mirror of
https://gitee.com/openharmony/third_party_libsnd
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aa3346cc6e
When two tests share a temporary filename they can cause ctest to fail
when run in parallel mode since both would attempt to operate on the
same file if scheduled to run at the same time.
To fix this, filenames in the smaller tests have been individually
renamed, and for the bigger tests a prefix has been added to make them
unique.
The complete list of conflicting filenames (which were then manually
inspected) was generated by running the following command in 'tests':
for file in $(grep -hoER \"\\w+\\.\\w+\" | sort | uniq -d)
do echo $file
grep -Rn $file
echo
done | less
260 lines
7.0 KiB
C
260 lines
7.0 KiB
C
/*
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** Copyright (C) 1999-2012 Erik de Castro Lopo <erikd@mega-nerd.com>
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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 as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "sfconfig.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#else
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#include "sf_unistd.h"
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#endif
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#include <sndfile.h>
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#include "utils.h"
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#define BUFFER_SIZE (65536)
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static unsigned char ulaw_encode (int sample) ;
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static int ulaw_decode (unsigned int ulawbyte) ;
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static short short_buffer [BUFFER_SIZE] ;
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static unsigned char ulaw_buffer [BUFFER_SIZE] ;
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int
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main (void)
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{ SNDFILE *file ;
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SF_INFO sfinfo ;
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const char *filename ;
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int k ;
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print_test_name ("ulaw_test", "encoder") ;
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filename = "ulaw_test.raw" ;
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sf_info_setup (&sfinfo, SF_FORMAT_RAW | SF_FORMAT_ULAW, 44100, 1) ;
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if ((file = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL)
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{ printf ("sf_open_write failed with error : ") ;
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fflush (stdout) ;
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puts (sf_strerror (NULL)) ;
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exit (1) ;
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} ;
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/* Generate a file containing all possible 16 bit sample values
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** and write it to disk as ulaw encoded.frames.
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*/
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for (k = 0 ; k < 0x10000 ; k++)
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short_buffer [k] = k & 0xFFFF ;
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sf_write_short (file, short_buffer, BUFFER_SIZE) ;
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sf_close (file) ;
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/* Now open that file and compare the ulaw encoded sample values
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** with what they should be.
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*/
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if ((file = sf_open (filename, SFM_READ, &sfinfo)) == NULL)
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{ printf ("sf_open_write failed with error : ") ;
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puts (sf_strerror (NULL)) ;
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exit (1) ;
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} ;
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check_log_buffer_or_die (file, __LINE__) ;
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if (sf_read_raw (file, ulaw_buffer, BUFFER_SIZE) != BUFFER_SIZE)
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{ printf ("sf_read_raw : ") ;
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puts (sf_strerror (file)) ;
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exit (1) ;
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} ;
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for (k = 0 ; k < 0x10000 ; k++)
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if (ulaw_encode (short_buffer [k]) != ulaw_buffer [k])
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{ printf ("Encoder error : sample #%d (0x%02X should be 0x%02X)\n", k, ulaw_buffer [k], ulaw_encode (short_buffer [k])) ;
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exit (1) ;
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} ;
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sf_close (file) ;
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puts ("ok") ;
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print_test_name ("ulaw_test", "decoder") ;
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/* Now generate a file containing all possible 8 bit encoded
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** sample values and write it to disk as ulaw encoded.frames.
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*/
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if (! (file = sf_open (filename, SFM_WRITE, &sfinfo)))
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{ printf ("sf_open_write failed with error : ") ;
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puts (sf_strerror (NULL)) ;
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exit (1) ;
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} ;
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for (k = 0 ; k < 256 ; k++)
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ulaw_buffer [k] = k & 0xFF ;
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sf_write_raw (file, ulaw_buffer, 256) ;
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sf_close (file) ;
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/* Now open that file and compare the ulaw decoded sample values
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** with what they should be.
