zqz/platform-external-webrtc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

VCM/JB: Using last decoded state for waiting for key

Browse Source 
Review URL: https://webrtc-codereview.appspot.com/1323006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3892 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
mikhal@webrtc.org
2013-04-23 20:57:06 +00:00
parent 3a9a3cdaa2
commit 1248d4effc
4 changed files with 22 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
webrtc/modules/video_coding/main/source/jitter_buffer.cc
View File

@ -105,7 +105,6 @@ VCMJitterBuffer::VCMJitterBuffer(Clock* clock,
nack_seq_nums_(),
max_nack_list_size_(0),
max_packet_age_to_nack_(0),
waiting_for_key_frame_(false),
decode_with_errors_(false) {
memset(frame_buffers_, 0, sizeof(frame_buffers_));
memset(receive_statistics_, 0, sizeof(receive_statistics_));
@ -147,7 +146,6 @@ void VCMJitterBuffer::CopyFrom(const VCMJitterBuffer& rhs) {
inter_frame_delay_ = rhs.inter_frame_delay_;
waiting_for_completion_ = rhs.waiting_for_completion_;
rtt_ms_ = rhs.rtt_ms_;
waiting_for_key_frame_ = rhs.waiting_for_key_frame_;
first_packet_ = rhs.first_packet_;
last_decoded_state_ = rhs.last_decoded_state_;
num_not_decodable_packets_ = rhs.num_not_decodable_packets_;
@ -201,9 +199,9 @@ void VCMJitterBuffer::Start() {
waiting_for_completion_.timestamp = 0;
waiting_for_completion_.latest_packet_time = -1;
first_packet_ = true;
waiting_for_key_frame_ = false;
rtt_ms_ = kDefaultRtt;
num_not_decodable_packets_ = 0;
last_decoded_state_.Reset();
WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceVideoCoding,
VCMId(vcm_id_, receiver_id_), "JB(0x%x): Jitter buffer: start",
@ -441,10 +439,6 @@ VCMEncodedFrame* VCMJitterBuffer::GetCompleteFrameForDecoding(
CleanUpOldOrEmptyFrames();
if (last_decoded_state_.in_initial_state()) {
waiting_for_key_frame_ = true;
}
FrameList::iterator it = FindOldestCompleteContinuousFrame();
if (it == frame_list_.end()) {
const int64_t end_wait_time_ms = clock_->TimeInMilliseconds() +
@ -495,12 +489,6 @@ VCMEncodedFrame* VCMJitterBuffer::GetCompleteFrameForDecoding(
VCMFrameBuffer* oldest_frame = *it;
// Are we waiting for a key frame?
if (waiting_for_key_frame_ && oldest_frame->FrameType() != kVideoFrameKey) {
crit_sect_->Leave();
return NULL;
}
it = frame_list_.erase(it);
if (frame_list_.empty()) {
TRACE_EVENT_INSTANT1("webrtc", "JB::FrameListEmptied",
@ -518,10 +506,6 @@ VCMEncodedFrame* VCMJitterBuffer::GetCompleteFrameForDecoding(
oldest_frame->SetState(kStateDecoding);
if (oldest_frame->FrameType() == kVideoFrameKey) {
waiting_for_key_frame_ = false;
}
// We have a frame - update decoded state with frame info.
last_decoded_state_.SetState(oldest_frame);
DropPacketsFromNackList(last_decoded_state_.sequence_num());
@ -553,6 +537,12 @@ VCMEncodedFrame* VCMJitterBuffer::GetFrameForDecoding() {
return NULL;
}
// Always start with a key frame.
if (last_decoded_state_.in_initial_state() &&
oldest_frame->FrameType() != kVideoFrameKey) {
return NULL;
}
// Incomplete frame pulled out from jitter buffer,
// update the jitter estimate with what we currently know.
// This frame shouldn't have been retransmitted, but if we recently
@ -587,10 +577,6 @@ VCMEncodedFrame* VCMJitterBuffer::GetFrameForDecoding() {
// Set as decoding. Propagates the missing_frame bit.
oldest_frame->SetState(kStateDecoding);
if (oldest_frame->FrameType() == kVideoFrameKey) {
waiting_for_key_frame_ = false;
}
num_not_decodable_packets_ += oldest_frame->NotDecodablePackets();
// We have a frame - update decoded state with frame info.
@ -1004,9 +990,6 @@ VCMEncodedFrame* VCMJitterBuffer::GetFrameForDecodingNACK() {
// First look for a complete continuous frame.
// When waiting for nack, wait for a key frame, if a continuous frame cannot
// be determined (i.e. initial decoding state).
if (last_decoded_state_.in_initial_state()) {
waiting_for_key_frame_ = true;
}
FrameList::iterator it = FindOldestCompleteContinuousFrame();
if (it == frame_list_.end()) {
// If we didn't find one we're good with a complete key frame.
@ -1017,6 +1000,7 @@ VCMEncodedFrame* VCMJitterBuffer::GetFrameForDecodingNACK() {
}
}
VCMFrameBuffer* oldest_frame = *it;
// Update jitter estimate
const bool retransmitted = (oldest_frame->GetNackCount() > 0);
if (retransmitted) {
@ -1039,10 +1023,6 @@ VCMEncodedFrame* VCMJitterBuffer::GetFrameForDecodingNACK() {
// decoder.
oldest_frame->SetState(kStateDecoding);
if (oldest_frame->FrameType() == kVideoFrameKey) {
waiting_for_key_frame_ = false;
}
// We have a frame - update decoded state with frame info.
last_decoded_state_.SetState(oldest_frame);
DropPacketsFromNackList(last_decoded_state_.sequence_num());
@ -1120,7 +1100,6 @@ bool VCMJitterBuffer::RecycleFramesUntilKeyFrame() {
TRACE_EVENT_INSTANT1("webrtc", "JB::FrameListEmptied",
"type", "RecycleFramesUntilKeyFrame");
}
waiting_for_key_frame_ = true;
last_decoded_state_.Reset(); // TODO(mikhal): No sync.
missing_sequence_numbers_.clear();
return false;
@ -1262,11 +1241,8 @@ FrameList::iterator VCMJitterBuffer::FindOldestCompleteContinuousFrame() {
if (oldest_frame == NULL) {
// No complete frame no point to continue.
return frame_list_.end();
} else if (waiting_for_key_frame_ &&
oldest_frame->FrameType() != kVideoFrameKey) {
// We are waiting for a key frame.
return frame_list_.end();
}
// We have a complete continuous frame.
return it;
}