25 |
* |
* |
26 |
****************************************************************************/ |
****************************************************************************/ |
27 |
|
|
28 |
#include <string.h> |
#include <stdio.h> |
29 |
#include <stdlib.h> |
#include <stdlib.h> |
30 |
|
#include <string.h> |
31 |
|
|
32 |
#include "../portab.h" |
#include "../portab.h" |
33 |
#include "mbfunctions.h" |
#include "mbfunctions.h" |
36 |
#include "mem_transfer.h" |
#include "mem_transfer.h" |
37 |
#include "timer.h" |
#include "timer.h" |
38 |
#include "../bitstream/mbcoding.h" |
#include "../bitstream/mbcoding.h" |
39 |
|
#include "../bitstream/zigzag.h" |
40 |
#include "../dct/fdct.h" |
#include "../dct/fdct.h" |
41 |
#include "../dct/idct.h" |
#include "../dct/idct.h" |
42 |
#include "../quant/quant_mpeg4.h" |
#include "../quant/quant_mpeg4.h" |
160 |
} |
} |
161 |
} |
} |
162 |
|
|
163 |
|
|
164 |
|
static int |
165 |
|
dct_quantize_trellis_h263_c(int16_t *const Out, |
166 |
|
const int16_t *const In, |
167 |
|
int Q, |
168 |
|
const uint16_t * const Zigzag, |
169 |
|
int Non_Zero); |
170 |
|
|
171 |
|
#if 0 |
172 |
|
static int |
173 |
|
dct_quantize_trellis_mpeg_c(int16_t *const Out, |
174 |
|
const int16_t *const In, |
175 |
|
int Q, |
176 |
|
const uint16_t * const Zigzag, |
177 |
|
int Non_Zero); |
178 |
|
#endif |
179 |
|
|
180 |
/* Quantize all blocks -- Inter mode */ |
/* Quantize all blocks -- Inter mode */ |
181 |
static __inline uint8_t |
static __inline uint8_t |
182 |
MBQuantInter(const MBParam * pParam, |
MBQuantInter(const MBParam * pParam, |
200 |
if (!(pParam->vol_flags & XVID_VOL_MPEGQUANT)) { |
if (!(pParam->vol_flags & XVID_VOL_MPEGQUANT)) { |
201 |
sum = quant_inter(&qcoeff[i*64], &data[i*64], pMB->quant); |
sum = quant_inter(&qcoeff[i*64], &data[i*64], pMB->quant); |
202 |
if ( (sum) && (frame->vop_flags & XVID_VOP_TRELLISQUANT) ) { |
if ( (sum) && (frame->vop_flags & XVID_VOP_TRELLISQUANT) ) { |
203 |
sum = dct_quantize_trellis_inter_h263_c (&qcoeff[i*64], &data[i*64], pMB->quant)+1; |
sum = dct_quantize_trellis_h263_c(&qcoeff[i*64], &data[i*64], pMB->quant, &scan_tables[0][0], 63)+1; |
204 |
limit = 1; |
limit = 1; |
205 |
} |
} |
206 |
} else { |
} else { |
207 |
sum = quant4_inter(&qcoeff[i * 64], &data[i * 64], pMB->quant); |
sum = quant4_inter(&qcoeff[i * 64], &data[i * 64], pMB->quant); |
208 |
// if ( (sum) && (frame->vop_flags & XVID_VOP_TRELLISQUANT) ) |
#if 0 |
209 |
// sum = dct_quantize_trellis_inter_mpeg_c (&qcoeff[i*64], &data[i*64], pMB->quant)+1; |
if ( (sum) && (frame->vop_flags & XVID_VOP_TRELLISQUANT) ) |
210 |
|
sum = dct_quantize_trellis_mpeg_c (&qcoeff[i*64], &data[i*64], pMB->quant)+1; |
211 |
|
#endif |
212 |
} |
} |
213 |
stop_quant_timer(); |
stop_quant_timer(); |
214 |
|
|
557 |
|
|
558 |
/* left blocks */ |
/* left blocks */ |
559 |
|
|
560 |
// 1=2, 2=4, 4=8, 8=1 |
/* 1=2, 2=4, 4=8, 8=1 */ |
561 |
MOVLINE(tmp, LINE(0, 1)); |
MOVLINE(tmp, LINE(0, 1)); |
562 |
MOVLINE(LINE(0, 1), LINE(0, 2)); |
MOVLINE(LINE(0, 1), LINE(0, 2)); |
563 |
MOVLINE(LINE(0, 2), LINE(0, 4)); |
MOVLINE(LINE(0, 2), LINE(0, 4)); |
564 |
MOVLINE(LINE(0, 4), LINE(2, 0)); |
MOVLINE(LINE(0, 4), LINE(2, 0)); |
565 |
MOVLINE(LINE(2, 0), tmp); |
MOVLINE(LINE(2, 0), tmp); |
566 |
|
|
567 |
// 3=6, 6=12, 12=9, 9=3 |
/* 3=6, 6=12, 12=9, 9=3 */ |
568 |
MOVLINE(tmp, LINE(0, 3)); |
MOVLINE(tmp, LINE(0, 3)); |
569 |
MOVLINE(LINE(0, 3), LINE(0, 6)); |
MOVLINE(LINE(0, 3), LINE(0, 6)); |
570 |
MOVLINE(LINE(0, 6), LINE(2, 4)); |
MOVLINE(LINE(0, 6), LINE(2, 4)); |
571 |
MOVLINE(LINE(2, 4), LINE(2, 1)); |
MOVLINE(LINE(2, 4), LINE(2, 1)); |
572 |
MOVLINE(LINE(2, 1), tmp); |
MOVLINE(LINE(2, 1), tmp); |
573 |
|
|
574 |
// 5=10, 10=5 |
/* 5=10, 10=5 */ |
575 |
MOVLINE(tmp, LINE(0, 5)); |
MOVLINE(tmp, LINE(0, 5)); |
576 |
MOVLINE(LINE(0, 5), LINE(2, 2)); |
MOVLINE(LINE(0, 5), LINE(2, 2)); |
577 |
MOVLINE(LINE(2, 2), tmp); |
MOVLINE(LINE(2, 2), tmp); |
578 |
|
