зеркало из https://github.com/mozilla/gecko-dev.git
579 строки
22 KiB
C++
579 строки
22 KiB
C++
/*
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* Copyright © 2017 Mozilla Foundation
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*
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* This program is made available under an ISC-style license. See the
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* accompanying file LICENSE for details.
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*/
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/* libcubeb api/function test. Requests a loopback device and checks that
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output is being looped back to input. NOTE: Usage of output devices while
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performing this test will cause flakey results! */
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#include "gtest/gtest.h"
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#if !defined(_XOPEN_SOURCE)
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#define _XOPEN_SOURCE 600
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <algorithm>
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#include <memory>
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#include <mutex>
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#include <string>
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#include "cubeb/cubeb.h"
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//#define ENABLE_NORMAL_LOG
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//#define ENABLE_VERBOSE_LOG
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#include "common.h"
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const uint32_t SAMPLE_FREQUENCY = 48000;
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const uint32_t TONE_FREQUENCY = 440;
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const double OUTPUT_AMPLITUDE = 0.25;
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const uint32_t NUM_FRAMES_TO_OUTPUT = SAMPLE_FREQUENCY / 20; /* play ~50ms of samples */
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template<typename T> T ConvertSampleToOutput(double input);
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template<> float ConvertSampleToOutput(double input) { return float(input); }
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template<> short ConvertSampleToOutput(double input) { return short(input * 32767.0f); }
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template<typename T> double ConvertSampleFromOutput(T sample);
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template<> double ConvertSampleFromOutput(float sample) { return double(sample); }
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template<> double ConvertSampleFromOutput(short sample) { return double(sample / 32767.0); }
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/* Simple cross correlation to help find phase shift. Not a performant impl */
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std::vector<double> cross_correlate(std::vector<double> & f,
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std::vector<double> & g,
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size_t signal_length)
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{
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/* the length we sweep our window through to find the cross correlation */
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size_t sweep_length = f.size() - signal_length + 1;
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std::vector<double> correlation;
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correlation.reserve(sweep_length);
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for (size_t i = 0; i < sweep_length; i++) {
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double accumulator = 0.0;
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for (size_t j = 0; j < signal_length; j++) {
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accumulator += f.at(j) * g.at(i + j);
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}
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correlation.push_back(accumulator);
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}
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return correlation;
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}
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/* best effort discovery of phase shift between output and (looped) input*/
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size_t find_phase(std::vector<double> & output_frames,
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std::vector<double> & input_frames,
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size_t signal_length)
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{
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std::vector<double> correlation = cross_correlate(output_frames, input_frames, signal_length);
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size_t phase = 0;
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double max_correlation = correlation.at(0);
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for (size_t i = 1; i < correlation.size(); i++) {
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if (correlation.at(i) > max_correlation) {
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max_correlation = correlation.at(i);
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phase = i;
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}
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}
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return phase;
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}
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std::vector<double> normalize_frames(std::vector<double> & frames) {
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double max = abs(*std::max_element(frames.begin(), frames.end(),
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[](double a, double b) { return abs(a) < abs(b); }));
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std::vector<double> normalized_frames;
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normalized_frames.reserve(frames.size());
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for (const double frame : frames) {
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normalized_frames.push_back(frame / max);
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}
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return normalized_frames;
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}
