| /* |
| * 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 "modules/audio_processing/high_pass_filter.h" |
| |
| #include <vector> |
| |
| #include "api/array_view.h" |
| #include "modules/audio_processing/audio_buffer.h" |
| #include "modules/audio_processing/test/audio_buffer_tools.h" |
| #include "modules/audio_processing/test/bitexactness_tools.h" |
| #include "test/gtest.h" |
| |
| namespace webrtc { |
| namespace { |
| |
| // Process one frame of data via the AudioBuffer interface and produce the |
| // output. |
| std::vector<float> ProcessOneFrameAsAudioBuffer( |
| const std::vector<float>& frame_input, |
| const StreamConfig& stream_config, |
| HighPassFilter* high_pass_filter) { |
| AudioBuffer audio_buffer( |
| stream_config.sample_rate_hz(), stream_config.num_channels(), |
| stream_config.sample_rate_hz(), stream_config.num_channels(), |
| stream_config.sample_rate_hz(), stream_config.num_channels()); |
| |
| test::CopyVectorToAudioBuffer(stream_config, frame_input, &audio_buffer); |
| high_pass_filter->Process(&audio_buffer, /*use_split_band_data=*/false); |
| std::vector<float> frame_output; |
| test::ExtractVectorFromAudioBuffer(stream_config, &audio_buffer, |
| &frame_output); |
| return frame_output; |
| } |
| |
| // Process one frame of data via the vector interface and produce the output. |
| std::vector<float> ProcessOneFrameAsVector( |
| const std::vector<float>& frame_input, |
| const StreamConfig& stream_config, |
| HighPassFilter* high_pass_filter) { |
| std::vector<std::vector<float>> process_vector( |
| stream_config.num_channels(), |
| std::vector<float>(stream_config.num_frames())); |
| |
| for (size_t k = 0; k < stream_config.num_frames(); ++k) { |
| for (size_t channel = 0; channel < stream_config.num_channels(); |
| ++channel) { |
| process_vector[channel][k] = |
| frame_input[k * stream_config.num_channels() + channel]; |
| } |
| } |
| |
| high_pass_filter->Process(&process_vector); |
| |
| std::vector<float> output; |
| for (size_t k = 0; k < stream_config.num_frames(); ++k) { |
| for (size_t channel = 0; channel < stream_config.num_channels(); |
| ++channel) { |
| output.push_back(process_vector[channel][k]); |
| } |
| } |
| |
| return process_vector[0]; |
| } |
| |
| // Processes a specified amount of frames, verifies the results and reports |
| // any errors. |
| void RunBitexactnessTest(int num_channels, |
| bool use_audio_buffer_interface, |
| const std::vector<float>& input, |
| const std::vector<float>& reference) { |
| const StreamConfig stream_config(16000, num_channels, false); |
| HighPassFilter high_pass_filter(16000, num_channels); |
| |
| std::vector<float> output; |
| const size_t num_frames_to_process = |
| input.size() / |
| (stream_config.num_frames() * stream_config.num_channels()); |
| for (size_t frame_no = 0; frame_no < num_frames_to_process; ++frame_no) { |
| std::vector<float> frame_input( |
| input.begin() + stream_config.num_frames() * |
| stream_config.num_channels() * frame_no, |
