/*   File: astream.cc   By: Alex Theo de Jong   Created: February 1996*/#include <stdio.h>#include <fstream.h>#include <sys/time.h>#include <unistd.h>#include "athread.hh"#include "error.hh"#include "debug.hh"#include "util.hh"#include "sync.hh"#include "mpeg2const.hh"#include "mpeg2buff.hh"#include "astream.hh"/* * * AudioStream * */AudioStream::AudioStream(const char *filename) :  word(0),  frames(0), bitindex(0), file(True), bytes(0){  inputstream=new Mpeg2Input(filename, 8196);  sync=0;}AudioStream::AudioStream(Mpeg2Buffer* input, Synchronization* s) :  word(0), frames(0), bitindex(0), file(False), bytes(0){  if (!(inputstream=input)){    error("no audio input buffer");    athr_exit(0);  }  sync=s;}AudioStream::~AudioStream(void){  if (inputstream) inputstream->close();  if (file) delete inputstream;}#if DEBUGunsigned int AudioStream::get_bits(int n){   for (; bytes && bitindex <= 24; bitindex += 8, bytes--)    word|=(inputstream->getbyte() << (24 - bitindex));  value=0;  value=(word >> (32-n));  bitindex-=n;  word<<=n;  return value;}bool AudioStream::get_header(unsigned int& headerstring){  TRACER("bool AudioStream::get_header(unsigned int& headerstring)");  if (bytes) inputstream->skipbytes(bytes);  if (sync) sync->usedbytes(2, 4);  // 2 is audio ID, 4 is number of bytes  if (inputstream->waitforbytes(4)!=4){    TRACER("audio stream failed - exit");    athr_exit(0);    return False;  }  headerstring=inputstream->getbits32();  inputstream->signal_buffer();  while (((headerstring & 0xfff00000)!=0xfff00000) ){    // In search mode for next header    if (inputstream->waitforbytes(1)!=1){      TRACER("audio stream failed - exit");      athr_exit(0);      return False;    }    headerstring<<=8;    headerstring|=(inputstream->getbyte() & 0x000000ff);    inputstream->signal_buffer();  }  return (headerstring) ? True : False;}bool AudioStream::read_frame(int bytesize){  if ((bytes=inputstream->waitforbytes(bytesize))!=bytesize){    TRACER("audio stream failed - exit");    athr_exit(0);    return False;  }  if (sync) sync->usedbytes(2, bytesize);  // 2 is audio ID, bytesize is number of bytes  frames++;  bitindex=0;  return True;}#endif