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/* heuristic comparison of aligned output and input signals, gets flaky if TONE_FREQUENCY is too high */
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void compare_signals(std::vector<double> & output_frames,
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std::vector<double> & input_frames)
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{
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ASSERT_EQ(output_frames.size(), input_frames.size()) << "#Output frames != #input frames";
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size_t num_frames = output_frames.size();
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std::vector<double> normalized_output_frames = normalize_frames(output_frames);
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std::vector<double> normalized_input_frames = normalize_frames(input_frames);
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/* calculate mean absolute errors */
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/* mean absolute errors between output and input */
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double io_mas = 0.0;
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/* mean absolute errors between output and silence */
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double output_silence_mas = 0.0;
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/* mean absolute errors between input and silence */
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double input_silence_mas = 0.0;
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for (size_t i = 0; i < num_frames; i++) {
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io_mas += abs(normalized_output_frames.at(i) - normalized_input_frames.at(i));
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output_silence_mas += abs(normalized_output_frames.at(i));
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input_silence_mas += abs(normalized_input_frames.at(i));
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}
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io_mas /= num_frames;
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output_silence_mas /= num_frames;
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input_silence_mas /= num_frames;
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ASSERT_LT(io_mas, output_silence_mas)
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<< "Error between output and input should be less than output and silence!";
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ASSERT_LT(io_mas, input_silence_mas)
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<< "Error between output and input should be less than output and silence!";
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/* make sure extrema are in (roughly) correct location */
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/* number of maxima + minama expected in the frames*/
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const long NUM_EXTREMA = 2 * TONE_FREQUENCY * NUM_FRAMES_TO_OUTPUT / SAMPLE_FREQUENCY;
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/* expected index of first maxima */
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const long FIRST_MAXIMUM_INDEX = SAMPLE_FREQUENCY / TONE_FREQUENCY / 4;
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/* Threshold we expect all maxima and minima to be above or below. Ideally
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the extrema would be 1 or -1, but particularly at the start of loopback
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the values seen can be significantly lower. */
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const double THRESHOLD = 0.5;
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for (size_t i = 0; i < NUM_EXTREMA; i++) {
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bool is_maximum = i % 2 == 0;
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/* expected offset to current extreme: i * stide between extrema */
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size_t offset = i * SAMPLE_FREQUENCY / TONE_FREQUENCY / 2;
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if (is_maximum) {
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ASSERT_GT(normalized_output_frames.at(FIRST_MAXIMUM_INDEX + offset), THRESHOLD)
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<< "Output frames have unexpected missing maximum!";
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ASSERT_GT(normalized_input_frames.at(FIRST_MAXIMUM_INDEX + offset), THRESHOLD)
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<< "Input frames have unexpected missing maximum!";
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} else {
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ASSERT_LT(normalized_output_frames.at(FIRST_MAXIMUM_INDEX + offset), -THRESHOLD)
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<< "Output frames have unexpected missing minimum!";
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ASSERT_LT(normalized_input_frames.at(FIRST_MAXIMUM_INDEX + offset), -THRESHOLD)
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<< "Input frames have unexpected missing minimum!";
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}
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}
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}
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struct user_state_loopback {
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std::mutex user_state_mutex;
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long position = 0;
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/* track output */
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std::vector<double> output_frames;
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/* track input */
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std::vector<double> input_frames;
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};
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template<typename T>
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long data_cb_loop_duplex(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
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{
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struct user_state_loopback * u = (struct user_state_loopback *) user;
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T * ib = (T *) inputbuffer;
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T * ob = (T *) outputbuffer;
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if (stream == NULL || inputbuffer == NULL || outputbuffer == NULL) {
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return CUBEB_ERROR;
