Add mute state field to AudioFrame.

webrtc/audio/utility/audio_frame_operations_unittest.cc

 /*
  *  Copyright (c) 2012 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 14 matching lines @@
   }
 
   AudioFrame frame_;
 };
 
 void SetFrameData(int16_t ch1,
                   int16_t ch2,
                   int16_t ch3,
                   int16_t ch4,
                   AudioFrame* frame) {
+  int16_t* frame_data = frame->mutable_data();
   for (size_t i = 0; i < frame->samples_per_channel_ * 4; i += 4) {
-    frame->data_[i] = ch1;
-    frame->data_[i + 1] = ch2;
-    frame->data_[i + 2] = ch3;
-    frame->data_[i + 3] = ch4;
+    frame_data[i] = ch1;
+    frame_data[i + 1] = ch2;
+    frame_data[i + 2] = ch3;
+    frame_data[i + 3] = ch4;
   }
 }
 
 void SetFrameData(int16_t left, int16_t right, AudioFrame* frame) {
+  int16_t* frame_data = frame->mutable_data();
   for (size_t i = 0; i < frame->samples_per_channel_ * 2; i += 2) {
-    frame->data_[i] = left;
-    frame->data_[i + 1] = right;
+    frame_data[i] = left;
+    frame_data[i + 1] = right;
   }
 }
 
 void SetFrameData(int16_t data, AudioFrame* frame) {
-  for (size_t i = 0; i < frame->samples_per_channel_; i++) {
-    frame->data_[i] = data;
+  int16_t* frame_data = frame->mutable_data();
+  for (size_t i = 0;
+       i < frame->samples_per_channel_ * frame->num_channels_; i++) {
+    frame_data[i] = data;
   }
 }
 
 void VerifyFramesAreEqual(const AudioFrame& frame1, const AudioFrame& frame2) {
   EXPECT_EQ(frame1.num_channels_, frame2.num_channels_);
   EXPECT_EQ(frame1.samples_per_channel_,
             frame2.samples_per_channel_);
+  const int16_t* frame1_data = frame1.data();
+  const int16_t* frame2_data = frame2.data();
   for (size_t i = 0; i < frame1.samples_per_channel_ * frame1.num_channels_;
       i++) {
-    EXPECT_EQ(frame1.data_[i], frame2.data_[i]);
+    EXPECT_EQ(frame1_data[i], frame2_data[i]);
   }
+  EXPECT_EQ(frame1.muted(), frame2.muted());
 }
 
 void InitFrame(AudioFrame* frame, size_t channels, size_t samples_per_channel,
                int16_t left_data, int16_t right_data) {
   RTC_DCHECK(frame);
   RTC_DCHECK_GE(2, channels);
   RTC_DCHECK_GE(AudioFrame::kMaxDataSizeSamples,
                 samples_per_channel * channels);
   frame->samples_per_channel_ = samples_per_channel;
   frame->num_channels_ = channels;
   if (channels == 2) {
     SetFrameData(left_data, right_data, frame);
   } else if (channels == 1) {
     SetFrameData(left_data, frame);
   }
 }
 
 int16_t GetChannelData(const AudioFrame& frame, size_t channel, size_t index) {
   RTC_DCHECK_LT(channel, frame.num_channels_);
   RTC_DCHECK_LT(index, frame.samples_per_channel_);
-  return frame.data_[index * frame.num_channels_ + channel];
+  return frame.data()[index * frame.num_channels_ + channel];
 }
 
 void VerifyFrameDataBounds(const AudioFrame& frame, size_t channel, int16_t max,
                            int16_t min) {
   for (size_t i = 0; i < frame.samples_per_channel_; ++i) {
     int16_t s = GetChannelData(frame, channel, i);
     EXPECT_LE(min, s);
     EXPECT_GE(max, s);
   }
 }
@@ skipping 12 matching lines @@
 
   EXPECT_EQ(0, AudioFrameOperations::MonoToStereo(&frame_));
 
   AudioFrame stereo_frame;
   stereo_frame.samples_per_channel_ = 320;
   stereo_frame.num_channels_ = 2;
   SetFrameData(1, 1, &stereo_frame);
   VerifyFramesAreEqual(stereo_frame, frame_);
 }
 
