Move audio frame memory handling inside AudioMixer.

webrtc/modules/audio_mixer/audio_mixer_impl_unittest.cc

 /*
  *  Copyright (c) 2016 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.
  */
 
@@ skipping 35 matching lines @@
 }
 
 AudioFrame frame_for_mixing;
 
 }  // namespace
 
 class MockMixerAudioSource : public AudioMixer::Source {
  public:
   MockMixerAudioSource()
       : fake_audio_frame_info_(AudioMixer::Source::AudioFrameInfo::kNormal) {
-    ON_CALL(*this, GetAudioFrameWithInfo(_))
+    ON_CALL(*this, GetAudioFrameWithInfo(_, _))
         .WillByDefault(
             Invoke(this, &MockMixerAudioSource::FakeAudioFrameWithInfo));
   }
 
-  MOCK_METHOD1(GetAudioFrameWithInfo, AudioFrameWithInfo(int sample_rate_hz));
+  MOCK_METHOD2(GetAudioFrameWithInfo,
+               AudioFrameInfo(int sample_rate_hz, AudioFrame* audio_frame));
 
   MOCK_METHOD0(Ssrc, int());
 
   AudioFrame* fake_frame() { return &fake_frame_; }
   AudioFrameInfo fake_info() { return fake_audio_frame_info_; }
   void set_fake_info(const AudioFrameInfo audio_frame_info) {
     fake_audio_frame_info_ = audio_frame_info;
   }
 
  private:
-  AudioFrame fake_frame_, fake_output_frame_;
+  AudioFrame fake_frame_;
   AudioFrameInfo fake_audio_frame_info_;
-  AudioFrameWithInfo FakeAudioFrameWithInfo(int sample_rate_hz) {
-    fake_output_frame_.CopyFrom(fake_frame_);
-    return {
-        &fake_output_frame_,  // audio_frame_pointer
-        fake_info(),          // audio_frame_info
-    };
+  AudioFrameInfo FakeAudioFrameWithInfo(int sample_rate_hz,
+                                        AudioFrame* audio_frame) {
+    audio_frame->CopyFrom(fake_frame_);
+    return fake_info();
   }
 };
 
 // Creates participants from |frames| and |frame_info| and adds them
 // to the mixer. Compares mixed status with |expected_status|
 void MixAndCompare(
     const std::vector<AudioFrame>& frames,
     const std::vector<AudioMixer::Source::AudioFrameInfo>& frame_info,
     const std::vector<bool>& expected_status) {
   int num_audio_sources = frames.size();
   RTC_DCHECK(frames.size() == frame_info.size());
   RTC_DCHECK(frame_info.size() == expected_status.size());
 
   const auto mixer = AudioMixerImpl::Create();
   std::vector<MockMixerAudioSource> participants(num_audio_sources);
 
   for (int i = 0; i < num_audio_sources; i++) {
     participants[i].fake_frame()->CopyFrom(frames[i]);
     participants[i].set_fake_info(frame_info[i]);
   }
 
   for (int i = 0; i < num_audio_sources; i++) {
     EXPECT_TRUE(mixer->AddSource(&participants[i]));
-    EXPECT_CALL(participants[i], GetAudioFrameWithInfo(kDefaultSampleRateHz))
+    EXPECT_CALL(participants[i], GetAudioFrameWithInfo(kDefaultSampleRateHz, _))
         .Times(Exactly(1));
   }
 
   mixer->Mix(kDefaultSampleRateHz, 1, &frame_for_mixing);
 
   for (int i = 0; i < num_audio_sources; i++) {
     EXPECT_EQ(expected_status[i],
               mixer->GetAudioSourceMixabilityStatusForTest(&participants[i]))
         << "Mixed status of AudioSource #" << i << " wrong.";
   }
 }
 
