Use passthrough decoder for (E)AC3 formats

media/formats/ac3/ac3_util_unittest.cc

+// Copyright 2017 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 "media/formats/ac3/ac3_util.h"
+
+#include "base/files/file_util.h"
+#include "media/base/test_data_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media {
+
+namespace {
+
+struct Ac3StreamInfo {
+  size_t size;
+  int pcm_frame_count;
+};
+
+}  // namespace anonymous
+
+TEST(Ac3UtilTest, ParseTotalAc3SampleCount) {
+  char buffer[8192];
+  const int buffer_size = sizeof(buffer);
+  const Ac3StreamInfo ac3StreamInfo[] = {
+      {834, 1 * 1536}, {1670, 2 * 1536}, {2506, 3 * 1536},
+  };
+
+  for (const Ac3StreamInfo& info : ac3StreamInfo) {
+    memset(buffer, 0, buffer_size);
+    int data_size =
+        base::ReadFile(GetTestDataFilePath("bear.ac3"), buffer, info.size);
+
+    EXPECT_EQ(info.pcm_frame_count,
+              ::media::Ac3Util::ParseTotalAc3SampleCount(
+                  reinterpret_cast<const uint8_t*>(buffer), data_size));
+  }
+}
+
+TEST(Ac3UtilTest, ParseTotalEac3SampleCount) {
+  char buffer[8192];
+  const int buffer_size = sizeof(buffer);
+  const Ac3StreamInfo ac3StreamInfo[] = {
+      {870, 1 * 1536}, {1742, 2 * 1536}, {2612, 3 * 1536},
+  };
+
+  for (const Ac3StreamInfo& info : ac3StreamInfo) {
+    memset(buffer, 0, buffer_size);
+    int data_size =
+        base::ReadFile(GetTestDataFilePath("bear.eac3"), buffer, info.size);
+
+    EXPECT_EQ(info.pcm_frame_count,
+              ::media::Ac3Util::ParseTotalEac3SampleCount(
+                  reinterpret_cast<const uint8_t*>(buffer), data_size));
+  }
+}
+
+}  // namespace media