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"
32 int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
34 #define LAMBDA_FRAC_BITS 10
36 static av_always_inline void dnxhd_get_pixels_8x4(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
39 for (i = 0; i < 4; i++) {
40 block[0] = pixels[0]; block[1] = pixels[1];
41 block[2] = pixels[2]; block[3] = pixels[3];
42 block[4] = pixels[4]; block[5] = pixels[5];
43 block[6] = pixels[6]; block[7] = pixels[7];
47 memcpy(block , block- 8, sizeof(*block)*8);
48 memcpy(block+ 8, block-16, sizeof(*block)*8);
49 memcpy(block+16, block-24, sizeof(*block)*8);
50 memcpy(block+24, block-32, sizeof(*block)*8);
53 static int dnxhd_init_vlc(DNXHDEncContext *ctx)
56 int max_level = 1<<(ctx->cid_table->bit_depth+2);
58 CHECKED_ALLOCZ(ctx->vlc_codes, max_level*4*sizeof(*ctx->vlc_codes));
59 CHECKED_ALLOCZ(ctx->vlc_bits, max_level*4*sizeof(*ctx->vlc_bits));
60 CHECKED_ALLOCZ(ctx->run_codes, 63*2);
61 CHECKED_ALLOCZ(ctx->run_bits, 63);
63 ctx->vlc_codes += max_level*2;
64 ctx->vlc_bits += max_level*2;
65 for (level = -max_level; level < max_level; level++) {
66 for (run = 0; run < 2; run++) {
67 int index = (level<<1)|run;
68 int sign, offset = 0, alevel = level;
70 MASK_ABS(sign, alevel);
72 offset = (alevel-1)>>6;
75 for (j = 0; j < 257; j++) {
76 if (ctx->cid_table->ac_level[j] == alevel &&
77 (!offset || (ctx->cid_table->ac_index_flag[j] && offset)) &&
78 (!run || (ctx->cid_table->ac_run_flag [j] && run))) {
79 assert(!ctx->vlc_codes[index]);
81 ctx->vlc_codes[index] = (ctx->cid_table->ac_codes[j]<<1)|(sign&1);
82 ctx->vlc_bits [index] = ctx->cid_table->ac_bits[j]+1;
84 ctx->vlc_codes[index] = ctx->cid_table->ac_codes[j];
85 ctx->vlc_bits [index] = ctx->cid_table->ac_bits [j];
90 assert(!alevel || j < 257);
92 ctx->vlc_codes[index] = (ctx->vlc_codes[index]<<ctx->cid_table->index_bits)|offset;
93 ctx->vlc_bits [index]+= ctx->cid_table->index_bits;
97 for (i = 0; i < 62; i++) {
98 int run = ctx->cid_table->run[i];
100 ctx->run_codes[run] = ctx->cid_table->run_codes[i];
101 ctx->run_bits [run] = ctx->cid_table->run_bits[i];
108 static int dnxhd_init_qmat(DNXHDEncContext *ctx, int lbias, int cbias)
110 // init first elem to 1 to avoid div by 0 in convert_matrix
111 uint16_t weight_matrix[64] = {1,}; // convert_matrix needs uint16_t*
114 CHECKED_ALLOCZ(ctx->qmatrix_l, (ctx->m.avctx->qmax+1) * 64 * sizeof(int));
115 CHECKED_ALLOCZ(ctx->qmatrix_c, (ctx->m.avctx->qmax+1) * 64 * sizeof(int));
116 CHECKED_ALLOCZ(ctx->qmatrix_l16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));
117 CHECKED_ALLOCZ(ctx->qmatrix_c16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));
119 for (i = 1; i < 64; i++) {
120 int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
121 weight_matrix[j] = ctx->cid_table->luma_weight[i];
123 ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_l, ctx->qmatrix_l16, weight_matrix,
124 ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
125 for (i = 1; i < 64; i++) {
126 int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
127 weight_matrix[j] = ctx->cid_table->chroma_weight[i];