|
579 |
// 7=14, 14=13, 13=11, 11=7 |
/* 7=14, 14=13, 13=11, 11=7 */ |
580 |
MOVLINE(tmp, LINE(0, 7)); |
MOVLINE(tmp, LINE(0, 7)); |
581 |
MOVLINE(LINE(0, 7), LINE(2, 6)); |
MOVLINE(LINE(0, 7), LINE(2, 6)); |
582 |
MOVLINE(LINE(2, 6), LINE(2, 5)); |
MOVLINE(LINE(2, 6), LINE(2, 5)); |
585 |
|
|
586 |
/* right blocks */ |
/* right blocks */ |
587 |
|
|
588 |
// 1=2, 2=4, 4=8, 8=1 |
/* 1=2, 2=4, 4=8, 8=1 */ |
589 |
MOVLINE(tmp, LINE(1, 1)); |
MOVLINE(tmp, LINE(1, 1)); |
590 |
MOVLINE(LINE(1, 1), LINE(1, 2)); |
MOVLINE(LINE(1, 1), LINE(1, 2)); |
591 |
MOVLINE(LINE(1, 2), LINE(1, 4)); |
MOVLINE(LINE(1, 2), LINE(1, 4)); |
592 |
MOVLINE(LINE(1, 4), LINE(3, 0)); |
MOVLINE(LINE(1, 4), LINE(3, 0)); |
593 |
MOVLINE(LINE(3, 0), tmp); |
MOVLINE(LINE(3, 0), tmp); |
594 |
|
|
595 |
// 3=6, 6=12, 12=9, 9=3 |
/* 3=6, 6=12, 12=9, 9=3 */ |
596 |
MOVLINE(tmp, LINE(1, 3)); |
MOVLINE(tmp, LINE(1, 3)); |
597 |
MOVLINE(LINE(1, 3), LINE(1, 6)); |
MOVLINE(LINE(1, 3), LINE(1, 6)); |
598 |
MOVLINE(LINE(1, 6), LINE(3, 4)); |
MOVLINE(LINE(1, 6), LINE(3, 4)); |
599 |
MOVLINE(LINE(3, 4), LINE(3, 1)); |
MOVLINE(LINE(3, 4), LINE(3, 1)); |
600 |
MOVLINE(LINE(3, 1), tmp); |
MOVLINE(LINE(3, 1), tmp); |
601 |
|
|
602 |
// 5=10, 10=5 |
/* 5=10, 10=5 */ |
603 |
MOVLINE(tmp, LINE(1, 5)); |
MOVLINE(tmp, LINE(1, 5)); |
604 |
MOVLINE(LINE(1, 5), LINE(3, 2)); |
MOVLINE(LINE(1, 5), LINE(3, 2)); |
605 |
MOVLINE(LINE(3, 2), tmp); |
MOVLINE(LINE(3, 2), tmp); |
606 |
|
|
607 |
// 7=14, 14=13, 13=11, 11=7 |
/* 7=14, 14=13, 13=11, 11=7 */ |
608 |
MOVLINE(tmp, LINE(1, 7)); |
MOVLINE(tmp, LINE(1, 7)); |
609 |
MOVLINE(LINE(1, 7), LINE(3, 6)); |
MOVLINE(LINE(1, 7), LINE(3, 6)); |
610 |
MOVLINE(LINE(3, 6), LINE(3, 5)); |
MOVLINE(LINE(3, 6), LINE(3, 5)); |
611 |
MOVLINE(LINE(3, 5), LINE(3, 3)); |
MOVLINE(LINE(3, 5), LINE(3, 3)); |
612 |
MOVLINE(LINE(3, 3), tmp); |
MOVLINE(LINE(3, 3), tmp); |
613 |
} |
} |
614 |
|
|
615 |
|
|
616 |
|
|
617 |
|
|
618 |
|
|
619 |
|
/***************************************************************************** |
620 |
|
* Trellis based R-D optimal quantization |
621 |
|
* |
622 |
|
* Trellis Quant code (C) 2003 Pascal Massimino skal(at)planet-d.net |
623 |
|
* |
624 |
|
****************************************************************************/ |
625 |
|
|
626 |
|
|
627 |
|
#if 0 |
628 |
|
static int |
629 |
|
dct_quantize_trellis_mpeg_c(int16_t *const Out, |
630 |
|
const int16_t *const In, |
631 |
|
int Q, |
632 |
|
const uint16_t * const Zigzag, |
633 |
|
int Non_Zero) |
634 |
|
{ |
635 |
|
return 63; |
636 |
|
} |
637 |
|
#endif |
638 |
|
|
639 |
|
/*---------------------------------------------------------------------------- |
640 |
|
* |
641 |
|
* Trellis-Based quantization |
642 |
|
* |
643 |
|
* So far I understand this paper: |
644 |
|
* |
645 |
|
* "Trellis-Based R-D Optimal Quantization in H.263+" |
646 |
|
* J.Wen, M.Luttrell, J.Villasenor |
647 |
|
* IEEE Transactions on Image Processing, Vol.9, No.8, Aug. 2000. |
648 |
|
* |
649 |
|
* we are at stake with a simplified Bellmand-Ford / Dijkstra Single |
650 |
|
* Source Shorted Path algo. But due to the underlying graph structure |
651 |
|
* ("Trellis"), it can be turned into a dynamic programming algo, |
652 |
|
* partially saving the explicit graph's nodes representation. And |
653 |
|
* without using a heap, since the open frontier of the DAG is always |
654 |
|
* known, and of fixed sized. |
655 |
|
*--------------------------------------------------------------------------*/ |
656 |
|
|
657 |
|
|
658 |
|
|
659 |
|
/* Codes lengths for relevant levels. */ |
660 |
|
|
661 |
|
/* let's factorize: */ |
662 |
|
static const uint8_t Code_Len0[64] = { |
663 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
664 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
665 |
|
static const uint8_t Code_Len1[64] = { |
666 |
|
20,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
667 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
