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File Input: Fix seeking over .wav header

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This commit is contained in:
srcejon 2024-01-04 16:14:00 +00:00
parent d259443203
commit d496744c2a
2 changed files with 11 additions and 8 deletions
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18
plugins/samplesource/fileinput/fileinput.cpp
View File

@ -61,6 +61,7 @@ FileInput::FileInput(DeviceAPI *deviceAPI) :
m_sampleRate(48000),
m_sampleSize(0),
m_centerFrequency(435000000),
m_dataStartPos(0),
m_recordLengthMuSec(0),
m_startingTimeStamp(0)
{
@ -156,11 +157,11 @@ void FileInput::openFileStream()
if (headerOK && (m_sampleRate > 0) && (m_sampleSize > 0))
{
#ifdef ANDROID
qint64 pos = m_inputFile.pos();
m_dataStartPos = m_inputFile.pos();
#else
qint64 pos = m_ifstream.tellg();
m_dataStartPos = m_ifstream.tellg();
#endif
m_recordLengthMuSec = ((fileSize - pos) * 1000000UL) / ((m_sampleSize == 24 ? 8 : 4) * m_sampleRate);
m_recordLengthMuSec = ((fileSize - m_dataStartPos) * 1000000UL) / ((m_sampleSize == 24 ? 8 : 4) * m_sampleRate);
}
else
{
@ -184,7 +185,8 @@ void FileInput::openFileStream()
m_ifstream.seekg(0,std::ios_base::beg);
bool crcOK = FileRecord::readHeader(m_ifstream, header);
#endif
m_sampleRate = header.sampleRate;
m_dataStartPos = sizeof(FileRecord::Header);
m_sampleRate = header.sampleRate;
m_centerFrequency = header.centerFrequency;
m_startingTimeStamp = header.startTimeStamp;
m_sampleSize = header.sampleSize;
@ -193,7 +195,7 @@ void FileInput::openFileStream()
if (crcOK && (m_sampleRate > 0) && (m_sampleSize > 0))
{
qDebug("FileInput::openFileStream: CRC32 OK for header: %s", qPrintable(crcHex));
m_recordLengthMuSec = ((fileSize - sizeof(FileRecord::Header)) * 1000000UL) / ((m_sampleSize == 24 ? 8 : 4) * m_sampleRate);
m_recordLengthMuSec = ((fileSize - m_dataStartPos) * 1000000UL) / ((m_sampleSize == 24 ? 8 : 4) * m_sampleRate);
}
else if (!crcOK)
{
@ -260,12 +262,12 @@ void FileInput::seekFileStream(int seekMillis)
quint64 seekPoint = ((m_recordLengthMuSec * seekMillis) / 1000) * m_sampleRate;
seekPoint /= 1000000UL;
m_fileInputWorker->setSamplesCount(seekPoint);
seekPoint *= (m_sampleSize == 24 ? 8 : 4); // + sizeof(FileRecord::Header)
seekPoint *= (m_sampleSize == 24 ? 8 : 4);
#ifdef ANDROID
m_inputFile.seek(seekPoint + sizeof(FileRecord::Header));
m_inputFile.seek(seekPoint + m_dataStartPos);
#else
m_ifstream.clear();
m_ifstream.seekg(seekPoint + sizeof(FileRecord::Header), std::ios::beg);
m_ifstream.seekg(seekPoint + m_dataStartPos, std::ios::beg);
#endif
}
}

1
plugins/samplesource/fileinput/fileinput.h
View File

@ -350,6 +350,7 @@ public:
int m_sampleRate;
quint32 m_sampleSize;
quint64 m_centerFrequency;
qint64 m_dataStartPos; //!< Position of IQ data in file
quint64 m_recordLengthMuSec; //!< record length in microseconds computed from file size
quint64 m_startingTimeStamp;
QTimer m_masterTimer;