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descrambler: add a timewindow for the odd/even key change

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This commit is contained in:
Jaroslav Kysela 2014-06-11 14:32:19 +02:00
parent 8391ac5671
commit 33e70e35c2
1 changed files with 4 additions and 2 deletions
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6
src/descrambler/descrambler.c
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@ -272,7 +272,8 @@ descrambler_descramble ( service_t *t,
if (dr->dr_buf.sb_ptr > 0) {
for (off = 0, size = dr->dr_buf.sb_ptr; off < size; off += 188) {
tsb2 = dr->dr_buf.sb_data + off;
if ((tsb2[3] & 0x80) != 0x00 && dr->dr_key_index != (tsb2[3] & 0x40)) {
if ((tsb2[3] & 0x80) != 0x00 && dr->dr_key_index != (tsb2[3] & 0x40) &&
dr->dr_key_start + 2 < dispatch_clock) {
tvhtrace("descrambler", "%s - stream key changed to %s",
((mpegts_service_t *)t)->s_dvb_svcname,
(tsb2[3] & 0x40) ? "odd" : "even");
@ -288,7 +289,8 @@ descrambler_descramble ( service_t *t,
}
sbuf_free(&dr->dr_buf);
}
if ((tsb[3] & 0x80) != 0x00 && dr->dr_key_index != (tsb[3] & 0x40)) {
if ((tsb[3] & 0x80) != 0x00 && dr->dr_key_index != (tsb[3] & 0x40) &&
dr->dr_key_start + 2 < dispatch_clock) {
tvhtrace("descrambler", "%s - stream key changed to %s",
((mpegts_service_t *)t)->s_dvb_svcname,
(tsb[3] & 0x40) ? "odd" : "even");