mirror of https://github.com/thesofproject/sof.git
58 lines
1.6 KiB
Mathematica
58 lines
1.6 KiB
Mathematica
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function example_line_0mm36mm146mm182mm()
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% Creates beamformer for device with device with microphones
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% at 0, 36, 146, 182mm locations
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% SPDX-License-Identifier: BSD-3-Clause
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%
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% Copyright (c) 2022, Intel Corporation. All rights reserved.
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%
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% Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
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line_xyz(16e3, 40, -90:15:90);
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line_xyz(48e3, 80, -90:15:90);
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end
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function line_xyz(fs, fir_length, az)
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tplg_fn = sprintf('coef_line4_0mm36mm146mm182mm_%dkhz.m4', fs/1e3);
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sofctl_fn = sprintf('coef_line4_0mm36mm146mm182mm_%dkhz.txt', fs/1e3);
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% Get defaults
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close all;
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bf = bf_defaults();
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bf.fs = fs;
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bf.beta = 5;
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% Setup array
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bf.array = 'xyz';
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bf.mic_y = [182 146 36 0]*1e-3;
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bf.mic_x = [0 0 0 0];
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bf.mic_z = [0 0 0 0];
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% Despite xyz array this is line, so use the -90 .. +90 degree enum scale for
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% angles. Array equals 'line' get this setting automatically.
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bf.angle_enum_mult = 15;
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bf.angle_enum_offs = -90;
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% Design beamformer
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bf.fir_length = fir_length;
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bf.steer_az = az;
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bf.steer_el = 0 * az;
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bf.input_channel_select = [0 1 2 3]; % Input four channels
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bf.output_channel_mix = [3 3 3 3]; % Mix filters to channel 2^0 and 2^1
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bf.output_channel_mix_beam_off = [1 0 0 2]; % Filter 1 to channel 2^0, filter 4 to channel 2^1
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bf.output_stream_mix = [0 0 0 0]; % Mix filters to stream 0
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bf.num_output_channels = 2; % Stereo
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%bf.sofctl_fn = fullfile(bf.sofctl_path, sofctl_fn);
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%bf.tplg_fn = fullfile(bf.tplg_path, tplg_fn);
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bf = bf_filenames_helper(bf, 'line4_0mm36mm146mm182mm');
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bf = bf_design(bf);
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% Export files for topology and sof-ctl
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bf_export(bf);
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end
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