From 6253e37c2f0219d61193d0d405e7f23a4bae3287 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20Gl=C3=B6ckner?= Date: Thu, 21 Jan 2016 18:00:28 +0100 Subject: Added AlsaOutputEngine --- drumgizmo/output/alsa.h | 62 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 drumgizmo/output/alsa.h (limited to 'drumgizmo/output/alsa.h') diff --git a/drumgizmo/output/alsa.h b/drumgizmo/output/alsa.h new file mode 100644 index 0000000..c7585e0 --- /dev/null +++ b/drumgizmo/output/alsa.h @@ -0,0 +1,62 @@ +/* -*- 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 +#include + +#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 data; + size_t num_channels; + + std::string dev; + unsigned int srate; // samplerate + snd_pcm_uframes_t frames; +}; -- cgit v1.2.3