129 ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_c, ctx->qmatrix_c16, weight_matrix,
130 ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
131 for (qscale = 1; qscale <= ctx->m.avctx->qmax; qscale++) {
132 for (i = 0; i < 64; i++) {
133 ctx->qmatrix_l [qscale] [i] <<= 2; ctx->qmatrix_c [qscale] [i] <<= 2;
134 ctx->qmatrix_l16[qscale][0][i] <<= 2; ctx->qmatrix_l16[qscale][1][i] <<= 2;
135 ctx->qmatrix_c16[qscale][0][i] <<= 2; ctx->qmatrix_c16[qscale][1][i] <<= 2;
143 static int dnxhd_init_rc(DNXHDEncContext *ctx)
145 CHECKED_ALLOCZ(ctx->mb_rc, 8160*ctx->m.avctx->qmax*sizeof(RCEntry));
146 if (ctx->m.avctx->mb_decision != FF_MB_DECISION_RD)
147 CHECKED_ALLOCZ(ctx->mb_cmp, ctx->m.mb_num*sizeof(RCCMPEntry));
149 ctx->frame_bits = (ctx->cid_table->coding_unit_size - 640 - 4) * 8;
151 ctx->lambda = 2<<LAMBDA_FRAC_BITS; // qscale 2
157 static int dnxhd_encode_init(AVCodecContext *avctx)
159 DNXHDEncContext *ctx = avctx->priv_data;
162 ctx->cid = ff_dnxhd_find_cid(avctx);
163 if (!ctx->cid || avctx->pix_fmt != PIX_FMT_YUV422P) {
164 av_log(avctx, AV_LOG_ERROR, "video parameters incompatible with DNxHD\n");
167 av_log(avctx, AV_LOG_DEBUG, "cid %d\n", ctx->cid);
169 index = ff_dnxhd_get_cid_table(ctx->cid);
170 ctx->cid_table = &ff_dnxhd_cid_table[index];
172 ctx->m.avctx = avctx;
176 ctx->get_pixels_8x4_sym = dnxhd_get_pixels_8x4;
178 dsputil_init(&ctx->m.dsp, avctx);
179 ff_dct_common_init(&ctx->m);
181 ff_dnxhd_init_mmx(ctx);
183 if (!ctx->m.dct_quantize)
184 ctx->m.dct_quantize = dct_quantize_c;
186 ctx->m.mb_height = (avctx->height + 15) / 16;
187 ctx->m.mb_width = (avctx->width + 15) / 16;
189 if (avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
191 ctx->m.mb_height /= 2;
194 ctx->m.mb_num = ctx->m.mb_height * ctx->m.mb_width;
196 if (avctx->intra_quant_bias != FF_DEFAULT_QUANT_BIAS)
197 ctx->m.intra_quant_bias = avctx->intra_quant_bias;
198 if (dnxhd_init_qmat(ctx, ctx->m.intra_quant_bias, 0) < 0) // XXX tune lbias/cbias
201 if (dnxhd_init_vlc(ctx) < 0)
203 if (dnxhd_init_rc(ctx) < 0)
206 CHECKED_ALLOCZ(ctx->slice_size, ctx->m.mb_height*sizeof(uint32_t));
207 CHECKED_ALLOCZ(ctx->mb_bits, ctx->m.mb_num *sizeof(uint16_t));
208 CHECKED_ALLOCZ(ctx->mb_qscale, ctx->m.mb_num *sizeof(uint8_t));
210 ctx->frame.key_frame = 1;
211 ctx->frame.pict_type = FF_I_TYPE;
212 ctx->m.avctx->coded_frame = &ctx->frame;
214 if (avctx->thread_count > MAX_THREADS || (avctx->thread_count > ctx->m.mb_height)) {
215 av_log(avctx, AV_LOG_ERROR, "too many threads\n");
219 ctx->thread[0] = ctx;
220 for (i = 1; i < avctx->thread_count; i++) {
221 ctx->thread[i] = av_malloc(sizeof(DNXHDEncContext));
222 memcpy(ctx->thread[i], ctx, sizeof(DNXHDEncContext));
225 for (i = 0; i < avctx->thread_count; i++) {
226 ctx->thread[i]->m.start_mb_y = (ctx->m.mb_height*(i ) + avctx->thread_count/2) / avctx->thread_count;
227 ctx->thread[i]->m.end_mb_y = (ctx->m.mb_height*(i+1) + avctx->thread_count/2) / avctx->thread_count;
231 fail: //for CHECKED_ALLOCZ
235 static int dnxhd_write_header(AVCodecContext *avctx, uint8_t *buf)
