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#include "ipuconv.hh"
#include <iostream>
#include <stdexcept>
IPUConv::IPUConv(std::vector<char> const& indata, std::string const& outfilename, bool pal): infile(indata), outfile(outfilename.c_str()) {
int sizex;
int sizey;
int frames;
int frame;
int dct_dc_y;
int dct_dc_cb;
int dct_dc_cr;
int quant;
int flag;
int mb;
int mb_source;
int intraquant;
int block;
int eob;
int size;
int diff = 0;
int absval;
long int FrameByte;
unsigned int FrameBit;
if (0x6970756d != infile.get(32)) throw std::runtime_error("Input data is no IPU");
infile.get(32); // Filesize
sizex=infile.get(8);
sizex=sizex+infile.get(8)*(1<<8);
sizey=infile.get(8);
sizey=sizey+infile.get(8)*(1<<8);
frames=infile.get(8);
frames=frames+infile.get(8)*(1<<8);
frames=frames+infile.get(8)*(1<<16);
frames=frames+infile.get(8)*(1<<24);
printf("%dx%d\n",sizex,sizey);
printf("%02d:%02d:%02d.%02d\n\n",frames/25/60/60,(frames%(25*60*60))/25/60,(frames%(25*60))/25,frames%25);
std::vector<t_MBData> MBData((sizex/16)*(sizey/16)+1);
for (frame=0;frame<frames;frame++){
if (frame % 100 == 0) std::cout << "Frame: " << frame << "/" << frames << "\r" << std::flush;
flag = infile.get(8);
if (flag & 32) {
fprintf (stderr,"Intra VLC format not supported\n");
exit(1);
}
if (frame==0) {
// Write Sequence Header
outfile.putbits(0x1b3,32);
outfile.putbits(sizex,12);
outfile.putbits(sizey,12);
outfile.putbits(0x1,4); // Ascpect Ratio 1 1:1
// 2 4:3
// 3 16:9
// 4 2.21:1
if(pal) {
outfile.putbits(0x3,4); // Framerate 3 25 fps
} else {
outfile.putbits(0x4,4); // Framerate 4 29.97 fps
}
outfile.putbits(0x30d4,18); // Bitrate ($3FFFF=Variabel)
outfile.putbits(1,1); // Marker, soll immer 1 sein
outfile.putbits(112,10); // VBV
outfile.putbits(0,1); // Constrained Parameter Flag
outfile.putbits(0,1); // Intra Matrix Standard
outfile.putbits(0,1); // Non-Intra Matrix Standard
//outfile.putbits(0x2cee100,32);
if (!(flag & 128)) {
// Sequence Extension
outfile.putbits(0x1b5,32);
outfile.putbits(0x1,4); // Start Code Identifier
outfile.putbits(0x4,4); // Main Profil
outfile.putbits(0x8,4); // Main Level
outfile.putbits(0x1,1); // Progressive Sequence
outfile.putbits(0x1,2); // Chroma Format 4:2:0
outfile.putbits(0x0,2); // Breite Extension
outfile.putbits(0x0,2); // Höhe Extension
outfile.putbits(0x0,12); // Bitrate Extension
outfile.putbits(0x1,1); // Marker
outfile.putbits(0x0,8); // VBV Buffer Extension
outfile.putbits(0x0,1); // Low Delay
outfile.putbits(0x0,2); // Framerate Extension Numerator
outfile.putbits(0x0,5); // Framerate Extension Denominator
//outfile.putbits(0x148a0001,32);
//outfile.putbits(0,16);
// Sequence Display Extension
/*
outfile.putbits(0x1b5,32);
outfile.putbits(0x2,4); // Start Code Identifier
outfile.putbits(0x1,3); // Video Format 1 PAL
outfile.putbits(0x0,1); // Bit Color
outfile.putbits(0x23050504,32);
outfile.putbits(sizex,14); // Display Breite
outfile.putbits(1,1); // Marker
outfile.putbits(sizey,14); // Display Höhe
