Use MIDIMessageQueue/IsValidWebMIDIData for MIDI byte stream validation

content/browser/renderer_host/media/midi_host_unittest.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/renderer_host/media/midi_host.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace {
+
+const uint8 kGMOn[] = { 0xf0, 0x7e, 0x7f, 0x09, 0x01, 0xf7 };
+const uint8 kGSOn[] = {
+  0xf0, 0x41, 0x10, 0x42, 0x12, 0x40, 0x00, 0x7f, 0x00, 0x41, 0xf7,
+};
+const uint8 kNoteOn[] = { 0x90, 0x3c, 0x7f };
+const uint8 kNoteOnWithRunningStatus[] = {
+  0x90, 0x3c, 0x7f, 0x3c, 0x7f, 0x3c, 0x7f,
+};
+const uint8 kChannelPressure[] = { 0xd0, 0x01 };
+const uint8 kChannelPressureWithRunningStatus[] = {
+  0xd0, 0x01, 0x01, 0x01,
+};
+const uint8 kTimingClock[] = { 0xf8 };
+const uint8 kBrokenData1[] = { 0x90 };
+const uint8 kBrokenData2[] = { 0xf7 };
+const uint8 kBrokenData3[] = { 0xf2, 0x00 };
+const uint8 kDataByte0[] = { 0x00 };
+
+template <typename T, size_t N>
+const std::vector<T> AsVector(const T(&data)[N]) {
+  std::vector<T> buffer;
+  buffer.insert(buffer.end(), data, data + N);
+  return buffer;
+}
+
+template <typename T, size_t N>
+void PushToVector(const T(&data)[N], std::vector<T>* buffer) {
+  buffer->insert(buffer->end(), data, data + N);
+}
+
+}  // namespace
+
+TEST(MIDIHostTest, IsValidWebMIDIData) {
+  // Test single event scenario
+  EXPECT_TRUE(MIDIHost::IsValidWebMIDIData(AsVector(kGMOn)));
+  EXPECT_TRUE(MIDIHost::IsValidWebMIDIData(AsVector(kGSOn)));
+  EXPECT_TRUE(MIDIHost::IsValidWebMIDIData(AsVector(kNoteOn)));
+  EXPECT_TRUE(MIDIHost::IsValidWebMIDIData(AsVector(kChannelPressure)));
+  EXPECT_TRUE(MIDIHost::IsValidWebMIDIData(AsVector(kTimingClock)));
+  EXPECT_FALSE(MIDIHost::IsValidWebMIDIData(AsVector(kBrokenData1)));
+  EXPECT_FALSE(MIDIHost::IsValidWebMIDIData(AsVector(kBrokenData2)));
+  EXPECT_FALSE(MIDIHost::IsValidWebMIDIData(AsVector(kBrokenData3)));
+  EXPECT_FALSE(MIDIHost::IsValidWebMIDIData(AsVector(kDataByte0)));
+
+  // MIDI running status should be disallowed
+  EXPECT_FALSE(MIDIHost::IsValidWebMIDIData(
+      AsVector(kNoteOnWithRunningStatus)));
+  EXPECT_FALSE(MIDIHost::IsValidWebMIDIData(
+      AsVector(kChannelPressureWithRunningStatus)));
+
+  // Multiple messages are allowed as long as each of them is complete.
+  {
+    std::vector<uint8> buffer;
+    PushToVector(kGMOn, &buffer);
+    PushToVector(kNoteOn, &buffer);
+    PushToVector(kGSOn, &buffer);
+    PushToVector(kTimingClock, &buffer);
+    PushToVector(kNoteOn, &buffer);
+    EXPECT_TRUE(MIDIHost::IsValidWebMIDIData(buffer));
+    PushToVector(kBrokenData1, &buffer);
+    EXPECT_FALSE(MIDIHost::IsValidWebMIDIData(buffer));
+  }
+
+  // MIDI realtime message can be placed at any position.
+  {
+    const uint8 kNoteOnWithRealTimeClock[] = {
+      0x90, 0xf8, 0x3c, 0x7f, 0x90, 0xf8, 0x3c, 0xf8, 0x7f, 0xf8,
+    };
+    EXPECT_TRUE(MIDIHost::IsValidWebMIDIData(
+        AsVector(kNoteOnWithRealTimeClock)));
+
+    const uint8 kGMOnWithRealTimeClock[] = {
+      0xf0, 0xf8, 0x7e, 0x7f, 0x09, 0x01, 0xf8, 0xf7,
+    };
+    EXPECT_TRUE(MIDIHost::IsValidWebMIDIData(AsVector(kGMOnWithRealTimeClock)));
+  }
+}
+
+}  // namespace conent