68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2017 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 <math.h>
|
|
#include <string.h>
|
|
|
|
#include <algorithm>
|
|
#include <bitset>
|
|
#include <vector>
|
|
|
|
#include "api/audio/echo_detector_creator.h"
|
|
#include "rtc_base/checks.h"
|
|
#include "rtc_base/ref_counted_object.h"
|
|
|
|
namespace webrtc {
|
|
|
|
void FuzzOneInput(const uint8_t* data, size_t size) {
|
|
// Number of times to update the echo detector.
|
|
constexpr size_t kNrOfUpdates = 7;
|
|
// Each round of updates requires a call to both AnalyzeRender and
|
|
// AnalyzeCapture, so the amount of needed input bytes doubles. Also, two
|
|
// bytes are used to set the call order.
|
|
constexpr size_t kNrOfNeededInputBytes = 2 * kNrOfUpdates * sizeof(float) + 2;
|
|
// The maximum audio energy that an audio frame can have is equal to the
|
|
// number of samples in the frame multiplied by 2^30. We use a single sample
|
|
// to represent an audio frame in this test, so it should have a maximum value
|
|
// equal to the square root of that value.
|
|
const float maxFuzzedValue = sqrtf(20 * 48) * 32768;
|
|
if (size < kNrOfNeededInputBytes) {
|
|
return;
|
|
}
|
|
size_t read_idx = 0;
|
|
// Use the first two bytes to choose the call order.
|
|
uint16_t call_order_int;
|
|
memcpy(&call_order_int, &data[read_idx], 2);
|
|
read_idx += 2;
|
|
std::bitset<16> call_order(call_order_int);
|
|
|
|
rtc::scoped_refptr<EchoDetector> echo_detector = CreateEchoDetector();
|
|
std::vector<float> input(1);
|
|
// Call AnalyzeCaptureAudio once to prevent the flushing of the buffer.
|
|
echo_detector->AnalyzeCaptureAudio(input);
|
|
for (size_t i = 0; i < 2 * kNrOfUpdates; ++i) {
|
|
// Convert 4 input bytes to a float.
|
|
RTC_DCHECK_LE(read_idx + sizeof(float), size);
|
|
memcpy(input.data(), &data[read_idx], sizeof(float));
|
|
read_idx += sizeof(float);
|
|
if (!isfinite(input[0]) || fabs(input[0]) > maxFuzzedValue) {
|
|
// Ignore infinity, nan values and values that are unrealistically large.
|
|
continue;
|
|
}
|
|
if (call_order[i]) {
|
|
echo_detector->AnalyzeRenderAudio(input);
|
|
} else {
|
|
echo_detector->AnalyzeCaptureAudio(input);
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace webrtc
|