mirror of https://github.com/ericonr/sndio.git
1242 lines
29 KiB
C
1242 lines
29 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2010 Jacob Meuser <jakemsr@sdf.lonestar.org>
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* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef USE_ALSA
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <poll.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <values.h>
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#include <alsa/asoundlib.h>
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#include "debug.h"
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#include "sio_priv.h"
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#include "bsd-compat.h"
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#ifdef DEBUG
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static snd_output_t *output = NULL;
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#define DALSA(str, err) fprintf(stderr, "%s: %s\n", str, snd_strerror(err))
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#else
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#define DALSA(str, err) do {} while (0)
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#endif
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struct sio_alsa_hdl {
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struct sio_hdl sio;
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struct sio_par par;
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struct pollfd *pfds;
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snd_pcm_t *opcm;
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snd_pcm_t *ipcm;
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unsigned ibpf, obpf; /* bytes per frame */
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unsigned int osil; /* frames to insert on next write */
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unsigned int idrop; /* frames to discard on next read */
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int iused, oused; /* frames used in hardware fifos */
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int idelta, odelta; /* position reported to client */
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int nfds, infds, onfds;
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int running;
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#ifdef DEBUG
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long long wpos, rpos, cpos;
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#endif
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};
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static void sio_alsa_close(struct sio_hdl *);
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static int sio_alsa_start(struct sio_hdl *);
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static int sio_alsa_stop(struct sio_hdl *);
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static int sio_alsa_setpar(struct sio_hdl *, struct sio_par *);
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static int sio_alsa_getpar(struct sio_hdl *, struct sio_par *);
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static int sio_alsa_getcap(struct sio_hdl *, struct sio_cap *);
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static size_t sio_alsa_read(struct sio_hdl *, void *, size_t);
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static size_t sio_alsa_write(struct sio_hdl *, const void *, size_t);
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static int sio_alsa_nfds(struct sio_hdl *);
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static int sio_alsa_pollfd(struct sio_hdl *, struct pollfd *, int);
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static int sio_alsa_revents(struct sio_hdl *, struct pollfd *);
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static struct sio_ops sio_alsa_ops = {
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sio_alsa_close,
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sio_alsa_setpar,
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sio_alsa_getpar,
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sio_alsa_getcap,
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sio_alsa_write,
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sio_alsa_read,
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sio_alsa_start,
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sio_alsa_stop,
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sio_alsa_nfds,
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sio_alsa_pollfd,
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sio_alsa_revents,
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NULL,
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NULL
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};
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/*
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* convert ALSA format to sio_par encoding
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*/
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static int
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sio_alsa_fmttopar(struct sio_alsa_hdl *hdl, snd_pcm_format_t fmt, struct sio_par *par)
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{
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switch (fmt) {
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case SND_PCM_FORMAT_U8:
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par->bits = 8;
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par->sig = 0;
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break;
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case SND_PCM_FORMAT_S8:
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par->bits = 8;
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par->sig = 1;
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break;
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case SND_PCM_FORMAT_S16_LE:
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par->bits = 16;
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par->sig = 1;
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par->le = 1;
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break;
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case SND_PCM_FORMAT_S16_BE:
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par->bits = 16;
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par->sig = 1;
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par->le = 0;
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break;
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case SND_PCM_FORMAT_U16_LE:
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par->bits = 16;
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par->sig = 0;
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par->le = 1;
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break;
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case SND_PCM_FORMAT_U16_BE:
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par->bits = 16;
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par->sig = 0;
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par->le = 0;
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break;
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case SND_PCM_FORMAT_S24_LE:
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par->bits = 24;
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par->sig = 1;
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par->le = 1;
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break;
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case SND_PCM_FORMAT_S24_BE:
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par->bits = 24;
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par->sig = 1;
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par->le = 0;
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break;
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case SND_PCM_FORMAT_U24_LE:
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par->bits = 24;
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par->sig = 0;
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par->le = 1;
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break;
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case SND_PCM_FORMAT_U24_BE:
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par->bits = 24;
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par->sig = 0;
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par->le = 0;
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break;
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default:
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DPRINTF("sio_alsa_fmttopar: 0x%x: unsupported format\n", fmt);
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hdl->sio.eof = 1;
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return 0;
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}
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par->msb = 1;
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par->bps = SIO_BPS(par->bits);
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return 1;
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}
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/*
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* convert sio_par encoding to ALSA format
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*/
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static void
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sio_alsa_enctofmt(struct sio_alsa_hdl *hdl, snd_pcm_format_t *rfmt, struct sio_par *enc)
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{
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if (enc->bits == 8) {
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if (enc->sig == ~0U || !enc->sig)
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*rfmt = SND_PCM_FORMAT_U8;
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else
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*rfmt = SND_PCM_FORMAT_S8;
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} else if (enc->bits == 16) {
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if (enc->sig == ~0U || enc->sig) {
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if (enc->le == ~0U) {
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*rfmt = SIO_LE_NATIVE ?
