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 Indices 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];
70 uint16_t *table_vlc_codes;
71 uint8_t *table_vlc_bits;
72 uint16_t *table_run_codes;
73 uint8_t *table_run_bits;
86 RCEntry (*mb_rc)[8160];
89 #define LAMBDA_FRAC_BITS 10
91 static int dnxhd_init_vlc(DNXHDEncContext *ctx)
95 CHECKED_ALLOCZ(ctx->table_vlc_codes, 449*2);
96 CHECKED_ALLOCZ(ctx->table_vlc_bits, 449);
97 CHECKED_ALLOCZ(ctx->table_run_codes, 63*2);
98 CHECKED_ALLOCZ(ctx->table_run_bits, 63);
100 for (i = 0; i < 257; i++) {
101 int level = ctx->cid_table->ac_level[i] +
102 (ctx->cid_table->ac_run_flag[i] << 7) + (ctx->cid_table->ac_index_flag[i] << 8);
104 if (ctx->cid_table->ac_level[i] == 64 && ctx->cid_table->ac_index_flag[i])
105 level -= 64; // use 0+(1<<8) level
106 ctx->table_vlc_codes[level] = ctx->cid_table->ac_codes[i];
107 ctx->table_vlc_bits [level] = ctx->cid_table->ac_bits[i];
109 for (i = 0; i < 62; i++) {
110 int run = ctx->cid_table->run[i];
112 ctx->table_run_codes[run] = ctx->cid_table->run_codes[i];
113 ctx->table_run_bits [run] = ctx->cid_table->run_bits[i];
120 static int dnxhd_init_qmat(DNXHDEncContext *ctx, int lbias, int cbias)
122 // init first elem to 1 to avoid div by 0 in convert_matrix
123 uint16_t weight_matrix[64] = {1,}; // convert_matrix needs uint16_t*
126 CHECKED_ALLOCZ(ctx->qmatrix_l, (ctx->m.avctx->qmax+1) * 64 * sizeof(int));
127 CHECKED_ALLOCZ(ctx->qmatrix_c, (ctx->m.avctx->qmax+1) * 64 * sizeof(int));
128 CHECKED_ALLOCZ(ctx->qmatrix_l16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));
129 CHECKED_ALLOCZ(ctx->qmatrix_c16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));
131 for (i = 1; i < 64; i++) {
132 int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
133 weight_matrix[j] = ctx->cid_table->luma_weight[i];
135 ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_l, ctx->qmatrix_l16, weight_matrix,
136 ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
137 for (i = 1; i < 64; i++) {
138 int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];
139 weight_matrix[j] = ctx->cid_table->chroma_weight[i];
141 ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_c, ctx->qmatrix_c16, weight_matrix,
142 ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);
143 for (qscale = 1; qscale <= ctx->m.avctx->qmax; qscale++) {
144 for (i = 0; i < 64; i++) {
145 ctx->qmatrix_l [qscale] [i] <<= 2; ctx->qmatrix_c [qscale] [i] <<= 2;
146 ctx->qmatrix_l16[qscale][0][i] <<= 2; ctx->qmatrix_l16[qscale][1][i] <<= 2;
147 ctx->qmatrix_c16[qscale][0][i] <<= 2; ctx->qmatrix_c16[qscale][1][i] <<= 2;
155 static int dnxhd_init_rc(DNXHDEncContext *ctx)
157 CHECKED_ALLOCZ(ctx->mb_rc, 8160*ctx->m.avctx->qmax*sizeof(RCEntry));
158 if (ctx->m.avctx->mb_decision != FF_MB_DECISION_RD)
159 CHECKED_ALLOCZ(ctx->mb_cmp, ctx->m.mb_num*sizeof(RCCMPEntry));
161 ctx->frame_bits = (ctx->cid_table->coding_unit_size - 640 - 4) * 8;
163 ctx->lambda = 2<<LAMBDA_FRAC_BITS; // qscale 2