237 DNXHDEncContext *ctx = avctx->priv_data;
238 const uint8_t header_prefix[5] = { 0x00,0x00,0x02,0x80,0x01 };
240 memcpy(buf, header_prefix, 5);
241 buf[5] = ctx->interlaced ? ctx->cur_field+2 : 0x01;
242 buf[6] = 0x80; // crc flag off
243 buf[7] = 0xa0; // reserved
244 AV_WB16(buf + 0x18, avctx->height); // ALPF
245 AV_WB16(buf + 0x1a, avctx->width); // SPL
246 AV_WB16(buf + 0x1d, avctx->height); // NAL
248 buf[0x21] = 0x38; // FIXME 8 bit per comp
249 buf[0x22] = 0x88 + (ctx->frame.interlaced_frame<<2);
250 AV_WB32(buf + 0x28, ctx->cid); // CID
251 buf[0x2c] = ctx->interlaced ? 0 : 0x80;
253 buf[0x5f] = 0x01; // UDL
255 buf[0x167] = 0x02; // reserved
256 AV_WB16(buf + 0x16a, ctx->m.mb_height * 4 + 4); // MSIPS
257 buf[0x16d] = ctx->m.mb_height; // Ns
258 buf[0x16f] = 0x10; // reserved
260 ctx->msip = buf + 0x170;
264 static av_always_inline void dnxhd_encode_dc(DNXHDEncContext *ctx, int diff)
268 nbits = av_log2_16bit(-2*diff);
271 nbits = av_log2_16bit(2*diff);
273 put_bits(&ctx->m.pb, ctx->cid_table->dc_bits[nbits] + nbits,
274 (ctx->cid_table->dc_codes[nbits]<<nbits) + (diff & ((1 << nbits) - 1)));
277 static av_always_inline void dnxhd_encode_block(DNXHDEncContext *ctx, DCTELEM *block, int last_index, int n)
279 int last_non_zero = 0;
282 dnxhd_encode_dc(ctx, block[0] - ctx->m.last_dc[n]);
283 ctx->m.last_dc[n] = block[0];
285 for (i = 1; i <= last_index; i++) {
286 j = ctx->m.intra_scantable.permutated[i];
289 int run_level = i - last_non_zero - 1;
290 int rlevel = (slevel<<1)|!!run_level;
291 put_bits(&ctx->m.pb, ctx->vlc_bits[rlevel], ctx->vlc_codes[rlevel]);
293 put_bits(&ctx->m.pb, ctx->run_bits[run_level], ctx->run_codes[run_level]);
297 put_bits(&ctx->m.pb, ctx->vlc_bits[0], ctx->vlc_codes[0]); // EOB
300 static av_always_inline void dnxhd_unquantize_c(DNXHDEncContext *ctx, DCTELEM *block, int n, int qscale, int last_index)
302 const uint8_t *weight_matrix;
306 weight_matrix = (n&2) ? ctx->cid_table->chroma_weight : ctx->cid_table->luma_weight;
308 for (i = 1; i <= last_index; i++) {
309 int j = ctx->m.intra_scantable.permutated[i];
313 level = (1-2*level) * qscale * weight_matrix[i];
314 if (weight_matrix[i] != 32)
319 level = (2*level+1) * qscale * weight_matrix[i];
320 if (weight_matrix[i] != 32)
329 static av_always_inline int dnxhd_ssd_block(DCTELEM *qblock, DCTELEM *block)
333 for (i = 0; i < 64; i++)
334 score += (block[i]-qblock[i])*(block[i]-qblock[i]);
338 static av_always_inline int dnxhd_calc_ac_bits(DNXHDEncContext *ctx, DCTELEM *block, int last_index)
340 int last_non_zero = 0;
343 for (i = 1; i <= last_index; i++) {
344 j = ctx->m.intra_scantable.permutated[i];
347 int run_level = i - last_non_zero - 1;
348 bits += ctx->vlc_bits[(level<<1)|!!run_level]+ctx->run_bits[run_level];
355 static av_always_inline void dnxhd_get_blocks(DNXHDEncContext *ctx, int mb_x, int mb_y)
357 const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize) + (mb_x << 4);
358 const uint8_t *ptr_u = ctx->thread[0]->src[1] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
359 const uint8_t *ptr_v = ctx->thread[0]->src[2] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
