1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "webrtc/modules/audio_coding/main/acm2/acm_resampler.h" 12 13 #include <assert.h> 14 #include <string.h> 15 16 #include "webrtc/common_audio/resampler/include/resampler.h" 17 #include "webrtc/system_wrappers/interface/logging.h" 18 19 namespace webrtc { 20 namespace acm2 { 21 22 ACMResampler::ACMResampler() { 23 } 24 25 ACMResampler::~ACMResampler() { 26 } 27 28 int ACMResampler::Resample10Msec(const int16_t* in_audio, 29 int in_freq_hz, 30 int out_freq_hz, 31 int num_audio_channels, 32 int out_capacity_samples, 33 int16_t* out_audio) { 34 int in_length = in_freq_hz * num_audio_channels / 100; 35 int out_length = out_freq_hz * num_audio_channels / 100; 36 if (in_freq_hz == out_freq_hz) { 37 if (out_capacity_samples < in_length) { 38 assert(false); 39 return -1; 40 } 41 memcpy(out_audio, in_audio, in_length * sizeof(int16_t)); 42 return in_length / num_audio_channels; 43 } 44 45 if (resampler_.InitializeIfNeeded(in_freq_hz, out_freq_hz, 46 num_audio_channels) != 0) { 47 LOG_FERR3(LS_ERROR, InitializeIfNeeded, in_freq_hz, out_freq_hz, 48 num_audio_channels); 49 return -1; 50 } 51 52 out_length = 53 resampler_.Resample(in_audio, in_length, out_audio, out_capacity_samples); 54 if (out_length == -1) { 55 LOG_FERR4(LS_ERROR, 56 Resample, 57 in_audio, 58 in_length, 59 out_audio, 60 out_capacity_samples); 61 return -1; 62 } 63 64 return out_length / num_audio_channels; 65 } 66 67 } // namespace acm2 68 } // namespace webrtc 69