outfile.putbits(0,3);
*/
}
}
// Write GOP Header
outfile.putbits(0x1b8,32);
outfile.putbits(0,1); // Drop Frame
outfile.putbits(frame/25/60/60,5); // Stunden
outfile.putbits((frame%(25*60*60))/25/60,6); // Minuten
outfile.putbits(1,1); // Marker
outfile.putbits((frame%(25*60))/25,6);// Sekunden
outfile.putbits(frame%25,6); // Frames
outfile.putbits(1,1); // Closed GOP
outfile.putbits(0,6);
// Write Picture Header
outfile.putbits(0x100,32);
outfile.putbits(0x0,10); // Temporal Reference
outfile.putbits(0x1,3); // Coding Type Intra
outfile.putbits(0xffff,16); // VBV Delay
outfile.putbits(0,3);
// outfile.putbits(0xffff8,32);
// Write Picture Coding Extension
if (!(flag & 128)) {
outfile.putbits(0x1b5,32);
outfile.putbits(0x8ffff,20);
outfile.putbits(flag&3,2); // Intra DC Precision
outfile.putbits(3,2); // Frame Picture
outfile.putbits(2,3);
outfile.putbits((flag&64)/64,1); // QST
outfile.putbits(0,1); // Intra VLC Format
outfile.putbits((flag&16)/16,1); // Alternate Scan
outfile.putbits(1,2);
outfile.putbits(0x80,8);
}
// Write Slice Header
outfile.putbits(0x1,24);
outfile.putbits(1,8);
outfile.putbits(1,5); // Quantiser
outfile.putbits(0,1); // Extra Bit clear
// infile.get Macroblock-infos
dct_dc_y = 0;
dct_dc_cb = 0;
dct_dc_cr = 0;
quant = 1;
for(mb=0;mb<(sizex/16)*(sizey/16);mb++) {
if (mb>0 && !infile.get(1)) throw std::runtime_error("MBA_Incr wrong in IPU");
// Save position (in IPU) of Macroblock
infile.getpos(&MBData[mb].Byte,&MBData[mb].Bit);
if (infile.get(1)) intraquant = 0;
else {
if (!infile.get(1)) throw std::runtime_error("MBT wrong in IPU");
intraquant = 1;
}
if (flag & 4) infile.get(1);
if (intraquant) quant = infile.get(5);
MBData[mb].quant = quant;
for(block=0;block<6;block++) {
if (block<4) {
if ( (size = infile.get_dcs_y())) {
diff = infile.get(size);
if (!(diff & (1 << (size - 1)))) diff = (-1 << size) | (diff + 1);
dct_dc_y += diff;
}
if (block==0) MBData[mb].dct_dc_y = dct_dc_y;
} else {
if ( (size = infile.get_dcs_c())) {
diff = infile.get(size);
if (!(diff & (1 << (size - 1)))) diff = (-1 << size) | (diff + 1);
}
if (block==4) {
if (size) dct_dc_cb += diff;
MBData[mb].dct_dc_cb = dct_dc_cb;
} else {
if (size) dct_dc_cr += diff;
MBData[mb].dct_dc_cr = dct_dc_cr;
}
}
do {
eob = vlc(0);
if (eob == 0) infile.get(1);
} while (eob!=1);
}
}
infile.getpos(&FrameByte,&FrameBit); // Position speichern
// Write Macroblocks
dct_dc_y = 0;
dct_dc_cb = 0;
dct_dc_cr = 0;
quant = 1;
for(mb=0;mb<(sizex/16)*(sizey/16);mb++) {
mb_source = (mb % (sizex / 16)) * (sizey / 16)+ mb / (sizex / 16); // Singstar
// mb_source = mb; // Other IPUs
outfile.putbits(1,1); // MBA_Incr=1
infile.setpos(MBData[mb_source].Byte,MBData[mb_source].Bit);
if (infile.get(1)) intraquant = 0;
else {
if (!infile.get(1)) throw std::runtime_error("MBT wrong in IPU");
intraquant = 1;
}
if (mb == 0 || (MBData[mb_source].quant != quant)) outfile.putbits(1,2);
else outfile.putbits(1,1);
if (flag & 4) outfile.putbits(infile.get(1),1);
