1 files changed, 437 insertions, 0 deletions
diff --git a/src/plugins/directshow/player/directshowsamplescheduler.cpp b/src/plugins/directshow/player/directshowsamplescheduler.cpp
new file mode 100644
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+++ b/src/plugins/directshow/player/directshowsamplescheduler.cpp
@@ -0,0 +1,437 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "directshowsamplescheduler.h"
+
+#include <QtCore/qcoreapplication.h>
+#include <QtCore/qcoreevent.h>
+
+class DirectShowTimedSample
+{
+public:
+    DirectShowTimedSample(IMediaSample *sample)
+        : m_next(0)
+        , m_sample(sample)
+        , m_cookie(0)
+        , m_lastSample(false)
+    {
+        m_sample->AddRef();
+    }
+
+    ~DirectShowTimedSample()
+    {
+        m_sample->Release();
+    }
+
+    IMediaSample *sample() const { return m_sample; }
+
+    DirectShowTimedSample *nextSample() const { return m_next; }
+    void setNextSample(DirectShowTimedSample *sample) { Q_ASSERT(!m_next); m_next = sample; }
+
+    DirectShowTimedSample *remove() {
+        DirectShowTimedSample *next = m_next; delete this; return next; }
+
+    bool schedule(IReferenceClock *clock, REFERENCE_TIME startTime, HANDLE handle);
+    void unschedule(IReferenceClock *clock);
+
+    bool isReady(IReferenceClock *clock) const;
+
+    bool isLast() const { return m_lastSample; }
+    void setLast() { m_lastSample = true; }
+
+private:
+    DirectShowTimedSample *m_next;
+    IMediaSample *m_sample;
+    DWORD_PTR m_cookie;
+    bool m_lastSample;
+};
+
+bool DirectShowTimedSample::schedule(
+        IReferenceClock *clock, REFERENCE_TIME startTime, HANDLE handle)
+{
+    REFERENCE_TIME sampleStartTime;
+    REFERENCE_TIME sampleEndTime;
+    if (m_sample->GetTime(&sampleStartTime, &sampleEndTime) == S_OK) {
+        if (clock->AdviseTime(
+                startTime, sampleStartTime, reinterpret_cast<HEVENT>(handle), &m_cookie) == S_OK) {
+            return true;
+        }
+    }
+    return false;
+}
+
+void DirectShowTimedSample::unschedule(IReferenceClock *clock)
+{
+    clock->Unadvise(m_cookie);
+}
+
+bool DirectShowTimedSample::isReady(IReferenceClock *clock) const
+{
+    REFERENCE_TIME sampleStartTime;
+    REFERENCE_TIME sampleEndTime;
+    REFERENCE_TIME currentTime;
+    if (m_sample->GetTime(&sampleStartTime, &sampleEndTime) == S_OK) {
+        if (clock->GetTime(&currentTime) == S_OK)
+            return currentTime >= sampleStartTime;
+    }
+    return true;
+}
+
+DirectShowSampleScheduler::DirectShowSampleScheduler(IUnknown *pin, QObject *parent)
+    : QObject(parent)
+    , m_pin(pin)
+    , m_clock(0)
+    , m_allocator(0)
+    , m_head(0)
+    , m_tail(0)
+    , m_maximumSamples(1)
+    , m_state(Stopped)
+    , m_startTime(0)
+    , m_timeoutEvent(::CreateEvent(0, 0, 0, 0))
+    , m_flushEvent(::CreateEvent(0, 0, 0, 0))
+{
+    m_semaphore.release(m_maximumSamples);
+}
+
+DirectShowSampleScheduler::~DirectShowSampleScheduler()
+{
+    ::CloseHandle(m_timeoutEvent);
+    ::CloseHandle(m_flushEvent);
+
+    Q_ASSERT(!m_clock);
+    Q_ASSERT(!m_allocator);
+}
+
