v = data[i].value;
678 for (j = 0; j < RADIX_PASSES; j++) {
679 buckets[j][get_bucket(v, 0)]++;
684 for (j = 0; j < RADIX_PASSES; j++) {
686 for (i = NBUCKETS - 1; i >= 0; i--)
687 buckets[j][i] = offset -= buckets[j][i];
688 assert(!buckets[j][0]);
692 static void radix_sort_pass(RCCMPEntry *dst, const RCCMPEntry *data, int size, int buckets[NBUCKETS], int pass)
694 int shift = pass * BUCKET_BITS;
696 for (i = 0; i < size; i++) {
697 int v = get_bucket(data[i].value, shift);
698 int pos = buckets[v]++;
703 static void radix_sort(RCCMPEntry *data, int size)
705 int buckets[RADIX_PASSES][NBUCKETS];
706 RCCMPEntry *tmp = av_malloc(sizeof(*tmp) * size);
707 radix_count(data, size, buckets);
708 radix_sort_pass(tmp, data, size, buckets[0], 0);
709 radix_sort_pass(data, tmp, size, buckets[1], 1);
710 if (buckets[2][NBUCKETS - 1] || buckets[3][NBUCKETS - 1]) {
711 radix_sort_pass(tmp, data, size, buckets[2], 2);
712 radix_sort_pass(data, tmp, size, buckets[3], 3);
717 static int dnxhd_encode_fast(AVCodecContext *avctx, DNXHDEncContext *ctx)
721 if ((ret = dnxhd_find_qscale(ctx)) < 0)
723 for (y = 0; y < ctx->m.mb_height; y++) {
724 for (x = 0; x < ctx->m.mb_width; x++) {
725 int mb = y*ctx->m.mb_width+x;
727 ctx->mb_qscale[mb] = ctx->qscale;
728 ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale][mb].bits;
729 max_bits += ctx->mb_rc[ctx->qscale][mb].bits;
731 delta_bits = ctx->mb_rc[ctx->qscale][mb].bits-ctx->mb_rc[ctx->qscale+1][mb].bits;
732 ctx->mb_cmp[mb].mb = mb;
733 ctx->mb_cmp[mb].value = delta_bits ?
734 ((ctx->mb_rc[ctx->qscale][mb].ssd-ctx->mb_rc[ctx->qscale+1][mb].ssd)*100)/delta_bits
735 : INT_MIN; //avoid increasing qscale
738 max_bits += 31; //worst padding
742 avctx->execute2(avctx, dnxhd_mb_var_thread, NULL, NULL, ctx->m.mb_height);
743 radix_sort(ctx->mb_cmp, ctx->m.mb_num);
744 for (x = 0; x < ctx->m.mb_num && max_bits > ctx->frame_bits; x++) {
745 int mb = ctx->mb_cmp[x].mb;
746 max_bits -= ctx->mb_rc[ctx->qscale][mb].bits - ctx->mb_rc[ctx->qscale+1][mb].bits;
747 ctx->mb_qscale[mb] = ctx->qscale+1;
748 ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale+1][mb].bits;
754 static void dnxhd_load_picture(DNXHDEncContext *ctx, const AVFrame *frame)
758 for (i = 0; i < 3; i++) {
759 ctx->frame.data[i] = frame->data[i];
760 ctx->frame.linesize[i] = frame->linesize[i];
763 for (i = 0; i < ctx->m.avctx->thread_count; i++) {
764 ctx->thread[i]->m.linesize = ctx->frame.linesize[0]<<ctx->interlaced;
765 ctx->thread[i]->m.uvlinesize = ctx->frame.linesize[1]<<ctx->interlaced;
766 ctx->thread[i]->dct_y_offset = ctx->m.linesize *8;
767 ctx->thread[i]->dct_uv_offset = ctx->m.uvlinesize*8;
770 ctx->frame.interlaced_frame = frame->interlaced_frame;
771 ctx->cur_field = frame->interlaced_frame && !frame->top_field_first;
774 static int dnxhd_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data)
776 DNXHDEncContext *ctx = avctx->priv_data;
780 if (buf_size < ctx->cid_table->frame_size) {
781 av_log(avctx, AV_LOG_ERROR, "output buffer is too small to compress picture\n");
785 dnxhd_load_picture(ctx, data);
788 for (i = 0; i < 3; i++) {
789 ctx->src[i] = ctx->frame.data[i];
790 if (ctx->interlaced && ctx->cur_field)
791 ctx->src[i] += ctx->frame.linesize[i];
794 dnxhd_write_header(avctx, buf);
796 if (avctx->mb_decision == FF_MB_DECISION_RD)
797 ret = dnxhd_encode_rdo(avctx, ctx);
799 ret = dnxhd_encode_fast(avctx, ctx);
801 av_log(avctx, AV_LOG_ERROR,
802 "picture could not fit ratecontrol constraints, increase qmax\n");
806 dnxhd_setup_threads_slices(ctx);
809 for (i = 0; i < ctx->m.mb_height; i++) {
810 AV_WB32(ctx->msip + i * 4, offset);
811 offset += ctx->slice_size[i];
812 assert(!(ctx->slice_size[i] & 3));
815 avctx->execute2(avctx, dnxhd_encode_thread, buf, NULL, ctx->m.mb_height);
817 assert(640 + offset + 4 <= ctx->cid_table->coding_unit_size);
818 memset(buf + 640 + offset, 0, ctx->cid_table->coding_unit_size - 4 - offset - 640);
820 AV_WB32(buf + ctx->cid_table->coding_unit_size - 4, 0x600DC0DE); // EOF
822 if (ctx->interlaced && first_field) {
825 buf += ctx->cid_table->coding_unit_size;
826 buf_size -= ctx->cid_table->coding_unit_size;
827 goto encode_coding_unit;
830 ctx->frame.quality = ctx->qscale*FF_QP2LAMBDA;
832 return ctx->cid_table->frame_size;
835 static int dnxhd_encode_end(AVCodecContext *avctx)
837 DNXHDEncContext *ctx = avctx->priv_data;
838 int max_level = 1<<(ctx->cid_table->bit_depth+2);
841 av_free(ctx->vlc_codes-max_level*2);
842 av_free(ctx->vlc_bits -max_level*2);
843 av_freep(&ctx->run_codes);
844 av_freep(&ctx->run_bits);
846 av_freep(&ctx->mb_bits);
847 av_freep(&ctx->mb_qscale);
848 av_freep(&ctx->mb_rc);
849 av_freep(&ctx->mb_cmp);
850 av_freep(&ctx->slice_size);
851 av_freep(&ctx->slice_offs);
853 av_freep(&ctx->qmatrix_c);
854 av_freep(&ctx->qmatrix_l);
855 av_freep(&ctx->qmatrix_c16);
856 av_freep(&ctx->qmatrix_l16);
858 for (i = 1; i < avctx->thread_count; i++)
859 av_freep(&ctx->thread[i]);
864 AVCodec ff_dnxhd_encoder = {
868 sizeof(DNXHDEncContext),
870 dnxhd_encode_picture,
872 .capabilities = CODEC_CAP_SLICE_THREADS,
873 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_NONE},
874 .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
875 .priv_class = &class,