| 431 | } |
| 432 | |
| 433 | static double modify_qscale(MpegEncContext *s, RateControlEntry *rce, double q, int frame_num){ |
| 434 | RateControlContext *rcc= &s->rc_context; |
| 435 | int qmin, qmax; |
| 436 | const int pict_type= rce->new_pict_type; |
| 437 | const double buffer_size= s->avctx->rc_buffer_size; |
| 438 | const double fps= 1/av_q2d(s->avctx->time_base); |
| 439 | const double min_rate= s->avctx->rc_min_rate / fps; |
| 440 | const double max_rate= s->avctx->rc_max_rate / fps; |
| 441 | |
| 442 | get_qminmax(&qmin, &qmax, s, pict_type); |
| 443 | |
| 444 | /* modulation */ |
| 445 | if(s->avctx->rc_qmod_freq && frame_num%s->avctx->rc_qmod_freq==0 && pict_type==FF_P_TYPE) |
| 446 | q*= s->avctx->rc_qmod_amp; |
| 447 | |
| 448 | //printf("q:%f\n", q); |
| 449 | /* buffer overflow/underflow protection */ |
| 450 | if(buffer_size){ |
| 451 | double expected_size= rcc->buffer_index; |
| 452 | double q_limit; |
| 453 | |
| 454 | if(min_rate){ |
| 455 | double d= 2*(buffer_size - expected_size)/buffer_size; |
| 456 | if(d>1.0) d=1.0; |
| 457 | else if(d<0.0001) d=0.0001; |
| 458 | q*= pow(d, 1.0/s->avctx->rc_buffer_aggressivity); |
| 459 | |
| 460 | q_limit= bits2qp(rce, FFMAX((min_rate - buffer_size + rcc->buffer_index) * s->avctx->rc_min_vbv_overflow_use, 1)); |
| 461 | if(q > q_limit){ |
| 462 | if(s->avctx->debug&FF_DEBUG_RC){ |
| 463 | av_log(s->avctx, AV_LOG_DEBUG, "limiting QP %f -> %f\n", q, q_limit); |
| 464 | } |
| 465 | q= q_limit; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | if(max_rate){ |
| 470 | double d= 2*expected_size/buffer_size; |
| 471 | if(d>1.0) d=1.0; |
| 472 | else if(d<0.0001) d=0.0001; |
| 473 | q/= pow(d, 1.0/s->avctx->rc_buffer_aggressivity); |
| 474 | |
| 475 | q_limit= bits2qp(rce, FFMAX(rcc->buffer_index * s->avctx->rc_max_available_vbv_use, 1)); |
| 476 | if(q < q_limit){ |
| 477 | if(s->avctx->debug&FF_DEBUG_RC){ |
| 478 | av_log(s->avctx, AV_LOG_DEBUG, "limiting QP %f -> %f\n", q, q_limit); |
| 479 | } |
| 480 | q= q_limit; |
| 481 | } |
| 482 | } |
| 483 | } |
| 484 | //printf("q:%f max:%f min:%f size:%f index:%d bits:%f agr:%f\n", q,max_rate, min_rate, buffer_size, rcc->buffer_index, bits, s->avctx->rc_buffer_aggressivity); |
| 485 | if(s->avctx->rc_qsquish==0.0 || qmin==qmax){ |
| 486 | if (q<qmin) q=qmin; |
| 487 | else if(q>qmax) q=qmax; |
| 488 | }else{ |
| 489 | double min2= log(qmin); |
| 490 | double max2= log(qmax); |
no test coverage detected