668 |
|
static const uint8_t Code_Len2[64] = { |
669 |
|
19,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
670 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
671 |
|
static const uint8_t Code_Len3[64] = { |
672 |
|
18,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
673 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
674 |
|
static const uint8_t Code_Len4[64] = { |
675 |
|
17,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
676 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
677 |
|
static const uint8_t Code_Len5[64] = { |
678 |
|
16,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
679 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
680 |
|
static const uint8_t Code_Len6[64] = { |
681 |
|
15,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
682 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
683 |
|
static const uint8_t Code_Len7[64] = { |
684 |
|
13,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
685 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
686 |
|
static const uint8_t Code_Len8[64] = { |
687 |
|
11,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
688 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
689 |
|
static const uint8_t Code_Len9[64] = { |
690 |
|
12,21,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
691 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
692 |
|
static const uint8_t Code_Len10[64] = { |
693 |
|
12,20,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
694 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
695 |
|
static const uint8_t Code_Len11[64] = { |
696 |
|
12,19,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
697 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
698 |
|
static const uint8_t Code_Len12[64] = { |
699 |
|
11,17,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
700 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
701 |
|
static const uint8_t Code_Len13[64] = { |
702 |
|
11,15,21,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
703 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
704 |
|
static const uint8_t Code_Len14[64] = { |
705 |
|
10,12,19,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
706 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
707 |
|
static const uint8_t Code_Len15[64] = { |
708 |
|
10,13,17,19,21,21,21,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
709 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
710 |
|
static const uint8_t Code_Len16[64] = { |
711 |
|
9,12,13,18,18,19,19,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
712 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30}; |
713 |
|
static const uint8_t Code_Len17[64] = { |
714 |
|
8,11,13,14,14,14,15,19,19,19,21,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
715 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
716 |
|
static const uint8_t Code_Len18[64] = { |
717 |
|
7, 9,11,11,13,13,13,15,15,15,16,22,22,22,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
718 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
719 |
|
static const uint8_t Code_Len19[64] = { |
720 |
|
5, 7, 9,10,10,11,11,11,11,11,13,14,16,17,17,18,18,18,18,18,18,18,18,20,20,21,21,30,30,30,30,30, |
721 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30 }; |
722 |
|
static const uint8_t Code_Len20[64] = { |
723 |
|
3, 4, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9,10,10,10,10,10,10,10,10,12,12,13,13,12,13,14,15,15, |
724 |
|
15,16,16,16,16,17,17,17,18,18,19,19,19,19,19,19,19,19,21,21,22,22,30,30,30,30,30,30,30,30,30,30 }; |
725 |
|
|
726 |
|
/* a few more table for LAST table: */ |
727 |
|
static const uint8_t Code_Len21[64] = { |
728 |
|
13,20,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
729 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30}; |
730 |
|
static const uint8_t Code_Len22[64] = { |
731 |
|
12,15,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30, |
