305 lines
8 KiB
C++
305 lines
8 KiB
C++
#include<theora.h>
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#include<stdlib.h>
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#include<string.h>
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#include <arpa/inet.h>
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#include <sstream>
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namespace theora{
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bool header::checkDataSize(unsigned int size){
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if (size > datasize){
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void* tmp = realloc(data,size);
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if (tmp){
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data = (char*)tmp;
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datasize = size;
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return true;
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}else{
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return false;
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}
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}else{
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return true;
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}
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}
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uint32_t header::getInt32(size_t index){
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if (datasize >= (index + 3)){
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return (data[index] << 24) + (data[index + 1] << 16) + (data[index + 2] << 8) + data[index + 3];
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}
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return 0;
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}
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uint32_t header::getInt24(size_t index){
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if (datasize >= (index + 2)){
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return 0 + (data[index] << 16) + (data[index + 1] << 8) + data[index + 2];
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}
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return 0;
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}
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uint16_t header::getInt16(size_t index){
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if (datasize >= (index + 1)){
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return 0 + (data[index] << 8) + data[index + 1];
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}
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return 0;
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}
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uint32_t header::commentLen(size_t index){
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if (datasize >= index + 3){
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return data[index] + (data[index + 1] << 8) + (data[index + 2] << 16) + (data[index + 3] << 24);
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}
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return 0;
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}
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header::header(){
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data = NULL;
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datasize = 0;
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}
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bool header::validateIdentificationHeader(){
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if (datasize != 42){return false;}
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if (getHeaderType() != 0){return false;}
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if (getVMAJ() != 3){return false;}
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if (getVMIN() != 2){return false;}
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if (getFMBW() == 0){return false;}
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if (getFMBH() == 0){return false;}
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if (getPICW() > getFMBW() * 16){return false;}
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if (getPICH() > getFMBH() * 16){return false;}
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if (getPICX() > (getFMBW() * 16) - getPICW()){return false;}
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if (getPICY() > (getFMBH() * 16) - getPICH()){return false;}
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if (getFRN() == 0){return false;}
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if (getFRD() == 0){return false;}
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return true;
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}
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bool header::read(char* newData, unsigned int length){
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if (length < 7){
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return false;
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}
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if (! (newData[0] & 0x80)){
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return false;
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}
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if(memcmp(newData+1, "theora", 6)!=0){
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return false;
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}
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if (checkDataSize(length)){
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memcpy(data, newData, length);
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}else{
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return false;
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}
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switch(getHeaderType()){
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case 0:
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return validateIdentificationHeader();
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break;
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case 1:
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///\todo Read Comment header
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break;
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case 2:
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///\todo Read Setup Header
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break;
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}
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return true;
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}
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int header::getHeaderType(){
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return (data[0] & 0x7F);
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}
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char header::getVMAJ(){
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if (getHeaderType() == 0){return data[7];}
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return 0;
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}
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char header::getVMIN(){
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if (getHeaderType() == 0){return data[8];}
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return 0;
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}
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char header::getVREV(){
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if (getHeaderType() == 0){return data[9];}
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return 0;
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}
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short header::getFMBW(){
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if (getHeaderType() == 0){return getInt16(10);}
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return 0;
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}
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short header::getFMBH(){
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if (getHeaderType() == 0){return getInt16(12);}
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return 0;
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}
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char header::getPICX(){
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if (getHeaderType() == 0){return data[20];}
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return 0;
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}
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char header::getPICY(){
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if (getHeaderType() == 0){return data[21];}
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return 0;
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}
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char header::getKFGShift(){
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if (getHeaderType() == 0){return (getInt16(40) >> 5) & 0x1F;}
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return 0;
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}
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long unsigned int header::getFRN(){
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if (getHeaderType() == 0){return getInt32(22);}
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return 0;
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}
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long unsigned int header::getPICH(){
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if (getHeaderType() == 0){return getInt24(17);}
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return 0;
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}
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long unsigned int header::getPICW(){
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if (getHeaderType() == 0){return getInt24(14);}
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return 0;
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}
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long unsigned int header::getFRD(){
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if (getHeaderType() == 0){return getInt32(26);}
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return 0;