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SND_PCM_FORMAT_S16_LE :
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SND_PCM_FORMAT_S16_BE;
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} else if (enc->le)
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*rfmt = SND_PCM_FORMAT_S16_LE;
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else
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*rfmt = SND_PCM_FORMAT_S16_BE;
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} else {
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if (enc->le == ~0U) {
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*rfmt = SIO_LE_NATIVE ?
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SND_PCM_FORMAT_U16_LE :
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SND_PCM_FORMAT_U16_BE;
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} else if (enc->le)
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*rfmt = SND_PCM_FORMAT_U16_LE;
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else
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*rfmt = SND_PCM_FORMAT_U16_BE;
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}
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} else if (enc->bits == 24) {
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if (enc->sig == ~0U || enc->sig) {
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if (enc->le == ~0U) {
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*rfmt = SIO_LE_NATIVE ?
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SND_PCM_FORMAT_S24_LE :
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SND_PCM_FORMAT_S24_BE;
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} else if (enc->le)
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*rfmt = SND_PCM_FORMAT_S24_LE;
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else
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*rfmt = SND_PCM_FORMAT_S24_BE;
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} else {
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if (enc->le == ~0U) {
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*rfmt = SIO_LE_NATIVE ?
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SND_PCM_FORMAT_U24_LE :
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SND_PCM_FORMAT_U24_BE;
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} else if (enc->le)
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*rfmt = SND_PCM_FORMAT_U24_LE;
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else
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*rfmt = SND_PCM_FORMAT_U24_BE;
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}
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} else {
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*rfmt = SIO_LE_NATIVE ?
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SND_PCM_FORMAT_S16_LE : SND_PCM_FORMAT_S16_BE;
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}
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}
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/*
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* guess device capabilities
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*/
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static int
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sio_alsa_getcap(struct sio_hdl *sh, struct sio_cap *cap)
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{
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struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
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DPRINTF("sio_alsa_getcap: not implemented\n");
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hdl->sio.eof = 1;
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return 0;
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}
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struct sio_hdl *
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sio_alsa_open(const char *str, unsigned mode, int nbio)
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{
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struct sio_alsa_hdl *hdl;
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char path[PATH_MAX];
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struct sio_par par;
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int err;
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switch (*str) {
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case '/':
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case ':': /* XXX: for backward compat */
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str++;
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break;
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default:
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DPRINTF("sio_sun_open: %s: '/<devnum>' expected\n", str);
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return NULL;
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}
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hdl = malloc(sizeof(struct sio_alsa_hdl));
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if (hdl == NULL)
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return NULL;
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sio_create(&hdl->sio, &sio_alsa_ops, mode, nbio);
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#ifdef DEBUG
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err = snd_output_stdio_attach(&output, stderr, 0);
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if (err < 0)
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DALSA("couldn't attach to stderr", err);
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#endif
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snprintf(path, sizeof(path), "hw:%s", str);
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if (mode & SIO_PLAY) {
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err = snd_pcm_open(&hdl->opcm, path,
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SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
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if (err < 0) {
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DALSA("couldn't open play stream", err);
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goto bad_free;
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}
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}
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if (mode & SIO_REC) {
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err = snd_pcm_open(&hdl->ipcm, path,
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SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
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if (err < 0) {
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DALSA("couldn't open rec stream", err);
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goto bad_free_opcm;
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}
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}
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hdl->nfds = SIO_MAXNFDS;
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hdl->pfds = malloc(sizeof(struct pollfd) * hdl->nfds);
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if (hdl->pfds == NULL) {
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DPERROR("couldn't allocate pollfd structures");
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goto bad_free_ipcm;
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}
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DPRINTF("mode = %d, allocated %d descriptors\n", mode, hdl->nfds);
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/*
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* Default parameters may not be compatible with libsndio (eg. mulaw
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* encodings, different playback and recording parameters, etc...), so
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* set parameters to a random value. If the requested parameters are
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* not supported by the device, then sio_setpar() will pick supported
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* ones.