732 |
|
30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30}; |
733 |
|
static const uint8_t Code_Len23[64] = { |
734 |
|
10,12,15,15,15,16,16,16,16,17,17,17,17,17,17,17,17,18,18,18,18,18,18,18,18,19,19,19,19,20,20,20, |
735 |
|
20,21,21,21,21,21,21,21,21,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30}; |
736 |
|
static const uint8_t Code_Len24[64] = { |
737 |
|
5, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9,10,10,10,10,10,10,10,10,11,11,11,11,12,12,12, |
738 |
|
12,13,13,13,13,13,13,13,13,14,16,16,16,16,17,17,17,17,18,18,18,18,18,18,18,18,19,19,19,19,19,19}; |
739 |
|
|
740 |
|
|
741 |
|
static const uint8_t * const B16_17_Code_Len[24] = { /* levels [1..24] */ |
742 |
|
Code_Len20,Code_Len19,Code_Len18,Code_Len17, |
743 |
|
Code_Len16,Code_Len15,Code_Len14,Code_Len13, |
744 |
|
Code_Len12,Code_Len11,Code_Len10,Code_Len9, |
745 |
|
Code_Len8, Code_Len7 ,Code_Len6 ,Code_Len5, |
746 |
|
Code_Len4, Code_Len3, Code_Len3 ,Code_Len2, |
747 |
|
Code_Len2, Code_Len1, Code_Len1, Code_Len1, |
748 |
|
}; |
749 |
|
|
750 |
|
static const uint8_t * const B16_17_Code_Len_Last[6] = { /* levels [1..6] */ |
751 |
|
Code_Len24,Code_Len23,Code_Len22,Code_Len21, Code_Len3, Code_Len1, |
752 |
|
}; |
753 |
|
|
754 |
|
#define TL(q) 0xfe00/(q*q) |
755 |
|
|
756 |
|
static const int Trellis_Lambda_Tabs[31] = { |
757 |
|
TL( 1),TL( 2),TL( 3),TL( 4),TL( 5),TL( 6), TL( 7), |
758 |
|
TL( 8),TL( 9),TL(10),TL(11),TL(12),TL(13),TL(14), TL(15), |
759 |
|
TL(16),TL(17),TL(18),TL(19),TL(20),TL(21),TL(22), TL(23), |
760 |
|
TL(24),TL(25),TL(26),TL(27),TL(28),TL(29),TL(30), TL(31) |
761 |
|
}; |
762 |
|
#undef TL |
763 |
|
|
764 |
|
static __inline int Find_Last(const int16_t *C, const uint16_t *Zigzag, int i) |
765 |
|
{ |
766 |
|
while(i>=0) |
767 |
|
if (C[Zigzag[i]]) |
768 |
|
return i; |
769 |
|
else i--; |
770 |
|
return -1; |
771 |
|
} |
772 |
|
|
773 |
|
/* this routine has been strippen of all debug code */ |
774 |
|
|
775 |
|
static int |
776 |
|
dct_quantize_trellis_h263_c(int16_t *const Out, const int16_t *const In, int Q, const uint16_t * const Zigzag, int Non_Zero) |
777 |
|
{ |
778 |
|
|
779 |
|
/* |
780 |
|
* Note: We should search last non-zero coeffs on *real* DCT input coeffs (In[]), |
781 |
|
* not quantized one (Out[]). However, it only improves the result *very* |
782 |
|
* slightly (~0.01dB), whereas speed drops to crawling level :) |
783 |
|
* Well, actually, taking 1 more coeff past Non_Zero into account sometimes helps. |
784 |
|
*/ |
785 |
|
typedef struct { int16_t Run, Level; } NODE; |
786 |
|
|
787 |
|
NODE Nodes[65], Last; |
788 |
|
uint32_t Run_Costs0[64+1]; |
789 |
|
uint32_t * const Run_Costs = Run_Costs0 + 1; |
790 |
|
const int Mult = 2*Q; |
791 |
|
const int Bias = (Q-1) | 1; |
792 |
|
const int Lev0 = Mult + Bias; |
793 |
|
const int Lambda = Trellis_Lambda_Tabs[Q-1]; /* it's 1/lambda, actually */ |
794 |
|
|
795 |
|
int Run_Start = -1; |
796 |
|
uint32_t Min_Cost = 2<<16; |
797 |
|
|
798 |
|
int Last_Node = -1; |
799 |
|
uint32_t Last_Cost = 0; |
800 |
|
|
801 |
|
int i, j; |
802 |
|
Run_Costs[-1] = 2<<16; /* source (w/ CBP penalty) */ |
803 |
|
|
804 |
|
Non_Zero = Find_Last(Out, Zigzag, Non_Zero); |
805 |
|
if (Non_Zero<0) |
806 |
|
return -1; |
807 |
|
|
808 |
|
for(i=0; i<=Non_Zero; i++) |
809 |
|
{ |
810 |
|
const int AC = In[Zigzag[i]]; |
811 |
|
const int Level1 = Out[Zigzag[i]]; |
812 |
|
const int Dist0 = Lambda* AC*AC; |
813 |
|
uint32_t Best_Cost = 0xf0000000; |
814 |
|
Last_Cost += Dist0; |
815 |
|
|
816 |
|
if ((uint32_t)(Level1+1)<3) /* very specialized loop for -1,0,+1 */ |
817 |
|
{ |
818 |
|
int dQ; |
819 |
|
int Run; |
820 |
|
uint32_t Cost0; |
821 |
|
|
822 |
|
if (AC<0) { |
823 |
|
Nodes[i].Level = -1; |
824 |
|
dQ = Lev0 + AC; |
825 |
|
} else { |
826 |
|
Nodes[i].Level = 1; |
827 |
|
dQ = Lev0 - AC; |
828 |
|
} |
829 |
|
Cost0 = Lambda*dQ*dQ; |
830 |
|
|
831 |
|
Nodes[i].Run = 1; |
832 |
|
