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[/] [mb-jpeg/] [tags/] [STEP1_2/] [mb-bmp2jpg/] [huffman.c] - Rev 66
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/* Only encoder This version works correctly, it is tested with testcase.jpg The translation into real huffman codes works. Changed: If huffman wants to send 0xFFxx (FF in one byte) than there must be 0x00 inserted between FF and xx possible fault in finish send: -must it be filled up with zeros? YES -must it be filled up to one bye? or 2 byte? --> in this code there is filled up to 2 bytes, but I (joris) thinks this must be filled up to 1 byte. still dont know - 24-11-05 code clean up - 24-11-05 tables added for color Block numbers: Y = 0 cb =1 cr= 2 */ //--------------------------------------------------------------------------- #include "ejpgl.h" static unsigned int vlc_remaining; static unsigned char vlc_amount_remaining; static unsigned char dcvalue[4]; // 3 is enough int vlc_init_start() { vlc_remaining=0x00; vlc_amount_remaining=0x00; memset(dcvalue, 0, 4); return 0; } int vlc_stop_done() { HuffmanEncodeFinishSend(); } #define vlc_output_byte(c) put_char(c) static unsigned char convertDCMagnitudeCLengthTable[16] = { 0x02, 0x02, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00 }; static unsigned short convertDCMagnitudeCOutTable[16] = { 0x0000, 0x0001, 0x0002, 0x0006, 0x000e, 0x001e, 0x003e, 0x007e, 0x00fe, 0x01fe, 0x03fe, 0x07fe, 0x0000, 0x0000, 0x0000, 0x0000 }; void ConvertDCMagnitudeC(unsigned char magnitude,unsigned short int *out, unsigned short int *lenght) { unsigned char len; /* if ((magnitude>16) || ((len=convertDCMagnitudeCLengthTable[magnitude])==0)) { printf("WAARDE STAAT NIET IN TABEL!!!!!!!!!!!!!!!!!!!!\n"); } */ *lenght = len; *out = convertDCMagnitudeCOutTable[magnitude]; } static unsigned char convertACMagnitudeCLengthTable[256] = { 0x02, 0x02, 0x03, 0x04, 0x05, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, // 00 - 0f 0x00, 0x04, 0x06, 0x08, 0x09, 0x0b, 0x0c, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 10 - 1f 0x00, 0x05, 0x08, 0x0a, 0x0c, 0x0f, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 20 - 2f 0x00, 0x05, 0x08, 0x0a, 0x0c, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 30 - 3f 0x00, 0x06, 0x09, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 40 - 4f 0x00, 0x06, 0x0a, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 50 - 5f 0x00, 0x07, 0x0b, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 60 - 6f 0x00, 0x07, 0x0b, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 70 - 7f 0x00, 0x08, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 80 - 8f 0x00, 0x09, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 90 - 9f 0x00, 0x09, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // a0 - af 0x00, 0x09, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // b0 - bf 0x00, 0x09, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // c0 - cf 0x00, 0x0b, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // d0 - df 0x00, 0x0e, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // e0 - ef 0x0a, 0x0f, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00 }; static unsigned short convertACMagnitudeCOutTable[256] = { 0x0000, 0x0001, 0x0004, 0x000a, 0x0018, 0x0019, 0x0038, 0x0078, 0x01f4, 0x03f6, 0x0ff4, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 00 - 0f 0x0000, 0x000b, 0x0039, 0x00f6, 0x01f5, 0x07f6, 0x0ff5, 0xff88, 0xff89, 0xff8a, 0xff8b, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 10 - 1f 0x0000, 0x001a, 0x00f7, 0x03f7, 0x0ff6, 0x7fc2, 0xff8c, 0xff8d, 0xff8e, 0xff8f, 0xff90, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 20 - 2f 0x0000, 0x001b, 0x00f8, 0x03f8, 0x0ff7, 0xff91, 0xff92, 0xff93, 0xff94, 0xff95, 0xff96, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 30 - 3f 0x0000, 0x003a, 0x01f6, 0xff97, 0xff98, 0xff99, 0xff9a, 0xff9b, 0xff9c, 0xff9d, 0xff9e, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 40 - 4f 0x0000, 