Added wmf implementation for QAudioDecoderControl

Change-Id: Ib6d5c93577bd55995a9ae51e757156149890f15d
Reviewed-by: Jun Zhu <jun.5.zhu@nokia.com>
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/plugins/wmf/decoder/mfdecodersourcereader.cpp

@@ -0,0 +1,199 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mfdecodersourcereader.h"
+
+MFDecoderSourceReader::MFDecoderSourceReader(QObject *parent)
+    : m_cRef(1)
+    , m_sourceReader(0)
+    , m_source(0)
+{
+    Q_UNUSED(parent)
+}
+
+void MFDecoderSourceReader::shutdown()
+{
+    if (m_source) {
+        m_source->Release();
+        m_source = NULL;
+    }
+    if (m_sourceReader) {
+        m_sourceReader->Release();
+        m_sourceReader = NULL;
+    }
+}
+
+IMFMediaSource* MFDecoderSourceReader::mediaSource()
+{
+    return m_source;
+}
+
+IMFMediaType* MFDecoderSourceReader::setSource(IMFMediaSource *source, const QAudioFormat &audioFormat)
+{
+    IMFMediaType *mediaType = NULL;
+    if (m_source == source)
+        return mediaType;
+    if (m_source) {
+        m_source->Release();
+        m_source = NULL;
+    }
+    if (m_sourceReader) {
+        m_sourceReader->Release();
+        m_sourceReader = NULL;
+    }
+    if (!source)
+        return mediaType;
+    IMFAttributes *attr = NULL;
+    MFCreateAttributes(&attr, 1);
+    if (SUCCEEDED(attr->SetUnknown(MF_SOURCE_READER_ASYNC_CALLBACK, this))) {
+        if (SUCCEEDED(MFCreateSourceReaderFromMediaSource(source, attr, &m_sourceReader))) {
+            m_source = source;
+            m_source->AddRef();
+            m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_ALL_STREAMS), FALSE);
+            m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), TRUE);
+            IMFMediaType *pPartialType = NULL;
+            MFCreateMediaType(&pPartialType);
+            pPartialType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Audio);
+
+            if (audioFormat.sampleType() == QAudioFormat::Float) {
+                pPartialType->SetGUID(MF_MT_SUBTYPE, MFAudioFormat_Float);
+            } else {
+                pPartialType->SetGUID(MF_MT_SUBTYPE, MFAudioFormat_PCM);
+            }
+
+            m_sourceReader->SetCurrentMediaType(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), NULL, pPartialType);
+            pPartialType->Release();
+            m_sourceReader->GetCurrentMediaType(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), &mediaType);
+            // Ensure the stream is selected.
+            m_sourceReader->SetStreamSelection(DWORD(MF_SOURCE_READER_FIRST_AUDIO_STREAM), TRUE);
+        }
+        attr->Release();
+    }
+    return mediaType;
+}
+
+void MFDecoderSourceReader::reset()
+{
+    if (!m_sourceReader)
+        return;
+    PROPVARIANT vPos;
+    PropVariantInit(&vPos);
+    vPos.vt = VT_I8;
+    vPos.uhVal.QuadPart = 0;
+    m_sourceReader->SetCurrentPosition(GUID_NULL, vPos);
+}
+
+void MFDecoderSourceReader::readNextSample()
+{
+    if (!m_sourceReader)
+        return;
+    m_sourceReader->ReadSample(MF_SOURCE_READER_FIRST_AUDIO_STREAM, 0, NULL, NULL, NULL, NULL);
+}
+
+QList<IMFSample*> MFDecoderSourceReader::takeSamples() //internal samples will be cleared after this
+{
+    QList<IMFSample*> samples;
+    m_samplesMutex.lock();
+    samples = m_cachedSamples;
+    m_cachedSamples.clear();
+    m_samplesMutex.unlock();
+    return samples;
+}
+
+//from IUnknown
+STDMETHODIMP MFDecoderSourceReader::QueryInterface(REFIID riid, LPVOID *ppvObject)
+{
+    if (!ppvObject)
+        return E_POINTER;
+    if (riid == IID_IMFSourceReaderCallback) {
+        *ppvObject = static_cast<IMFSourceReaderCallback*>(this);
+    } else if (riid == IID_IUnknown) {
+        *ppvObject = static_cast<IUnknown*>(this);
+    } else {
+        *ppvObject =  NULL;
+        return E_NOINTERFACE;
+    }
+    AddRef();
+    return S_OK;
+}
+
+STDMETHODIMP_(ULONG) MFDecoderSourceReader::AddRef(void)
+{
+    return InterlockedIncrement(&m_cRef);
+}
+
+STDMETHODIMP_(ULONG) MFDecoderSourceReader::Release(void)
+{
+    LONG cRef = InterlockedDecrement(&m_cRef);
+    if (cRef == 0) {
+        this->deleteLater();
+    }
+    return cRef;
+}
+
+//from IMFSourceReaderCallback
+STDMETHODIMP MFDecoderSourceReader::OnReadSample(HRESULT hrStatus, DWORD dwStreamIndex,
+    DWORD dwStreamFlags, LONGLONG llTimestamp, IMFSample *pSample)
+{
+    Q_UNUSED(hrStatus);
+    Q_UNUSED(dwStreamIndex);
+    Q_UNUSED(llTimestamp);
+    if (pSample) {
+        pSample->AddRef();
+        m_samplesMutex.lock();
+        m_cachedSamples.push_back(pSample);
+        m_samplesMutex.unlock();
+        emit sampleAdded();
+    } else if ((dwStreamFlags & MF_SOURCE_READERF_ENDOFSTREAM) == MF_SOURCE_READERF_ENDOFSTREAM) {
+        emit finished();
+    }
+    return S_OK;
+}
+
+STDMETHODIMP MFDecoderSourceReader::OnFlush(DWORD)
+{
+    return S_OK;
+}
+
+STDMETHODIMP MFDecoderSourceReader::OnEvent(DWORD, IMFMediaEvent*)
+{
+    return S_OK;
+}