ref: 52b037beffa79d224930c2b9edb4a1d00fa2cae9
dir: /src/nulfile.c/
/* libSoX file format: null (c) 2006-8 SoX contributors * Based on an original idea by Carsten Borchardt * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or (at * your option) any later version. * * This library 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 Lesser * General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "sox_i.h" #include <string.h> static int startread(sox_format_t * ft) { if (!ft->signal.rate) { ft->signal.rate = SOX_DEFAULT_RATE; lsx_report("sample rate not specified; using %g", ft->signal.rate); } ft->signal.precision = ft->encoding.bits_per_sample? ft->encoding.bits_per_sample: SOX_SAMPLE_PRECISION; /* Default number of channels is application-dependent */ return SOX_SUCCESS; } static size_t read_samples(sox_format_t * ft, sox_sample_t * buf, size_t len) { /* Reading from null generates silence i.e. (sox_sample_t)0. */ (void)ft; memset(buf, 0, sizeof(sox_sample_t) * len); return len; /* Return number of samples "read". */ } static size_t write_samples( sox_format_t * ft, sox_sample_t const * buf, size_t len) { /* Writing to null just discards the samples */ (void)ft, (void)buf; return len; /* Return number of samples "written". */ } SOX_FORMAT_HANDLER(nul) { static const char * const names[] = {"null", NULL}; static sox_format_handler_t const handler = {SOX_LIB_VERSION_CODE, NULL, names, SOX_FILE_DEVICE | SOX_FILE_PHONY | SOX_FILE_NOSTDIO, startread, read_samples,NULL,NULL, write_samples,NULL,NULL, NULL, NULL, 0 }; return &handler; }