From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Thu, 29 Jun 2017 21:10:00 +0000 (+0200)
Subject: Don't bother adding audio for silent cards.
X-Git-Tag: 1.6.1~15
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=2d4fd36955368bc01092a9698314ff404693b105;p=nageru

Don't bother adding audio for silent cards.
---

diff --git a/mixer.cpp b/mixer.cpp
index 9c07dc5..ce00bd4 100644
--- a/mixer.cpp
+++ b/mixer.cpp
@@ -729,7 +729,9 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
 		} while (!success);
 	}
 
-	audio_mixer.add_audio(device, audio_frame.data + audio_offset, num_samples, audio_format, frame_length, audio_frame.received_timestamp);
+	if (num_samples > 0) {
+		audio_mixer.add_audio(device, audio_frame.data + audio_offset, num_samples, audio_format, frame_length, audio_frame.received_timestamp);
+	}
 
 	// Done with the audio, so release it.
 	if (audio_frame.owner) {