decavcodec: DRC support.

Adds DRC support for E-AC-3 audio (as well as any future libavcodec decoders with DRC support).


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5995 b64f7644-9d1e-0410-96f1-a4d463321fa5

1 files changed, 22 insertions, 0 deletions

diff --git a/libhb/common.c b/libhb/common.c
index a0e6b7a58..813ece48e 100644
--- a/libhb/common.c
+++ b/libhb/common.c
@@ -3709,6 +3709,28 @@ int hb_subtitle_can_pass( int source, int mux )
     }
 }
 
+int hb_audio_can_apply_drc(uint32_t codec, uint32_t codec_param, int encoder)
+{
+    if (encoder & HB_ACODEC_PASS_FLAG)
+    {
+        // can't apply DRC to passthrough audio
+        return 0;
+    }
+    else if (codec & HB_ACODEC_FF_MASK)
+    {
+        return (codec_param == AV_CODEC_ID_AC3 ||
+                codec_param == AV_CODEC_ID_EAC3);
+    }
+    else if (codec == HB_ACODEC_AC3)
+    {
+        return 1;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
 /**********************************************************************
  * hb_metadata_init
  **********************************************************************