blob: 81f6a24b7d6d5b38baff7fa91d84caaedb45455a [file] [log] [blame]
* Copyright (c) 2013 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.
// Modified from the Chromium original here:
// src/media/base/
#include "common_audio/resampler/sinc_resampler.h"
#include "rtc_base/constructor_magic.h"
namespace webrtc {
// Fake audio source for testing the resampler. Generates a sinusoidal linear
// chirp ( which can be tuned to stress the
// resampler for the specific sample rate conversion being used.
class SinusoidalLinearChirpSource : public SincResamplerCallback {
// |delay_samples| can be used to insert a fractional sample delay into the
// source. It will produce zeros until non-negative time is reached.
SinusoidalLinearChirpSource(int sample_rate,
size_t samples,
double max_frequency,
double delay_samples);
~SinusoidalLinearChirpSource() override {}
void Run(size_t frames, float* destination) override;
double Frequency(size_t position);
enum { kMinFrequency = 5 };
int sample_rate_;
size_t total_samples_;
double max_frequency_;
double k_;
size_t current_index_;
double delay_samples_;
} // namespace webrtc