+TEST_F(AudioFrameOperationsTest, MonoToStereoMuted) {
+  frame_.num_channels_ = 1;
+  ASSERT_TRUE(frame_.muted());
+  EXPECT_EQ(0, AudioFrameOperations::MonoToStereo(&frame_));
+  EXPECT_TRUE(frame_.muted());
+}
+
 TEST_F(AudioFrameOperationsTest, MonoToStereoBufferSucceeds) {
   AudioFrame target_frame;
   frame_.num_channels_ = 1;
   SetFrameData(4, &frame_);
 
   target_frame.num_channels_ = 2;
   target_frame.samples_per_channel_ = frame_.samples_per_channel_;
 
-  AudioFrameOperations::MonoToStereo(frame_.data_, frame_.samples_per_channel_,
-                                     target_frame.data_);
+  AudioFrameOperations::MonoToStereo(frame_.data(), frame_.samples_per_channel_,
+                                     target_frame.mutable_data());
 
   AudioFrame stereo_frame;
   stereo_frame.samples_per_channel_ = 320;
   stereo_frame.num_channels_ = 2;
   SetFrameData(4, 4, &stereo_frame);
   VerifyFramesAreEqual(stereo_frame, target_frame);
 }
 
 TEST_F(AudioFrameOperationsTest, StereoToMonoFailsWithBadParameters) {
   frame_.num_channels_ = 1;
   EXPECT_EQ(-1, AudioFrameOperations::StereoToMono(&frame_));
 }
 
 TEST_F(AudioFrameOperationsTest, StereoToMonoSucceeds) {
   SetFrameData(4, 2, &frame_);
   EXPECT_EQ(0, AudioFrameOperations::StereoToMono(&frame_));
 
   AudioFrame mono_frame;
   mono_frame.samples_per_channel_ = 320;
   mono_frame.num_channels_ = 1;
   SetFrameData(3, &mono_frame);
   VerifyFramesAreEqual(mono_frame, frame_);
 }
 
+TEST_F(AudioFrameOperationsTest, StereoToMonoMuted) {
+  ASSERT_TRUE(frame_.muted());
+  EXPECT_EQ(0, AudioFrameOperations::StereoToMono(&frame_));
+  EXPECT_TRUE(frame_.muted());
+}
+
 TEST_F(AudioFrameOperationsTest, StereoToMonoBufferSucceeds) {
   AudioFrame target_frame;
   SetFrameData(4, 2, &frame_);
 
   target_frame.num_channels_ = 1;
   target_frame.samples_per_channel_ = frame_.samples_per_channel_;
 
-  AudioFrameOperations::StereoToMono(frame_.data_, frame_.samples_per_channel_,
-                                     target_frame.data_);
+  AudioFrameOperations::StereoToMono(frame_.data(), frame_.samples_per_channel_,
+                                     target_frame.mutable_data());
 
   AudioFrame mono_frame;
   mono_frame.samples_per_channel_ = 320;
   mono_frame.num_channels_ = 1;
   SetFrameData(3, &mono_frame);
   VerifyFramesAreEqual(mono_frame, target_frame);
 }
 
 TEST_F(AudioFrameOperationsTest, StereoToMonoDoesNotWrapAround) {
   SetFrameData(-32768, -32768, &frame_);
@@ skipping 19 matching lines @@
 
   EXPECT_EQ(0, AudioFrameOperations::QuadToMono(&frame_));
 
   AudioFrame mono_frame;
   mono_frame.samples_per_channel_ = 320;
   mono_frame.num_channels_ = 1;
   SetFrameData(5, &mono_frame);
   VerifyFramesAreEqual(mono_frame, frame_);
 }
 
+TEST_F(AudioFrameOperationsTest, QuadToMonoMuted) {
+  frame_.num_channels_ = 4;
+  ASSERT_TRUE(frame_.muted());
+  EXPECT_EQ(0, AudioFrameOperations::QuadToMono(&frame_));
+  EXPECT_TRUE(frame_.muted());
+}
+
 TEST_F(AudioFrameOperationsTest, QuadToMonoBufferSucceeds) {
   AudioFrame target_frame;
   frame_.num_channels_ = 4;
   SetFrameData(4, 2, 6, 8, &frame_);
 
   target_frame.num_channels_ = 1;
   target_frame.samples_per_channel_ = frame_.samples_per_channel_;
 
