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authorChristian Glöckner <cgloeckner@freenet.de>2016-01-21 18:00:28 +0100
committerAndré Nusser <andre.nusser@googlemail.com>2016-02-09 09:02:18 +0100
commit6253e37c2f0219d61193d0d405e7f23a4bae3287 (patch)
tree28f687ca1327cec4cac848a80eb82cd8128ded27 /drumgizmo/output/alsa.h
parent3ab30fd4168217894ee781cf93df522d3565cec8 (diff)
Added AlsaOutputEngine
Diffstat (limited to 'drumgizmo/output/alsa.h')
-rw-r--r--drumgizmo/output/alsa.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/drumgizmo/output/alsa.h b/drumgizmo/output/alsa.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * alsa.h
+ *
+ * Do 21. Jan 16:48:32 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.
+ */
+#pragma once
+
+// Use the newer ALSA API
+#define ALSA_PCM_NEW_HW_PARAMS_API
+
+#include <audiotypes.h>
+#include <alsa/asoundlib.h>
+
+#include "audiooutputengine.h"
+
+class AlsaOutputEngine
+ : public AudioOutputEngine {
+ public:
+ AlsaOutputEngine();
+ ~AlsaOutputEngine();
+
+ // based on AudioOutputEngine
+ bool init(Channels chan) override;
+ void setParm(std::string parm, std::string value) override;
+ bool start() override;
+ void stop() override;
+ void pre(size_t nsamples) override;
+ void run(int ch, sample_t* samples, size_t nsamples) override;
+ void post(size_t nsamples) override;
+ size_t samplerate() override;
+
+ private:
+ snd_pcm_t* handle;
+ snd_pcm_hw_params_t* params;
+ std::vector<sample_t> data;
+ size_t num_channels;
+
+ std::string dev;
+ unsigned int srate; // samplerate
+ snd_pcm_uframes_t frames;
+};