| input.begin() + stream_config.num_frames() * |
| stream_config.num_channels() * (frame_no + 1)); |
| if (use_audio_buffer_interface) { |
| output = ProcessOneFrameAsAudioBuffer(frame_input, stream_config, |
| &high_pass_filter); |
| } else { |
| output = ProcessOneFrameAsVector(frame_input, stream_config, |
| &high_pass_filter); |
| } |
| } |
| |
| // Form vector to compare the reference to. Only the last frame processed |
| // is compared in order not having to specify all preceeding frames as |
| // inputs. As the algorithm being tested has a memory, testing only |
| // the last frame implicitly also tests the preceeding frames. |
| const size_t reference_frame_length = |
| reference.size() / stream_config.num_channels(); |
| std::vector<float> output_to_verify; |
| for (size_t channel_no = 0; channel_no < stream_config.num_channels(); |
| ++channel_no) { |
| output_to_verify.insert( |
| output_to_verify.end(), |
| output.begin() + channel_no * stream_config.num_frames(), |
| output.begin() + channel_no * stream_config.num_frames() + |
| reference_frame_length); |
| } |
| |
| const float kElementErrorBound = 1.0f / 32768.0f; |
| EXPECT_TRUE(test::VerifyDeinterleavedArray( |
| reference_frame_length, num_channels, reference, output_to_verify, |
| kElementErrorBound)); |
| } |
| |
| // Method for forming a vector out of an array. |
| // TODO(peah): Remove once braced initialization is allowed. |
| std::vector<float> CreateVector(const rtc::ArrayView<const float>& array_view) { |
| std::vector<float> v; |
| for (auto value : array_view) { |
| v.push_back(value); |
| } |
| return v; |
| } |
| } // namespace |
| |
| TEST(HighPassFilterAccuracyTest, ResetWithAudioBufferInterface) { |
| const StreamConfig stream_config_stereo(16000, 2, false); |
| const StreamConfig stream_config_mono(16000, 1, false); |
| std::vector<float> x_mono(160, 1.f); |
| std::vector<float> x_stereo(320, 1.f); |
| HighPassFilter hpf(16000, 1); |
| std::vector<float> y = |
| ProcessOneFrameAsAudioBuffer(x_mono, stream_config_mono, &hpf); |
| hpf.Reset(2); |
| y = ProcessOneFrameAsAudioBuffer(x_stereo, stream_config_stereo, &hpf); |
| hpf.Reset(1); |
| y = ProcessOneFrameAsAudioBuffer(x_mono, stream_config_mono, &hpf); |
| hpf.Reset(); |
| y = ProcessOneFrameAsAudioBuffer(x_mono, stream_config_mono, &hpf); |
| } |
| |
| TEST(HighPassFilterAccuracyTest, ResetWithVectorInterface) { |
| const StreamConfig stream_config_stereo(16000, 2, false); |
| const StreamConfig stream_config_mono(16000, 1, false); |
| std::vector<float> x_mono(160, 1.f); |
| std::vector<float> x_stereo(320, 1.f); |
| HighPassFilter hpf(16000, 1); |
| std::vector<float> y = |
| ProcessOneFrameAsVector(x_mono, stream_config_mono, &hpf); |
| hpf.Reset(2); |
| y = ProcessOneFrameAsVector(x_stereo, stream_config_stereo, &hpf); |
| hpf.Reset(1); |
| y = ProcessOneFrameAsVector(x_mono, stream_config_mono, &hpf); |
| hpf.Reset(); |
| y = ProcessOneFrameAsVector(x_mono, stream_config_mono, &hpf); |
