static int read_file(struct ausrc_st *st)
{
struct mbuf *mb;
int err;
for (;;) {
mb = mbuf_alloc(4096);
if (!mb)
return ENOMEM;
mb->end = mb->size;
err = aufile_read(st->aufile, mb->buf, &mb->end);
if (err)
break;
if (mb->end == 0) {
info("aufile: end of file\n");
break;
}
aubuf_append(st->aubuf, mb);
mb = mem_deref(mb);
}
info("aufile: loaded %zu bytes\n", aubuf_cur_size(st->aubuf));
mem_deref(mb);
return err;
}
static int read_wav(kiss_fftr_cfg fft, const char *infile)
{
struct aufile *af_in = NULL;
struct aufile_prm prm;
size_t sampc_in_total = 0;
size_t i;
int err;
err = aufile_open(&af_in, &prm, infile, AUFILE_READ);
if (err) {
re_fprintf(stderr, "%s: could not open input file (%m)\n",
infile, err);
goto out;
}
if (prm.fmt != AUFMT_S16LE) {
err = EINVAL;
goto out;
}
re_printf("%s: %u Hz, %d channels\n", infile, prm.srate, prm.channels);
for (;;) {
int16_t sampv[NUM_FFT];
size_t sz = sizeof(sampv);
kiss_fft_cpx freqv[NUM_FREQ];
err = aufile_read(af_in, (void *)sampv, &sz);
if (err || !sz)
break;
if (sz != sizeof(sampv)) {
re_printf("skipping last %zu samples\n", sz);
break;
}
sampc_in_total += (sz/2);
/* do FFT transform */
kiss_fftr(fft, sampv, freqv);
for (i=0; i<ARRAY_SIZE(freqv); i++) {
kiss_fft_cpx cpx = freqv[i];
magv[i] += sqrt(cpx.r * cpx.r + cpx.i * cpx.i);
}
}
re_printf("read %u samples\n", sampc_in_total);
out:
if (err) {
re_fprintf(stderr, "file read error: %m\n", err);
}
mem_deref(af_in);
return err;
}
static int aufile_load(struct mbuf *mb, const char *filename,
uint32_t *srate, uint8_t *channels)
{
struct aufile_prm prm;
struct aufile *af;
int err;
err = aufile_open(&af, &prm, filename, AUFILE_READ);
if (err)
return err;
while (!err) {
uint8_t buf[4096];
size_t i, n;
n = sizeof(buf);
err = aufile_read(af, buf, &n);
if (err || !n)
break;
switch (prm.fmt) {
case AUFMT_S16LE:
err = mbuf_write_mem(mb, buf, n);
break;
case AUFMT_PCMA:
for (i=0; i<n; i++) {
err |= mbuf_write_u16(mb,
g711_alaw2pcm(buf[i]));
}
break;
case AUFMT_PCMU:
for (i=0; i<n; i++) {
err |= mbuf_write_u16(mb,
g711_ulaw2pcm(buf[i]));
}
break;
default:
err = ENOSYS;
break;
}
}
mem_deref(af);
if (!err) {
mb->pos = 0;
*srate = prm.srate;
*channels = prm.channels;
}
return err;
}
static int read_file(struct ausrc_st *st)
{
struct mbuf *mb;
int err;
for (;;) {
uint16_t *sampv;
size_t i;
mb = mbuf_alloc(4096);
if (!mb)
return ENOMEM;
mb->end = mb->size;
err = aufile_read(st->aufile, mb->buf, &mb->end);
if (err)
break;
if (mb->end == 0) {
info("aufile: end of file\n");
break;
}
/* convert from Little-Endian to Native-Endian */
sampv = (void *)mb->buf;
for (i=0; i<mb->end/2; i++) {
sampv[i] = sys_ltohs(sampv[i]);
}
aubuf_append(st->aubuf, mb);
mb = mem_deref(mb);
}
info("aufile: loaded %zu bytes\n", aubuf_cur_size(st->aubuf));
mem_deref(mb);
return err;
}