99 lines
1.9 KiB
C++
99 lines
1.9 KiB
C++
#ifndef AUDIODEVICE_HPP__
|
|
#define AUDIODEVICE_HPP__
|
|
|
|
#include <QIODevice>
|
|
|
|
class QDataStream;
|
|
|
|
//
|
|
// abstract base class for audio devices
|
|
//
|
|
class AudioDevice : public QIODevice
|
|
{
|
|
public:
|
|
enum Channel {Mono, Left, Right, Both}; // these are mapped to combobox index so don't change
|
|
|
|
static char const * toString (Channel c)
|
|
{
|
|
return Mono == c ? "Mono" : Left == c ? "Left" : Right == c ? "Right" : "Both";
|
|
}
|
|
|
|
static Channel fromString (QString const& str)
|
|
{
|
|
QString s (str.toCaseFolded ().trimmed ().toLatin1 ());
|
|
return "both" == s ? Both : "right" == s ? Right : "left" == s ? Left : Mono;
|
|
}
|
|
|
|
bool initialize (OpenMode mode, Channel channel);
|
|
|
|
bool isSequential () const override {return true;}
|
|
|
|
size_t bytesPerFrame () const {return sizeof (qint16) * (Mono == m_channel ? 1 : 2);}
|
|
|
|
Channel channel () const {return m_channel;}
|
|
|
|
protected:
|
|
AudioDevice (QObject * parent = 0)
|
|
: QIODevice (parent)
|
|
{
|
|
}
|
|
|
|
void store (char const * source, size_t numFrames, qint16 * dest)
|
|
{
|
|
qint16 const * begin (reinterpret_cast<qint16 const *> (source));
|
|
for ( qint16 const * i = begin; i != begin + numFrames * (bytesPerFrame () / sizeof (qint16)); i += bytesPerFrame () / sizeof (qint16))
|
|
{
|
|
switch (m_channel)
|
|
{
|
|
case Mono:
|
|
*dest++ = *i;
|
|
break;
|
|
|
|
case Right:
|
|
*dest++ = *(i + 1);
|
|
break;
|
|
|
|
case Both: // should be able to happen but if it
|
|
// does we'll take left
|
|
Q_ASSERT (Both == m_channel);
|
|
case Left:
|
|
*dest++ = *i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
qint16 * load (qint16 const sample, qint16 * dest)
|
|
{
|
|
switch (m_channel)
|
|
{
|
|
case Mono:
|
|
*dest++ = sample;
|
|
break;
|
|
|
|
case Left:
|
|
*dest++ = sample;
|
|
*dest++ = 0;
|
|
break;
|
|
|
|
case Right:
|
|
*dest++ = 0;
|
|
*dest++ = sample;
|
|
break;
|
|
|
|
case Both:
|
|
*dest++ = sample;
|
|
*dest++ = sample;
|
|
break;
|
|
}
|
|
return dest;
|
|
}
|
|
|
|
private:
|
|
Channel m_channel;
|
|
};
|
|
|
|
Q_DECLARE_METATYPE (AudioDevice::Channel);
|
|
|
|
#endif
|