 TEST(AudioMixer, LargestEnergyVadActiveMixed) {
   constexpr int kAudioSources =
       AudioMixerImpl::kMaximumAmountOfMixedAudioSources + 3;
 
   const auto mixer = AudioMixerImpl::Create();
 
   MockMixerAudioSource participants[kAudioSources];
 
   for (int i = 0; i < kAudioSources; ++i) {
     ResetFrame(participants[i].fake_frame());
 
     // We set the 80-th sample value since the first 80 samples may be
     // modified by a ramped-in window.
     participants[i].fake_frame()->data_[80] = i;
 
     EXPECT_TRUE(mixer->AddSource(&participants[i]));
-    EXPECT_CALL(participants[i], GetAudioFrameWithInfo(_)).Times(Exactly(1));
+    EXPECT_CALL(participants[i], GetAudioFrameWithInfo(_, _)).Times(Exactly(1));
   }
 
   // Last participant gives audio frame with passive VAD, although it has the
   // largest energy.
   participants[kAudioSources - 1].fake_frame()->vad_activity_ =
       AudioFrame::kVadPassive;
 
   AudioFrame audio_frame;
   mixer->Mix(kDefaultSampleRateHz,
              1,  // number of channels
@@ skipping 21 matching lines @@
 
   ResetFrame(participant.fake_frame());
   const int n_samples = participant.fake_frame()->samples_per_channel_;
 
   // Modify the frame so that it's not zero.
   for (int j = 0; j < n_samples; j++) {
     participant.fake_frame()->data_[j] = j;
   }
 
   EXPECT_TRUE(mixer->AddSource(&participant));
-  EXPECT_CALL(participant, GetAudioFrameWithInfo(_)).Times(Exactly(2));
+  EXPECT_CALL(participant, GetAudioFrameWithInfo(_, _)).Times(Exactly(2));
 
   AudioFrame audio_frame;
   // Two mix iteration to compare after the ramp-up step.
   for (int i = 0; i < 2; i++) {
     mixer->Mix(kDefaultSampleRateHz,
                1,  // number of channels
                &audio_frame);
   }
 
   EXPECT_EQ(
       0, memcmp(participant.fake_frame()->data_, audio_frame.data_, n_samples));
 }
 
 TEST(AudioMixer, ParticipantSampleRate) {
   const auto mixer = AudioMixerImpl::Create();
 
   MockMixerAudioSource participant;
   ResetFrame(participant.fake_frame());
 
   EXPECT_TRUE(mixer->AddSource(&participant));
   for (auto frequency : {8000, 16000, 32000, 48000}) {
-    EXPECT_CALL(participant, GetAudioFrameWithInfo(frequency))
+    EXPECT_CALL(participant, GetAudioFrameWithInfo(frequency, _))
         .Times(Exactly(1));
     participant.fake_frame()->sample_rate_hz_ = frequency;
     participant.fake_frame()->samples_per_channel_ = frequency / 100;
     mixer->Mix(frequency, 1, &frame_for_mixing);
     EXPECT_EQ(frequency, frame_for_mixing.sample_rate_hz_);
   }
 }
 
 TEST(AudioMixer, ParticipantNumberOfChannels) {
   const auto mixer = AudioMixerImpl::Create();
 
   MockMixerAudioSource participant;
   ResetFrame(participant.fake_frame());
 
   EXPECT_TRUE(mixer->AddSource(&participant));
   for (size_t number_of_channels : {1, 2}) {
-    EXPECT_CALL(participant, GetAudioFrameWithInfo(kDefaultSampleRateHz))
+    EXPECT_CALL(participant, GetAudioFrameWithInfo(kDefaultSampleRateHz, _))
         .Times(Exactly(1));
     mixer->Mix(kDefaultSampleRateHz, number_of_channels, &frame_for_mixing);
     EXPECT_EQ(number_of_channels, frame_for_mixing.num_channels_);
   }
 }
 
