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Diffstat (limited to 'dom/media/gtest/TestAudioInputProcessing.cpp')
| -rw-r--r-- | dom/media/gtest/TestAudioInputProcessing.cpp | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/dom/media/gtest/TestAudioInputProcessing.cpp b/dom/media/gtest/TestAudioInputProcessing.cpp new file mode 100644 index 0000000000..1dd5723acf --- /dev/null +++ b/dom/media/gtest/TestAudioInputProcessing.cpp @@ -0,0 +1,386 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "gmock/gmock.h" +#include "gtest/gtest.h" + +#include "AudioGenerator.h" +#include "MediaEngineWebRTCAudio.h" +#include "MediaTrackGraphImpl.h" +#include "PrincipalHandle.h" +#include "mozilla/Attributes.h" +#include "mozilla/NullPrincipal.h" +#include "mozilla/UniquePtr.h" +#include "mozilla/Unused.h" +#include "nsContentUtils.h" +#include "nsTArray.h" + +using namespace mozilla; +using testing::NiceMock; +using testing::Return; + +class MockGraph : public MediaTrackGraphImpl { + public: + MockGraph(TrackRate aRate, uint32_t aChannels) + : MediaTrackGraphImpl(OFFLINE_THREAD_DRIVER, DIRECT_DRIVER, aRate, + aChannels, nullptr, AbstractThread::MainThread()) { + ON_CALL(*this, OnGraphThread).WillByDefault(Return(true)); + // Remove this graph's driver since it holds a ref. If no AppendMessage + // takes place, the driver never starts. This will also make sure no-one + // tries to use it. We are still kept alive by the self-ref. Destroy() must + // be called to break that cycle. + SetCurrentDriver(nullptr); + } + + MOCK_CONST_METHOD0(OnGraphThread, bool()); + + protected: + ~MockGraph() = default; +}; + +// AudioInputProcessing will put extra frames as pre-buffering data to avoid +// glitchs in non pass-through mode. The main goal of the test is to check how +// many frames left in the AudioInputProcessing's mSegment in various situations +// after input data has been processed. +TEST(TestAudioInputProcessing, Buffering) +{ + const TrackRate rate = 8000; // So packet size is 80 + const uint32_t channels = 1; + auto graph = MakeRefPtr<NiceMock<MockGraph>>(rate, channels); + auto aip = MakeRefPtr<AudioInputProcessing>(channels); + + const size_t frames = 72; + + AudioGenerator<AudioDataValue> generator(channels, rate); + GraphTime processedTime; + GraphTime nextTime; + AudioSegment output; + + // Toggle pass-through mode without starting + { + EXPECT_EQ(aip->PassThrough(graph), false); + EXPECT_EQ(aip->NumBufferedFrames(graph), 0); + + aip->SetPassThrough(graph, true); + EXPECT_EQ(aip->NumBufferedFrames(graph), 0); + + aip->SetPassThrough(graph, false); + EXPECT_EQ(aip->NumBufferedFrames(graph), 0); + + aip->SetPassThrough(graph, true); + EXPECT_EQ(aip->NumBufferedFrames(graph), 0); + } + + { + // Need (nextTime - processedTime) = 128 - 0 = 128 frames this round. + // aip has not started and set to processing mode yet, so output will be + // filled with silence data directly. + processedTime = 0; + nextTime = MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(frames); + + AudioSegment input; + generator.Generate(input, nextTime - processedTime); + + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), nextTime); + EXPECT_EQ(aip->NumBufferedFrames(graph), 0); + } + + // Set aip to processing/non-pass-through mode + aip->SetPassThrough(graph, false); + { + // Need (nextTime - processedTime) = 256 - 128 = 128 frames this round. + // aip has not started yet, so output will be filled with silence data + // directly. + processedTime = nextTime; + nextTime = MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(2 * frames); + + AudioSegment input; + generator.Generate(input, nextTime - processedTime); + + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), nextTime); + EXPECT_EQ(aip->NumBufferedFrames(graph), 0); + } + + // aip has been started and set to processing mode so it will insert 80 frames + // into aip's internal buffer as pre-buffering. + aip->Start(graph); + { + // Need (nextTime - processedTime) = 256 - 256 = 0 frames this round. + // The Process() aip will take 0 frames from input, packetize and process + // these frames into 0 80-frame packet(0 frames left in packetizer), insert + // packets into aip's internal buffer, then move 0 frames the internal + // buffer to