Remove unused functions from libstagefright_m4vh263dec

Post processing modules are now disabled during build
as these were never called earlier

Test: Build libstagefright_m4vh263dec
Bug: 150440419

Change-Id: I155cb5ee78cd2dc730d7df1a6ec3f667bcab1e4f
diff --git a/media/libstagefright/codecs/m4v_h263/dec/Android.bp b/media/libstagefright/codecs/m4v_h263/dec/Android.bp
index b8b83d5..1d7c703 100644
--- a/media/libstagefright/codecs/m4v_h263/dec/Android.bp
+++ b/media/libstagefright/codecs/m4v_h263/dec/Android.bp
@@ -47,6 +47,7 @@
         "-DOSCL_IMPORT_REF=",
 
         "-Werror",
+        "-DDEC_NOPOSTPROC",
     ],
 
     version_script: "exports.lds",
diff --git a/media/libstagefright/codecs/m4v_h263/dec/src/pvdec_api.cpp b/media/libstagefright/codecs/m4v_h263/dec/src/pvdec_api.cpp
index 9c0fcfa..6c336c8 100644
--- a/media/libstagefright/codecs/m4v_h263/dec/src/pvdec_api.cpp
+++ b/media/libstagefright/codecs/m4v_h263/dec/src/pvdec_api.cpp
@@ -830,7 +830,14 @@
 OSCL_EXPORT_REF void PVSetPostProcType(VideoDecControls *decCtrl, int mode)
 {
     VideoDecData *video = (VideoDecData *)decCtrl->videoDecoderData;
+#ifdef PV_POSTPROC_ON
     video->postFilterType = mode;
+#else
+    if (mode != 0) {
+        ALOGE("Post processing filters are not supported");
+    }
+    video->postFilterType = 0;
+#endif
 }