1 files changed, 43 insertions, 0 deletions
diff --git a/cmds/bootanimation/BootAnimationUtil.cpp b/cmds/bootanimation/BootAnimationUtil.cpp
index 7718daf61d81..1e417e938359 100644
--- a/cmds/bootanimation/BootAnimationUtil.cpp
+++ b/cmds/bootanimation/BootAnimationUtil.cpp
@@ -16,14 +16,30 @@
 
 #include "BootAnimationUtil.h"
 
+#include <vector>
 #include <inttypes.h>
 
 #include <binder/IServiceManager.h>
 #include <cutils/properties.h>
 #include <utils/Log.h>
 #include <utils/SystemClock.h>
+#include <android-base/properties.h>
 
 namespace android {
+namespace {
+
+static constexpr char PLAY_SOUND_PROP_NAME[] = "persist.sys.bootanim.play_sound";
+static constexpr char BOOT_COMPLETED_PROP_NAME[] = "sys.boot_completed";
+static constexpr char POWER_CTL_PROP_NAME[] = "sys.powerctl";
+static constexpr char BOOTREASON_PROP_NAME[] = "ro.boot.bootreason";
+static const std::vector<std::string> PLAY_SOUND_BOOTREASON_BLACKLIST {
+  "kernel_panic",
+  "Panic",
+  "Watchdog",
+};
+
+}  // namespace
+
 
 bool bootAnimationDisabled() {
     char value[PROPERTY_VALUE_MAX];
@@ -58,4 +74,31 @@ void waitForSurfaceFlinger() {
     }
 }
 
+bool playSoundsAllowed() {
+    // Only play sounds for system boots, not runtime restarts.
+    if (android::base::GetBoolProperty(BOOT_COMPLETED_PROP_NAME, false)) {
+        return false;
+    }
+    // no audio while shutting down
+    if (!android::base::GetProperty(POWER_CTL_PROP_NAME, "").empty()) {
+        return false;
+    }
+    // Read the system property to see if we should play the sound.
+    // If it's not present, default to allowed.
+    if (!property_get_bool(PLAY_SOUND_PROP_NAME, 1)) {
+        return false;
+    }
+
+    // Don't play sounds if this is a reboot due to an error.
+    char bootreason[PROPERTY_VALUE_MAX];
+    if (property_get(BOOTREASON_PROP_NAME, bootreason, nullptr) > 0) {
+        for (const auto& str : PLAY_SOUND_BOOTREASON_BLACKLIST) {
+            if (strcasecmp(str.c_str(), bootreason) == 0) {
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
 }  // namespace android