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Fixed bug in PacketBuffer to correctly detect new complete frames after ClearTo has been called.

Browse Source 
BUG=webrtc:5514
R=stefan@webrtc.org, terelius@webrtc.org

Review URL: https://codereview.webrtc.org/2527903002 .

Cr-Commit-Position: refs/heads/master@{#15269}
This commit is contained in:
philipel
2016-11-28 16:14:57 +01:00
parent e1a13f8b3c
commit 20dce34578
2 changed files with 17 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
webrtc/modules/video_coding/packet_buffer.cc
View File

@ -172,16 +172,8 @@ bool PacketBuffer::PotentialNewFrame(uint16_t seq_num) const {
return false;
if (sequence_buffer_[index].frame_created)
return false;
if (sequence_buffer_[index].frame_begin &&
(!sequence_buffer_[prev_index].used ||
AheadOf(seq_num, sequence_buffer_[prev_index].seq_num))) {
// The reason we only return true if this packet is the first packet of the
// frame and the sequence number is newer than the packet with the previous
// index is because we want to avoid an inifite loop in the case where
// a single frame containing more packets than the current size of the
// packet buffer is inserted.
if (sequence_buffer_[index].frame_begin)
return true;
}
if (!sequence_buffer_[prev_index].used)
return false;
if (sequence_buffer_[prev_index].seq_num !=
@ -197,7 +189,8 @@ bool PacketBuffer::PotentialNewFrame(uint16_t seq_num) const {
std::vector<std::unique_ptr<RtpFrameObject>> PacketBuffer::FindFrames(
uint16_t seq_num) {
std::vector<std::unique_ptr<RtpFrameObject>> found_frames;
while (PotentialNewFrame(seq_num)) {
size_t packets_tested = 0;
while (packets_tested < size_ && PotentialNewFrame(seq_num)) {
size_t index = seq_num % size_;
sequence_buffer_[index].continuous = true;
@ -229,6 +222,7 @@ std::vector<std::unique_ptr<RtpFrameObject>> PacketBuffer::FindFrames(
max_nack_count, clock_->TimeInMilliseconds()));
}
++seq_num;
++packets_tested;
}
return found_frames;
}

13
webrtc/modules/video_coding/video_packet_buffer_unittest.cc
View File

@ -425,5 +425,18 @@ TEST_F(TestPacketBuffer, InvalidateFrameByClearing) {
EXPECT_FALSE(frames_from_callback_.begin()->second->GetBitstream(nullptr));
}
TEST_F(TestPacketBuffer, FramesAfterClear) {
Insert(9025, kDeltaFrame, kFirst, kLast);
Insert(9024, kKeyFrame, kFirst, kLast);
packet_buffer_->ClearTo(9025);
Insert(9057, kDeltaFrame, kFirst, kLast);
Insert(9026, kDeltaFrame, kFirst, kLast);
CheckFrame(9024);
CheckFrame(9025);
CheckFrame(9026);
CheckFrame(9057);
}
} // namespace video_coding
} // namespace webrtc