From 36bbd14113e25038aa490d11c7c010fcaae324a0 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 27 Jan 2015 23:13:29 +0100
Subject: [PATCH] towards fixing #5711
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Don’t call ::output() [here: SilenceTrimmer::process()]
with no data to process.

If (position + N * period-size) % chunksize == 0;
frames_left == 0 before the last call to ::output().
chunker.h:60 keeps the ProcessContext<T>::EndOfInput
flag and the SilenceTrimmer will already have done ‘in_end’ processing.
---
 libs/audiographer/audiographer/general/chunker.h         | 2 +-
 libs/audiographer/audiographer/general/silence_trimmer.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libs/audiographer/audiographer/general/chunker.h b/libs/audiographer/audiographer/general/chunker.h
index 0ee0c20b20..d61c68dee4 100644
--- a/libs/audiographer/audiographer/general/chunker.h
+++ b/libs/audiographer/audiographer/general/chunker.h
@@ -67,7 +67,7 @@ class /*LIBAUDIOGRAPHER_API*/ Chunker
 			position += frames_left;
 		}
 		
-		if (context.has_flag (ProcessContext<T>::EndOfInput)) {
+		if (context.has_flag (ProcessContext<T>::EndOfInput) && position > 0) {
 			ProcessContext<T> c_out (context, buffer, position);
 			ListedSource<T>::output (c_out);
 		}
diff --git a/libs/audiographer/audiographer/general/silence_trimmer.h b/libs/audiographer/audiographer/general/silence_trimmer.h
index c0d6d73c4b..a715feb0c8 100644
--- a/libs/audiographer/audiographer/general/silence_trimmer.h
+++ b/libs/audiographer/audiographer/general/silence_trimmer.h
@@ -128,7 +128,7 @@ class /*LIBAUDIOGRAPHER_API*/ SilenceTrimmer
 		check_flags (*this, c);
 		
 		if (throw_level (ThrowStrict) && in_end) {
-			throw Exception(*this, "process() after reacing end of input");
+			throw Exception(*this, "process() after reaching end of input");
 		}
 		in_end = c.has_flag (ProcessContext<T>::EndOfInput);