blob: 4eecae4b70622f8979a8777fa8b16818a218dc0f [file] [log] [blame]
* Copyright (c) 2013 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.
namespace webrtc {
const int kDefaultSampleRate = 44100;
const int kNumChannels = 1;
// Number of bytes per audio frame.
// Example: 16-bit PCM in mono => 1*(16/8)=2 [bytes/frame]
const size_t kBytesPerFrame = kNumChannels * (16 / 8);
// Delay estimates for the two different supported modes. These values are based
// on real-time round-trip delay estimates on a large set of devices and they
// are lower bounds since the filter length is 128 ms, so the AEC works for
// delays in the range [50, ~170] ms and [150, ~270] ms. Note that, in most
// cases, the lowest delay estimate will not be utilized since devices that
// support low-latency output audio often supports HW AEC as well.
const int kLowLatencyModeDelayEstimateInMilliseconds = 50;
const int kHighLatencyModeDelayEstimateInMilliseconds = 150;
} // namespace webrtc