Only dither audio when necessary

If dither is "auto", only enable dither if source depth > dest depth
Lossy codecs do not have a fixed bit depth, so we treat them as >= 24

1 files changed, 8 insertions, 2 deletions

diff --git a/libhb/common.c b/libhb/common.c
index ef067f545..3c0cc0cb5 100644
--- a/libhb/common.c
+++ b/libhb/common.c
@@ -1775,10 +1775,16 @@ int hb_audio_dither_get_default_method()
     return SWR_DITHER_TRIANGULAR;
 }
 
-int hb_audio_dither_is_supported(uint32_t codec)
+int hb_audio_dither_is_supported(uint32_t codec, int depth)
 {
     // Since dithering is performed by swresample, all codecs are supported
-    return 1;
+    switch (codec)
+    {
+        case HB_ACODEC_FFFLAC:
+            if (depth == 0 || depth > 16)
+                return 1;
+    }
+    return 0;
 }
 
 int hb_audio_dither_get_from_name(const char *name)