1 files changed, 106 insertions, 0 deletions
diff --git a/dgedit/player.cc b/dgedit/player.cc
new file mode 100644
index 0000000..a7f09c3
--- /dev/null
+++ b/dgedit/player.cc
@@ -0,0 +1,106 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            player.cc
+ *
+ *  Tue Apr 15 10:34:18 CEST 2014
+ *  Copyright 2014 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 "player.h"
+
+#include <math.h>
+
+#define BUFSZ 1024 * 2
+
+Player::Player(Canvas *c)
+{
+  canvas = c;
+  playing = false;
+  pos = 0;
+
+  ao_initialize();
+
+  ao_sample_format sf;
+  sf.bits = 16;
+  sf.rate = 44100;
+  sf.channels = 1;
+  sf.byte_format = AO_FMT_NATIVE;
+
+  dev = ao_open_live(ao_default_driver_id(), &sf, 0);
+
+  gain_scalar = 1000;
+
+  peak = 0;
+
+  connect(&report_timer, SIGNAL(timeout()), this, SLOT(reportTimeout()));
+  report_timer.start(50); // Update 25 times per second
+}
+
+Player::~Player()
+{
+  ao_close(dev);
+  ao_shutdown();
+}
+
+void Player::run()
+{
+  short s[BUFSZ];
+  while(true) {
+    if(playing) {
+      for(size_t i = 0; i < BUFSZ; i++) {
+        double sample = 0.0;
+        if(i + pos < canvas->size) {
+          sample = canvas->data[pos + i] * gain_scalar;
+        } else {
+          playing = false;
+        }
+        if(abs(sample) > peak) peak = abs(sample);
+        s[i] = sample * SHRT_MAX;
+      }
+
+      ao_play(dev, (char*)s, BUFSZ * sizeof(short));
+
+      pos += BUFSZ;
+
+    } else {
+      msleep(22);
+    }
+  }
+}
+
+void Player::setGainScalar(double g)
+{
+  gain_scalar = g / 10000.0;
+}
+
+void Player::setGainDB(double gain_db)
+{
+  setGainScalar(20*log10(gain_db));
+}
+
+void Player::reportTimeout()
+{
+  emit peakUpdate(peak);
+  peak = 0.0;
+
+  emit positionUpdate(pos);
+  peak = 0.0;
+}