mirror of https://github.com/thesofproject/sof.git
57 lines
1.7 KiB
Matlab
57 lines
1.7 KiB
Matlab
function example_drc();
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% Set the parameters here
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tplg_fn = "../../topology/topology1/m4/drc_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/drc_coef.blob"; % Blob binary file
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alsa_fn = "../../ctl/drc_coef.txt"; % ALSA CSV format file
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endian = "little";
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sample_rate = 48000;
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% The parameters of the DRC compressor
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% enabled: 1 to enable the compressor, 0 to disable it
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params.enabled = 0;
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% threshold: The value above which the compression starts, in dB
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params.threshold = -24;
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% knee: The value above which the knee region starts, in dB
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params.knee = 30;
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% ratio: The input/output dB ratio after the knee region
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params.ratio = 12;
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% attack: The time to reduce the gain by 10dB, in seconds
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params.attack = 0.003;
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% release: The time to increase the gain by 10dB, in seconds
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params.release = 0.25;
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% pre_delay: The lookahead time for the compressor, in seconds
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params.pre_delay = 0.006;
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% release_zone[4]: The adaptive release curve parameters
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params.release_zone = [0.09 0.16 0.42 0.98];
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% release_spacing: The value of spacing per frame while releasing, in dB
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params.release_spacing = 5;
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% post_gain: The static boost value in output, in dB
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params.post_gain = 0;
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% Generate coefficients for DRC with the given parameters
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coefs = drc_gen_coefs(params, sample_rate);
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% Convert coefficients to sof_drc_config struct
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config = drc_generate_config(coefs);
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% Convert struct to binary blob
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blob8 = drc_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, "DRC");
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blob_write(blob_fn, blob8);
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alsactl_write(alsa_fn, blob8);
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% Plot x-y response in dB
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drc_plot_db_curve(coefs);
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rmpath ./../common
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endfunction
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