63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
/*
|
|
* 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 "modules/audio_coding/acm2/acm_resampler.h"
|
|
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
#include "rtc_base/logging.h"
|
|
|
|
namespace webrtc {
|
|
namespace acm2 {
|
|
|
|
ACMResampler::ACMResampler() {}
|
|
|
|
ACMResampler::~ACMResampler() {}
|
|
|
|
int ACMResampler::Resample10Msec(const int16_t* in_audio,
|
|
int in_freq_hz,
|
|
int out_freq_hz,
|
|
size_t num_audio_channels,
|
|
size_t out_capacity_samples,
|
|
int16_t* out_audio) {
|
|
size_t in_length = in_freq_hz * num_audio_channels / 100;
|
|
if (in_freq_hz == out_freq_hz) {
|
|
if (out_capacity_samples < in_length) {
|
|
assert(false);
|
|
return -1;
|
|
}
|
|
memcpy(out_audio, in_audio, in_length * sizeof(int16_t));
|
|
return static_cast<int>(in_length / num_audio_channels);
|
|
}
|
|
|
|
if (resampler_.InitializeIfNeeded(in_freq_hz, out_freq_hz,
|
|
num_audio_channels) != 0) {
|
|
RTC_LOG(LS_ERROR) << "InitializeIfNeeded(" << in_freq_hz << ", "
|
|
<< out_freq_hz << ", " << num_audio_channels
|
|
<< ") failed.";
|
|
return -1;
|
|
}
|
|
|
|
int out_length =
|
|
resampler_.Resample(in_audio, in_length, out_audio, out_capacity_samples);
|
|
if (out_length == -1) {
|
|
RTC_LOG(LS_ERROR) << "Resample(" << in_audio << ", " << in_length << ", "
|
|
<< out_audio << ", " << out_capacity_samples
|
|
<< ") failed.";
|
|
return -1;
|
|
}
|
|
|
|
return static_cast<int>(out_length / num_audio_channels);
|
|
}
|
|
|
|
} // namespace acm2
|
|
} // namespace webrtc
|