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*/
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sio_initpar(&par);
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par.bits = 16;
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par.le = SIO_LE_NATIVE;
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par.rate = 48000;
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if (mode & SIO_PLAY)
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par.pchan = 2;
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if (mode & SIO_REC)
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par.rchan = 2;
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if (!sio_setpar(&hdl->sio, &par))
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goto bad_free_ipcm;
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return (struct sio_hdl *)hdl;
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bad_free_ipcm:
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if (mode & SIO_REC)
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snd_pcm_close(hdl->ipcm);
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bad_free_opcm:
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if (mode & SIO_PLAY)
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snd_pcm_close(hdl->opcm);
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bad_free:
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free(hdl);
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return NULL;
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}
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static void
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sio_alsa_close(struct sio_hdl *sh)
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{
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struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
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if (hdl->sio.mode & SIO_PLAY)
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snd_pcm_close(hdl->opcm);
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if (hdl->sio.mode & SIO_REC)
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snd_pcm_close(hdl->ipcm);
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free(hdl);
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}
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#ifdef DEBUG
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void
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sio_alsa_printpos(struct sio_alsa_hdl *hdl, int delta)
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{
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long long rpos, rdiff;
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long long cpos, cdiff;
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long long wpos, wdiff;
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cdiff = hdl->cpos % hdl->par.round;
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cpos = hdl->cpos / hdl->par.round;
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if (cdiff > hdl->par.round / 2) {
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cpos++;
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cdiff = cdiff - hdl->par.round;
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}
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rdiff = hdl->rpos % hdl->par.round;
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rpos = hdl->rpos / hdl->par.round;
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if (rdiff > hdl->par.round / 2) {
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rpos++;
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rdiff = rdiff - hdl->par.round;
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}
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wdiff = hdl->wpos % hdl->par.round;
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wpos = hdl->wpos / hdl->par.round;
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if (wdiff > hdl->par.round / 2) {
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wpos++;
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wdiff = wdiff - hdl->par.round;
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}
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fprintf(stderr,
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"clk: %+4lld %+4lld, wr %+4lld %+4lld rd: %+4lld %+4lld\n",
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cpos, cdiff, wpos, wdiff, rpos, rdiff);
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}
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#endif
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static int
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sio_alsa_start(struct sio_hdl *sh)
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{
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struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
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int err;
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DPRINTF("sio_alsa_start:\n");
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hdl->ibpf = hdl->par.rchan * hdl->par.bps;
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hdl->obpf = hdl->par.pchan * hdl->par.bps;
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hdl->iused = 0;
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hdl->oused = 0;
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hdl->idelta = 0;
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hdl->odelta = -hdl->par.bufsz;
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hdl->infds = 0;
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hdl->onfds = 0;
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hdl->osil = 0;
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hdl->idrop = 0;
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hdl->running = 0;
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#ifdef DEBUG
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hdl->cpos = hdl->rpos = hdl->wpos = 0;
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#endif
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if (hdl->sio.mode & SIO_PLAY) {
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err = snd_pcm_prepare(hdl->opcm);
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if (err < 0) {
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DALSA("couldn't prepare play stream", err);
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hdl->sio.eof = 1;
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return 0;
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}
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}
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if (hdl->sio.mode & SIO_REC) {
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err = snd_pcm_prepare(hdl->ipcm);
