1 files changed, 146 insertions, 0 deletions
diff --git a/third_party/libwebrtc/call/adaptation/video_source_restrictions_unittest.cc b/third_party/libwebrtc/call/adaptation/video_source_restrictions_unittest.cc
new file mode 100644
index 0000000000..8c1ae4c896
--- /dev/null
+++ b/third_party/libwebrtc/call/adaptation/video_source_restrictions_unittest.cc
@@ -0,0 +1,146 @@
+/*
+ *  Copyright (c) 2020 The WebRTC 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 "call/adaptation/video_source_restrictions.h"
+
+#include "test/gtest.h"
+
+namespace webrtc {
+
+namespace {
+
+const size_t kHdPixels = 1280 * 720;
+
+const VideoSourceRestrictions kUnlimited;
+const VideoSourceRestrictions k15fps(absl::nullopt, absl::nullopt, 15.0);
+const VideoSourceRestrictions kHd(kHdPixels, kHdPixels, absl::nullopt);
+const VideoSourceRestrictions kHd15fps(kHdPixels, kHdPixels, 15.0);
+const VideoSourceRestrictions kVga7fps(kHdPixels / 2, kHdPixels / 2, 7.0);
+
+VideoSourceRestrictions RestrictionsFromMaxPixelsPerFrame(
+    size_t max_pixels_per_frame) {
+  return VideoSourceRestrictions(max_pixels_per_frame, absl::nullopt,
+                                 absl::nullopt);
+}
+
+VideoSourceRestrictions RestrictionsFromMaxFrameRate(double max_frame_rate) {
+  return VideoSourceRestrictions(absl::nullopt, absl::nullopt, max_frame_rate);
+}
+
+}  // namespace
+
+TEST(VideoSourceRestrictionsTest, DidIncreaseResolution) {
+  // smaller restrictions -> larger restrictions
+  EXPECT_TRUE(DidIncreaseResolution(RestrictionsFromMaxPixelsPerFrame(10),
+                                    RestrictionsFromMaxPixelsPerFrame(11)));
+  // unrestricted -> restricted
+  EXPECT_FALSE(DidIncreaseResolution(VideoSourceRestrictions(),
+                                     RestrictionsFromMaxPixelsPerFrame(10)));
+  // restricted -> unrestricted
+  EXPECT_TRUE(DidIncreaseResolution(RestrictionsFromMaxPixelsPerFrame(10),
+                                    VideoSourceRestrictions()));
+  // restricted -> equally restricted
+  EXPECT_FALSE(DidIncreaseResolution(RestrictionsFromMaxPixelsPerFrame(10),
+                                     RestrictionsFromMaxPixelsPerFrame(10)));
+  // unrestricted -> unrestricted
+  EXPECT_FALSE(DidIncreaseResolution(VideoSourceRestrictions(),
+                                     VideoSourceRestrictions()));
+  // larger restrictions -> smaller restrictions
+  EXPECT_FALSE(DidIncreaseResolution(RestrictionsFromMaxPixelsPerFrame(10),
+                                     RestrictionsFromMaxPixelsPerFrame(9)));
+}
+
+TEST(VideoSourceRestrictionsTest, DidDecreaseFrameRate) {
+  // samller restrictions -> larger restrictions
+  EXPECT_FALSE(DidDecreaseFrameRate(RestrictionsFromMaxFrameRate(10),
+                                    RestrictionsFromMaxFrameRate(11)));
+  // unrestricted -> restricted
+  EXPECT_TRUE(DidDecreaseFrameRate(VideoSourceRestrictions(),
+                                   RestrictionsFromMaxFrameRate(10)));
+  // restricted -> unrestricted
+  EXPECT_FALSE(DidDecreaseFrameRate(RestrictionsFromMaxFrameRate(10),
+                                    VideoSourceRestrictions()));
+  // restricted -> equally restricted
+  EXPECT_FALSE(DidDecreaseFrameRate(RestrictionsFromMaxFrameRate(10),
+                                    RestrictionsFromMaxFrameRate(10)));
+  // unrestricted -> unrestricted
+  EXPECT_FALSE(DidDecreaseFrameRate(VideoSourceRestrictions(),
+                                    VideoSourceRestrictions()));
+  // larger restrictions -> samller restrictions
+  EXPECT_TRUE(DidDecreaseFrameRate(RestrictionsFromMaxFrameRate(10),
+                                   RestrictionsFromMaxFrameRate(9)));
+}
+
+TEST(VideoSourceRestrictionsTest, DidRestrictionsChangeFalseForSame) {
+  EXPECT_FALSE(DidRestrictionsDecrease(kUnlimited, kUnlimited));
+  EXPECT_FALSE(DidRestrictionsIncrease(kUnlimited, kUnlimited));
+
+  // Both resolution and fps restricted.