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}
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std::lock_guard<std::mutex> lock(u->user_state_mutex);
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/* generate our test tone on the fly */
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for (int i = 0; i < nframes; i++) {
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double tone = 0.0;
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if (u->position + i < NUM_FRAMES_TO_OUTPUT) {
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/* generate sine wave */
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tone = sin(2 * M_PI*(i + u->position) * TONE_FREQUENCY / SAMPLE_FREQUENCY);
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tone *= OUTPUT_AMPLITUDE;
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}
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ob[i] = ConvertSampleToOutput<T>(tone);
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u->output_frames.push_back(tone);
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/* store any looped back output, may be silence */
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u->input_frames.push_back(ConvertSampleFromOutput(ib[i]));
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}
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u->position += nframes;
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return nframes;
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}
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template<typename T>
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long data_cb_loop_input_only(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
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{
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struct user_state_loopback * u = (struct user_state_loopback *) user;
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T * ib = (T *) inputbuffer;
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if (outputbuffer != NULL) {
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// Can't assert as it needs to return, so expect to fail instead
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EXPECT_EQ(outputbuffer, (void *) NULL) << "outputbuffer should be null in input only callback";
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return CUBEB_ERROR;
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}
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if (stream == NULL || inputbuffer == NULL) {
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return CUBEB_ERROR;
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}
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std::lock_guard<std::mutex> lock(u->user_state_mutex);
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for (int i = 0; i < nframes; i++) {
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u->input_frames.push_back(ConvertSampleFromOutput(ib[i]));
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}
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return nframes;
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}
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template<typename T>
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long data_cb_playback(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
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{
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struct user_state_loopback * u = (struct user_state_loopback *) user;
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T * ob = (T *) outputbuffer;
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if (stream == NULL || outputbuffer == NULL) {
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return CUBEB_ERROR;
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}
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std::lock_guard<std::mutex> lock(u->user_state_mutex);
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/* generate our test tone on the fly */
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for (int i = 0; i < nframes; i++) {
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double tone = 0.0;
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if (u->position + i < NUM_FRAMES_TO_OUTPUT) {
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/* generate sine wave */
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tone = sin(2 * M_PI*(i + u->position) * TONE_FREQUENCY / SAMPLE_FREQUENCY);
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tone *= OUTPUT_AMPLITUDE;
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}
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ob[i] = ConvertSampleToOutput<T>(tone);
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u->output_frames.push_back(tone);
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}
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u->position += nframes;
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return nframes;
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}
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void state_cb_loop(cubeb_stream * stream, void * /*user*/, cubeb_state state)
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{
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if (stream == NULL)
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return;
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switch (state) {
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case CUBEB_STATE_STARTED:
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fprintf(stderr, "stream started\n"); break;
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case CUBEB_STATE_STOPPED:
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fprintf(stderr, "stream stopped\n"); break;
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case CUBEB_STATE_DRAINED:
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fprintf(stderr, "stream drained\n"); break;
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default:
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fprintf(stderr, "unknown stream state %d\n", state);
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}
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return;
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}
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void run_loopback_duplex_test(bool is_float)
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{
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cubeb * ctx;
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cubeb_stream * stream;
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cubeb_stream_params input_params;