Best_Cost = (Code_Len20[0]<<16) + Run_Costs[i-1]+Cost0; |
833 |
|
for(Run=i-Run_Start; Run>0; --Run) |
834 |
|
{ |
835 |
|
const uint32_t Cost_Base = Cost0 + Run_Costs[i-Run]; |
836 |
|
const uint32_t Cost = Cost_Base + (Code_Len20[Run-1]<<16); |
837 |
|
const uint32_t lCost = Cost_Base + (Code_Len24[Run-1]<<16); |
838 |
|
|
839 |
|
/* |
840 |
|
* TODO: what about tie-breaks? Should we favor short runs or |
841 |
|
* long runs? Although the error is the same, it would not be |
842 |
|
* spread the same way along high and low frequencies... |
843 |
|
*/ |
844 |
|
|
845 |
|
/* (I'd say: favour short runs => hifreq errors (HVS) -- gruel ) */ |
846 |
|
|
847 |
|
if (Cost<Best_Cost) { |
848 |
|
Best_Cost = Cost; |
849 |
|
Nodes[i].Run = Run; |
850 |
|
} |
851 |
|
|
852 |
|
if (lCost<Last_Cost) { |
853 |
|
Last_Cost = lCost; |
854 |
|
Last.Run = Run; |
855 |
|
Last_Node = i; |
856 |
|
} |
857 |
|
} |
858 |
|
if (Last_Node==i) |
859 |
|
Last.Level = Nodes[i].Level; |
860 |
|
} |
861 |
|
else /* "big" levels */ |
862 |
|
{ |
863 |
|
const uint8_t *Tbl_L1, *Tbl_L2, *Tbl_L1_Last, *Tbl_L2_Last; |
864 |
|
int Level2; |
865 |
|
int dQ1, dQ2; |
866 |
|
int Run; |
867 |
|
uint32_t Dist1,Dist2; |
868 |
|
int dDist21; |
869 |
|
|
870 |
|
if (Level1>1) { |
871 |
|
dQ1 = Level1*Mult-AC + Bias; |
872 |
|
dQ2 = dQ1 - Mult; |
873 |
|
Level2 = Level1-1; |
874 |
|
Tbl_L1 = (Level1<=24) ? B16_17_Code_Len[Level1-1] : Code_Len0; |
875 |
|
Tbl_L2 = (Level2<=24) ? B16_17_Code_Len[Level2-1] : Code_Len0; |
876 |
|
Tbl_L1_Last = (Level1<=6) ? B16_17_Code_Len_Last[Level1-1] : Code_Len0; |
877 |
|
Tbl_L2_Last = (Level2<=6) ? B16_17_Code_Len_Last[Level2-1] : Code_Len0; |
878 |
|
} else { /* Level1<-1 */ |
879 |
|
dQ1 = Level1*Mult-AC - Bias; |
880 |
|
dQ2 = dQ1 + Mult; |
881 |
|
Level2 = Level1 + 1; |
882 |
|
Tbl_L1 = (Level1>=-24) ? B16_17_Code_Len[Level1^-1] : Code_Len0; |
883 |
|
Tbl_L2 = (Level2>=-24) ? B16_17_Code_Len[Level2^-1] : Code_Len0; |
884 |
|
Tbl_L1_Last = (Level1>=- 6) ? B16_17_Code_Len_Last[Level1^-1] : Code_Len0; |
885 |
|
Tbl_L2_Last = (Level2>=- 6) ? B16_17_Code_Len_Last[Level2^-1] : Code_Len0; |
886 |
|
} |
887 |
|
Dist1 = Lambda*dQ1*dQ1; |
888 |
|
Dist2 = Lambda*dQ2*dQ2; |
889 |
|
dDist21 = Dist2-Dist1; |
890 |
|
|
891 |
|
for(Run=i-Run_Start; Run>0; --Run) |
892 |
|
{ |
893 |
|
const uint32_t Cost_Base = Dist1 + Run_Costs[i-Run]; |
894 |
|
uint32_t Cost1, Cost2; |
895 |
|
int bLevel; |
896 |
|
|
897 |
|
/* |
898 |
|
* for sub-optimal (but slightly worth it, speed-wise) search, uncomment the following: |
899 |
|
* if (Cost_Base>=Best_Cost) continue; |
900 |
|
* (? doesn't seem to have any effect -- gruel ) |
901 |
|
*/ |
902 |
|
|
903 |
|
Cost1 = Cost_Base + (Tbl_L1[Run-1]<<16); |
904 |
|
Cost2 = Cost_Base + (Tbl_L2[Run-1]<<16) + dDist21; |
905 |
|
|
906 |
|
if (Cost2<Cost1) { |
907 |
|
Cost1 = Cost2; |
908 |
|
bLevel = Level2; |
909 |
|
} else |
910 |
|
bLevel = Level1; |
911 |
|
|
912 |
|
if (Cost1<Best_Cost) { |
913 |
|
Best_Cost = Cost1; |
914 |
|
Nodes[i].Run = Run; |
915 |
|
Nodes[i].Level = bLevel; |
916 |
|
} |
917 |
|
|
918 |
|
Cost1 = Cost_Base + (Tbl_L1_Last[Run-1]<<16); |
919 |
|
Cost2 = Cost_Base + (Tbl_L2_Last[Run-1]<<16) + dDist21; |
920 |
|
|
921 |
|
if (Cost2<Cost1) { |
922 |
|
Cost1 = Cost2; |
923 |
|
bLevel = Level2; |
924 |
|
} else |
925 |
|
bLevel = Level1; |
926 |
|
|
927 |
|
if (Cost1<Last_Cost) { |
928 |
|
Last_Cost = Cost1; |
929 |
|
Last.Run = Run; |
930 |
|
Last.Level = bLevel; |
931 |
|
Last_Node = i; |
932 |
|
} |
933 |
|
} /* end of "for Run" */ |
934 |
|
|
935 |
|
} |
936 |
|
|
937 |
|
Run_Costs[i] = Best_Cost; |
938 |
|
|
939 |
|
if (Best_Cost < Min_Cost + Dist0) { |
940 |
|
Min_Cost = Best_Cost; |
941 |
|
Run_Start = i; |
942 |
|
} |
943 |
|
else |
944 |
|
{ |
945 |
|
/* |
946 |
|
* as noticed by Michael Niedermayer (michaelni at gmx.at), there's |
947 |
|
* a code shorter by 1 bit for a larger run (!), same level. We give |
948 |
|
