Add test for postproc example.

Change-Id: I3446d2ebc23e6f1ed650dd5c82648041febe3c4d

test/postproc.sh

+#!/bin/sh
+##
+##  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
+##
+##  Use of this source code is governed by a BSD-style license
+##  that can be found in the LICENSE file in the root of the source
+##  tree. An additional intellectual property rights grant can be found
+##  in the file PATENTS.  All contributing project authors may
+##  be found in the AUTHORS file in the root of the source tree.
+##
+##  This file tests the libvpx postproc example code. To add new tests to this
+##  file, do the following:
+##    1. Write a shell function (this is your test).
+##    2. Add the function to postproc_tests (on a new line).
+##
+. $(dirname $0)/tools_common.sh
+
+# Environment check: Make sure input is available:
+#   $VP8_IVF_FILE and $VP9_IVF_FILE are required.
+postproc_verify_environment() {
+  if [ ! -e "${VP8_IVF_FILE}" ] || [ ! -e "${VP9_IVF_FILE}" ]; then
+    echo "Libvpx test data must exist in LIBVPX_TEST_DATA_PATH."
+    return 1
+  fi
+}
+
+# Runs postproc using $1 as input file. $2 is the codec name, and is used
+# solely to name the output file.
+postproc() {
+  local decoder="${LIBVPX_BIN_PATH}/postproc${VPX_TEST_EXE_SUFFIX}"
+  local input_file="$1"
+  local codec="$2"
+  local output_file="${VPX_TEST_OUTPUT_DIR}/postproc_${codec}.raw"
+
+  [ -x "${decoder}" ] || return 1
+
+  eval "${decoder}" "${input_file}" "${output_file}" ${devnull}
+
+  [ -e "${output_file}" ] || return 1
+}
+
+postproc_vp8() {
+  if [ "$(vp8_decode_available)" = "yes" ]; then
+    postproc "${VP8_IVF_FILE}" vp8 || return 1
+  fi
+}
+
+postproc_vp9() {
+  if [ "$(vpx_config_option_enabled CONFIG_VP9_POSTPROC)" = "yes" ]; then
+    if [ "$(vp9_decode_available)" = "yes" ]; then
+      postproc "${VP9_IVF_FILE}" vp9 || return 1
+    fi
+  fi
+}
+
+postproc_tests="postproc_vp8
+                postproc_vp9"
+
+run_tests postproc_verify_environment "${postproc_tests}"