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if (err < 0) {
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DALSA("couldn't prepare rec stream", err);
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hdl->sio.eof = 1;
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return 0;
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}
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}
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if ((hdl->sio.mode & SIO_PLAY) && (hdl->sio.mode & SIO_REC)) {
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err = snd_pcm_link(hdl->ipcm, hdl->opcm);
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if (err < 0) {
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DALSA("couldn't link streams", err);
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hdl->sio.eof = 1;
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return 0;
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}
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}
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if (!(hdl->sio.mode & SIO_PLAY)) {
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err = snd_pcm_start(hdl->ipcm);
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if (err < 0) {
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DALSA("couldn't start rec stream", err);
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hdl->sio.eof = 1;
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return 0;
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}
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}
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#ifdef DEBUG
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if (sndio_debug) {
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if (hdl->sio.mode & SIO_REC)
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snd_pcm_dump(hdl->ipcm, output);
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if (hdl->sio.mode & SIO_PLAY)
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snd_pcm_dump(hdl->opcm, output);
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}
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#endif
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return 1;
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}
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|
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static int
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sio_alsa_stop(struct sio_hdl *sh)
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{
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struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
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int err;
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|
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if (hdl->sio.mode & SIO_PLAY) {
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err = snd_pcm_drop(hdl->opcm);
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if (err < 0) {
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DALSA("couldn't stop play stream", err);
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hdl->sio.eof = 1;
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return 0;
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}
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}
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if (hdl->sio.mode & SIO_REC) {
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err = snd_pcm_drop(hdl->ipcm);
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if (err < 0) {
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DALSA("couldn't stop rec stream", err);
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hdl->sio.eof = 1;
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return 0;
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}
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}
|
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if ((hdl->sio.mode & SIO_PLAY) && (hdl->sio.mode & SIO_REC)) {
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err = snd_pcm_unlink(hdl->ipcm);
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if (err < 0) {
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DALSA("couldn't unlink streams", err);
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hdl->sio.eof = 1;
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return 0;
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}
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}
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DPRINTF("stopped");
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return 1;
|
|
}
|
|
|
|
static int
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sio_alsa_xrun(struct sio_alsa_hdl *hdl)
|
|
{
|
|
int wdiff, cdiff, rdiff, offs;
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fprintf(stderr, "xrun: stop ");
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sio_alsa_printpos(hdl, 0);
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cdiff = hdl->par.round - (hdl->cpos % hdl->par.round);
|
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if (cdiff == hdl->par.round)
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cdiff = 0;
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if (cdiff > 0) {
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hdl->cpos += cdiff;
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sio_onmove_cb(&hdl->sio, cdiff);
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}
|
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|
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fprintf(stderr, "xrun: tick ");
|
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sio_alsa_printpos(hdl, 0);
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|
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if (hdl->sio.mode & SIO_PLAY) {
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wdiff = hdl->wpos - hdl->cpos;
|
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if (hdl->sio.mode & SIO_REC)
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offs = hdl->wpos - hdl->rpos;
|
|
} else {
|
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rdiff = hdl->par.bufsz - (hdl->cpos - hdl->rpos);
|
|
}
|
|
|
|
if (!sio_alsa_stop(&hdl->sio))
|
|
return 0;
|
|
if (!sio_alsa_start(&hdl->sio))
|
|
return 0;
|
|
hdl->running = 1;
|
|
|
|
if (hdl->sio.mode & SIO_PLAY) {
|
|
if (hdl->sio.mode & SIO_REC) {
|
|
while (wdiff < offs) {
|
|
wdiff += hdl->par.round;
|
|
hdl->odelta -= hdl->par.round;
|
|
hdl->cpos += hdl->par.round;
|
|
}
|
|
}
|
|
fprintf(stderr, "xrun: inserting silence: %d\n", wdiff);
|
|
hdl->osil = wdiff;
|
|
if (hdl->sio.mode & SIO_REC)
|
|
hdl->idrop = wdiff - offs;
|
|
} else {
|
|
while (rdiff > (int)hdl->par.bufsz) {
|
|
rdiff -= hdl->par.round;