* it a chance by not moving the left barrier too much. |
949 |
|
*/ |
950 |
|
|
951 |
|
while( Run_Costs[Run_Start]>Min_Cost+(1<<16) ) |
952 |
|
Run_Start++; |
953 |
|
|
954 |
|
/* spread on preceding coeffs the cost incurred by skipping this one */ |
955 |
|
for(j=Run_Start; j<i; ++j) Run_Costs[j] += Dist0; |
956 |
|
Min_Cost += Dist0; |
957 |
|
} |
958 |
|
} |
959 |
|
|
960 |
|
if (Last_Node<0) |
961 |
|
return -1; |
962 |
|
|
963 |
|
/* reconstruct optimal sequence backward with surviving paths */ |
964 |
|
memset(Out, 0x00, 64*sizeof(*Out)); |
965 |
|
Out[Zigzag[Last_Node]] = Last.Level; |
966 |
|
i = Last_Node - Last.Run; |
967 |
|
while(i>=0) { |
968 |
|
Out[Zigzag[i]] = Nodes[i].Level; |
969 |
|
i -= Nodes[i].Run; |
970 |
|
} |
971 |
|
return Last_Node; |
972 |
|
} |
973 |
|
|
974 |
|
|
975 |
|
|
976 |
|
|
977 |
|
|
978 |
|
|
979 |
|
|
980 |
|
|
981 |
|
|
982 |
|
|
983 |
|
|
984 |
|
/* original version including heavy debugging info */ |
985 |
|
|
986 |
|
#ifdef DBGTRELL |
987 |
|
|
988 |
|
#define DBG 0 |
989 |
|
|
990 |
|
static __inline uint32_t Evaluate_Cost(const int16_t *C, int Mult, int Bias, |
991 |
|
const uint16_t * Zigzag, int Max, int Lambda) |
992 |
|
{ |
993 |
|
#if (DBG>0) |
994 |
|
const int16_t * const Ref = C + 6*64; |
995 |
|
int Last = Max; |
996 |
|
int Bits = 0; |
997 |
|
int Dist = 0; |
998 |
|
int i; |
999 |
|
uint32_t Cost; |
1000 |
|
|
1001 |
|
while(Last>=0 && C[Zigzag[Last]]==0) |
1002 |
|
Last--; |
1003 |
|
|
1004 |
|
if (Last>=0) { |
1005 |
|
int j=0, j0=0; |
1006 |
|
int Run, Level; |
1007 |
|
|
1008 |
|
Bits = 2; /* CBP */ |
1009 |
|
while(j<Last) { |
1010 |
|
while(!C[Zigzag[j]]) |
1011 |
|
j++; |
1012 |
|
if (j==Last) |
1013 |
|
break; |
1014 |
|
Level=C[Zigzag[j]]; |
1015 |
|
Run = j - j0; |
1016 |
|
j0 = ++j; |
1017 |
|
if (Level>=-24 && Level<=24) |
1018 |
|
Bits += B16_17_Code_Len[(Level<0) ? -Level-1 : Level-1][Run]; |
1019 |
|
else |
1020 |
|
Bits += 30; |
1021 |
|
} |
1022 |
|
Level = C[Zigzag[Last]]; |
1023 |
|
Run = j - j0; |
1024 |
|
if (Level>=-6 && Level<=6) |
1025 |
|
Bits += B16_17_Code_Len_Last[(Level<0) ? -Level-1 : Level-1][Run]; |
1026 |
|
else |
1027 |
|
Bits += 30; |
1028 |
|
} |
1029 |
|
|
1030 |
|
for(i=0; i<=Last; ++i) { |
1031 |
|
int V = C[Zigzag[i]]*Mult; |
1032 |
|
if (V>0) |
1033 |
|
V += Bias; |
1034 |
|
else |
1035 |
|
if (V<0) |
1036 |
|
V -= Bias; |
1037 |
|
V -= Ref[Zigzag[i]]; |
1038 |
|
Dist += V*V; |
1039 |
|
} |
1040 |
|
Cost = Lambda*Dist + (Bits<<16); |
1041 |
|
if (DBG==1) |
1042 |
|
printf( " Last:%2d/%2d Cost = [(Bits=%5.0d) + Lambda*(Dist=%6.0d) = %d ] >>12= %d ", Last,Max, Bits, Dist, Cost, Cost>>12 ); |
1043 |
|
return Cost; |
1044 |
|
|
1045 |
|
#else |
1046 |
|
return 0; |
1047 |
|
#endif |
1048 |
|
} |
1049 |
|
|
1050 |
|
|
1051 |
|
static int |
1052 |
|
dct_quantize_trellis_h263_c(int16_t *const Out, const int16_t *const In, int Q, const uint16_t * const Zigzag, int Non_Zero) |
1053 |
|
{ |
1054 |
|
|
1055 |
|
/* |
1056 |
|
* Note: We should search last non-zero coeffs on *real* DCT input coeffs (In[]), |
1057 |
|
* not quantized one (Out[]). However, it only improves the result *very* |
1058 |
|
* slightly (~0.01dB), whereas speed drops to crawling level :) |
1059 |
|
* Well, actually, taking 1 more coeff past Non_Zero into account sometimes helps. |
1060 |
|
*/ |
1061 |
|
typedef struct { int16_t Run, Level; } NODE; |
1062 |
|
|
1063 |
|
NODE Nodes[65], Last; |
1064 |
|
uint32_t Run_Costs0[64+1]; |
1065 |
|
uint32_t * const Run_Costs = Run_Costs0 + 1; |
1066 |
|
const int Mult = 2*Q; |
1067 |
|
const int Bias = (Q-1) | 1; |
1068 |
|
const int Lev0 = Mult + Bias; |
1069 |
|
const int Lambda = Trellis_Lambda_Tabs[Q-1]; /* it's 1/lambda, actually */ |
1070 |
|
|
1071 |
|
int Run_Start = -1; |
1072 |
|
Run_Costs[-1] = 2<<16; /* source (w/ CBP penalty) */ |
1073 |
|
uint32_t Min_Cost = 2<<16; |
1074 |
|
|
1075 |
|
int Last_Node = -1; |
1076 |
|
uint32_t Last_Cost = 0; |
1077 |
|
|
1078 |
|