169 static int dnxhd_encode_init(AVCodecContext *avctx)
171 DNXHDEncContext *ctx = avctx->priv_data;
174 ctx->cid = ff_dnxhd_find_cid(avctx);
175 if (!ctx->cid || avctx->pix_fmt != PIX_FMT_YUV422P) {
176 av_log(avctx, AV_LOG_ERROR, "video parameters incompatible with DNxHD\n");
179 av_log(avctx, AV_LOG_DEBUG, "cid %d\n", ctx->cid);
181 index = ff_dnxhd_get_cid_table(ctx->cid);
182 ctx->cid_table = &ff_dnxhd_cid_table[index];
184 ctx->m.avctx = avctx;
188 dsputil_init(&ctx->m.dsp, avctx);
189 ff_dct_common_init(&ctx->m);
190 if (!ctx->m.dct_quantize)
191 ctx->m.dct_quantize = dct_quantize_c;
193 ctx->m.mb_height = (avctx->height + 15) / 16;
194 ctx->m.mb_width = (avctx->width + 15) / 16;
196 if (avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
198 ctx->m.mb_height /= 2;
201 ctx->m.mb_num = ctx->m.mb_height * ctx->m.mb_width;
203 if (avctx->intra_quant_bias != FF_DEFAULT_QUANT_BIAS)
204 ctx->m.intra_quant_bias = avctx->intra_quant_bias;
205 if (dnxhd_init_qmat(ctx, ctx->m.intra_quant_bias, 0) < 0) // XXX tune lbias/cbias
208 if (dnxhd_init_vlc(ctx) < 0)
210 if (dnxhd_init_rc(ctx) < 0)
213 CHECKED_ALLOCZ(ctx->slice_size, ctx->m.mb_height*sizeof(uint32_t));
214 CHECKED_ALLOCZ(ctx->mb_bits, ctx->m.mb_num *sizeof(uint16_t));
215 CHECKED_ALLOCZ(ctx->mb_qscale, ctx->m.mb_num *sizeof(uint8_t));
217 ctx->frame.key_frame = 1;
218 ctx->frame.pict_type = FF_I_TYPE;
219 ctx->m.avctx->coded_frame = &ctx->frame;
221 if (avctx->thread_count > MAX_THREADS || (avctx->thread_count > ctx->m.mb_height)) {
222 av_log(avctx, AV_LOG_ERROR, "too many threads\n");
226 ctx->thread[0] = ctx;
227 for (i = 1; i < avctx->thread_count; i++) {
228 ctx->thread[i] = av_malloc(sizeof(DNXHDEncContext));
229 memcpy(ctx->thread[i], ctx, sizeof(DNXHDEncContext));
232 for (i = 0; i < avctx->thread_count; i++) {
233 ctx->thread[i]->m.start_mb_y = (ctx->m.mb_height*(i ) + avctx->thread_count/2) / avctx->thread_count;
234 ctx->thread[i]->m.end_mb_y = (ctx->m.mb_height*(i+1) + avctx->thread_count/2) / avctx->thread_count;
238 fail: //for CHECKED_ALLOCZ
242 static int dnxhd_write_header(AVCodecContext *avctx, uint8_t *buf)
244 DNXHDEncContext *ctx = avctx->priv_data;
245 const uint8_t header_prefix[5] = { 0x00,0x00,0x02,0x80,0x01 };
247 memcpy(buf, header_prefix, 5);
248 buf[5] = ctx->interlaced ? ctx->cur_field+2 : 0x01;
249 buf[6] = 0x80; // crc flag off
250 buf[7] = 0xa0; // reserved
251 AV_WB16(buf + 0x18, avctx->height); // ALPF
252 AV_WB16(buf + 0x1a, avctx->width); // SPL
253 AV_WB16(buf + 0x1d, avctx->height); // NAL
255 buf[0x21] = 0x38; // FIXME 8 bit per comp
256 buf[0x22] = 0x88 + (ctx->frame.interlaced_frame<<2);
257 AV_WB32(buf + 0x28, ctx->cid); // CID
258 buf[0x2c] = ctx->interlaced ? 0 : 0x80;
260 buf[0x5f] = 0x01; // UDL
262 buf[0x167] = 0x02; // reserved
263 AV_WB16(buf + 0x16a, ctx->m.mb_height * 4 + 4); // MSIPS
264 buf[0x16d] = ctx->m.mb_height; // Ns
265 buf[0x16f] = 0x10; // reserved
267 ctx->msip = buf + 0x170;
271 static av_always_inline void dnxhd_encode_dc(DNXHDEncContext *ctx, int diff)
