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/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/include/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 size_t num_audio_channels, 32 size_t out_capacity_samples, 33 int16_t* out_audio) { 34 size_t in_length = in_freq_hz * num_audio_channels / 100; 35 if (in_freq_hz == out_freq_hz) { 36 if (out_capacity_samples < in_length) { 37 assert(false); 38 return -1; 39 } 40 memcpy(out_audio, in_audio, in_length * sizeof(int16_t)); 41 return static_cast<int>(in_length / num_audio_channels); 42 } 43 44 if (resampler_.InitializeIfNeeded(in_freq_hz, out_freq_hz, 45 num_audio_channels) != 0) { 46 LOG(LS_ERROR) << "InitializeIfNeeded(" << in_freq_hz << ", " << out_freq_hz 47 << ", " << num_audio_channels << ") failed."; 48 return -1; 49 } 50 51 int out_length = 52 resampler_.Resample(in_audio, in_length, out_audio, out_capacity_samples); 53 if (out_length == -1) { 54 LOG(LS_ERROR) << "Resample(" << in_audio << ", " << in_length << ", " 55 << out_audio << ", " << out_capacity_samples << ") failed."; 56 return -1; 57 } 58 59 return static_cast<int>(out_length / num_audio_channels); 60 } 61 62 } // namespace acm2 63 } // namespace webrtc 64
