transcodebin: force decoding if a filter is defined

Filter operates on raw data so don't allow decodebin to produce
encoded data if one is defined.

My use case here is keeping the video stream untouched but apply a filter
on the audio one, while keeping the same audio format.

diff --git a/gst/transcode/gsttranscodebin.c b/gst/transcode/gsttranscodebin.c
index 1d8b507..f1362f1 100644 (file)
--- a/gst/transcode/gsttranscodebin.c
+++ b/gst/transcode/gsttranscodebin.c
@@ -306,13 +306,29 @@ make_decodebin (GstTranscodeBin * self)
           gst_encoding_container_profile_get_profiles
           (GST_ENCODING_CONTAINER_PROFILE (self->profile)); tmp;
           tmp = tmp->next) {
-        GstCaps *restrictions =
-            gst_encoding_profile_get_restriction (tmp->data);
+        GstEncodingProfile *profile = tmp->data;
+        GstCaps *restrictions;
 
-        if (!restrictions || gst_caps_is_any (restrictions)) {
-          GstCaps *encodecaps = gst_encoding_profile_get_format (tmp->data);
+        restrictions = gst_encoding_profile_get_restriction (profile);
 
-          gst_caps_append (decodecaps, encodecaps);
+        if (!restrictions || gst_caps_is_any (restrictions)) {
+          GstCaps *encodecaps = gst_encoding_profile_get_format (profile);
+          GstElement *filter = NULL;
+
+          /* Filter operates on raw data so don't allow decodebin to produce
+           * encoded data if one is defined. */
+          if (GST_IS_ENCODING_VIDEO_PROFILE (profile) && self->video_filter)
+            filter = self->video_filter;
+          else if (GST_IS_ENCODING_AUDIO_PROFILE (profile)
+              && self->audio_filter)
+            filter = self->audio_filter;
+
+          if (!filter) {
+            GST_DEBUG_OBJECT (self,
+                "adding %" GST_PTR_FORMAT " as output caps to decodebin",
+                encodecaps);
+            gst_caps_append (decodecaps, encodecaps);
+          }
         } else {
           gst_caps_unref (restrictions);
         }