├── LICENSE ├── README.md ├── cardioid.txt ├── data.wav ├── example_1.py ├── olafilt.py ├── omnidirectional.txt ├── roomsimove_single.py └── utils.py /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2019 Sunit Sivasankaran 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Python RIR Simulator 2 | Room impulse response simulator using python 3 | 4 | Copyright 2003 Douglas R. Campbell 5 | 6 | Copyright 2008-2016 Emmanuel Vincent 7 | 8 | Copyright 2017 Sunit Sivasankaran 9 | 10 | This software is a python version of the stripped-down version of the Roomsim toolbox version 3.3 by Douglas R. Campbell. 11 | The matlab function for the stripped down version as well as RIR generation for moving sources can be found here: 12 | Roomsimove, https://www.irisa.fr/metiss/members/evincent/Roomsimove.zip 13 | 14 | If you find the code useful, please cite the following reference: 15 | Room Impulse Response Generator, https://github.com/sunits/rir_simulator_python 16 | 17 | 18 | One difference between the matlab version and this code is that 19 | RT60 value is assumed to be same for all frequencies. 20 | 21 | Tested for sampling rate of 16000 Hz. 22 | 23 | ## Usage: 24 | 25 | ### Generate random Room Impulse Responses 26 | import roomsimove_single 27 | # Create an interface. RIRs are not yet generated 28 | rir_if = roomsimove_single.RandomRIR(sampling_rate=16000) 29 | # Supports multiple sources. Each source is placed in a random position inside the same room. 30 | src = [np.random.rand(10000), np.random.rand(10000)] 31 | # Support multiple microphones. Position of each device is also random. 32 | # Minimum distance between each element (mics or sources) is 0.5 meters 33 | rev_sig = rir_if.reverberate(src, mic_cnt=2) 34 | # rev_sig contains a list of reverberate sources. 35 | # Each element in the list is of dimension [src_len x mic_cnt] 36 | 37 | 38 | ### As standalone file: 39 | python roomsimove_single.py config_file source_pos_x source_pos_y source_pos_z output_file 40 | 41 | The help options will also give the details 42 | python roomsimove_single.py -h 43 | 44 | ### As a module: 45 | using config_file 46 | ----------------- 47 | import roomsimove_single 48 | sim_rir = roomsimove_single.RoomSim.init_from_config_file(config_file) 49 | source_pos = [1, 1, 1] 50 | rir = sim_rir.create_rir(source_pos) 51 | 52 | using default values of absorption coeffecients 53 | ----------------------------------------------- 54 | import roomsimove_single 55 | room_dim = [4.2, 3.4, 5.2] 56 | room = roomsimove_single.Room(room_dim) 57 | mic_pos = [2, 2, 2] 58 | mic1 = roomsimove_single.Microphone(mic_pos, 1, \ 59 | orientation=[0.0, 0.0, 0.0], direction='omnidirectional'): 60 | mic_pos = [2, 2, 1] 61 | mic2 = roomsimove_single.Microphone(mic_pos, 2, \ 62 | orientation=[0.0, 0.0, 0.0], direction='cardioid'): 63 | mics = [mic1, mic2] 64 | sample_rate = 16000 65 | sim_rir = roomsimove_single.RoomSim(sample_rate, room, mics, RT60=0.3) 66 | source_pos = [1, 1, 1] 67 | rir = sim_rir.create_rir(source_pos) 68 | 69 | # Applying RIR to data 70 | import fftfilt 71 | import soundfile as sf 72 | # Assuming single channel data 73 | [data, fs] = sf.read(wav_file) 74 | reverb_data = fftfilt.fftfilt(rir,data) 75 | 76 | 77 | 78 | 79 | 80 | -------------------------------------------------------------------------------- /data.wav: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sunits/rir_simulator_python/968edd99d93d45655655e30baa73fe9e827364cc/data.wav -------------------------------------------------------------------------------- /example_1.py: -------------------------------------------------------------------------------- 1 | import roomsimove_single 2 | import ipdb 3 | import soundfile as sf 4 | import olafilt 5 | import numpy as np 6 | import ipdb 7 | 8 | ## To generate random rirs and convolve with signals 9 | ipdb.set_trace() 10 | rir_if = roomsimove_single.RandomRIR(sampling_rate=16000) 11 | src = [np.random.rand(10000), np.random.rand(10000)] 12 | rev_sig = rir_if.reverberate(src, mic_cnt=2) 13 | 14 | 15 | 16 | rt60 = 0.4 # in seconds 17 | room_dim = [4.2, 3.4, 5.2] # in meters 18 | mic_pos1 = [2, 2, 2] # in meters 19 | mic_pos2 = [2, 2, 1] # in meters 20 | source_pos = [1, 1, 1] # in meters 21 | sampling_rate = 16000 22 | 23 | mic_positions = [mic_pos1, mic_pos2] 24 | rir = roomsimove_single.do_everything(room_dim, mic_positions, source_pos, rt60) 25 | 26 | ## Alternative method for more control 27 | # absorption = roomsimove_single.rt60_to_absorption(room_dim, rt60) 28 | # room = roomsimove_single.Room(room_dim, abs_coeff=absorption) 29 | # mic1 = roomsimove_single.Microphone(mic_pos1, 1, \ 30 | # orientation=[0.0, 0.0, 0.0], direction='omnidirectional') 31 | # mic2 = roomsimove_single.Microphone(mic_pos2, 2, \ 32 | # orientation=[0.0, 0.0, 0.0], direction='cardioid') 33 | # mics = [mic1, mic2] 34 | # sim_rir = roomsimove_single.RoomSim(sampling_rate, room, mics, RT60=rt60) 35 | # rir = sim_rir.create_rir(source_pos) 36 | ipdb.set_trace() 37 | 38 | [data, fs] = sf.read('data.wav',always_2d=True) 39 | data = data[:,0] 40 | data_rev_ch1 = olafilt.olafilt(rir[:,0], data) 41 | data_rev_ch2 = olafilt.olafilt(rir[:,1], data) 42 | data_rev = np.array([data_rev_ch1, data_rev_ch2]) 43 | sf.write('data_rev.wav', data_rev.T, fs) 44 | 45 | 46 | -------------------------------------------------------------------------------- /olafilt.py: -------------------------------------------------------------------------------- 1 | # 2 | # Overlap-add FIR filter, (c) Joachim Thiemann 2016 3 | # LICENCE: MIT 4 | # 5 | import numpy as np 6 | 7 | def olafilt(b, x, zi=None): 8 | """ 9 | Filter a one-dimensional array with an FIR filter 10 | 11 | Filter a data sequence, `x`, using a FIR filter given in `b`. 