mirror of https://github.com/AxioDL/boo.git
51 lines
2.1 KiB
C
51 lines
2.1 KiB
C
/* SoX Resampler Library Copyright (c) 2007-13 robs@users.sourceforge.net
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* Licence for this file: LGPL v2.1 See LICENCE for details. */
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/* Example 1: `One-shot' resample a single block of data in memory.
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*
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* N.B. See example 2 for how to resample a stream (of blocks).
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*
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* Optional arguments are: INPUT-RATE OUTPUT-RATE
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*
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* With the default arguments, the output should produce lines similar to the
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* following:
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*
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* 0.00 0.71 1.00 0.71 -0.00 -0.71 -1.00 -0.71
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*
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* Gibbs effect may be seen at the ends of the resampled signal; this is because
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* unlike a `real-world' signal, the synthetic input signal is not band-limited.
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*/
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#include <soxr.h>
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#include "examples-common.h"
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const float in[] = { /* Input: 12 cycles of a sine wave with freq. = irate/4 */
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0,1,0,-1, 0,1,0,-1, 0,1,0,-1, 0,1,0,-1, 0,1,0,-1, 0,1,0,-1,
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0,1,0,-1, 0,1,0,-1, 0,1,0,-1, 0,1,0,-1, 0,1,0,-1, 0,1,0,-1};
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int main(int argc, char const * arg[])
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{
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double irate = argc > 1? atof(arg[1]) : 1; /* Default to upsampling */
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double orate = argc > 2? atof(arg[2]) : 2; /* by a factor of 2. */
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size_t olen = (size_t)(AL(in) * orate / irate + .5); /* Assay output len. */
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float * out = malloc(sizeof(*out) * olen); /* Allocate output buffer. */
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size_t odone;
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soxr_error_t error = soxr_oneshot(irate, orate, 1, /* Rates and # of chans. */
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in, AL(in), NULL, /* Input. */
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out, olen, &odone, /* Output. */
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NULL, NULL, NULL); /* Default configuration.*/
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unsigned i = 0; /* Print out the resampled data, */
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while (i++ < odone)
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printf("%5.2f%c", out[i-1], " \n"[!(i&7) || i == odone]);
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printf("%-26s %s\n", arg[0], soxr_strerror(error)); /* and reported result. */
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if (argc > 3) /* Library version check: */
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printf("runtime=%s API="SOXR_THIS_VERSION_STR"\n", soxr_version());
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free(out); /* Tidy up. */
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return !!error;
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}
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