[+ AutoGen5 template h c +] /* ** Copyright (C) 2002-2012 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. */ /* ** Utility functions to make writing the test suite easier. ** ** The .c and .h files were generated automagically with Autogen from ** the files utils.def and utils.tpl. */ [+ CASE (suffix) +] [+ == h +] #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ #include #include #define ARRAY_LEN(x) ((int) (sizeof (x)) / (sizeof ((x) [0]))) #define SIGNED_SIZEOF(x) ((int64_t) (sizeof (x))) #define NOT(x) (! (x)) #define PIPE_INDEX(x) ((x) + 500) #define PIPE_TEST_LEN 12345 [+ FOR float_type +]void gen_windowed_sine_[+ (get "name") +] ([+ (get "name") +] *data, int len, double maximum) ; [+ ENDFOR float_type +] void create_short_sndfile (const char *filename, int format, int channels) ; void check_file_hash_or_die (const char *filename, uint64_t target_hash, int line_num) ; void print_test_name (const char *test, const char *filename) ; void dump_data_to_file (const char *filename, const void *data, unsigned int datalen) ; void write_mono_file (const char * filename, int format, int srate, float * output, int len) ; #ifdef __GNUC__ static inline void exit_if_true (int test, const char *format, ...) #ifdef __USE_MINGW_ANSI_STDIO __attribute__ ((format (gnu_printf, 2, 3))) ; #else __attribute__ ((format (printf, 2, 3))) ; #endif #endif static inline void exit_if_true (int test, const char *format, ...) { if (test) { va_list argptr ; va_start (argptr, format) ; vprintf (format, argptr) ; va_end (argptr) ; exit (1) ; } ; } /* exit_if_true */ /* ** Functions for saving two vectors of data in an ascii text file which ** can then be loaded into GNU octave for comparison. */ [+ FOR io_type +]int oct_save_[+ (get "io_element") +] (const [+ (get "io_element") +] *a, const [+ (get "io_element") +] *b, int len) ; [+ ENDFOR io_type +] void delete_file (int format, const char *filename) ; void count_open_files (void) ; void increment_open_file_count (void) ; void check_open_file_count_or_die (int lineno) ; #ifdef SNDFILE_H static inline void sf_info_clear (SF_INFO * info) { memset (info, 0, sizeof (SF_INFO)) ; } /* sf_info_clear */ static inline void sf_info_setup (SF_INFO * info, int format, int samplerate, int channels) { sf_info_clear (info) ; info->format = format ; info->samplerate = samplerate ; info->channels = channels ; } /* sf_info_setup */ void dump_log_buffer (SNDFILE *file) ; void check_log_buffer_or_die (SNDFILE *file, int line_num) ; int string_in_log_buffer (SNDFILE *file, const char *s) ; void hexdump_file (const char * filename, sf_count_t offset, sf_count_t length) ; SNDFILE *test_open_file_or_die (const char *filename, int mode, SF_INFO *sfinfo, int allow_fd, int line_num) ; void test_read_write_position_or_die (SNDFILE *file, int line_num, int pass, sf_count_t read_pos, sf_count_t write_pos) ; void test_seek_or_die (SNDFILE *file, sf_count_t offset, int whence, sf_count_t new_pos, int channels, int line_num) ; [+ FOR read_op +] [+ FOR io_type +]void test_[+ (get "op_element") +]_[+ (get "io_element") +]_or_die (SNDFILE *file, int pass, [+ (get "io_element") +] *test, sf_count_t [+ (get "count_name") +], int line_num) ; [+ ENDFOR io_type +][+ ENDFOR read_op +] void test_read_raw_or_die (SNDFILE *file, int pass, void *test, sf_count_t items, int line_num) ; [+ FOR write_op +] [+ FOR io_type +]void test_[+ (get "op_element") +]_[+ (get "io_element") +]_or_die (SNDFILE *file, int pass, const [+ (get "io_element") +] *test, sf_count_t [+ (get "count_name") +], int line_num) ; [+ ENDFOR io_type +][+ ENDFOR write_op +] void test_write_raw_or_die (SNDFILE *file, int pass, const void *test, sf_count_t items, int line_num) ; [+ FOR io_type +]void compare_[+ (get "io_element") +]_or_die (const [+ (get "io_element") +] *expected, const [+ (get "io_element") +] *actual, unsigned count, int line_num) ; [+ ENDFOR io_type +] void gen_lowpass_signal_float (float *data, int len) ; sf_count_t file_length (const char * fname) ; sf_count_t file_length_fd (int fd) ; #endif #ifdef __cplusplus } /* extern "C" */ #endif /* __cplusplus */ [+ == c +] #include "sfconfig.h" #include #include #include #if HAVE_UNISTD_H #include #endif #if (HAVE_DECL_S_IRGRP == 0) #include #endif #include #include #include #include #include #include #include #include "utils.h" #ifndef M_PI #define M_PI 3.14159265358979323846264338 #endif #define LOG_BUFFER_SIZE 2048 /* ** Neat solution to the Win32/OS2 binary file flage requirement. ** If O_BINARY isn't already defined by the inclusion of the system ** headers, set it to zero. */ #ifndef O_BINARY #define O_BINARY 0 #endif [+ FOR float_type +] void gen_windowed_sine_[+ (get "name") +] ([+ (get "name") +] *data, int len, double maximum) { int k ; memset (data, 0, len * sizeof ([+ (get "name") +])) ; /* ** Choose a frequency of 1/32 so that it aligns perfectly with a DFT ** bucket to minimise spreading of energy over more than one bucket. ** Also do not want to make the frequency too high as some of the ** codecs (ie gsm610) have a quite severe high frequency roll off. */ len /= 2 ; for (k = 0 ; k < len ; k++) { data [k] = sin (2.0 * k * M_PI * 1.0 / 32.0 + 0.4) ; /* Apply Hanning Window. */ data [k] *= maximum * (0.5 - 0.5 * cos (2.0 * M_PI * k / ((len) - 1))) ; } return ; } /* gen_windowed_sine_[+ (get "name") +] */ [+ ENDFOR float_type +] void create_short_sndfile (const char *filename, int format, int channels) { short data [2 * 3 * 4 * 5 * 6 * 7] = { 0, } ; SNDFILE *file ; SF_INFO sfinfo ; sfinfo.samplerate = 44100 ; sfinfo.channels = channels ; sfinfo.format = format ; if ((file = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL) { printf ("Error (%s, %d) : sf_open failed : %s\n", __FILE__, __LINE__, sf_strerror (file)) ; exit (1) ; } ; sf_write_short (file, data, ARRAY_LEN (data)) ; sf_close (file) ; } /* create_short_sndfile */ void check_file_hash_or_die (const char *filename, uint64_t target_hash, int line_num) { static unsigned char buf [4096] ; uint64_t cksum ; FILE *file ; int k, read_count ; memset (buf, 0, sizeof (buf)) ; /* The 'b' in the mode string means binary for Win32. */ if ((file = fopen (filename, "rb")) == NULL) { printf ("\n\nLine %d: could not open file '%s'\n\n", line_num, filename) ; exit (1) ; } ; cksum = 0 ; while ((read_count = fread (buf, 1, sizeof (buf), file))) for (k = 0 ; k < read_count ; k++) cksum = cksum * 511 + buf [k] ; fclose (file) ; if (target_hash == 0) { printf (" 0x%016" PRIx64 "\n", cksum) ; return ; } ; if (cksum != target_hash) { printf ("\n\nLine %d: incorrect hash value 0x%016" PRIx64 " should be 0x%016" PRIx64 ".\n\n", line_num, cksum, target_hash) ; exit (1) ; } ; return ; } /* check_file_hash_or_die */ void print_test_name (const char *test, const char *filename) { int count ; if (test == NULL) { printf (__FILE__ ": bad test of filename parameter.