41 |
* * |
* * |
42 |
* Revision history: * |
* Revision history: * |
43 |
* * |
* * |
44 |
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* 06.05.2002 fixed fincr/fbase error * |
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* 01.05.2002 added BVOP support to BitstreamWriteVopHeader * |
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* 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> * |
* 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> * |
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* 26.03.2002 interlacing support * |
* 26.03.2002 interlacing support * |
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* 03.03.2002 qmatrix writing * |
* 03.03.2002 qmatrix writing * |
59 |
#include "../quant/quant_matrix.h" |
#include "../quant/quant_matrix.h" |
60 |
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61 |
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62 |
static int __inline log2bin(int value) |
static uint32_t __inline log2bin(uint32_t value) |
63 |
{ |
{ |
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/* Changed by Chenm001 */ |
/* Changed by Chenm001 */ |
65 |
#ifndef WIN32 |
#ifndef WIN32 |
116 |
returns coding_type, or -1 if error |
returns coding_type, or -1 if error |
117 |
*/ |
*/ |
118 |
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119 |
int BitstreamReadHeaders(Bitstream * bs, DECODER * dec, uint32_t * rounding, uint32_t * quant, uint32_t * fcode, uint32_t * intra_dc_threshold) |
int BitstreamReadHeaders(Bitstream * bs, DECODER * dec, uint32_t * rounding, uint32_t * quant, uint32_t * fcode_forward, uint32_t * fcode_backward, uint32_t * intra_dc_threshold) |
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{ |
{ |
121 |
uint32_t vol_ver_id; |
uint32_t vol_ver_id; |
122 |
uint32_t time_inc_resolution; |
static uint32_t time_increment_resolution; |
123 |
uint32_t coding_type; |
uint32_t coding_type; |
124 |
uint32_t start_code; |
uint32_t start_code; |
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|
uint32_t time_incr=0; |
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|
int32_t time_increment; |
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|
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do |
do |
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{ |
{ |
252 |
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READ_MARKER(); |
READ_MARKER(); |
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|
255 |
time_inc_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution |
// *************************** for decode B-frame time *********************** |
256 |
time_inc_resolution--; |
time_increment_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution |
257 |
if (time_inc_resolution > 0) |
time_increment_resolution--; |
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|
//DEBUG1("time_increment_resolution=",time_increment_resolution); |
259 |
|
if (time_increment_resolution > 0) |
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{ |
{ |
261 |
dec->time_inc_bits = log2bin(time_inc_resolution); |
dec->time_inc_bits = log2bin(time_increment_resolution); |
262 |
} |
} |
263 |
else |
else |
264 |
{ |
{ |
422 |
} |
} |
423 |
} |
} |
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|
|
425 |
if (BitstreamGetBit(bs)) // scalability |
if ((dec->scalability=BitstreamGetBit(bs))) // scalability |
426 |
{ |
{ |
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// TODO |
// TODO |
428 |
DEBUG("TODO: scalability"); |
DEBUG("TODO: scalability"); |
468 |
coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
469 |
//DEBUG1("coding_type", coding_type); |
//DEBUG1("coding_type", coding_type); |
470 |
|
|
471 |
while (BitstreamGetBit(bs) != 0) ; // time_base |
// *************************** for decode B-frame time *********************** |
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while (BitstreamGetBit(bs) != 0) // time_base |
473 |
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time_incr++; |
474 |
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|
475 |
READ_MARKER(); |
READ_MARKER(); |
476 |
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|
478 |
//DEBUG1("vop_time_incr", BitstreamShowBits(bs, dec->time_inc_bits)); |
//DEBUG1("vop_time_incr", BitstreamShowBits(bs, dec->time_inc_bits)); |
479 |
if (dec->time_inc_bits) |
if (dec->time_inc_bits) |
480 |
{ |
{ |
481 |
BitstreamSkip(bs, dec->time_inc_bits); // vop_time_increment |
//BitstreamSkip(bs, dec->time_inc_bits); // vop_time_increment |
482 |
|
time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); // vop_time_increment |
483 |
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} |
484 |
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if(coding_type != B_VOP){ |
485 |
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dec->last_time_base = dec->time_base; |
486 |
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dec->time_base += time_incr; |
