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/* This file is part of the KDE project.
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qasyncreader.h"
#include "qbasefilter.h"
QT_BEGIN_NAMESPACE
namespace Phonon
{
namespace DS9
{
QAsyncReader::QAsyncReader(QBaseFilter *parent, const QVector<AM_MEDIA_TYPE> &mediaTypes) : QPin(parent, PINDIR_OUTPUT, mediaTypes)
{
}
QAsyncReader::~QAsyncReader()
{
}
STDMETHODIMP QAsyncReader::QueryInterface(REFIID iid, void **out)
{
if (!out) {
return E_POINTER;
}
if (iid == IID_IAsyncReader) {
AddRef();
*out = static_cast<IAsyncReader*>(this);
return S_OK;
}
return QPin::QueryInterface(iid, out);
}
STDMETHODIMP_(ULONG) QAsyncReader::AddRef()
{
return QPin::AddRef();
}
STDMETHODIMP_(ULONG) QAsyncReader::Release()
{
return QPin::Release();
}
STDMETHODIMP QAsyncReader::RequestAllocator(IMemAllocator *preferred, ALLOCATOR_PROPERTIES *prop,IMemAllocator **actual)
{
ALLOCATOR_PROPERTIES prop2;
if (prop->cbAlign == 0) {
prop->cbAlign = 1; //align on 1 char
}
if (preferred && preferred->SetProperties(prop, &prop2) == S_OK) {
preferred->AddRef();
*actual = preferred;
return S_OK;
}
//we should try to create one memory allocator ourselves here
return E_FAIL;
}
STDMETHODIMP QAsyncReader::Request(IMediaSample *sample,DWORD_PTR user)
{
QMutexLocker locker(&m_mutex);
if (m_flushing) {
return VFW_E_WRONG_STATE;
}
m_requestQueue.enqueue(AsyncRequest(sample, user));
m_requestWait.wakeOne();
return S_OK;
}
STDMETHODIMP QAsyncReader::WaitForNext(DWORD timeout, IMediaSample **sample, DWORD_PTR *user)
{
QMutexLocker locker(&m_mutex);
if (!sample ||!user) {
return E_POINTER;
}
//msdn says to return immediately if we're flushing but that doesn't seem to be true
//since it triggers a dead-lock somewhere inside directshow (see task 258830)
*sample = 0;
*user = 0;
if (m_requestQueue.isEmpty()) {
if (m_requestWait.wait(&m_mutex, timeout) == false) {
return VFW_E_TIMEOUT;
}
if (m_requestQueue.isEmpty()) {
return VFW_E_WRONG_STATE;
}
}
AsyncRequest r = m_requestQueue.dequeue();
//at this point we're sure to have a request to proceed
if (r.sample == 0) {
return E_FAIL;
}
*sample = r.sample;
*user = r.user;
return syncReadAlignedUnlocked(r.sample);
}
STDMETHODIMP QAsyncReader::BeginFlush()
{
QMutexLocker locker(&m_mutex);
m_flushing = true;
m_requestWait.wakeOne();
return S_OK;
}
STDMETHODIMP QAsyncReader::EndFlush()
{
QMutexLocker locker(&m_mutex);
m_flushing = false;
return S_OK;
}
STDMETHODIMP QAsyncReader::SyncReadAligned(IMediaSample *sample)
{
QMutexLocker locker(&m_mutex);
return syncReadAlignedUnlocked(sample);
}
STDMETHODIMP QAsyncReader::SyncRead(LONGLONG pos, LONG length, BYTE *buffer)
{
QMutexLocker locker(&m_mutex);
return read(pos, length, buffer, 0);
}
STDMETHODIMP QAsyncReader::syncReadAlignedUnlocked(IMediaSample *sample)
{
Q_ASSERT(!m_mutex.tryLock());
if (!sample) {
return E_POINTER;
}
REFERENCE_TIME start = 0,
stop = 0;
HRESULT hr = sample->GetTime(&start, &stop);
if(FAILED(hr)) {
return hr;
}
LONGLONG startPos = start / 10000000;
LONG length = static_cast<LONG>((stop - start) / 10000000);
BYTE *buffer;
hr = sample->GetPointer(&buffer);
if(FAILED(hr)) {
return hr;
}
LONG actual = 0;
read(startPos, length, buffer, &actual);
return sample->SetActualDataLength(actual);
}
}
}
QT_END_NAMESPACE
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