#include "MPEGlist.h"MPEGlist::MPEGlist(){  size = 0;  data = 0;  lock = 0;  next = 0;  prev = 0;  TimeStamp = -1;}MPEGlist::~MPEGlist(){  if(next) next->prev = prev;  if(prev) prev->next = next;  if(data)  {    delete data;    data = 0;  }}/* Return the next free buffer or allocate a new one if none is empty */MPEGlist * MPEGlist::Alloc(Uint32 Buffer_Size){  MPEGlist * tmp;  tmp = next;  next = new MPEGlist;  next->next = tmp;  if ( Buffer_Size ) {    next->data = new Uint8[Buffer_Size];    if(!next->data)    {      fprintf(stderr, "Alloc : Not enough memory\n");      return(0);    }  } else {    next->data = 0;  }  next->size = Buffer_Size;  next->prev = this;  return(next);}/* Lock current buffer */void MPEGlist::Lock(){  lock++;}/* Unlock current buffer */void MPEGlist::Unlock(){  if(lock != 0) lock--;}