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/*
* Copyright (c) 2016 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 "modules/audio_processing/test/bitexactness_tools.h"
#include <math.h>
#include <algorithm>
#include <string>
#include <vector>
#include "api/array_view.h"
#include "test/testsupport/file_utils.h"
namespace webrtc {
namespace test {
std::string GetApmRenderTestVectorFileName(int sample_rate_hz) {
switch (sample_rate_hz) {
case 8000:
return ResourcePath("far8_stereo", "pcm");
case 16000:
return ResourcePath("far16_stereo", "pcm");
case 32000:
return ResourcePath("far32_stereo", "pcm");
case 48000:
return ResourcePath("far48_stereo", "pcm");
default:
RTC_DCHECK_NOTREACHED();
}
return "";
}
std::string GetApmCaptureTestVectorFileName(int sample_rate_hz) {
switch (sample_rate_hz) {
case 8000:
return ResourcePath("near8_stereo", "pcm");
case 16000:
return ResourcePath("near16_stereo", "pcm");
case 32000:
return ResourcePath("near32_stereo", "pcm");
case 48000:
return ResourcePath("near48_stereo", "pcm");
default:
RTC_DCHECK_NOTREACHED();
}
return "";
}
void ReadFloatSamplesFromStereoFile(size_t samples_per_channel,
size_t num_channels,
InputAudioFile* stereo_pcm_file,
rtc::ArrayView<float> data) {
RTC_DCHECK_LE(num_channels, 2);
RTC_DCHECK_EQ(data.size(), samples_per_channel * num_channels);
std::vector<int16_t> read_samples(samples_per_channel * 2);
stereo_pcm_file->Read(samples_per_channel * 2, read_samples.data());
// Convert samples to float and discard any channels not needed.
for (size_t sample = 0; sample < samples_per_channel; ++sample) {
for (size_t channel = 0; channel < num_channels; ++channel) {
data[sample * num_channels + channel] =
read_samples[sample * 2 + channel] / 32768.0f;
}
}
}
::testing::AssertionResult VerifyDeinterleavedArray(
size_t samples_per_channel,
size_t num_channels,
rtc::ArrayView<const float> reference,
rtc::ArrayView<const float> output,
float element_error_bound) {
// Form vectors to compare the reference to. Only the first values of the
// outputs are compared in order not having to specify all preceeding frames
// as testvectors.
const size_t reference_frame_length =
rtc::CheckedDivExact(reference.size(), num_channels);
std::vector<float> output_to_verify;
for (size_t channel_no = 0; channel_no < num_channels; ++channel_no) {
output_to_verify.insert(output_to_verify.end(),
output.begin() + channel_no * samples_per_channel,
output.begin() + channel_no * samples_per_channel +
reference_frame_length);
}
return VerifyArray(reference, output_to_verify, element_error_bound);
}
::testing::AssertionResult VerifyArray(rtc::ArrayView<const float> reference,
rtc::ArrayView<const float> output,
float element_error_bound) {
// The vectors are deemed to be bitexact only if
// a) output have a size at least as long as the reference.
// b) the samples in the reference are bitexact with the corresponding samples
// in the output.
bool equal = true;
if (output.size() < reference.size()) {
equal = false;
} else {
// Compare the first samples in the vectors.
for (size_t k = 0; k < reference.size(); ++k) {
if (fabs(output[k] - reference[k]) > element_error_bound) {
equal = false;
break;
}
}
}
if (equal) {
return ::testing::AssertionSuccess();
}
// Lambda function that produces a formatted string with the data in the
// vector.
auto print_vector_in_c_format = [](rtc::ArrayView<const float> v,
size_t num_values_to_print) {
std::string s = "{ ";
for (size_t k = 0; k < std::min(num_values_to_print, v.size()); ++k) {
s += std::to_string(v[k]) + "f";
s += (k < (num_values_to_print - 1)) ? ", " : "";
}
return s + " }";
};
// If the vectors are deemed not to be similar, return a report of the
// difference.
return ::testing::AssertionFailure()
<< std::endl
<< " Actual values : "
<< print_vector_in_c_format(output,
std::min(output.size(), reference.size()))
<< std::endl
<< " Expected values: "
<< print_vector_in_c_format(reference, reference.size()) << std::endl;
}
} // namespace test
} // namespace webrtc
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