| } |
| |
| TEST(HighPassFilterAccuracyTest, MonoInitial) { |
| const float kReferenceInput[] = { |
| 0.150254f, 0.512488f, -0.631245f, 0.240938f, 0.089080f, -0.365440f, |
| -0.121169f, 0.095748f, 1.000000f, 0.773932f, -0.377232f, 0.848124f, |
| 0.202718f, -0.017621f, 0.199738f, -0.057279f, -0.034693f, 0.416303f, |
| 0.393761f, 0.396041f, 0.187653f, -0.337438f, 0.200436f, 0.455577f, |
| 0.136624f, 0.289150f, 0.203131f, -0.084798f, 0.082124f, -0.220010f, |
| 0.248266f, -0.320554f, -0.298701f, -0.226218f, -0.822794f, 0.401962f, |
| 0.090876f, -0.210968f, 0.382936f, -0.478291f, -0.028572f, -0.067474f, |
| 0.089204f, 0.087430f, -0.241695f, -0.008398f, -0.046076f, 0.175416f, |
| 0.305518f, 0.309992f, -0.241352f, 0.021618f, -0.339291f, -0.311173f, |
| -0.001914f, 0.428301f, -0.215087f, 0.103784f, -0.063041f, 0.312250f, |
| -0.304344f, 0.009098f, 0.154406f, 0.307571f, 0.431537f, 0.024014f, |
| -0.416832f, -0.207440f, -0.296664f, 0.656846f, -0.172033f, 0.209054f, |
| -0.053772f, 0.248326f, -0.213741f, -0.391871f, -0.397490f, 0.136428f, |
| -0.049568f, -0.054788f, 0.396633f, 0.081485f, 0.055279f, 0.443690f, |
| -0.224812f, 0.194675f, 0.233369f, -0.068107f, 0.060270f, -0.325801f, |
| -0.320801f, 0.029308f, 0.201837f, 0.722528f, -0.186366f, 0.052351f, |
| -0.023053f, -0.540192f, -0.122671f, -0.501532f, 0.234847f, -0.248165f, |
| 0.027971f, -0.152171f, 0.084820f, -0.167764f, 0.136923f, 0.206619f, |
| 0.478395f, -0.054249f, -0.597574f, -0.234627f, 0.378548f, -0.299619f, |
| 0.268543f, 0.034666f, 0.401492f, -0.547983f, -0.055248f, -0.337538f, |
| 0.812657f, 0.230611f, 0.385360f, -0.295713f, -0.130957f, -0.076143f, |
| 0.306960f, -0.077653f, 0.196049f, -0.573390f, -0.098885f, -0.230155f, |
| -0.440716f, 0.141956f, 0.078802f, 0.009356f, -0.372703f, 0.315083f, |
| 0.097859f, -0.083575f, 0.006397f, -0.073216f, -0.489105f, -0.079827f, |
| -0.232329f, -0.273644f, -0.323162f, -0.149105f, -0.559646f, 0.269458f, |
| 0.145333f, -0.005597f, -0.009717f, -0.223051f, 0.284676f, -0.037228f, |
| -0.199679f, 0.377651f, -0.062813f, -0.164607f}; |
| const float kReference[] = {0.146139f, 0.490336f, -0.649520f, 0.233881f, |
| 0.073214f, -0.373256f, -0.115394f, 0.102109f, |
| 0.976217f, 0.702270f, -0.457697f, 0.757116f}; |
| |
| for (bool use_audio_buffer_interface : {true, false}) { |
| RunBitexactnessTest( |
| 1, use_audio_buffer_interface, |
| CreateVector(rtc::ArrayView<const float>(kReferenceInput)), |
| CreateVector(rtc::ArrayView<const float>(kReference))); |
| } |
| } |
| |
| TEST(HighPassFilterAccuracyTest, MonoConverged) { |
| const float kReferenceInput[] = { |
| 0.150254f, 0.512488f, -0.631245f, 0.240938f, 0.089080f, -0.365440f, |
| -0.121169f, 0.095748f, 1.000000f, 0.773932f, -0.377232f, 0.848124f, |
| 0.202718f, -0.017621f, 0.199738f, -0.057279f, -0.034693f, 0.416303f, |
| 0.393761f, 0.396041f, 0.187653f, -0.337438f, 0.200436f, 0.455577f, |
| 0.136624f, 0.289150f, 0.203131f, -0.084798f, 0.082124f, -0.220010f, |