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cubeb_stream_params output_params;
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int r;
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uint32_t latency_frames = 0;
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r = common_init(&ctx, "Cubeb loopback example: duplex stream");
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ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";
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std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
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cleanup_cubeb_at_exit(ctx, cubeb_destroy);
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input_params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16LE;
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input_params.rate = SAMPLE_FREQUENCY;
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input_params.channels = 1;
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input_params.layout = CUBEB_LAYOUT_MONO;
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input_params.prefs = CUBEB_STREAM_PREF_LOOPBACK;
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output_params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16LE;
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output_params.rate = SAMPLE_FREQUENCY;
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output_params.channels = 1;
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output_params.layout = CUBEB_LAYOUT_MONO;
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output_params.prefs = CUBEB_STREAM_PREF_NONE;
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std::unique_ptr<user_state_loopback> user_data(new user_state_loopback());
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ASSERT_TRUE(!!user_data) << "Error allocating user data";
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r = cubeb_get_min_latency(ctx, &output_params, &latency_frames);
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ASSERT_EQ(r, CUBEB_OK) << "Could not get minimal latency";
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/* setup a duplex stream with loopback */
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r = cubeb_stream_init(ctx, &stream, "Cubeb loopback",
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NULL, &input_params, NULL, &output_params, latency_frames,
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is_float ? data_cb_loop_duplex<float> : data_cb_loop_duplex<short>,
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state_cb_loop, user_data.get());
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ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";
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std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
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cleanup_stream_at_exit(stream, cubeb_stream_destroy);
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cubeb_stream_start(stream);
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delay(300);
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cubeb_stream_stop(stream);
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/* access after stop should not happen, but lock just in case and to appease sanitization tools */
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std::lock_guard<std::mutex> lock(user_data->user_state_mutex);
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std::vector<double> & output_frames = user_data->output_frames;
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std::vector<double> & input_frames = user_data->input_frames;
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ASSERT_EQ(output_frames.size(), input_frames.size())
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<< "#Output frames != #input frames";
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size_t phase = find_phase(user_data->output_frames, user_data->input_frames, NUM_FRAMES_TO_OUTPUT);
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/* extract vectors of just the relevant signal from output and input */
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auto output_frames_signal_start = output_frames.begin();
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auto output_frames_signal_end = output_frames.begin() + NUM_FRAMES_TO_OUTPUT;
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std::vector<double> trimmed_output_frames(output_frames_signal_start, output_frames_signal_end);
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auto input_frames_signal_start = input_frames.begin() + phase;
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auto input_frames_signal_end = input_frames.begin() + phase + NUM_FRAMES_TO_OUTPUT;
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std::vector<double> trimmed_input_frames(input_frames_signal_start, input_frames_signal_end);
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compare_signals(trimmed_output_frames, trimmed_input_frames);
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}
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TEST(cubeb, loopback_duplex)
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{
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run_loopback_duplex_test(true);
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run_loopback_duplex_test(false);
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}
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void run_loopback_separate_streams_test(bool is_float)
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{
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cubeb * ctx;
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cubeb_stream * input_stream;
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cubeb_stream * output_stream;
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cubeb_stream_params input_params;
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cubeb_stream_params output_params;
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int r;
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uint32_t latency_frames = 0;
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r = common_init(&ctx, "Cubeb loopback example: separate streams");
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ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";
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std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
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cleanup_cubeb_at_exit(ctx, cubeb_destroy);
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input_params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16LE;
