From 95ab4d90ad6ee7644fd9a0b0d70a59e6c6b2dbda Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Mon, 30 Jul 2012 22:05:11 +0200
Subject: AudioIn/Out classes based on Alsa.

---
 src/audioout.cc | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 src/audioout.cc

(limited to 'src/audioout.cc')

diff --git a/src/audioout.cc b/src/audioout.cc
new file mode 100644
index 0000000..0495a2c
--- /dev/null
+++ b/src/audioout.cc
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            audiooutputenginedummy.cc
+ *
+ *  Sat Apr 30 21:12:02 CEST 2011
+ *  Copyright 2011 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 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 "audioout.h"
+
+
+#define T(x, msg) if(x < 0) { printf("%s failed: %s\n", msg, snd_strerror(x)); fflush(stdout); }
+
+#define BUFSZ 40960
+
+AudioOut::AudioOut(std::string device, unsigned int srate, int channels)
+{
+  handle = NULL;
+
+  snd_pcm_uframes_t frames = 940;
+
+  int rc;
+
+  rc = snd_pcm_open(&handle, device.c_str(), SND_PCM_STREAM_PLAYBACK, 0);
+  T(rc, "snd_pcm_open");
+
+  if(!handle) {
+    printf("No handle!\n");
+    //    return false;
+  }
+
+  // Allocate a hardware parameters object.
+  snd_pcm_hw_params_alloca(&params);
+  //  if(rc < 0) return false;
+
+  // Fill it in with default values.
+  rc = snd_pcm_hw_params_any(handle, params);
+  T(rc, "snd_pcm_hw_params_any");
+
+  rc = snd_pcm_hw_params_set_access(handle, params,
+                                    SND_PCM_ACCESS_RW_INTERLEAVED);
+  T(rc, "snd_pcm_hw_params_set_access");
+
+  rc = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_FLOAT);
+  T(rc, "snd_pcm_hw_params_set_format");
+
+  rc = snd_pcm_hw_params_set_channels(handle, params, channels);
+  T(rc, "snd_pcm_hw_params_set_channels");
+
+  rc = snd_pcm_hw_params_set_rate_near(handle, params, &srate, 0);
+  T(rc, "snd_pcm_hw_params_set_rate_near");
+
+  rc = snd_pcm_hw_params_set_period_size_near(handle, params, &frames, 0);
+  T(rc, "snd_pcm_hw_params_set_period_size_near");
+  
+  rc = snd_pcm_hw_params(handle, params);
+  T(rc, "snd_pcm_hw_params");
+}
+
+AudioOut::~AudioOut()
+{
+  if(handle) snd_pcm_close(handle);
+}
+
+void AudioOut::write(sample_t *samples, size_t size)
+{
+  // Write the interleaved buffer to the soundcard
+  snd_pcm_writei(handle, samples, size);
+}
-- 
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