|
|
hdl->idelta -= hdl->par.round;
|
|
hdl->cpos += hdl->par.round;
|
|
}
|
|
fprintf(stderr, "xrun: dropping: %d\n", rdiff);
|
|
hdl->idrop = rdiff;
|
|
}
|
|
fprintf(stderr, "xrun: osil = %d, idrop = %d\n", hdl->osil, hdl->idrop);
|
|
fprintf(stderr, "xrun: corr ");
|
|
sio_alsa_printpos(hdl, 0);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
sio_alsa_setpar(struct sio_hdl *sh, struct sio_par *par)
|
|
{
|
|
struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
|
|
snd_pcm_hw_params_t *ohwp, *ihwp;
|
|
snd_pcm_sw_params_t *oswp, *iswp;
|
|
snd_pcm_uframes_t iround, oround, ibufsz, obufsz;
|
|
snd_pcm_format_t ifmt, ofmt;
|
|
unsigned bufsz, round, periods;
|
|
unsigned irate, orate, req_rate;
|
|
unsigned ich, och;
|
|
int err, dir;
|
|
|
|
snd_pcm_hw_params_malloc(&ohwp);
|
|
snd_pcm_sw_params_malloc(&oswp);
|
|
snd_pcm_hw_params_malloc(&ihwp);
|
|
snd_pcm_sw_params_malloc(&iswp);
|
|
|
|
/*
|
|
* set encoding
|
|
*/
|
|
sio_alsa_enctofmt(hdl, &ofmt, par);
|
|
DPRINTF("ofmt = %u\n", ofmt);
|
|
if (hdl->sio.mode & SIO_PLAY) {
|
|
err = snd_pcm_hw_params_any(hdl->opcm, ohwp);
|
|
if (err < 0) {
|
|
DALSA("couldn't init play pars", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_access(hdl->opcm, ohwp,
|
|
SND_PCM_ACCESS_RW_INTERLEAVED);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play access", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_format(hdl->opcm, ohwp, ofmt);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play fmt", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_get_format(ohwp, &ofmt);
|
|
if (err < 0) {
|
|
DALSA("couldn't get play fmt", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
ifmt = ofmt;
|
|
if (hdl->sio.mode & SIO_REC) {
|
|
err = snd_pcm_hw_params_any(hdl->ipcm, ihwp);
|
|
if (err < 0) {
|
|
DALSA("couldn't init rec pars", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_access(hdl->ipcm, ihwp,
|
|
SND_PCM_ACCESS_RW_INTERLEAVED);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec access", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_format(hdl->ipcm, ihwp, ifmt);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec fmt", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_get_format(ihwp, &ifmt);
|
|
if (err < 0) {
|
|
DALSA("couldn't get play fmt", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
if (!(hdl->sio.mode & SIO_PLAY))
|
|
ofmt = ifmt;
|
|
}
|
|
if (ifmt != ofmt) {
|
|
DPRINTF("play and rec formats differ\n");
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
if (!sio_alsa_fmttopar(hdl, ofmt, &hdl->par))
|
|
return 0;
|
|
|
|
/*
|
|
* set rate
|
|
*/
|
|
orate = (par->rate == ~0U) ? 48000 : par->rate;
|
|
if (hdl->sio.mode & SIO_PLAY) {
|
|
err = snd_pcm_hw_params_set_rate_resample(hdl->opcm, ohwp, 0);
|
|
if (err < 0) {
|
|
DALSA("couldn't turn play resampling off", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_rate_near(hdl->opcm,
|
|
ohwp, &orate, 0);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play rate", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
irate = orate;
|
|
if (hdl->sio.mode & SIO_REC) {
|
|
err = snd_pcm_hw_params_set_rate_resample(hdl->ipcm, ihwp, 0);
|
|
if (err < 0) {
|
|
DALSA("couldn't turn rec resampling off", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_rate_near(hdl->ipcm,
|
|
ihwp, &irate, 0);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec rate", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
if (!(hdl->sio.mode & SIO_PLAY))
|
|
orate = irate;
|
|
}
|
|
if (irate != orate) {
|
|
DPRINTF("could not get matching play/record rate");
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
hdl->par.rate = orate;
|
|
|
|
/*
|
|
* set number of channels
|
|
*/
|
|
if ((hdl->sio.mode & SIO_PLAY) && par->pchan != ~0U) {
|
|
och = par->pchan;
|
|
err = snd_pcm_hw_params_set_channels_near(hdl->opcm,
|
|
ohwp, &och);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play channel count", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
hdl->par.pchan = och;
|
|
}
|
|
if ((hdl->sio.mode & SIO_REC) && par->rchan != ~0U) {
|
|
ich = par->rchan;
|
|
err = snd_pcm_hw_params_set_channels_near(hdl->ipcm,
|
|
ihwp, &ich);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec channel count", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
hdl->par.rchan = ich;
|
|
}
|
|
|
|
/*
|
|
* If the rate that the hardware is using is different than
|
|
* the requested rate, scale buffer sizes so they will be the
|
|
* same time duration as what was requested. This just gets
|
|
* the rates to use for scaling, that actual scaling is done
|
|
* later.
|
|
*/
|
|
req_rate = (par->rate != ~0U) ? par->rate : hdl->par.rate;
|
|
DPRINTF("req_rate = %u, orate = %u\n", req_rate, orate);
|
|
|
|
/*
|
|
* if block size and buffer size are not both set then
|
|
* set the blocksize to half the buffer size
|
|
*/
|
|
bufsz = par->appbufsz;
|
|
round = par->round;
|
|
if (bufsz != ~0U) {
|
|
bufsz = bufsz * orate / req_rate;
|
|
bufsz = (bufsz + 63) & ~63;
|
|
if (round == ~0U)
|
|
round = bufsz / 2;
|
|
else {
|
|
round = round * orate / req_rate;
|
|
round = (bufsz + 31) & ~31;
|
|
bufsz += round - 1;
|
|
bufsz -= bufsz % round;
|
|
}
|
|
} else if (round != ~0U) {
|
|
round = round * orate / req_rate;
|
|
round = (bufsz + 31) & ~31;
|
|
bufsz = round * 2;
|
|
} else {
|
|
round = orate / 100;
|
|
round = (round + 31) & ~31;
|
|
bufsz = round * 2;
|
|
}
|
|
|
|
DPRINTF("sio_alsa_setpar: trying bufsz = %u, round = %u\n", bufsz, round);
|
|
oround = round;
|
|
if (hdl->sio.mode & SIO_PLAY) {
|
|
err = snd_pcm_hw_params_set_period_size_integer(hdl->opcm, ohwp);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play period to integer", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_period_size_near(hdl->opcm, ohwp, &oround, &dir);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play period size failed", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
iround = oround;
|
|
if (hdl->sio.mode & SIO_REC) {
|
|
err = snd_pcm_hw_params_set_period_size_integer(hdl->ipcm, ihwp);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec period to integer", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_period_size_near(hdl->ipcm,
|
|
ihwp, &iround, NULL);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec period size failed", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
if (!(hdl->sio.mode & SIO_PLAY))
|
|
oround = iround;
|
|
}
|
|
if (iround != oround) {
|
|
DPRINTF("could not get matching play/record period size");
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
hdl->par.round = oround;
|
|
|
|
/*
|
|
* make sure we've at least two periods
|
|
*/
|
|
periods = bufsz / round;
|
|
if (periods < 2)
|
|
periods = 2;
|
|
bufsz = hdl->par.round * periods;
|
|
|
|
obufsz = bufsz;
|
|
if (hdl->sio.mode & SIO_PLAY) {
|
|