if (intraquant) quant = infile.get(5);
if (mb == 0 || (MBData[mb_source].quant != quant)) {
outfile.putbits(MBData[mb_source].quant,5);
quant = MBData[mb_source].quant;
}
for(block=0;block<6;block++) {
if (block==0) {
infile.get(infile.get_dcs_y()); // DCT_DC in Eingabestream überspringen
diff = MBData[mb_source].dct_dc_y - dct_dc_y;
dct_dc_y = MBData[mb_source].dct_dc_y;
absval = (diff<0) ? -diff : diff; /* abs(val) */
size = 0;
while (absval) {
absval >>= 1;
size++;
}
outfile.put_dcs_y(size);
absval = diff;
if (absval<=0)
absval += (1<<size) -1;
outfile.putbits(absval,size);
} else if (block>3) {
infile.get(infile.get_dcs_c()); // DCT_DC in Eingabestream überspringen
if (block==4) {
diff = MBData[mb_source].dct_dc_cb - dct_dc_cb;
dct_dc_cb = MBData[mb_source].dct_dc_cb;
} else {
diff = MBData[mb_source].dct_dc_cr - dct_dc_cr;
dct_dc_cr = MBData[mb_source].dct_dc_cr;
}
absval = (diff<0) ? -diff : diff; /* abs(val) */
size = 0;
while (absval) {
absval >>= 1;
size++;
}
outfile.put_dcs_c(size);
absval = diff;
if (absval<=0)
absval += (1<<size) -1;
outfile.putbits(absval,size);
} else {
size = infile.get_dcs_y();
outfile.put_dcs_y(size);
diff = infile.get(size);
outfile.putbits(diff,size); // DCT_DC kopieren (Blöcke 1,2,3)
if (size) {
if (!(diff&(1<<(size - 1))))
diff = (-1 << size) | (diff + 1);
dct_dc_y += diff;
}
}
do {
eob = vlc(1);
if (eob == 0)
outfile.putbits(infile.get(1),1);
} while (eob!=1);
}
}
outfile.putbuf();
infile.setpos(FrameByte,FrameBit);
// Jump to End of Frame
if (!infile.next_start_code()) throw std::runtime_error("End of Stream");
if (infile.get(32) != 0x000001b0) throw std::runtime_error("No 1b0");
}
outfile.putbits(0x1b7,32); // Ende
}
int IPUConv::vlc(int write){
int bits;
int level=0;
bits = infile.get(2);
if (write) outfile.putbits(bits,2);
if(bits == 2)
return(1); // 10 - EOB
if(bits == 3)
return(0); // 11
if(bits == 1) {
bits = infile.get(1);
if (write) outfile.putbits(bits,1);
if (bits)
return(0);
else {
bits = infile.get(1);
if (write) outfile.putbits(bits,1);
return(0);
}
}
// 00
bits = infile.get(1);
if (write) outfile.putbits(bits,1);
if (bits) {
// 001
bits = infile.get(2);
if (write) outfile.putbits(bits,2);
if (bits < 1) {
// 00100
bits = infile.get(3);
if (write) outfile.putbits(bits,3);
}
// 001xx
return(0);
} else {
// 000
bits = infile.get(3);
if (write) outfile.putbits(bits,3);
if(bits >= 4)
return(0);
if(bits >= 2) {
bits = infile.get(1);
if (write) outfile.putbits(bits,1);
return(0);
}
if(bits) {
bits = infile.get(18);
if (write) outfile.putbits(bits,18);
return(2); // Escape
}
bits = infile.get(1);
if (write) outfile.putbits(bits,1);
if(bits) {
bits = infile.get(3);
if (write) outfile.putbits(bits,3);
return(0);
}
do {
bits = infile.get(1);
if (write) outfile.putbits(bits,1);
level++;
} while (!bits && level<6);
if (level<6) {
bits = infile.get(4);
if (write) outfile.putbits(bits,4);
return(0);
} else throw std::runtime_error("Invalid VLC");
}
}
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