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Diffstat (limited to 'src/3rdparty/phonon/ds9/iodevicereader.cpp')
| -rw-r--r-- | src/3rdparty/phonon/ds9/iodevicereader.cpp | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/src/3rdparty/phonon/ds9/iodevicereader.cpp b/src/3rdparty/phonon/ds9/iodevicereader.cpp new file mode 100644 index 0000000..ec10278 --- /dev/null +++ b/src/3rdparty/phonon/ds9/iodevicereader.cpp @@ -0,0 +1,228 @@ +/* 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; + mt.majortype = MEDIATYPE_Stream; + mt.bFixedSizeSamples = TRUE; + mt.bTemporalCompression = FALSE; + mt.lSampleSize = 1; + mt.formattype = GUID_NULL; + mt.pUnk = 0; + mt.cbFormat = 0; + mt.pbFormat = 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 |