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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 "iodevicereader.h"
#include "qasyncreader.h"
#include "mediagraph.h"
#include <phonon/streaminterface.h>
#include <dshow.h>
#include <initguid.h>
QT_BEGIN_NAMESPACE
#ifndef QT_NO_PHONON_ABSTRACTMEDIASTREAM
namespace Phonon
{
namespace DS9
{
//these mediatypes define a stream, its type will be autodetected by DirectShow
static QVector<AM_MEDIA_TYPE> getMediaTypes()
{
AM_MEDIA_TYPE mt = { MEDIATYPE_Stream, MEDIASUBTYPE_NULL, TRUE, FALSE, 1, GUID_NULL, 0, 0, 0};
QVector<AM_MEDIA_TYPE> ret;
//normal auto-detect stream
mt.subtype = MEDIASUBTYPE_NULL;
ret << mt;
//AVI stream
mt.subtype = MEDIASUBTYPE_Avi;
ret << mt;
//WAVE stream
mt.subtype = MEDIASUBTYPE_WAVE;
ret << mt;
return ret;
}
class StreamReader : public QAsyncReader, public Phonon::StreamInterface
{
public:
StreamReader(QBaseFilter *parent, const Phonon::MediaSource &source, const MediaGraph *mg) :
QAsyncReader(parent, getMediaTypes()),
m_seekable(false), m_pos(0), m_size(-1), m_mediaGraph(mg)
{
connectToSource(source);
}
//for Phonon::StreamInterface
void writeData(const QByteArray &data)
{
QWriteLocker locker(&m_lock);
m_pos += data.size();
m_buffer += data;
}
void endOfData()
{
}
void setStreamSize(qint64 newSize)
{
QWriteLocker locker(&m_lock);
m_size = newSize;
}
qint64 streamSize() const
{
QReadLocker locker(&m_lock);
return m_size;
}
void setStreamSeekable(bool s)
{
QWriteLocker locker(&m_lock);
m_seekable = s;
}
bool streamSeekable() const
{
QReadLocker locker(&m_lock);
return m_seekable;
}
void setCurrentPos(qint64 pos)
{
QWriteLocker locker(&m_lock);
m_pos = pos;
seekStream(pos);
m_buffer.clear();
}
qint64 currentPos() const
{
QReadLocker locker(&m_lock);
return m_pos;
}
int currentBufferSize() const
{
QReadLocker locker(&m_lock);
return m_buffer.size();
}
//virtual pure members
//implementation from IAsyncReader
STDMETHODIMP Length(LONGLONG *total, LONGLONG *available)
{
QReadLocker locker(&m_lock);
if (total) {
*total = m_size;
}
if (available) {
*available = m_size;
}
return S_OK;
}
HRESULT read(LONGLONG pos, LONG length, BYTE *buffer, LONG *actual)
{
QMutexLocker locker(&m_mutexRead);
if (m_mediaGraph->isStopping()) {
return VFW_E_WRONG_STATE;
}
if(streamSize() != 1 && pos + length > streamSize()) {
//it tries to read outside of the boundaries
return E_FAIL;
}
if (currentPos() - currentBufferSize() != pos) {
if (!streamSeekable()) {
return S_FALSE;
}
setCurrentPos(pos);
}
int oldSize = currentBufferSize();
while (currentBufferSize() < int(length)) {
needData();
if (m_mediaGraph->isStopping()) {
return VFW_E_WRONG_STATE;
}
if (oldSize == currentBufferSize()) {
break; //we didn't get any data
}
oldSize = currentBufferSize();
}
DWORD bytesRead = qMin(currentBufferSize(), int(length));
{
QWriteLocker locker(&m_lock);
qMemCopy(buffer, m_buffer.data(), bytesRead);
//truncate the buffer
m_buffer = m_buffer.mid(bytesRead);
}
if (actual) {
*actual = bytesRead; //initialization
}
return bytesRead == length ? S_OK : S_FALSE;
}
public:
//for Phonon::StreamInterface
QByteArray m_buffer;
bool m_seekable;
qint64 m_pos;
qint64 m_size;
QMutex m_mutexRead;
const MediaGraph *m_mediaGraph;
};
IODeviceReader::IODeviceReader(const Phonon::MediaSource &source, const MediaGraph *mg) :
QBaseFilter(CLSID_NULL)
{
//create the output pin
m_streamReader = new StreamReader(this, source, mg);
}
IODeviceReader::~IODeviceReader()
{
}
STDMETHODIMP IODeviceReader::Stop()
{
HRESULT hr = QBaseFilter::Stop();
m_streamReader->enoughData(); //this asks to cancel any blocked call to needData
return hr;
}
}
}
#endif //QT_NO_PHONON_ABSTRACTMEDIASTREAM
QT_END_NAMESPACE
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