1 files changed, 50 insertions, 0 deletions
diff --git a/src/audio/backend/silent_backend.cc b/src/audio/backend/silent_backend.cc
new file mode 100644
index 0000000..637dd68
--- /dev/null
+++ b/src/audio/backend/silent_backend.cc
@@ -0,0 +1,50 @@
+// This file is part of the 64k demo project.
+// Implementation of silent backend for testing audio.cc.
+
+#include "silent_backend.h"
+
+#if !defined(STRIP_ALL)
+
+SilentBackend::SilentBackend()
+    : initialized_(false), started_(false), frames_rendered_(0),
+      voice_trigger_count_(0), test_peak_(0.0f) {
+}
+
+SilentBackend::~SilentBackend() {
+  shutdown();
+}
+
+void SilentBackend::init() {
+  initialized_ = true;
+}
+
+void SilentBackend::start() {
+  started_ = true;
+}
+
+void SilentBackend::shutdown() {
+  initialized_ = false;
+  started_ = false;
+}
+
+float SilentBackend::get_realtime_peak() {
+  // Return controllable test peak
+  return test_peak_;
+}
+
+void SilentBackend::on_voice_triggered(float timestamp, int spectrogram_id,
+                                        float volume, float pan) {
+  // Track voice triggers for testing
+  (void)timestamp;
+  (void)spectrogram_id;
+  (void)volume;
+  (void)pan;
+  voice_trigger_count_.fetch_add(1);
+}
+
+void SilentBackend::on_frames_rendered(int num_frames) {
+  // Track total frames rendered for testing
+  frames_rendered_.fetch_add(num_frames);
+}
+
+#endif /* !defined(STRIP_ALL) */