| 0.248266f, -0.320554f, -0.298701f, -0.226218f, -0.822794f, 0.401962f, |
| 0.090876f, -0.210968f, 0.382936f, -0.478291f, -0.028572f, -0.067474f, |
| 0.089204f, 0.087430f, -0.241695f, -0.008398f, -0.046076f, 0.175416f, |
| 0.305518f, 0.309992f, -0.241352f, 0.021618f, -0.339291f, -0.311173f, |
| -0.001914f, 0.428301f, -0.215087f, 0.103784f, -0.063041f, 0.312250f, |
| -0.304344f, 0.009098f, 0.154406f, 0.307571f, 0.431537f, 0.024014f, |
| -0.416832f, -0.207440f, -0.296664f, 0.656846f, -0.172033f, 0.209054f, |
| -0.053772f, 0.248326f, -0.213741f, -0.391871f, -0.397490f, 0.136428f, |
| -0.049568f, -0.054788f, 0.396633f, 0.081485f, 0.055279f, 0.443690f, |
| -0.224812f, 0.194675f, 0.233369f, -0.068107f, 0.060270f, -0.325801f, |
| -0.320801f, 0.029308f, 0.201837f, 0.722528f, -0.186366f, 0.052351f, |
| -0.023053f, -0.540192f, -0.122671f, -0.501532f, 0.234847f, -0.248165f, |
| 0.027971f, -0.152171f, 0.084820f, -0.167764f, 0.136923f, 0.206619f, |
| 0.478395f, -0.054249f, -0.597574f, -0.234627f, 0.378548f, -0.299619f, |
| 0.268543f, 0.034666f, 0.401492f, -0.547983f, -0.055248f, -0.337538f, |
| 0.812657f, 0.230611f, 0.385360f, -0.295713f, -0.130957f, -0.076143f, |
| 0.306960f, -0.077653f, 0.196049f, -0.573390f, -0.098885f, -0.230155f, |
| -0.440716f, 0.141956f, 0.078802f, 0.009356f, -0.372703f, 0.315083f, |
| 0.097859f, -0.083575f, 0.006397f, -0.073216f, -0.489105f, -0.079827f, |
| -0.232329f, -0.273644f, -0.323162f, -0.149105f, -0.559646f, 0.269458f, |
| 0.145333f, -0.005597f, -0.009717f, -0.223051f, 0.284676f, -0.037228f, |
| -0.199679f, 0.377651f, -0.062813f, -0.164607f, -0.082091f, -0.236957f, |
| -0.313025f, 0.705903f, 0.462637f, 0.085942f, -0.351308f, -0.241859f, |
| -0.049333f, 0.221165f, -0.372235f, -0.651092f, -0.404957f, 0.093201f, |
| 0.109366f, 0.126224f, -0.036409f, 0.051333f, -0.133063f, 0.240896f, |
| -0.380532f, 0.127160f, -0.237176f, -0.093586f, 0.154478f, 0.290379f, |
| -0.312329f, 0.352297f, 0.184480f, -0.018965f, -0.054555f, -0.060811f, |
| -0.084705f, 0.006440f, 0.014333f, 0.230847f, 0.426721f, 0.130481f, |
| -0.058605f, 0.174712f, 0.051204f, -0.287773f, 0.265265f, 0.085810f, |
| 0.037775f, 0.143988f, 0.073051f, -0.263103f, -0.045366f, -0.040816f, |
| -0.148673f, 0.470072f, -0.244727f, -0.135204f, -0.198973f, -0.328139f, |
| -0.053722f, -0.076590f, 0.427586f, -0.069591f, -0.297399f, 0.448094f, |
| 0.345037f, -0.064170f, -0.420903f, -0.124253f, -0.043578f, 0.077149f, |
| -0.072983f, 0.123916f, 0.109517f, -0.349508f, -0.264912f, -0.207106f, |
| -0.141912f, -0.089586f, 0.003485f, -0.846518f, -0.127715f, 0.347208f, |
| -0.298095f, 0.260935f, 0.097899f, -0.008106f, 0.050987f, -0.437362f, |
| -0.023625f, 0.448230f, 0.027484f, 0.011562f, -0.205167f, -0.008611f, |
| 0.064930f, 0.119156f, -0.104183f, -0.066078f, 0.565530f, -0.631108f, |
| 0.623029f, 0.094334f, 0.279472f, -0.465059f, -0.164888f, -0.077706f, |
| 0.118130f, -0.466746f, 0.131800f, -0.338936f, 0.018497f, 0.182304f, |
| 0.091398f, 0.302547f, 0.281153f, -0.181899f, 0.071836f, -0.263911f, |
