mirror of
https://github.com/ericonr/sndio.git
synced 2024-02-18 04:45:21 -06:00
1173 lines
26 KiB
C
1173 lines
26 KiB
C
/* $OpenBSD$ */
|
|
/*
|
|
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
/*
|
|
* Device abstraction module
|
|
*
|
|
* This module exposes a ``enhanced device'' that uses aproc
|
|
* structures framework; it does conversions on the fly and can
|
|
* handle multiple streams. The enhanced device starts and stops
|
|
* automatically, when streams are attached, and provides
|
|
* primitives for MIDI control
|
|
*
|
|
* From the main loop, the device is used as follows:
|
|
*
|
|
* 1. create the device using dev_new_xxx()
|
|
* 2. call dev_run() in the event loop
|
|
* 3. destroy the device using dev_del()
|
|
* 4. continue running the event loop to drain
|
|
*
|
|
* The device is used as follows from aproc context:
|
|
*
|
|
* 1. open the device with dev_ref()
|
|
* 2. negociate parameters (mode, rate, ...)
|
|
* 3. create your stream (ie allocate and fill abufs)
|
|
* 4. attach your stream atomically:
|
|
* - first call dev_wakeup() to ensure device is not suspended
|
|
* - possibly fetch dynamic parameters (eg. dev_getpos())
|
|
* - attach your buffers with dev_attach()
|
|
* 5. close your stream, ie abuf_eof() or abuf_hup()
|
|
* 6. close the device with dev_unref()
|
|
*
|
|
* The device has the following states:
|
|
*
|
|
* CLOSED sio_open() is not called, it's not ready and
|
|
* no streams can be attached; dev_ref() must
|
|
* be called to open the device
|
|
*
|
|
* INIT device is opened, processing chain is ready, but
|
|
* DMA is not started yet. Streams can attach,
|
|
* in which case device will automatically switch
|
|
* to the START state
|
|
*
|
|
* START at least one stream is attached, play buffers
|
|
* are primed (if necessary) DMA is ready and
|
|
* will start immeadiately (next cycle)
|
|
*
|
|
* RUN DMA is started. New streams can attach. If the
|
|
* device is idle (all streams are closed and
|
|
* finished draining), then the device
|
|
* automatically switches to INIT or CLOSED
|
|
*/
|
|
/*
|
|
* TODO:
|
|
*
|
|
* priming buffer is not ok, because it will insert silence and
|
|
* break synchronization to other programs.
|
|
*
|
|
* priming buffer in server mode is required, because f->bufsz may
|
|
* be smaller than the server buffer and may cause underrun in the
|
|
* dev_bufsz part of the buffer, in turn causing apps to break. It
|
|
* doesn't hurt because we care only in synchronization between
|
|
* clients.
|
|
*
|
|
* Priming is not required in non-server mode, because streams
|
|
* actually start when they are in the READY state, and their
|
|
* buffer is large enough to never cause underruns of dev_bufsz.
|
|
*
|
|
* Fix sock.c to allocate dev_bufsz, but to use only appbufsz --
|
|
* or whatever -- but to avoid underruns in dev_bufsz. Then remove
|
|
* this ugly hack.
|
|
*
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "abuf.h"
|
|
#include "aproc.h"
|
|
#include "conf.h"
|
|
#include "dev.h"
|
|
#include "pipe.h"
|
|
#include "miofile.h"
|
|
#include "siofile.h"
|
|
#include "midi.h"
|
|
#include "opt.h"
|
|
#ifdef DEBUG
|
|
#include "dbg.h"
|
|
#endif
|
|
|
|
int dev_open(struct dev *);
|
|
void dev_close(struct dev *);
|
|
void dev_start(struct dev *);
|
|
void dev_stop(struct dev *);
|
|
void dev_clear(struct dev *);
|
|
|
|
struct dev *dev_list = NULL;
|
|
|
|
/*
|
|
* Create a sndio device
|
|
*/
|
|
struct dev *
|
|
dev_new_sio(char *path,
|
|
unsigned mode, struct aparams *dipar, struct aparams *dopar,
|
|
unsigned bufsz, unsigned round, unsigned hold, unsigned autovol)
|
|
{
|
|
struct dev *d;
|
|
|
|
d = malloc(sizeof(struct dev));
|
|
if (d == NULL) {
|
|
perror("malloc");
|
|
exit(1);
|
|
}
|
|
d->path = path;
|
|
d->reqmode = mode;
|
|
if (mode & MODE_PLAY)
|
|
d->reqopar = *dopar;
|
|
if (mode & MODE_RECMASK)
