Enable in-band FEC

In-band FEC can be used with OPUS_APPLICATION_VOIP to improve Codec robustness to packet loss and corruption. It is disabled by default:

http://opus-codec.org/docs/html_api-1.0.1/group__opus__encoderctls.html#ga5b67dc832aa46c1c2f35752c46380545

1 files changed, 7 insertions, 0 deletions

diff --git a/toxav/codec.c b/toxav/codec.c
index 71d24e87..7b76929c 100644
--- a/toxav/codec.c
+++ b/toxav/codec.c
@@ -307,6 +307,13 @@ static int init_audio_encoder(CSSession *cs)
         LOGGER_ERROR("Error while setting encoder ctl: %s", opus_strerror(rc));
         return -1;
     }
+    
+    rc = opus_encoder_ctl(cs->audio_encoder, OPUS_SET_INBAND_FEC(1));
+
+    if ( rc != OPUS_OK ) {
+        LOGGER_ERROR("Error while setting encoder ctl: %s", opus_strerror(rc));
+        return -1;
+    }
 
     rc = opus_encoder_ctl(cs->audio_encoder, OPUS_SET_COMPLEXITY(10));