changeset 476:f4d1fa41b94b recording

Basic recording stuff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/audio/AudioRecordTarget.cpp	Tue Aug 18 15:00:34 2015 +0100
@@ -0,0 +1,126 @@
+/* -*- 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.
+*/
+
+#include "AudioRecordTarget.h"
+
+#include "base/ViewManagerBase.h"
+#include "base/TempDirectory.h"
+
+#include "data/fileio/WavFileWriter.h"
+
+#include <QDir>
+
+AudioRecordTarget::AudioRecordTarget(ViewManagerBase *manager,
+				     QString clientName) :
+    m_viewManager(manager),
+    m_clientName(clientName.toUtf8().data()),
+    m_recording(false),
+    m_recordSampleRate(44100),
+    m_writer(0)
+{
+}
+
+AudioRecordTarget::~AudioRecordTarget()
+{
+    QMutexLocker locker(&m_mutex);
+    delete m_writer;
+}
+
+void
+AudioRecordTarget::setSystemRecordBlockSize(int sz)
+{
+}
+
+void
+AudioRecordTarget::setSystemRecordSampleRate(int n)
+{
+    m_recordSampleRate = n;
+}
+
+void
+AudioRecordTarget::setSystemRecordLatency(int sz)
+{
+}
+
+void
+AudioRecordTarget::putSamples(int nframes, float **samples)
+{
+    QMutexLocker locker(&m_mutex); //!!! bad here
+    if (!m_recording) return;
+    m_writer->writeSamples(samples, nframes);
+}
+
+void
+AudioRecordTarget::setInputLevels(float peakLeft, float peakRight)
+{
+}
+
+QString
+AudioRecordTarget::startRecording()
+{
+    QMutexLocker locker(&m_mutex);
+    if (m_recording) {
+        cerr << "WARNING: AudioRecordTarget::startRecording: We are already recording" << endl;
+        return "";
+    }
+
+    QDir parent(TempDirectory::getInstance()->getContainingPath());
+    QDir recordedDir;
+    QString subdirname = "recorded"; //!!! tr?
+    if (!parent.mkpath(subdirname)) {
+        cerr << "ERROR: AudioRecordTarget::startRecording: Failed to create recorded dir in \"" << parent.canonicalPath() << "\"" << endl;
+        return "";
+    } else {
+        recordedDir = parent.filePath(subdirname);
+    }
+
+    //!!! todo proper temp name as in TempDirectory
+
+    QString filename = "recorded.wav"; //!!!
+
+    m_audioFileName = recordedDir.filePath(filename);
+        
+    m_writer = new WavFileWriter(m_audioFileName,
+                                 m_recordSampleRate,
+                                 2,
+                                 WavFileWriter::WriteToTarget);
+
+    if (!m_writer->isOK()) {
+        cerr << "ERROR: AudioRecordTarget::startRecording: Recording failed: "
+             << m_writer->getError() << endl;
+        //!!! and throw?
+        delete m_writer;
+        return "";
+    }
+
+    m_recording = true;
+    
+    return m_audioFileName;
+}
+
+void
+AudioRecordTarget::stopRecording()
+{
+    QMutexLocker locker(&m_mutex);
+    if (!m_recording) {
+        cerr << "WARNING: AudioRecordTarget::startRecording: Not recording" << endl;
+        return;
+    }
+
+    m_writer->close();
+    delete m_writer;
+    m_recording = false;
+}
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/audio/AudioRecordTarget.h	Tue Aug 18 15:00:34 2015 +0100
@@ -0,0 +1,67 @@
+/* -*- 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 AUDIO_RECORD_TARGET_H
+#define AUDIO_RECORD_TARGET_H
+
+#include <bqaudioio/ApplicationRecordTarget.h>
+
+#include <string>
+
+#include <QObject>
+#include <QMutex>
+
+#include "base/BaseTypes.h"
+
+class ViewManagerBase;
+class WavFileWriter;
+
+class AudioRecordTarget : public QObject,
+			  public breakfastquay::ApplicationRecordTarget
+{
+    Q_OBJECT
+
+public:
+    AudioRecordTarget(ViewManagerBase *, QString clientName);
+    virtual ~AudioRecordTarget();
+
+    virtual std::string getClientName() const { return m_clientName; }
+    
+    virtual int getApplicationSampleRate() const { return 0; } // don't care
+    virtual int getApplicationChannelCount() const { return 2; }
+
+    virtual void setSystemRecordBlockSize(int);
+    virtual void setSystemRecordSampleRate(int);
+    virtual void setSystemRecordLatency(int);
+
+    virtual void putSamples(int nframes, float **samples);
+    
+    virtual void setInputLevels(float peakLeft, float peakRight);
+
+    virtual void audioProcessingOverload() { }
+
+    QString startRecording(); // and return the audio filename
+    void stopRecording();
+    
+private:
+    ViewManagerBase *m_viewManager;
+    std::string m_clientName;
+    bool m_recording;
+    sv_samplerate_t m_recordSampleRate;
+    QString m_audioFileName;
+    WavFileWriter *m_writer;
+    QMutex m_mutex;
+};
+
+#endif