|
|
d->reqipar = *dipar;
|
|
d->reqbufsz = bufsz;
|
|
d->reqround = round;
|
|
d->hold = hold;
|
|
d->autovol = autovol;
|
|
d->pstate = DEV_CLOSED;
|
|
d->next = dev_list;
|
|
dev_list = d;
|
|
if (d->hold && !dev_open(d)) {
|
|
dev_del(d);
|
|
return NULL;
|
|
}
|
|
return d;
|
|
}
|
|
|
|
/*
|
|
* Create a loopback synchronous device
|
|
*/
|
|
struct dev *
|
|
dev_new_loop(struct aparams *dipar, struct aparams *dopar, unsigned bufsz)
|
|
{
|
|
struct aparams par;
|
|
unsigned cmin, cmax, rate;
|
|
struct dev *d;
|
|
|
|
d = malloc(sizeof(struct dev));
|
|
if (d == NULL) {
|
|
perror("malloc");
|
|
exit(1);
|
|
}
|
|
cmin = (dipar->cmin < dopar->cmin) ? dipar->cmin : dopar->cmin;
|
|
cmax = (dipar->cmax > dopar->cmax) ? dipar->cmax : dopar->cmax;
|
|
rate = (dipar->rate > dopar->rate) ? dipar->rate : dopar->rate;
|
|
aparams_init(&par, cmin, cmax, rate);
|
|
d->reqipar = par;
|
|
d->reqopar = par;
|
|
d->rate = rate;
|
|
d->reqround = (bufsz + 1) / 2;
|
|
d->reqbufsz = d->reqround * 2;
|
|
d->reqmode = MODE_PLAY | MODE_REC | MODE_LOOP | MODE_MIDIMASK;
|
|
d->pstate = DEV_CLOSED;
|
|
d->hold = 0;
|
|
d->path = "loop";
|
|
d->next = dev_list;
|
|
dev_list = d;
|
|
return d;
|
|
}
|
|
|
|
/*
|
|
* Create a MIDI thru box device
|
|
*/
|
|
struct dev *
|
|
dev_new_thru(void)
|
|
{
|
|
struct dev *d;
|
|
|
|
d = malloc(sizeof(struct dev));
|
|
if (d == NULL) {
|
|
perror("malloc");
|
|
exit(1);
|
|
}
|
|
d->reqmode = MODE_MIDIMASK;
|
|
d->pstate = DEV_CLOSED;
|
|
d->hold = 0;
|
|
d->path = "midithru";
|
|
d->next = dev_list;
|
|
dev_list = d;
|
|
return d;
|
|
}
|
|
|
|
/*
|
|
* Open the device with the dev_reqxxx capabilities. Setup a mixer, demuxer,
|
|
* monitor, midi control, and any necessary conversions.
|
|
*/
|
|
int
|
|
dev_open(struct dev *d)
|
|
{
|
|
struct file *f;
|
|
struct aparams par;
|
|
struct aproc *conv;
|
|
struct abuf *buf;
|
|
unsigned siomode;
|
|
|
|
d->mode = d->reqmode;
|
|
d->round = d->reqround;
|
|
d->bufsz = d->reqbufsz;
|
|
d->ipar = d->reqipar;
|
|
d->opar = d->reqopar;
|
|
d->rec = NULL;
|
|
d->play = NULL;
|
|
d->mon = NULL;
|
|
d->mix = NULL;
|
|
d->sub = NULL;
|
|
d->submon = NULL;
|
|
d->midi = NULL;
|
|
d->rate = 0;
|
|
|
|
/*
|
|
* If needed, open the device (ie create dev_rec and dev_play)
|
|
*/
|
|
if ((d->mode & (MODE_PLAY | MODE_REC)) && !(d->mode & MODE_LOOP)) {
|
|
siomode = d->mode & (MODE_PLAY | MODE_REC);
|
|
f = (struct file *)siofile_new(&siofile_ops,
|
|
d->path,
|
|
&siomode,
|
|
&d->ipar,
|
|
&d->opar,
|
|
&d->bufsz,
|
|
&d->round);
|
|
if (f == NULL) {
|
|
#ifdef DEBUG
|
|
if (debug_level >= 1) {
|
|
dbg_puts(d->path);
|
|
dbg_puts(": failed to open audio device\n");
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
if (!(siomode & MODE_PLAY))
|
|
d->mode &= ~(MODE_PLAY | MODE_MON);
|
|
if (!(siomode & MODE_REC))
|
|
d->mode &= ~MODE_REC;
|
|
if ((d->mode & (MODE_PLAY | MODE_REC)) == 0) {
|
|
#ifdef DEBUG
|
|
if (debug_level >= 1) {
|
|
dbg_puts(d->path);
|
|
dbg_puts(": mode not supported by device\n");
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
d->rate = d->mode & MODE_REC ? d->ipar.rate : d->opar.rate;
|
|
#ifdef DEBUG
|
|
if (debug_level >= 2) {
|
|
if (d->mode & MODE_REC) {
|
|
dbg_puts(d->path);
|
|
dbg_puts(": recording ");
|
|
aparams_dbg(&d->ipar);
|
|
dbg_puts("\n");
|
|
}
|
|
if (d->mode & MODE_PLAY) {
|
|
dbg_puts(d->path);
|
|
dbg_puts(": playing ");
|
|
aparams_dbg(&d->opar);
|
|
dbg_puts("\n");
|
|
}
|
|
}
|
|
#endif
|
|
if (d->mode & MODE_REC) {
|
|
d->rec = rsio_new(f);
|
|
d->rec->refs++;
|
|
}
|
|
if (d->mode & MODE_PLAY) {
|
|
d->play = wsio_new(f);
|
|
d->play->refs++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create the midi control end, or a simple thru box
|
|
* if there's no device
|
|
*/
|
|
if (d->mode & MODE_MIDIMASK) {
|
|
d->midi = (d->mode & (MODE_PLAY | MODE_RECMASK)) ?
