int print_picture(FILE* file, unsigned char *buf, int size)
{
unsigned char *ptdeb, *ptcur = buf;
int sizein;
if (!is_huffman(buf)) {
ptdeb = ptcur = buf;
while (((ptcur[0] << 8) | ptcur[1]) != 0xffc0)
ptcur++;
sizein = ptcur - ptdeb;
if( fwrite(buf, sizein, 1, file) <= 0) return -1;
//printf();
if( fwrite(dht_data, DHT_SIZE, 1, file) <= 0) return -1;
if( fwrite(ptcur, size - sizein, 1, file) <= 0) return -1;
} else {
if( fwrite(ptcur, size, 1, file) <= 0) return -1; /* ptcur was uninit -wsr */
}
return 0;
｝
akumar 于 2014-08-11 14:24:52发表:
int is_huffman(unsigned char *buf)
{
unsigned char *ptbuf;
int i = 0;
ptbuf = buf;
while (((ptbuf[0] << 8) | ptbuf[1]) != 0xffda) {
if (i++ > 2048)
return 0;
if (((ptbuf[0] << 8) | ptbuf[1]) == 0xffc4)
return 1;
ptbuf++;
}
return 0;
}还有这段
akumar 于 2014-08-11 14:14:25发表:
这段代码理解不了啊，有什么作用，哪个大神可以教下