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hc

2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/drivers/misc/echo/echo.c
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * SpanDSP - a series of DSP components for telephony
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  *
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  * cells.
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  *
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  * All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2, as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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  */
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 /*! \file */
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        Path Models", IEEE Transactions on communications, COM-25,
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        No. 6, June
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        1977.
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-       http://www.rowetel.com/images/echo/dual_path_paper.pdf
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+       https://www.rowetel.com/images/echo/dual_path_paper.pdf
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    [2] The classic, very useful paper that tells you how to
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        actually build a real world echo canceller:
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 	 Messerschmitt, Hedberg, Cole, Haoui, Winship, "Digital Voice
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 	 Echo Canceller with a TMS320020,
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-	 http://www.rowetel.com/images/echo/spra129.pdf
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+	 https://www.rowetel.com/images/echo/spra129.pdf
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    [3] I have written a series of blog posts on this work, here is
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        Part 1: http://www.rowetel.com/blog/?p=18
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    [4] The source code http://svn.rowetel.com/software/oslec/
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    [5] A nice reference on LMS filters:
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-	 http://en.wikipedia.org/wiki/Least_mean_squares_filter
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+	 https://en.wikipedia.org/wiki/Least_mean_squares_filter
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    Credits:
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