err = snd_pcm_hw_params_set_periods_integer(hdl->opcm, ohwp);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play periods to integer", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_buffer_size_near(hdl->opcm,
|
|
ohwp, &obufsz);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play buffer size", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
ibufsz = obufsz;
|
|
if (hdl->sio.mode & SIO_REC) {
|
|
err = snd_pcm_hw_params_set_periods_integer(hdl->ipcm, ihwp);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec periods to integer", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_hw_params_set_buffer_size_near(hdl->ipcm,
|
|
ihwp, &ibufsz);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec buffer size", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
if (!(hdl->sio.mode & SIO_PLAY))
|
|
ibufsz = obufsz;
|
|
}
|
|
if (ibufsz != obufsz) {
|
|
DPRINTF("could not get matching play/record buffer size");
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
hdl->par.appbufsz = hdl->par.bufsz = obufsz;
|
|
|
|
DPRINTF("sio_alsa_setpar: got bufsz = %u, round = %u\n",
|
|
hdl->par.bufsz, hdl->par.round);
|
|
|
|
/* commit hardware params */
|
|
|
|
if (hdl->sio.mode & SIO_PLAY) {
|
|
err = snd_pcm_hw_params(hdl->opcm, ohwp);
|
|
if (err < 0) {
|
|
DALSA("couldn't commit play params", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
if (hdl->sio.mode & SIO_REC) {
|
|
err = snd_pcm_hw_params(hdl->ipcm, ihwp);
|
|
if (err < 0) {
|
|
DALSA("couldn't commit rec params failed", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* software params */
|
|
|
|
if (hdl->sio.mode & SIO_PLAY) {
|
|
err = snd_pcm_sw_params_current(hdl->opcm, oswp);
|
|
if (err < 0) {
|
|
DALSA("couldn't get current play params", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params_set_start_threshold(hdl->opcm,
|
|
oswp, hdl->par.bufsz);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play start threshold", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params_set_stop_threshold(hdl->opcm,
|
|
oswp, hdl->par.bufsz);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play stop threshold", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params_set_avail_min(hdl->opcm,
|
|
oswp, hdl->par.round);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play avail min", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params_set_period_event(hdl->opcm, oswp, 1);
|
|
if (err < 0) {
|
|
DALSA("couldn't set play period event", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params(hdl->opcm, oswp);
|
|
if (err < 0) {
|
|
DALSA("couldn't commit play sw params", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (hdl->sio.mode & SIO_REC) {
|
|
err = snd_pcm_sw_params_current(hdl->ipcm, iswp);
|
|
if (err < 0) {
|
|
DALSA("couldn't get current rec params", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params_set_start_threshold(hdl->ipcm,
|
|
iswp, 0);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec start threshold", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params_set_stop_threshold(hdl->ipcm,
|
|
iswp, hdl->par.bufsz);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec stop threshold", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params_set_avail_min(hdl->ipcm,
|
|
iswp, hdl->par.round);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec avail min", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params_set_period_event(hdl->ipcm, iswp, 1);
|
|
if (err < 0) {
|
|
DALSA("couldn't set rec period event", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_sw_params(hdl->ipcm, iswp);
|
|
if (err < 0) {
|
|
DALSA("couldn't commit rec sw params", err);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
DPRINTF("sio_alsa_setpar: done\n");
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
sio_alsa_getpar(struct sio_hdl *sh, struct sio_par *par)
|
|
{
|
|
struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
|
|
|
|
*par = hdl->par;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* drop recorded samples to compensate xruns
|
|
*/
|
|
static int
|
|
sio_alsa_rdrop(struct sio_alsa_hdl *hdl)
|
|
{
|
|
#define DROP_NMAX 0x1000
|
|
static char buf[DROP_NMAX];
|
|
ssize_t n, todo, max;
|
|
|
|
max = DROP_NMAX / hdl->ibpf;
|
|
while (hdl->idrop > 0) {
|
|
todo = hdl->idrop;
|
|
if (todo > max)
|
|
todo = max;
|
|
while ((n = snd_pcm_readi(hdl->ipcm, buf, todo)) < 0) {
|
|
if (n == -EINTR)
|
|
continue;
|
|
if (n == -EPIPE && sio_alsa_xrun(hdl))
|
|
continue;
|
|
if (n != -EAGAIN) {
|
|
DALSA("couldn't read data to drop", n);
|
|
hdl->sio.eof = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
if (n == 0) {
|
|
DPRINTF("sio_alsa_rdrop: eof\n");
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
hdl->idrop -= n;
|
|
#ifdef DEBUG
|
|
hdl->rpos += n;
|
|
#endif
|
|
hdl->idelta += n;
|
|
DPRINTF("sio_alsa_rdrop: dropped %ld/%ld frames\n", n, todo);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static size_t
|
|
sio_alsa_read(struct sio_hdl *sh, void *buf, size_t len)
|
|
{
|
|
struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
|
|
snd_pcm_sframes_t n;
|
|
snd_pcm_uframes_t todo;
|
|
|
|
todo = len / hdl->ibpf;
|
|
while ((n = snd_pcm_readi(hdl->ipcm, buf, todo)) < 0) {
|
|
if (n == -EINTR)
|
|
continue;
|
|
if (n == -EPIPE && sio_alsa_xrun(hdl))
|
|
continue;
|
|
if (n != -EAGAIN) {
|
|
DALSA("couldn't read data", n);
|
|
hdl->sio.eof = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
if (n == 0) {
|
|
DPRINTF("sio_alsa_read: eof\n");
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
#ifdef DEBUG
|
|
hdl->rpos += n;
|
|
#endif
|
|
hdl->idelta += n;
|
|
n *= hdl->ibpf;
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* insert silence to play to compensate xruns
|
|
*/
|
|
static int
|
|
sio_alsa_wsil(struct sio_alsa_hdl *hdl)
|
|
{
|
|
#define ZERO_NMAX 0x1000
|
|
static char zero[ZERO_NMAX];
|
|
ssize_t n, todo, max;
|
|
|
|
max = ZERO_NMAX / hdl->obpf;
|
|
while (hdl->osil > 0) {
|
|
todo = hdl->osil;
|
|
if (todo > max)
|
|
todo = max;
|
|
while ((n = snd_pcm_writei(hdl->opcm, zero, todo)) < 0) {
|
|
if (n == -EINTR)
|
|
continue;
|
|
if (n == -ESTRPIPE && sio_alsa_xrun(hdl))
|
|
continue;
|
|
if (n != -EAGAIN) {
|
|
DALSA("couldn't write silence", n);
|
|
hdl->sio.eof = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
#ifdef DEBUG
|
|
hdl->wpos += n;
|
|
#endif
|
|
hdl->odelta += n;
|
|
hdl->osil -= n;
|
|
DPRINTF("sio_alsa_wsil: inserted %ld/%ld frames\n", n, todo);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static size_t
|
|
sio_alsa_write(struct sio_hdl *sh, const void *buf, size_t len)
|
|
{
|
|
struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
|
|
ssize_t n, todo;
|
|
|
|
if (!sio_alsa_wsil(hdl))
|
|
return 0;
|
|
if (len < hdl->obpf) {
|
|
/*
|
|
* we can't just return, because sio_write() will loop
|
|
* forever. Fix this by saving partial samples in a
|
|
* temporary buffer.
