--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/multimedia/directshow/player/directshowioreader.cpp Wed Aug 25 15:49:42 2010 +0300
@@ -0,0 +1,496 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "directshowioreader.h"
+
+#include "directshoweventloop.h"
+#include "directshowglobal.h"
+#include "directshowiosource.h"
+
+#include <QtCore/qcoreapplication.h>
+#include <QtCore/qcoreevent.h>
+#include <QtCore/qiodevice.h>
+#include <QtCore/qthread.h>
+
+class DirectShowSampleRequest
+{
+public:
+ DirectShowSampleRequest(
+ IMediaSample *sample, DWORD_PTR userData, LONGLONG position, LONG length, BYTE *buffer)
+ : next(0)
+ , sample(sample)
+ , userData(userData)
+ , position(position)
+ , length(length)
+ , buffer(buffer)
+ , result(S_FALSE)
+ {
+ }
+
+ DirectShowSampleRequest *remove() { DirectShowSampleRequest *n = next; delete this; return n; }
+
+ DirectShowSampleRequest *next;
+ IMediaSample *sample;
+ DWORD_PTR userData;
+ LONGLONG position;
+ LONG length;
+ BYTE *buffer;
+ HRESULT result;
+};
+
+DirectShowIOReader::DirectShowIOReader(
+ QIODevice *device, DirectShowIOSource *source, DirectShowEventLoop *loop)
+ : m_source(source)
+ , m_device(device)
+ , m_loop(loop)
+ , m_pendingHead(0)
+ , m_pendingTail(0)
+ , m_readyHead(0)
+ , m_readyTail(0)
+ , m_synchronousPosition(0)
+ , m_synchronousLength(0)
+ , m_synchronousBytesRead(0)
+ , m_synchronousBuffer(0)
+ , m_synchronousResult(S_OK)
+ , m_totalLength(0)
+ , m_availableLength(0)
+ , m_flushing(false)
+{
+ moveToThread(device->thread());
+
+ connect(device, SIGNAL(readyRead()), this, SLOT(readyRead()));
+}
+
+DirectShowIOReader::~DirectShowIOReader()
+{
+ flushRequests();
+}
+
+HRESULT DirectShowIOReader::QueryInterface(REFIID riid, void **ppvObject)
+{
+ return m_source->QueryInterface(riid, ppvObject);
+}
+
+ULONG DirectShowIOReader::AddRef()
+{
+ return m_source->AddRef();
+}
+
+ULONG DirectShowIOReader::Release()
+{
+ return m_source->Release();
+}
+
+// IAsyncReader
+HRESULT DirectShowIOReader::RequestAllocator(
+ IMemAllocator *pPreferred, ALLOCATOR_PROPERTIES *pProps, IMemAllocator **ppActual)
+{
+ if (!ppActual || !pProps) {
+ return E_POINTER;
+ } else {
+ ALLOCATOR_PROPERTIES actualProperties;
+
+ if (pProps->cbAlign == 0)
+ pProps->cbAlign = 1;
+
+ if (pPreferred && pPreferred->SetProperties(pProps, &actualProperties) == S_OK) {
+ pPreferred->AddRef();
+
+ *ppActual = pPreferred;
+
+ m_source->setAllocator(*ppActual);
+
+ return S_OK;
+ } else {
+ *ppActual = com_new<IMemAllocator>(CLSID_MemoryAllocator, IID_IMemAllocator);
+
+ if (*ppActual) {
+ if ((*ppActual)->SetProperties(pProps, &actualProperties) != S_OK) {
+ (*ppActual)->Release();
+ } else {
+ m_source->setAllocator(*ppActual);
+
+ return S_OK;
+ }
+ }
+ }
+ ppActual = 0;
+
+ return E_FAIL;
+ }
+}
+
+HRESULT DirectShowIOReader::Request(IMediaSample *pSample, DWORD_PTR dwUser)
+{
+ QMutexLocker locker(&m_mutex);
+
+ if (!pSample) {
+ return E_POINTER;
+ } else if (m_flushing) {
+ return VFW_E_WRONG_STATE;
+ } else {
+ REFERENCE_TIME startTime = 0;
+ REFERENCE_TIME endTime = 0;
+ BYTE *buffer;
+
+ if (pSample->GetTime(&startTime, &endTime) != S_OK
+ || pSample->GetPointer(&buffer) != S_OK) {
+ return VFW_E_SAMPLE_TIME_NOT_SET;
+ } else {