487 |
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dec->time = dec->time_base*time_increment_resolution + time_increment; |
488 |
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dec->time_pp= (uint32_t)(dec->time - dec->last_non_b_time); |
489 |
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dec->last_non_b_time= dec->time; |
490 |
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}else{ |
491 |
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dec->time = (dec->last_time_base + time_incr)*time_increment_resolution + time_increment; |
492 |
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dec->time_bp= (uint32_t)(dec->last_non_b_time - dec->time); |
493 |
} |
} |
494 |
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//DEBUG1("time_increment=",time_increment); |
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|
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READ_MARKER(); |
READ_MARKER(); |
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|
505 |
} |
} |
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*/ |
*/ |
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|
|
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if (coding_type != I_VOP) |
// fix a little bug by MinChen <chenm002@163.com> |
509 |
|
if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) && (coding_type == P_VOP)) |
510 |
{ |
{ |
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*rounding = BitstreamGetBit(bs); // rounding_type |
*rounding = BitstreamGetBit(bs); // rounding_type |
512 |
//DEBUG1("rounding", *rounding); |
//DEBUG1("rounding", *rounding); |
560 |
} |
} |
561 |
} |
} |
562 |
|
|
563 |
*quant = BitstreamGetBits(bs, dec->quant_bits); // vop_quant |
if((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) // vop_quant |
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*quant = 1; |
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|
566 |
//DEBUG1("quant", *quant); |
//DEBUG1("quant", *quant); |
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|
568 |
if (coding_type != I_VOP) |
if (coding_type != I_VOP) |
569 |
{ |
{ |
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*fcode = BitstreamGetBits(bs, 3); // fcode_forward |
*fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward |
571 |
} |
} |
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|
|
573 |
if (coding_type == B_VOP) |
if (coding_type == B_VOP) |
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{ |
{ |
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// *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward |
*fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward |
576 |
|
} |
577 |
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if (!dec->scalability){ |
578 |
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if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) && (coding_type != I_VOP)){ |
579 |
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BitstreamSkip(bs, 1); // vop_shape_coding_type |
580 |
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} |
581 |
} |
} |
582 |
return coding_type; |
return coding_type; |
583 |
} |
} |
627 |
write vol header |
write vol header |
628 |
*/ |
*/ |
629 |
void BitstreamWriteVolHeader(Bitstream * const bs, |
void BitstreamWriteVolHeader(Bitstream * const bs, |
630 |
const MBParam * pParam) |
const MBParam * pParam, const FRAMEINFO * frame) |
631 |
{ |
{ |
632 |
// video object_start_code & vo_id |
// video object_start_code & vo_id |
633 |
BitstreamPad(bs); |
BitstreamPad(bs); |
652 |
25fps res=25 inc=1 |
25fps res=25 inc=1 |
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29.97fps res=30000 inc=1001 |
29.97fps res=30000 inc=1001 |
654 |
*/ |
*/ |
655 |
|
#ifdef BFRAMES |
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BitstreamPutBits(bs, pParam->fbase, 16); |
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#else |
658 |
BitstreamPutBits(bs, 2, 16); |
BitstreamPutBits(bs, 2, 16); |
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#endif |
660 |
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661 |
WRITE_MARKER(); |
WRITE_MARKER(); |
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BitstreamPutBits(bs, pParam->height, 13); // height |
BitstreamPutBits(bs, pParam->height, 13); // height |
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WRITE_MARKER(); |
WRITE_MARKER(); |
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BitstreamPutBit(bs, pParam->global_flags & XVID_INTERLACING); // interlace |
BitstreamPutBit(bs, frame->global_flags & XVID_INTERLACING); // interlace |
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BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation) |
BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation) |
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BitstreamPutBit(bs, 0); // sprite_enable |
BitstreamPutBit(bs, 0); // sprite_enable |
