X-Git-Url: https://scm.cri.ensmp.fr/git/Faustine.git/blobdiff_plain/1059e1cc0c2ecfa237406949aa26155b6a5b9154..66f23d4fabf89ad09adbd4dfc15ac6b5b2b7da83:/interpretor/lib/src/libsndfile-1.0.25/tests/ulaw_test.c diff --git a/interpretor/lib/src/libsndfile-1.0.25/tests/ulaw_test.c b/interpretor/lib/src/libsndfile-1.0.25/tests/ulaw_test.c deleted file mode 100644 index c2644f1..0000000 --- a/interpretor/lib/src/libsndfile-1.0.25/tests/ulaw_test.c +++ /dev/null @@ -1,257 +0,0 @@ -/* -** Copyright (C) 1999-2011 Erik de Castro Lopo -** -** This program is free software; you can redistribute it and/or modify -** it under the terms of the GNU General Public License as published by -** the Free Software Foundation; either version 2 of the License, or -** (at your option) any later version. -** -** This program 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 General Public License for more details. -** -** You should have received a copy of the GNU General Public License -** along with this program; if not, write to the Free Software -** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -*/ - -#include "sfconfig.h" - -#include -#include -#include - -#if HAVE_UNISTD_H -#include -#endif - -#include - -#include "utils.h" - -#define BUFFER_SIZE (65536) - -static unsigned char ulaw_encode (int sample) ; -static int ulaw_decode (unsigned int ulawbyte) ; - -static short short_buffer [BUFFER_SIZE] ; -static unsigned char ulaw_buffer [BUFFER_SIZE] ; - -int -main (void) -{ SNDFILE *file ; - SF_INFO sfinfo ; - const char *filename ; - int k ; - - print_test_name ("ulaw_test", "encoder") ; - - filename = "test.raw" ; - - sf_info_setup (&sfinfo, SF_FORMAT_RAW | SF_FORMAT_ULAW, 44100, 1) ; - - if ((file = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL) - { printf ("sf_open_write failed with error : ") ; - fflush (stdout) ; - puts (sf_strerror (NULL)) ; - exit (1) ; - } ; - - /* Generate a file containing all possible 16 bit sample values - ** and write it to disk as ulaw encoded.frames. - */ - - for (k = 0 ; k < 0x10000 ; k++) - short_buffer [k] = k & 0xFFFF ; - - sf_write_short (file, short_buffer, BUFFER_SIZE) ; - sf_close (file) ; - - /* Now open that file and compare the ulaw encoded sample values - ** with what they should be. - */ - - if ((file = sf_open (filename, SFM_READ, &sfinfo)) == NULL) - { printf ("sf_open_write failed with error : ") ; - puts (sf_strerror (NULL)) ; - exit (1) ; - } ; - - check_log_buffer_or_die (file, __LINE__) ; - - if (sf_read_raw (file, ulaw_buffer, BUFFER_SIZE) != BUFFER_SIZE) - { printf ("sf_read_raw : ") ; - puts (sf_strerror (file)) ; - exit (1) ; - } ; - - for (k = 0 ; k < 0x10000 ; k++) - if (ulaw_encode (short_buffer [k]) != ulaw_buffer [k]) - { printf ("Encoder error : sample #%d (0x%02X should be 0x%02X)\n", k, ulaw_buffer [k], ulaw_encode (short_buffer [k])) ; - exit (1) ; - } ; - - sf_close (file) ; - - puts ("ok") ; - - print_test_name ("ulaw_test", "decoder") ; - - /* Now generate a file containing all possible 8 bit encoded - ** sample values and write it to disk as ulaw encoded.frames. - */ - - if (! (file = sf_open (filename, SFM_WRITE, &sfinfo))) - { printf ("sf_open_write failed with error : ") ; - puts (sf_strerror (NULL)) ; - exit (1) ; - } ; - - for (k = 0 ; k < 256 ; k++) - ulaw_buffer [k] = k & 0xFF ; - - sf_write_raw (file, ulaw_buffer, 256) ; - sf_close (file) ; - - /* Now open that file and compare the ulaw decoded sample values - ** with what they should be. - */ - - if (! (file = sf_open (filename, SFM_READ, &sfinfo))) - { printf ("sf_open_write