AVPacket * file_decoder::build_avpkt(AVPacket *avpkt)
{
static unsigned char buffer[1*1024*1024];
static int readptr = 0;
static int writeptr = 0;
int len,toread;
//AVPacket * avpkt = new AVPacket;
//av_init_packet(avpkt);
int nexthead;
if (writeptr - readptr < 200 * 1024)
{
memmove(buffer, &buffer[readptr], writeptr - readptr);
writeptr -= readptr;
readptr = 0;
toread = FILE_READING_BUFFER - writeptr;
len = (int) fread(&buffer[writeptr], 1, toread, fp);
writeptr += len;
}
nexthead = _find_head(&buffer[readptr], writeptr-readptr);
if (nexthead == 0)
{
//printf("failed find next head...\n");
nexthead = writeptr - readptr;
}
avpkt->size = nexthead;
avpkt->data = &buffer[readptr];
readptr += nexthead;
return avpkt;
}
static void build_avpkt(AVPacket *avpkt,FILE *fp)
{
#if 0
int len;
static unsigned char buffer[INBUF_SIZE];
len =fread(buffer, 1, INBUF_SIZE, fp);
avpkt->data = buffer;
avpkt->size = len;
#else
static unsigned char buffer[1*1024*1024];
static int readptr = 0;
static int writeptr = 0;
int len,toread;
int nexthead;
if(writeptr - readptr < 200 * 1024)
{
memmove(buffer, &buffer[readptr], writeptr - readptr);
writeptr -= readptr;
readptr = 0;
toread = FILE_READING_BUFFER - writeptr;
len =fread(&buffer[writeptr], 1, toread, fp);
writeptr += len;
}
nexthead = _find_head(&buffer[readptr], writeptr-readptr);
if(nexthead == 0)
{
printf("failed find next head.../n");
nexthead = writeptr - readptr;
}
avpkt->size = nexthead;
avpkt->data = &buffer[readptr];
readptr += nexthead;
#endif
}