-  AudioFrameOperations::QuadToMono(frame_.data_, frame_.samples_per_channel_,
-                                   target_frame.data_);
+  AudioFrameOperations::QuadToMono(frame_.data(), frame_.samples_per_channel_,
+                                   target_frame.mutable_data());
   AudioFrame mono_frame;
   mono_frame.samples_per_channel_ = 320;
   mono_frame.num_channels_ = 1;
   SetFrameData(5, &mono_frame);
   VerifyFramesAreEqual(mono_frame, target_frame);
 }
 
 TEST_F(AudioFrameOperationsTest, QuadToMonoDoesNotWrapAround) {
   frame_.num_channels_ = 4;
   SetFrameData(-32768, -32768, -32768, -32768, &frame_);
@@ skipping 18 matching lines @@
   SetFrameData(4, 2, 6, 8, &frame_);
   EXPECT_EQ(0, AudioFrameOperations::QuadToStereo(&frame_));
 
   AudioFrame stereo_frame;
   stereo_frame.samples_per_channel_ = 320;
   stereo_frame.num_channels_ = 2;
   SetFrameData(3, 7, &stereo_frame);
   VerifyFramesAreEqual(stereo_frame, frame_);
 }
 
+TEST_F(AudioFrameOperationsTest, QuadToStereoMuted) {
+  frame_.num_channels_ = 4;
+  ASSERT_TRUE(frame_.muted());
+  EXPECT_EQ(0, AudioFrameOperations::QuadToStereo(&frame_));
+  EXPECT_TRUE(frame_.muted());
+}
+
 TEST_F(AudioFrameOperationsTest, QuadToStereoBufferSucceeds) {
   AudioFrame target_frame;
   frame_.num_channels_ = 4;
   SetFrameData(4, 2, 6, 8, &frame_);
 
   target_frame.num_channels_ = 2;
   target_frame.samples_per_channel_ = frame_.samples_per_channel_;
 
-  AudioFrameOperations::QuadToStereo(frame_.data_, frame_.samples_per_channel_,
-                                     target_frame.data_);
+  AudioFrameOperations::QuadToStereo(frame_.data(), frame_.samples_per_channel_,
+                                     target_frame.mutable_data());
   AudioFrame stereo_frame;
   stereo_frame.samples_per_channel_ = 320;
   stereo_frame.num_channels_ = 2;
   SetFrameData(3, 7, &stereo_frame);
   VerifyFramesAreEqual(stereo_frame, target_frame);
 }
 
 TEST_F(AudioFrameOperationsTest, QuadToStereoDoesNotWrapAround) {
   frame_.num_channels_ = 4;
   SetFrameData(-32768, -32768, -32768, -32768, &frame_);
@@ skipping 11 matching lines @@
 
   AudioFrame swapped_frame;
   swapped_frame.samples_per_channel_ = 320;
   swapped_frame.num_channels_ = 2;
   SetFrameData(1, 0, &swapped_frame);
 
   AudioFrameOperations::SwapStereoChannels(&frame_);
   VerifyFramesAreEqual(swapped_frame, frame_);
 }
 
+TEST_F(AudioFrameOperationsTest, SwapStereoChannelsMuted) {
+  ASSERT_TRUE(frame_.muted());
+  AudioFrameOperations::SwapStereoChannels(&frame_);
+  EXPECT_TRUE(frame_.muted());
+}
+
 TEST_F(AudioFrameOperationsTest, SwapStereoChannelsFailsOnMono) {
   frame_.num_channels_ = 1;
   // Set data to "stereo", despite it being a mono frame.
   SetFrameData(0, 1, &frame_);
 
   AudioFrame orig_frame;
   orig_frame.CopyFrom(frame_);
   AudioFrameOperations::SwapStereoChannels(&frame_);
   // Verify that no swap occurred.
   VerifyFramesAreEqual(orig_frame, frame_);
 }
 
 TEST_F(AudioFrameOperationsTest, MuteDisabled) {
   SetFrameData(1000, -1000, &frame_);
   AudioFrameOperations::Mute(&frame_, false, false);
 
