audiofx: Don't auto-attach if a recording is active

 * Some apps use loopback over the headphone path to perform various
   functions and tests.  Disable auto-attach if this is detected
   since we don't want to interfere with it.

Change-Id: I5143fb5b10abc5840331b3393cd12d78c6c43091

1 files changed, 7 insertions, 0 deletions

diff --git a/src/com/cyngn/audiofx/service/SessionManager.java b/src/com/cyngn/audiofx/service/SessionManager.java
index 188932b..ac1e0b8 100644
--- a/src/com/cyngn/audiofx/service/SessionManager.java
+++ b/src/com/cyngn/audiofx/service/SessionManager.java
@@ -122,6 +122,13 @@ class SessionManager extends AudioOutputChangeListener implements AudioSystem.Ef
                 || (flags & AudioFxService.AUDIO_OUTPUT_FLAG_DEEP_BUFFER) > 0;
         final boolean stereo = channelMask < 0 || channelMask > 1;
 
+        // Never auto-attach is someone is recording! We don't want to interfere with any sort of
+        // loopback mechanisms.
+        final boolean recording = AudioSystem.isSourceActive(0) || AudioSystem.isSourceActive(6);
+        if (recording) {
+            Log.w(TAG, "Recording in progress, not performing auto-attach!");
+            return;
+        }
         if (music && offloaded && stereo && !mHandler.hasMessages(MSG_ADD_SESSION, sessionId)) {
             if (DEBUG) Log.i(TAG, String.format("New audio session: %d [flags=%d channelMask=%d uid=%d]",
                     sessionId, flags, channelMask, uid));