 // Maximal amount of participants are mixed one iteration, then
 // another participant with higher energy is added.
 TEST(AudioMixer, RampedOutSourcesShouldNotBeMarkedMixed) {
   constexpr int kAudioSources =
       AudioMixerImpl::kMaximumAmountOfMixedAudioSources + 1;
 
   const auto mixer = AudioMixerImpl::Create();
   MockMixerAudioSource participants[kAudioSources];
 
   for (int i = 0; i < kAudioSources; i++) {
     ResetFrame(participants[i].fake_frame());
     // Set the participant audio energy to increase with the index
     // |i|.
     participants[i].fake_frame()->data_[0] = 100 * i;
   }
 
   // Add all participants but the loudest for mixing.
   for (int i = 0; i < kAudioSources - 1; i++) {
     EXPECT_TRUE(mixer->AddSource(&participants[i]));
-    EXPECT_CALL(participants[i], GetAudioFrameWithInfo(kDefaultSampleRateHz))
+    EXPECT_CALL(participants[i], GetAudioFrameWithInfo(kDefaultSampleRateHz, _))
         .Times(Exactly(1));
   }
 
   // First mixer iteration
   mixer->Mix(kDefaultSampleRateHz, 1, &frame_for_mixing);
 
   // All participants but the loudest should have been mixed.
   for (int i = 0; i < kAudioSources - 1; i++) {
     EXPECT_TRUE(mixer->GetAudioSourceMixabilityStatusForTest(&participants[i]))
         << "Mixed status of AudioSource #" << i << " wrong.";
   }
 
   // Add new participant with higher energy.
   EXPECT_TRUE(mixer->AddSource(&participants[kAudioSources - 1]));
   for (int i = 0; i < kAudioSources; i++) {
-    EXPECT_CALL(participants[i], GetAudioFrameWithInfo(kDefaultSampleRateHz))
+    EXPECT_CALL(participants[i], GetAudioFrameWithInfo(kDefaultSampleRateHz, _))
         .Times(Exactly(1));
   }
 
   mixer->Mix(kDefaultSampleRateHz, 1, &frame_for_mixing);
 
   // The most quiet participant should not have been mixed.
   EXPECT_FALSE(mixer->GetAudioSourceMixabilityStatusForTest(&participants[0]))
       << "Mixed status of AudioSource #0 wrong.";
 
   // The loudest participants should have been mixed.
@@ skipping 14 matching lines @@
       RTC_FROM_HERE, &AudioMixerImpl::Create);
   MockMixerAudioSource participant;
 
   ResetFrame(participant.fake_frame());
 
   participant_thread->Start();
   EXPECT_TRUE(participant_thread->Invoke<int>(
       RTC_FROM_HERE,
       rtc::Bind(&AudioMixer::AddSource, mixer.get(), &participant)));
 
-  EXPECT_CALL(participant, GetAudioFrameWithInfo(kDefaultSampleRateHz))
+  EXPECT_CALL(participant, GetAudioFrameWithInfo(kDefaultSampleRateHz, _))
       .Times(Exactly(1));
 
   // Do one mixer iteration
   mixer->Mix(kDefaultSampleRateHz, 1, &frame_for_mixing);
 }
 
 TEST(AudioMixer, MutedShouldMixAfterUnmuted) {
   constexpr int kAudioSources =
       AudioMixerImpl::kMaximumAmountOfMixedAudioSources + 1;
 
@@ skipping 62 matching lines @@
       kAudioSources, AudioMixer::Source::AudioFrameInfo::kNormal);
   frame_info[0] = AudioMixer::Source::AudioFrameInfo::kMuted;
   std::fill(frames[0].data_, frames[0].data_ + kDefaultSampleRateHz / 100,
             std::numeric_limits<int16_t>::max());
   std::vector<bool> expected_status(kAudioSources, true);
   expected_status[0] = false;
 
   MixAndCompare(frames, frame_info, expected_status);
 }
 }  // namespace webrtc