360 DSPContext *dsp = &ctx->m.dsp;
362 dsp->get_pixels(ctx->blocks[0], ptr_y , ctx->m.linesize);
363 dsp->get_pixels(ctx->blocks[1], ptr_y + 8, ctx->m.linesize);
364 dsp->get_pixels(ctx->blocks[2], ptr_u , ctx->m.uvlinesize);
365 dsp->get_pixels(ctx->blocks[3], ptr_v , ctx->m.uvlinesize);
367 if (mb_y+1 == ctx->m.mb_height && ctx->m.avctx->height == 1080) {
368 if (ctx->interlaced) {
369 ctx->get_pixels_8x4_sym(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
370 ctx->get_pixels_8x4_sym(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
371 ctx->get_pixels_8x4_sym(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
372 ctx->get_pixels_8x4_sym(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
374 dsp->clear_block(ctx->blocks[4]); dsp->clear_block(ctx->blocks[5]);
375 dsp->clear_block(ctx->blocks[6]); dsp->clear_block(ctx->blocks[7]);
378 dsp->get_pixels(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
379 dsp->get_pixels(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
380 dsp->get_pixels(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
381 dsp->get_pixels(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
385 static av_always_inline int dnxhd_switch_matrix(DNXHDEncContext *ctx, int i)
388 ctx->m.q_intra_matrix16 = ctx->qmatrix_c16;
389 ctx->m.q_intra_matrix = ctx->qmatrix_c;
392 ctx->m.q_intra_matrix16 = ctx->qmatrix_l16;
393 ctx->m.q_intra_matrix = ctx->qmatrix_l;
398 static int dnxhd_calc_bits_thread(AVCodecContext *avctx, void *arg)
400 DNXHDEncContext *ctx = *(void**)arg;
402 int qscale = ctx->thread[0]->qscale;
404 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
407 ctx->m.last_dc[2] = 1024;
409 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
410 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
416 dnxhd_get_blocks(ctx, mb_x, mb_y);
418 for (i = 0; i < 8; i++) {
419 DECLARE_ALIGNED_16(DCTELEM, block[64]);
420 DCTELEM *src_block = ctx->blocks[i];
421 int overflow, nbits, diff, last_index;
422 int n = dnxhd_switch_matrix(ctx, i);
424 memcpy(block, src_block, sizeof(block));
425 last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);
426 ac_bits += dnxhd_calc_ac_bits(ctx, block, last_index);
428 diff = block[0] - ctx->m.last_dc[n];
429 if (diff < 0) nbits = av_log2_16bit(-2*diff);
430 else nbits = av_log2_16bit( 2*diff);
431 dc_bits += ctx->cid_table->dc_bits[nbits] + nbits;
433 ctx->m.last_dc[n] = block[0];
435 if (avctx->mb_decision == FF_MB_DECISION_RD || !RC_VARIANCE) {
436 dnxhd_unquantize_c(ctx, block, i, qscale, last_index);
437 ctx->m.dsp.idct(block);
438 ssd += dnxhd_ssd_block(block, src_block);
441 ctx->mb_rc[qscale][mb].ssd = ssd;
442 ctx->mb_rc[qscale][mb].bits = ac_bits+dc_bits+12+8*ctx->vlc_bits[0];
448 static int dnxhd_encode_thread(AVCodecContext *avctx, void *arg)
450 DNXHDEncContext *ctx = *(void**)arg;
453 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
456 ctx->m.last_dc[2] = 1024;
457 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
458 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
