[incomplete] added MidifileInputEngine and WavfileOutputEngine

1 files changed, 98 insertions, 0 deletions

diff --git a/drumgizmo/output/wavfile.cc b/drumgizmo/output/wavfile.cc
new file mode 100644
index 0000000..e0c18cb
--- /dev/null
+++ b/drumgizmo/output/wavfile.cc
@@ -0,0 +1,98 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            wavfile.cc
+ *
+ *  Mi 20. Jan 16:57:16 CET 2016
+ *  Copyright 2016 Christian Glöckner
+ *  cgloeckner@freenet.de
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo 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.
+ *
+ *  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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU 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 "wavfile.h"
+
+WavfileOutputEngine::WavfileOutputEngine()
+	: info{}
+	, channels{}
+	, file{"output"} {
+	info.frames = 0;
+	info.samplerrate = 44100;
+	info.channels = 1;
+	info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
+	info.sections = 0;
+	info.seekable = 0;
+}
+
+WavfileOutputEngine::~WavfileOutputEngine() {
+	for (auto& ptr: channels) {
+		if (ptr != nullptr) {
+			sf_close(ptr);
+		}
+	}
+}
+
+bool WavfileOutputEngine::init(Channels channels) {
+	channels.clear(),
+	channels.resize(channels.size(), nullptr);
+	for (auto i = 0u; i < channels.size(); ++i) {
+		// write channel to file
+		auto fname = file + channels[i]->name + "-" + std::to_string(i);
+		channels[i] = sf_open(fname, SFM_WRITE, &info);
+		if (channels[i] == nullptr) {
+			printf("Write error...\n");
+			return false;
+		}
+	}
+	return true;
+}
+
+void WavfileOutputEngine::setParm(std::string parm, std::string value) {
+	if (parm == "file") {
+		file = value;
+	} else if (parm == "srate") {[
+		info.samplerate = std::stoi(value);
+	} else {
+		printf("Unsupported wavfile parameter '%s'\n", parm);
+	}
+}
+
+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 >= channels.size()) {
+		printf("Invalid channel %d (%d channels available)", ch, channels.size());
+		return;
+	}
+	
+	sf_writef_float(channels[ch], samples, nsampels);
+}
+
+void WavfileOutputEngine::post(size_t nsamples) {
+}
+
+size_t WavfileOutputEngine::samplerate() {
+	return info.samplerate;
+}