WMF: make it possible to build only the audio decode service

The WMF plugin can now be built without the media player service. That
enables the audio decode service even when DirectShow is used as media
player backend.
The default configuration on Windows is now:
Camera, MediaPlayer -> DirectShow
AudioDecode -> WMF

Change-Id: Ic6f3c85ed849e0c603719cfb03794e6abd2d52fa
Reviewed-by: Christian Stromme <christian.stromme@qt.io>

1 files changed, 167 insertions, 0 deletions

diff --git a/src/plugins/wmf/player/samplegrabber.cpp b/src/plugins/wmf/player/samplegrabber.cpp
new file mode 100644
index 000000000..35f038891
--- /dev/null
+++ b/src/plugins/wmf/player/samplegrabber.cpp
@@ -0,0 +1,167 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** 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 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "samplegrabber.h"
+#include "mfaudioprobecontrol.h"
+
+STDMETHODIMP SampleGrabberCallback::QueryInterface(REFIID riid, void** ppv)
+{
+    if (!ppv)
+        return E_POINTER;
+    if (riid == IID_IMFSampleGrabberSinkCallback) {
+        *ppv = static_cast<IMFSampleGrabberSinkCallback*>(this);
+    } else if (riid == IID_IMFClockStateSink) {
+        *ppv = static_cast<IMFClockStateSink*>(this);
+    } else if (riid == IID_IUnknown) {
+        *ppv = static_cast<IUnknown*>(this);
+    } else {
+        *ppv =  NULL;
+        return E_NOINTERFACE;
+    }
+    AddRef();
+    return S_OK;
+}
+
+STDMETHODIMP_(ULONG) SampleGrabberCallback::AddRef()
+{
+    return InterlockedIncrement(&m_cRef);
+}
+
+STDMETHODIMP_(ULONG) SampleGrabberCallback::Release()
+{
+    ULONG cRef = InterlockedDecrement(&m_cRef);
+    if (cRef == 0) {
+        delete this;
+    }
+    return cRef;
+
+}
+
+// IMFClockStateSink methods.
+
+STDMETHODIMP SampleGrabberCallback::OnClockStart(MFTIME hnsSystemTime, LONGLONG llClockStartOffset)
+{
+    Q_UNUSED(hnsSystemTime);
+    Q_UNUSED(llClockStartOffset);
+    return S_OK;
+}
+
+STDMETHODIMP SampleGrabberCallback::OnClockStop(MFTIME hnsSystemTime)
+{
+    Q_UNUSED(hnsSystemTime);
+    return S_OK;
+}
+
+STDMETHODIMP SampleGrabberCallback::OnClockPause(MFTIME hnsSystemTime)
+{
+    Q_UNUSED(hnsSystemTime);
+    return S_OK;
+}
+
+STDMETHODIMP SampleGrabberCallback::OnClockRestart(MFTIME hnsSystemTime)
+{
+    Q_UNUSED(hnsSystemTime);
+    return S_OK;
+}
+
+STDMETHODIMP SampleGrabberCallback::OnClockSetRate(MFTIME hnsSystemTime, float flRate)
+{
+    Q_UNUSED(hnsSystemTime);
+    Q_UNUSED(flRate);
+    return S_OK;
+}
+
+// IMFSampleGrabberSink methods.
+
+STDMETHODIMP SampleGrabberCallback::OnSetPresentationClock(IMFPresentationClock* pClock)
+{
+    Q_UNUSED(pClock);
+    return S_OK;
+}
+
+STDMETHODIMP SampleGrabberCallback::OnShutdown()
+{
+    return S_OK;
+}
+
+void AudioSampleGrabberCallback::addProbe(MFAudioProbeControl* probe)
+{
+    QMutexLocker locker(&m_audioProbeMutex);
+
+    if (m_audioProbes.contains(probe))
+        return;
+
+    m_audioProbes.append(probe);
+}
+
+void AudioSampleGrabberCallback::removeProbe(MFAudioProbeControl* probe)
+{
+    QMutexLocker locker(&m_audioProbeMutex);
+    m_audioProbes.removeOne(probe);
+}
+
+void AudioSampleGrabberCallback::setFormat(const QAudioFormat& format)
+{
+    m_format = format;
+}
+
+STDMETHODIMP AudioSampleGrabberCallback::OnProcessSample(REFGUID guidMajorMediaType, DWORD dwSampleFlags,
+    LONGLONG llSampleTime, LONGLONG llSampleDuration, const BYTE * pSampleBuffer,
+    DWORD dwSampleSize)
+{
+    Q_UNUSED(dwSampleFlags);
+    Q_UNUSED(llSampleTime);
+    Q_UNUSED(llSampleDuration);
+
+    if (guidMajorMediaType != GUID_NULL && guidMajorMediaType != MFMediaType_Audio)
+        return S_OK;
+
+    QMutexLocker locker(&m_audioProbeMutex);
+
+    if (m_audioProbes.isEmpty())
+        return S_OK;
+
+    // Check if sample has a presentation time
+    if (llSampleTime == _I64_MAX) {
+        // Set default QAudioBuffer start time
+        llSampleTime = -1;
+    } else {
+        // WMF uses 100-nanosecond units, Qt uses microseconds
+        llSampleTime /= 10;
+    }
+
+    foreach (MFAudioProbeControl* probe, m_audioProbes)
+        probe->bufferProbed((const char*)pSampleBuffer, dwSampleSize, m_format, llSampleTime);
+
+    return S_OK;
+}