\n") ; exit (1) ; } ; if (filename == NULL || strlen (filename) == 0) { printf (" %-30s : ", test) ; count = 25 ; } else { printf (" %-30s : %s ", test, filename) ; count = 24 - strlen (filename) ; } ; while (count -- > 0) putchar ('.') ; putchar (' ') ; fflush (stdout) ; } /* print_test_name */ void dump_data_to_file (const char *filename, const void *data, unsigned int datalen) { FILE *file ; if ((file = fopen (filename, "wb")) == NULL) { printf ("\n\nLine %d : could not open file : %s\n\n", __LINE__, filename) ; exit (1) ; } ; if (fwrite (data, 1, datalen, file) != datalen) { printf ("\n\nLine %d : fwrite failed.\n\n", __LINE__) ; exit (1) ; } ; fclose (file) ; } /* dump_data_to_file */ /*-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- */ static char octfilename [] = "error.dat" ; [+ FOR io_type +]int oct_save_[+ (get "io_element") +] (const [+ (get "io_element") +] *a, const [+ (get "io_element") +] *b, int len) { FILE *file ; int k ; if (! (file = fopen (octfilename, "w"))) return 1 ; fprintf (file, "# Not created by Octave\n") ; fprintf (file, "# name: a\n") ; fprintf (file, "# type: matrix\n") ; fprintf (file, "# rows: %d\n", len) ; fprintf (file, "# columns: 1\n") ; for (k = 0 ; k < len ; k++) fprintf (file, [+ (get "format_str") +] "\n", a [k]) ; fprintf (file, "# name: b\n") ; fprintf (file, "# type: matrix\n") ; fprintf (file, "# rows: %d\n", len) ; fprintf (file, "# columns: 1\n") ; for (k = 0 ; k < len ; k++) fprintf (file, [+ (get "format_str") +] "\n", b [k]) ; fclose (file) ; return 0 ; } /* oct_save_[+ (get "io_element") +] */ [+ ENDFOR io_type +] void check_log_buffer_or_die (SNDFILE *file, int line_num) { static char buffer [LOG_BUFFER_SIZE] ; int count ; memset (buffer, 0, sizeof (buffer)) ; /* Get the log buffer data. */ count = sf_command (file, SFC_GET_LOG_INFO, buffer, LOG_BUFFER_SIZE) ; if (LOG_BUFFER_SIZE - count < 2) { printf ("\n\nLine %d : Possible long log buffer.\n", line_num) ; exit (1) ; } /* Look for "Should" */ if (strstr (buffer, "ould")) { printf ("\n\nLine %d : Log buffer contains `ould'. Dumping.\n", line_num) ; puts (buffer) ; exit (1) ; } ; /* Look for "**" */ if (strstr (buffer, "*")) { printf ("\n\nLine %d : Log buffer contains `*'. Dumping.\n", line_num) ; puts (buffer) ; exit (1) ; } ; /* Look for "Should" */ if (strstr (buffer, "nknown marker")) { printf ("\n\nLine %d : Log buffer contains `nknown marker'. Dumping.\n", line_num) ; puts (buffer) ; exit (1) ; } ; return ; } /* check_log_buffer_or_die */ int string_in_log_buffer (SNDFILE *file, const char *s) { static char buffer [LOG_BUFFER_SIZE] ; int count ; memset (buffer, 0, sizeof (buffer)) ; /* Get the log buffer data. */ count = sf_command (file, SFC_GET_LOG_INFO, buffer, LOG_BUFFER_SIZE) ; if (LOG_BUFFER_SIZE - count < 2) { printf ("Possible long log buffer.\n") ; exit (1) ; } /* Look for string */ return strstr (buffer, s) ? SF_TRUE : SF_FALSE ; } /* string_in_log_buffer */ void hexdump_file (const char * filename, sf_count_t offset, sf_count_t length) { FILE * file ; char buffer [16] ; int k, m, ch, readcount ; if (length > 1000000) { printf ("\n\nError : length (%" PRId64 ") too long.\n\n", offset) ; exit (1) ; } ; if ((file = fopen (filename, "r")) == NULL) { printf ("\n\nError : hexdump_file (%s) could not open file for read.