275 nbits = av_log2_16bit(-2*diff);
278 nbits = av_log2_16bit(2*diff);
280 put_bits(&ctx->m.pb, ctx->cid_table->dc_bits[nbits] + nbits,
281 (ctx->cid_table->dc_codes[nbits]<<nbits) + (diff & ((1 << nbits) - 1)));
284 static av_always_inline void dnxhd_encode_block(DNXHDEncContext *ctx, DCTELEM *block, int last_index, int n)
286 int last_non_zero = 0;
290 dnxhd_encode_dc(ctx, block[0] - ctx->m.last_dc[n]);
291 ctx->m.last_dc[n] = block[0];
293 for (i = 1; i <= last_index; i++) {
294 j = ctx->m.intra_scantable.permutated[i];
297 int run_level = i - last_non_zero - 1;
299 MASK_ABS(sign, slevel);
301 offset = (slevel-1) >> 6;
302 slevel = 256 | (slevel & 63); // level 64 is treated as 0
306 put_bits(&ctx->m.pb, ctx->table_vlc_bits[slevel]+1, (ctx->table_vlc_codes[slevel]<<1)|(sign&1));
308 put_bits(&ctx->m.pb, 4, offset);
312 put_bits(&ctx->m.pb, ctx->table_run_bits[run_level], ctx->table_run_codes[run_level]);
316 put_bits(&ctx->m.pb, ctx->table_vlc_bits[0], ctx->table_vlc_codes[0]); // EOB
319 static av_always_inline void dnxhd_unquantize_c(DNXHDEncContext *ctx, DCTELEM *block, int n, int qscale, int last_index)
321 const uint8_t *weight_matrix;
325 weight_matrix = (n&2) ? ctx->cid_table->chroma_weight : ctx->cid_table->luma_weight;
327 for (i = 1; i <= last_index; i++) {
328 int j = ctx->m.intra_scantable.permutated[i];
332 level = (1-2*level) * qscale * weight_matrix[i];
333 if (weight_matrix[i] != 32)
338 level = (2*level+1) * qscale * weight_matrix[i];
339 if (weight_matrix[i] != 32)
348 static av_always_inline int dnxhd_ssd_block(DCTELEM *qblock, DCTELEM *block)
352 for (i = 0; i < 64; i++)
353 score += (block[i]-qblock[i])*(block[i]-qblock[i]);
357 static av_always_inline int dnxhd_calc_ac_bits(DNXHDEncContext *ctx, DCTELEM *block, int last_index)
359 int last_non_zero = 0;
362 for (i = 1; i <= last_index; i++) {
363 j = ctx->m.intra_scantable.permutated[i];
366 int run_level = i - last_non_zero - 1;
367 level = FFABS(level);
369 level = 256 | (level & 63); // level 64 is treated as 0
372 level |= (!!run_level)<<7;
373 bits += ctx->table_vlc_bits[level]+1 + ctx->table_run_bits[run_level];
380 static av_always_inline void dnxhd_get_pixels_4x8(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
383 for (i = 0; i < 4; i++) {
384 block[0] = pixels[0];
385 block[1] = pixels[1];
386 block[2] = pixels[2];
387 block[3] = pixels[3];
388 block[4] = pixels[4];
389 block[5] = pixels[5];
390 block[6] = pixels[6];
391 block[7] = pixels[7];
395 memcpy(block , block- 8, sizeof(*block)*8);
396 memcpy(block+ 8, block-16, sizeof(*block)*8);
397 memcpy(block+16, block-24, sizeof(*block)*8);
398 memcpy(block+24, block-32, sizeof(*block)*8);
401 static av_always_inline void dnxhd_get_blocks(DNXHDEncContext *ctx, int mb_x, int mb_y)
403 const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize) + (mb_x << 4);
404 const uint8_t *ptr_u = ctx->thread[0]->src[1] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
