From 4f4b11c2398e96134dc62ee794bfe33ecd6e9bd2 Mon Sep 17 00:00:00 2001
From: Gustaf Ullberg <gustaf.ullberg@gmail.com>
Date: Thu, 20 Dec 2018 15:35:41 +0100
Subject: API for checking whether the encoder is in DTX

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
---
 src/opus_encoder.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'src')

diff --git a/src/opus_encoder.c b/src/opus_encoder.c
index 2768aa37..e98ac5b8 100644
--- a/src/opus_encoder.c
+++ b/src/opus_encoder.c
@@ -2727,6 +2727,33 @@ int opus_encoder_ctl(OpusEncoder *st, int request, ...)
             ret = celt_encoder_ctl(celt_enc, OPUS_SET_ENERGY_MASK(value));
         }
         break;
+        case OPUS_GET_IN_DTX_REQUEST:
+        {
+            opus_int32 *value = va_arg(ap, opus_int32*);
+            if (!value)
+            {
+                goto bad_arg;
+            }
+            if (st->silk_mode.useDTX && (st->prev_mode == MODE_SILK_ONLY || st->prev_mode == MODE_HYBRID)) {
+                /* DTX determined by Silk. */
+                int n;
+                void *silk_enc = (char*)st+st->silk_enc_offset;
+                *value = 1;
+                for (n=0;n<st->silk_mode.nChannelsInternal;n++) {
+                    *value = *value && ((silk_encoder*)silk_enc)->state_Fxx[n].sCmn.noSpeechCounter >= NB_SPEECH_FRAMES_BEFORE_DTX;
+                }
+            }
+#ifndef DISABLE_FLOAT_API
+            else if (st->use_dtx) {
+                /* DTX determined by Opus. */
+                *value = st->nb_no_activity_frames >= NB_SPEECH_FRAMES_BEFORE_DTX;
+            }
+#endif
+            else {
+                *value = 0;
+            }
+        }
+        break;
 
         case CELT_GET_MODE_REQUEST:
         {
-- 
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