From 36a62ae3403f7cfb02bd8dde43b6b2fa96fe867b Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 14 May 2016 20:27:56 +0200
Subject: Make all components use the same Random instance and add seed method
 on DrumGizmo class. Added dgreftest application for doing reference midifile
 rendering tests.

---
 test/dgreftest/wavfileoutputengine.cc | 125 ++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 test/dgreftest/wavfileoutputengine.cc

(limited to 'test/dgreftest/wavfileoutputengine.cc')

diff --git a/test/dgreftest/wavfileoutputengine.cc b/test/dgreftest/wavfileoutputengine.cc
new file mode 100644
index 0000000..6f971ad
--- /dev/null
+++ b/test/dgreftest/wavfileoutputengine.cc
@@ -0,0 +1,125 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            wavfileoutputengine.cc
+ *
+ *  Sat May 14 13:26:51 CEST 2016
+ *  Copyright 2016 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "wavfileoutputengine.h"
+
+#include <iostream>
+
+WavfileOutputEngine::WavfileOutputEngine()
+	: AudioOutputEngine{}
+	, info{}
+	, file{"output"}
+{
+	info.samplerate = 44100;
+	info.channels = 1;
+	info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
+}
+
+WavfileOutputEngine::~WavfileOutputEngine()
+{
+	sf_close(handle);
+}
+
+bool WavfileOutputEngine::init(const Channels& data)
+{
+	info.channels = data.size();
+
+	handle = sf_open(file.c_str(), SFM_WRITE, &info);
+	if(handle == nullptr)
+	{
+		std::cerr << "[WavfileOutputEngine] Failed to open "
+		          << file << " for writing.\n";
+		return false;
+	}
+
+	return true;
+}
+
+void WavfileOutputEngine::setParm(const std::string& parm, const std::string& value)
+{
+	if(parm == "file")
+	{
+		// apply output filename prefix
+		file = value;
+	}
+	else if(parm == "srate")
+	{
+		// try to apply samplerate
+		try
+		{
+			info.samplerate = std::stoi(value);
+		}
+		catch(...)
+		{
+			std::cerr << "[WavfileOutputEngine] Invalid samplerate " << value
+			          << "\n";
+		}
+	}
+	else
+	{
+		std::cerr << "[WavfileOutputEngine] Unsupported parameter '" << parm
+		          << "'\n";
+	}
+}
+
+bool WavfileOutputEngine::start()
+{
+	return true;
+}
+
+void WavfileOutputEngine::stop()
+{
+}
+
+void WavfileOutputEngine::pre(size_t nsamples)
+{
+}
+
+void WavfileOutputEngine::run(int ch, sample_t* samples, size_t nsamples)
+{
+	if(ch >= info.channels)
+	{
+		std::cerr << "[WavfileOutputEngine] cannot access channel #" << ch
+		          << " (" << info.channels << " channels available)\n";
+		return;
+	}
+
+	for(std::size_t i = 0; i < nsamples; ++i)
+	{
+		buffer[i * info.channels + ch] = samples[i];
+	}
+}
+
+void WavfileOutputEngine::post(size_t nsamples)
+{
+
+	sf_writef_float(handle, buffer, nsamples);
+}
+
+size_t WavfileOutputEngine::getSamplerate() const
+{
+	return info.samplerate;
+}
-- 
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