gecko/content/media/wmf/WMFSourceReaderCallback.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WMFSourceReaderCallback.h"
#include "WMFUtils.h"
namespace mozilla {
#ifdef PR_LOGGING
static PRLogModuleInfo* gWMFSourceReaderCallbackLog = nullptr;
#define LOG(...) PR_LOG(gWMFSourceReaderCallbackLog, PR_LOG_DEBUG, (__VA_ARGS__))
#else
#define LOG(...)
#endif
// IUnknown Methods
STDMETHODIMP
WMFSourceReaderCallback::QueryInterface(REFIID aIId, void **aInterface)
{
LOG("WMFSourceReaderCallback::QueryInterface %s", GetGUIDName(aIId).get());
if (aIId == IID_IMFSourceReaderCallback) {
return DoGetInterface(static_cast<WMFSourceReaderCallback*>(this), aInterface);
}
if (aIId == IID_IUnknown) {
return DoGetInterface(static_cast<WMFSourceReaderCallback*>(this), aInterface);
}
*aInterface = NULL;
return E_NOINTERFACE;
}
NS_IMPL_THREADSAFE_ADDREF(WMFSourceReaderCallback)
NS_IMPL_THREADSAFE_RELEASE(WMFSourceReaderCallback)
WMFSourceReaderCallback::WMFSourceReaderCallback()
: mResultStatus(S_OK)
, mStreamFlags(0)
, mTimestamp(0)
, mSample(nullptr)
, mReadFinished(false)
, mMonitor("WMFSourceReaderCallback")
{
#ifdef PR_LOGGING
if (!gWMFSourceReaderCallbackLog) {
gWMFSourceReaderCallbackLog = PR_NewLogModule("WMFSourceReaderCallback");
}
#endif
}
HRESULT
WMFSourceReaderCallback::NotifyReadComplete(HRESULT aReadStatus,
DWORD aStreamIndex,
DWORD aStreamFlags,
LONGLONG aTimestamp,
IMFSample *aSample)
{
// Note: aSample can be NULL on success if more data is required!
ReentrantMonitorAutoEnter mon(mMonitor);
if (mSample) {
// The WMFReader should have called Wait() to retrieve the last
// sample returned by the last ReadSample() call, but if we're
// aborting the read before Wait() is called the sample ref
// can be non-null.
mSample->Release();
mSample = nullptr;
}
if (SUCCEEDED(aReadStatus)) {
if (aSample) {
mTimestamp = aTimestamp;
mSample = aSample;
mSample->AddRef();
}
}
mResultStatus = aReadStatus;
mStreamFlags = aStreamFlags;
// Set the sentinal value and notify the monitor, so that threads waiting
// in Wait() are awoken.
mReadFinished = true;
mon.NotifyAll();
return S_OK;
}
STDMETHODIMP
WMFSourceReaderCallback::OnReadSample(HRESULT aReadStatus,
DWORD aStreamIndex,
DWORD aStreamFlags,
LONGLONG aTimestamp,
IMFSample *aSample)
{
LOG("WMFSourceReaderCallback::OnReadSample() hr=0x%x flags=0x%x time=%lld sample=%p",
aReadStatus, aStreamFlags, aTimestamp, aSample);
return NotifyReadComplete(aReadStatus,
aStreamIndex,
aStreamFlags,
aTimestamp,
aSample);
}
HRESULT
WMFSourceReaderCallback::Cancel()
{
LOG("WMFSourceReaderCallback::Cancel()");
return NotifyReadComplete(E_ABORT,
0,
0,
0,
nullptr);
}
STDMETHODIMP
WMFSourceReaderCallback::OnEvent(DWORD, IMFMediaEvent *)
{
return S_OK;
}
STDMETHODIMP
WMFSourceReaderCallback::OnFlush(DWORD)
{
return S_OK;
}
HRESULT
WMFSourceReaderCallback::Wait(DWORD* aStreamFlags,
LONGLONG* aTimeStamp,
IMFSample** aSample)
{
ReentrantMonitorAutoEnter mon(mMonitor);
LOG("WMFSourceReaderCallback::Wait() starting wait");
while (!mReadFinished) {
mon.Wait();
}
mReadFinished = false;
LOG("WMFSourceReaderCallback::Wait() done waiting");
*aStreamFlags = mStreamFlags;
*aTimeStamp = mTimestamp;
*aSample = mSample;
HRESULT hr = mResultStatus;
mSample = nullptr;
mTimestamp = 0;
mStreamFlags = 0;
mResultStatus = S_OK;
return hr;
}
} // namespace mozilla