   AudioFrame muted_frame;
   muted_frame.samples_per_channel_ = 320;
   muted_frame.num_channels_ = 2;
   SetFrameData(1000, -1000, &muted_frame);
   VerifyFramesAreEqual(muted_frame, frame_);
 }
 
 TEST_F(AudioFrameOperationsTest, MuteEnabled) {
   SetFrameData(1000, -1000, &frame_);
   AudioFrameOperations::Mute(&frame_, true, true);
 
   AudioFrame muted_frame;
-  muted_frame.samples_per_channel_ = 320;
-  muted_frame.num_channels_ = 2;
-  SetFrameData(0, 0, &muted_frame);
+  muted_frame.samples_per_channel_ = frame_.samples_per_channel_;
+  muted_frame.num_channels_ = frame_.num_channels_;
+  ASSERT_TRUE(muted_frame.muted());
   VerifyFramesAreEqual(muted_frame, frame_);
 }
 
 // Verify that *beginning* to mute works for short and long (>128) frames, mono
 // and stereo. Beginning mute should yield a ramp down to zero.
 TEST_F(AudioFrameOperationsTest, MuteBeginMonoLong) {
   InitFrame(&frame_, 1, 228, 1000, -1000);
   AudioFrameOperations::Mute(&frame_, false, true);
   VerifyFrameDataBounds(frame_, 0, 1000, 0);
   EXPECT_EQ(1000, GetChannelData(frame_, 0, 99));
@@ skipping 87 matching lines @@
   EXPECT_EQ(10, GetChannelData(frame_, 0, 0));
   EXPECT_EQ(-10, GetChannelData(frame_, 1, 0));
   EXPECT_EQ(21, GetChannelData(frame_, 0, 1));
   EXPECT_EQ(-21, GetChannelData(frame_, 1, 1));
   EXPECT_EQ(989, GetChannelData(frame_, 0, 91));
   EXPECT_EQ(-989, GetChannelData(frame_, 1, 91));
   EXPECT_EQ(999, GetChannelData(frame_, 0, 92));
   EXPECT_EQ(-999, GetChannelData(frame_, 1, 92));
 }
 
+TEST_F(AudioFrameOperationsTest, MuteBeginAlreadyMuted) {
+  ASSERT_TRUE(frame_.muted());
+  AudioFrameOperations::Mute(&frame_, false, true);
+  EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, MuteEndAlreadyMuted) {
+  ASSERT_TRUE(frame_.muted());
+  AudioFrameOperations::Mute(&frame_, true, false);
+  EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, ApplyHalfGainSucceeds) {
+  SetFrameData(2, &frame_);
+
+  AudioFrame half_gain_frame;
+  half_gain_frame.num_channels_ = frame_.num_channels_;
+  half_gain_frame.samples_per_channel_ = frame_.samples_per_channel_;
+  SetFrameData(1, &half_gain_frame);
+
+  AudioFrameOperations::ApplyHalfGain(&frame_);
+  VerifyFramesAreEqual(half_gain_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, ApplyHalfGainMuted) {
+  ASSERT_TRUE(frame_.muted());
+  AudioFrameOperations::ApplyHalfGain(&frame_);
+  EXPECT_TRUE(frame_.muted());
+}
+
 // TODO(andrew): should not allow negative scales.
 TEST_F(AudioFrameOperationsTest, DISABLED_ScaleFailsWithBadParameters) {
   frame_.num_channels_ = 1;
   EXPECT_EQ(-1, AudioFrameOperations::Scale(1.0, 1.0, &frame_));
 
   frame_.num_channels_ = 3;
   EXPECT_EQ(-1, AudioFrameOperations::Scale(1.0, 1.0, &frame_));
 
   frame_.num_channels_ = 2;
   EXPECT_EQ(-1, AudioFrameOperations::Scale(-1.0, 1.0, &frame_));
@@ skipping 16 matching lines @@
   SetFrameData(1, -1, &frame_);
   EXPECT_EQ(0, AudioFrameOperations::Scale(2.0, 3.0, &frame_));
 
   AudioFrame scaled_frame;
   scaled_frame.samples_per_channel_ = 320;
   scaled_frame.num_channels_ = 2;
   SetFrameData(2, -3, &scaled_frame);
   VerifyFramesAreEqual(scaled_frame, frame_);
 }
 
