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Diffstat (limited to 'examples/multimedia/audiodecoder/wavefilewriter.cpp')
| -rw-r--r-- | examples/multimedia/audiodecoder/wavefilewriter.cpp | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/examples/multimedia/audiodecoder/wavefilewriter.cpp b/examples/multimedia/audiodecoder/wavefilewriter.cpp deleted file mode 100644 index cb1abbc9f..000000000 --- a/examples/multimedia/audiodecoder/wavefilewriter.cpp +++ /dev/null @@ -1,204 +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 "wavefilewriter.h" - -#include <limits.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); - - -WaveFileWriter::WaveFileWriter(QObject *parent) - : QObject(parent) - , m_dataLength(0) -{ -} - -WaveFileWriter::~WaveFileWriter() -{ - close(); -} - -bool WaveFileWriter::open(const QString& fileName, const QAudioFormat& format) -{ - if (file.isOpen()) - return false; // file already open - - if (format.codec() != "audio/pcm" || format.sampleType() != QAudioFormat::SignedInt) - return false; // data format is not supported - - file.setFileName(fileName); - if (!file.open(QIODevice::WriteOnly)) - return false; // unable to open file for writing - - if (!writeHeader(format)) - return false; - - m_format = format; - return true; -} - -bool WaveFileWriter::write(const QAudioBuffer &buffer) -{ - if (buffer.format() != m_format) - return false; // buffer format has changed - - qint64 written = file.write((const char *)buffer.constData(), buffer.byteCount()); - m_dataLength += written; - return written == buffer.byteCount(); -} - -bool WaveFileWriter::close() -{ - bool result = false; - if (file.isOpen()) { - Q_ASSERT(m_dataLength < INT_MAX); - result = writeDataLength(); - - m_dataLength = 0; - file.close(); - } - return result; -} - -bool WaveFileWriter::writeHeader(const QAudioFormat &format) -{ - // check if format is supported - if (format.byteOrder() == QAudioFormat::BigEndian || format.sampleType() != QAudioFormat::SignedInt) - return false; - - CombinedHeader header; - memset(&header, 0, HeaderLength); - -#ifndef Q_LITTLE_ENDIAN - // only implemented for LITTLE ENDIAN - return false; -#else - // RIFF header - memcpy(header.riff.descriptor.id, "RIFF", 4); - header.riff.descriptor.size = 0; // this will be updated with correct duration: - // m_dataLength + HeaderLength - 8 - // WAVE header - memcpy(header.riff.type, "WAVE", 4); - memcpy(header.wave.descriptor.id, "fmt ", 4); - header.wave.descriptor.size = quint32(16); - header.wave.audioFormat = quint16(1); - header.wave.numChannels = quint16(format.channelCount()); - header.wave.sampleRate = quint32(format.sampleRate()); - header.wave.byteRate = quint32(format.sampleRate() * format.channelCount() * format.sampleSize() / 8); - header.wave.blockAlign = quint16(format.channelCount() * format.sampleSize() / 8); - header.wave.bitsPerSample = quint16(format.sampleSize()); - - // DATA header - memcpy(header.data.descriptor.id,"data", 4); - header.data.descriptor.size = 0; // this will be updated with correct data length: m_dataLength - - return (file.write(reinterpret_cast<const char *>(&header), HeaderLength) == HeaderLength); -#endif -} - -bool WaveFileWriter::writeDataLength() -{ -#ifndef Q_LITTLE_ENDIAN - // only implemented for LITTLE ENDIAN - return false; -#endif - - if (file.isSequential()) - return false; - - // seek to RIFF header size, see header.riff.descriptor.size above - if (!file.seek(4)) - return false; - - quint32 length = m_dataLength + HeaderLength - 8; - if (file.write(reinterpret_cast<const char *>(&length), 4) != 4) - return false; - - // seek to DATA header size, see header.data.descriptor.size above - if (!file.seek(40)) - return false; - - return file.write(reinterpret_cast<const char *>(&m_dataLength), 4) == 4; -} |