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input_params.rate = SAMPLE_FREQUENCY;
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input_params.channels = 1;
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input_params.layout = CUBEB_LAYOUT_MONO;
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input_params.prefs = CUBEB_STREAM_PREF_LOOPBACK;
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output_params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16LE;
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output_params.rate = SAMPLE_FREQUENCY;
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output_params.channels = 1;
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output_params.layout = CUBEB_LAYOUT_MONO;
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output_params.prefs = CUBEB_STREAM_PREF_NONE;
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std::unique_ptr<user_state_loopback> user_data(new user_state_loopback());
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ASSERT_TRUE(!!user_data) << "Error allocating user data";
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r = cubeb_get_min_latency(ctx, &output_params, &latency_frames);
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ASSERT_EQ(r, CUBEB_OK) << "Could not get minimal latency";
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/* setup an input stream with loopback */
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r = cubeb_stream_init(ctx, &input_stream, "Cubeb loopback input only",
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NULL, &input_params, NULL, NULL, latency_frames,
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is_float ? data_cb_loop_input_only<float> : data_cb_loop_input_only<short>,
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state_cb_loop, user_data.get());
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ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";
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std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
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cleanup_input_stream_at_exit(input_stream, cubeb_stream_destroy);
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/* setup an output stream */
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r = cubeb_stream_init(ctx, &output_stream, "Cubeb loopback output only",
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NULL, NULL, NULL, &output_params, latency_frames,
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is_float ? data_cb_playback<float> : data_cb_playback<short>,
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state_cb_loop, user_data.get());
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ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";
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std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
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cleanup_output_stream_at_exit(output_stream, cubeb_stream_destroy);
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cubeb_stream_start(input_stream);
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cubeb_stream_start(output_stream);
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delay(300);
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cubeb_stream_stop(output_stream);
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cubeb_stream_stop(input_stream);
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/* access after stop should not happen, but lock just in case and to appease sanitization tools */
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std::lock_guard<std::mutex> lock(user_data->user_state_mutex);
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std::vector<double> & output_frames = user_data->output_frames;
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std::vector<double> & input_frames = user_data->input_frames;
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ASSERT_LE(output_frames.size(), input_frames.size())
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<< "#Output frames should be less or equal to #input frames";
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size_t phase = find_phase(user_data->output_frames, user_data->input_frames, NUM_FRAMES_TO_OUTPUT);
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/* extract vectors of just the relevant signal from output and input */
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auto output_frames_signal_start = output_frames.begin();
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auto output_frames_signal_end = output_frames.begin() + NUM_FRAMES_TO_OUTPUT;
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std::vector<double> trimmed_output_frames(output_frames_signal_start, output_frames_signal_end);
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auto input_frames_signal_start = input_frames.begin() + phase;
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auto input_frames_signal_end = input_frames.begin() + phase + NUM_FRAMES_TO_OUTPUT;
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std::vector<double> trimmed_input_frames(input_frames_signal_start, input_frames_signal_end);
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compare_signals(trimmed_output_frames, trimmed_input_frames);
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}
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TEST(cubeb, loopback_separate_streams)
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{
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run_loopback_separate_streams_test(true);
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run_loopback_separate_streams_test(false);
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}
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void run_loopback_silence_test(bool is_float)
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{
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cubeb * ctx;
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cubeb_stream * input_stream;
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cubeb_stream_params input_params;
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int r;
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uint32_t latency_frames = 0;
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r = common_init(&ctx, "Cubeb loopback example: record silence");
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ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";
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std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