405 const uint8_t *ptr_v = ctx->thread[0]->src[2] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);
406 DSPContext *dsp = &ctx->m.dsp;
408 dsp->get_pixels(ctx->blocks[0], ptr_y , ctx->m.linesize);
409 dsp->get_pixels(ctx->blocks[1], ptr_y + 8, ctx->m.linesize);
410 dsp->get_pixels(ctx->blocks[2], ptr_u , ctx->m.uvlinesize);
411 dsp->get_pixels(ctx->blocks[3], ptr_v , ctx->m.uvlinesize);
413 if (mb_y+1 == ctx->m.mb_height && ctx->m.avctx->height == 1080) {
414 if (ctx->interlaced) {
415 dnxhd_get_pixels_4x8(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
416 dnxhd_get_pixels_4x8(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
417 dnxhd_get_pixels_4x8(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
418 dnxhd_get_pixels_4x8(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
420 memset(ctx->blocks[4], 0, 4*64*sizeof(DCTELEM));
422 dsp->get_pixels(ctx->blocks[4], ptr_y + ctx->dct_y_offset , ctx->m.linesize);
423 dsp->get_pixels(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);
424 dsp->get_pixels(ctx->blocks[6], ptr_u + ctx->dct_uv_offset , ctx->m.uvlinesize);
425 dsp->get_pixels(ctx->blocks[7], ptr_v + ctx->dct_uv_offset , ctx->m.uvlinesize);
429 static av_always_inline int dnxhd_switch_matrix(DNXHDEncContext *ctx, int i)
432 ctx->m.q_intra_matrix16 = ctx->qmatrix_c16;
433 ctx->m.q_intra_matrix = ctx->qmatrix_c;
436 ctx->m.q_intra_matrix16 = ctx->qmatrix_l16;
437 ctx->m.q_intra_matrix = ctx->qmatrix_l;
442 static int dnxhd_calc_bits_thread(AVCodecContext *avctx, void *arg)
444 DNXHDEncContext *ctx = arg;
446 int qscale = ctx->thread[0]->qscale;
448 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
451 ctx->m.last_dc[2] = 1024;
453 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
454 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
460 dnxhd_get_blocks(ctx, mb_x, mb_y);
462 for (i = 0; i < 8; i++) {
463 DECLARE_ALIGNED_16(DCTELEM, block[64]);
464 DCTELEM *src_block = ctx->blocks[i];
465 int overflow, nbits, diff, last_index;
466 int n = dnxhd_switch_matrix(ctx, i);
468 memcpy(block, src_block, sizeof(block));
469 last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);
470 ac_bits += dnxhd_calc_ac_bits(ctx, block, last_index);
472 diff = block[0] - ctx->m.last_dc[n];
473 if (diff < 0) nbits = av_log2_16bit(-2*diff);
474 else nbits = av_log2_16bit( 2*diff);
475 dc_bits += ctx->cid_table->dc_bits[nbits] + nbits;
477 ctx->m.last_dc[n] = block[0];
479 if (avctx->mb_decision == FF_MB_DECISION_RD || !RC_VARIANCE) {
480 dnxhd_unquantize_c(ctx, block, i, qscale, last_index);
481 ctx->m.dsp.idct(block);
482 ssd += dnxhd_ssd_block(block, src_block);
485 ctx->mb_rc[qscale][mb].ssd = ssd;
486 ctx->mb_rc[qscale][mb].bits = ac_bits+dc_bits+12+8*ctx->table_vlc_bits[0];
492 static int dnxhd_encode_thread(AVCodecContext *avctx, void *arg)
494 DNXHDEncContext *ctx = arg;
497 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
500 ctx->m.last_dc[2] = 1024;
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 int qscale = ctx->mb_qscale[mb];
