Add unit test for MediaFile WAV file writing

R=aluebs@webrtc.org, andrew@webrtc.org, minyue@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/16029004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@6713 4adac7df-926f-26a2-2b94-8c16560cd09d

1 files changed, 48 insertions, 0 deletions

diff --git a/modules/media_file/source/media_file_unittest.cc b/modules/media_file/source/media_file_unittest.cc
index d658dc2c..56d3544c 100644
--- a/modules/media_file/source/media_file_unittest.cc
+++ b/modules/media_file/source/media_file_unittest.cc
@@ -10,6 +10,7 @@
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/modules/media_file/interface/media_file.h"
+#include "webrtc/system_wrappers/interface/compile_assert.h"
 #include "webrtc/system_wrappers/interface/sleep.h"
 #include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/test/testsupport/gtest_disable.h"
@@ -45,3 +46,50 @@ TEST_F(MediaFileTest, DISABLED_ON_ANDROID(StartPlayingAudioFileWithoutError)) {
 
   ASSERT_EQ(0, media_file_->StopPlaying());
 }
+
+TEST_F(MediaFileTest, WriteWavFile) {
+  // Write file.
+  static const int kHeaderSize = 44;
+  static const int kPayloadSize = 320;
+  webrtc::CodecInst codec = {0, "L16", 16000, kPayloadSize, 1};
+  std::string outfile = webrtc::test::OutputPath() + "wavtest.wav";
+  ASSERT_EQ(0,
+            media_file_->StartRecordingAudioFile(
+                outfile.c_str(), webrtc::kFileFormatWavFile, codec));
+  static const int8_t kFakeData[kPayloadSize] = {0};
+  ASSERT_EQ(0, media_file_->IncomingAudioData(kFakeData, kPayloadSize));
+  ASSERT_EQ(0, media_file_->StopRecording());
+
+  // Check the file we just wrote.
+  static const uint8_t kExpectedHeader[] = {
+    'R', 'I', 'F', 'F',
+    0x64, 0x1, 0, 0,  // size of whole file - 8: 320 + 44 - 8
+    'W', 'A', 'V', 'E',
+    'f', 'm', 't', ' ',
+    0x10, 0, 0, 0,  // size of fmt block - 8: 24 - 8
+    0x1, 0,  // format: PCM (1)
+    0x1, 0,  // channels: 1
+    0x80, 0x3e, 0, 0,  // sample rate: 16000
+    0, 0x7d, 0, 0,  // byte rate: 2 * 16000
+    0x2, 0,  // block align: NumChannels * BytesPerSample
+    0x10, 0,  // bits per sample: 2 * 8
+    'd', 'a', 't', 'a',
+    0x40, 0x1, 0, 0,  // size of payload: 320
+  };
+  COMPILE_ASSERT(sizeof(kExpectedHeader) == kHeaderSize, header_size);
+
+  EXPECT_EQ(size_t(kHeaderSize + kPayloadSize),
+            webrtc::test::GetFileSize(outfile));
+  FILE* f = fopen(outfile.c_str(), "rb");
+  ASSERT_TRUE(f);
+
+  uint8_t header[kHeaderSize];
+  ASSERT_EQ(1u, fread(header, kHeaderSize, 1, f));
+  EXPECT_EQ(0, memcmp(kExpectedHeader, header, kHeaderSize));
+
+  uint8_t payload[kPayloadSize];
+  ASSERT_EQ(1u, fread(payload, kPayloadSize, 1, f));
+  EXPECT_EQ(0, memcmp(kFakeData, payload, kPayloadSize));
+
+  EXPECT_EQ(0, fclose(f));
+}