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/*
base class for converting raw data(stream) into some frametype.
Copyright (C) 2001 Martin Vogt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation.
For more information look at the file COPYRIGHT in this package
*/
#include "framer.h"
#define PROCESS_FIND 0
#define PROCESS_READ 1
#include <iostream>
using namespace std;
Framer::Framer(int outsize) {
unsigned char* outptr=new unsigned char[outsize];
init(outsize,outptr,true);
}
Framer::Framer(int outsize,unsigned char* outptr) {
if (outptr == NULL) {
cout << "Framer::Framer outptr NULL"<<endl;
exit(0);
}
if (outsize <= 0) {
cout << "Framer::Framer size <= 0"<<endl;
exit(0);
}
init(outsize,outptr,false);
}
void Framer::init(int outsize,unsigned char* outptr,int lDeleteOutPtr) {
buffer_data=outptr;
this->lDeleteOutPtr=lDeleteOutPtr;
input_info=new RawDataBuffer(NULL,0);
buffer_info=new RawDataBuffer(buffer_data,outsize);
lConstruct=true;
reset();
}
Framer::~Framer() {
if (lDeleteOutPtr) {
delete[] buffer_data;
}
delete buffer_info;
delete input_info;
}
int Framer::canStore() {
return buffer_info->untilend();
}
int Framer::restBytes() {
return (input_info->size()-input_info->pos());
}
void Framer::store(unsigned char* start,int bytes) {
if (buffer_info->pos()+bytes > buffer_info->size()) {
cout << "too much bytes inserted. cannot store that"<<endl;
exit(0);
}
if (main_state != FRAME_NEED) {
cout << "cannot store data, when not in MPEGAUDIOFRAME_NEED"<<endl;
exit(0);
}
input_info->set(start,bytes,0);
int fillgrade=input_info->untilend();
if (fillgrade > 0) {
main_state=FRAME_WORK;
}
}
int Framer::work() {
if (main_state != FRAME_WORK) {
cout << "cannot find_frame, when not in MPEGAUDIOFRAME_WORK"<<endl;
exit(0);
}
if (lAutoNext) {
next();
}
switch(process_state) {
case PROCESS_FIND:
if (find_frame(input_info,buffer_info) == true) {
setState(PROCESS_READ);
}
break;
case PROCESS_READ:
if (read_frame(input_info,buffer_info) == true) {
main_state=FRAME_HAS;
}
break;
default:
cout << "unknown process state in work. "<<endl;
printMainStates("printing states");
exit(0);
}
// do not go to NEED if we have a frame and now the input is empty
if (main_state == FRAME_WORK) {
if (input_info->eof()) {
main_state=FRAME_NEED;
}
}
if (main_state == FRAME_HAS) return true;
return false;
}
void Framer::reset() {
unsync(buffer_info,true);
lAutoNext=false;
main_state=FRAME_NEED;
input_info->set(NULL,0,0);
buffer_info->setpos(0);
setState(PROCESS_FIND);
}
void Framer::next() {
unsync(buffer_info,false);
lAutoNext=false;
main_state=FRAME_WORK;
setState(PROCESS_FIND);
}
int Framer::getState() {
int back=main_state;
if (main_state == FRAME_HAS) {
// autonext when we devlivered one frame
lAutoNext=true;
main_state=FRAME_WORK;
setState(PROCESS_FIND);
}
if (lConstruct == true) {
lConstruct=false;
unsync(buffer_info,true);
}
return back;
}
void Framer::setState(int state) {
this->process_state=state;
}
unsigned char* Framer::outdata() {
return buffer_info->ptr();
}
unsigned char* Framer::indata() {
return buffer_info->current();
}
int Framer::len() {
return buffer_info->pos();
}
void Framer::printMainStates(const char* msg) {
cout << msg<<endl;
switch(main_state) {
case FRAME_NEED:
cout << "main_state: FRAME_NEED"<<endl;
break;
case FRAME_WORK:
cout << "main_state: FRAME_WORK"<<endl;
break;
case FRAME_HAS:
cout << "main_state: FRAME_HAS"<<endl;
break;
default:
cout << "unknown illegal main_state:"<<main_state<<endl;
}
switch(process_state) {
case PROCESS_FIND:
cout << "process_state: PROCESS_FIND"<<endl;
break;
case PROCESS_READ:
cout << "process_state: PROCESS_READ"<<endl;
break;
default:
cout << "unknown illegal process_state:"<<process_state<<endl;
}
printPrivateStates();
}
int Framer::find_frame(RawDataBuffer* ,RawDataBuffer* ) {
cout << "direct virtual call Framer::find_frame"<<endl;
return false;
}
int Framer::read_frame(RawDataBuffer* ,RawDataBuffer* ) {
cout << "direct virtual call Framer::read_frame"<<endl;
return false;
}
void Framer::unsync(RawDataBuffer* ,int ) {
if (lConstruct == false) {
// invalidate header in buffer
cout << "direct virtual call Framer::unsync"<<endl;
}
}
void Framer::printPrivateStates() {
cout << "direct virtual call Framer::printPrivateStates"<<endl;
}
void Framer::setRemoteFrameBuffer(unsigned char* outptr,int size) {
input_info->set(NULL,0,0);
buffer_info->set(outptr,size,0);
}
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