459 int qscale = ctx->mb_qscale[mb];
462 put_bits(&ctx->m.pb, 12, qscale<<1);
464 dnxhd_get_blocks(ctx, mb_x, mb_y);
466 for (i = 0; i < 8; i++) {
467 DCTELEM *block = ctx->blocks[i];
468 int last_index, overflow;
469 int n = dnxhd_switch_matrix(ctx, i);
470 last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);
472 dnxhd_encode_block(ctx, block, last_index, n);
473 //STOP_TIMER("encode_block");
476 if (put_bits_count(&ctx->m.pb)&31)
477 put_bits(&ctx->m.pb, 32-(put_bits_count(&ctx->m.pb)&31), 0);
479 flush_put_bits(&ctx->m.pb);
483 static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx, uint8_t *buf)
487 for (i = 0; i < ctx->m.avctx->thread_count; i++) {
489 for (mb_y = ctx->thread[i]->m.start_mb_y; mb_y < ctx->thread[i]->m.end_mb_y; mb_y++) {
490 ctx->slice_size[mb_y] = 0;
491 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
492 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
493 ctx->slice_size[mb_y] += ctx->mb_bits[mb];
495 ctx->slice_size[mb_y] = (ctx->slice_size[mb_y]+31)&~31;
496 ctx->slice_size[mb_y] >>= 3;
497 thread_size += ctx->slice_size[mb_y];
499 init_put_bits(&ctx->thread[i]->m.pb, buf + 640 + offset, thread_size);
500 offset += thread_size;
504 static int dnxhd_mb_var_thread(AVCodecContext *avctx, void *arg)
506 DNXHDEncContext *ctx = *(void**)arg;
508 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
509 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
510 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
511 uint8_t *pix = ctx->thread[0]->src[0] + ((mb_y<<4) * ctx->m.linesize) + (mb_x<<4);
512 int sum = ctx->m.dsp.pix_sum(pix, ctx->m.linesize);
513 int varc = (ctx->m.dsp.pix_norm1(pix, ctx->m.linesize) - (((unsigned)(sum*sum))>>8)+128)>>8;
514 ctx->mb_cmp[mb].value = varc;
515 ctx->mb_cmp[mb].mb = mb;
521 static int dnxhd_encode_rdo(AVCodecContext *avctx, DNXHDEncContext *ctx)
523 int lambda, up_step, down_step;
524 int last_lower = INT_MAX, last_higher = 0;
527 for (q = 1; q < avctx->qmax; q++) {
529 avctx->execute(avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count, sizeof(void*));
531 up_step = down_step = 2<<LAMBDA_FRAC_BITS;
532 lambda = ctx->lambda;
537 if (lambda == last_higher) {
539 end = 1; // need to set final qscales/bits
541 for (y = 0; y < ctx->m.mb_height; y++) {
542 for (x = 0; x < ctx->m.mb_width; x++) {
543 unsigned min = UINT_MAX;
545 int mb = y*ctx->m.mb_width+x;
546 for (q = 1; q < avctx->qmax; q++) {
547 unsigned score = ctx->mb_rc[q][mb].bits*lambda+(ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);
553 bits += ctx->mb_rc[qscale][mb].bits;
554 ctx->mb_qscale[mb] = qscale;
555 ctx->mb_bits[mb] = ctx->mb_rc[qscale][mb].bits;
557 bits = (bits+31)&~31; // padding
558 if (bits > ctx->frame_bits)
561 //dprintf(ctx->m.avctx, "lambda %d, up %u, down %u, bits %d, frame %d\n",
562 // lambda, last_higher, last_lower, bits, ctx->frame_bits);
564 if (bits > ctx->frame_bits)
568 if (bits < ctx->frame_bits) {
569 last_lower = FFMIN(lambda, last_lower);
570 if (last_higher != 0)
571 lambda = (lambda+last_higher)>>1;
574 down_step *= 5; // XXX tune ?