output, leaving 80 + 0 - 0 = 80 frames in aip's internal + // buffer. + processedTime = nextTime; + nextTime = MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(3 * frames); + + AudioSegment input; + generator.Generate(input, nextTime - processedTime); + + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), nextTime); + EXPECT_EQ(aip->NumBufferedFrames(graph), 80); + } + + { + // Need (nextTime - processedTime) = 384 - 256 = 128 frames this round. + // The Process() aip will take 128 frames from input, packetize and process + // these frames into floor(128/80) = 1 80-frame packet (48 frames left in + // packetizer), insert packets into aip's internal buffer, then move 128 + // frames the internal buffer to output, leaving 80 + 80 - 128 = 32 frames + // in aip's internal buffer. + processedTime = nextTime; + nextTime = MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(4 * frames); + + AudioSegment input; + generator.Generate(input, nextTime - processedTime); + + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), nextTime); + EXPECT_EQ(aip->NumBufferedFrames(graph), 32); + } + + { + // Need (nextTime - processedTime) = 384 - 384 = 0 frames this round. + processedTime = nextTime; + nextTime = MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(5 * frames); + + AudioSegment input; + generator.Generate(input, nextTime - processedTime); + + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), nextTime); + EXPECT_EQ(aip->NumBufferedFrames(graph), 32); + } + + { + // Need (nextTime - processedTime) = 512 - 384 = 128 frames this round. + // The Process() aip will take 128 frames from input, packetize and process + // these frames into floor(128+48/80) = 2 80-frame packet (16 frames left in + // packetizer), insert packets into aip's internal buffer, then move 128 + // frames the internal buffer to output, leaving 32 + 2*80 - 128 = 64 frames + // in aip's internal buffer. + processedTime = nextTime; + nextTime = MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(6 * frames); + + AudioSegment input; + generator.Generate(input, nextTime - processedTime); + + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), nextTime); + EXPECT_EQ(aip->NumBufferedFrames(graph), 64); + } + + aip->SetPassThrough(graph, true); + { + // Need (nextTime - processedTime) = 512 - 512 = 0 frames this round. + // No buffering in pass-through mode + processedTime = nextTime; + nextTime = MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(7 * frames); + + AudioSegment input; + generator.Generate(input, nextTime - processedTime); + + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), processedTime); + EXPECT_EQ(aip->NumBufferedFrames(graph), 0); + } + + aip->Stop(graph); + graph->Destroy(); +} + +TEST(TestAudioInputProcessing, ProcessDataWithDifferentPrincipals) +{ + const TrackRate rate = 48000; // so # of output frames from packetizer is 480 + const uint32_t channels = 2; + auto graph = MakeRefPtr<NiceMock<MockGraph>>(rate, channels); + auto aip = MakeRefPtr<AudioInputProcessing>(channels); + AudioGenerator<AudioDataValue> generator(channels, rate); + + RefPtr<nsIPrincipal> dummy_principal = + NullPrincipal::CreateWithoutOriginAttributes(); + const PrincipalHandle principal1 = MakePrincipalHandle(dummy_principal.get()); + const PrincipalHandle principal2 = + MakePrincipalHandle(nsContentUtils::GetSystemPrincipal()); + + // Total 4800 frames. It's easier to test with frames of multiples of 480. + nsTArray<std::pair<TrackTime, PrincipalHandle>> framesWithPrincipal = { + {100, principal1}, + {200, PRINCIPAL_HANDLE_NONE}, + {300, principal2}, + {400, principal1}, + {440, PRINCIPAL_HANDLE_NONE}, + // 3 packet-size above. + {480, principal1}, + {480, principal2}, + {480, PRINCIPAL_HANDLE_NONE}, + // 3 packet-size above. + {500, principal2}, + {490, principal1}, + {600, principal1}, + {330, principal1} + // 4 packet-size above. + }; + + // Generate 4800 frames of data with different principals. + AudioSegment input; + { + for (const auto& [duration, principal] : framesWithPrincipal) { + AudioSegment data; + generator.Generate(data, duration); + for (AudioSegment::ChunkIterator it(data); !it.IsEnded(); it.Next()) { + it->mPrincipalHandle = principal; + } + + input.AppendFrom(&data); + } + } + + auto