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VCM: Adding API for the size(duration) of the jitter buffer.

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Refers to the duration in time of the frames which are ready to be sent to the decoder.

Review URL: https://webrtc-codereview.appspot.com/1319004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3903 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
mikhal@webrtc.org
2013-04-25 21:45:29 +00:00
parent 8392cd9edd
commit 381da4be9c
15 changed files with 469 additions and 160 deletions
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40
webrtc/modules/video_coding/main/source/jitter_buffer.cc
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@ -982,6 +982,46 @@ int64_t VCMJitterBuffer::LastDecodedTimestamp() const {
return last_decoded_state_.time_stamp();
}
int VCMJitterBuffer::RenderBufferSizeMs() {
CriticalSectionScoped cs(crit_sect_);
CleanUpOldOrEmptyFrames();
if (frame_list_.empty()) {
return 0;
}
FrameList::iterator frame_it = frame_list_.begin();
VCMFrameBuffer* current_frame = *frame_it;
// Search for a complete and continuous sequence (starting from the last
// decoded state or current frame if in initial state).
VCMDecodingState previous_state;
if (last_decoded_state_.in_initial_state()) {
// Start with a key frame.
frame_it = find_if(frame_list_.begin(), frame_list_.end(),
CompleteKeyFrameCriteria());
if (frame_it == frame_list_.end()) {
return 0;
}
current_frame = *frame_it;
previous_state.SetState(current_frame);
} else {
previous_state.CopyFrom(last_decoded_state_);
}
bool continuous_complete = true;
int64_t start_render = current_frame->RenderTimeMs();
++frame_it;
while (frame_it != frame_list_.end() && continuous_complete) {
current_frame = *frame_it;
continuous_complete = current_frame->IsSessionComplete() &&
previous_state.ContinuousFrame(current_frame);
previous_state.SetState(current_frame);
++frame_it;
}
// Desired frame is the previous one.
--frame_it;
current_frame = *frame_it;
// Got the frame, now compute the time delta.
return static_cast<int>(current_frame->RenderTimeMs() - start_render);
}
// Set the frame state to free and remove it from the sorted
// frame list. Must be called from inside the critical section crit_sect_.
void VCMJitterBuffer::ReleaseFrameIfNotDecoding(VCMFrameBuffer* frame) {