/* channel interface for ESS18xx */
static void *
bcmchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
{
struct bcm2835_audio_info *sc = devinfo;
struct bcm2835_audio_chinfo *ch = &sc->pch;
void *buffer;
if (dir == PCMDIR_REC)
return NULL;
ch->parent = sc;
ch->channel = c;
ch->buffer = b;
/* default values */
ch->spd = 44100;
ch->fmt = SND_FORMAT(AFMT_S16_LE, 2, 0);
ch->blksz = VCHIQ_AUDIO_PACKET_SIZE;
buffer = malloc(sc->bufsz, M_DEVBUF, M_WAITOK | M_ZERO);
if (sndbuf_setup(ch->buffer, buffer, sc->bufsz) != 0) {
free(buffer, M_DEVBUF);
return NULL;
}
bcm2835_audio_update_params(sc, ch);
return ch;
}
/* channel interface */
static void *
nmchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
{
struct sc_info *sc = devinfo;
struct sc_chinfo *ch;
u_int32_t chnbuf;
chnbuf = (dir == PCMDIR_PLAY)? sc->pbuf : sc->rbuf;
ch = (dir == PCMDIR_PLAY)? &sc->pch : &sc->rch;
ch->active = 0;
ch->blksize = 0;
ch->wmark = 0;
ch->buffer = b;
sndbuf_setup(ch->buffer, (u_int8_t *)rman_get_virtual(sc->buf) + chnbuf, NM_BUFFSIZE);
if (bootverbose)
device_printf(sc->dev, "%s buf %p\n", (dir == PCMDIR_PLAY)?
"play" : "rec", sndbuf_getbuf(ch->buffer));
ch->parent = sc;
ch->channel = c;
ch->dir = dir;
return ch;
}