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cleanup_cubeb_at_exit(ctx, cubeb_destroy);
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input_params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16LE;
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input_params.rate = SAMPLE_FREQUENCY;
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input_params.channels = 1;
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input_params.layout = CUBEB_LAYOUT_MONO;
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input_params.prefs = CUBEB_STREAM_PREF_LOOPBACK;
|
|
|
|
std::unique_ptr<user_state_loopback> user_data(new user_state_loopback());
|
|
ASSERT_TRUE(!!user_data) << "Error allocating user data";
|
|
|
|
r = cubeb_get_min_latency(ctx, &input_params, &latency_frames);
|
|
ASSERT_EQ(r, CUBEB_OK) << "Could not get minimal latency";
|
|
|
|
/* setup an input stream with loopback */
|
|
r = cubeb_stream_init(ctx, &input_stream, "Cubeb loopback input only",
|
|
NULL, &input_params, NULL, NULL, latency_frames,
|
|
is_float ? data_cb_loop_input_only<float> : data_cb_loop_input_only<short>,
|
|
state_cb_loop, user_data.get());
|
|
ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";
|
|
|
|
std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
|
|
cleanup_input_stream_at_exit(input_stream, cubeb_stream_destroy);
|
|
|
|
cubeb_stream_start(input_stream);
|
|
delay(300);
|
|
cubeb_stream_stop(input_stream);
|
|
|
|
/* access after stop should not happen, but lock just in case and to appease sanitization tools */
|
|
std::lock_guard<std::mutex> lock(user_data->user_state_mutex);
|
|
std::vector<double> & input_frames = user_data->input_frames;
|
|
|
|
/* expect to have at least ~50ms of frames */
|
|
ASSERT_GE(input_frames.size(), SAMPLE_FREQUENCY / 20);
|
|
double EPISILON = 0.0001;
|
|
/* frames should be 0.0, but use epsilon to avoid possible issues with impls
|
|
that may use ~0.0 silence values. */
|
|
for (double frame : input_frames) {
|
|
ASSERT_LT(abs(frame), EPISILON);
|
|
}
|
|
}
|
|
|
|
TEST(cubeb, loopback_silence)
|
|
{
|
|
run_loopback_silence_test(true);
|
|
run_loopback_silence_test(false);
|
|
}
|
|
|
|
void run_loopback_device_selection_test(bool is_float)
|
|
{
|
|
cubeb * ctx;
|
|
cubeb_device_collection collection;
|
|
cubeb_stream * input_stream;
|
|
cubeb_stream * output_stream;
|
|
cubeb_stream_params input_params;
|
|
cubeb_stream_params output_params;
|
|
int r;
|
|
uint32_t latency_frames = 0;
|
|
|
|
r = common_init(&ctx, "Cubeb loopback example: device selection, separate streams");
|
|
ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";
|
|
|
|
std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
|
|
cleanup_cubeb_at_exit(ctx, cubeb_destroy);
|
|
|
|
r = cubeb_enumerate_devices(ctx, CUBEB_DEVICE_TYPE_OUTPUT, &collection);
|
|
if (r == CUBEB_ERROR_NOT_SUPPORTED) {
|
|
fprintf(stderr, "Device enumeration not supported"
|
|
" for this backend, skipping this test.\n");
|
|
return;
|
|
}
|
|
|
|
ASSERT_EQ(r, CUBEB_OK) << "Error enumerating devices " << r;
|
|
/* get first preferred output device id */
|
|
std::string device_id;
|
|
for (size_t i = 0; i < collection.count; i++) {
|
|
if (collection.device[i].preferred) {
|
|
device_id = collection.device[i].device_id;
|
|
break;
|
|
}
|
|
}
|
|
cubeb_device_collection_destroy(ctx, &collection);
|
|
if (device_id.empty()) {
|
|
fprintf(stderr, "Could not find preferred device, aborting test.\n");
|
|
return;
|
|
}
|
|
|
|
input_params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16LE;
|
|
input_params.rate = SAMPLE_FREQUENCY;
|
|
input_params.channels = 1;
|
|
input_params.layout = CUBEB_LAYOUT_MONO;
|
|
input_params.prefs = CUBEB_STREAM_PREF_LOOPBACK;
|
|
output_params.format = is_float ? CUBEB_SAMPLE_FLOAT32NE : CUBEB_SAMPLE_S16LE;
|
|
output_params.rate = SAMPLE_FREQUENCY;
|
|
output_params.channels = 1;
|
|
output_params.layout = CUBEB_LAYOUT_MONO;
|
|
output_params.prefs = CUBEB_STREAM_PREF_NONE;
|
|
|
|
std::unique_ptr<user_state_loopback> user_data(new user_state_loopback());
|
|
ASSERT_TRUE(!!user_data) << "Error allocating user data";
|
|
|
|
r = cubeb_get_min_latency(ctx, &output_params, &latency_frames);
|
|
ASSERT_EQ(r, CUBEB_OK) << "Could not get minimal latency";
|
|
|
|
/* setup an input stream with loopback */
|
|
r = cubeb_stream_init(ctx, &input_stream, "Cubeb loopback input only",
|
|
device_id.c_str(), &input_params, NULL, NULL, latency_frames,
|
|
is_float ? data_cb_loop_input_only<float> : data_cb_loop_input_only<short>,
|
|
state_cb_loop, user_data.get());
|
|
ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";
|
|
|
|
std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
|
|
cleanup_input_stream_at_exit(input_stream, cubeb_stream_destroy);
|
|
|
|
/* setup an output stream */
|
|
r = cubeb_stream_init(ctx, &output_stream, "Cubeb loopback output only",
|
|
NULL, NULL, device_id.c_str(), &output_params, latency_frames,
|
|
is_float ? data_cb_playback<float> : data_cb_playback<short>,
|
|
state_cb_loop, user_data.get());
|
|
ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";
|
|
|
|
std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
|
|
cleanup_output_stream_at_exit(output_stream, cubeb_stream_destroy);
|
|
|
|
cubeb_stream_start(input_stream);
|
|
cubeb_stream_start(output_stream);
|
|
delay(300);
|
|
cubeb_stream_stop(output_stream);
|
|
cubeb_stream_stop(input_stream);
|
|
|
|
/* access after stop should not happen, but lock just in case and to appease sanitization tools */
|
|
std::lock_guard<std::mutex> lock(user_data->user_state_mutex);
|
|
std::vector<double> & output_frames = user_data->output_frames;
|
|
std::vector<double> & input_frames = user_data->input_frames;
|
|
ASSERT_LE(output_frames.size(), input_frames.size())
|
|
<< "#Output frames should be less or equal to #input frames";
|
|
|
|
size_t phase = find_phase(user_data->output_frames, user_data->input_frames, NUM_FRAMES_TO_OUTPUT);
|
|
|
|
/* extract vectors of just the relevant signal from output and input */
|
|
auto output_frames_signal_start = output_frames.begin();
|
|
auto output_frames_signal_end = output_frames.begin() + NUM_FRAMES_TO_OUTPUT;
|
|
std::vector<double> trimmed_output_frames(output_frames_signal_start, output_frames_signal_end);
|
|
auto input_frames_signal_start = input_frames.begin() + phase;
|
|
auto input_frames_signal_end = input_frames.begin() + phase + NUM_FRAMES_TO_OUTPUT;
|
|
std::vector<double> trimmed_input_frames(input_frames_signal_start, input_frames_signal_end);
|
|
|
|
compare_signals(trimmed_output_frames, trimmed_input_frames);
|
|
}
|
|
|
|
TEST(cubeb, loopback_device_selection)
|
|
{
|
|
run_loopback_device_selection_test(true);
|
|
run_loopback_device_selection_test(false);
|
|
}
|