41 |
* * |
* * |
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* Revision history: * |
* Revision history: * |
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* * |
* * |
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* 01.05.2002 added BVOP support to BitstreamWriteVopHeader |
* 08.05.2002 add low_delay support for B_VOP decode * |
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* MinChen <chenm001@163.com> * |
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* 06.05.2002 low_delay * |
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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 * |
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#include "../quant/quant_matrix.h" |
#include "../quant/quant_matrix.h" |
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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 |
119 |
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; |
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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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{ |
{ |
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DEBUG("+ vol_control_parameters"); |
DEBUG("+ vol_control_parameters"); |
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BitstreamSkip(bs, 2); // chroma_format |
BitstreamSkip(bs, 2); // chroma_format |
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BitstreamSkip(bs, 1); // low_delay |
dec->low_delay=BitstreamGetBit(bs); // low_delay |
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if (BitstreamGetBit(bs)) // vbv_parameters |
if (BitstreamGetBit(bs)) // vbv_parameters |
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{ |
{ |
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DEBUG("+ vbv_parameters"); |
DEBUG("+ vbv_parameters"); |
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READ_MARKER(); |
READ_MARKER(); |
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time_inc_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution |
// *************************** for decode B-frame time *********************** |
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time_inc_resolution--; |
time_increment_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution |
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if (time_inc_resolution > 0) |
time_increment_resolution--; |
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//DEBUG1("time_increment_resolution=",time_increment_resolution); |
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if (time_increment_resolution > 0) |
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{ |
{ |
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dec->time_inc_bits = log2bin(time_inc_resolution); |
dec->time_inc_bits = log2bin(time_increment_resolution); |
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} |
} |
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else |
else |
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{ |
{ |
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} |
} |
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} |
} |
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|
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if (BitstreamGetBit(bs)) // scalability |
if ((dec->scalability=BitstreamGetBit(bs))) // scalability |
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{ |
{ |
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// TODO |
// TODO |
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DEBUG("TODO: scalability"); |
DEBUG("TODO: scalability"); |
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coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
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//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 |
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time_incr++; |
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READ_MARKER(); |
READ_MARKER(); |
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//DEBUG1("vop_time_incr", BitstreamShowBits(bs, dec->time_inc_bits)); |
//DEBUG1("vop_time_incr", BitstreamShowBits(bs, dec->time_inc_bits)); |
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if (dec->time_inc_bits) |
if (dec->time_inc_bits) |
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{ |
{ |
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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 |
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} |
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if(coding_type != B_VOP){ |
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dec->last_time_base = dec->time_base; |
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dec->time_base += time_incr; |
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dec->time = dec->time_base*time_increment_resolution + time_increment; |
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dec->time_pp= (uint32_t)(dec->time - dec->last_non_b_time); |
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dec->last_non_b_time= dec->time; |
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}else{ |
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dec->time = (dec->last_time_base + time_incr)*time_increment_resolution + time_increment; |
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dec->time_bp= (uint32_t)(dec->last_non_b_time - dec->time); |
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} |
} |
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//DEBUG1("time_increment=",time_increment); |
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READ_MARKER(); |
READ_MARKER(); |
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508 |
} |
} |
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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> |
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if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) && (coding_type == P_VOP)) |
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{ |
{ |
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*rounding = BitstreamGetBit(bs); // rounding_type |
*rounding = BitstreamGetBit(bs); // rounding_type |
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//DEBUG1("rounding", *rounding); |
//DEBUG1("rounding", *rounding); |
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} |
} |
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} |
} |
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*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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//DEBUG1("quant", *quant); |
//DEBUG1("quant", *quant); |
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|
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if (coding_type != I_VOP) |
if (coding_type != I_VOP) |
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{ |
{ |
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*fcode = BitstreamGetBits(bs, 3); // fcode_forward |
*fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward |
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} |
} |
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|
576 |
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 |
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} |
580 |
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if (!dec->scalability){ |
581 |
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if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) && (coding_type != I_VOP)){ |
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BitstreamSkip(bs, 1); // vop_shape_coding_type |
583 |
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} |
584 |
} |
} |
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return coding_type; |
return coding_type; |
586 |
} |
} |
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BitstreamPutBits(bs, 0, 8); // video_object_type_indication |
BitstreamPutBits(bs, 0, 8); // video_object_type_indication |
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BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given) |
BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given) |
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BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1) |
BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1) |
648 |
BitstreamPutBit(bs, 0); // vol_control_parameters (0=not given) |
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649 |
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#ifdef BFRAMES |
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if (pParam->max_bframes > 0) |
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{ |
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dprintf("low_delay=1"); |
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BitstreamPutBit(bs, 1); // vol_control_parameters |
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BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0" |
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BitstreamPutBit(bs, 0); // low_delay |
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BitstreamPutBit(bs, 0); // vbv_parameters (0=not given) |
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} |
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else |
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#endif |
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{ |
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BitstreamPutBits(bs, 0, 1); // vol_control_parameters (0=not given) |
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} |
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BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
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WRITE_MARKER(); |
WRITE_MARKER(); |
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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 |
673 |
*/ |
*/ |
674 |
|
#ifdef BFRAMES |
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BitstreamPutBits(bs, pParam->fbase, 16); |
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#else |
677 |
BitstreamPutBits(bs, 2, 16); |
BitstreamPutBits(bs, 2, 16); |
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#endif |
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680 |
WRITE_MARKER(); |
WRITE_MARKER(); |
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757 |
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// time_increment: value=nth_of_sec, nbits = log2(resolution) |
// time_increment: value=nth_of_sec, nbits = log2(resolution) |
759 |
#ifdef BFRAMES |
#ifdef BFRAMES |
760 |
BitstreamPutBits(bs, frame->ticks, 5); |
BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
761 |
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'); |
762 |
#else |
#else |
763 |
BitstreamPutBits(bs, 1, 1); |
BitstreamPutBits(bs, 1, 1); |
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768 |
BitstreamPutBits(bs, 1, 1); // vop_coded |
BitstreamPutBits(bs, 1, 1); // vop_coded |
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770 |
if (frame->coding_type != I_VOP) |
if (frame->coding_type == P_VOP) |
771 |
BitstreamPutBits(bs, frame->rounding_type, 1); |
BitstreamPutBits(bs, frame->rounding_type, 1); |
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|
773 |
BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |
BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |