# HG changeset patch
# User Chris Cannam
# Date 1483545792 0
# Node ID 8541563f1fd3d7584e73e3a0a084f5b012580ca8
# Parent  3dcd83595bc83d5b641597c6292bbb83f05d7d10
Wire up record monitoring

diff -r 3dcd83595bc8 -r 8541563f1fd3 base/AudioPlaySource.h
--- a/base/AudioPlaySource.h	Wed Jan 04 14:22:39 2017 +0000
+++ b/base/AudioPlaySource.h	Wed Jan 04 16:03:12 2017 +0000
@@ -13,8 +13,8 @@
     COPYING included with this distribution for more information.
 */
 
-#ifndef _AUDIO_PLAY_SOURCE_H_
-#define _AUDIO_PLAY_SOURCE_H_
+#ifndef SV_AUDIO_PLAY_SOURCE_H
+#define SV_AUDIO_PLAY_SOURCE_H
 
 #include "BaseTypes.h"
 
@@ -59,7 +59,9 @@
 
     /**
      * Return the current (or thereabouts) output levels in the range
-     * 0.0 -> 1.0, for metering purposes.
+     * 0.0 -> 1.0, for metering purposes.  The values returned are
+     * peak values since the last call to this function was made
+     * (i.e. calling this function also resets them).
      */
     virtual bool getOutputLevels(float &left, float &right) = 0;
 
diff -r 3dcd83595bc8 -r 8541563f1fd3 base/AudioRecordTarget.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/base/AudioRecordTarget.h	Wed Jan 04 16:03:12 2017 +0000
@@ -0,0 +1,50 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef SV_AUDIO_RECORD_TARGET_H
+#define SV_AUDIO_RECORD_TARGET_H
+
+#include "BaseTypes.h"
+
+/**
+ * The record target API used by the view manager. See also AudioPlaySource.
+ */
+class AudioRecordTarget
+{
+public:
+    virtual ~AudioRecordTarget() { }
+
+    /**
+     * Return whether recording is currently happening.
+     */
+    virtual bool isRecording() const = 0;
+
+    /**
+     * Return the approximate duration of the audio recording so far.
+     */
+    virtual sv_frame_t getRecordDuration() const = 0;
+
+    /**
+     * Return the current (or thereabouts) input levels in the range
+     * 0.0 -> 1.0, for metering purposes. Only valid while recording.
+     * The values returned are peak values since the last call to this
+     * function was made (i.e. calling this function also resets them).
+     */
+    virtual bool getInputLevels(float &left, float &right) = 0;
+};
+
+#endif
+
+
+
diff -r 3dcd83595bc8 -r 8541563f1fd3 base/ViewManagerBase.h
--- a/base/ViewManagerBase.h	Wed Jan 04 14:22:39 2017 +0000
+++ b/base/ViewManagerBase.h	Wed Jan 04 16:03:12 2017 +0000
@@ -21,6 +21,7 @@
 #include "Selection.h"
 
 class AudioPlaySource;
+class AudioRecordTarget;
 
 /**
  * Base class for ViewManager, with no GUI content.  This should
@@ -36,6 +37,7 @@
     virtual ~ViewManagerBase();
 
     virtual void setAudioPlaySource(AudioPlaySource *source) = 0;
+    virtual void setAudioRecordTarget(AudioRecordTarget *target) = 0;
 
     virtual sv_frame_t alignPlaybackFrameToReference(sv_frame_t) const = 0;
     virtual sv_frame_t alignReferenceToPlaybackFrame(sv_frame_t) const = 0;
diff -r 3dcd83595bc8 -r 8541563f1fd3 files.pri
--- a/files.pri	Wed Jan 04 14:22:39 2017 +0000
+++ b/files.pri	Wed Jan 04 16:03:12 2017 +0000
@@ -1,6 +1,7 @@
 SVCORE_HEADERS = \
            base/AudioLevel.h \
            base/AudioPlaySource.h \
+           base/AudioRecordTarget.h \
            base/BaseTypes.h \
            base/Clipboard.h \
            base/ColumnOp.h \