+  EXPECT_FALSE(DidRestrictionsDecrease(kHd15fps, kHd15fps));
+  EXPECT_FALSE(DidRestrictionsIncrease(kHd15fps, kHd15fps));
+}
+
+TEST(VideoSourceRestrictions,
+     DidRestrictionsIncreaseTrueWhenPixelsOrFrameRateDecreased) {
+  // Unlimited > Limited resolution.
+  EXPECT_TRUE(DidRestrictionsIncrease(kUnlimited, kHd));
+  // Unlimited > limited fps.
+  EXPECT_TRUE(DidRestrictionsIncrease(kUnlimited, k15fps));
+  // Unlimited > limited resolution + limited fps.
+  EXPECT_TRUE(DidRestrictionsIncrease(kUnlimited, kHd15fps));
+  // Limited resolution > limited resolution + limited fps.
+  EXPECT_TRUE(DidRestrictionsIncrease(kHd, kHd15fps));
+  // Limited fps > limited resolution + limited fps.
+  EXPECT_TRUE(DidRestrictionsIncrease(k15fps, kHd15fps));
+  // Limited resolution + fps > More limited resolution + more limited fps
+  EXPECT_TRUE(DidRestrictionsIncrease(kHd15fps, kVga7fps));
+}
+
+TEST(VideoSourceRestrictions,
+     DidRestrictionsDecreaseTrueWhenPixelsOrFrameRateIncreased) {
+  // Limited resolution < Unlimited.
+  EXPECT_TRUE(DidRestrictionsDecrease(kHd, kUnlimited));
+  // Limited fps < Unlimited.
+  EXPECT_TRUE(DidRestrictionsDecrease(k15fps, kUnlimited));
+  // Limited resolution + limited fps < unlimited.
+  EXPECT_TRUE(DidRestrictionsDecrease(kHd15fps, kUnlimited));
+  // Limited resolution + limited fps < limited resolution.
+  EXPECT_TRUE(DidRestrictionsDecrease(kHd15fps, kHd));
+  // Limited resolution + limited fps < limited fps.
+  EXPECT_TRUE(DidRestrictionsDecrease(kHd15fps, k15fps));
+  // More limited resolution + more limited fps < limited resolution + fps
+  EXPECT_TRUE(DidRestrictionsDecrease(kVga7fps, kHd15fps));
+}
+
+TEST(VideoSourceRestrictions,
+     DidRestrictionsChangeFalseWhenFrameRateAndPixelsChangeDifferently) {
+  // One changed framerate, the other resolution; not an increase or decrease.
+  EXPECT_FALSE(DidRestrictionsIncrease(kHd, k15fps));
+  EXPECT_FALSE(DidRestrictionsDecrease(kHd, k15fps));
+}
+
+TEST(VideoSourceRestrictions, UpdateMin) {
+  VideoSourceRestrictions one(kHdPixels / 2, kHdPixels, 7.0);
+  VideoSourceRestrictions two(kHdPixels, kHdPixels / 3, 15.0);
+
+  one.UpdateMin(two);
+
+  EXPECT_EQ(one.max_pixels_per_frame(), kHdPixels / 2);
+  EXPECT_EQ(one.target_pixels_per_frame(), kHdPixels / 3);
+  EXPECT_EQ(one.max_frame_rate(), 7.0);
+
+  two.UpdateMin(one);
+
+  EXPECT_EQ(two.max_pixels_per_frame(), kHdPixels / 2);
+  EXPECT_EQ(two.target_pixels_per_frame(), kHdPixels / 3);
+  EXPECT_EQ(two.max_frame_rate(), 7.0);
+}
+
+}  // namespace webrtc