mirror of https://github.com/thesofproject/sof.git
55 lines
1.8 KiB
Matlab
55 lines
1.8 KiB
Matlab
function example_crossover();
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% Set the parameters here
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tplg_fn = "../../topology/topology1/m4/crossover_coef_default.m4" % Control Bytes File
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% Use those files with sof-ctl to update the component's configuration
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blob_fn = "../../ctl/crossover_coef.blob" % Blob binary file
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alsa_fn = "../../ctl/crossover_coef.txt" % ALSA CSV format file
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endian = "little";
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% Sampling Frequency and Frequency cut-offs for crossover
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fs = 48e3;
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fc_low = 200;
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fc_med = 1000;
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fc_high = 3000;
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% 4 way crossover
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num_sinks = 4;
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% This array is an example on how to assign a buffer from pipeline 1 to output 0,
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% buffer from pipeline 2 to output 1, etc...
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% Refer to sof/src/include/user/crossover.h for more information on assigning
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% buffers to outputs.
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assign_sinks = zeros(1, 4);
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assign_sinks(1) = 1; % sink[0]
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assign_sinks(2) = 2; % sink[1]
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assign_sinks(3) = 3; % sink[2]
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assign_sinks(4) = 4; % sink[3]
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% Generate zeros, poles and gain for crossover with the given frequencies
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%crossover = crossover_gen_coefs(fs, fc_low); % 2 way crossover
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% crossover = crossover_gen_coefs(fs, fc_low, fc_med); % 3 way crossover
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crossover = crossover_gen_coefs(fs, fc_low, fc_med, fc_high); % 4 way crossover
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% Convert the [a,b] coefficients to values usable with SOF
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crossover_bqs = crossover_coef_quant(crossover.lp, crossover.hp);
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% Convert coefficients to sof_crossover_config struct
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config = crossover_generate_config(crossover_bqs, num_sinks, assign_sinks);
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% Convert struct to binary blob
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blob8 = crossover_build_blob(config, endian);
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% Generate output files
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addpath ./../common
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tplg_write(tplg_fn, blob8, "CROSSOVER");
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blob_write(blob_fn, blob8);
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alsactl_write(alsa_fn, blob8);
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% Plot Magnitude and Phase Response of each sink
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crossover_plot_freq(crossover.lp, crossover.hp, fs, num_sinks);
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rmpath ./../common
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endfunction
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