+HRESULT DirectShowSampleScheduler::QueryInterface(REFIID riid, void **ppvObject)
+{
+    return m_pin->QueryInterface(riid, ppvObject);
+}
+
+ULONG DirectShowSampleScheduler::AddRef()
+{
+    return m_pin->AddRef();
+}
+
+ULONG DirectShowSampleScheduler::Release()
+{
+    return m_pin->Release();
+}
+
+// IMemInputPin
+HRESULT DirectShowSampleScheduler::GetAllocator(IMemAllocator **ppAllocator)
+{
+    if (!ppAllocator) {
+        return E_POINTER;
+    } else {
+        QMutexLocker locker(&m_mutex);
+
+        if (!m_allocator) {
+            return VFW_E_NO_ALLOCATOR;
+        } else {
+            *ppAllocator = m_allocator;
+
+            return S_OK;
+        }
+    }
+}
+
+HRESULT DirectShowSampleScheduler::NotifyAllocator(IMemAllocator *pAllocator, BOOL bReadOnly)
+{
+    Q_UNUSED(bReadOnly);
+
+    HRESULT hr;
+    ALLOCATOR_PROPERTIES properties;
+
+    if (!pAllocator) {
+        if (m_allocator)
+            m_allocator->Release();
+
+        m_allocator = 0;
+
+        return S_OK;
+    } else if ((hr = pAllocator->GetProperties(&properties)) != S_OK) {
+        return hr;
+    } else {
+        if (properties.cBuffers == 1) {
+            ALLOCATOR_PROPERTIES actual;
+
+            properties.cBuffers = 2;
+            if ((hr = pAllocator->SetProperties(&properties, &actual)) != S_OK)
+                return hr;
+        }
+
+        QMutexLocker locker(&m_mutex);
+
+        if (m_allocator)
+            m_allocator->Release();
+
+        m_allocator = pAllocator;
+        m_allocator->AddRef();
+
+        return S_OK;
+    }
+}
+
+HRESULT DirectShowSampleScheduler::GetAllocatorRequirements(ALLOCATOR_PROPERTIES *pProps)
+{
+    if (!pProps)
+        return E_POINTER;
+
+    pProps->cBuffers = 2;
+
+    return S_OK;
+}
+
+HRESULT DirectShowSampleScheduler::Receive(IMediaSample *pSample)
+{
+    if (!pSample)
+        return E_POINTER;
+
+    m_semaphore.acquire(1);
+
+    QMutexLocker locker(&m_mutex);
+
+    if (m_state & Flushing) {
+        m_semaphore.release(1);
+
+        return S_FALSE;
+    } else if (m_state == Stopped) {
+        m_semaphore.release();
+
+        return VFW_E_WRONG_STATE;
+    } else {
+        DirectShowTimedSample *timedSample = new DirectShowTimedSample(pSample);
+
+        if (m_tail)
+            m_tail->setNextSample(timedSample);
+        else
+            m_head = timedSample;
+
+        m_tail = timedSample;
+
+        if (m_state == Running) {
+            if (!timedSample->schedule(m_clock, m_startTime, m_timeoutEvent)) {
+                // Timing information is unavailable, so schedule frames immediately.
+                QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest));
+            } else {
+                locker.unlock();
+                HANDLE handles[] = { m_flushEvent, m_timeoutEvent };
+                DWORD result = ::WaitForMultipleObjects(2, handles, FALSE, INFINITE);
+                locker.relock();
+
+                if (result == WAIT_OBJECT_0 + 1)
+                    QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest));
+            }
+        } else if (m_tail == m_head) {
+            // If this is the first frame make it available.
