Пример #1
0
/* 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;
}
Пример #2
0
/* 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;
}