c75102eba7
BUG=314 Review URL: https://webrtc-codereview.appspot.com/1307005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@3797 4adac7df-926f-26a2-2b94-8c16560cd09d
131 lines
4.0 KiB
C++
131 lines
4.0 KiB
C++
/*
|
|
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "video_frames_queue.h"
|
|
|
|
#ifdef WEBRTC_MODULE_UTILITY_VIDEO
|
|
|
|
#include <cassert>
|
|
|
|
#include "module_common_types.h"
|
|
#include "tick_util.h"
|
|
#include "trace.h"
|
|
|
|
namespace webrtc {
|
|
VideoFramesQueue::VideoFramesQueue()
|
|
: _incomingFrames(),
|
|
_renderDelayMs(10)
|
|
{
|
|
}
|
|
|
|
VideoFramesQueue::~VideoFramesQueue() {
|
|
while (!_incomingFrames.Empty()) {
|
|
ListItem* item = _incomingFrames.First();
|
|
if (item) {
|
|
I420VideoFrame* ptrFrame = static_cast<I420VideoFrame*>(item->GetItem());
|
|
assert(ptrFrame != NULL);
|
|
delete ptrFrame;
|
|
}
|
|
_incomingFrames.Erase(item);
|
|
}
|
|
while (!_emptyFrames.Empty()) {
|
|
ListItem* item = _emptyFrames.First();
|
|
if (item) {
|
|
I420VideoFrame* ptrFrame =
|
|
static_cast<I420VideoFrame*>(item->GetItem());
|
|
assert(ptrFrame != NULL);
|
|
delete ptrFrame;
|
|
}
|
|
_emptyFrames.Erase(item);
|
|
}
|
|
}
|
|
|
|
int32_t VideoFramesQueue::AddFrame(const I420VideoFrame& newFrame) {
|
|
I420VideoFrame* ptrFrameToAdd = NULL;
|
|
// Try to re-use a VideoFrame. Only allocate new memory if it is necessary.
|
|
if (!_emptyFrames.Empty()) {
|
|
ListItem* item = _emptyFrames.First();
|
|
if (item) {
|
|
ptrFrameToAdd = static_cast<I420VideoFrame*>(item->GetItem());
|
|
_emptyFrames.Erase(item);
|
|
}
|
|
}
|
|
if (!ptrFrameToAdd) {
|
|
if (_emptyFrames.GetSize() + _incomingFrames.GetSize() >
|
|
KMaxNumberOfFrames) {
|
|
WEBRTC_TRACE(kTraceWarning, kTraceVideoRenderer, -1,
|
|
"%s: too many frames, limit: %d", __FUNCTION__,
|
|
KMaxNumberOfFrames);
|
|
return -1;
|
|
}
|
|
|
|
WEBRTC_TRACE(kTraceMemory, kTraceVideoRenderer, -1,
|
|
"%s: allocating buffer %d", __FUNCTION__,
|
|
_emptyFrames.GetSize() + _incomingFrames.GetSize());
|
|
|
|
ptrFrameToAdd = new I420VideoFrame();
|
|
if (!ptrFrameToAdd) {
|
|
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, -1,
|
|
"%s: could not create new frame for", __FUNCTION__);
|
|
return -1;
|
|
}
|
|
}
|
|
ptrFrameToAdd->CopyFrame(newFrame);
|
|
_incomingFrames.PushBack(ptrFrameToAdd);
|
|
return 0;
|
|
}
|
|
|
|
// Find the most recent frame that has a VideoFrame::RenderTimeMs() that is
|
|
// lower than current time in ms (TickTime::MillisecondTimestamp()).
|
|
// Note _incomingFrames is sorted so that the oldest frame is first.
|
|
// Recycle all frames that are older than the most recent frame.
|
|
I420VideoFrame* VideoFramesQueue::FrameToRecord() {
|
|
I420VideoFrame* ptrRenderFrame = NULL;
|
|
ListItem* item = _incomingFrames.First();
|
|
while(item) {
|
|
I420VideoFrame* ptrOldestFrameInList =
|
|
static_cast<I420VideoFrame*>(item->GetItem());
|
|
if (ptrOldestFrameInList->render_time_ms() <=
|
|
TickTime::MillisecondTimestamp() + _renderDelayMs) {
|
|
if (ptrRenderFrame) {
|
|
// List is traversed beginning to end. If ptrRenderFrame is not
|
|
// NULL it must be the first, and thus oldest, VideoFrame in the
|
|
// queue. It can be recycled.
|
|
ReturnFrame(ptrRenderFrame);
|
|
_incomingFrames.PopFront();
|
|
}
|
|
item = _incomingFrames.Next(item);
|
|
ptrRenderFrame = ptrOldestFrameInList;
|
|
} else {
|
|
// All VideoFrames following this one will be even newer. No match
|
|
// will be found.
|
|
break;
|
|
}
|
|
}
|
|
return ptrRenderFrame;
|
|
}
|
|
|
|
int32_t VideoFramesQueue::ReturnFrame(I420VideoFrame* ptrOldFrame) {
|
|
ptrOldFrame->set_timestamp(0);
|
|
ptrOldFrame->set_width(0);
|
|
ptrOldFrame->set_height(0);
|
|
ptrOldFrame->set_render_time_ms(0);
|
|
ptrOldFrame->ResetSize();
|
|
_emptyFrames.PushBack(ptrOldFrame);
|
|
return 0;
|
|
}
|
|
|
|
int32_t VideoFramesQueue::SetRenderDelay(uint32_t renderDelay) {
|
|
_renderDelayMs = renderDelay;
|
|
return 0;
|
|
}
|
|
} // namespace webrtc
|
|
#endif // WEBRTC_MODULE_UTILITY_VIDEO
|