\n\n", filename) ; exit (1) ; } ; if (fseek (file, offset, SEEK_SET) != 0) { printf ("\n\nError : fseek(file, %" PRId64 ", SEEK_SET) failed : %s\n\n", offset, strerror (errno)) ; exit (1) ; } ; puts ("\n\n") ; for (k = 0 ; k < length ; k+= sizeof (buffer)) { readcount = fread (buffer, 1, sizeof (buffer), file) ; printf ("%08" PRIx64 " : ", offset + k) ; for (m = 0 ; m < readcount ; m++) printf ("%02x ", buffer [m] & 0xFF) ; for (m = readcount ; m < SIGNED_SIZEOF (buffer) ; m++) printf (" ") ; printf (" ") ; for (m = 0 ; m < readcount ; m++) { ch = isprint (buffer [m]) ? buffer [m] : '.' ; putchar (ch) ; } ; if (readcount < SIGNED_SIZEOF (buffer)) break ; putchar ('\n') ; } ; puts ("\n") ; fclose (file) ; } /* hexdump_file */ void dump_log_buffer (SNDFILE *file) { static char buffer [LOG_BUFFER_SIZE] ; memset (buffer, 0, sizeof (buffer)) ; /* Get the log buffer data. */ sf_command (file, SFC_GET_LOG_INFO, buffer, LOG_BUFFER_SIZE) ; if (strlen (buffer) < 1) puts ("Log buffer empty.\n") ; else puts (buffer) ; return ; } /* dump_log_buffer */ SNDFILE * test_open_file_or_die (const char *filename, int mode, SF_INFO *sfinfo, int allow_fd, int line_num) { static int count = 0 ; SNDFILE *file ; const char *modestr, *func_name ; int oflags = 0, omode = 0, err ; /* ** Need to test both sf_open() and sf_open_fd(). ** Do so alternately. */ switch (mode) { case SFM_READ : modestr = "SFM_READ" ; oflags = O_RDONLY | O_BINARY ; omode = 0 ; break ; case SFM_WRITE : modestr = "SFM_WRITE" ; oflags = O_WRONLY | O_CREAT | O_TRUNC | O_BINARY ; omode = S_IRUSR | S_IWUSR | S_IRGRP ; break ; case SFM_RDWR : modestr = "SFM_RDWR" ; oflags = O_RDWR | O_CREAT | O_BINARY ; omode = S_IRUSR | S_IWUSR | S_IRGRP ; break ; default : printf ("\n\nLine %d: Bad mode.\n", line_num) ; fflush (stdout) ; exit (1) ; } ; if (OS_IS_WIN32) { /* Windows does not understand and ignores the S_IRGRP flag, but Wine ** gives a run time warning message, so just clear it. */ omode &= ~S_IRGRP ; } ; if (allow_fd && ((++count) & 1) == 1) { int fd ; /* Only use the three argument open() function if omode != 0. */ fd = (omode == 0) ? open (filename, oflags) : open (filename, oflags, omode) ; if (fd < 0) { printf ("\n\n%s : open failed : %s\n", __func__, strerror (errno)) ; exit (1) ; } ; func_name = "sf_open_fd" ; file = sf_open_fd (fd, mode, sfinfo, SF_TRUE) ; } else { func_name = "sf_open" ; file = sf_open (filename, mode, sfinfo) ; } ; if (file == NULL) { printf ("\n\nLine %d: %s (%s) failed : %s\n\n", line_num, func_name, modestr, sf_strerror (NULL)) ; dump_log_buffer (file) ; exit (1) ; } ; err = sf_error (file) ; if (err != SF_ERR_NO_ERROR) { printf ("\n\nLine %d : sf_error : %s\n\n", line_num, sf_error_number (err)) ; dump_log_buffer (file) ; exit (1) ; } ; return file ; } /* test_open_file_or_die */ void test_read_write_position_or_die (SNDFILE *file, int line_num, int pass, sf_count_t read_pos, sf_count_t write_pos) { sf_count_t pos ; /* Check the current read position. */ if (read_pos >= 0 && (pos = sf_seek (file, 0, SEEK_CUR | SFM_READ)) != read_pos) { printf ("\n\nLine %d ", line_num) ; if (pass > 0) printf ("(pass %d): ", pass) ; printf ("Read position (%" PRId64 ") should be %" PRId64 ".\n", pos, read_pos) ; exit (1) ; } ; /* Check the current write position. */ if (write_pos >= 0 && (pos = sf_seek (file, 0, SEEK_CUR | SFM_WRITE)) != write_pos) { printf ("\n\nLine %d", line_num) ; if (pass > 0) printf (" (pass %d)", pass) ; printf (" : Write position (%" PRId64 ") should be %" PRId64 ".