blob: 50ddab1d8b99157f9a2cbe7c8234acda10115b88 [file] [log] [blame]
/*
* 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 "webrtc/modules/audio_coding/main/source/acm_resampler.h"
#include <string.h>
#include "webrtc/common_audio/resampler/include/push_resampler.h"
#include "webrtc/system_wrappers/interface/logging.h"
namespace webrtc {
namespace acm1 {
ACMResampler::ACMResampler() {
}
ACMResampler::~ACMResampler() {
}
int16_t ACMResampler::Resample10Msec(const int16_t* in_audio,
int32_t in_freq_hz,
int16_t* out_audio,
int32_t out_freq_hz,
uint8_t num_audio_channels) {
if (in_freq_hz == out_freq_hz) {
size_t length = static_cast<size_t>(in_freq_hz * num_audio_channels / 100);
memcpy(out_audio, in_audio, length * sizeof(int16_t));
return static_cast<int16_t>(in_freq_hz / 100);
}
// |max_length| is the maximum number of samples for 10ms at 48kHz.
// TODO(turajs): is this actually the capacity of the |out_audio| buffer?
int max_length = 480 * num_audio_channels;
int in_length = in_freq_hz / 100 * num_audio_channels;
if (resampler_.InitializeIfNeeded(in_freq_hz, out_freq_hz,
num_audio_channels) != 0) {
LOG_FERR3(LS_ERROR, InitializeIfNeeded, in_freq_hz, out_freq_hz,
num_audio_channels);
return -1;
}
int out_length = resampler_.Resample(in_audio, in_length, out_audio,
max_length);
if (out_length == -1) {
LOG_FERR4(LS_ERROR, Resample, in_audio, in_length, out_audio, max_length);
return -1;
}
return out_length / num_audio_channels;
}
} // namespace acm1
} // namespace webrtc