0x003b, 0x03f9, 0xff9f, 0xffa0, 0xffa1, 0xFFA2, 0xFFA3, 0xFFA4, 0xFFA5, 0xFFA6, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 50 - 5f 0x0000, 0x0079, 0x07f7, 0xffa7, 0xffa8, 0xffa9, 0xffaa, 0xffab, 0xFFAc, 0xFFAf, 0xFFAe, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 60 - 6f 0x0000, 0x007a, 0x07f8, 0xffaf, 0xffb0, 0xFFB1, 0xFFB2, 0xFFB3, 0xFFB4, 0xFFB5, 0xFFB6, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 70 - 7f 0x0000, 0x00f9, 0xffb7, 0xFFB8, 0xFFB9, 0xFFBa, 0xFFBb, 0xFFBc, 0xFFBd, 0xFFBe, 0xFFBf, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 80 - 8f 0x0000, 0x01f7, 0xffc0, 0xffc1, 0xFFC2, 0xFFC3, 0xFFC4, 0xFFC5, 0xFFC6, 0xFFC7, 0xFFC8, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 90 - 9f 0x0000, 0x01f8, 0xffc9, 0xFFCa, 0xFFCb, 0xFFCc, 0xFFCd, 0xFFCe, 0xFFCf, 0xFFd0, 0xFFd1, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // a0 - af 0x0000, 0x01f9, 0xFFD2, 0xFFD3, 0xFFD4, 0xFFD5, 0xFFD6, 0xFFD7, 0xFFD8, 0xFFD9, 0xFFDa, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // b0 - bf 0x0000, 0x01fa, 0xFFDb, 0xFFDc, 0xFFDd, 0xFFDe, 0xFFDf, 0xFFe0, 0xFFe1, 0xFFe2, 0xFFe3, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // c0 - cf 0x0000, 0x07f9, 0xFFE4, 0xFFE5, 0xFFE6, 0xFFE7, 0xFFE8, 0xFFE9, 0xFFEa, 0xFFEb, 0xFFEc, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // d0 - df 0x0000, 0x3fe0, 0xffed, 0xFFEe, 0xFFEf, 0xFFf0, 0xFFF1, 0xFFF2, 0xFFF3, 0xFFF4, 0xFFF5, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // e0 - ef 0x03fa, 0x7fc3, 0xFFF6, 0xFFF7, 0xFFF8, 0xFFF9, 0xFFFA, 0xFFFB, 0xFFFC, 0xFFFD, 0xFFFE, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }; //=========================================================================== void ConvertACMagnitudeC(unsigned char magnitude,unsigned short int *out, unsigned short int *lenght) { unsigned char len; len = convertACMagnitudeCLengthTable[magnitude]; /* if (!len) { printf("WAARDE STAAT NIET IN TABEL!!!!!!!!!!!!!!!!!!!!\n"); } */ *lenght = len; *out = convertACMagnitudeCOutTable[magnitude]; } static unsigned char convertDCMagnitudeYLengthTable[16] = { 0x02, 0x03, 0x03, 0x03, 0x03, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x00, 0x00, 0x00, 0x00 }; static unsigned short convertDCMagnitudeYOutTable[16] = { 0x0000, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x000e, 0x001e, 0x003e, 0x007e, 0x00fe, 0x01fe, 0x0000, 0x0000, 0x0000, 0x0000 }; //=========================================================================== void ConvertDCMagnitudeY(unsigned char magnitude,unsigned short int *out, unsigned short int *lenght) { unsigned char len; /* if ((magnitude>16) || ((len=convertDCMagnitudeYLengthTable[magnitude])==0)) { printf("WAARDE STAAT NIET IN TABEL!!!!!!!!!!!!!!!!!!!!\n"); } */ *lenght = len; *out = convertDCMagnitudeYOutTable[magnitude]; } static unsigned char convertACMagnitudeYLength[256] = { 0x04, 0x02, 0x02, 0x03, 0x04, 0x05, 0x07, 0x08, 0x0a, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 00 - 0f 0x00, 0x04, 0x05, 0x07, 0x09, 0x0b, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 10 - 1f 0x00, 0x05, 0x08, 0x0a, 0x0c, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 20 - 2f 0x00, 0x06, 0x09, 0x0c, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 30 - 3f 0x00, 0x06, 0x0a, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 40 - 4f 0x00, 0x07, 0x0b, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 50 - 5f 0x00, 0x07, 0x0c, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 60 - 6f 0x00, 0x08, 0x0c, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 70 - 7f 0x00, 0x09, 0x0f, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 80 - 8f 0x00, 0x09, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // 90 - 9f 0x00, 0x09, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // a0 - af 0x00, 0x0a, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // b0 - bf 0x00, 0x0a, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // c0 - cf 0x00, 