| -0.369380f, 0.258447f, 0.000014f, -0.015347f, 0.254619f, 0.166159f, |
| 0.097865f, 0.349389f, 0.259834f, 0.067003f, -0.192925f, -0.182080f, |
| 0.333139f, -0.450434f, -0.006836f, -0.544615f, 0.285183f, 0.240811f, |
| 0.000325f, -0.019796f, -0.694804f, 0.162411f, -0.612686f, -0.648134f, |
| 0.022338f, -0.265058f, 0.114993f, 0.189185f, 0.239697f, -0.193148f, |
| 0.125581f, 0.028122f, 0.230849f, 0.149832f, 0.250919f, -0.036871f, |
| -0.041136f, 0.281627f, -0.593466f, -0.141009f, -0.355074f, -0.106915f, |
| 0.181276f, 0.230753f, -0.283631f, -0.131643f, 0.038292f, -0.081563f, |
| 0.084345f, 0.111763f, -0.259882f, -0.049416f, -0.595824f, 0.320077f, |
| -0.175802f, -0.336422f, -0.070966f, -0.399242f, -0.005829f, -0.156680f, |
| 0.608591f, 0.318150f, -0.697767f, 0.123331f, -0.390716f, -0.071276f, |
| 0.045943f, 0.208958f, -0.076304f, 0.440505f, -0.134400f, 0.091525f, |
| 0.185763f, 0.023806f, 0.246186f, 0.090323f, -0.219133f, -0.504520f, |
| 0.519393f, -0.168939f, 0.028884f, 0.157380f, 0.031745f, -0.252830f, |
| -0.130705f, -0.034901f, 0.413302f, -0.240559f, 0.219279f, 0.086246f, |
| -0.065353f, -0.295376f, -0.079405f, -0.024226f, -0.410629f, 0.053706f, |
| -0.229794f, -0.026336f, 0.093956f, -0.252810f, -0.080555f, 0.097827f, |
| -0.513040f, 0.289508f, 0.677527f, 0.268109f, -0.088244f, 0.119781f, |
| -0.289511f, 0.524778f, 0.262884f, 0.220028f, -0.244767f, 0.089411f, |
| -0.156018f, -0.087030f, -0.159292f, -0.286646f, -0.253953f, -0.058657f, |
| -0.474756f, 0.169797f, -0.032919f, 0.195384f, 0.075355f, 0.138131f, |
| -0.414465f, -0.285118f, -0.124915f, 0.030645f, 0.315431f, -0.081032f, |
| 0.352546f, 0.132860f, 0.328112f, 0.035476f, -0.183550f, -0.413984f, |
| 0.043452f, 0.228748f, -0.081765f, -0.151125f, -0.086251f, -0.306448f, |
| -0.137774f, -0.050508f, 0.012811f, -0.017824f, 0.170841f, 0.030549f, |
| 0.506935f, 0.087197f, 0.504274f, -0.202080f, 0.147146f, -0.072728f, |
| 0.167713f, 0.165977f, -0.610894f, -0.370849f, -0.402698f, 0.112297f, |
| 0.410855f, -0.091330f, 0.227008f, 0.152454f, -0.293884f, 0.111074f, |
| -0.210121f, 0.423728f, -0.009101f, 0.457188f, -0.118785f, 0.164720f, |
| -0.017547f, -0.565046f, -0.274461f, 0.171169f, -0.015338f, -0.312635f, |
| -0.175044f, 0.069729f, -0.277504f, 0.272454f, -0.179049f, 0.505495f, |
| -0.301774f, 0.055664f, -0.425058f, -0.202222f, -0.165787f, 0.112155f, |
| 0.263284f, 0.083972f, -0.104256f, 0.227892f, 0.223253f, 0.033592f, |
| 0.159638f, 0.115358f, -0.275811f, 0.212265f, -0.183658f, -0.168768f}; |
| |
| const float kReference[] = {-0.248836f, -0.086982f, 0.083715f, -0.036787f, |
| 0.127212f, 0.147464f, -0.221733f, -0.004484f, |
| -0.535107f, 0.385999f, -0.116346f, -0.265302f}; |
| |
| for (bool use_audio_buffer_interface : {true, false}) { |
| RunBitexactnessTest( |
| 1, use_audio_buffer_interface, |
| CreateVector(rtc::ArrayView<const float>(kReferenceInput)), |
| CreateVector(rtc::ArrayView<const float>(kReference))); |
| } |
| } |
| |
| } // namespace webrtc |
