omx: prevent input port enable/disable for software codecs

Bug: 29421804
Change-Id: Iba1011e9af942a6dff7f659af769a51e3f5ba66f
(cherry picked from commit 2b94fa8)

Author: Wonsik Kim

media/libstagefright/omx/SimpleSoftOMXComponent.cpp

@@ -469,6 +469,13 @@ void SimpleSoftOMXComponent::onPortEnable(OMX_U32 portIndex, bool enable) {
     CHECK_EQ((int)port->mTransition, (int)PortInfo::NONE);
     CHECK(port->mDef.bEnabled == !enable);
 
+    if (port->mDef.eDir != OMX_DirOutput) {
+        ALOGE("Port enable/disable allowed only on output ports.");
+        notify(OMX_EventError, OMX_ErrorUndefined, 0, NULL);
+        android_errorWriteLog(0x534e4554, "29421804");
+        return;
+    }
+
     if (!enable) {
         port->mDef.bEnabled = OMX_FALSE;
         port->mTransition = PortInfo::DISABLING;