\n", pos, write_pos) ; exit (1) ; } ; return ; } /* test_read_write_position */ void test_seek_or_die (SNDFILE *file, sf_count_t offset, int whence, sf_count_t new_pos, int channels, int line_num) { sf_count_t position ; const char *channel_name, *whence_name ; switch (whence) { case SEEK_SET : whence_name = "SEEK_SET" ; break ; case SEEK_CUR : whence_name = "SEEK_CUR" ; break ; case SEEK_END : whence_name = "SEEK_END" ; break ; /* SFM_READ */ case SEEK_SET | SFM_READ : whence_name = "SFM_READ | SEEK_SET" ; break ; case SEEK_CUR | SFM_READ : whence_name = "SFM_READ | SEEK_CUR" ; break ; case SEEK_END | SFM_READ : whence_name = "SFM_READ | SEEK_END" ; break ; /* SFM_WRITE */ case SEEK_SET | SFM_WRITE : whence_name = "SFM_WRITE | SEEK_SET" ; break ; case SEEK_CUR | SFM_WRITE : whence_name = "SFM_WRITE | SEEK_CUR" ; break ; case SEEK_END | SFM_WRITE : whence_name = "SFM_WRITE | SEEK_END" ; break ; default : printf ("\n\nLine %d: bad whence parameter.\n", line_num) ; exit (1) ; } ; channel_name = (channels == 1) ? "Mono" : "Stereo" ; if ((position = sf_seek (file, offset, whence)) != new_pos) { printf ("\n\nLine %d : %s : sf_seek (file, %" PRId64 ", %s) returned %" PRId64 " (should be %" PRId64 ").\n\n", line_num, channel_name, offset, whence_name, position, new_pos) ; exit (1) ; } ; } /* test_seek_or_die */ [+ FOR read_op +] [+ FOR io_type +] void test_[+ (get "op_element") +]_[+ (get "io_element") +]_or_die (SNDFILE *file, int pass, [+ (get "io_element") +] *test, sf_count_t [+ (get "count_name") +], int line_num) { sf_count_t count ; if ((count = sf_[+ (get "op_element") +]_[+ (get "io_element") +] (file, test, [+ (get "count_name") +])) != [+ (get "count_name") +]) { printf ("\n\nLine %d", line_num) ; if (pass > 0) printf (" (pass %d)", pass) ; printf (" : sf_[+ (get "op_element") +]_[+ (get "io_element") +] failed with short [+ (get "op_element") +] (%" PRId64 " => %" PRId64 ").\n", [+ (get "count_name") +], count) ; fflush (stdout) ; puts (sf_strerror (file)) ; exit (1) ; } ; return ; } /* test_[+ (get "op_element") +]_[+ (get "io_element") +]_or_die */ [+ ENDFOR io_type +][+ ENDFOR read_op +] void test_read_raw_or_die (SNDFILE *file, int pass, void *test, sf_count_t items, int line_num) { sf_count_t count ; if ((count = sf_read_raw (file, test, items)) != items) { printf ("\n\nLine %d", line_num) ; if (pass > 0) printf (" (pass %d)", pass) ; printf (" : sf_read_raw failed with short read (%" PRId64 " => %" PRId64 ").\n", items, count) ; fflush (stdout) ; puts (sf_strerror (file)) ; exit (1) ; } ; return ; } /* test_read_raw_or_die */ [+ FOR write_op +] [+ FOR io_type +] void test_[+ (get "op_element") +]_[+ (get "io_element") +]_or_die (SNDFILE *file, int pass, const [+ (get "io_element") +] *test, sf_count_t [+ (get "count_name") +], int line_num) { sf_count_t count ; if ((count = sf_[+ (get "op_element") +]_[+ (get "io_element") +] (file, test, [+ (get "count_name") +])) != [+ (get "count_name") +]) { printf ("\n\nLine %d", line_num) ; if (pass > 0) printf (" (pass %d)", pass) ; printf (" : sf_[+ (get "op_element") +]_[+ (get "io_element") +] failed with short [+ (get "op_element") +] (%" PRId64 " => %" PRId64 ").\n", [+ (get "count_name") +], count) ; fflush (stdout) ; puts (sf_strerror (file)) ; exit (1) ; } ; return ; } /* test_[+ (get "op_element") +]_[+ (get "io_element") +]_or_die */ [+ ENDFOR io_type +][+ ENDFOR write_op +] void test_write_raw_or_die (SNDFILE *file, int pass, const void *test, sf_count_t items, int line_num) { sf_count_t count ; if ((count = sf_write_raw (file, test, items)) != items) { printf ("\n\nLine %d", line_num) ; if (pass > 0) printf (" (pass %d)", pass) ; printf (" : sf_write_raw failed with short write (%" PRId64 " => %" PRId64 ").