From cfa3ad358e6c0b3baec5d626783a024a3396ca1f Mon Sep 17 00:00:00 2001
From: Brian Armstrong <brian.armstrong.ece+github@gmail.com>
Date: Sat, 1 May 2021 17:56:22 -0700
Subject: [PATCH] use voice recognition preset

---
 quiet/src/main/jni/opensl.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/quiet/src/main/jni/opensl.c b/quiet/src/main/jni/opensl.c
index f9ff6da..696bc85 100644
--- a/quiet/src/main/jni/opensl.c
+++ b/quiet/src/main/jni/opensl.c
@@ -342,19 +342,27 @@ SLresult quiet_opensl_create_recorder(quiet_opensl_system *sys,
     audioSink.pFormat = (void *)&pcm;
 
     SLObjectItf recorder;
-    unsigned int num_interfaces = 1;
+    unsigned int num_interfaces = 2;
     SLInterfaceID interfaces[num_interfaces];
     SLboolean required[num_interfaces];
     interfaces[0] = SL_IID_ANDROIDSIMPLEBUFFERQUEUE;
+    interfaces[1] = SL_IID_ANDROIDCONFIGURATION;
     required[0] = SL_BOOLEAN_TRUE;
+    required[1] = SL_BOOLEAN_FALSE;
     res = (*sys->engine_itf)
               ->CreateAudioRecorder(sys->engine_itf, &recorder, &audioSource,
-                                    &audioSink, 1, interfaces, required);
+                                    &audioSink, 2, interfaces, required);
     if (res != SL_RESULT_SUCCESS) {
         return res;
     }
     recorder_deref->recorder = recorder;
 
+    SLAndroidConfigurationItf inputConfiguration;
+    if ((*recorder)->GetInterface(recorder, SL_IID_ANDROIDCONFIGURATION, &inputConfiguration) == SL_RESULT_SUCCESS) {
+        SLuint32 presetValue = SL_ANDROID_RECORDING_PRESET_VOICE_RECOGNITION;
+        (*inputConfiguration)->SetConfiguration(inputConfiguration, SL_ANDROID_KEY_RECORDING_PRESET, &presetValue, sizeof(SLuint32));
+    }
+
     res = (*recorder)->Realize(recorder, SL_BOOLEAN_FALSE);
     if (res != SL_RESULT_SUCCESS) {
         return res;