verifyPrincipals = [&](const AudioSegment& data) { + TrackTime start = 0; + for (const auto& [duration, principal] : framesWithPrincipal) { + const TrackTime end = start + duration; + + AudioSegment slice; + slice.AppendSlice(data, start, end); + start = end; + + for (AudioSegment::ChunkIterator it(slice); !it.IsEnded(); it.Next()) { + EXPECT_EQ(it->mPrincipalHandle, principal); + } + } + }; + + // Check the principals in audio-processing mode. + EXPECT_EQ(aip->PassThrough(graph), false); + aip->Start(graph); + { + EXPECT_EQ(aip->NumBufferedFrames(graph), 480); + AudioSegment output; + { + // Trim the prebuffering silence. + + AudioSegment data; + aip->Process(graph, 0, 4800, &input, &data); + EXPECT_EQ(input.GetDuration(), 4800); + EXPECT_EQ(data.GetDuration(), 4800); + + AudioSegment dummy; + dummy.AppendNullData(480); + aip->Process(graph, 0, 480, &dummy, &data); + EXPECT_EQ(dummy.GetDuration(), 480); + EXPECT_EQ(data.GetDuration(), 480 + 4800); + + // Ignore the pre-buffering data + output.AppendSlice(data, 480, 480 + 4800); + } + + verifyPrincipals(output); + } + + // Check the principals in pass-through mode. + aip->SetPassThrough(graph, true); + { + AudioSegment output; + aip->Process(graph, 0, 4800, &input, &output); + EXPECT_EQ(input.GetDuration(), 4800); + EXPECT_EQ(output.GetDuration(), 4800); + + verifyPrincipals(output); + } + + aip->Stop(graph); + graph->Destroy(); +} + +TEST(TestAudioInputProcessing, Downmixing) +{ + const TrackRate rate = 44100; + const uint32_t channels = 4; + auto graph = MakeRefPtr<NiceMock<MockGraph>>(rate, channels); + auto aip = MakeRefPtr<AudioInputProcessing>(channels); + + const size_t frames = 44100; + + AudioGenerator<AudioDataValue> generator(channels, rate); + GraphTime processedTime; + GraphTime nextTime; + + aip->SetPassThrough(graph, false); + aip->Start(graph); + + processedTime = 0; + nextTime = MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(frames); + + { + AudioSegment input; + AudioSegment output; + generator.Generate(input, nextTime - processedTime); + + // Intentionally reduce the amplitude of the generated sine wave so there's + // no chance the max amplitude reaches 1.0, but not enough so that 4 + // channels summed together won't clip. + input.ApplyVolume(0.9); + + // Process is going to see that it has 4 channels of input, and is going to + // downmix to mono, scaling the input by 1/4 in the process. + // We can't compare the input and output signal because the sine is going to + // be mangledui + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), nextTime); + EXPECT_EQ(output.MaxChannelCount(), 1u); + + // Verify that it doesn't clip: the input signal has likely been mangled by + // the various processing passes, but at least it shouldn't clip. We know we + // always have floating point audio here, regardless of the sample-type used + // by Gecko. + for (AudioSegment::ChunkIterator iterOutput(output); !iterOutput.IsEnded(); + iterOutput.Next()) { + const float* const output = iterOutput->ChannelData<float>()[0]; + for (uint32_t i = 0; i < iterOutput->GetDuration(); i++) { + // Very conservative here, it's likely that the AGC lowers the volume a + // lot. + EXPECT_LE(std::abs(output[i]), 0.95); + } + } + } + + // Now, repeat the test, checking we get the unmodified 4 channels. + aip->SetPassThrough(graph, true); + + AudioSegment input, output; + processedTime = nextTime; + nextTime += MediaTrackGraphImpl::RoundUpToEndOfAudioBlock(frames); + generator.Generate(input, nextTime - processedTime); + + aip->Process(graph, processedTime, nextTime, &input, &output); + EXPECT_EQ(input.GetDuration(), nextTime - processedTime); + EXPECT_EQ(output.GetDuration(), nextTime - processedTime); + // This time, no downmix: 4 channels of input, 4 channels of output + EXPECT_EQ(output.MaxChannelCount(), 4u); + + nsTArray<AudioDataValue> inputLinearized, outputLinearized; + input.WriteToInterleavedBuffer(inputLinearized, input.MaxChannelCount()); + output.WriteToInterleavedBuffer(outputLinearized, output.MaxChannelCount()); + + // The data should be passed through, and exactly equal. + for (uint32_t i = 0; i < frames * channels; i++) { + EXPECT_EQ(inputLinearized[i], outputLinearized[i]); + } + + aip->Stop(graph); + graph->Destroy(); +} |