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-rw-r--r--src/multimedia/effects/qwavedecoder_p.cpp307
1 files changed, 0 insertions, 307 deletions
diff --git a/src/multimedia/effects/qwavedecoder_p.cpp b/src/multimedia/effects/qwavedecoder_p.cpp
deleted file mode 100644
index eb65a3a..0000000
--- a/src/multimedia/effects/qwavedecoder_p.cpp
+++ /dev/null
@@ -1,307 +0,0 @@
-/****************************************************************************
-**
-** 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 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 "qwavedecoder_p.h"
-
-#include <QtCore/qtimer.h>
-#include <QtCore/qendian.h>
-
-QT_BEGIN_NAMESPACE
-
-QWaveDecoder::QWaveDecoder(QIODevice *s, QObject *parent):
- QIODevice(parent),
- haveFormat(false),
- dataSize(0),
- source(s),
- state(QWaveDecoder::InitialState),
- junkToSkip(0),
- bigEndian(false)
-{
- open(QIODevice::ReadOnly | QIODevice::Unbuffered);
-
- if (enoughDataAvailable())
- QTimer::singleShot(0, this, SLOT(handleData()));
- else
- connect(source, SIGNAL(readyRead()), SLOT(handleData()));
-}
-
-QWaveDecoder::~QWaveDecoder()
-{
-}
-
-QAudioFormat QWaveDecoder::audioFormat() const
-{
- return format;
-}
-
-int QWaveDecoder::duration() const
-{
- return size() * 1000 / (format.sampleSize() / 8) / format.channels() / format.frequency();
-}
-
-qint64 QWaveDecoder::size() const
-{
- return haveFormat ? dataSize : 0;
-}
-
-bool QWaveDecoder::isSequential() const
-{
- return source->isSequential();
-}
-
-qint64 QWaveDecoder::bytesAvailable() const
-{
- return haveFormat ? source->bytesAvailable() : 0;
-}
-
-qint64 QWaveDecoder::readData(char *data, qint64 maxlen)
-{
- return haveFormat ? source->read(data, maxlen) : 0;
-}
-
-qint64 QWaveDecoder::writeData(const char *data, qint64 len)
-{
- Q_UNUSED(data);
- Q_UNUSED(len);
-
- return -1;
-}
-
-void QWaveDecoder::parsingFailed()
-{
- Q_ASSERT(source);
- source->disconnect(SIGNAL(readyRead()), this, SLOT(handleData()));
- emit parsingError();
-}
-
-void QWaveDecoder::handleData()
-{
- // As a special "state", if we have junk to skip, we do
- if (junkToSkip > 0) {
- discardBytes(junkToSkip); // this also updates junkToSkip
-
- // If we couldn't skip all the junk, return
- if (junkToSkip > 0) {
- // We might have run out
- if (source->atEnd())
- parsingFailed();
- return;
- }
- }
-
- if (state == QWaveDecoder::InitialState) {
- if (source->bytesAvailable() < qint64(sizeof(RIFFHeader)))
- return;
-
- RIFFHeader riff;
- source->read(reinterpret_cast<char *>(&riff), sizeof(RIFFHeader));
-
- // RIFF = little endian RIFF, RIFX = big endian RIFF
- if (((qstrncmp(riff.descriptor.id, "RIFF", 4) != 0) && (qstrncmp(riff.descriptor.id, "RIFX", 4) != 0))
- || qstrncmp(riff.type, "WAVE", 4) != 0) {
- parsingFailed();
- return;
- } else {
- state = QWaveDecoder::WaitingForFormatState;
- if (qstrncmp(riff.descriptor.id, "RIFX", 4) == 0)
- bigEndian = true;
- else
- bigEndian = false;
- }
- }
-
- if (state == QWaveDecoder::WaitingForFormatState) {
- if (findChunk("fmt ")) {
- chunk descriptor;
- peekChunk(&descriptor);
-
- if (source->bytesAvailable() < qint64(descriptor.size + sizeof(chunk)))
- return;
-
- WAVEHeader wave;
- source->read(reinterpret_cast<char *>(&wave), sizeof(WAVEHeader));
- if (descriptor.size > sizeof(WAVEHeader))
- discardBytes(descriptor.size - sizeof(WAVEHeader));
-
- // Swizzle this
- if (bigEndian) {
- wave.audioFormat = qFromBigEndian<quint16>(wave.audioFormat);
- }
-
- if (wave.audioFormat != 0 && wave.audioFormat != 1) {
- // 32bit wave files have format == 0xFFFE (WAVE_FORMAT_EXTENSIBLE).
