Add test/vpx_image_test.cc

Ported from test/aom_image_test.cc in libaom commit 04d6253.

Change-Id: I56478d0a5603cfb5b65e644add0918387ff69a00

test/test.mk

@@ -21,6 +21,7 @@ LIBVPX_TEST_SRCS-yes += video_source.h
 ## Black box tests only use the public API.
 ##
 LIBVPX_TEST_SRCS-yes                   += ../md5_utils.h ../md5_utils.c
+LIBVPX_TEST_SRCS-yes                   += vpx_image_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_DECODERS)    += ivf_video_source.h
 LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS)    += ../y4minput.h ../y4minput.c
 ifneq ($(CONFIG_REALTIME_ONLY),yes)

test/vpx_image_test.cc

@@ -0,0 +1,72 @@
+/*
+ *  Copyright (c) 2024 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.
+ */
+
+#include "vpx/vpx_image.h"
+#include "third_party/googletest/src/include/gtest/gtest.h"
+
+TEST(VpxImageTest, VpxImgWrapInvalidAlign) {
+  const int kWidth = 128;
+  const int kHeight = 128;
+  unsigned char buf[kWidth * kHeight * 3];
+
+  vpx_image_t img;
+  // Set img_data and img_data_owner to junk values. vpx_img_wrap() should
+  // not read these values on failure.
+  unsigned char empty[] = "";
+  img.img_data = empty;
+  img.img_data_owner = 1;
+
+  vpx_img_fmt_t format = VPX_IMG_FMT_I444;
+  // 'align' must be a power of 2 but is not. This causes the vpx_img_wrap()
+  // call to fail. The test verifies we do not read the junk values in 'img'.
+  unsigned int align = 31;
+  EXPECT_EQ(vpx_img_wrap(&img, format, kWidth, kHeight, align, buf), nullptr);
+}
+
+TEST(VpxImageTest, VpxImgSetRectOverflow) {
+  const int kWidth = 128;
+  const int kHeight = 128;
+  unsigned char buf[kWidth * kHeight * 3];
+
+  vpx_image_t img;
+  vpx_img_fmt_t format = VPX_IMG_FMT_I444;
+  unsigned int align = 32;
+  EXPECT_EQ(vpx_img_wrap(&img, format, kWidth, kHeight, align, buf), &img);
+
+  EXPECT_EQ(vpx_img_set_rect(&img, 0, 0, kWidth, kHeight), 0);
+  // This would result in overflow because -1 is cast to UINT_MAX.
+  EXPECT_NE(vpx_img_set_rect(&img, static_cast<unsigned int>(-1),
+                             static_cast<unsigned int>(-1), kWidth, kHeight),
+            0);
+}
+
+TEST(VpxImageTest, VpxImgAllocNone) {
+  const int kWidth = 128;
+  const int kHeight = 128;
+
+  vpx_image_t img;
+  vpx_img_fmt_t format = VPX_IMG_FMT_NONE;
+  unsigned int align = 32;
+  ASSERT_EQ(vpx_img_alloc(&img, format, kWidth, kHeight, align), nullptr);
+}
+
+TEST(VpxImageTest, VpxImgAllocNv12) {
+  const int kWidth = 128;
+  const int kHeight = 128;
+
+  vpx_image_t img;
+  vpx_img_fmt_t format = VPX_IMG_FMT_NV12;
+  unsigned int align = 32;
+  EXPECT_EQ(vpx_img_alloc(&img, format, kWidth, kHeight, align), &img);
+  EXPECT_EQ(img.stride[VPX_PLANE_U], img.stride[VPX_PLANE_Y]);
+  EXPECT_EQ(img.stride[VPX_PLANE_V], img.stride[VPX_PLANE_U]);
+  EXPECT_EQ(img.planes[VPX_PLANE_V], img.planes[VPX_PLANE_U] + 1);
+  vpx_img_free(&img);
+}