Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}

modules/audio_coding/acm2/rent_a_codec_unittest.cc

@@ -0,0 +1,232 @@
+/*
+ *  Copyright (c) 2015 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 <memory>
+
+#include "webrtc/modules/audio_coding/acm2/rent_a_codec.h"
+#include "webrtc/rtc_base/arraysize.h"
+#include "webrtc/test/gtest.h"
+#include "webrtc/test/mock_audio_encoder.h"
+
+namespace webrtc {
+namespace acm2 {
+
+using ::testing::Return;
+
+namespace {
+
+const int kDataLengthSamples = 80;
+const int kPacketSizeSamples = 2 * kDataLengthSamples;
+const int16_t kZeroData[kDataLengthSamples] = {0};
+const CodecInst kDefaultCodecInst = {0, "pcmu", 8000, kPacketSizeSamples,
+                                     1, 64000};
+const int kCngPt = 13;
+
+class Marker final {
+ public:
+  MOCK_METHOD1(Mark, void(std::string desc));
+};
+
+}  // namespace
+
+class RentACodecTestF : public ::testing::Test {
+ protected:
+  void CreateCodec() {
+    auto speech_encoder = rent_a_codec_.RentEncoder(kDefaultCodecInst);
+    ASSERT_TRUE(speech_encoder);
+    RentACodec::StackParameters param;
+    param.use_cng = true;
+    param.speech_encoder = std::move(speech_encoder);
+    encoder_ = rent_a_codec_.RentEncoderStack(&param);
+  }
+
+  void EncodeAndVerify(size_t expected_out_length,
+                       uint32_t expected_timestamp,
+                       int expected_payload_type,
+                       int expected_send_even_if_empty) {
+    rtc::Buffer out;
+    AudioEncoder::EncodedInfo encoded_info;
+    encoded_info =
+        encoder_->Encode(timestamp_, kZeroData, &out);
+    timestamp_ += kDataLengthSamples;
+    EXPECT_TRUE(encoded_info.redundant.empty());
+    EXPECT_EQ(expected_out_length, encoded_info.encoded_bytes);
+    EXPECT_EQ(expected_timestamp, encoded_info.encoded_timestamp);
+    if (expected_payload_type >= 0)
+      EXPECT_EQ(expected_payload_type, encoded_info.payload_type);
+    if (expected_send_even_if_empty >= 0)
+      EXPECT_EQ(static_cast<bool>(expected_send_even_if_empty),
+                encoded_info.send_even_if_empty);
+  }
+
+  RentACodec rent_a_codec_;
+  std::unique_ptr<AudioEncoder> encoder_;
+  uint32_t timestamp_ = 0;
+};
+
+// This test verifies that CNG frames are delivered as expected. Since the frame
+// size is set to 20 ms, we expect the first encode call to produce no output
+// (which is signaled as 0 bytes output of type kNoEncoding). The next encode
+// call should produce one SID frame of 9 bytes. The third call should not
+// result in any output (just like the first one). The fourth and final encode
+// call should produce an "empty frame", which is like no output, but with
+// AudioEncoder::EncodedInfo::send_even_if_empty set to true. (The reason to
+// produce an empty frame is to drive sending of DTMF packets in the RTP/RTCP
+// module.)
+TEST_F(RentACodecTestF, VerifyCngFrames) {
+  CreateCodec();
+  uint32_t expected_timestamp = timestamp_;
+  // Verify no frame.
+  {
+    SCOPED_TRACE("First encoding");
+    EncodeAndVerify(0, expected_timestamp, -1, -1);
+  }
+
+  // Verify SID frame delivered.
+  {
+    SCOPED_TRACE("Second encoding");
+    EncodeAndVerify(9, expected_timestamp, kCngPt, 1);
+  }
+
+  // Verify no frame.
+  {
+    SCOPED_TRACE("Third encoding");
+    EncodeAndVerify(0, expected_timestamp, -1, -1);
+  }
+
+  // Verify NoEncoding.
