Fix incorrect conversion of audio from DCP sources (#642).

2 files changed, 5 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 40b78743c..fd0466ffc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2015-07-21  Carl Hetherington  <cth@carlh.net>
+
+	* Fix incorrect conversion of audio from DCP sources (#642).
+
 2015-07-20  Carl Hetherington  <cth@carlh.net>
 
 	* Version 2.1.26 released.
diff --git a/src/lib/dcp_decoder.cc b/src/lib/dcp_decoder.cc
index 531a33c03..44450f7d9 100644
--- a/src/lib/dcp_decoder.cc
+++ b/src/lib/dcp_decoder.cc
@@ -96,7 +96,7 @@ DCPDecoder::pass ()
 		shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
 		for (int i = 0; i < frames; ++i) {
 			for (int j = 0; j < channels; ++j) {
-				data->data()[j][i] = float (from[0] | (from[1] << 8) | (from[2] << 16)) / (1 << 23);
+				data->data()[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
 				from += 3;
 			}
 		}