|
|
*/
|
|
fprintf(stderr, "sio_alsa_write: wrong chunk size\n");
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
todo = len / hdl->obpf;
|
|
DPRINTF("sio_alsa_write: len = %zd, todo = %zd\n", len, todo);
|
|
while ((n = snd_pcm_writei(hdl->opcm, buf, todo)) < 0) {
|
|
if (n == -EINTR)
|
|
continue;
|
|
if ((n == -ESTRPIPE || n == -EPIPE) && sio_alsa_xrun(hdl))
|
|
continue;
|
|
if (n != -EAGAIN) {
|
|
DALSA("couldn't write data", n);
|
|
hdl->sio.eof = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
DPRINTF("wrote %zd\n", n);
|
|
#ifdef DEBUG
|
|
hdl->wpos += n;
|
|
#endif
|
|
hdl->odelta += n;
|
|
n *= hdl->obpf;
|
|
return n;
|
|
}
|
|
|
|
static int
|
|
sio_alsa_nfds(struct sio_hdl *sh)
|
|
{
|
|
struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
|
|
|
|
return hdl->nfds;
|
|
}
|
|
|
|
static int
|
|
sio_alsa_pollfd(struct sio_hdl *sh, struct pollfd *pfd, int events)
|
|
{
|
|
struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
|
|
|
|
if (hdl->sio.eof)
|
|
return 0;
|
|
|
|
memset(pfd, 0, sizeof(struct pollfd) * hdl->nfds);
|
|
if ((hdl->sio.mode & SIO_PLAY) && hdl->sio.started) {
|
|
if (!hdl->running &&
|
|
snd_pcm_state(hdl->opcm) == SND_PCM_STATE_RUNNING) {
|
|
hdl->running = 1;
|
|
sio_onmove_cb(&hdl->sio, 0);
|
|
}
|
|
hdl->onfds = snd_pcm_poll_descriptors(hdl->opcm,
|
|
pfd, hdl->nfds);
|
|
if (hdl->onfds < 0) {
|
|
DALSA("couldn't poll play descriptors", hdl->onfds);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
} else
|
|
hdl->onfds = 0;
|
|
if ((hdl->sio.mode & SIO_REC) && hdl->sio.started) {
|
|
if (!hdl->running &&
|
|
snd_pcm_state(hdl->ipcm) == SND_PCM_STATE_RUNNING) {
|
|
hdl->running = 1;
|
|
sio_onmove_cb(&hdl->sio, 0);
|
|
}
|
|
hdl->infds = snd_pcm_poll_descriptors(hdl->ipcm,
|
|
pfd + hdl->onfds, hdl->nfds - hdl->onfds);
|
|
if (hdl->infds < 0) {
|
|
DALSA("couldn't poll rec descriptors", hdl->infds);
|
|
hdl->sio.eof = 1;
|
|
return 0;
|
|
}
|
|
} else
|
|
hdl->infds = 0;
|
|
DPRINTF("sio_alsa_pollfd: events = %x, nfds = %d + %d\n",
|
|
events, hdl->onfds, hdl->infds);
|
|
#if 0
|
|
for (i = 0; i < hdl->onfds + hdl->infds; i++) {
|
|
DPRINTF("sio_alsa_pollfd: pfds[%d].events = %x\n",
|
|
i, pfd[i].events);
|
|
}
|
|
#endif
|
|
return hdl->onfds + hdl->infds;
|
|
}
|
|
|
|
int
|
|
sio_alsa_revents(struct sio_hdl *sh, struct pollfd *pfd)
|
|
{
|
|
struct sio_alsa_hdl *hdl = (struct sio_alsa_hdl *)sh;
|
|
snd_pcm_sframes_t iused, oavail, oused;
|
|
snd_pcm_state_t istate, ostate;
|
|
int nfds;
|
|
unsigned short revents, r;
|
|
int err;
|
|
|
|
if (hdl->sio.eof)
|
|
return POLLHUP;
|
|
#if 0
|
|
int i
|
|
|
|
for (i = 0; i < hdl->onfds + hdl->infds; i++) {
