1 files changed, 26 insertions, 0 deletions
diff --git a/src/lib/gain.cc b/src/lib/gain.cc
new file mode 100644
index 000000000..80d3b7c72
--- /dev/null
+++ b/src/lib/gain.cc
@@ -0,0 +1,26 @@
+#include "gain.h"
+
+using boost::shared_ptr;
+
+/** @param gain gain in dB */
+Gain::Gain (Log* log, float gain)
+	: AudioProcessor (log)
+	, _gain (gain)
+{
+
+}
+
+void
+Gain::process_audio (shared_ptr<AudioBuffers> b)
+{
+	if (_gain != 0) {
+		float const linear_gain = pow (10, _gain / 20);
+		for (int i = 0; i < b->channels(); ++i) {
+			for (int j = 0; j < b->frames(); ++j) {
+				b->data(i)[j] *= linear_gain;
+			}
+		}
+	}
+
+	Audio (b);
+}