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Diffstat (limited to 'examples/multimedia/spectrum/app/wavfile.cpp')
| -rw-r--r-- | examples/multimedia/spectrum/app/wavfile.cpp | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/examples/multimedia/spectrum/app/wavfile.cpp b/examples/multimedia/spectrum/app/wavfile.cpp deleted file mode 100644 index 475200db5..000000000 --- a/examples/multimedia/spectrum/app/wavfile.cpp +++ /dev/null @@ -1,158 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2017 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, you may use this file under the terms of the BSD license -** as follows: -** -** "Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions are -** met: -** * Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** * Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** * Neither the name of The Qt Company Ltd nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <qendian.h> -#include "wavfile.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; -}; - -WavFile::WavFile(QObject *parent) - : QFile(parent) - , m_headerLength(0) -{ - -} - -bool WavFile::open(const QString &fileName) -{ - close(); - setFileName(fileName); - return QFile::open(QIODevice::ReadOnly) && readHeader(); -} - -const QAudioFormat &WavFile::fileFormat() const -{ - return m_fileFormat; -} - -qint64 WavFile::headerLength() const -{ - return m_headerLength; -} - -bool WavFile::readHeader() -{ - seek(0); - CombinedHeader header; - bool result = read(reinterpret_cast<char *>(&header), sizeof(CombinedHeader)) == sizeof(CombinedHeader); - 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 || header.wave.audioFormat == 0)) { - - // Read off remaining header information - DATAHeader dataHeader; - - if (qFromLittleEndian<quint32>(header.wave.descriptor.size) > sizeof(WAVEHeader)) { - // Extended data available - quint16 extraFormatBytes; - if (peek((char*)&extraFormatBytes, sizeof(quint16)) != sizeof(quint16)) - return false; - const qint64 throwAwayBytes = sizeof(quint16) + qFromLittleEndian<quint16>(extraFormatBytes); - if (read(throwAwayBytes).size() != throwAwayBytes) - return false; - } - - if (read((char*)&dataHeader, sizeof(DATAHeader)) != sizeof(DATAHeader)) - return false; - - // Establish format - if (memcmp(&header.riff.descriptor.id, "RIFF", 4) == 0) - m_fileFormat.setByteOrder(QAudioFormat::LittleEndian); - else - m_fileFormat.setByteOrder(QAudioFormat::BigEndian); - - int bps = qFromLittleEndian<quint16>(header.wave.bitsPerSample); - m_fileFormat.setChannelCount(qFromLittleEndian<quint16>(header.wave.numChannels)); - m_fileFormat.setCodec("audio/pcm"); - m_fileFormat.setSampleRate(qFromLittleEndian<quint32>(header.wave.sampleRate)); - m_fileFormat.setSampleSize(qFromLittleEndian<quint16>(header.wave.bitsPerSample)); - m_fileFormat.setSampleType(bps == 8 ? QAudioFormat::UnSignedInt : QAudioFormat::SignedInt); - } else { - result = false; - } - } - m_headerLength = pos(); - return result; -} |