+            QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest));
+
+            if (m_state == Paused) {
+                ::ResetEvent(m_timeoutEvent);
+
+                locker.unlock();
+                HANDLE handles[] = { m_flushEvent, m_timeoutEvent };
+                ::WaitForMultipleObjects(2, handles, FALSE, INFINITE);
+                locker.relock();
+            }
+        }
+
+        return S_OK;
+    }
+}
+
+HRESULT DirectShowSampleScheduler::ReceiveMultiple(
+        IMediaSample **pSamples, long nSamples, long *nSamplesProcessed)
+{
+    if (!pSamples || !nSamplesProcessed)
+        return E_POINTER;
+
+    for (*nSamplesProcessed = 0; *nSamplesProcessed < nSamples; ++(*nSamplesProcessed)) {
+        HRESULT hr = Receive(pSamples[*nSamplesProcessed]);
+
+        if (hr != S_OK)
+            return hr;
+    }
+    return S_OK;
+}
+
+HRESULT DirectShowSampleScheduler::ReceiveCanBlock()
+{
+    return S_OK;
+}
+
+void DirectShowSampleScheduler::run(REFERENCE_TIME startTime)
+{
+    QMutexLocker locker(&m_mutex);
+
+    m_state = (m_state & Flushing) | Running;
+    m_startTime = startTime;
+
+    for (DirectShowTimedSample *sample = m_head; sample; sample = sample->nextSample()) {
+        sample->schedule(m_clock, m_startTime, m_timeoutEvent);
+    }
+    
+    if (!(m_state & Flushing))
+        ::ResetEvent(m_flushEvent);
+    
+    if (!m_head)
+        ::SetEvent(m_timeoutEvent);
+
+}
+
+void DirectShowSampleScheduler::pause()
+{
+    QMutexLocker locker(&m_mutex);
+
+    m_state = (m_state & Flushing) | Paused;
+
+    for (DirectShowTimedSample *sample = m_head; sample; sample = sample->nextSample())
+        sample->unschedule(m_clock);
+
+    if (!(m_state & Flushing))
+        ::ResetEvent(m_flushEvent);
+}
+
+void DirectShowSampleScheduler::stop()
+{
+    QMutexLocker locker(&m_mutex);
+
+    m_state = m_state & Flushing;
+
+    for (DirectShowTimedSample *sample = m_head; sample; sample = sample->remove()) {
+        sample->unschedule(m_clock);
+        
+        m_semaphore.release(1);
+    }
+
+    m_head = 0;
+    m_tail = 0;
+
+    ::SetEvent(m_flushEvent);
+}
+
+void DirectShowSampleScheduler::setFlushing(bool flushing)
+{
+    QMutexLocker locker(&m_mutex);
+
+    const bool isFlushing = m_state & Flushing;
+
+    if (isFlushing != flushing) {
+        if (flushing) {
+            m_state |= Flushing;
+
+            for (DirectShowTimedSample *sample = m_head; sample; sample = sample->remove()) {
+                sample->unschedule(m_clock);
+
+                m_semaphore.release(1);
+            }
+            m_head = 0;
+            m_tail = 0;
+
+            ::SetEvent(m_flushEvent);
+        } else {
+            m_state &= ~Flushing;
+
+            if (m_state != Stopped)
+                ::ResetEvent(m_flushEvent);
+        }
+    }
+}
+
+void DirectShowSampleScheduler::setClock(IReferenceClock *clock)
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_clock)
+        m_clock->Release();
+
+    m_clock = clock;
+
+    if (m_clock)
+        m_clock->AddRef();
+}
+
+IMediaSample *DirectShowSampleScheduler::takeSample(bool *eos)
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_head && m_head->isReady(m_clock)) {
+        IMediaSample *sample = m_head->sample();
+        sample->AddRef();
+
+        *eos =  m_head->isLast();
+
+        m_head = m_head->remove();
+
+        if (!m_head)
+            m_tail = 0;
+
+        m_semaphore.release(1);
+
+        return sample;
+    } else {
+        return 0;
+    }
+}
+
+bool DirectShowSampleScheduler::scheduleEndOfStream()
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_tail) {
+        m_tail->setLast();
+
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool DirectShowSampleScheduler::event(QEvent *event)
+{
+    if (event->type() == QEvent::UpdateRequest) {
+        emit sampleReady();
+
+        return true;
+    } else {
+        return QObject::event(event);
+    }
+}