audio_coding: remove "main" directory

webrtc/modules/audio_coding/main/acm2/acm_resampler.cc

-/*
- *  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/acm2/acm_resampler.h"
-
-#include <assert.h>
-#include <string.h>
-
-#include "webrtc/common_audio/resampler/include/resampler.h"
-#include "webrtc/system_wrappers/include/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,
-                                 int num_audio_channels,
-                                 size_t out_capacity_samples,
-                                 int16_t* out_audio) {
-  size_t in_length = static_cast<size_t>(in_freq_hz * num_audio_channels / 100);
-  int out_length = out_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) {
-    LOG_FERR3(LS_ERROR, InitializeIfNeeded, in_freq_hz, out_freq_hz,
-              num_audio_channels);
-    return -1;
-  }
-
-  out_length =
-      resampler_.Resample(in_audio, in_length, out_audio, out_capacity_samples);
-  if (out_length == -1) {
-    LOG_FERR4(LS_ERROR,
-              Resample,
-              in_audio,
-              in_length,
-              out_audio,
-              out_capacity_samples);
-    return -1;
-  }
-
-  return out_length / num_audio_channels;
-}
-
-}  // namespace acm2
-}  // namespace webrtc