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Add one unit test for NACKing a key frame

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Adding a test case that wasn't covered. This new test is passing.

R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1475004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4051 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
hclam@chromium.org
2013-05-16 21:19:59 +00:00
parent b3e5acfb66
commit fe307e1332
2 changed files with 33 additions and 0 deletions
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7
webrtc/modules/video_coding/main/source/jitter_buffer.cc
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@@ -844,6 +844,9 @@ uint16_t VCMJitterBuffer::EstimatedLowSequenceNumber(
assert(frame.GetLowSeqNum() >= 0);
if (frame.HaveFirstPacket())
return frame.GetLowSeqNum();
// This estimate is not accurate if more than one packet with lower sequence
// number is lost.
return frame.GetLowSeqNum() - 1;
}
@@ -895,6 +898,8 @@ uint16_t* VCMJitterBuffer::GetNackList(uint16_t* nack_list_size,
} else {
// Skip to the last key frame. If it's incomplete we will start
// NACKing it.
// Note that the estimated low sequence number is correct for VP8
// streams because only the first packet of a key frame is marked.
last_decoded_state_.Reset();
DropPacketsFromNackList(EstimatedLowSequenceNumber(**rit));
}
@@ -1129,6 +1134,8 @@ bool VCMJitterBuffer::RecycleFramesUntilKeyFrame() {
if (it != frame_list_.end() && (*it)->FrameType() == kVideoFrameKey) {
// Reset last decoded state to make sure the next frame decoded is a key
// frame, and start NACKing from here.
// Note that the estimated low sequence number is correct for VP8
// streams because only the first packet of a key frame is marked.
last_decoded_state_.Reset();
DropPacketsFromNackList(EstimatedLowSequenceNumber(**it));
return true;

26
webrtc/modules/video_coding/main/source/jitter_buffer_unittest.cc
View File

@@ -1674,6 +1674,32 @@ TEST_F(TestJitterBufferNack, UseNackToRecoverFirstKeyFrame) {
EXPECT_EQ(packet.seqNum, list[0]);
}
TEST_F(TestJitterBufferNack, UseNackToRecoverFirstKeyFrameSecondInQueue) {
VCMPacket packet;
stream_generator_->Init(0, 0, clock_->TimeInMilliseconds());
// First frame is delta.
stream_generator_->GenerateFrame(kVideoFrameDelta, 3, 0,
clock_->TimeInMilliseconds());
EXPECT_EQ(kFirstPacket, InsertPacketAndPop(0));
// Drop second packet in frame.
ASSERT_TRUE(stream_generator_->PopPacket(&packet, 0));
EXPECT_EQ(kIncomplete, InsertPacketAndPop(0));
// Second frame is key.
stream_generator_->GenerateFrame(kVideoFrameKey, 3, 0,
clock_->TimeInMilliseconds() + 10);
EXPECT_EQ(kFirstPacket, InsertPacketAndPop(0));
// Drop second packet in frame.
EXPECT_EQ(kIncomplete, InsertPacketAndPop(1));
EXPECT_FALSE(DecodeCompleteFrame());
uint16_t nack_list_size = 0;
bool extended = false;
uint16_t* list = jitter_buffer_->GetNackList(&nack_list_size, &extended);
EXPECT_EQ(1, nack_list_size);
ASSERT_TRUE(list != NULL);
stream_generator_->GetPacket(&packet, 0);
EXPECT_EQ(packet.seqNum, list[0]);
}
TEST_F(TestJitterBufferNack, NormalOperation) {
EXPECT_EQ(kNack, jitter_buffer_->nack_mode());
jitter_buffer_->DecodeWithErrors(true);