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/**
* @file sndfile.c Audio dumper using libsndfile
*
* Copyright (C) 2010 Creytiv.com
*/
#include <sndfile.h>
#include <time.h>
#include <re.h>
#include <baresip.h>
/**
* @defgroup sndfile sndfile
*
* Audio filter that writes audio samples to WAV-file
*
* Example Configuration:
\verbatim
snd_path /tmp/
\endverbatim
*/
struct sndfile_enc {
struct aufilt_enc_st af; /* base class */
SNDFILE *enc;
};
struct sndfile_dec {
struct aufilt_dec_st af; /* base class */
SNDFILE *dec;
};
static char file_path[256] = ".";
static int timestamp_print(struct re_printf *pf, const struct tm *tm)
{
if (!tm)
return 0;
return re_hprintf(pf, "%d-%02d-%02d-%02d-%02d-%02d",
1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
}
static void enc_destructor(void *arg)
{
struct sndfile_enc *st = arg;
if (st->enc)
sf_close(st->enc);
list_unlink(&st->af.le);
}
static void dec_destructor(void *arg)
{
struct sndfile_dec *st = arg;
if (st->dec)
sf_close(st->dec);
list_unlink(&st->af.le);
}
static SNDFILE *openfile(const struct aufilt_prm *prm, bool enc)
{
char filename[128];
SF_INFO sfinfo;
time_t tnow = time(0);
struct tm *tm = localtime(&tnow);
SNDFILE *sf;
(void)re_snprintf(filename, sizeof(filename),
"%s/dump-%H-%s.wav",
file_path,
timestamp_print, tm, enc ? "enc" : "dec");
sfinfo.samplerate = prm->srate;
sfinfo.channels = prm->ch;
sfinfo.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
sf = sf_open(filename, SFM_WRITE, &sfinfo);
if (!sf) {
warning("sndfile: could not open: %s\n", filename);
puts(sf_strerror(NULL));
return NULL;
}
info("sndfile: dumping %s audio to %s\n",
enc ? "encode" : "decode", filename);
return sf;
}
static int encode_update(struct aufilt_enc_st **stp, void **ctx,
const struct aufilt *af, struct aufilt_prm *prm)
{
struct sndfile_enc *st;
int err = 0;
(void)ctx;
(void)af;
st = mem_zalloc(sizeof(*st), enc_destructor);
if (!st)
return EINVAL;
st->enc = openfile(prm, true);
if (!st->enc)
err = ENOMEM;
if (err)
mem_deref(st);
else
*stp = (struct aufilt_enc_st *)st;
return err;
}
static int decode_update(struct aufilt_dec_st **stp, void **ctx,
const struct aufilt *af, struct aufilt_prm *prm)
{
struct sndfile_dec *st;
int err = 0;
(void)ctx;
(void)af;
st = mem_zalloc(sizeof(*st), dec_destructor);
if (!st)
return EINVAL;
st->dec = openfile(prm, false);
if (!st->dec)
err = ENOMEM;
if (err)
mem_deref(st);
else
*stp = (struct aufilt_dec_st *)st;
return err;
}
static int encode(struct aufilt_enc_st *st, int16_t *sampv, size_t *sampc)
{
struct sndfile_enc *sf = (struct sndfile_enc *)st;
sf_write_short(sf->enc, sampv, *sampc);
return 0;
}
static int decode(struct aufilt_dec_st *st, int16_t *sampv, size_t *sampc)
{
struct sndfile_dec *sf = (struct sndfile_dec *)st;
sf_write_short(sf->dec, sampv, *sampc);
return 0;
}
static struct aufilt sndfile = {
LE_INIT, "sndfile", encode_update, encode, decode_update, decode
};
static int module_init(void)
{
aufilt_register(&sndfile);
conf_get_str(conf_cur(), "snd_path", file_path, sizeof(file_path));
info("sndfile: saving files in %s\n", file_path);
return 0;
}
static int module_close(void)
{
aufilt_unregister(&sndfile);
return 0;
}
EXPORT_SYM const struct mod_export DECL_EXPORTS(sndfile) = {
"sndfile",
"filter",
module_init,
module_close
};
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