| /* |
| * 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 |