506 put_bits(&ctx->m.pb, 12, qscale<<1);
508 dnxhd_get_blocks(ctx, mb_x, mb_y);
510 for (i = 0; i < 8; i++) {
511 DCTELEM *block = ctx->blocks[i];
512 int last_index, overflow;
513 int n = dnxhd_switch_matrix(ctx, i);
514 last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);
515 dnxhd_encode_block(ctx, block, last_index, n);
518 if (put_bits_count(&ctx->m.pb)&31)
519 put_bits(&ctx->m.pb, 32-(put_bits_count(&ctx->m.pb)&31), 0);
521 flush_put_bits(&ctx->m.pb);
525 static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx, uint8_t *buf)
529 for (i = 0; i < ctx->m.avctx->thread_count; i++) {
531 for (mb_y = ctx->thread[i]->m.start_mb_y; mb_y < ctx->thread[i]->m.end_mb_y; mb_y++) {
532 ctx->slice_size[mb_y] = 0;
533 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
534 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
535 ctx->slice_size[mb_y] += ctx->mb_bits[mb];
537 ctx->slice_size[mb_y] = (ctx->slice_size[mb_y]+31)&~31;
538 ctx->slice_size[mb_y] >>= 3;
539 thread_size += ctx->slice_size[mb_y];
541 init_put_bits(&ctx->thread[i]->m.pb, buf + 640 + offset, thread_size);
542 offset += thread_size;
546 static int dnxhd_mb_var_thread(AVCodecContext *avctx, void *arg)
548 DNXHDEncContext *ctx = arg;
550 for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {
551 for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {
552 unsigned mb = mb_y * ctx->m.mb_width + mb_x;
553 uint8_t *pix = ctx->thread[0]->src[0] + ((mb_y<<4) * ctx->m.linesize) + (mb_x<<4);
554 int sum = ctx->m.dsp.pix_sum(pix, ctx->m.linesize);
555 int varc = (ctx->m.dsp.pix_norm1(pix, ctx->m.linesize) - (((unsigned)(sum*sum))>>8)+128)>>8;
556 ctx->mb_cmp[mb].value = varc;
557 ctx->mb_cmp[mb].mb = mb;
563 static int dnxhd_encode_rdo(AVCodecContext *avctx, DNXHDEncContext *ctx)
565 int lambda, up_step, down_step;
566 int last_lower = INT_MAX, last_higher = 0;
569 for (q = 1; q < avctx->qmax; q++) {
571 avctx->execute(avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);
573 up_step = down_step = 2<<LAMBDA_FRAC_BITS;
574 lambda = ctx->lambda;
579 if (lambda == last_higher) {
581 end = 1; // need to set final qscales/bits
583 for (y = 0; y < ctx->m.mb_height; y++) {
584 for (x = 0; x < ctx->m.mb_width; x++) {
585 unsigned min = UINT_MAX;
587 int mb = y*ctx->m.mb_width+x;
588 for (q = 1; q < avctx->qmax; q++) {
589 unsigned score = ctx->mb_rc[q][mb].bits*lambda+(ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);
595 bits += ctx->mb_rc[qscale][mb].bits;
596 ctx->mb_qscale[mb] = qscale;
597 ctx->mb_bits[mb] = ctx->mb_rc[qscale][mb].bits;
599 bits = (bits+31)&~31; // padding
600 if (bits > ctx->frame_bits)
603 //dprintf(ctx->m.avctx, "lambda %d, up %u, down %u, bits %d, frame %d\n",
604 // lambda, last_higher, last_lower, bits, ctx->frame_bits);
606 if (bits > ctx->frame_bits)
610 if (bits < ctx->frame_bits) {
611 last_lower = FFMIN(lambda, last_lower);
612 if (last_higher != 0)
613 lambda = (lambda+last_higher)>>1;
616 down_step *= 5; // XXX tune ?
