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/*
* Copyright (C) 2013 Open Education Foundation
*
* Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
* l'Education Numérique en Afrique (GIP ENA)
*
* This file is part of OpenBoard.
*
* OpenBoard is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License,
* with a specific linking exception for the OpenSSL project's
* "OpenSSL" library (or with modified versions of it that use the
* same license as the "OpenSSL" library).
*
* OpenBoard is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
*/
#include "UBQuickTimeVideoEncoder.h"
#include <QuickTime/QuickTime.h>
#include <QtGui>
#include "frameworks/UBFileSystemUtils.h"
#include "core/UBApplication.h"
#include "core/UBSettings.h"
#include "core/UBSetting.h"
#include "UBQuickTimeFile.h"
#include "core/memcheck.h"
UBQuickTimeVideoEncoder::UBQuickTimeVideoEncoder(QObject* pParent)
: UBAbstractVideoEncoder(pParent)
, mQuickTimeCompressionSession(0)
, mShouldRecordAudio(true)
{
// NOOP
}
UBQuickTimeVideoEncoder::~UBQuickTimeVideoEncoder()
{
// NOOP
}
bool UBQuickTimeVideoEncoder::start()
{
QString quality = UBSettings::settings()->podcastQuickTimeQuality->get().toString();
if(!mQuickTimeCompressionSession.init(videoFileName(), quality, framesPerSecond(), videoSize()
, mShouldRecordAudio, audioRecordingDevice()))
{
setLastErrorMessage("Cannot init QT compression session" + mQuickTimeCompressionSession.lastErrorMessage());
return false;
}
connect(&mQuickTimeCompressionSession, SIGNAL(compressionFinished()), this, SLOT(compressionFinished()));
connect(&mQuickTimeCompressionSession, SIGNAL(audioLevelChanged(quint8)), this, SIGNAL(audioLevelChanged(quint8)));
mQuickTimeCompressionSession.start();
return true;
}
bool UBQuickTimeVideoEncoder::stop()
{
mQuickTimeCompressionSession.stop();
UBQuickTimeFile::frameBufferNotEmpty.wakeAll();
return true;
}
void UBQuickTimeVideoEncoder::compressionFinished()
{
mLastErrorMessage = mQuickTimeCompressionSession.lastErrorMessage();
emit encodingFinished(mLastErrorMessage.length() > 0);
}
void UBQuickTimeVideoEncoder::newPixmap(const QImage& pImage, long timestamp)
{
//qDebug() << "New Frame at ms" << timestamp;
if(mQuickTimeCompressionSession.isCompressionSessionRunning())
{
if(mPendingImageFrames.length() > 0)
{
foreach(ImageFrame frame, mPendingImageFrames)
{
encodeFrame(frame.image, frame.timestamp);
}
mPendingImageFrames.clear();
}
encodeFrame(pImage, timestamp);
UBQuickTimeFile::frameBufferNotEmpty.wakeAll();
}
else
{
qDebug() << "queuing frame, compressor not ready";
ImageFrame frame;
frame.image = pImage;
frame.timestamp = timestamp;
mPendingImageFrames << frame;
}
}
/**
* \brief Encode QImage into a video frame and add it to the UBQuickTimeFile's queue.
*
* This method retrieves the raw image from the supplied QImage, and uses memcpy to
* dump it into a CVPixelBuffer, obtained through the UBQuickTimeFile member. The
* pixel buffer, along with the timestamp, constitute a video frame which is added
* to the member UBQuickTimeFile's queue.
*/
void UBQuickTimeVideoEncoder::encodeFrame(const QImage& pImage, long timestamp)
{
Q_ASSERT(pImage.format() == QImage::QImage::Format_RGB32); // <=> CVPixelBuffers / k32BGRAPixelFormat
CVPixelBufferRef pixelBuffer = mQuickTimeCompressionSession.newPixelBuffer();
if (!pixelBuffer)
{
setLastErrorMessage("Could not retreive a new pixel buffer");
return;
}
if (CVPixelBufferLockBaseAddress(pixelBuffer, 0) != kCVReturnSuccess)
{
setLastErrorMessage("Could not lock pixel buffer base address");
return;
}
void *pixelBufferAddress = CVPixelBufferGetBaseAddress(pixelBuffer);
if (!pixelBufferAddress)
{
setLastErrorMessage("Could not get pixel buffer base address");
return;
}
const uchar* imageBuffer = pImage.bits();
memcpy((void*) pixelBufferAddress, imageBuffer, pImage.byteCount());
CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);
//qDebug() << "newVideoFrame - PixelBuffer @" << pixelBufferAddress << QTime::currentTime().toString("ss:zzz") << QThread::currentThread();
UBQuickTimeFile::VideoFrame videoFrame;
videoFrame.buffer = pixelBuffer;
videoFrame.timestamp = timestamp;
UBQuickTimeFile::frameQueueMutex.lock();
UBQuickTimeFile::frameQueue.enqueue(videoFrame);
UBQuickTimeFile::frameQueueMutex.unlock();
}
void UBQuickTimeVideoEncoder::setRecordAudio(bool pRecordAudio)
{
mShouldRecordAudio = pRecordAudio;
}