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*/
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if (! (file = sf_open (filename, SFM_READ, &sfinfo)))
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{ printf ("sf_open_write failed with error : ") ;
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puts (sf_strerror (NULL)) ;
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exit (1) ;
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} ;
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check_log_buffer_or_die (file, __LINE__) ;
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if (sf_read_short (file, short_buffer, 256) != 256)
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{ printf ("sf_read_short : ") ;
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puts (sf_strerror (file)) ;
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exit (1) ;
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} ;
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for (k = 0 ; k < 256 ; k++)
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if (short_buffer [k] != ulaw_decode (ulaw_buffer [k]))
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{ printf ("Decoder error : sample #%d (0x%04X should be 0x%04X)\n", k, short_buffer [k], ulaw_decode (ulaw_buffer [k])) ;
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exit (1) ;
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} ;
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sf_close (file) ;
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puts ("ok") ;
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unlink (filename) ;
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return 0 ;
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} /* main */
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/*=================================================================================
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** The following routines came from the sox-12.15 (Sound eXcahcnge) distribution.
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**
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** This code is not compiled into libsndfile. It is only used to test the
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** libsndfile lookup tables for correctness.
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**
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** I have included the original authors comments.
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*/
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/*
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** This routine converts from linear to ulaw.
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**
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** Craig Reese: IDA/Supercomputing Research Center
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** Joe Campbell: Department of Defense
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** 29 September 1989
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**
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** References:
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** 1) CCITT Recommendation G.711 (very difficult to follow)
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** 2) "A New Digital Technique for Implementation of Any
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** Continuous PCM Companding Law," Villeret, Michel,
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** et al. 1973 IEEE Int. Conf. on Communications, Vol 1,
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** 1973, pg. 11.12-11.17
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** 3) MIL-STD-188-113,"Interoperability and Performance Standards
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** for Analog-to_Digital Conversion Techniques,"
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** 17 February 1987
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**
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** Input: Signed 16 bit linear sample
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** Output: 8 bit ulaw sample
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*/
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#define uBIAS 0x84 /* define the add-in bias for 16 bit.frames */
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#define uCLIP 32635
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static
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unsigned char ulaw_encode (int sample)
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{ static int exp_lut [256] =
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{ 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
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} ;
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int sign, exponent, mantissa ;
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unsigned char ulawbyte ;
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/* Get the sample into sign-magnitude. */
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sign = (sample >> 8) & 0x80 ; /* set aside the sign */
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if (sign != 0)
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sample = -sample ; /* get magnitude */
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if (sample > uCLIP)
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sample = uCLIP ; /* clip the magnitude */
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/* Convert from 16 bit linear to ulaw. */
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sample = sample + uBIAS ;
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exponent = exp_lut [(sample >> 7) & 0xFF] ;
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mantissa = (sample >> (exponent + 3)) & 0x0F ;
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ulawbyte = ~ (sign | (exponent << 4) | mantissa) ;
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return ulawbyte ;
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} /* ulaw_encode */
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/*
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** This routine converts from ulaw to 16 bit linear.
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**
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** Craig Reese: IDA/Supercomputing Research Center
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** 29 September 1989
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**
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** References:
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** 1) CCITT Recommendation G.711 (very difficult to follow)
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** 2) MIL-STD-188-113,"Interoperability and Performance Standards
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** for Analog-to_Digital Conversion Techniques,"
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** 17 February 1987
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**
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** Input: 8 bit ulaw sample
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** Output: signed 16 bit linear sample
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*/
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static
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int ulaw_decode (unsigned int ulawbyte)
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{ static int exp_lut [8] = { 0, 132, 396, 924, 1980, 4092, 8316, 16764 } ;
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int sign, exponent, mantissa, sample ;
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ulawbyte = ~ ulawbyte ;
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sign = (ulawbyte & 0x80) ;
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exponent = (ulawbyte >> 4) & 0x07 ;
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mantissa = ulawbyte & 0x0F ;
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sample = exp_lut [exponent] + (mantissa << (exponent + 3)) ;
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if (sign != 0)
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sample = -sample ;
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return sample ;
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} /* ulaw_decode */
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