int i, j; |
1079 |
|
|
1080 |
|
#if (DBG>0) |
1081 |
|
Last.Level = 0; Last.Run = -1; /* just initialize to smthg */ |
1082 |
|
#endif |
1083 |
|
|
1084 |
|
Non_Zero = Find_Last(Out, Zigzag, Non_Zero); |
1085 |
|
if (Non_Zero<0) |
1086 |
|
return -1; |
1087 |
|
|
1088 |
|
for(i=0; i<=Non_Zero; i++) |
1089 |
|
{ |
1090 |
|
const int AC = In[Zigzag[i]]; |
1091 |
|
const int Level1 = Out[Zigzag[i]]; |
1092 |
|
const int Dist0 = Lambda* AC*AC; |
1093 |
|
uint32_t Best_Cost = 0xf0000000; |
1094 |
|
Last_Cost += Dist0; |
1095 |
|
|
1096 |
|
if ((uint32_t)(Level1+1)<3) /* very specialized loop for -1,0,+1 */ |
1097 |
|
{ |
1098 |
|
int dQ; |
1099 |
|
int Run; |
1100 |
|
uint32_t Cost0; |
1101 |
|
|
1102 |
|
if (AC<0) { |
1103 |
|
Nodes[i].Level = -1; |
1104 |
|
dQ = Lev0 + AC; |
1105 |
|
} else { |
1106 |
|
Nodes[i].Level = 1; |
1107 |
|
dQ = Lev0 - AC; |
1108 |
|
} |
1109 |
|
Cost0 = Lambda*dQ*dQ; |
1110 |
|
|
1111 |
|
Nodes[i].Run = 1; |
1112 |
|
Best_Cost = (Code_Len20[0]<<16) + Run_Costs[i-1]+Cost0; |
1113 |
|
for(Run=i-Run_Start; Run>0; --Run) |
1114 |
|
{ |
1115 |
|
const uint32_t Cost_Base = Cost0 + Run_Costs[i-Run]; |
1116 |
|
const uint32_t Cost = Cost_Base + (Code_Len20[Run-1]<<16); |
1117 |
|
const uint32_t lCost = Cost_Base + (Code_Len24[Run-1]<<16); |
1118 |
|
|
1119 |
|
/* |
1120 |
|
* TODO: what about tie-breaks? Should we favor short runs or |
1121 |
|
* long runs? Although the error is the same, it would not be |
1122 |
|
* spread the same way along high and low frequencies... |
1123 |
|
*/ |
1124 |
|
if (Cost<Best_Cost) { |
1125 |
|
Best_Cost = Cost; |
1126 |
|
Nodes[i].Run = Run; |
1127 |
|
} |
1128 |
|
|
1129 |
|
if (lCost<Last_Cost) { |
1130 |
|
Last_Cost = lCost; |
1131 |
|
Last.Run = Run; |
1132 |
|
Last_Node = i; |
1133 |
|
} |
1134 |
|
} |
1135 |
|
if (Last_Node==i) |
1136 |
|
Last.Level = Nodes[i].Level; |
1137 |
|
|
1138 |
|
if (DBG==1) { |
1139 |
|
Run_Costs[i] = Best_Cost; |
1140 |
|
printf( "Costs #%2d: ", i); |
1141 |
|
for(j=-1;j<=Non_Zero;++j) { |
1142 |
|
if (j==Run_Start) printf( " %3.0d|", Run_Costs[j]>>12 ); |
1143 |
|
else if (j>Run_Start && j<i) printf( " %3.0d|", Run_Costs[j]>>12 ); |
1144 |
|
else if (j==i) printf( "(%3.0d)", Run_Costs[j]>>12 ); |
1145 |
|
else printf( " - |" ); |
1146 |
|
} |
1147 |
|
printf( "<%3.0d %2d %d>", Min_Cost>>12, Nodes[i].Level, Nodes[i].Run ); |
1148 |
|
printf( " Last:#%2d {%3.0d %2d %d}", Last_Node, Last_Cost>>12, Last.Level, Last.Run ); |
1149 |
|
printf( " AC:%3.0d Dist0:%3d Dist(%d)=%d", AC, Dist0>>12, Nodes[i].Level, Cost0>>12 ); |
1150 |
|
printf( "\n" ); |
1151 |
|
} |
1152 |
|
} |
1153 |
|
else /* "big" levels */ |
1154 |
|
{ |
1155 |
|
const uint8_t *Tbl_L1, *Tbl_L2, *Tbl_L1_Last, *Tbl_L2_Last; |
1156 |
|
int Level2; |
1157 |
|
int dQ1, dQ2; |
1158 |
|
int Run; |
1159 |
|
uint32_t Dist1,Dist2; |
1160 |
|
int dDist21; |
1161 |
|
|
1162 |
|
if (Level1>1) { |
1163 |
|
dQ1 = Level1*Mult-AC + Bias; |
1164 |
|
dQ2 = dQ1 - Mult; |
1165 |
|
Level2 = Level1-1; |
1166 |
|
Tbl_L1 = (Level1<=24) ? B16_17_Code_Len[Level1-1] : Code_Len0; |
1167 |
|
Tbl_L2 = (Level2<=24) ? B16_17_Code_Len[Level2-1] : Code_Len0; |
1168 |
|
Tbl_L1_Last = (Level1<=6) ? B16_17_Code_Len_Last[Level1-1] : Code_Len0; |
1169 |
|
Tbl_L2_Last = (Level2<=6) ? B16_17_Code_Len_Last[Level2-1] : Code_Len0; |
1170 |
|
} else { /* Level1<-1 */ |
1171 |
|
dQ1 = Level1*Mult-AC - Bias; |
1172 |
|
dQ2 = dQ1 + Mult; |
1173 |
|
Level2 = Level1 + 1; |
1174 |
|
Tbl_L1 = (Level1>=-24) ? B16_17_Code_Len[Level1^-1] : Code_Len0; |
1175 |
|
Tbl_L2 = (Level2>=-24) ? B16_17_Code_Len[Level2^-1] : Code_Len0; |
1176 |
|
Tbl_L1_Last = (Level1>=- 6) ? B16_17_Code_Len_Last[Level1^-1] : Code_Len0; |
1177 |
|
Tbl_L2_Last = (Level2>=- 6) ? B16_17_Code_Len_Last[Level2^-1] : Code_Len0; |
1178 |
|
} |
1179 |
|
Dist1 = Lambda*dQ1*dQ1; |
1180 |
|
Dist2 = Lambda*dQ2*dQ2; |
1181 |
|
dDist21 = Dist2-Dist1; |
1182 |
|
|
1183 |
|
for(Run=i-Run_Start; Run>0; --Run) |
1184 |
|
