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Convert default resampler from libresample to libsoxr.

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v.audacity
2012-10-09 02:57:19 +00:00
parent de3bf9610a
commit 79faef4192
104 changed files with 13914 additions and 8 deletions
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79
lib-src/libsoxr/examples/3a-options.c Normal file
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/* SoX Resampler Library Copyright (c) 2007-12 robs@users.sourceforge.net
* Licence for this file: LGPL v2.1 See LICENCE for details. */
/* Example 3a: extends example 2a with multiple channels, multiple datatypes,
* and other options.
*
* The seven arguments are:
* INPUT-RATE As example 2a
* OUTPUT-RATE Ditto
* NUM-CHANNELS Number of interleaved channels
* IN-DATATYPE# 0:float32 1:float64 2:int32 3:int16
* OUT-DATATYPE# Ditto
* Q# Quality-recipe | (quality-flags << 16) (in hex) See soxr.h
* USE-THREADS 1 to use multi-threading
*/
#include "util.h"
#include <soxr.h>
int main(int n, char const * arg[])
{
char const * arg0 = n? --n, *arg++ : "";
double irate = n? --n, atof(*arg++) : 96000.;
double orate = n? --n, atof(*arg++) : 44100.;
unsigned chans = n? --n, (unsigned)atoi(*arg++) : 1;
soxr_datatype_t itype = n? --n, (soxr_datatype_t)atoi(*arg++) :SOXR_FLOAT32_I;
soxr_datatype_t otype = n? --n, (soxr_datatype_t)atoi(*arg++) :SOXR_FLOAT32_I;
unsigned long q_recipe= n? --n, strtoul(*arg++, 0, 16) : SOXR_HQ;
int use_threads = n? --n, atoi(*arg++) : 1;
size_t isize = soxr_datatype_size(itype) * chans;
size_t osize = soxr_datatype_size(otype) * chans;
size_t clips = 0;
soxr_error_t error;
soxr_quality_spec_t q_spec = soxr_quality_spec(q_recipe &65535, q_recipe>>16);
soxr_io_spec_t io_spec = soxr_io_spec(itype, otype);
soxr_runtime_spec_t runtime_spec = soxr_runtime_spec(!use_threads);
soxr_t resampler = soxr_create(
irate, orate, chans, &error, &io_spec, &q_spec, &runtime_spec);
STD_STDIO;
if (!error) {
#define buf_total_len 15000
/* Allocate resampling input and output buffers in proportion to the input
* and output rates: */
size_t ibuflen = (size_t)(irate * buf_total_len / (irate + orate) + .5);
size_t obuflen = buf_total_len - ibuflen;
char * ibuf = malloc(isize * ibuflen), * iptr = 0;
void * obuf = malloc(osize * obuflen);
size_t iavailable = 0;
size_t idone, odone, written;
do {
if (!iavailable && ibuf) /* If ibuf empty, try to fill it: */
if (!(iavailable = fread(iptr = ibuf, isize, ibuflen, stdin)))
free(ibuf), ibuf = 0; /* If none available, don't retry. */
error = soxr_process(resampler,
iptr, iavailable, &idone, obuf, obuflen, &odone);
iptr += idone * isize, iavailable -= idone; /* Consumed input. */
written = fwrite(obuf, osize, odone, stdout); /* Consume output. */
} while (!error && (ibuf || written));
free(obuf), free(ibuf);
clips = *soxr_num_clips(resampler); /* Can occur only with integer output.*/
soxr_delete(resampler);
}
fprintf(stderr, "%s %s; %lu clips; I/O: %s\n", arg0, soxr_strerror(error),
(long unsigned)clips, errno? strerror(errno) : "no error");
return error || errno;
}