1 /*
2 * Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "modules/audio_processing/agc2/rnn_vad/lp_residual.h"
12
13 #include <algorithm>
14 #include <array>
15 #include <vector>
16
17 #include "modules/audio_processing/agc2/rnn_vad/common.h"
18 #include "modules/audio_processing/agc2/rnn_vad/test_utils.h"
19 // TODO(bugs.webrtc.org/8948): Add when the issue is fixed.
20 // #include "test/fpe_observer.h"
21 #include "test/gtest.h"
22
23 namespace webrtc {
24 namespace rnn_vad {
25 namespace {
26
27 // Checks that the LP residual can be computed on an empty frame.
TEST(RnnVadTest,LpResidualOfEmptyFrame)28 TEST(RnnVadTest, LpResidualOfEmptyFrame) {
29 // TODO(bugs.webrtc.org/8948): Add when the issue is fixed.
30 // FloatingPointExceptionObserver fpe_observer;
31
32 // Input frame (empty, i.e., all samples set to 0).
33 std::array<float, kFrameSize10ms24kHz> empty_frame;
34 empty_frame.fill(0.f);
35 // Compute inverse filter coefficients.
36 std::array<float, kNumLpcCoefficients> lpc;
37 ComputeAndPostProcessLpcCoefficients(empty_frame, lpc);
38 // Compute LP residual.
39 std::array<float, kFrameSize10ms24kHz> lp_residual;
40 ComputeLpResidual(lpc, empty_frame, lp_residual);
41 }
42
43 // Checks that the computed LP residual is bit-exact given test input data.
TEST(RnnVadTest,LpResidualPipelineBitExactness)44 TEST(RnnVadTest, LpResidualPipelineBitExactness) {
45 // Input and expected output readers.
46 ChunksFileReader pitch_buffer_reader = CreatePitchBuffer24kHzReader();
47 ChunksFileReader lp_pitch_reader = CreateLpResidualAndPitchInfoReader();
48
49 // Buffers.
50 std::vector<float> pitch_buffer_24kHz(kBufSize24kHz);
51 std::array<float, kNumLpcCoefficients> lpc;
52 std::vector<float> computed_lp_residual(kBufSize24kHz);
53 std::vector<float> expected_lp_residual(kBufSize24kHz);
54
55 // Test length.
56 const int num_frames =
57 std::min(pitch_buffer_reader.num_chunks, 300); // Max 3 s.
58 ASSERT_GE(lp_pitch_reader.num_chunks, num_frames);
59
60 // TODO(bugs.webrtc.org/8948): Add when the issue is fixed.
61 // FloatingPointExceptionObserver fpe_observer;
62 for (int i = 0; i < num_frames; ++i) {
63 SCOPED_TRACE(i);
64 // Read input.
65 ASSERT_TRUE(pitch_buffer_reader.reader->ReadChunk(pitch_buffer_24kHz));
66 // Read expected output (ignore pitch gain and period).
67 ASSERT_TRUE(lp_pitch_reader.reader->ReadChunk(expected_lp_residual));
68 lp_pitch_reader.reader->SeekForward(2); // Pitch period and strength.
69 // Check every 200 ms.
70 if (i % 20 == 0) {
71 ComputeAndPostProcessLpcCoefficients(pitch_buffer_24kHz, lpc);
72 ComputeLpResidual(lpc, pitch_buffer_24kHz, computed_lp_residual);
73 ExpectNearAbsolute(expected_lp_residual, computed_lp_residual, kFloatMin);
74 }
75 }
76 }
77
78 } // namespace
79 } // namespace rnn_vad
80 } // namespace webrtc
81