+ LONGLONG position = startTime / 10000000;
+ LONG length = (endTime - startTime) / 10000000;
+
+ DirectShowSampleRequest *request = new DirectShowSampleRequest(
+ pSample, dwUser, position, length, buffer);
+
+ if (m_pendingTail) {
+ m_pendingTail->next = request;
+ } else {
+ m_pendingHead = request;
+
+ m_loop->postEvent(this, new QEvent(QEvent::User));
+ }
+ m_pendingTail = request;
+
+ return S_OK;
+ }
+ }
+}
+
+HRESULT DirectShowIOReader::WaitForNext(
+ DWORD dwTimeout, IMediaSample **ppSample, DWORD_PTR *pdwUser)
+{
+ if (!ppSample || !pdwUser)
+ return E_POINTER;
+
+ QMutexLocker locker(&m_mutex);
+
+ do {
+ if (m_readyHead) {
+ DirectShowSampleRequest *request = m_readyHead;
+
+ *ppSample = request->sample;
+ *pdwUser = request->userData;
+
+ HRESULT hr = request->result;
+
+ m_readyHead = request->next;
+
+ if (!m_readyHead)
+ m_readyTail = 0;
+
+ delete request;
+
+ return hr;
+ } else if (m_flushing) {
+ *ppSample = 0;
+ *pdwUser = 0;
+
+ return VFW_E_WRONG_STATE;
+ }
+ } while (m_wait.wait(&m_mutex, dwTimeout));
+
+ *ppSample = 0;
+ *pdwUser = 0;
+
+ return VFW_E_TIMEOUT;
+}
+
+HRESULT DirectShowIOReader::SyncReadAligned(IMediaSample *pSample)
+{
+ if (!pSample) {
+ return E_POINTER;
+ } else {
+ REFERENCE_TIME startTime = 0;
+ REFERENCE_TIME endTime = 0;
+ BYTE *buffer;
+
+ if (pSample->GetTime(&startTime, &endTime) != S_OK
+ || pSample->GetPointer(&buffer) != S_OK) {
+ return VFW_E_SAMPLE_TIME_NOT_SET;
+ } else {
+ LONGLONG position = startTime / 10000000;
+ LONG length = (endTime - startTime) / 10000000;
+
+ QMutexLocker locker(&m_mutex);
+
+ if (thread() == QThread::currentThread()) {
+ qint64 bytesRead = 0;
+
+ HRESULT hr = blockingRead(position, length, buffer, &bytesRead);
+
+ if (SUCCEEDED(hr))
+ pSample->SetActualDataLength(bytesRead);
+
+ return hr;
+ } else {
+ m_synchronousPosition = position;
+ m_synchronousLength = length;
+ m_synchronousBuffer = buffer;
+
+ m_loop->postEvent(this, new QEvent(QEvent::User));
+
+ m_wait.wait(&m_mutex);
+
+ m_synchronousBuffer = 0;
+
+ if (SUCCEEDED(m_synchronousResult))
+ pSample->SetActualDataLength(m_synchronousBytesRead);
+
+ return m_synchronousResult;
+ }
+ }
+ }
+}
+
+HRESULT DirectShowIOReader::SyncRead(LONGLONG llPosition, LONG lLength, BYTE *pBuffer)
+{
+ if (!pBuffer) {
+ return E_POINTER;
+ } else {
+ if (thread() == QThread::currentThread()) {
+ qint64 bytesRead;
+
+ return blockingRead(llPosition, lLength, pBuffer, &bytesRead);
+ } else {
+ QMutexLocker locker(&m_mutex);
+
+ m_synchronousPosition = llPosition;
+ m_synchronousLength = lLength;
+ m_synchronousBuffer = pBuffer;
+
+ m_loop->postEvent(this, new QEvent(QEvent::User));
+
+ m_wait.wait(&m_mutex);
+
+ m_synchronousBuffer = 0;
+
+ return m_synchronousResult;
+ }
+ }
+}
+
+HRESULT DirectShowIOReader::Length(LONGLONG *pTotal, LONGLONG *pAvailable)
+{
+ if (!pTotal || !pAvailable) {
+ return E_POINTER;
+ } else {
+ QMutexLocker locker(&m_mutex);
+
+ *pTotal = m_totalLength;
+ *pAvailable = m_availableLength;
+
+ return S_OK;
+ }
+}
+
+
+HRESULT DirectShowIOReader::BeginFlush()
+{
+ QMutexLocker locker(&m_mutex);
+
+ if (m_flushing)
+ return S_FALSE;
+
+ m_flushing = true;
+
+ flushRequests();
+
+ m_wait.wakeAll();
+
+ return S_OK;
+}
+
+HRESULT DirectShowIOReader::EndFlush()