12 | Filtering uses the overlap-add method converting both `x` and `b` 13 | into frequency domain first. The FFT size is determined as the 14 | next higher power of 2 of twice the length of `b`. 15 | 16 | Parameters 17 | ---------- 18 | b : one-dimensional numpy array 19 | The impulse response of the filter 20 | x : one-dimensional numpy array 21 | Signal to be filtered 22 | zi : one-dimensional numpy array, optional 23 | Initial condition of the filter, but in reality just the 24 | runout of the previous computation. If `zi` is None or not 25 | given, then zero initial state is assumed. 26 | 27 | Returns 28 | ------- 29 | y : array 30 | The output of the digital filter. 31 | zf : array, optional 32 | If `zi` is None, this is not returned, otherwise, `zf` holds the 33 | final filter delay values. 34 | """ 35 | 36 | L_I = b.shape[0] 37 | # Find power of 2 larger that 2*L_I (from abarnert on Stackoverflow) 38 | L_F = 2<<(L_I-1).bit_length() 39 | L_S = L_F - L_I + 1 40 | L_sig = x.shape[0] 41 | offsets = range(0, L_sig, L_S) 42 | 43 | # blockwise frequency domain multiplication 44 | if np.iscomplexobj(b) or np.iscomplexobj(x): 45 | FDir = np.fft.fft(b, n=L_F) 46 | tempresult = [np.fft.ifft(np.fft.fft(x[n:n+L_S], n=L_F)*FDir) 47 | for n in offsets] 48 | res = np.zeros(L_sig+L_F, dtype=np.complex128) 49 | else: 50 | FDir = np.fft.rfft(b, n=L_F) 51 | tempresult = [np.fft.irfft(np.fft.rfft(x[n:n+L_S], n=L_F)*FDir) 52 | for n in offsets] 53 | res = np.zeros(L_sig+L_F) 54 | 55 | # overlap and add 56 | for i, n in enumerate(offsets): 57 | res[n:n+L_F] += tempresult[i] 58 | 59 | if zi is not None: 60 | res[:zi.shape[0]] = res[:zi.shape[0]] + zi 61 | return res[:L_sig], res[L_sig:] 62 | else: 63 | return res[:L_sig] 64 | -------------------------------------------------------------------------------- /omnidirectional.txt: -------------------------------------------------------------------------------- 1 | 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 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1 1 1 1 1 1 1 1 182 | -------------------------------------------------------------------------------- /roomsimove_single.py: -------------------------------------------------------------------------------- 1 | ''' 2 | ROOMSIMOVE_SINGLE Compute shoebox room filters for a single source 3 | ########################################################################### 4 | # Copyright 2003 Douglas R. Campbell 5 | # Copyright 2008-2016 Emmanuel Vincent 6 | # Copyright 2017 Sunit Sivasankaran 7 | # This software is a python version of the stripped-down version of the Roomsim toolbox version 8 | # 3.3 by Douglas R. Campbell , 9 | # The matlab function for the stripped down version can be found here: 10 | Roomsimove, http://homepages.loria.fr/evincent/software/Roomsimove.zip 11 | # This code is distributed under the terms of the GNU Public License version 3 12 | # (http://www.gnu.org/licenses/gpl.txt) 13 | # 14 | # If you find it useful, please cite the following reference: 15 | ########################################################################### 16 | One difference between the matlab version and this code is that 17 | RT60 value is assumed to be same for all frequencies. 18 | 19 | Tested for sampling rate of 16000 Hz. 20 | 21 | Usage: 22 | ========= 23 | 24 | As standalone file: 25 | ------------------ 26 | python roomsimove_single.py config_file source_pos_x source_pos_y source_pos_z output_file 27 | 28 | The help options will also give the details 29 | python roomsimove_single.py -h 30 | 31 | As a module: 32 | ------------ 33 | using config_file 34 | ----------------- 35 | import roomsimove_single 36 | sim_rir = roomsimove_single.RoomSim.init_from_config_file(config_file) 37 | source_pos = [1, 1, 1] 38 | rir = sim_rir.create_rir(source_pos) 39 | 40 | using default values of absorption coeffecients 41 | ----------------------------------------------- 42 | import roomsimove_single 43 | rt60 = 0.5 # in seconds 44 | room_dim = [4.2, 3.4, 5.2] # in meters 45 | absorption = roomsimove_single.rt60_to_absorption(room_dim, rt60) 46 | room = roomsimove_single.Room(room_dim, abs_coeff=absorption) 47 | mic_pos = [2, 2, 2] # in meters 48 | mic1 = roomsimove_single.Microphone(mic_pos, 1, \ 49 | orientation=[0.0, 0.0, 0.0], direction='omnidirectional') 50 | mic_pos = [2, 2, 1] # in meters 51 | mic2 = roomsimove_single.Microphone(mic_pos, 2, \ 52 | orientation=[0.0, 0.0, 0.0], direction='cardioid') 53 | mics = [mic1, mic2] 54 | sampling_rate = 16000 55 | sim_rir = roomsimove_single.RoomSim(sampling_rate, room, mics, RT60=rt60) 56 | source_pos = [1, 1, 1] # in meters 57 | rir = sim_rir.create_rir(source_pos) 58 | 59 | Appyling RIR to data 60 | ------------------- 61 | import olafilt 62 | import sounfile as sf 63 | # Assuming single channel data 64 | [data, fs] = sf.read(wav_file) 65 | reverb_data = olafilt.olafilt(rir,data) 66 | ''' 67 | 68 | import argparse 69 | import numpy as np 70 | from scipy.interpolate import interp1d 71 | import scipy.signal as scipy_sig 72 | import olafilt 73 | import utils 74 | 75 | 76 | 77 | class RandomRIR(object): 78 | """ 79 | Generate a random room, microphone and source position and generate the corresponding RIR. 80 | 81 | # Arguments 82 | sampling_rate: Sampling rate of the RIR 83 | max_rt_60: Maximum value of RT60 in seconds. Actual RT60 is random between [0.1, max_rt_60] 84 | min_room_di, max_room_dim: Min and Maximum value of the room dim. 85 | Room dimensions are random picks between [min_room_dim, max_room_dim] 86 | 87 | # Usage 88 | rir_if = RandomRIR(sampling_rate=16000) 89 | src = [np.random.rand(10000), np.random.rand(10000)] 90 | rev_sig = rir_if.reverberate(src) 91 | 92 | """ 93 | def __init__(self, sampling_rate, max_rt_60=0.5, min_room_dim=3, max_room_dim=5): 94 | self.sampling_rate = sampling_rate 95 | self.max_rt_60 = max_rt_60 96 | self.max_room_dim = max_room_dim 97 | self.min_room_dim = min_room_dim 98 | 99 | def create_rir(self, src_cnt, mic_cnt=1): 100 | room_dim = utils.create_new_room(self.min_room_dim, self.max_room_dim) 101 | room = Room(room_dim.dim) 102 | rt60 = utils.generate_rt60(0.1, self.max_rt_60) 103 | all_ele = [] 104 | all_mics = [] 105 | for mic_id in np.arange(mic_cnt): 106 | mic_pos = utils.new_element_pos(room_dim, all_ele) 107 | mic = Microphone(mic_pos.dim, 2, \ 108 | orientation=[0.0, 0.0, 0.0], direction='cardioid') 109 | all_mics.append(mic) 110 | all_ele.append(mic_pos) 111 | all_srcs = [] 112 | for mic_id in np.arange(src_cnt): 113 | src_pos = utils.new_element_pos(room_dim, all_ele) 114 | all_srcs.append(src_pos) 115 | all_ele.append(src_pos) 116 | all_rir = [] 117 | sim_rir = RoomSim(self.sampling_rate, room, all_mics, RT60=rt60) 118 | for src in all_srcs: 119 | rir = sim_rir.create_rir(src.dim) 120 | all_rir.append(rir) 121 | return all_rir 122 | 123 | def reverberate(self, src_list, mic_cnt=1): 124 | """ 125 | Create the RIR with random values and convolves with sources 126 | # Arguments: 127 | src_list: wav signals for different sources 128 | mic_cnt: Number of micrphones 129 | 130 | # Returns a list of reverberate sources. Each element in the list \ 131 | is of dimension [src_len x mic_cnt] 132 | """ 133 | src_cnt = len(src_list) 134 | rirs = self.create_rir(src_cnt, mic_cnt=mic_cnt) 135 | rev_sig = [] 136 | for src_idx, src_rir in enumerate(rirs): 137 | src_ch = [] # multiple channels 138 | for mic_src_rir in src_rir.T: 139 | data_rev = olafilt.olafilt(mic_src_rir, src_list[src_idx]) 140 | src_ch.append(data_rev) 141 | src_ch = np.stack(src_ch, 1) 142 | rev_sig.append(src_ch) 143 | return rev_sig 144 | 145 | 146 | def do_everything(room_dim, mic_positions, source_pos, rt60): 147 | absorption = rt60_to_absorption(room_dim, rt60) 148 | room = Room(room_dim, abs_coeff=absorption) 149 | mics = [] 150 | for idx, mic in enumerate(mic_positions): 151 | temp_mic = Microphone(mic, idx, \ 152 | orientation=[0.0, 0.0, 0.0], direction='omnidirectional') 153 | mics.append(temp_mic) 154 | sim_rir = RoomSim(16000, room, mics, RT60=rt60) 155 | rir = sim_rir.create_rir(source_pos) 156 | return rir 157 | 158 | def get_rt60(F_abs, room_size, A): 159 | ''' 160 | Get RT 60 given the room characteristics 161 | ''' 162 | m_air = 6.875e-4*(F_abs.T/1000)**(1.7) 163 | # attenuation factors for one metre travelled in air 164 | room_size = np.array(room_size) 165 | atten_air = np.exp(-0.5*m_air).T 166 | Lx = room_size[0] 167 | Ly = room_size[1] 168 | Lz = room_size[2] 169 | #Volume of room m^3 170 | V_room=Lx*Ly*Lz 171 | area_xz=Lx*Lz 172 | area_yz=Ly*Lz 173 | area_xy=Lx*Ly 174 | total_area = 2*(area_xz+area_yz+area_xy)# Total area of shoebox room surfaces 175 | # Effective absorbing area of room surfaces at each frequency 176 | Se=area_yz*(A[0]+A[1])+area_xz*(A[2]+A[3])+area_xy*(A[5]+A[4]) 177 | a_bar=Se/total_area # Mean absorption of each room surface 178 | # Norris-Eyring estimate adjusted for air absorption 179 | RT60=0.1611*V_room/(4*m_air.T*V_room-total_area*np.log(1-a_bar)) 180 | return RT60 181 | 182 | def rt60_to_absorption(room_obj_dim, rt60): 183 | ''' 184 | Norris-Eyring formula %% 185 | Converts a given reverberation time into a single absorption coefficient for all surfaces 186 | ''' 187 | room_vol = np.prod(room_obj_dim) 188 | area_xz=room_obj_dim[0] * room_obj_dim[2] 189 | area_yz=room_obj_dim[1] * room_obj_dim[2] 190 | area_xy=room_obj_dim[0] * room_obj_dim[1] 191 | total_area =2*(area_xz+area_yz+area_xy); # Total area of shoebox room surfaces 192 | absorption = 1-np.exp(-0.1611*room_vol/(total_area*rt60)) 193 | return absorption 194 | 195 | class Microphone(object): 196 | ''' 197 | Deal with a single microphone 198 | ''' 199 | def __init__(self, pos, id_val, \ 200 | orientation=[0.0, 0.0, 0.0], direction='omnidirectional'): 201 | self.x_pos = pos[0] 202 | self.y_pos = pos[1] 203 | self.z_pos = pos[2] 204 | self.pos = pos 205 | self._id = str(id_val) 206 | self.orientation = orientation 207 | self.direction = direction 208 | 209 | class Room(object): 210 | ''' 211 | Room characteristics 212 | ''' 213 | def __init__(self, dim, F_abs=None, abs_coeff=None): 214 | self.x_val = dim[0] 215 | self.y_val = dim[1] 216 | self.z_val = dim[2] 217 | self.room_size = np.array(dim) 218 | self.freq_dep_absorption = {} 219 | if F_abs is None: 220 | self.freq_dep_absorption['F_abs'] = np.array([125, 250, 500, 1000, 2000, 4000, 8000]) 221 | else: 222 | self.freq_dep_absorption['F_abs'] = np.array(F_abs) 223 | if abs_coeff is None: 224 | self.__set_absorption() 225 | else: 226 | if isinstance(abs_coeff, float) or isinstance(abs_coeff, int): 227 | self.__set_absorption(abs_val=abs_coeff) 228 | else: 229 | self.freq_dep_absorption['Ax1'] = np.array(abs_coeff[0]) 230 | self.freq_dep_absorption['Ax2'] = np.array(abs_coeff[1]) 231 | self.freq_dep_absorption['Ay1'] = np.array(abs_coeff[2]) 232 | self.freq_dep_absorption['Ay2'] = np.array(abs_coeff[3]) 233 | self.freq_dep_absorption['Az1'] = np.array(abs_coeff[4]) 234 | self.freq_dep_absorption['Az2'] = np.array(abs_coeff[5]) 235 | 236 | def __set_absorption(self, abs_val=0.671): 237 | self.freq_dep_absorption['Ax1'] = np.array([abs_val] * len(self.freq_dep_absorption['F_abs'])) 238 | self.freq_dep_absorption['Ax2'] = np.array([abs_val] * len(self.freq_dep_absorption['F_abs'])) 239 | self.freq_dep_absorption['Ay1'] = np.array([abs_val] * len(self.freq_dep_absorption['F_abs'])) 240 | self.freq_dep_absorption['Ay2'] = np.array([abs_val] * len(self.freq_dep_absorption['F_abs'])) 241 | self.freq_dep_absorption['Az1'] = np.array([abs_val] * len(self.freq_dep_absorption['F_abs'])) 242 | self.freq_dep_absorption['Az2'] = np.array([abs_val] * len(self.freq_dep_absorption['F_abs'])) 243 | 244 | 245 | class Config(object): 246 | ''' 247 | Interface to read config files and put it to the right objects 248 | ''' 249 | def __init__(self, config_file): 250 | self._file = config_file 251 | self.config = {} 252 | with open(config_file) as fid: 253 | for line in fid: 254 | line = line.strip() 255 | if line.startswith('%') or line == '': 256 | # This is a comment. Ignore 257 | continue 258 | temp = line.split() 259 | try: 260 | self.config[temp[0]] = [float(temp_) for temp_ in temp[1:]] 261 | except: 262 | self.config[temp[0]] = [temp_ for temp_ in temp[1:]] 263 | self.config['Fs'] = int(self.config['Fs'][0]) 264 | dict_keys = self.config.keys() 265 | self.sp_keys = [ke for ke in dict_keys if ke.startswith('sp')] 266 | self.sd_keys = [ke for ke in dict_keys if ke.startswith('sd')] 267 | self.so_keys = [ke for ke in dict_keys if ke.startswith('so')] 268 | self.__verify_config() 269 | 270 | 271 | def __verify_config(self): 272 | assert 'room_size' in self.config, 'room_size not found in config' 273 | assert 'F_abs' in self.config, 'F_abs not found in config' 274 | assert 'Ax1' in self.config, 'Ax1 not found in config' 275 | assert 'Ax2' in self.config, 'Ax2 not found in config' 276 | assert 'Ay1' in self.config, 'Ay1 not found in config' 277 | assert 'Ay2' in self.config, 'Ay2 not found in config' 278 | assert 'Az1' in self.config, 'Az1 not found in config' 279 | assert 'Az2' in self.config, 'Az2 not found in config' 280 | assert 'sp1' in self.config, 'sp1 not found in config' 281 | assert 'sd1' in self.config, 'sd1 not found in config' 282 | assert 'so1' in self.config, 'so1 not found in config' 283 | assert len(self.sp_keys) == len(self.sd_keys) == len(self.so_keys), \ 284 | 'sp, sd and so are not of same length' 285 | 286 | def create_room_et_mic_objects(self): 287 | room_size = [float(_) for _ in self.config['room_size']] 288 | F_abs = [float(_) for _ in self.config['F_abs']] 289 | Ax1 = [float(_) for _ in self.config['Ax1']] 290 | Ax2 = [float(_) for _ in self.config['Ax2']] 291 | Ay1 = [float(_) for _ in self.config['Ay1']] 292 | Ay2 = [float(_) for _ in self.config['Ay2']] 293 | Az1 = [float(_) for _ in self.config['Az1']] 294 | Az2 = [float(_) for _ in self.config['Az2']] 295 | room = Room(room_size, F_abs, [Ax1, Ax2, Ay1, Ay2, Az1, Az2]) 296 | mics = [] 297 | for mic_idx in range(len(self.sp_keys)): 298 | mic_idx += 1 299 | _xp, _yp, _zp = self.config['sp'+str(mic_idx)] 300 | orientation = self.config['so'+str(mic_idx)] 301 | direction = self.config['sd'+str(mic_idx)][0].replace("'",'') 302 | mics.append(Microphone([_xp, _yp, _zp], mic_idx,\ 303 | orientation = orientation, direction = direction)) 304 | return[self.config['Fs'], room, mics] 305 | 306 | class RoomSim(object): 307 | ''' 308 | Class to handle RIR creation: 309 | Input 310 | ----- 311 | room_config : Roomconfig object 312 | 313 | ''' 314 | 315 | def __init__(self, fs, room, mics, RT60=None): 316 | self._do_init(fs, room, mics, RT60) 317 | self.verify_positions() 318 | 319 | def verify_positions(self): 320 | ''' 321 | Method to verify if all the microphones are inside the room 322 | ''' 323 | for mic in self.mics: 324 | assert mic.x_pos < self.room.x_val,\ 325 | mic._id+' x position is outside the room' 326 | assert mic.y_pos < self.room.y_val,\ 327 | mic._id+' y position is outside the room' 328 | assert mic.z_pos < self.room.z_val,\ 329 | mic._id+' z position is outside the room' 330 | 331 | 332 | @classmethod 333 | def init_from_config_file(cls, room_config_file, RT60=None): 334 | ''' 335 | constructor to read config file and initialize an instance 336 | ''' 337 | config = Config(room_config_file) 338 | sample_rate, room, mics = config.create_room_et_mic_objects() 339 | obj = cls(sample_rate, room, mics, RT60) 340 | return obj 341 | 342 | def _do_init(self, fs, room, mics, RT60): 343 | self.sampling_rate = fs 344 | self.room = room 345 | self.mics = mics 346 | mic_count = 0 347 | for mic in self.mics: 348 | mic_count += 1 349 | mic._id = str(mic_count) 350 | self.channels = len(mics) 351 | self.room_size = room.room_size 352 | self.F_abs = room.freq_dep_absorption['F_abs'] 353 | Ax1 = room.freq_dep_absorption['Ax1'] 354 | Ax2 = room.freq_dep_absorption['Ax2'] 355 | Ay1 = room.freq_dep_absorption['Ay1'] 356 | Ay2 = room.freq_dep_absorption['Ay2'] 357 | Az1 = room.freq_dep_absorption['Az1'] 358 | Az2 = room.freq_dep_absorption['Az2'] 359 | self.A = np.array([Ax1, Ax2, Ay1, Ay2, Az1, Az2]) 360 | self.A = self.A[:, self.F_abs<=self.sampling_rate/2.0] 361 | self.F_abs = self.F_abs[self.F_abs<=self.sampling_rate/2.0] 362 | if self.F_abs[0] != 0: 363 | self.A = np.vstack((self.A.T[0], self.A.T)).T 364 | self.F_abs = np.hstack((0, self.F_abs)) 365 | if self.F_abs[-1] != self.sampling_rate/2.0: 366 | self.A = np.vstack((self.A.T, self.A.T[-1])) 367 | self.F_abs = np.hstack((self.F_abs, self.sampling_rate/2.0)) 368 | 369 | self.tm_sensor = np.zeros((self.channels, 3, 3)) 370 | self.sensor_xyz = np.zeros((self.channels, 3)) 371 | self.sensor_off = np.zeros((self.channels, 3)) 372 | for idx, mic in enumerate(self.mics): 373 | self.sensor_xyz[idx, :] = mic.pos 374 | self.sensor_off[idx, :] = mic.orientation 375 | self.tm_sensor[idx, :, :] = self.__create_tm(\ 376 | self.__create_psi_theta_phi(mic.orientation)) 377 | if RT60 is None: 378 | self.RT60 = get_rt60(self.F_abs, self.room_size, self.A) 379 | else: 380 | self.RT60 = np.array([RT60] * len(self.F_abs)) 381 | 382 | 383 | def create_rir(self, source_xyz, source_off=None, source_dir=None): 384 | ''' 385 | Create the RIR 386 | source_xyz : list containing xyz position of the source 387 | source_off: 3 x 1 list representing the source orientation (azimuth, 388 | elevation, roll) 389 | source_dir: source directivity np txt file of dimension 181 x 361 390 | ''' 391 | 392 | source_xyz = np.array(source_xyz) 393 | if source_dir is None: 394 | # omnidirectional 395 | source_dir = np.ones((181,361)) 396 | else: 397 | source_dir = np.loadtxt(source_dir) 398 | if source_off is None: 399 | source_off = np.zeros(source_xyz.shape) 400 | 401 | [c_psi, s_psi, c_theta, s_theta, c_phi, s_phi] = \ 402 | self.__create_psi_theta_phi(source_off) 403 | tm_source = self.__create_tm([c_psi, s_psi, c_theta, s_theta, c_phi, s_phi]) 404 | Two_pi = 2*np.pi 405 | sampling_period = 1.0/self.sampling_rate 406 | nyquist = self.sampling_rate/2.0 # Half sampling frequency 407 | Fs_c = self.sampling_rate/343.0 # Samples per metre 408 | # Reflection order and impulse response length 409 | # H_length = longest reverberation time in samples (rounded down to integer) 410 | H_length = np.floor(np.max(self.RT60)*self.sampling_rate) 411 | range_ = H_length/Fs_c # H_length in metres 412 | Lx = self.room_size[0] 413 | Ly = self.room_size[1] 414 | Lz = self.room_size[2] 415 | order_x = np.ceil(range_/(2*Lx)); # Number in +x direction 416 | order_y = np.ceil(range_/(2*Ly)); # Number in +y direction 417 | order_z = np.ceil(range_/(2*Lz)); # Number in +z direction 418 | #Maximum number of image sources 419 | n_isources = int((2*order_x+1)*(2*order_y+1)*(2*order_z+1)*8) 420 | delay_s = Fs_c*np.sqrt(np.sum((source_xyz.T-self.sensor_xyz)**2, axis=1)) 421 | # Ensure H_length > 200 points so that a full CIPIC or MIT HRIR can be viewed 422 | H_length = int(np.max((H_length, np.ceil(np.max(np.max(delay_s)))+200))) 423 | # Interpolation filter for fractional delays 424 | N_frac = 32 # Order of FIR fractional delay filter 425 | Tw = N_frac*sampling_period # Window duration (seconds) 426 | Two_pi_Tw = Two_pi/Tw # Compute here for efficiency 427 | # Filter time window NB column vector of length (N_frac+1) symmetrical about t=0 428 | t = np.arange(-Tw/2, Tw/2+sampling_period, sampling_period) 429 | # Column vector of zero values for post-padding 430 | pad_frac = np.zeros((N_frac,1)) 431 | # Second order high-pass IIR filter to remove DC buildup (nominal -4dB cut-off at 20 Hz) 432 | w = 2*np.pi*20 433 | r1 = np.exp(-w*sampling_period) 434 | r2 = np.exp(-w*sampling_period) 435 | b1 = -(1+r2) 436 | b2 = np.copy(r2) #Numerator coefficients (fix zeros) 437 | a1 = 2*r1*np.cos(w*sampling_period) 438 | a2 = -r1*r1 #Denominator coefficients (fix poles) 439 | HP_gain = (1-b1+b2)/(1+a1-a2) #Normalisation gain 440 | b_HP = [1, b1, b2]/HP_gain 441 | a_HP = [1,-a1,-a2] 442 | # Further constants 443 | Two_Lx = 2*self.room_size[0] # Twice Length (Depth) 444 | Two_Ly = 2*self.room_size[1] # Twice Width 445 | Two_Lz = 2*self.room_size[2] # Twice Height 446 | #codes the eight permutations of x+/-xp, y+/-yp, z+/-zp 447 | #(the source to receiver vector components) where [-1 -1 -1] identifies the parent source. 