30  * convert ``count'' samples from sox encoding to sndio encoding
38   obps = par->bps;  in encode()
39   osigbit = par->sig ? 0 : 1 << (par->bits - 1);  in encode()
40   oshift = 32 - (par->msb ? par->bps * 8 : par->bits);  in encode()
41   if (par->le) {  in encode()
45     odata += par->bps - 1;  in encode()
46     obnext = -1;  in encode()
47     osnext = 2 * par->bps;  in encode()
49   for (; count > 0; count--) {  in encode()
51     for (i = obps; i > 0; i--) {  in encode()
61  * convert ``count'' samples from sndio encoding to sox encoding
69   ibps = par->bps;  in decode()
70   isigbit = par->sig ? 0 : 1 << (par->bits - 1);  in decode()
71   ishift = 32 - (par->msb ? par->bps * 8 : par->bits);  in decode()
72   if (par->le) {  in decode()
73     idata += par->bps - 1;  in decode()
74     ibnext = -1;  in decode()
75     isnext = 2 * par->bps;  in decode()
80   for (; count > 0; count--) {  in decode()
81     for (i = ibps; i > 0; i--) {  in decode()
93   struct sndio_priv *p = (struct sndio_priv *)ft->priv;  in startany()
97   device = ft->filename;  in startany()
101   p->hdl = sio_open(device, mode, 0);  in startany()
102   if (p->hdl == NULL)  in startany()
108   if (ft->signal.rate > 0)  in startany()
109     reqpar.rate = ft->signal.rate;  in startany()
110   if (ft->signal.channels > 0) {  in startany()
112       reqpar.pchan = ft->signal.channels;  in startany()
114       reqpar.rchan = ft->signal.channels;  in startany()
116   switch (ft->encoding.encoding) {  in startany()
126   if (ft->encoding.bits_per_sample > 0)  in startany()
127     reqpar.bits = ft->encoding.bits_per_sample;  in startany()
128   else if (ft->signal.precision > 0)  in startany()
129     reqpar.bits = ft->signal.precision;  in startany()
134   if (ft->encoding.reverse_bytes != sox_option_default) {  in startany()
136     if (ft->encoding.reverse_bytes)  in startany()
139   if (!sio_setpar(p->hdl, &reqpar) ||  in startany()
140       !sio_getpar(p->hdl, &p->par))  in startany()
142   ft->signal.channels = (mode == SIO_PLAY) ? p->par.pchan : p->par.rchan;  in startany()
143   ft->signal.precision = p->par.bits;  in startany()
144   ft->signal.rate = p->par.rate;  in startany()
145   ft->encoding.encoding = p->par.sig ? SOX_ENCODING_SIGN2 : SOX_ENCODING_UNSIGNED;  in startany()
146   ft->encoding.bits_per_sample = p->par.bps * 8;  in startany()
147   ft->encoding.reverse_bytes = SIO_LE_NATIVE ? !p->par.le : p->par.le;  in startany()
148   ft->encoding.reverse_nibbles = sox_option_no;  in startany()
149   ft->encoding.reverse_bits = sox_option_no;  in startany()
151   if (!sio_start(p->hdl))  in startany()
155   sio_close(p->hdl);  in startany()
161   sio_close(((struct sndio_priv *)ft->priv)->hdl);  in stopany()
177   struct sndio_priv *p = (struct sndio_priv *)ft->priv;  in readsamples()
183   todo = len * p->par.bps;  in readsamples()
184   cpb = SNDIO_BUFSZ - (SNDIO_BUFSZ % p->par.bps);  in readsamples()
186     memcpy(p->buf, partial, (size_t)pc);  in readsamples()
187     cc = cpb - pc;  in readsamples()
190     n = sio_read(p->hdl, p->buf + pc, (size_t)cc);  in readsamples()
191     if (n == 0 && sio_eof(p->hdl))  in readsamples()
194     pc = n % p->par.bps;  in readsamples()
195     n -= pc;  in readsamples()
196     memcpy(partial, p->buf + n, (size_t)pc);  in readsamples()
197     decode(&p->par, p->buf, buf, (unsigned)(n / p->par.bps));  in readsamples()
198     buf += n / p->par.bps;  in readsamples()
199     todo -= n;  in readsamples()
201   return len - todo / p->par.bps;  in readsamples()
206   struct sndio_priv *p = (struct sndio_priv *)ft->priv;  in writesamples()
211   spb = SNDIO_BUFSZ / p->par.bps;  in writesamples()
216     encode(&p->par, buf, p->buf, sc);  in writesamples()
217     n = sio_write(p->hdl, p->buf, (size_t)(sc * p->par.bps));  in writesamples()
218     if (n == 0 && sio_eof(p->hdl))  in writesamples()
220     n /= p->par.bps;  in writesamples()
221     todo -= n;  in writesamples()
224   return len - todo;  in writesamples()