upmix mono audio channels to stereo when using PCM output on HDMI

2 files changed, 4 insertions, 0 deletions

diff --git a/HISTORY b/HISTORY
index bc5f14f..9a1363a 100644
--- a/HISTORY
+++ b/HISTORY
@@ -11,6 +11,7 @@ VDR Plugin 'rpihddevice' Revision History
   - reworked setup parameter handling
   - implemented proper command queue for OVG-OSD
 - fixed:
+  - upmix mono audio channels to stereo when using PCM output on HDMI
   - skip non-video packets in StillPicture(), fixes artifacts in PES recordings
   - skip audio substream header for PES recordings with AC3 audio track
   - reworked audio decoding loop and set correct dstSize before resampling
diff --git a/audio.c b/audio.c
index c99c51b..733fd6b 100644
--- a/audio.c
+++ b/audio.c
@@ -1151,6 +1151,9 @@ void cRpiAudioDecoder::SetCodec(cAudioCodec::eCodec codec, unsigned int &channel
 				m_passthrough = true;
 				outputFormat = codec;
 			}
+			// if we decode locally, upmix mono channels to 2.0
+			else if (channels == 1)
+				channels = 2;
 		}
 		else
 		{