448 | isource_ident = np.array([[-1, -1, -1], 449 | [-1, -1, +1], 450 | [-1, +1, -1], 451 | [-1, +1, +1], 452 | [+1, -1, -1], 453 | [+1, -1, +1], 454 | [+1, +1, -1], 455 | [+1, +1, +1]]) 456 | # Includes/excludes bx, by, bz depending on 0/1 state. 457 | surface_coeff = np.array([[0, 0, 0], 458 | [0, 0, 1], 459 | [0, 1, 0], 460 | [0, 1, 1], 461 | [1, 0, 0], 462 | [1, 0, 1], 463 | [1, 1, 0], 464 | [1, 1, 1]]) 465 | qq = surface_coeff[:,0] # for bx1 466 | jj = surface_coeff[:,1] # for by1 467 | kk = surface_coeff[:,2] # for bz1 468 | F_abs_N = self.F_abs/nyquist # Normalise the standard absorption frequency range for surfaces, (0 to 1) = (0 to Fs/2) 469 | N_refl = int(2*np.round(nyquist/self.F_abs[1])) # Required length of FIR filter modelling impulse response of surface(+air) 470 | Half_I = int(N_refl/2) # Half length of FIR filter model 471 | Half_I_plusone = Half_I+1 # Half length shift required for FIR filter model of surface impulse response 472 | # Compute the (N_refl+1) point column vector Hann window 473 | window = 0.5*(1 - np.cos(2*np.pi*np.arange(0, N_refl+1).T/N_refl)) 474 | #Image locations and impulse responses 475 | isource_xyz = np.zeros((3, n_isources)) # image source co-ordinates 476 | RR = len(self.F_abs); 477 | refl = np.zeros((RR, n_isources)) # surface reflection impulse amplitude (MEMORY CRITICAL POINT) 478 | xx = isource_ident[:,0]*source_xyz[0] # partial x coord of image. 479 | yy = isource_ident[:,1]*source_xyz[1] # partial y coord of image. 480 | zz = isource_ident[:,2]*source_xyz[2] # partial z coord of image. 481 | xx_yy_zz = np.array([xx, yy, zz]) 482 | n_images=-1; #number of significant images of each parent source 483 | # Frequency dependent surface reflection and coordinates and distance for each image 484 | B = np.sqrt(1-self.A); 485 | bx1, bx2, by1, by2, bz1, bz2 = B 486 | 487 | for n in np.arange(-order_x, order_x+1, 1): 488 | bx2_abs_n = bx2**np.abs(n) # Compute here for efficiency 489 | Two_n_Lx = n*Two_Lx # Compute here for efficiency 490 | for l in np.arange(-order_y, order_y+1, 1): 491 | bx2y2_abs_nl = bx2_abs_n*(by2**np.abs(l)) # Compute here for efficiency 492 | Two_l_Ly=l*Two_Ly # Compute here for efficiency 493 | for m in np.arange(-order_z, order_z+1, 1): 494 | # Compute here for efficiency 495 | bx2y2z2_abs_nlm=bx2y2_abs_nl*(bz2**np.abs(m)) 496 | Two_m_Lz=m*Two_Lz # Compute here for efficiency 497 | # Concatenate here for efficiency 498 | Two_nlm_Lxyz = [Two_n_Lx, Two_l_Ly, Two_m_Lz] 499 | for permu in np.arange(8): 500 | n_images=n_images+1 #Accumulate count of the image sources 501 | # calculate xyz coordinates of image source n_images 502 | isource_xyz[:,n_images] = Two_nlm_Lxyz - xx_yy_zz[:,permu] 503 | # minimal delay to sensors in samples 504 | delay=np.min(Fs_c*np.sqrt(np.sum(\ 505 | (isource_xyz[:, n_images] - \ 506 | self.sensor_xyz)**2, axis=1))); 507 | # compute only for image sources within impulse response length 508 | if delay <= H_length: 509 | refl[:,n_images] = bx1**np.abs(n-qq[permu])*\ 510 | by1**np.abs(l-jj[permu])*\ 511 | bz1**np.abs(m-kk[permu])*\ 512 | bx2y2z2_abs_nlm 513 | # (NB refl always +ve for air to surface, otherwise need abs here) 514 | if np.sum(refl[:,n_images]) < 1E-6: 515 | # Delete image sources with a sum of reflection coeffs below 1*10^-6 i.e. -120dB 516 | n_images=n_images-1 517 | else: 518 | # Delete image sources with a delay > impulse response length H_length 519 | n_images=n_images-1 520 | # Complete impulse response for the source 521 | n_images = n_images + 1 522 | isource_xyz = isource_xyz[:, :n_images] # Re-Allocate array for image source co-ordinates (discard trailing zero values) 523 | refl = refl[:, :n_images] # Re-Allocate array for surface reflection impulse amplitude (discard trailing zero values) 524 | H = np.zeros((H_length, self.channels)) 525 | m_air = 6.875e-4*(self.F_abs/1000)**(1.7) 526 | # attenuation factors for one metre travelled in air 527 | temp_count = 0 528 | atten_air = np.exp(-0.5*m_air).T 529 | for mic in self.mics: 530 | # Get the sensor direction-dependent impulse responses 531 | sensor_dir = mic.direction 532 | sensor_dir = np.loadtxt(sensor_dir+'.txt') 533 | sensor_No = int(mic._id)-1 534 | # for each of the n_images image sources 535 | for idx_image in np.arange(n_images): 536 | b_refl = refl[:, idx_image] 537 | # Position vector from sensor_No to source(idx_image) 538 | xyz = isource_xyz[:, idx_image]-self.sensor_xyz[sensor_No, :] 539 | # Distance (m) between image source(idx_image) and sensor_No 540 | dist = np.sqrt(np.sum(xyz**2)) 541 | # Include effect of distance (ie. 1/R) attenuation 542 | b_refl = b_refl/dist 543 | # Include the absorption due to air 544 | b_refl = b_refl*(atten_air**dist) 545 | # Estimate the values of reflection coefficient at the linear 546 | # interpolated grid points 547 | b_refl_func = interp1d(F_abs_N, b_refl) 548 | b_refl = b_refl_func(1.0/Half_I*np.arange(Half_I+1)) 549 | # Half spectrum of data b_refl is now made conjugate-symmetric 550 | #about Nyquist frequency, and last data point 551 | #discarded to make periodic spectrum corresponding to a real data sequence. 