size = 0;
nal_start = ff_avc_find_startcode(p, end);
- while (nal_start < end) {
- while(!*(nal_start++));
+ for (;;) {
+ while (nal_start < end && !*(nal_start++));
+ if (nal_start == end)
+ break;
+
nal_end = ff_avc_find_startcode(nal_start, end);
avio_wb32(pb, nal_end - nal_start);
avio_write(pb, nal_start, nal_end - nal_start);
end = buf + len;
/* look for sps and pps */
- while (buf < end) {
- unsigned int size;
+ while (end - buf > 4) {
+ uint32_t size;
uint8_t nal_type;
- size = AV_RB32(buf);
- nal_type = buf[4] & 0x1f;
+ size = FFMIN(AV_RB32(buf), end - buf - 4);
+ buf += 4;
+ nal_type = buf[0] & 0x1f;
+
if (nal_type == 7) { /* SPS */
- sps = buf + 4;
+ sps = buf;
sps_size = size;
} else if (nal_type == 8) { /* PPS */
- pps = buf + 4;
+ pps = buf;
pps_size = size;
}
- buf += size + 4;
+
+ buf += size;
}
- assert(sps);
- assert(pps);
+
+ if (!sps || !pps || sps_size < 4 || sps_size > UINT16_MAX || pps_size > UINT16_MAX)
+ return AVERROR_INVALIDDATA;
avio_w8(pb, 1); /* version */
avio_w8(pb, sps[1]); /* profile */