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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio 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 of the License,
or (at your option) any later version.
polypaudio 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 Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <assert.h>
#include <sndfile.h>
#include <polyp/sample.h>
#include <polypcore/log.h>
#include "sound-file.h"
#define MAX_FILE_SIZE (1024*1024)
int pa_sound_file_load(const char *fname, pa_sample_spec *ss, pa_memchunk *chunk, pa_memblock_stat *s) {
SNDFILE*sf = NULL;
SF_INFO sfinfo;
int ret = -1;
size_t l;
sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames);
assert(fname && ss && chunk);
chunk->memblock = NULL;
chunk->index = chunk->length = 0;
memset(&sfinfo, 0, sizeof(sfinfo));
if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
pa_log(__FILE__": Failed to open file %s", fname);
goto finish;
}
switch (sfinfo.format & SF_FORMAT_SUBMASK) {
case SF_FORMAT_FLOAT:
case SF_FORMAT_DOUBLE:
/* Only float and double need a special case. */
ss->format = PA_SAMPLE_FLOAT32NE;
readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
break;
default:
/* Everything else is cleanly converted to signed 16 bit. */
ss->format = PA_SAMPLE_S16NE;
readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
break;
}
ss->rate = sfinfo.samplerate;
ss->channels = sfinfo.channels;
if (!pa_sample_spec_valid(ss)) {
pa_log(__FILE__": Unsupported sample format in file %s", fname);
goto finish;
}
if ((l = pa_frame_size(ss)*sfinfo.frames) > MAX_FILE_SIZE) {
pa_log(__FILE__": File too large");
goto finish;
}
chunk->memblock = pa_memblock_new(l, s);
assert(chunk->memblock);
chunk->index = 0;
chunk->length = l;
if (readf_function(sf, chunk->memblock->data, sfinfo.frames) != sfinfo.frames) {
pa_log(__FILE__": Premature file end");
goto finish;
}
ret = 0;
finish:
if (sf)
sf_close(sf);
if (ret != 0 && chunk->memblock)
pa_memblock_unref(chunk->memblock);
return ret;
}
int pa_sound_file_too_big_to_cache(const char *fname) {
SNDFILE*sf = NULL;
SF_INFO sfinfo;
pa_sample_spec ss;
if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
pa_log(__FILE__": Failed to open file %s", fname);
return 0;
}
sf_close(sf);
switch (sfinfo.format & SF_FORMAT_SUBMASK) {
case SF_FORMAT_FLOAT:
case SF_FORMAT_DOUBLE:
/* Only float and double need a special case. */
ss.format = PA_SAMPLE_FLOAT32NE;
break;
default:
/* Everything else is cleanly converted to signed 16 bit. */
ss.format = PA_SAMPLE_S16NE;
break;
}
ss.rate = sfinfo.samplerate;
ss.channels = sfinfo.channels;
if ((pa_frame_size(&ss) * sfinfo.frames) > MAX_FILE_SIZE) {
pa_log(__FILE__": File too large %s", fname);
return 1;
}
return 0;
}
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