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}
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long unsigned int header::getPARN(){
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if (getHeaderType() == 0){return getInt24(30);}
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return 0;
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}
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long unsigned int header::getPARD(){
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if (getHeaderType() == 0){return getInt24(33);}
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return 0;
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}
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char header::getCS(){
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if (getHeaderType() == 0){return data[36];}
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return 0;
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}
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long unsigned int header::getNOMBR(){
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if (getHeaderType() == 0){return getInt24(37);}
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return 0;
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}
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char header::getQUAL(){
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if (getHeaderType() == 0){return (data[40] >> 3) & 0x1F;}
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return 0;
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}
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char header::getPF(){
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if (getHeaderType() == 0){return (data[41] >> 3) & 0x03;}
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return 0;
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}
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std::string header::getVendor(){
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if (getHeaderType() != 1){return "";}
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return std::string(data + 11, commentLen(7));
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}
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long unsigned int header::getNComments(){
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if (getHeaderType() != 1){return 0;}
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int offset = 11 + commentLen(7);
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return commentLen(offset);
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}
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std::string header::getUserComment(size_t index){
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if (index >= getNComments()){return "";}
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int len;
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int offset = 11 + commentLen(7) + 4;
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for (int i = 0; i < index; i++){
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offset += 4 + commentLen(offset);
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}
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return std::string(data + offset + 4,commentLen(offset));
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}
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std::string header::toPrettyString(size_t indent){
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std::stringstream result;
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result << std::string(indent,' ') << "Theora header" << std::endl;
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result << std::string(indent+2,' ') << "HeaderType: " << getHeaderType() << std::endl;
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switch (getHeaderType()){
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case 0:
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result << std::string(indent+2,' ') << "VMAJ: " << (int)getVMAJ() << std::endl;
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result << std::string(indent+2,' ') << "VMIN: " << (int)getVMIN() << std::endl;
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result << std::string(indent+2,' ') << "VREV: " << (int)getVREV() << std::endl;
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result << std::string(indent+2,' ') << "FMBW: " << getFMBW() << std::endl;
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result << std::string(indent+2,' ') << "FMBH: " << getFMBH() << std::endl;
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result << std::string(indent+2,' ') << "PICH: " << getPICH() << std::endl;
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result << std::string(indent+2,' ') << "PICW: " << getPICW() << std::endl;
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result << std::string(indent+2,' ') << "PICX: " << (int)getPICX() << std::endl;
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result << std::string(indent+2,' ') << "PICY: " << (int)getPICY() << std::endl;
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result << std::string(indent+2,' ') << "FRN: " << getFRN() << std::endl;
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result << std::string(indent+2,' ') << "FRD: " << getFRD() << std::endl;
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result << std::string(indent+2,' ') << "PARN: " << getPARN() << std::endl;
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result << std::string(indent+2,' ') << "PARD: " << getPARD() << std::endl;
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result << std::string(indent+2,' ') << "CS: " << (int)getCS() << std::endl;
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result << std::string(indent+2,' ') << "NOMBR: " << getNOMBR() << std::endl;
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result << std::string(indent+2,' ') << "QUAL: " << (int)getQUAL() << std::endl;
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result << std::string(indent+2,' ') << "KFGShift: " << (int)getKFGShift() << std::endl;
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break;
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case 1:
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result << std::string(indent+2,' ') << "Vendor: " << getVendor() << std::endl;
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result << std::string(indent+2,' ') << "User Comments (" << getNComments() << "):" << std::endl;
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for (int i = 0; i < getNComments(); i++){
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result << std::string(indent+4,' ') << "[" << i << "] " << getUserComment(i) << std::endl;
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}
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break;
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}
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return result.str();
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}
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frame::frame(){
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data = NULL;
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datasize = 0;
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}
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bool frame::checkDataSize(unsigned int size){
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if (size > datasize){
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void* tmp = realloc(data,size);
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if (tmp){
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data = (char*)tmp;
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datasize = size;
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return true;
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}else{
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return false;
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}
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}else{
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return true;
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}
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}
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bool frame::read(char* newData, unsigned int length){
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if (length < 7){
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return false;
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}
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if ((newData[0] & 0x80)){
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return false;
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}
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if (checkDataSize(length)){
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memcpy(data, newData, length);
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}else{
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return false;
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}
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return true;
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}
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char frame::getFTYPE(){
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return (data[0] >> 6) & 0x01;
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}
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char frame::getNQIS(){
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return 0;
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}
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char frame::getQIS(size_t index){
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if (index >= 3){return 0;}
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return 0;
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}
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std::string frame::toPrettyString(size_t indent){
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std::stringstream result;
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result << std::string(indent,' ') << "Theora Frame" << std::endl;
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result << std::string(indent+2,' ') << "FType: " << (int)getFTYPE() << std::endl;
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return result.str();
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}
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}
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