{ |
1185 |
|
const uint32_t Cost_Base = Dist1 + Run_Costs[i-Run]; |
1186 |
|
uint32_t Cost1, Cost2; |
1187 |
|
int bLevel; |
1188 |
|
|
1189 |
|
/* |
1190 |
|
* for sub-optimal (but slightly worth it, speed-wise) search, uncomment the following: |
1191 |
|
* if (Cost_Base>=Best_Cost) continue; |
1192 |
|
*/ |
1193 |
|
Cost1 = Cost_Base + (Tbl_L1[Run-1]<<16); |
1194 |
|
Cost2 = Cost_Base + (Tbl_L2[Run-1]<<16) + dDist21; |
1195 |
|
|
1196 |
|
if (Cost2<Cost1) { |
1197 |
|
Cost1 = Cost2; |
1198 |
|
bLevel = Level2; |
1199 |
|
} else |
1200 |
|
bLevel = Level1; |
1201 |
|
|
1202 |
|
if (Cost1<Best_Cost) { |
1203 |
|
Best_Cost = Cost1; |
1204 |
|
Nodes[i].Run = Run; |
1205 |
|
Nodes[i].Level = bLevel; |
1206 |
|
} |
1207 |
|
|
1208 |
|
Cost1 = Cost_Base + (Tbl_L1_Last[Run-1]<<16); |
1209 |
|
Cost2 = Cost_Base + (Tbl_L2_Last[Run-1]<<16) + dDist21; |
1210 |
|
|
1211 |
|
if (Cost2<Cost1) { |
1212 |
|
Cost1 = Cost2; |
1213 |
|
bLevel = Level2; |
1214 |
|
} else |
1215 |
|
bLevel = Level1; |
1216 |
|
|
1217 |
|
if (Cost1<Last_Cost) { |
1218 |
|
Last_Cost = Cost1; |
1219 |
|
Last.Run = Run; |
1220 |
|
Last.Level = bLevel; |
1221 |
|
Last_Node = i; |
1222 |
|
} |
1223 |
|
} /* end of "for Run" */ |
1224 |
|
|
1225 |
|
if (DBG==1) { |
1226 |
|
Run_Costs[i] = Best_Cost; |
1227 |
|
printf( "Costs #%2d: ", i); |
1228 |
|
for(j=-1;j<=Non_Zero;++j) { |
1229 |
|
if (j==Run_Start) printf( " %3.0d|", Run_Costs[j]>>12 ); |
1230 |
|
else if (j>Run_Start && j<i) printf( " %3.0d|", Run_Costs[j]>>12 ); |
1231 |
|
else if (j==i) printf( "(%3.0d)", Run_Costs[j]>>12 ); |
1232 |
|
else printf( " - |" ); |
1233 |
|
} |
1234 |
|
printf( "<%3.0d %2d %d>", Min_Cost>>12, Nodes[i].Level, Nodes[i].Run ); |
1235 |
|
printf( " Last:#%2d {%3.0d %2d %d}", Last_Node, Last_Cost>>12, Last.Level, Last.Run ); |
1236 |
|
printf( " AC:%3.0d Dist0:%3d Dist(%2d):%3d Dist(%2d):%3d", AC, Dist0>>12, Level1, Dist1>>12, Level2, Dist2>>12 ); |
1237 |
|
printf( "\n" ); |
1238 |
|
} |
1239 |
|
} |
1240 |
|
|
1241 |
|
Run_Costs[i] = Best_Cost; |
1242 |
|
|
1243 |
|
if (Best_Cost < Min_Cost + Dist0) { |
1244 |
|
Min_Cost = Best_Cost; |
1245 |
|
Run_Start = i; |
1246 |
|
} |
1247 |
|
else |
1248 |
|
{ |
1249 |
|
/* |
1250 |
|
* as noticed by Michael Niedermayer (michaelni at gmx.at), there's |
1251 |
|
* a code shorter by 1 bit for a larger run (!), same level. We give |
1252 |
|
* it a chance by not moving the left barrier too much. |
1253 |
|
*/ |
1254 |
|
|
1255 |
|
while( Run_Costs[Run_Start]>Min_Cost+(1<<16) ) |
1256 |
|
Run_Start++; |
1257 |
|
|
1258 |
|
/* spread on preceding coeffs the cost incurred by skipping this one */ |
1259 |
|
for(j=Run_Start; j<i; ++j) Run_Costs[j] += Dist0; |
1260 |
|
Min_Cost += Dist0; |
1261 |
|
} |
1262 |
|
} |
1263 |
|
|
1264 |
|
if (DBG) { |
1265 |
|
Last_Cost = Evaluate_Cost(Out,Mult,Bias, Zigzag,Non_Zero, Lambda); |
1266 |
|
if (DBG==1) { |
1267 |
|
printf( "=> " ); |
1268 |
|
for(i=0; i<=Non_Zero; ++i) printf( "[%3.0d] ", Out[Zigzag[i]] ); |
1269 |
|
printf( "\n" ); |
1270 |
|
} |
1271 |
|
} |
1272 |
|
|
1273 |
|
if (Last_Node<0) |
1274 |
|
return -1; |
1275 |
|
|
1276 |
|
/* reconstruct optimal sequence backward with surviving paths */ |
1277 |
|
memset(Out, 0x00, 64*sizeof(*Out)); |
1278 |
|
Out[Zigzag[Last_Node]] = Last.Level; |
1279 |
|
i = Last_Node - Last.Run; |
1280 |
|
while(i>=0) { |
1281 |
|
Out[Zigzag[i]] = Nodes[i].Level; |
1282 |
|
i -= Nodes[i].Run; |
1283 |
|
} |
1284 |
|
|
1285 |
|
if (DBG) { |
1286 |
|
uint32_t Cost = Evaluate_Cost(Out,Mult,Bias, Zigzag,Non_Zero, Lambda); |
1287 |
|
if (DBG==1) { |
1288 |
|
printf( "<= " ); |
1289 |
|
for(i=0; i<=Last_Node; ++i) printf( "[%3.0d] ", Out[Zigzag[i]] ); |
1290 |
|
printf( "\n--------------------------------\n" ); |
1291 |
|
} |
1292 |
|
if (Cost>Last_Cost) printf( "!!! %u > %u\n", Cost, Last_Cost ); |
1293 |
|
} |
1294 |
|
return Last_Node; |
1295 |
|
} |
1296 |
|
|
1297 |
|
#undef DBG |
1298 |
|
|
1299 |
|
#endif |