\n", items, count) ; fflush (stdout) ; puts (sf_strerror (file)) ; exit (1) ; } ; return ; } /* test_write_raw_or_die */ [+ FOR io_type +]void compare_[+ (get "io_element") +]_or_die (const [+ (get "io_element") +] *expected, const [+ (get "io_element") +] *actual, unsigned count, int line_num) { unsigned k ; for (k = 0 ; k < count ; k++) if (expected [k] != actual [k]) { printf ("\n\nLine %d : Error at index %d, got " [+ (get "format_str") +] ", should be " [+ (get "format_str") +] ".\n\n", line_num, k, actual [k], expected [k]) ; exit (1) ; } ; return ; } /* compare_[+ (get "io_element") +]_or_die */ [+ ENDFOR io_type +] void delete_file (int format, const char *filename) { char rsrc_name [512], *fname ; unlink (filename) ; if ((format & SF_FORMAT_TYPEMASK) != SF_FORMAT_SD2) return ; /* ** Now try for a resource fork stored as a separate file. ** Grab the un-adulterated filename again. */ snprintf (rsrc_name, sizeof (rsrc_name), "%s", filename) ; if ((fname = strrchr (rsrc_name, '/')) != NULL) fname ++ ; else if ((fname = strrchr (rsrc_name, '\\')) != NULL) fname ++ ; else fname = rsrc_name ; memmove (fname + 2, fname, strlen (fname) + 1) ; fname [0] = '.' ; fname [1] = '_' ; unlink (rsrc_name) ; } /* delete_file */ static int allowed_open_files = -1 ; void count_open_files (void) { #if OS_IS_WIN32 return ; #else int k, count = 0 ; struct stat statbuf ; if (allowed_open_files > 0) return ; for (k = 0 ; k < 1024 ; k++) if (fstat (k, &statbuf) == 0) count ++ ; allowed_open_files = count ; #endif } /* count_open_files */ void increment_open_file_count (void) { allowed_open_files ++ ; } /* increment_open_file_count */ void check_open_file_count_or_die (int lineno) { #if OS_IS_WIN32 (void) lineno ; return ; #else int k, count = 0 ; struct stat statbuf ; if (allowed_open_files < 0) count_open_files () ; for (k = 0 ; k < 1024 ; k++) if (fstat (k, &statbuf) == 0) count ++ ; if (count > allowed_open_files) { printf ("\nLine %d : number of open files (%d) > allowed (%d).\n\n", lineno, count, allowed_open_files) ; exit (1) ; } ; #endif } /* check_open_file_count_or_die */ void write_mono_file (const char * filename, int format, int srate, float * output, int len) { SNDFILE * file ; SF_INFO sfinfo ; memset (&sfinfo, 0, sizeof (sfinfo)) ; sfinfo.samplerate = srate ; sfinfo.channels = 1 ; sfinfo.format = format ; if ((file = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL) { printf ("sf_open (%s) : %s\n", filename, sf_strerror (NULL)) ; exit (1) ; } ; sf_write_float (file, output, len) ; sf_close (file) ; } /* write_mono_file */ void gen_lowpass_signal_float (float *data, int len) { int32_t value = 0x1243456 ; double sample, last_val = 0.0 ; int k ; for (k = 0 ; k < len ; k++) { /* Not a crypto quality RNG. */ value = 11117 * value + 211231 ; value = 11117 * value + 211231 ; value = 11117 * value + 211231 ; sample = value / (0x7fffffff * 1.000001) ; sample = 0.2 * sample - 0.9 * last_val ; last_val = sample ; data [k] = 0.5 * (sample + sin (2.0 * k * M_PI * 1.0 / 32.0)) ; } ; } /* gen_lowpass_signal_float */ /* ** Windows is fucked. ** If a file is opened R/W and data is written to it, then fstat will return ** the correct file length, but stat will return zero. */ sf_count_t file_length (const char * fname) { struct stat data ; if (stat (fname, &data) != 0) return 0 ; return (sf_count_t) data.st_size ; } /* file_length */ sf_count_t file_length_fd (int fd) { struct stat data ; memset (&data, 0, sizeof (data)) ; if (fstat (fd, &data) != 0) return 0 ; return (sf_count_t) data.st_size ; } /* file_length_fd */ [+ ESAC +]