617 up_step = 1<<LAMBDA_FRAC_BITS;
618 lambda = FFMAX(1, lambda);
619 if (lambda == last_lower)
622 last_higher = FFMAX(lambda, last_higher);
623 if (last_lower != INT_MAX)
624 lambda = (lambda+last_lower)>>1;
628 down_step = 1<<LAMBDA_FRAC_BITS;
631 //dprintf(ctx->m.avctx, "out lambda %d\n", lambda);
632 ctx->lambda = lambda;
636 static int dnxhd_find_qscale(DNXHDEncContext *ctx)
642 int last_lower = INT_MAX;
646 qscale = ctx->qscale;
649 ctx->qscale = qscale;
650 // XXX avoid recalculating bits
651 ctx->m.avctx->execute(ctx->m.avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, ctx->m.avctx->thread_count);
652 for (y = 0; y < ctx->m.mb_height; y++) {
653 for (x = 0; x < ctx->m.mb_width; x++)
654 bits += ctx->mb_rc[qscale][y*ctx->m.mb_width+x].bits;
655 bits = (bits+31)&~31; // padding
656 if (bits > ctx->frame_bits)
659 //dprintf(ctx->m.avctx, "%d, qscale %d, bits %d, frame %d, higher %d, lower %d\n",
660 // ctx->m.avctx->frame_number, qscale, bits, ctx->frame_bits, last_higher, last_lower);
661 if (bits < ctx->frame_bits) {
664 if (last_higher == qscale - 1) {
665 qscale = last_higher;
668 last_lower = FFMIN(qscale, last_lower);
669 if (last_higher != 0)
670 qscale = (qscale+last_higher)>>1;
672 qscale -= down_step++;
677 if (last_lower == qscale + 1)
679 last_higher = FFMAX(qscale, last_higher);
680 if (last_lower != INT_MAX)
681 qscale = (qscale+last_lower)>>1;
685 if (qscale >= ctx->m.avctx->qmax)
689 //dprintf(ctx->m.avctx, "out qscale %d\n", qscale);
690 ctx->qscale = qscale;
694 static int dnxhd_rc_cmp(const void *a, const void *b)
696 return ((const RCCMPEntry *)b)->value - ((const RCCMPEntry *)a)->value;
699 static int dnxhd_encode_fast(AVCodecContext *avctx, DNXHDEncContext *ctx)
703 if ((ret = dnxhd_find_qscale(ctx)) < 0)
705 for (y = 0; y < ctx->m.mb_height; y++) {
706 for (x = 0; x < ctx->m.mb_width; x++) {
707 int mb = y*ctx->m.mb_width+x;
709 ctx->mb_qscale[mb] = ctx->qscale;
710 ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale][mb].bits;
711 max_bits += ctx->mb_rc[ctx->qscale][mb].bits;
713 delta_bits = ctx->mb_rc[ctx->qscale][mb].bits-ctx->mb_rc[ctx->qscale+1][mb].bits;
714 ctx->mb_cmp[mb].mb = mb;
715 ctx->mb_cmp[mb].value = delta_bits ?