552 | b_refl = np.hstack((b_refl, b_refl[::-1][1:-1])) 553 | # Transform surface data from frequency response to impulse response. 554 | # IFFT to calculate impulse response column vector of length N_refl samples 555 | h_refl = np.real(np.fft.ifft(b_refl, N_refl)) 556 | # Make the impulse realisable (half length shift) and Hann window it 557 | h_refl = window*np.hstack((h_refl[Half_I_plusone-1:N_refl], h_refl[:Half_I_plusone])) 558 | # For primary sources, and image sources with impulse response peak magnitudes >= -100dB (1/100000) 559 | if (n_images==1) or np.max(np.abs(h_refl[:Half_I_plusone])) >= 1E-5: 560 | # Fractional delay filter 561 | delay = Fs_c*dist; # delay in samples = (Samples per metre)*Distance 562 | rdelay = np.round(delay); # Extract integer delay (concatenated later with impulse response) 563 | t_Td = t-(delay-rdelay)*sampling_period; # Take account of fractional delay -0.5 < D < +0.5 sample period 564 | hsf=.5*(1+np.cos(Two_pi_Tw*t_Td))*np.sinc(self.sampling_rate*t_Td); # Compute delayed filter impulse response for sensor 565 | # Convolve channel signals 566 | sig_to_conv = np.vstack((h_refl.reshape(len(h_refl), 1), pad_frac)) 567 | sig_to_conv = sig_to_conv.reshape(len(sig_to_conv),) 568 | h = scipy_sig.lfilter(hsf, 1, sig_to_conv) 569 | len_h=len(h); # length of impulse response modelling image source response 570 | adjust_delay = int(rdelay - np.ceil(len_h/2.0)) # Half length shift to remove delay due to impulse response 571 | # Sensor filter 572 | # position vector from each sensor location to each image source in sensor axes system 573 | xyz_source = np.dot(self.tm_sensor[sensor_No, :, :], xyz) 574 | # Distance (m) between sensor_No and proj of image source on xy plane 575 | hyp = np.sqrt(xyz_source[0]**2+xyz_source[1]**2); 576 | elevation = np.arctan(xyz_source[2]/(hyp+np.finfo(float).eps)); # Calculate -pi/2 <= elevation <= +pi/2 rads 577 | azimuth = np.arctan2(xyz_source[1],xyz_source[0]); # Calculate -pi <= azimuth <= +pi rad 578 | e_index = int(np.round(elevation*180/np.pi)+90) 579 | a_index = int(np.round(azimuth*180/np.pi)+180) 580 | sensor_ir=[sensor_dir[e_index,a_index]] 581 | #h=scipy_sig.lfilter(sensor_ir,1,np.hstack((h, np.zeros((len(sensor_ir)-1,1))))) 582 | h = scipy_sig.lfilter(sensor_ir, 1, h) 583 | # Source filter 584 | # position vector from each image source location to each sensor in source axes system 585 | xyz_sensor = -1 * np.dot(tm_source, xyz) 586 | # Distance (m) between image source and proj of sensor_No on xy plane 587 | hyp = np.sqrt(xyz_sensor[0]**2 + xyz_sensor[1]**2) 588 | # Calculate -pi/2 <= elevation <= +pi/2 rads 589 | elevation=np.arctan(xyz_sensor[2]/(hyp+np.finfo(float).eps)) 590 | # Calculate -pi <= azimuth <= +pi rad 591 | azimuth=np.arctan2(xyz_sensor[1],xyz_sensor[0]) 592 | e_index = int(np.round(elevation*180/np.pi)+90) 593 | a_index = int(np.round(azimuth*180/np.pi)+180) 594 | source_ir = [source_dir[e_index, a_index]] 595 | #h = scipy_sig.lfilter(source_ir,1,np.hstack((h, np.zeros((len(source_ir)-1,1))))) 596 | h = scipy_sig.lfilter(source_ir, 1, h) 597 | len_h = len(h); 598 | #Accumulate the impulse responses from each image source within an array of length H_length 599 | start_index_Hp = max(adjust_delay+(adjust_delay >= 0), 0) 600 | stop_index_Hp = min(adjust_delay+len_h, H_length) 601 | start_index_h = max(-adjust_delay, 0) 602 | stop_index_h = start_index_h + (stop_index_Hp - start_index_Hp) 603 | #print(temp_count, start_index_Hp, stop_index_Hp, start_index_h, stop_index_h) 604 | temp_count += 1 605 | if stop_index_h < 0: 606 | continue 607 | #Add whole or part of impulse response 608 | H[start_index_Hp:stop_index_Hp, sensor_No] = H[start_index_Hp:stop_index_Hp, sensor_No] + h[start_index_h:stop_index_h]; 609 | #High-pass filtering 610 | H[:, sensor_No] = scipy_sig.lfilter(b_HP, a_HP, H[:, sensor_No]) 611 | return H 612 | 613 | 614 | def __create_psi_theta_phi(self, source_off): 615 | c_psi = np.cos(np.pi/180*source_off[0]) 616 | s_psi = np.sin(np.pi/180*source_off[0]) 617 | c_theta = np.cos(-np.pi/180*source_off[1]) 618 | s_theta = np.sin(-np.pi/180*source_off[1]) 619 | c_phi = np.cos(np.pi/180*source_off[2]) 620 | s_phi = np.sin(np.pi/180*source_off[2]) 621 | return [c_psi, s_psi, c_theta, s_theta, c_phi, s_phi] 622 | 623 | def __create_tm(self, psi_theta_phi): 624 | c_psi, s_psi, c_theta, s_theta, c_phi, s_phi = psi_theta_phi 625 | tm_source = np.array([[c_theta*c_psi, \ 626 | c_theta*s_psi, \ 627 | -s_theta], \ 628 | [s_phi*s_theta*c_psi-c_phi*s_psi, \ 629 | s_phi*s_theta*s_psi+c_phi*c_psi, \ 630 | s_phi*c_theta], \ 631 | [c_phi*s_theta*c_psi+s_phi*s_psi, \ 632 | c_phi*s_theta*s_psi-s_phi*c_psi, \ 633 | c_phi*c_theta]]) 634 | return tm_source 635 | 636 | 637 | if __name__ == '__main__': 638 | 639 | parser = argparse.ArgumentParser() 640 | parser.add_argument('config', help='Config file') 641 | parser.add_argument('source_pos_x', help='Source x pos') 642 | parser.add_argument('source_pos_y', help='Source y pos') 643 | parser.add_argument('source_pos_z', help='Source z pos') 644 | parser.add_argument('out_file', help='File to write the RIR') 645 | args = parser.parse_args() 646 | source_pos = [float(args.source_pos_x), \ 647 | float(args.source_pos_y),\ 648 | float(args.source_pos_z)] 649 | sim_rir = RoomSim.init_from_config_file(args.config) 650 | rir = sim_rir.create_rir(source_pos) 651 | np.savetxt(args.out_file, rir) 652 | -------------------------------------------------------------------------------- /utils.py: -------------------------------------------------------------------------------- 1 | import numpy as np 2 | 3 | class CoOrdinates(object): 4 | ''' 5 | x y z value container 6 | ''' 7 | def __init__(self, pos_x, pos_y, pos_z): 8 | self.pos_x = pos_x 9 | self.pos_y = pos_y 10 | self.pos_z = pos_z 11 | self.dim = [self.pos_x, self.pos_y, self.pos_z] 12 | 13 | def __str__(self): 14 | return 'x:'+str(self.pos_x)+\ 15 | ' y:'+str(self.pos_y)+\ 16 | ' z:'+str(self.pos_z) 17 | 18 | def dim_to_str(self): 19 | ''' 20 | Convert dimension to string. Usefull for file name creation 21 | ''' 22 | return '_'.join([str(ele) for ele in self.dim]) 23 | 24 | 25 | class RoomSpec(CoOrdinates): 26 | ''' 27 | A position holder 28 | ''' 29 | def __init__(self, pos_x, pos_y, pos_z): 30 | super(RoomSpec, self).__init__(pos_x, pos_y, pos_z) 31 | 32 | def verify_if_inside_room(self, pos, delta=0.0): 33 | ''' 34 | Check if a position is inside a room. 35 | delta is the buffer 36 | ''' 37 | if pos.pos_x < 0 or pos.pos_y < 0 or pos.pos_z <0: 38 | return False 39 | if pos.pos_x + delta < self.pos_x and \ 40 | pos.pos_y + delta < self.pos_y and \ 41 | pos.pos_z + delta < self.pos_z: 42 | return True 43 | return False 44 | 45 | def verify_if_inside_room_with_pos(self, pos_x, pos_y, pos_z, delta=0.0): 46 | ''' 47 | Check if a position is inside a room. 48 | delta is the buffer 49 | ''' 50 | if pos_x < 0 or pos_y < 0 or pos_z <0: 51 | return False 52 | if pos_x + delta <= self.pos_x and \ 53 | pos_y + delta <= self.pos_y and \ 54 | pos_z + delta <= self.pos_z: 55 | return True 56 | return False 57 | 58 | def verify_if_inside_room_multi_pos(self, pos_list, delta=0.0): 59 | ''' 60 | Verify if points are inside room for multiple points 61 | ''' 62 | status = [] 63 | for pos in pos_list: 64 | status.append(self.verify_if_inside_room(pos, delta)) 65 | return status 66 | 67 | 68 | class Position(CoOrdinates): 69 | ''' 70 | A position holder 71 | ''' 72 | def __init__(self, pos_x, pos_y, pos_z): 73 | super(Position, self).__init__(pos_x, pos_y, pos_z) 74 | 75 | 76 | def compute_distance(self, pos): 77 | ''' 78 | Compute distance to other position 79 | ''' 80 | return np.sqrt(np.sum( 81 | (self.pos_x - pos.pos_x)**2+ 82 | (self.pos_y - pos.pos_y)**2+ 83 | (self.pos_z - pos.pos_z)**2)) 84 | 85 | def compute_distance_with_val(self, pos_x, pos_y, pos_z): 86 | ''' 87 | Compute distance to other position 88 | ''' 89 | return np.sqrt(np.sum( 90 | (self.pos_x - pos_x)**2+ 91 | (self.pos_y - pos_y)**2+ 92 | (self.pos_z - pos_z)**2)) 93 | 94 | def compute_multiple_distance(self, pos_list): 95 | ''' 96 | Compute distances for multiple positions 97 | ''' 98 | distance = [] 99 | for pos in pos_list: 100 | distance.append(self.compute_distance(pos)) 101 | return np.array(distance) 102 | 103 | def new_element_pos(room_dim, other_mics=None, dist_from_wall=0.5): 104 | ''' 105 | Create a new microphone position. Make sure it is far of from the 106 | other microphone positions 107 | ''' 108 | if other_mics is not None and len(other_mics) == 0: 109 | other_mics = None 110 | pos_min = dist_from_wall 111 | x_pos_max = room_dim.pos_x - dist_from_wall 112 | y_pos_max = room_dim.pos_y - dist_from_wall 113 | z_pos_max = room_dim.pos_z - dist_from_wall 114 | x_space = x_pos_max-pos_min 115 | y_space = y_pos_max-pos_min 116 | z_space = z_pos_max-pos_min 117 | 118 | assert x_space > 0 and y_space > 0 and z_space > 0,\ 119 | 'No space in the room to keep a element. \ 120 | Change ROOM settings in the config file' 121 | 122 | pos_x = x_space * np.random.rand() + pos_min 123 | pos_y = y_space * np.random.rand() + pos_min 124 | pos_z = z_space * np.random.rand() + pos_min 125 | pos = Position(pos_x, pos_y, pos_z) 126 | if other_mics is not None: 127 | if np.sum(pos.compute_multiple_distance(other_mics) < \ 128 | 0.5) > 0: 129 | pos = new_element_pos(room_dim, other_mics) 130 | return pos 131 | 132 | 133 | def create_new_room(room_max, room_min): 134 | ''' 135 | Decide soom width 136 | ''' 137 | room_range = room_max - room_min 138 | x_val = np.random.rand() * room_range + room_min 139 | y_val = np.random.rand() * room_range + room_min 140 | z_val = np.random.rand() * room_range + room_min 141 | room_obj = RoomSpec(x_val, y_val, z_val) 142 | return room_obj 143 | 144 | 145 | def generate_rt60(low_rt, high_rt): 146 | ''' 147 | Get a random RT60 148 | ''' 149 | rt60 = (high_rt - low_rt) * np.random.rand() + low_rt 150 | return rt60 151 | --------------------------------------------------------------------------------