0x0b, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // d0 - df 0x00, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, // e0 - ef 0x0b, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00 }; static unsigned short convertACMagnitudeYOut[256] = { 0xFFFA, 0xFFF0, 0xFFF1, 0xFFF4, 0xFFFB, 0xFFFA, 0xFFF8, 0xFFF8, 0xFFF6, 0xFF82, 0xFF83, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 00 - 0f 0x0000, 0xFFFC, 0xFFFB, 0xFFF9, 0xFFF6, 0xFFF6, 0xFF84, 0xFF85, 0xFF86, 0xFF87, 0xFF88, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 10 - 1f 0x0000, 0xFFFC, 0xFFF9, 0xFFF7, 0xFFF4, 0xFF89, 0xFF8A, 0xFF8B, 0xFF8C, 0xFF8D, 0xFF8E, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 20 - 2f 0x0000, 0xFFFA, 0xFFF7, 0xFFF5, 0xFF8F, 0xFF90, 0xFF91, 0xFF92, 0xFF93, 0xFF94, 0xFF95, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 30 - 3f 0x0000, 0xFFFB, 0xFFF8, 0xFF96, 0xFF97, 0xFF98, 0xFF99, 0xFF9A, 0xFF9B, 0xFF9C, 0xFF9D, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 40 - 4f 0x0000, 0xFFFA, 0xFFF7, 0xFF9E, 0xFF9F, 0xFFA0, 0xFFA1, 0xFFA2, 0xFFA3, 0xFFA4, 0xFFA5, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 50 - 5f 0x0000, 0xFFFB, 0xFFF6, 0xFFA6, 0xFFA7, 0xFFA8, 0xFFA9, 0xFFAA, 0xFFAB, 0xFFAC, 0xFFAD, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 60 - 6f 0x0000, 0xFFFA, 0xFFF7, 0xFFAE, 0xFFAF, 0xFFB0, 0xFFB1, 0xFFB2, 0xFFB3, 0xFFB4, 0xFFB5, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 70 - 7f 0x0000, 0xFFF8, 0xFFC0, 0xFFB6, 0xFFB7, 0xFFB8, 0xFFB9, 0xFFBA, 0xFFBB, 0xFFBC, 0xFFBD, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 80 - 8f 0x0000, 0xFFF9, 0xFFBE, 0xFFBF, 0xFFC0, 0xFFC1, 0xFFC2, 0xFFC3, 0xFFC4, 0xFFC5, 0xFFC6, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 90 - 9f 0x0000, 0xFFFA, 0xFFC7, 0xFFC8, 0xFFC9, 0xFFCA, 0xFFCB, 0xFFCC, 0xFFCD, 0xFFCE, 0xFFCF, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // a0 - af 0x0000, 0xFFF9, 0xFFD0, 0xFFD1, 0xFFD2, 0xFFD3, 0xFFD4, 0xFFD5, 0xFFD6, 0xFFD7, 0xFFD8, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // b0 - bf 0x0000, 0xFFFA, 0xFFD9, 0xFFDA, 0xFFDB, 0xFFDC, 0xFFDD, 0xFFDE, 0xFFDF, 0xFFE0, 0xFFE1, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // c0 - cf 0x0000, 0xFFF8, 0xFFE2, 0xFFE3, 0xFFE4, 0xFFE5, 0xFFE6, 0xFFE7, 0xFFE8, 0xFFE9, 0xFFEA, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // d0 - df 0x0000, 0xFFEB, 0xFFEC, 0xFFED, 0xFFEE, 0xFFEF, 0xFFF0, 0xFFF1, 0xFFF2, 0xFFF3, 0xFFF4, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // e0 - ef 0xFFF9, 0xFFF5, 0xFFF6, 0xFFF7, 0xFFF8, 0xFFF9, 0xFFFA, 0xFFFB, 0xFFFC, 0xFFFD, 0xFFFE, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }; //=========================================================================== void ConvertACMagnitudeY(unsigned char magnitude,unsigned short int *out, unsigned short int *lenght) { unsigned char len; len = convertACMagnitudeYLength[magnitude]; /* if (!len) { #ifndef __MICROBLAZE printf("WAARDE STAAT NIET IN TABEL!!!!!!!!!!!!!!!!!!!!\n"); #endif } */ *lenght = len; *out = convertACMagnitudeYOut[magnitude]; } char Extend (char additional, unsigned char magnitude) { int vt= 1 << (magnitude-1); if ( additional < vt ) return (additional + (-1 << magnitude) + 1); else return additional; } void ReverseExtend (char value, unsigned char *magnitude, unsigned char *bits) { // printf("reverseextend value= %d\n",*magnitude); if (value >=0) { *bits=value; } else { value=-value; *bits=~value; } *magnitude=0; while (value !