+  expected_timestamp += 2 * kDataLengthSamples;
+  {
+    SCOPED_TRACE("Fourth encoding");
+    EncodeAndVerify(0, expected_timestamp, kCngPt, 1);
+  }
+}
+
+TEST(RentACodecTest, ExternalEncoder) {
+  const int kSampleRateHz = 8000;
+  auto* external_encoder = new MockAudioEncoder;
+  EXPECT_CALL(*external_encoder, SampleRateHz())
+      .WillRepeatedly(Return(kSampleRateHz));
+  EXPECT_CALL(*external_encoder, NumChannels()).WillRepeatedly(Return(1));
+  EXPECT_CALL(*external_encoder, SetFec(false)).WillRepeatedly(Return(true));
+
+  RentACodec rac;
+  RentACodec::StackParameters param;
+  param.speech_encoder = std::unique_ptr<AudioEncoder>(external_encoder);
+  std::unique_ptr<AudioEncoder> encoder_stack = rac.RentEncoderStack(&param);
+  EXPECT_EQ(external_encoder, encoder_stack.get());
+  const int kPacketSizeSamples = kSampleRateHz / 100;
+  int16_t audio[kPacketSizeSamples] = {0};
+  rtc::Buffer encoded;
+  AudioEncoder::EncodedInfo info;
+
+  Marker marker;
+  {
+    ::testing::InSequence s;
+    info.encoded_timestamp = 0;
+    EXPECT_CALL(
+        *external_encoder,
+        EncodeImpl(0, rtc::ArrayView<const int16_t>(audio), &encoded))
+        .WillOnce(Return(info));
+    EXPECT_CALL(marker, Mark("A"));
+    EXPECT_CALL(marker, Mark("B"));
+    EXPECT_CALL(*external_encoder, Die());
+    EXPECT_CALL(marker, Mark("C"));
+  }
+
+  info = encoder_stack->Encode(0, audio, &encoded);
+  EXPECT_EQ(0u, info.encoded_timestamp);
+  marker.Mark("A");
+
+  // Change to internal encoder.
+  CodecInst codec_inst = kDefaultCodecInst;
+  codec_inst.pacsize = kPacketSizeSamples;
+  param.speech_encoder = rac.RentEncoder(codec_inst);
+  ASSERT_TRUE(param.speech_encoder);
+  AudioEncoder* enc = param.speech_encoder.get();
+  std::unique_ptr<AudioEncoder> stack = rac.RentEncoderStack(&param);
+  EXPECT_EQ(enc, stack.get());
+
+  // Don't expect any more calls to the external encoder.
+  info = stack->Encode(1, audio, &encoded);
+  marker.Mark("B");
+  encoder_stack.reset();
+  marker.Mark("C");
+}
+
+// Verify that the speech encoder's Reset method is called when CNG or RED
+// (or both) are switched on, but not when they're switched off.
+void TestCngAndRedResetSpeechEncoder(bool use_cng, bool use_red) {
+  auto make_enc = [] {
+    auto speech_encoder =
+        std::unique_ptr<MockAudioEncoder>(new MockAudioEncoder);
+    EXPECT_CALL(*speech_encoder, NumChannels()).WillRepeatedly(Return(1));
+    EXPECT_CALL(*speech_encoder, Max10MsFramesInAPacket())
+        .WillRepeatedly(Return(2));
+    EXPECT_CALL(*speech_encoder, SampleRateHz()).WillRepeatedly(Return(8000));
+    EXPECT_CALL(*speech_encoder, SetFec(false)).WillRepeatedly(Return(true));
+    return speech_encoder;
+  };
+  auto speech_encoder1 = make_enc();
+  auto speech_encoder2 = make_enc();
+  Marker marker;
+  {
+    ::testing::InSequence s;
+    EXPECT_CALL(marker, Mark("disabled"));
+    EXPECT_CALL(*speech_encoder1, Die());
+    EXPECT_CALL(marker, Mark("enabled"));
+    if (use_cng || use_red)
+      EXPECT_CALL(*speech_encoder2, Reset());
+    EXPECT_CALL(*speech_encoder2, Die());
+  }
+
+  RentACodec::StackParameters param1, param2;
+  param1.speech_encoder = std::move(speech_encoder1);
+  param2.speech_encoder = std::move(speech_encoder2);
+  param2.use_cng = use_cng;
+  param2.use_red = use_red;
+  marker.Mark("disabled");
+  RentACodec rac;
+  rac.RentEncoderStack(&param1);
+  marker.Mark("enabled");
+  rac.RentEncoderStack(&param2);
+}
+
+TEST(RentACodecTest, CngResetsSpeechEncoder) {
+  TestCngAndRedResetSpeechEncoder(true, false);
+}
+
+TEST(RentACodecTest, RedResetsSpeechEncoder) {
+  TestCngAndRedResetSpeechEncoder(false, true);
+}
+
+TEST(RentACodecTest, CngAndRedResetsSpeechEncoder) {
+  TestCngAndRedResetSpeechEncoder(true, true);
+}
+
+TEST(RentACodecTest, NoCngAndRedNoSpeechEncoderReset) {
+  TestCngAndRedResetSpeechEncoder(false, false);
+}
+
+TEST(RentACodecTest, RentEncoderError) {
+  const CodecInst codec_inst = {
+      0, "Robert'); DROP TABLE Students;", 8000, 160, 1, 64000};
+  RentACodec rent_a_codec;
+  EXPECT_FALSE(rent_a_codec.RentEncoder(codec_inst));
+}
+
+TEST(RentACodecTest, RentEncoderStackWithoutSpeechEncoder) {
+  RentACodec::StackParameters sp;
+  EXPECT_EQ(nullptr, sp.speech_encoder);
+  EXPECT_EQ(nullptr, RentACodec().RentEncoderStack(&sp));
+}
+
+}  // namespace acm2
+}  // namespace webrtc