failed with error : ") ; - puts (sf_strerror (NULL)) ; - exit (1) ; - } ; - - check_log_buffer_or_die (file, __LINE__) ; - - if (sf_read_short (file, short_buffer, 256) != 256) - { printf ("sf_read_short : ") ; - puts (sf_strerror (file)) ; - exit (1) ; - } ; - - - for (k = 0 ; k < 256 ; k++) - if (short_buffer [k] != ulaw_decode (ulaw_buffer [k])) - { printf ("Decoder error : sample #%d (0x%04X should be 0x%04X)\n", k, short_buffer [k], ulaw_decode (ulaw_buffer [k])) ; - exit (1) ; - } ; - - sf_close (file) ; - - puts ("ok") ; - - unlink (filename) ; - - return 0 ; -} /* main */ - - -/*================================================================================= -** The following routines came from the sox-12.15 (Sound eXcahcnge) distribution. -** -** This code is not compiled into libsndfile. It is only used to test the -** libsndfile lookup tables for correctness. -** -** I have included the original authors comments. -*/ - -/* -** This routine converts from linear to ulaw. -** -** Craig Reese: IDA/Supercomputing Research Center -** Joe Campbell: Department of Defense -** 29 September 1989 -** -** References: -** 1) CCITT Recommendation G.711 (very difficult to follow) -** 2) "A New Digital Technique for Implementation of Any -** Continuous PCM Companding Law," Villeret, Michel, -** et al. 1973 IEEE Int. Conf. on Communications, Vol 1, -** 1973, pg. 11.12-11.17 -** 3) MIL-STD-188-113,"Interoperability and Performance Standards -** for Analog-to_Digital Conversion Techniques," -** 17 February 1987 -** -** Input: Signed 16 bit linear sample -** Output: 8 bit ulaw sample -*/ - -#define uBIAS 0x84 /* define the add-in bias for 16 bit.frames */ -#define uCLIP 32635 - -static -unsigned char ulaw_encode (int sample) -{ static int exp_lut [256] = - { 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, - 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, - 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, - 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, - 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, - 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7 - } ; - - int sign, exponent, mantissa ; - unsigned char ulawbyte ; - - /* Get the sample into sign-magnitude. */ - sign = (sample >> 8) & 0x80 ; /* set aside the sign */ - if ( sign != 0 ) - sample = -sample ; /* get magnitude */ - if ( sample > uCLIP ) - sample = uCLIP ; /* clip the magnitude */ - - /* Convert from 16 bit linear to ulaw. */ - sample = sample + uBIAS ; - exponent = exp_lut [( sample >> 7 ) & 0xFF] ; - mantissa = (sample >> ( exponent + 3 ) ) & 0x0F ; - ulawbyte = ~ (sign | ( exponent << 4 ) | mantissa) ; - - return ulawbyte ; -} /* ulaw_encode */ - - -/* -** This routine converts from ulaw to 16 bit linear. -** -** Craig Reese: IDA/Supercomputing Research Center -** 29 September 1989 -** -** References: -** 1) CCITT Recommendation G.711 (very difficult to follow) -** 2) MIL-STD-188-113,"Interoperability and Performance Standards -** for Analog-to_Digital Conversion Techniques," -** 17 February 1987 -** -** Input: 8 bit ulaw sample -** Output: signed 16 bit linear sample -*/ - -static -int ulaw_decode (unsigned int ulawbyte) -{ static int exp_lut [8] = { 0, 132, 396, 924, 1980, 4092, 8316, 16764 } ; - int sign, exponent, mantissa, sample ; - - ulawbyte = ~ ulawbyte ; - sign = (ulawbyte & 0x80) ; - exponent = (ulawbyte >> 4) & 0x07 ; - mantissa = ulawbyte & 0x0F ; - sample = exp_lut [exponent] + (mantissa << (exponent + 3)) ; - if (sign != 0) - sample = -sample ; - - return sample ; -} /* ulaw_decode */ -