+TEST_F(AudioFrameOperationsTest, ScaleMuted) {
+  ASSERT_TRUE(frame_.muted());
+  EXPECT_EQ(0, AudioFrameOperations::Scale(2.0, 3.0, &frame_));
+  EXPECT_TRUE(frame_.muted());
+}
+
 // TODO(andrew): should fail with a negative scale.
 TEST_F(AudioFrameOperationsTest, DISABLED_ScaleWithSatFailsWithBadParameters) {
   EXPECT_EQ(-1, AudioFrameOperations::ScaleWithSat(-1.0, &frame_));
 }
 
 TEST_F(AudioFrameOperationsTest, ScaleWithSatDoesNotWrapAround) {
   frame_.num_channels_ = 1;
   SetFrameData(4000, &frame_);
   EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(10.0, &frame_));
 
@@ skipping 14 matching lines @@
   SetFrameData(1, &frame_);
   EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(2.0, &frame_));
 
   AudioFrame scaled_frame;
   scaled_frame.samples_per_channel_ = 320;
   scaled_frame.num_channels_ = 1;
   SetFrameData(2, &scaled_frame);
   VerifyFramesAreEqual(scaled_frame, frame_);
 }
 
+TEST_F(AudioFrameOperationsTest, ScaleWithSatMuted) {
+  ASSERT_TRUE(frame_.muted());
+  EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(2.0, &frame_));
+  EXPECT_TRUE(frame_.muted());
+}
+
 TEST_F(AudioFrameOperationsTest, AddingXToEmptyGivesX) {
   // When samples_per_channel_ is 0, the frame counts as empty and zero.
   AudioFrame frame_to_add_to;
+  frame_to_add_to.mutable_data();  // Unmute the frame.
+  ASSERT_FALSE(frame_to_add_to.muted());
   frame_to_add_to.samples_per_channel_ = 0;
   frame_to_add_to.num_channels_ = frame_.num_channels_;
 
+  SetFrameData(1000, &frame_);
   AudioFrameOperations::Add(frame_, &frame_to_add_to);
   VerifyFramesAreEqual(frame_, frame_to_add_to);
 }
 
+TEST_F(AudioFrameOperationsTest, AddingXToMutedGivesX) {
+  AudioFrame frame_to_add_to;
+  ASSERT_TRUE(frame_to_add_to.muted());
+  frame_to_add_to.samples_per_channel_ = frame_.samples_per_channel_;
+  frame_to_add_to.num_channels_ = frame_.num_channels_;
+
+  SetFrameData(1000, &frame_);
+  AudioFrameOperations::Add(frame_, &frame_to_add_to);
+  VerifyFramesAreEqual(frame_, frame_to_add_to);
+}
+
+TEST_F(AudioFrameOperationsTest, AddingMutedToXGivesX) {
+  AudioFrame frame_to_add_to;
+  frame_to_add_to.samples_per_channel_ = frame_.samples_per_channel_;
+  frame_to_add_to.num_channels_ = frame_.num_channels_;
+  SetFrameData(1000, &frame_to_add_to);
+
+  AudioFrame frame_copy;
+  frame_copy.CopyFrom(frame_to_add_to);
+
+  ASSERT_TRUE(frame_.muted());
+  AudioFrameOperations::Add(frame_, &frame_to_add_to);
+  VerifyFramesAreEqual(frame_copy, frame_to_add_to);
+}
+
 TEST_F(AudioFrameOperationsTest, AddingTwoFramesProducesTheirSum) {
   AudioFrame frame_to_add_to;
   frame_to_add_to.samples_per_channel_ = frame_.samples_per_channel_;
   frame_to_add_to.num_channels_ = frame_.num_channels_;
   SetFrameData(1000, &frame_to_add_to);
+  SetFrameData(2000, &frame_);
 
   AudioFrameOperations::Add(frame_, &frame_to_add_to);
-  SetFrameData(frame_.data_[0] + 1000, &frame_);
+  SetFrameData(frame_.data()[0] + 1000, &frame_);
   VerifyFramesAreEqual(frame_, frame_to_add_to);
 }
+
 }  // namespace
 }  // namespace webrtc