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Diffstat (limited to 'tests/auto/qaudiooutput/wavheader.cpp')
| -rwxr-xr-x | tests/auto/qaudiooutput/wavheader.cpp | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/tests/auto/qaudiooutput/wavheader.cpp b/tests/auto/qaudiooutput/wavheader.cpp new file mode 100755 index 000000000..26fcd6f98 --- /dev/null +++ b/tests/auto/qaudiooutput/wavheader.cpp @@ -0,0 +1,205 @@ +/**************************************************************************** +** +** 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 test suite of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtCore/qendian.h> +#include "wavheader.h" + + +struct chunk +{ + char id[4]; + quint32 size; +}; + +struct RIFFHeader +{ + chunk descriptor; // "RIFF" + char type[4]; // "WAVE" +}; + +struct WAVEHeader +{ + chunk descriptor; + quint16 audioFormat; + quint16 numChannels; + quint32 sampleRate; + quint32 byteRate; + quint16 blockAlign; + quint16 bitsPerSample; +}; + +struct DATAHeader +{ + chunk descriptor; +}; + +struct CombinedHeader +{ + RIFFHeader riff; + WAVEHeader wave; + DATAHeader data; +}; + +static const int HeaderLength = sizeof(CombinedHeader); + + +WavHeader::WavHeader(const QAudioFormat &format, qint64 dataLength) + : m_format(format) + , m_dataLength(dataLength) +{ + +} + +bool WavHeader::read(QIODevice &device) +{ + bool result = true; + + if (!device.isSequential()) + result = device.seek(0); + // else, assume that current position is the start of the header + + if (result) { + CombinedHeader header; + result = (device.read(reinterpret_cast<char *>(&header), HeaderLength) == HeaderLength); + if (result) { + if ((memcmp(&header.riff.descriptor.id, "RIFF", 4) == 0 + || memcmp(&header.riff.descriptor.id, "RIFX", 4) == 0) + && memcmp(&header.riff.type, "WAVE", 4) == 0 + && memcmp(&header.wave.descriptor.id, "fmt ", 4) == 0 + && header.wave.audioFormat == 1 // PCM + ) { + if (memcmp(&header.riff.descriptor.id, "RIFF", 4) == 0) + m_format.setByteOrder(QAudioFormat::LittleEndian); + else + m_format.setByteOrder(QAudioFormat::BigEndian); + + m_format.setChannels(qFromLittleEndian<quint16>(header.wave.numChannels)); + m_format.setCodec("audio/pcm"); + m_format.setFrequency(qFromLittleEndian<quint32>(header.wave.sampleRate)); + m_format.setSampleSize(qFromLittleEndian<quint16>(header.wave.bitsPerSample)); + + switch(header.wave.bitsPerSample) { + case 8: + m_format.setSampleType(QAudioFormat::UnSignedInt); + break; + case 16: + m_format.setSampleType(QAudioFormat::SignedInt); + break; + default: + result = false; + } + + m_dataLength = device.size() - HeaderLength; + } else { + result = false; + } + } + } + + return result; +} + +bool WavHeader::write(QIODevice &device) +{ + CombinedHeader header; + + memset(&header, 0, HeaderLength); + + // RIFF header + if (m_format.byteOrder() == QAudioFormat::LittleEndian) + memcpy(header.riff.descriptor.id,"RIFF",4); + else + memcpy(header.riff.descriptor.id,"RIFX",4); + qToLittleEndian<quint32>(quint32(m_dataLength + HeaderLength - 8), + reinterpret_cast<unsigned char*>(&header.riff.descriptor.size)); + memcpy(header.riff.type, "WAVE",4); + + // WAVE header + memcpy(header.wave.descriptor.id,"fmt ",4); + qToLittleEndian<quint32>(quint32(16), + reinterpret_cast<unsigned char*>(&header.wave.descriptor.size)); + qToLittleEndian<quint16>(quint16(1), + reinterpret_cast<unsigned char*>(&header.wave.audioFormat)); + qToLittleEndian<quint16>(quint16(m_format.channels()), + reinterpret_cast<unsigned char*>(&header.wave.numChannels)); + qToLittleEndian<quint32>(quint32(m_format.frequency()), + reinterpret_cast<unsigned char*>(&header.wave.sampleRate)); + qToLittleEndian<quint32>(quint32(m_format.frequency() * m_format.channels() * m_format.sampleSize() / 8), + reinterpret_cast<unsigned char*>(&header.wave.byteRate)); + qToLittleEndian<quint16>(quint16(m_format.channels() * m_format.sampleSize() / 8), + reinterpret_cast<unsigned char*>(&header.wave.blockAlign)); + qToLittleEndian<quint16>(quint16(m_format.sampleSize()), + reinterpret_cast<unsigned char*>(&header.wave.bitsPerSample)); + + // DATA header + memcpy(header.data.descriptor.id,"data",4); + qToLittleEndian<quint32>(quint32(m_dataLength), + reinterpret_cast<unsigned char*>(&header.data.descriptor.size)); + + return (device.write(reinterpret_cast<const char *>(&header), HeaderLength) == HeaderLength); +} + +const QAudioFormat& WavHeader::format() const +{ + return m_format; +} + +qint64 WavHeader::dataLength() const +{ + return m_dataLength; +} + +qint64 WavHeader::headerLength() +{ + return HeaderLength; +} + +bool WavHeader::writeDataLength(QIODevice &device, qint64 dataLength) +{ + bool result = false; + if (!device.isSequential()) { + device.seek(40); + unsigned char dataLengthLE[4]; + qToLittleEndian<quint32>(quint32(dataLength), dataLengthLE); + result = (device.write(reinterpret_cast<const char *>(dataLengthLE), 4) == 4); + } + return result; +} |