author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 18 Aug 2010 10:37:55 +0300 | |
changeset 33 | 3e2da88830cd |
parent 30 | 5dc02b23752f |
permissions | -rw-r--r-- |
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/* This file is part of the KDE project. |
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Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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This library is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation, either version 2.1 or 3 of the License. |
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License |
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along with this library. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#include "iodevicereader.h" |
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#include "qasyncreader.h" |
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#include "mediagraph.h" |
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#include <phonon/streaminterface.h> |
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#include <dshow.h> |
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#include <initguid.h> |
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QT_BEGIN_NAMESPACE |
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#ifndef QT_NO_PHONON_ABSTRACTMEDIASTREAM |
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namespace Phonon |
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{ |
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namespace DS9 |
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{ |
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//these mediatypes define a stream, its type will be autodetected by DirectShow |
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static QVector<AM_MEDIA_TYPE> getMediaTypes() |
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{ |
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41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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//the order here is important because otherwise, |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
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//directshow might not be able to detect the stream type correctly |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
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41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
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AM_MEDIA_TYPE mt = { MEDIATYPE_Stream, MEDIASUBTYPE_Avi, TRUE, FALSE, 1, GUID_NULL, 0, 0, 0}; |
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QVector<AM_MEDIA_TYPE> ret; |
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//AVI stream |
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ret << mt; |
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//WAVE stream |
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mt.subtype = MEDIASUBTYPE_WAVE; |
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ret << mt; |
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41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
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//normal auto-detect stream (must be at the end!) |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
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mt.subtype = MEDIASUBTYPE_NULL; |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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ret << mt; |
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return ret; |
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} |
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class StreamReader : public QAsyncReader, public Phonon::StreamInterface |
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{ |
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public: |
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StreamReader(QBaseFilter *parent, const Phonon::MediaSource &source, const MediaGraph *mg) : |
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QAsyncReader(parent, getMediaTypes()), |
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m_seekable(false), m_pos(0), m_size(-1), m_mediaGraph(mg) |
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{ |
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connectToSource(source); |
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} |
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//for Phonon::StreamInterface |
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void writeData(const QByteArray &data) |
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{ |
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m_pos += data.size(); |
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m_buffer += data; |
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} |
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void endOfData() |
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{ |
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} |
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void setStreamSize(qint64 newSize) |
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{ |
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QMutexLocker locker(&m_mutex); |
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m_size = newSize; |
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} |
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void setStreamSeekable(bool s) |
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{ |
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QMutexLocker locker(&m_mutex); |
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m_seekable = s; |
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} |
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//virtual pure members |
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//implementation from IAsyncReader |
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STDMETHODIMP Length(LONGLONG *total, LONGLONG *available) |
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{ |
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QMutexLocker locker(&m_mutex); |
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if (total) { |
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*total = m_size; |
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} |
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if (available) { |
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*available = m_size; |
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} |
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return S_OK; |
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} |
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HRESULT read(LONGLONG pos, LONG length, BYTE *buffer, LONG *actual) |
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{ |
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Q_ASSERT(!m_mutex.tryLock()); |
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if (m_mediaGraph->isStopping()) { |
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return VFW_E_WRONG_STATE; |
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} |
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if(m_size != 1 && pos + length > m_size) { |
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//it tries to read outside of the boundaries |
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return E_FAIL; |
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} |
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if (m_pos - m_buffer.size() != pos) { |
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if (!m_seekable) { |
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return S_FALSE; |
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} |
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m_pos = pos; |
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seekStream(pos); |
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m_buffer.clear(); |
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} |
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int oldSize = m_buffer.size(); |
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while (m_buffer.size() < int(length)) { |
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needData(); |
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if (oldSize == m_buffer.size()) { |
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break; //we didn't get any data |
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} |
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oldSize = m_buffer.size(); |
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} |
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int bytesRead = qMin(m_buffer.size(), int(length)); |
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qMemCopy(buffer, m_buffer.data(), bytesRead); |
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//truncate the buffer |
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m_buffer = m_buffer.mid(bytesRead); |
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if (actual) { |
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*actual = bytesRead; //initialization |
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} |
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return bytesRead == length ? S_OK : S_FALSE; |
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} |
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public: |
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//for Phonon::StreamInterface |
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QByteArray m_buffer; |
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bool m_seekable; |
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qint64 m_pos; |
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qint64 m_size; |
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const MediaGraph *m_mediaGraph; |
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}; |
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IODeviceReader::IODeviceReader(const Phonon::MediaSource &source, const MediaGraph *mg) : |
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QBaseFilter(CLSID_NULL) |
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{ |
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//create the output pin |
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m_streamReader = new StreamReader(this, source, mg); |
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} |
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IODeviceReader::~IODeviceReader() |
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{ |
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} |
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} |
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} |
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#endif //QT_NO_PHONON_ABSTRACTMEDIASTREAM |
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QT_END_NAMESPACE |