41 |
* * |
* * |
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* Revision history: * |
* Revision history: * |
43 |
* * |
* * |
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* 01.05.2002 added BVOP support to BitstreamWriteVopHeader |
* 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 * |
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#include "../quant/quant_matrix.h" |
#include "../quant/quant_matrix.h" |
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62 |
static int __inline log2bin(int value) |
static uint32_t __inline log2bin(uint32_t value) |
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{ |
{ |
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/* Changed by Chenm001 */ |
/* Changed by Chenm001 */ |
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#ifndef WIN32 |
#ifndef WIN32 |
116 |
returns coding_type, or -1 if error |
returns coding_type, or -1 if error |
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*/ |
*/ |
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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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{ |
{ |
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uint32_t vol_ver_id; |
uint32_t vol_ver_id; |
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uint32_t time_inc_resolution; |
static uint32_t time_increment_resolution; |
123 |
uint32_t coding_type; |
uint32_t coding_type; |
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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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do |
do |
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{ |
{ |
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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 |
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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 |
} |
} |
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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); |
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|
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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++; |
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|
475 |
READ_MARKER(); |
READ_MARKER(); |
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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) |
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{ |
{ |
481 |
BitstreamSkip(bs, dec->time_inc_bits); // vop_time_increment |
//BitstreamSkip(bs, dec->time_inc_bits); // vop_time_increment |
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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{ |
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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); |
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} |
} |
494 |
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//DEBUG1("time_increment=",time_increment); |
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496 |
READ_MARKER(); |
READ_MARKER(); |
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505 |
} |
} |
506 |
*/ |
*/ |
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|
508 |
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 |
{ |
{ |
511 |
*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; |
565 |
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|
566 |
//DEBUG1("quant", *quant); |
//DEBUG1("quant", *quant); |
567 |
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|
568 |
if (coding_type != I_VOP) |
if (coding_type != I_VOP) |
569 |
{ |
{ |
570 |
*fcode = BitstreamGetBits(bs, 3); // fcode_forward |
*fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward |
571 |
} |
} |
572 |
|
|
573 |
if (coding_type == B_VOP) |
if (coding_type == B_VOP) |
574 |
{ |
{ |
575 |
// *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward |
*fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward |
576 |
|
} |
577 |
|
if (!dec->scalability){ |
578 |
|
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 |
} |
} |
652 |
25fps res=25 inc=1 |
25fps res=25 inc=1 |
653 |
29.97fps res=30000 inc=1001 |
29.97fps res=30000 inc=1001 |
654 |
*/ |
*/ |
655 |
|
#ifdef BFRAMES |
656 |
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BitstreamPutBits(bs, pParam->fbase, 16); |
657 |
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#else |
658 |
BitstreamPutBits(bs, 2, 16); |
BitstreamPutBits(bs, 2, 16); |
659 |
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#endif |
660 |
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661 |
WRITE_MARKER(); |
WRITE_MARKER(); |
662 |
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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 |
#ifdef BFRAMES |
741 |
BitstreamPutBits(bs, frame->ticks, 5); |
BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
742 |
dprintf("[%i:%i] %c\n", frame->seconds, frame->ticks, frame->coding_type == I_VOP ? 'I' : frame->coding_type == P_VOP ? 'P' : 'B'); |
dprintf("[%i:%i] %c\n", frame->seconds, frame->ticks, frame->coding_type == I_VOP ? 'I' : frame->coding_type == P_VOP ? 'P' : 'B'); |
743 |
#else |
#else |
744 |
BitstreamPutBits(bs, 1, 1); |
BitstreamPutBits(bs, 1, 1); |
748 |
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|
749 |
BitstreamPutBits(bs, 1, 1); // vop_coded |
BitstreamPutBits(bs, 1, 1); // vop_coded |
750 |
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|
751 |
if (frame->coding_type != I_VOP) |
if (frame->coding_type == P_VOP) |
752 |
BitstreamPutBits(bs, frame->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 |