first work to get alsa audio output

Introduce a iAudio class - will be later base class for oss and alas
output -, which handles volume and channel handling.

1 files changed, 41 insertions, 0 deletions

diff --git a/dxr3audio.h b/dxr3audio.h
new file mode 100644
index 0000000..8ac071f
--- /dev/null
+++ b/dxr3audio.h
@@ -0,0 +1,41 @@
+/*
+ *
+ * Copyright (C) 2009 Christian Gmeiner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef _AUDIO_H_
+#define _AUDIO_H_
+
+class iAudio {
+public:
+    iAudio() : vol(0), audioChannel(0)  {}
+    virtual ~iAudio() {}
+
+    void setVolume(int v)   { vol = v; }
+    void mute()             { setVolume(0); }
+
+    void changeVolume(short* pcmbuf, size_t size);
+    void setAudioChannel(int channel)   { audioChannel = channel; }
+    int getAudioChannel()               { return audioChannel; }
+
+protected:
+    int vol;
+    int audioChannel;
+};
+
+#endif /*_AUDIO_H_*/