716 ((ctx->mb_rc[ctx->qscale][mb].ssd-ctx->mb_rc[ctx->qscale+1][mb].ssd)*100)/delta_bits
717 : INT_MIN; //avoid increasing qscale
720 max_bits += 31; //worst padding
724 avctx->execute(avctx, dnxhd_mb_var_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);
725 qsort(ctx->mb_cmp, ctx->m.mb_num, sizeof(RCEntry), dnxhd_rc_cmp);
726 for (x = 0; x < ctx->m.mb_num && max_bits > ctx->frame_bits; x++) {
727 int mb = ctx->mb_cmp[x].mb;
728 max_bits -= ctx->mb_rc[ctx->qscale][mb].bits - ctx->mb_rc[ctx->qscale+1][mb].bits;
729 ctx->mb_qscale[mb] = ctx->qscale+1;
730 ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale+1][mb].bits;
736 static void dnxhd_load_picture(DNXHDEncContext *ctx, const AVFrame *frame)
740 for (i = 0; i < 3; i++) {
741 ctx->frame.data[i] = frame->data[i];
742 ctx->frame.linesize[i] = frame->linesize[i];
745 for (i = 0; i < ctx->m.avctx->thread_count; i++) {
746 ctx->thread[i]->m.linesize = ctx->frame.linesize[0]<<ctx->interlaced;
747 ctx->thread[i]->m.uvlinesize = ctx->frame.linesize[1]<<ctx->interlaced;
748 ctx->thread[i]->dct_y_offset = ctx->m.linesize *8;
749 ctx->thread[i]->dct_uv_offset = ctx->m.uvlinesize*8;
752 ctx->frame.interlaced_frame = frame->interlaced_frame;
753 ctx->cur_field = frame->interlaced_frame && !frame->top_field_first;
756 static int dnxhd_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, const void *data)
758 DNXHDEncContext *ctx = avctx->priv_data;
762 if (buf_size < ctx->cid_table->frame_size) {
763 av_log(avctx, AV_LOG_ERROR, "output buffer is too small to compress picture\n");
767 dnxhd_load_picture(ctx, data);
770 for (i = 0; i < 3; i++) {
771 ctx->src[i] = ctx->frame.data[i];
772 if (ctx->interlaced && ctx->cur_field)
773 ctx->src[i] += ctx->frame.linesize[i];
776 dnxhd_write_header(avctx, buf);
778 if (avctx->mb_decision == FF_MB_DECISION_RD)
779 ret = dnxhd_encode_rdo(avctx, ctx);
781 ret = dnxhd_encode_fast(avctx, ctx);
783 av_log(avctx, AV_LOG_ERROR, "picture could not fit ratecontrol constraints\n");
787 dnxhd_setup_threads_slices(ctx, buf);
790 for (i = 0; i < ctx->m.mb_height; i++) {
791 AV_WB32(ctx->msip + i * 4, offset);
792 offset += ctx->slice_size[i];
793 assert(!(ctx->slice_size[i] & 3));
796 avctx->execute(avctx, dnxhd_encode_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);
798 AV_WB32(buf + ctx->cid_table->coding_unit_size - 4, 0x600DC0DE); // EOF
800 if (ctx->interlaced && first_field) {
803 buf += ctx->cid_table->coding_unit_size;
804 buf_size -= ctx->cid_table->coding_unit_size;
805 goto encode_coding_unit;
808 return ctx->cid_table->frame_size;
811 static int dnxhd_encode_end(AVCodecContext *avctx)
813 DNXHDEncContext *ctx = avctx->priv_data;
816 av_freep(&ctx->table_vlc_codes);
817 av_freep(&ctx->table_vlc_bits);
818 av_freep(&ctx->table_run_codes);
819 av_freep(&ctx->table_run_bits);
821 av_freep(&ctx->mb_bits);
822 av_freep(&ctx->mb_qscale);
823 av_freep(&ctx->mb_rc);
824 av_freep(&ctx->mb_cmp);
825 av_freep(&ctx->slice_size);
827 av_freep(&ctx->qmatrix_c);
828 av_freep(&ctx->qmatrix_l);
829 av_freep(&ctx->qmatrix_c16);
830 av_freep(&ctx->qmatrix_l16);
832 for (i = 1; i < avctx->thread_count; i++)
833 av_freep(&ctx->thread[i]);
838 AVCodec dnxhd_encoder = {
842 sizeof(DNXHDEncContext),
844 dnxhd_encode_picture,
846 .pix_fmts = (enum PixelFormat[]){PIX_FMT_YUV422P, -1},