Initial copy of QtMultimediaKit.
Comes from original repo, with SHA1: 2c82d5611655e5967f5c5095af50c0991c4378b2
This commit is contained in:
Michael Goddard
437
src/plugins/directshow/player/directshowsamplescheduler.cpp
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437
src/plugins/directshow/player/directshowsamplescheduler.cpp
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "directshowsamplescheduler.h"
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#include <QtCore/qcoreapplication.h>
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#include <QtCore/qcoreevent.h>
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class DirectShowTimedSample
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{
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public:
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DirectShowTimedSample(IMediaSample *sample)
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: m_next(0)
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, m_sample(sample)
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, m_cookie(0)
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, m_lastSample(false)
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{
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m_sample->AddRef();
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}
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~DirectShowTimedSample()
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{
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m_sample->Release();
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}
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IMediaSample *sample() const { return m_sample; }
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DirectShowTimedSample *nextSample() const { return m_next; }
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void setNextSample(DirectShowTimedSample *sample) { Q_ASSERT(!m_next); m_next = sample; }
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DirectShowTimedSample *remove() {
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DirectShowTimedSample *next = m_next; delete this; return next; }
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bool schedule(IReferenceClock *clock, REFERENCE_TIME startTime, HANDLE handle);
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void unschedule(IReferenceClock *clock);
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bool isReady(IReferenceClock *clock) const;
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bool isLast() const { return m_lastSample; }
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void setLast() { m_lastSample = true; }
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private:
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DirectShowTimedSample *m_next;
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IMediaSample *m_sample;
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DWORD_PTR m_cookie;
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bool m_lastSample;
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};
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bool DirectShowTimedSample::schedule(
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IReferenceClock *clock, REFERENCE_TIME startTime, HANDLE handle)
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{
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REFERENCE_TIME sampleStartTime;
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REFERENCE_TIME sampleEndTime;
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if (m_sample->GetTime(&sampleStartTime, &sampleEndTime) == S_OK) {
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if (clock->AdviseTime(
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startTime, sampleStartTime, reinterpret_cast<HEVENT>(handle), &m_cookie) == S_OK) {
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return true;
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}
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}
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return false;
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}
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void DirectShowTimedSample::unschedule(IReferenceClock *clock)
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{
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clock->Unadvise(m_cookie);
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}
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bool DirectShowTimedSample::isReady(IReferenceClock *clock) const
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{
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REFERENCE_TIME sampleStartTime;
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REFERENCE_TIME sampleEndTime;
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REFERENCE_TIME currentTime;
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if (m_sample->GetTime(&sampleStartTime, &sampleEndTime) == S_OK) {
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if (clock->GetTime(¤tTime) == S_OK)
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return currentTime >= sampleStartTime;
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}
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return true;
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}
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DirectShowSampleScheduler::DirectShowSampleScheduler(IUnknown *pin, QObject *parent)
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: QObject(parent)
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, m_pin(pin)
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, m_clock(0)
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, m_allocator(0)
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, m_head(0)
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, m_tail(0)
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, m_maximumSamples(1)
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, m_state(Stopped)
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, m_startTime(0)
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, m_timeoutEvent(::CreateEvent(0, 0, 0, 0))
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, m_flushEvent(::CreateEvent(0, 0, 0, 0))
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{
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m_semaphore.release(m_maximumSamples);
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}
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DirectShowSampleScheduler::~DirectShowSampleScheduler()
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{
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::CloseHandle(m_timeoutEvent);
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::CloseHandle(m_flushEvent);
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Q_ASSERT(!m_clock);
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Q_ASSERT(!m_allocator);
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}
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HRESULT DirectShowSampleScheduler::QueryInterface(REFIID riid, void **ppvObject)
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{
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return m_pin->QueryInterface(riid, ppvObject);
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}
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ULONG DirectShowSampleScheduler::AddRef()
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{
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return m_pin->AddRef();
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}
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ULONG DirectShowSampleScheduler::Release()
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{
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return m_pin->Release();
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}
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// IMemInputPin
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HRESULT DirectShowSampleScheduler::GetAllocator(IMemAllocator **ppAllocator)
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{
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if (!ppAllocator) {
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return E_POINTER;
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} else {
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QMutexLocker locker(&m_mutex);
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if (!m_allocator) {
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return VFW_E_NO_ALLOCATOR;
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} else {
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*ppAllocator = m_allocator;
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return S_OK;
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}
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}
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}
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HRESULT DirectShowSampleScheduler::NotifyAllocator(IMemAllocator *pAllocator, BOOL bReadOnly)
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{
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Q_UNUSED(bReadOnly);
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HRESULT hr;
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ALLOCATOR_PROPERTIES properties;
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if (!pAllocator) {
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if (m_allocator)
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m_allocator->Release();
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m_allocator = 0;
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return S_OK;
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} else if ((hr = pAllocator->GetProperties(&properties)) != S_OK) {
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return hr;
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} else {
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if (properties.cBuffers == 1) {
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ALLOCATOR_PROPERTIES actual;
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properties.cBuffers = 2;
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if ((hr = pAllocator->SetProperties(&properties, &actual)) != S_OK)
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return hr;
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}
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QMutexLocker locker(&m_mutex);
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if (m_allocator)
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m_allocator->Release();
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m_allocator = pAllocator;
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m_allocator->AddRef();
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return S_OK;
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}
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}
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HRESULT DirectShowSampleScheduler::GetAllocatorRequirements(ALLOCATOR_PROPERTIES *pProps)
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{
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if (!pProps)
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return E_POINTER;
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pProps->cBuffers = 2;
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return S_OK;
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}
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HRESULT DirectShowSampleScheduler::Receive(IMediaSample *pSample)
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{
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if (!pSample)
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return E_POINTER;
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m_semaphore.acquire(1);
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QMutexLocker locker(&m_mutex);
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if (m_state & Flushing) {
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m_semaphore.release(1);
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return S_FALSE;
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} else if (m_state == Stopped) {
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m_semaphore.release();
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return VFW_E_WRONG_STATE;
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} else {
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DirectShowTimedSample *timedSample = new DirectShowTimedSample(pSample);
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if (m_tail)
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m_tail->setNextSample(timedSample);
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else
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m_head = timedSample;
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m_tail = timedSample;
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if (m_state == Running) {
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if (!timedSample->schedule(m_clock, m_startTime, m_timeoutEvent)) {
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// Timing information is unavailable, so schedule frames immediately.
