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/*
* 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.
*/
#include "common_audio/vad/vad_unittest.h"
#include <stdlib.h>
#include "common_audio/signal_processing/include/signal_processing_library.h"
#include "common_audio/vad/include/webrtc_vad.h"
#include "rtc_base/arraysize.h"
#include "rtc_base/checks.h"
#include "test/gtest.h"
VadTest::VadTest() {}
void VadTest::SetUp() {}
void VadTest::TearDown() {}
// Returns true if the rate and frame length combination is valid.
bool VadTest::ValidRatesAndFrameLengths(int rate, size_t frame_length) {
if (rate == 8000) {
if (frame_length == 80 || frame_length == 160 || frame_length == 240) {
return true;
}
return false;
} else if (rate == 16000) {
if (frame_length == 160 || frame_length == 320 || frame_length == 480) {
return true;
}
return false;
} else if (rate == 32000) {
if (frame_length == 320 || frame_length == 640 || frame_length == 960) {
return true;
}
return false;
} else if (rate == 48000) {
if (frame_length == 480 || frame_length == 960 || frame_length == 1440) {
return true;
}
return false;
}
return false;
}
namespace webrtc {
namespace test {
TEST_F(VadTest, ApiTest) {
// This API test runs through the APIs for all possible valid and invalid
// combinations.
VadInst* handle = WebRtcVad_Create();
int16_t zeros[kMaxFrameLength] = {0};
// Construct a speech signal that will trigger the VAD in all modes. It is
// known that (i * i) will wrap around, but that doesn't matter in this case.
int16_t speech[kMaxFrameLength];
for (size_t i = 0; i < kMaxFrameLength; i++) {
speech[i] = static_cast<int16_t>(i * i);
}
// nullptr instance tests
EXPECT_EQ(-1, WebRtcVad_Init(nullptr));
EXPECT_EQ(-1, WebRtcVad_set_mode(nullptr, kModes[0]));
EXPECT_EQ(-1,
WebRtcVad_Process(nullptr, kRates[0], speech, kFrameLengths[0]));
// WebRtcVad_Create()
RTC_CHECK(handle);
// Not initialized tests
EXPECT_EQ(-1, WebRtcVad_Process(handle, kRates[0], speech, kFrameLengths[0]));
EXPECT_EQ(-1, WebRtcVad_set_mode(handle, kModes[0]));
// WebRtcVad_Init() test
ASSERT_EQ(0, WebRtcVad_Init(handle));
// WebRtcVad_set_mode() invalid modes tests. Tries smallest supported value
// minus one and largest supported value plus one.
EXPECT_EQ(-1, WebRtcVad_set_mode(
handle, WebRtcSpl_MinValueW32(kModes, kModesSize) - 1));
EXPECT_EQ(-1, WebRtcVad_set_mode(
handle, WebRtcSpl_MaxValueW32(kModes, kModesSize) + 1));
// WebRtcVad_Process() tests
// nullptr as speech pointer
EXPECT_EQ(-1,
WebRtcVad_Process(handle, kRates[0], nullptr, kFrameLengths[0]));
// Invalid sampling rate
EXPECT_EQ(-1, WebRtcVad_Process(handle, 9999, speech, kFrameLengths[0]));
// All zeros as input should work
EXPECT_EQ(0, WebRtcVad_Process(handle, kRates[0], zeros, kFrameLengths[0]));
for (size_t k = 0; k < kModesSize; k++) {
// Test valid modes
EXPECT_EQ(0, WebRtcVad_set_mode(handle, kModes[k]));
// Loop through sampling rate and frame length combinations
for (size_t i = 0; i < kRatesSize; i++) {
for (size_t j = 0; j < kFrameLengthsSize; j++) {
if (ValidRatesAndFrameLengths(kRates[i], kFrameLengths[j])) {
EXPECT_EQ(1, WebRtcVad_Process(handle, kRates[i], speech,
kFrameLengths[j]));
} else {
EXPECT_EQ(-1, WebRtcVad_Process(handle, kRates[i], speech,
kFrameLengths[j]));
}
}
}
}
WebRtcVad_Free(handle);
}
TEST_F(VadTest, ValidRatesFrameLengths) {
// This test verifies valid and invalid rate/frame_length combinations. We
// loop through some sampling rates and frame lengths from negative values to
// values larger than possible.
const int kRates[] = {-8000, -4000, 0, 4000, 8000, 8001,
15999, 16000, 32000, 48000, 48001, 96000};
const size_t kFrameLengths[] = {0, 80, 81, 159, 160, 240,
320, 480, 640, 960, 1440, 2000};
for (size_t i = 0; i < arraysize(kRates); i++) {
for (size_t j = 0; j < arraysize(kFrameLengths); j++) {
if (ValidRatesAndFrameLengths(kRates[i], kFrameLengths[j])) {
EXPECT_EQ(
0, WebRtcVad_ValidRateAndFrameLength(kRates[i], kFrameLengths[j]));
} else {
EXPECT_EQ(
-1, WebRtcVad_ValidRateAndFrameLength(kRates[i], kFrameLengths[j]));
}
}
}
}
// TODO(bjornv): Add a process test, run on file.
} // namespace test
} // namespace webrtc
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