678 |
BitstreamPutBit(bs, 0); // not_in_bit |
BitstreamPutBit(bs, 0); // not_in_bit |
679 |
|
|
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// quant_type 0=h.263 1=mpeg4(quantizer tables) |
// quant_type 0=h.263 1=mpeg4(quantizer tables) |
681 |
BitstreamPutBit(bs, pParam->quant_type); |
BitstreamPutBit(bs, pParam->m_quant_type); |
682 |
|
|
683 |
if (pParam->quant_type) |
if (pParam->m_quant_type) |
684 |
{ |
{ |
685 |
BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat |
BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat |
686 |
if (get_intra_matrix_status()) |
if (get_intra_matrix_status()) |
712 |
(decoder uses these values to determine precise time since last resync) |
(decoder uses these values to determine precise time since last resync) |
713 |
*/ |
*/ |
714 |
void BitstreamWriteVopHeader(Bitstream * const bs, |
void BitstreamWriteVopHeader(Bitstream * const bs, |
715 |
const MBParam * pParam) |
const MBParam * pParam, |
716 |
|
const FRAMEINFO * frame) |
717 |
{ |
{ |
718 |
|
#ifdef BFRAMES |
719 |
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uint32_t i; |
720 |
|
#endif |
721 |
BitstreamPad(bs); |
BitstreamPad(bs); |
722 |
BitstreamPutBits(bs, VOP_START_CODE, 32); |
BitstreamPutBits(bs, VOP_START_CODE, 32); |
723 |
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|
724 |
BitstreamPutBits(bs, pParam->coding_type, 2); |
BitstreamPutBits(bs, frame->coding_type, 2); |
725 |
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726 |
// time_base = 0 write n x PutBit(1), PutBit(0) |
// time_base = 0 write n x PutBit(1), PutBit(0) |
727 |
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#ifdef BFRAMES |
728 |
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for (i = 0; i < frame->seconds; i++) |
729 |
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{ |
730 |
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BitstreamPutBit(bs, 1); |
731 |
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} |
732 |
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BitstreamPutBit(bs, 0); |
733 |
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#else |
734 |
BitstreamPutBits(bs, 0, 1); |
BitstreamPutBits(bs, 0, 1); |
735 |
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#endif |
736 |
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737 |
WRITE_MARKER(); |
WRITE_MARKER(); |
738 |
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739 |
// time_increment: value=nth_of_sec, nbits = log2(resolution) |
// time_increment: value=nth_of_sec, nbits = log2(resolution) |
740 |
|
#ifdef BFRAMES |
741 |
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BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
742 |
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dprintf("[%i:%i] %c\n", frame->seconds, frame->ticks, frame->coding_type == I_VOP ? 'I' : frame->coding_type == P_VOP ? 'P' : 'B'); |
743 |
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#else |
744 |
BitstreamPutBits(bs, 1, 1); |
BitstreamPutBits(bs, 1, 1); |
745 |
|
#endif |
746 |
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|
747 |
WRITE_MARKER(); |
WRITE_MARKER(); |
748 |
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|
749 |
BitstreamPutBits(bs, 1, 1); // vop_coded |
BitstreamPutBits(bs, 1, 1); // vop_coded |
750 |
|
|
751 |
if (pParam->coding_type != I_VOP) |
if (frame->coding_type == P_VOP) |
752 |
BitstreamPutBits(bs, pParam->rounding_type, 1); |
BitstreamPutBits(bs, frame->rounding_type, 1); |
753 |
|
|
754 |
BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |
BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |
755 |
|
|
756 |
if (pParam->global_flags & XVID_INTERLACING) |
if (frame->global_flags & XVID_INTERLACING) |
757 |
{ |
{ |
758 |
BitstreamPutBit(bs, 1); // top field first |
BitstreamPutBit(bs, 1); // top field first |
759 |
BitstreamPutBit(bs, 0); // alternate vertical scan |
BitstreamPutBit(bs, 0); // alternate vertical scan |
760 |
} |
} |
761 |
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|
762 |
BitstreamPutBits(bs, pParam->quant, 5); // quantizer |
BitstreamPutBits(bs, frame->quant, 5); // quantizer |
763 |
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|
764 |
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if (frame->coding_type != I_VOP) |
765 |
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BitstreamPutBits(bs, frame->fcode, 3); // forward_fixed_code |
766 |
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|
767 |
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if (frame->coding_type == B_VOP) |
768 |
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BitstreamPutBits(bs, frame->bcode, 3); // backward_fixed_code |
769 |
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if (pParam->coding_type != I_VOP) |
|
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BitstreamPutBits(bs, pParam->fixed_code, 3); // fixed_code = [1,4] |
|
770 |
} |
} |