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QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest));
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} else {
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locker.unlock();
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HANDLE handles[] = { m_flushEvent, m_timeoutEvent };
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DWORD result = ::WaitForMultipleObjects(2, handles, FALSE, INFINITE);
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locker.relock();
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if (result == WAIT_OBJECT_0 + 1)
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QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest));
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}
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} else if (m_tail == m_head) {
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// If this is the first frame make it available.
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QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest));
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if (m_state == Paused) {
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::ResetEvent(m_timeoutEvent);
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locker.unlock();
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HANDLE handles[] = { m_flushEvent, m_timeoutEvent };
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::WaitForMultipleObjects(2, handles, FALSE, INFINITE);
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locker.relock();
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}
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}
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return S_OK;
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}
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}
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HRESULT DirectShowSampleScheduler::ReceiveMultiple(
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IMediaSample **pSamples, long nSamples, long *nSamplesProcessed)
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{
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if (!pSamples || !nSamplesProcessed)
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return E_POINTER;
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for (*nSamplesProcessed = 0; *nSamplesProcessed < nSamples; ++(*nSamplesProcessed)) {
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HRESULT hr = Receive(pSamples[*nSamplesProcessed]);
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if (hr != S_OK)
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return hr;
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}
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return S_OK;
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}
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HRESULT DirectShowSampleScheduler::ReceiveCanBlock()
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{
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return S_OK;
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}
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void DirectShowSampleScheduler::run(REFERENCE_TIME startTime)
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{
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QMutexLocker locker(&m_mutex);
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m_state = (m_state & Flushing) | Running;
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m_startTime = startTime;
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for (DirectShowTimedSample *sample = m_head; sample; sample = sample->nextSample()) {
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sample->schedule(m_clock, m_startTime, m_timeoutEvent);
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}
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if (!(m_state & Flushing))
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::ResetEvent(m_flushEvent);
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if (!m_head)
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::SetEvent(m_timeoutEvent);
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}
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void DirectShowSampleScheduler::pause()
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{
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QMutexLocker locker(&m_mutex);
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m_state = (m_state & Flushing) | Paused;
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for (DirectShowTimedSample *sample = m_head; sample; sample = sample->nextSample())
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sample->unschedule(m_clock);
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if (!(m_state & Flushing))
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::ResetEvent(m_flushEvent);
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}
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void DirectShowSampleScheduler::stop()
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{
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QMutexLocker locker(&m_mutex);
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m_state = m_state & Flushing;
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for (DirectShowTimedSample *sample = m_head; sample; sample = sample->remove()) {
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sample->unschedule(m_clock);
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m_semaphore.release(1);
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}
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m_head = 0;
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m_tail = 0;
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::SetEvent(m_flushEvent);
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}
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void DirectShowSampleScheduler::setFlushing(bool flushing)
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{
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QMutexLocker locker(&m_mutex);
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const bool isFlushing = m_state & Flushing;
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if (isFlushing != flushing) {
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if (flushing) {
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m_state |= Flushing;
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for (DirectShowTimedSample *sample = m_head; sample; sample = sample->remove()) {
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sample->unschedule(m_clock);
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m_semaphore.release(1);
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}
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m_head = 0;
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m_tail = 0;
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::SetEvent(m_flushEvent);
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} else {
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m_state &= ~Flushing;
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if (m_state != Stopped)
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::ResetEvent(m_flushEvent);
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}
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}
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}
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void DirectShowSampleScheduler::setClock(IReferenceClock *clock)
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{
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QMutexLocker locker(&m_mutex);
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if (m_clock)
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m_clock->Release();
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m_clock = clock;
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if (m_clock)
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m_clock->AddRef();
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}
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IMediaSample *DirectShowSampleScheduler::takeSample(bool *eos)
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{
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QMutexLocker locker(&m_mutex);
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if (m_head && m_head->isReady(m_clock)) {
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IMediaSample *sample = m_head->sample();
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sample->AddRef();
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*eos = m_head->isLast();
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m_head = m_head->remove();
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if (!m_head)
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m_tail = 0;
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m_semaphore.release(1);
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return sample;
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} else {
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return 0;
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}
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}
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bool DirectShowSampleScheduler::scheduleEndOfStream()
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{
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QMutexLocker locker(&m_mutex);
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if (m_tail) {
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m_tail->setLast();
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return true;
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} else {
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return false;
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}
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}
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bool DirectShowSampleScheduler::event(QEvent *event)
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{
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if (event->type() == QEvent::UpdateRequest) {
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emit sampleReady();
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return true;
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} else {
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return QObject::event(event);
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}
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}
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