mirror of https://github.com/thesofproject/sof.git
54 lines
1.7 KiB
Mathematica
54 lines
1.7 KiB
Mathematica
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function example_circular_array()
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% example_circular_array()
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%
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% Creates a circular array configuration blobs for devices
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% with 6 microphones and radius 30 mm
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% SPDX-License-Identifier: BSD-3-Clause
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%
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% Copyright (c) 2021, 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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% Circular array with one beam and one output channel
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az = -180:30:150;
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circular_one_beam(16e3, 100e-3, 8, 28, az);
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circular_one_beam(48e3, 100e-3, 8, 64, az);
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end
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% Note: In the example all designs are made 2ch out for the test script
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% in tools/test/audio/tdfb_test.m to work correctly. So in this one beam
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% example there's a dual mono (stereo) output. If there would be no need
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% to build two beams design with same array this could be one channel out.
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function circular_one_beam(fs, r, n, fir_length, az);
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% Get defaults
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bf = bf_defaults();
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bf.input_channel_select = 0:(n-1); % Input all n channels to filters
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bf.output_channel_mix_beam_off = zeros(1, n); % For some stereo symmetry
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bf.output_channel_mix_beam_off(2) = 1; % Mic2 to channel 2^0
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bf.output_channel_mix_beam_off(n) = 2; % Mic2 to channel 2^1
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bf.output_channel_mix = 3 * ones(1, n); % Mix all filters to channel 1 and 2
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bf.output_stream_mix = zeros(1, n); % No support yet
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bf.num_output_channels = 2; % Two channels
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bf.num_output_streams = 1; % One sink stream
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bf.array = 'circular'; % Calculate xyz coordinates for circular
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bf.mic_n = n;
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% From parameters
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bf.fs = fs;
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bf.mic_r = r;
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bf.steer_az = az;
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bf.steer_el = 0 * az;
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bf.fir_length = fir_length;
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% Design
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bf = bf_filenames_helper(bf);
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bf = bf_design(bf);
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bf_export(bf);
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end
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