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RTP video dec.: zero buffer where missing data

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Zero parts of the framebuffer for compressed streams. This should be
safer for decoder when trying to decompress an incomplete frame.
This commit is contained in:
Martin Pulec
2019-09-27 13:18:58 +02:00
parent 9c7b18f117
commit f705331806
1 changed files with 19 additions and 0 deletions
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19
src/rtp/video_decoders.cpp
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@@ -1785,6 +1785,25 @@ next_packet:
frame_size += frame->tiles[i].data_len;
}
/// Zero missing parts of framebuffer for compressed video
/// @todo this can be done also for FEC but not here
if ((pt == PT_VIDEO || pt == PT_ENCRYPT_VIDEO) && decoder->decoder_type != LINE_DECODER) {
for(int i = 0; i < max_substreams; ++i) {
unsigned int last_end = 0;
for (auto const & packets : pckt_list[i]) {
unsigned int start = packets.first;
unsigned int len = packets.second;
if (last_end < start) {
memset(frame->tiles[i].data + last_end, 0, start - last_end);
}
last_end = start + len;
}
if (last_end < frame->tiles[0].data_len) {
memset(frame->tiles[i].data + last_end, 0, frame->tiles[0].data_len - last_end);
}
}
}
// format message
{
unique_ptr <frame_msg> fec_msg (new frame_msg(decoder->control, decoder->stats));