media/formats/mpeg/mpeg1_audio_stream_parser_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/base/test_data_util.h"
   6 #include "media/formats/common/stream_parser_test_base.h"
   7 #include "media/formats/mpeg/mpeg1_audio_stream_parser.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 namespace media {
  11
  12 class MPEG1AudioStreamParserTest
  13     : public StreamParserTestBase, public testing::Test {
  14  public:
  15   MPEG1AudioStreamParserTest()
  16       : StreamParserTestBase(make_scoped_ptr(new MPEG1AudioStreamParser())) {}
  17 };
  18
  19 // Test parsing with small prime sized chunks to smoke out "power of
  20 // 2" field size assumptions.
  21 TEST_F(MPEG1AudioStreamParserTest, UnalignedAppend) {
  22   const std::string expected =
  23       "NewSegment"
  24       "{ 0K }"
  25       "{ 0K }"
  26       "{ 0K }"
  27       "{ 0K }"
  28       "{ 0K }"
  29       "{ 0K }"
  30       "{ 0K }"
  31       "EndOfSegment"
  32       "NewSegment"
  33       "{ 0K }"
  34       "{ 0K }"
  35       "{ 0K }"
  36       "EndOfSegment"
  37       "NewSegment"
  38       "{ 0K }"
  39       "{ 0K }"
  40       "EndOfSegment";
  41   EXPECT_EQ(expected, ParseFile("sfx.mp3", 17));
  42   EXPECT_GT(last_audio_config().codec_delay(), 0);
  43 }
  44
  45 // Test parsing with a larger piece size to verify that multiple buffers
  46 // are passed to |new_buffer_cb_|.
  47 TEST_F(MPEG1AudioStreamParserTest, UnalignedAppend512) {
  48   const std::string expected =
  49       "NewSegment"
  50       "{ 0K 26K 52K 78K }"
  51       "EndOfSegment"
  52       "NewSegment"
  53       "{ 0K 26K 52K }"
  54       "{ 0K 26K 52K 78K }"
  55       "{ 0K }"
  56       "EndOfSegment";
  57   EXPECT_EQ(expected, ParseFile("sfx.mp3", 512));
  58   EXPECT_GT(last_audio_config().codec_delay(), 0);
  59 }
  60
  61 TEST_F(MPEG1AudioStreamParserTest, MetadataParsing) {
  62   scoped_refptr<DecoderBuffer> buffer = ReadTestDataFile("sfx.mp3");
  63   const uint8_t* buffer_ptr = buffer->data();
  64
  65   // The first 32 bytes of sfx.mp3 are an ID3 tag, so no segments should be
  66   // extracted after appending those bytes.
  67   const int kId3TagSize = 32;
  68   EXPECT_EQ("", ParseData(buffer_ptr, kId3TagSize));
  69   EXPECT_FALSE(last_audio_config().IsValidConfig());
  70   buffer_ptr += kId3TagSize;
  71
  72   // The next 417 bytes are a Xing frame; with the identifier 21 bytes into
  73   // the frame.  Appending less than 21 bytes, should result in no segments
  74   // nor an AudioDecoderConfig being created.
  75   const int kXingTagPosition = 21;
  76   EXPECT_EQ("", ParseData(buffer_ptr, kXingTagPosition));
  77   EXPECT_FALSE(last_audio_config().IsValidConfig());
  78   buffer_ptr += kXingTagPosition;
  79
  80   // Appending the rests of the Xing frame should result in no segments, but
  81   // should generate a valid AudioDecoderConfig.
  82   const int kXingRemainingSize = 417 - kXingTagPosition;
  83   EXPECT_EQ("", ParseData(buffer_ptr, kXingRemainingSize));
  84   EXPECT_TRUE(last_audio_config().IsValidConfig());
  85   buffer_ptr += kXingRemainingSize;
  86
  87   // Append the first real frame and ensure we get a segment.
  88   const int kFirstRealFrameSize = 182;
  89   EXPECT_EQ("NewSegment{ 0K }EndOfSegment",
  90             ParseData(buffer_ptr, kFirstRealFrameSize));
  91   EXPECT_TRUE(last_audio_config().IsValidConfig());
  92 }
  93
  94 }  // namespace media