575 up_step = 1<<LAMBDA_FRAC_BITS;
576 lambda = FFMAX(1, lambda);
577 if (lambda == last_lower)
580 last_higher = FFMAX(lambda, last_higher);
581 if (last_lower != INT_MAX)
582 lambda = (lambda+last_lower)>>1;
586 down_step = 1<<LAMBDA_FRAC_BITS;
589 //dprintf(ctx->m.avctx, "out lambda %d\n", lambda);
590 ctx->lambda = lambda;
594 static int dnxhd_find_qscale(DNXHDEncContext *ctx)
600 int last_lower = INT_MAX;
604 qscale = ctx->qscale;
607 ctx->qscale = qscale;
608 // XXX avoid recalculating bits
609 ctx->m.avctx->execute(ctx->m.avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, ctx->m.avctx->thread_count, sizeof(void*));
610 for (y = 0; y < ctx->m.mb_height; y++) {
611 for (x = 0; x < ctx->m.mb_width; x++)
612 bits += ctx->mb_rc[qscale][y*ctx->m.mb_width+x].bits;
613 bits = (bits+31)&~31; // padding
614 if (bits > ctx->frame_bits)
617 //dprintf(ctx->m.avctx, "%d, qscale %d, bits %d, frame %d, higher %d, lower %d\n",
618 // ctx->m.avctx->frame_number, qscale, bits, ctx->frame_bits, last_higher, last_lower);
619 if (bits < ctx->frame_bits) {
622 if (last_higher == qscale - 1) {
623 qscale = last_higher;
626 last_lower = FFMIN(qscale, last_lower);
627 if (last_higher != 0)
628 qscale = (qscale+last_higher)>>1;
630 qscale -= down_step++;
635 if (last_lower == qscale + 1)
637 last_higher = FFMAX(qscale, last_higher);
638 if (last_lower != INT_MAX)
639 qscale = (qscale+last_lower)>>1;
643 if (qscale >= ctx->m.avctx->qmax)
647 //dprintf(ctx->m.avctx, "out qscale %d\n", qscale);
648 ctx->qscale = qscale;
652 static int dnxhd_rc_cmp(const void *a, const void *b)
654 return ((const RCCMPEntry *)b)->value - ((const RCCMPEntry *)a)->value;
657 static int dnxhd_encode_fast(AVCodecContext *avctx, DNXHDEncContext *ctx)
661 if ((ret = dnxhd_find_qscale(ctx)) < 0)
663 for (y = 0; y < ctx->m.mb_height; y++) {
664 for (x = 0; x < ctx->m.mb_width; x++) {
665 int mb = y*ctx->m.mb_width+x;
667 ctx->mb_qscale[mb] = ctx->qscale;
668 ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale][mb].bits;
669 max_bits += ctx->mb_rc[ctx->qscale][mb].bits;
671 delta_bits = ctx->mb_rc[ctx->qscale][mb].bits-ctx->mb_rc[ctx->qscale+1][mb].bits;
672 ctx->mb_cmp[mb].mb = mb;
673 ctx->mb_cmp[mb].value = delta_bits ?