|
|
DPRINTF("sio_alsa_revents: pfds[%d].events = %x\n",
|
|
i, pfd[i].revents);
|
|
}
|
|
#endif
|
|
|
|
revents = nfds = 0;
|
|
if (hdl->sio.mode & SIO_PLAY) {
|
|
ostate = snd_pcm_state(hdl->opcm);
|
|
if (ostate == SND_PCM_STATE_XRUN) {
|
|
if (!sio_alsa_xrun(hdl))
|
|
return POLLHUP;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_poll_descriptors_revents(hdl->opcm, pfd, hdl->onfds, &r);
|
|
if (err < 0) {
|
|
DALSA("couldn't get play events", err);
|
|
hdl->sio.eof = 1;
|
|
return POLLHUP;
|
|
}
|
|
revents |= r;
|
|
nfds += hdl->onfds;
|
|
}
|
|
if (hdl->sio.mode & SIO_REC) {
|
|
istate = snd_pcm_state(hdl->ipcm);
|
|
if (istate == SND_PCM_STATE_XRUN) {
|
|
if (!sio_alsa_xrun(hdl))
|
|
return POLLHUP;
|
|
return 0;
|
|
}
|
|
err = snd_pcm_poll_descriptors_revents(hdl->ipcm, pfd + nfds, hdl->infds, &r);
|
|
if (err < 0) {
|
|
DALSA("couldn't get rec events", err);
|
|
hdl->sio.eof = 1;
|
|
return POLLHUP;
|
|
}
|
|
revents |= r;
|
|
nfds += hdl->infds;
|
|
}
|
|
DPRINTF("sio_alsa_revents: revents = %x\n", revents);
|
|
if ((revents & POLLOUT) && (hdl->sio.mode & SIO_PLAY) &&
|
|
(ostate == SND_PCM_STATE_RUNNING ||
|
|
ostate == SND_PCM_STATE_PREPARED)) {
|
|
oavail = snd_pcm_avail_update(hdl->opcm);
|
|
if (oavail < 0) {
|
|
if (oavail == -EPIPE) {
|
|
if (!sio_alsa_xrun(hdl))
|
|
return POLLHUP;
|
|
return 0;
|
|
}
|
|
DALSA("couldn't get play buffer pointer", oavail);
|
|
hdl->sio.eof = 1;
|
|
return POLLHUP;
|
|
}
|
|
oused = hdl->par.bufsz - oavail;
|
|
hdl->odelta += oused - hdl->oused;
|
|
hdl->oused = oused;
|
|
while (hdl->odelta > 0) {
|
|
#ifdef DEBUG
|
|
hdl->cpos += hdl->odelta;
|
|
if (sndio_debug)
|
|
sio_alsa_printpos(hdl, hdl->odelta);
|
|
#endif
|
|
sio_onmove_cb(&hdl->sio, hdl->odelta);
|
|
hdl->odelta = 0;
|
|
}
|
|
}
|
|
if ((revents & POLLIN) && !(hdl->sio.mode & SIO_PLAY) &&
|
|
(istate == SND_PCM_STATE_RUNNING ||
|
|
istate == SND_PCM_STATE_PREPARED)) {
|
|
iused = snd_pcm_avail_update(hdl->ipcm);
|
|
if (iused < 0) {
|
|
if (iused == -EPIPE) {
|
|
if (!sio_alsa_xrun(hdl))
|
|
return POLLHUP;
|
|
return 0;
|
|
}
|
|
DALSA("couldn't get rec buffer pointer", iused);
|
|
hdl->sio.eof = 1;
|
|
return POLLHUP;
|
|
}
|
|
hdl->idelta += iused - hdl->iused;
|
|
hdl->iused = iused;
|
|
if (hdl->idelta > 0) {
|
|
#ifdef DEBUG
|
|
hdl->cpos += hdl->idelta;
|
|
if (sndio_debug)
|
|
sio_onmove_cb(&hdl->sio, hdl->idelta);
|
|
#endif
|
|
hdl->idelta = 0;
|
|
}
|
|
}
|
|
if ((hdl->sio.mode & SIO_PLAY) && !sio_alsa_wsil(hdl))
|
|
revents &= ~POLLOUT;
|
|
if ((hdl->sio.mode & SIO_REC) && !sio_alsa_rdrop(hdl))
|
|
revents &= ~POLLIN;
|
|
return revents;
|
|
}
|
|
#endif /* defined USE_ALSA */
|