static size_t sox_datwrite(sox_format_t * ft, const sox_sample_t *buf, size_t nsamp)
{
priv_t * dat = (priv_t *) ft->priv;
size_t done = 0;
double sampval=0.0;
char s[LINEWIDTH];
size_t i=0;
/* Always write a complete set of channels */
nsamp -= (nsamp % ft->signal.channels);
/* Write time, then sample values, then CRLF newline */
while(done < nsamp) {
sprintf(s," %15.8g ",dat->timevalue);
lsx_writes(ft, s);
for (i=0; i<ft->signal.channels; i++) {
sampval = SOX_SAMPLE_TO_FLOAT_64BIT(*buf++, ft->clips);
sprintf(s," %15.8g", sampval);
lsx_writes(ft, s);
done++;
}
sprintf(s," \r\n");
lsx_writes(ft, s);
dat->timevalue += dat->deltat;
}
return done;
}
static int sox_datstartwrite(sox_format_t * ft)
{
priv_t * dat = (priv_t *) ft->priv;
char s[LINEWIDTH];
dat->timevalue = 0.0;
dat->deltat = 1.0 / (double)ft->signal.rate;
/* Write format comments to start of file */
sprintf(s,"; Sample Rate %ld\015\n", (long)ft->signal.rate);
lsx_writes(ft, s);
sprintf(s,"; Channels %d\015\n", (int)ft->signal.channels);
lsx_writes(ft, s);
return (SOX_SUCCESS);
}
static int write_header(sox_format_t * ft)
{
char buf[128];
uint64_t samples = (ft->olength ? ft->olength : ft->signal.length) / ft->signal.channels;
lsx_writes(ft, "NIST_1A\n");
lsx_writes(ft, " 1024\n");
if (samples) {
sprintf(buf, "sample_count -i %" PRIu64 "\n", samples);
lsx_writes(ft, buf);
}
sprintf(buf, "sample_n_bytes -i %d\n", ft->encoding.bits_per_sample >> 3);
lsx_writes(ft, buf);
sprintf(buf, "channel_count -i %d\n", ft->signal.channels);
lsx_writes(ft, buf);
if (ft->encoding.bits_per_sample == 8)
sprintf(buf, "sample_byte_format -s1 1\n");
else
sprintf(buf, "sample_byte_format -s2 %s\n",
ft->encoding.reverse_bytes != MACHINE_IS_BIGENDIAN ? "10" : "01");
lsx_writes(ft, buf);
sprintf(buf, "sample_rate -i %u\n", (unsigned) (ft->signal.rate + .5));
lsx_writes(ft, buf);
if (ft->encoding.encoding == SOX_ENCODING_ULAW)
lsx_writes(ft, "sample_coding -s4 ulaw\n");
else
lsx_writes(ft, "sample_coding -s3 pcm\n");
lsx_writes(ft, "end_head\n");
lsx_padbytes(ft, 1024 - (size_t)lsx_tell(ft));
return SOX_SUCCESS;
}
static int startwrite(sox_format_t * ft)
{
priv_t * avr = (priv_t *)ft->priv;
int rc;
if (!ft->seekable) {
lsx_fail_errno(ft,SOX_EOF,"AVR: file is not seekable");
return(SOX_EOF);
}
rc = lsx_rawstartwrite (ft);
if (rc)
return rc;
/* magic */
lsx_writes(ft, AVR_MAGIC);
/* name */
lsx_writeb(ft, 0);
lsx_writeb(ft, 0);
lsx_writeb(ft, 0);
lsx_writeb(ft, 0);
lsx_writeb(ft, 0);
lsx_writeb(ft, 0);
lsx_writeb(ft, 0);
lsx_writeb(ft, 0);
/* mono */
if (ft->signal.channels == 1) {
lsx_writew (ft, 0);
}
else if (ft->signal.channels == 2) {
lsx_writew (ft, 0xffff);
}
else {
lsx_fail_errno(ft,SOX_EFMT,"AVR: number of channels not supported");
return(0);
}
/* rez */
if (ft->encoding.bits_per_sample == 8) {
lsx_writew (ft, 8);
}
else if (ft->encoding.bits_per_sample == 16) {
lsx_writew (ft, 16);
}
else {
lsx_fail_errno(ft,SOX_EFMT,"AVR: unsupported sample resolution");
return(SOX_EOF);
}
/* sign */
if (ft->encoding.encoding == SOX_ENCODING_SIGN2) {
lsx_writew (ft, 0xffff);
}
else if (ft->encoding.encoding == SOX_ENCODING_UNSIGNED) {
lsx_writew (ft, 0);
}
else {
lsx_fail_errno(ft,SOX_EFMT,"AVR: unsupported encoding");
return(SOX_EOF);
}
/* loop */
lsx_writew (ft, 0xffff);
/* midi */
lsx_writew (ft, 0xffff);
/* rate */
lsx_writedw(ft, (unsigned)(ft->signal.rate + .5));
/* size */
/* Don't know the size yet. */
lsx_writedw (ft, 0);
/* lbeg */
lsx_writedw (ft, 0);
/* lend */
/* Don't know the size yet, so we can't set lend, either. */
lsx_writedw (ft, 0);
/* res1 */
lsx_writew (ft, 0);
/* res2 */
lsx_writew (ft, 0);
/* res3 */
lsx_writew (ft, 0);
/* ext */
lsx_writebuf(ft, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", sizeof(avr->ext));
/* user */
lsx_writebuf(ft,
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
"\0\0\0\0", sizeof (avr->user));
return(SOX_SUCCESS);
}