- // but don't support them at the moment.
- parsingFailed();
- return;
- } else {
- format.setCodec(QLatin1String("audio/pcm"));
-
- if (bigEndian) {
- int bps = qFromBigEndian<quint16>(wave.bitsPerSample);
-
- format.setSampleType(bps == 8 ? QAudioFormat::UnSignedInt : QAudioFormat::SignedInt);
- format.setByteOrder(QAudioFormat::BigEndian);
- format.setFrequency(qFromBigEndian<quint32>(wave.sampleRate));
- format.setSampleSize(bps);
- format.setChannels(qFromBigEndian<quint16>(wave.numChannels));
- } else {
- int bps = qFromLittleEndian<quint16>(wave.bitsPerSample);
-
- format.setSampleType(bps == 8 ? QAudioFormat::UnSignedInt : QAudioFormat::SignedInt);
- format.setByteOrder(QAudioFormat::LittleEndian);
- format.setFrequency(qFromLittleEndian<quint32>(wave.sampleRate));
- format.setSampleSize(bps);
- format.setChannels(qFromLittleEndian<quint16>(wave.numChannels));
- }
-
- state = QWaveDecoder::WaitingForDataState;
- }
- }
- }
-
- if (state == QWaveDecoder::WaitingForDataState) {
- if (findChunk("data")) {
- source->disconnect(SIGNAL(readyRead()), this, SLOT(handleData()));
-
- chunk descriptor;
- source->read(reinterpret_cast<char *>(&descriptor), sizeof(chunk));
- if (bigEndian)
- descriptor.size = qFromBigEndian<quint32>(descriptor.size);
-
- dataSize = descriptor.size;
-
- haveFormat = true;
- connect(source, SIGNAL(readyRead()), SIGNAL(readyRead()));
- emit formatKnown();
-
- return;
- }
- }
-
- // If we hit the end without finding data, it's a parsing error
- if (source->atEnd()) {
- parsingFailed();
- }
-}
-
-bool QWaveDecoder::enoughDataAvailable()
-{
- chunk descriptor;
- if (!peekChunk(&descriptor))
- return false;
-
- // This is only called for the RIFF/RIFX header, before bigEndian is set,
- // so we have to manually swizzle
- if (qstrncmp(descriptor.id, "RIFX", 4) == 0)
- descriptor.size = qFromBigEndian<quint32>(descriptor.size);
-
- if (source->bytesAvailable() < qint64(sizeof(chunk) + descriptor.size))
- return false;
-
- return true;
-}
-
-bool QWaveDecoder::findChunk(const char *chunkId)
-{
- chunk descriptor;
- if (!peekChunk(&descriptor))
- return false;
-
- if (qstrncmp(descriptor.id, chunkId, 4) == 0)
- return true;
-
- // It's possible that bytes->available() is less than the chunk size
- // if it's corrupt.
- junkToSkip = qint64(sizeof(chunk) + descriptor.size);
- while (source->bytesAvailable() > 0) {
- // Skip the current amount
- if (junkToSkip > 0)
- discardBytes(junkToSkip);
-
- // If we still have stuff left, just exit and try again later
- // since we can't call peekChunk
- if (junkToSkip > 0)
- return false;
-
- if (!peekChunk(&descriptor))
- return false;
-
- if (qstrncmp(descriptor.id, chunkId, 4) == 0)
- return true;
- }
-
- return false;
-}
-
-// Handles endianness
-bool QWaveDecoder::peekChunk(chunk *pChunk)
-{
- if (source->bytesAvailable() < qint64(sizeof(chunk)))
- return false;
-
- source->peek(reinterpret_cast<char *>(pChunk), sizeof(chunk));
- if (bigEndian)
- pChunk->size = qFromBigEndian<quint32>(pChunk->size);
-
- return true;
-}
-
-void QWaveDecoder::discardBytes(qint64 numBytes)
-{
- // Discards a number of bytes
- // If the iodevice doesn't have this many bytes in it,
- // remember how much more junk we have to skip.
- if (source->isSequential()) {
- QByteArray r = source->read(qMin(numBytes, qint64(16384))); // uggh, wasted memory, limit to a max of 16k
- if (r.size() < numBytes)
- junkToSkip = numBytes - r.size();
- else
- junkToSkip = 0;
- } else {
- quint64 origPos = source->pos();
- source->seek(source->pos() + numBytes);
- junkToSkip = origPos + numBytes - source->pos();
- }
-}
-
-QT_END_NAMESPACE
-
-#include "moc_qwavedecoder_p.cpp"
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