674 ((ctx->mb_rc[ctx->qscale][mb].ssd-ctx->mb_rc[ctx->qscale+1][mb].ssd)*100)/delta_bits
675 : INT_MIN; //avoid increasing qscale
678 max_bits += 31; //worst padding
682 avctx->execute(avctx, dnxhd_mb_var_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count, sizeof(void*));
683 qsort(ctx->mb_cmp, ctx->m.mb_num, sizeof(RCEntry), dnxhd_rc_cmp);
684 for (x = 0; x < ctx->m.mb_num && max_bits > ctx->frame_bits; x++) {
685 int mb = ctx->mb_cmp[x].mb;
686 max_bits -= ctx->mb_rc[ctx->qscale][mb].bits - ctx->mb_rc[ctx->qscale+1][mb].bits;
687 ctx->mb_qscale[mb] = ctx->qscale+1;
688 ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale+1][mb].bits;
694 static void dnxhd_load_picture(DNXHDEncContext *ctx, const AVFrame *frame)
698 for (i = 0; i < 3; i++) {
699 ctx->frame.data[i] = frame->data[i];
700 ctx->frame.linesize[i] = frame->linesize[i];
703 for (i = 0; i < ctx->m.avctx->thread_count; i++) {
704 ctx->thread[i]->m.linesize = ctx->frame.linesize[0]<<ctx->interlaced;
705 ctx->thread[i]->m.uvlinesize = ctx->frame.linesize[1]<<ctx->interlaced;
706 ctx->thread[i]->dct_y_offset = ctx->m.linesize *8;
707 ctx->thread[i]->dct_uv_offset = ctx->m.uvlinesize*8;
710 ctx->frame.interlaced_frame = frame->interlaced_frame;
711 ctx->cur_field = frame->interlaced_frame && !frame->top_field_first;
714 static int dnxhd_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, const void *data)
716 DNXHDEncContext *ctx = avctx->priv_data;
720 if (buf_size < ctx->cid_table->frame_size) {
721 av_log(avctx, AV_LOG_ERROR, "output buffer is too small to compress picture\n");
725 dnxhd_load_picture(ctx, data);
728 for (i = 0; i < 3; i++) {
729 ctx->src[i] = ctx->frame.data[i];
730 if (ctx->interlaced && ctx->cur_field)
731 ctx->src[i] += ctx->frame.linesize[i];
734 dnxhd_write_header(avctx, buf);
736 if (avctx->mb_decision == FF_MB_DECISION_RD)
737 ret = dnxhd_encode_rdo(avctx, ctx);
739 ret = dnxhd_encode_fast(avctx, ctx);
741 av_log(avctx, AV_LOG_ERROR, "picture could not fit ratecontrol constraints\n");
745 dnxhd_setup_threads_slices(ctx, buf);
748 for (i = 0; i < ctx->m.mb_height; i++) {
749 AV_WB32(ctx->msip + i * 4, offset);
750 offset += ctx->slice_size[i];
751 assert(!(ctx->slice_size[i] & 3));
754 avctx->execute(avctx, dnxhd_encode_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count, sizeof(void*));
756 AV_WB32(buf + ctx->cid_table->coding_unit_size - 4, 0x600DC0DE); // EOF
758 if (ctx->interlaced && first_field) {
761 buf += ctx->cid_table->coding_unit_size;
762 buf_size -= ctx->cid_table->coding_unit_size;
763 goto encode_coding_unit;
766 ctx->frame.quality = ctx->qscale*FF_QP2LAMBDA;
768 return ctx->cid_table->frame_size;
771 static int dnxhd_encode_end(AVCodecContext *avctx)
773 DNXHDEncContext *ctx = avctx->priv_data;
774 int max_level = 1<<(ctx->cid_table->bit_depth+2);
777 av_free(ctx->vlc_codes-max_level*2);
778 av_free(ctx->vlc_bits -max_level*2);
779 av_freep(&ctx->run_codes);
780 av_freep(&ctx->run_bits);
782 av_freep(&ctx->mb_bits);
783 av_freep(&ctx->mb_qscale);
784 av_freep(&ctx->mb_rc);
785 av_freep(&ctx->mb_cmp);
786 av_freep(&ctx->slice_size);
788 av_freep(&ctx->qmatrix_c);
789 av_freep(&ctx->qmatrix_l);
790 av_freep(&ctx->qmatrix_c16);
791 av_freep(&ctx->qmatrix_l16);
793 for (i = 1; i < avctx->thread_count; i++)
794 av_freep(&ctx->thread[i]);
799 AVCodec dnxhd_encoder = {
803 sizeof(DNXHDEncContext),
805 dnxhd_encode_picture,
807 .pix_fmts = (enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_NONE},
808 .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),