int av_base64_decode(uint8_t *out, const char *in_str, int out_size)
{
uint8_t *dst = out;
- uint8_t *end = out + out_size;
+ uint8_t *end;
// no sign extension
const uint8_t *in = in_str;
unsigned bits = 0xff;
unsigned v;
+ if (!out)
+ goto validity_check;
+
+ end = out + out_size;
while (end - dst > 3) {
BASE64_DEC_STEP(0);
BASE64_DEC_STEP(1);
*dst++ = v;
in += 4;
}
+validity_check:
while (1) {
BASE64_DEC_STEP(0);
in++;
*dst++ = v >> 4;
out1:
out0:
- return bits & 1 ? AVERROR_INVALIDDATA : dst - out;
+ return bits & 1 ? AVERROR_INVALIDDATA : out ? dst - out : 0;
}
/*****************************************************************************