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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 "webrtc/modules/audio_processing/vad/standalone_vad.h"
#include <string.h>
#include "testing/gtest/include/gtest/gtest.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/modules/include/module_common_types.h"
#include "webrtc/test/testsupport/fileutils.h"
namespace webrtc {
TEST(StandaloneVadTest, Api) {
rtc::scoped_ptr<StandaloneVad> vad(StandaloneVad::Create());
int16_t data[kLength10Ms] = {0};
// Valid frame length (for 32 kHz rate), but not what the VAD is expecting.
EXPECT_EQ(-1, vad->AddAudio(data, 320));
const size_t kMaxNumFrames = 3;
double p[kMaxNumFrames];
for (size_t n = 0; n < kMaxNumFrames; n++)
EXPECT_EQ(0, vad->AddAudio(data, kLength10Ms));
// Pretend |p| is shorter that it should be.
EXPECT_EQ(-1, vad->GetActivity(p, kMaxNumFrames - 1));
EXPECT_EQ(0, vad->GetActivity(p, kMaxNumFrames));
// Ask for activity when buffer is empty.
EXPECT_EQ(-1, vad->GetActivity(p, kMaxNumFrames));
// Should reset and result in one buffer.
for (size_t n = 0; n < kMaxNumFrames + 1; n++)
EXPECT_EQ(0, vad->AddAudio(data, kLength10Ms));
EXPECT_EQ(0, vad->GetActivity(p, 1));
// Wrong modes
EXPECT_EQ(-1, vad->set_mode(-1));
EXPECT_EQ(-1, vad->set_mode(4));
// Valid mode.
const int kMode = 2;
EXPECT_EQ(0, vad->set_mode(kMode));
EXPECT_EQ(kMode, vad->mode());
}
#if defined(WEBRTC_IOS)
TEST(StandaloneVadTest, DISABLED_ActivityDetection) {
#else
TEST(StandaloneVadTest, ActivityDetection) {
#endif
rtc::scoped_ptr<StandaloneVad> vad(StandaloneVad::Create());
const size_t kDataLength = kLength10Ms;
int16_t data[kDataLength] = {0};
FILE* pcm_file =
fopen(test::ResourcePath("audio_processing/agc/agc_audio", "pcm").c_str(),
"rb");
ASSERT_TRUE(pcm_file != NULL);
FILE* reference_file = fopen(
test::ResourcePath("audio_processing/agc/agc_vad", "dat").c_str(), "rb");
ASSERT_TRUE(reference_file != NULL);
// Reference activities are prepared with 0 aggressiveness.
ASSERT_EQ(0, vad->set_mode(0));
// Stand-alone VAD can operate on 1, 2 or 3 frames of length 10 ms. The
// reference file is created for 30 ms frame.
const int kNumVadFramesToProcess = 3;
int num_frames = 0;
while (fread(data, sizeof(int16_t), kDataLength, pcm_file) == kDataLength) {
vad->AddAudio(data, kDataLength);
num_frames++;
if (num_frames == kNumVadFramesToProcess) {
num_frames = 0;
int referece_activity;
double p[kNumVadFramesToProcess];
EXPECT_EQ(1u, fread(&referece_activity, sizeof(referece_activity), 1,
reference_file));
int activity = vad->GetActivity(p, kNumVadFramesToProcess);
EXPECT_EQ(referece_activity, activity);
if (activity != 0) {
// When active, probabilities are set to 0.5.
for (int n = 0; n < kNumVadFramesToProcess; n++)
EXPECT_EQ(0.5, p[n]);
} else {
// When inactive, probabilities are set to 0.01.
for (int n = 0; n < kNumVadFramesToProcess; n++)
EXPECT_EQ(0.01, p[n]);
}
}
}
fclose(reference_file);
fclose(pcm_file);
}
} // namespace webrtc
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