comparison audioio/AudioCallbackPlayTarget.h @ 0:db6fcbd4405c

initial import

+/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    A waveform viewer and audio annotation editor.
+    Chris Cannam, Queen Mary University of London, 2005
+    
+    This is experimental software.  Not for distribution.
+*/
+
+#ifndef _AUDIO_CALLBACK_PLAY_TARGET_H_
+#define _AUDIO_CALLBACK_PLAY_TARGET_H_
+
+#include <QObject>
+
+class AudioCallbackPlaySource;
+
+class AudioCallbackPlayTarget : public QObject
+{
+    Q_OBJECT
+
+public:
+    AudioCallbackPlayTarget(AudioCallbackPlaySource *source);
+    virtual ~AudioCallbackPlayTarget();
+
+    virtual bool isOK() const = 0;
+
+    float getOutputGain() const {
+	return m_outputGain;
+    }
+
+public slots:
+    /**
+     * Set the playback gain (0.0 = silence, 1.0 = levels unmodified)
+     */
+    virtual void setOutputGain(float gain);
+
+    virtual void sourceModelReplaced() = 0;
+
+protected:
+    AudioCallbackPlaySource *m_source;
+    float m_outputGain;
+};
+
+#endif
+