Add AudioDriver interface

1 files changed, 48 insertions, 0 deletions

diff --git a/src/AudioDriver.hpp b/src/AudioDriver.hpp
new file mode 100644
index 0000000..7e1e5a7
--- /dev/null
+++ b/src/AudioDriver.hpp
@@ -0,0 +1,48 @@
+/* This file is part of Patchage.
+ * Copyright 2007-2020 David Robillard <d@drobilla.net>
+ *
+ * Patchage 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 3 of the License, or (at your option)
+ * any later version.
+ *
+ * Patchage 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 details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Patchage.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PATCHAGE_AUDIODRIVER_HPP
+#define PATCHAGE_AUDIODRIVER_HPP
+
+#include "Driver.hpp"
+
+#include <cstdint>
+
+/// Base class for drivers that work with an audio system
+class AudioDriver : public Driver
+{
+public:
+	explicit AudioDriver(EventSink emit_event)
+	    : Driver{std::move(emit_event)}
+	{}
+
+	/// Return the number of xruns (dropouts) since the last reset
+	virtual uint32_t xruns() = 0;
+
+	/// Reset the xrun count
+	virtual void reset_xruns() = 0;
+
+	/// Return the current buffer size in frames
+	virtual uint32_t buffer_size() = 0;
+
+	/// Try to set the current buffer size in frames, return true on success
+	virtual bool set_buffer_size(uint32_t frames) = 0;
+
+	/// Return the current sample rate in Hz
+	virtual uint32_t sample_rate() = 0;
+};
+
+#endif // PATCHAGE_AUDIODRIVER_HPP