| # Copyright (c) 2017 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. |
| |
| """Echo path simulation factory module. |
| """ |
| |
| import numpy as np |
| |
| from . import echo_path_simulation |
| |
| |
| class EchoPathSimulatorFactory(object): |
| |
| # TODO(alessiob): Replace 5 ms delay (at 48 kHz sample rate) with a more |
| # realistic impulse response. |
| _LINEAR_ECHO_IMPULSE_RESPONSE = np.array([0.0]*(5 * 48) + [0.15]) |
| |
| def __init__(self): |
| pass |
| |
| @classmethod |
| def GetInstance(cls, echo_path_simulator_class, render_input_filepath): |
| """Creates an EchoPathSimulator instance given a class object. |
| |
| Args: |
| echo_path_simulator_class: EchoPathSimulator class object (not an |
| instance). |
| render_input_filepath: Path to the render audio track file. |
| |
| Returns: |
| An EchoPathSimulator instance. |
| """ |
| assert render_input_filepath is not None or ( |
| echo_path_simulator_class == echo_path_simulation.NoEchoPathSimulator) |
| |
| if echo_path_simulator_class == echo_path_simulation.NoEchoPathSimulator: |
| return echo_path_simulation.NoEchoPathSimulator() |
| elif echo_path_simulator_class == ( |
| echo_path_simulation.LinearEchoPathSimulator): |
| return echo_path_simulation.LinearEchoPathSimulator( |
| render_input_filepath, cls._LINEAR_ECHO_IMPULSE_RESPONSE) |
| else: |
| return echo_path_simulator_class(render_input_filepath) |