=0) { value>>=1; ++*magnitude; } // printf("reverseextend magnitude= %d bits= %d",magnitude,bits); return; } void WriteRawBits16(unsigned char amount_bits, unsigned int bits) //*remaining needs bo be more than 8 bits because 8 bits could be added and ther ecould already be up ot 7 bits in *remaining // this function collects bits to send // if there less than 16 bits collected, nothing is send and these bits are stored in *remaining. In *amount_remaining there is stated how much bits are stored in *remaining // if more than 16 bits are collected, 16 bits are send and the remaining bits are stored again { unsigned short int send; unsigned int mask; unsigned char send2; int count; mask=0x00; //init mask vlc_remaining=(vlc_remaining<<amount_bits); //shift to make place for the new bits for (count=amount_bits; count>0; count--) mask=(mask<<1)|0x01; //create mask for adding bit vlc_remaining=vlc_remaining | (bits&mask); //add bits vlc_amount_remaining=vlc_amount_remaining + amount_bits; //change *amount_remaining to the correct new value if (vlc_amount_remaining >= 16) //are there more than 16 bits in buffer, send 16 bits { /* #ifndef __MICROBLAZE if (vlc_amount_remaining >= 32 ) printf("ERROR, more bits to send %d",vlc_amount_remaining); #endif */ send=vlc_remaining>>(vlc_amount_remaining-16); //this value can be send/stored (in art this can be dony by selecting bits) send2=(send & 0xFF00) >>8; vlc_output_byte(send2); if (send2==0xFF) { send2=0x00; vlc_output_byte(send2); } send2=send & 0xFF; vlc_output_byte(send2); if (send2==0xFF) { send2=0x00; vlc_output_byte(send2); } vlc_amount_remaining=vlc_amount_remaining-16; //descrease by 16 because these are send } return; } void HuffmanEncodeFinishSend() // There are still some bits left to send at the end of the 8x8 matrix (or maybe the file), // the remaining bits are filled up with ones and send // possible fault: -must it be filled up with ones? { unsigned short int send; unsigned int mask; int count; mask=0x00; //init mask if (vlc_amount_remaining >= 8) //2 bytes to send, send first byte { send=vlc_remaining>>(vlc_amount_remaining-8); //shift so that first byte is ready to send vlc_output_byte(send&0xff); if (send==0xFF) //is this still needed???? { send=0x00; vlc_output_byte(send&0xff); } vlc_amount_remaining=vlc_amount_remaining -8; // lower the value to the amount of bits that still needs to be send } if (vlc_amount_remaining >= 0) //there is a last byte to send { send=vlc_remaining<<(8-vlc_amount_remaining); //shift the last bits to send to the front of the byte mask=0x00; //init mask for (count=(8-vlc_amount_remaining); count>0; count--) mask=(mask<<1)|0x01; //create mask to fill byte up with ones send=send | mask; //add the ones to the byte vlc_output_byte(send&0xff); vlc_amount_remaining=0x00; //is this needed? } return; } void HuffmanEncodeUsingDCTable(unsigned char magnitude) // Translate magnitude into needed data (from table) and send it { unsigned char send; unsigned short int huffmancode, huffmanlengt; ConvertDCMagnitudeY(magnitude, &huffmancode, &huffmanlengt); WriteRawBits16(huffmanlengt,huffmancode); //printf("Write DC magnitude= %2x \n",magnitude); //WriteRawBits16(0x08,magnitude,remaining,amount_remaining, file); return; } void HuffmanEncodeUsingACTable(unsigned char mag) // Translate magnitude into needed data (from table) and send it { unsigned char send; unsigned short int huffmancode, huffmanlengt; ConvertACMagnitudeY(mag, &huffmancode, &huffmanlengt); WriteRawBits16(huffmanlengt,huffmancode); return; } char EncodeDataUnit(char dataunit[64], unsigned int color) { char difference; unsigned char magnitude,zerorun,ii,ert; unsigned int bits; unsigned char bit_char; char last_dc_value; //init // PrintMatrix(dataunit) ; last_dc_value = dcvalue[color]; difference = dataunit[0] - last_dc_value; last_dc_value=dataunit[0]; ReverseExtend(difference, &magnitude,&bit_char); bits = bit_char; HuffmanEncodeUsingDCTable(magnitude); WriteRawBits16(magnitude,bits); zerorun=0; ii=1; while ( ii < 64 ) { if (dataunit[ii] != 0 ) { while ( zerorun >= 16 ) { HuffmanEncodeUsingACTable(0xF0); zerorun=zerorun-16; // printf("16 zeros: %d\n",zerorun); } ReverseExtend(dataunit[ii],&magnitude,&bit_char); bits=bit_char; ert= ((int)zerorun *16); //ERROR !!!!!!!!!!! ert=ert + magnitude; HuffmanEncodeUsingACTable(ert); WriteRawBits16(magnitude,bits); zerorun=0; } else zerorun=zerorun+1; ii++; } if ( zerorun != 0 ) { HuffmanEncodeUsingACTable(0x00); } dcvalue[color] = last_dc_value; return 0; }