Add tests for the decode_with_drops example.

Change-Id: I99e120f934613fb7cc0ef4b4bba0c8caaecf18d2

test/decode_with_drops.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 decode_with_drops example. To add new tests to
+##  this file, do the following:
+##    1. Write a shell function (this is your test).
+##    2. Add the function to decode_with_drops_tests (on a new line).
+##
+. $(dirname $0)/tools_common.sh
+
+# Environment check: Make sure input is available:
+#   $VP8_IVF_FILE and $VP9_IVF_FILE are required.
+decode_with_drops_verify_environment() {
+  if [ ! -e "${VP8_IVF_FILE}" ] || [ ! -e "${VP9_IVF_FILE}" ]; then
+    echo "Libvpx test data must exist in LIBVPX_TEST_DATA_PATH."
+    return 1
+  fi
+}
+
+# Runs decode_with_drops on $1, $2 is interpreted as codec name and used solely
+# to name the output file. $3 is the drop mode, and is passed directly to
+# decode_with_drops.
+decode_with_drops() {
+  local decoder="${LIBVPX_BIN_PATH}/decode_with_drops${VPX_TEST_EXE_SUFFIX}"
+  local input_file="$1"
+  local codec="$2"
+  local output_file="${VPX_TEST_OUTPUT_DIR}/decode_with_drops_${codec}"
+  local drop_mode="$3"
+
+  [ -x "${decoder}" ] || return 1
+
+  "${decoder}" "${input_file}" "${output_file}" "${drop_mode}" > /dev/null 2>&1
+
+  [ -e "${output_file}" ] || return 1
+}
+
+# Decodes $VP8_IVF_FILE while dropping frames, twice: once in sequence mode,
+# and once in pattern mode.
+# Note: This test assumes that $VP8_IVF_FILE has exactly 29 frames, and could
+# break if the file is modified.
+decode_with_drops_vp8() {
+  if [ "$(vp8_decode_available)" = "yes" ]; then
+    # Test sequence mode: Drop frames 2-28.
+    decode_with_drops "${VP8_IVF_FILE}" "vp8" "2-28"
+
+    # Test pattern mode: Drop 3 of every 4 frames.
+    decode_with_drops "${VP8_IVF_FILE}" "vp8" "3/4"
+  fi
+}
+
+# Decodes $VP9_IVF_FILE while dropping frames, twice: once in sequence mode,
+# and once in pattern mode.
+# Note: This test assumes that $VP9_IVF_FILE has exactly 20 frames, and could
+# break if the file is modified.
+decode_with_drops_vp9() {
+  if [ "$(vp9_decode_available)" = "yes" ]; then
+    # Test sequence mode: Drop frames 2-28.
+    decode_with_drops "${VP9_IVF_FILE}" "vp9" "2-19"
+
+    # Test pattern mode: Drop 3 of every 4 frames.
+    decode_with_drops "${VP9_IVF_FILE}" "vp9" "3/4"
+  fi
+}
+
+decode_with_drops_tests="decode_with_drops_vp8
+                         decode_with_drops_vp9"
+
+run_tests decode_with_drops_verify_environment "${decode_with_drops_tests}"