+{
+ QMutexLocker locker(&m_mutex);
+
+ if (!m_flushing)
+ return S_FALSE;
+
+ m_flushing = false;
+
+ return S_OK;
+}
+
+void DirectShowIOReader::customEvent(QEvent *event)
+{
+ if (event->type() == QEvent::User) {
+ readyRead();
+ } else {
+ QObject::customEvent(event);
+ }
+}
+
+void DirectShowIOReader::readyRead()
+{
+ QMutexLocker locker(&m_mutex);
+
+ m_availableLength = m_device->bytesAvailable() + m_device->pos();
+ m_totalLength = m_device->size();
+
+ if (m_synchronousBuffer) {
+ if (nonBlockingRead(
+ m_synchronousPosition,
+ m_synchronousLength,
+ m_synchronousBuffer,
+ &m_synchronousBytesRead,
+ &m_synchronousResult)) {
+ m_wait.wakeAll();
+ }
+ } else {
+ qint64 bytesRead = 0;
+
+ while (m_pendingHead && nonBlockingRead(
+ m_pendingHead->position,
+ m_pendingHead->length,
+ m_pendingHead->buffer,
+ &bytesRead,
+ &m_pendingHead->result)) {
+ m_pendingHead->sample->SetActualDataLength(bytesRead);
+
+ if (m_readyTail)
+ m_readyTail->next = m_pendingHead;
+ m_readyTail = m_pendingHead;
+
+ m_pendingHead = m_pendingHead->next;
+
+ m_readyTail->next = 0;
+
+ if (!m_pendingHead)
+ m_pendingTail = 0;
+
+ if (!m_readyHead)
+ m_readyHead = m_readyTail;
+
+ m_wait.wakeAll();
+ }
+ }
+}
+
+HRESULT DirectShowIOReader::blockingRead(
+ LONGLONG position, LONG length, BYTE *buffer, qint64 *bytesRead)
+{
+ *bytesRead = 0;
+
+ if (qint64(position) > m_device->size())
+ return S_FALSE;
+
+ const qint64 maxSize = qMin<qint64>(m_device->size(), position + length);
+
+ while (m_device->bytesAvailable() + m_device->pos() < maxSize) {
+ if (!m_device->waitForReadyRead(-1))
+ return S_FALSE;
+ }
+
+ if (m_device->pos() != position && !m_device->seek(position))
+ return S_FALSE;
+
+ const qint64 maxBytes = qMin<qint64>(length, m_device->bytesAvailable());
+
+ *bytesRead = m_device->read(reinterpret_cast<char *>(buffer), maxBytes);
+
+ if (*bytesRead != length) {
+ qMemSet(buffer + *bytesRead, 0, length - *bytesRead);
+
+ return S_FALSE;
+ } else {
+ return S_OK;
+ }
+}
+
+bool DirectShowIOReader::nonBlockingRead(
+ LONGLONG position, LONG length, BYTE *buffer, qint64 *bytesRead, HRESULT *result)
+{
+ const qint64 maxSize = qMin<qint64>(m_device->size(), position + length);
+
+ if (position > m_device->size()) {
+ *bytesRead = 0;
+ *result = S_FALSE;
+
+ return true;
+ } else if (m_device->bytesAvailable() + m_device->pos() >= maxSize) {
+ if (m_device->pos() != position && !m_device->seek(position)) {
+ *bytesRead = 0;
+ *result = S_FALSE;
+
+ return true;
+ } else {
+ const qint64 maxBytes = qMin<qint64>(length, m_device->bytesAvailable());
+
+ *bytesRead = m_device->read(reinterpret_cast<char *>(buffer), maxBytes);
+
+ if (*bytesRead != length) {
+ qMemSet(buffer + *bytesRead, 0, length - *bytesRead);
+
+ *result = S_FALSE;
+ } else {
+ *result = S_OK;
+ }
+
+ return true;
+ }
+ } else {
+ return false;
+ }
+}
+
+void DirectShowIOReader::flushRequests()
+{
+ while (m_pendingHead) {
+ m_pendingHead->result = VFW_E_WRONG_STATE;
+
+ if (m_readyTail)
+ m_readyTail->next = m_pendingHead;
+
+ m_readyTail = m_pendingHead;
+
+ m_pendingHead = m_pendingHead->next;
+
+ m_readyTail->next = 0;
+
+ if (!m_pendingHead)
+ m_pendingTail = 0;
+
+ if (!m_readyHead)
+ m_readyHead = m_readyTail;
+ }
+}