From 78f4b2855256c930adea77479e4577f4289a6cfa Mon Sep 17 00:00:00 2001 From: Russell Bryant Date: Wed, 2 Jan 2008 01:00:44 +0000 Subject: Instead of linking libresample into the main Asterisk binary, build it as res_resample, and mark codec_resample as dependent upon res_resample. This prevents the linker from optimizing away libresample, and also makes it so the libresample code isn't linked in to multiple places. (I have another module in a branch that needs it, too.) git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@95697 65c4cc65-6c06-0410-ace0-fbb531ad65f3 --- main/libresample/README.txt | 84 --------------------------------------------- 1 file changed, 84 deletions(-) delete mode 100644 main/libresample/README.txt (limited to 'main/libresample/README.txt') diff --git a/main/libresample/README.txt b/main/libresample/README.txt deleted file mode 100644 index 14be45b83..000000000 --- a/main/libresample/README.txt +++ /dev/null @@ -1,84 +0,0 @@ -libresample - -Real-time library interface by Dominic Mazzoni - -Based on resample-1.7: - http://www-ccrma.stanford.edu/~jos/resample/ - -License: LGPL - see the file LICENSE.txt for more information - -History: - -This library is not the highest-quality resampling library -available, nor is it the most flexible, nor is it the -fastest. But it is pretty good in all of these regards, and -it is quite portable. The best resampling library I am aware -of is libsamplerate by Erik de Castro Lopo. It's small, fast, -and very high quality. However, it uses the GPL for its -license (with commercial options available) and I needed -a more free library. So I wrote this library, using -the LGPL resample-1.7 library by Julius Smith as a basis. - -Resample-1.7 is a fixed-point resampler, and as a result -has only limited precision. I rewrote it to use single-precision -floating-point arithmetic instead and increased the number -of filter coefficients between time steps significantly. -On modern processors it can resample in real time even -with this extra overhead. - -Resample-1.7 was designed to read and write from files, so -I removed all of that code and replaced it with an API that -lets you pass samples in small chunks. It should be easy -to link to resample-1.7 as a library. - -Changes in version 0.1.3: - -* Fixed two bugs that were causing subtle problems - on Intel x86 processors due to differences in roundoff errors. - -* Prefixed most function names with lrs and changed header file - from resample.h to libresample.h, to avoid namespace - collisions with existing programs and libraries. - -* Added resample_dup (thanks to Glenn Maynard) - -* Argument to resample_get_filter_width takes a const void * - (thanks to Glenn Maynard) - -* resample-sndfile clips output to -1...1 (thanks to Glenn Maynard) - -Usage notes: - -- If the output buffer you pass is too small, resample_process - may not use any input samples because its internal output - buffer is too full to process any more. So do not assume - that it is an error just because no input samples were - consumed. Just keep passing valid output buffers. - -- Given a resampling factor f > 1, and a number of input - samples n, the number of output samples should be between - floor(n - f) and ceil(n + f). In other words, if you - resample 1000 samples at a factor of 8, the number of - output samples might be between 7992 and 8008. Do not - assume that it will be exactly 8000. If you need exactly - 8000 outputs, pad the input with extra zeros as necessary. - -License and warranty: - -All of the files in this package are Copyright 2003 by Dominic -Mazzoni . This library was based heavily -on Resample-1.7, Copyright 1994-2002 by Julius O. Smith III -, all rights reserved. - -Permission to use and copy is granted subject to the terms of the -"GNU Lesser General Public License" (LGPL) as published by the -Free Software Foundation; either version 2.1 of the License, -or any later version. In addition, Julius O. Smith III requests -that a copy of any modified files be sent by email to -jos@ccrma.stanford.edu so that he may incorporate them into the -CCRMA version. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. -- cgit v1.2.3