|
|
ctl_new("ctl", d) : thru_new("thru");
|
|
d->midi->refs++;
|
|
}
|
|
|
|
/*
|
|
* Create mixer, demuxer and monitor
|
|
*/
|
|
if (d->mode & MODE_PLAY) {
|
|
d->mix = mix_new("play", d->bufsz, d->round, d->autovol);
|
|
d->mix->refs++;
|
|
d->mix->u.mix.ctl = d->midi;
|
|
}
|
|
if (d->mode & MODE_REC) {
|
|
d->sub = sub_new("rec", d->bufsz, d->round);
|
|
d->sub->refs++;
|
|
/*
|
|
* If not playing, use the record end as clock source
|
|
*/
|
|
if (!(d->mode & MODE_PLAY))
|
|
d->sub->u.sub.ctl = d->midi;
|
|
}
|
|
if (d->mode & MODE_LOOP) {
|
|
/*
|
|
* connect mixer out to demuxer in
|
|
*/
|
|
buf = abuf_new(d->bufsz, &d->opar);
|
|
aproc_setout(d->mix, buf);
|
|
aproc_setin(d->sub, buf);
|
|
|
|
d->mix->flags |= APROC_QUIT;
|
|
d->sub->flags |= APROC_QUIT;
|
|
d->rate = d->opar.rate;
|
|
}
|
|
if (d->rec) {
|
|
aparams_init(&par, d->ipar.cmin, d->ipar.cmax, d->rate);
|
|
|
|
/*
|
|
* Create device <-> demuxer buffer
|
|
*/
|
|
buf = abuf_new(d->bufsz, &d->ipar);
|
|
aproc_setout(d->rec, buf);
|
|
|
|
/*
|
|
* Insert a converter, if needed.
|
|
*/
|
|
if (!aparams_eqenc(&d->ipar, &par)) {
|
|
conv = dec_new("rec", &d->ipar);
|
|
aproc_setin(conv, buf);
|
|
buf = abuf_new(d->round, &par);
|
|
aproc_setout(conv, buf);
|
|
}
|
|
d->ipar = par;
|
|
aproc_setin(d->sub, buf);
|
|
}
|
|
if (d->play) {
|
|
aparams_init(&par, d->opar.cmin, d->opar.cmax, d->rate);
|
|
|
|
/*
|
|
* Create device <-> mixer buffer
|
|
*/
|
|
buf = abuf_new(d->bufsz, &d->opar);
|
|
aproc_setin(d->play, buf);
|
|
|
|
/*
|
|
* Append a converter, if needed.
|
|
*/
|
|
if (!aparams_eqenc(&par, &d->opar)) {
|
|
conv = enc_new("play", &d->opar);
|
|
aproc_setout(conv, buf);
|
|
buf = abuf_new(d->round, &par);
|
|
aproc_setin(conv, buf);
|
|
}
|
|
d->opar = par;
|
|
aproc_setout(d->mix, buf);
|
|
}
|
|
if (d->mode & MODE_MON) {
|
|
d->mon = mon_new("mon", d->bufsz);
|
|
d->mon->refs++;
|
|
buf = abuf_new(d->bufsz, &d->opar);
|
|
aproc_setout(d->mon, buf);
|
|
|
|
/*
|
|
* Append a "sub" to which clients will connect.
|
|
*/
|
|
d->submon = sub_new("mon", d->bufsz, d->round);
|
|
d->submon->refs++;
|
|
aproc_setin(d->submon, buf);
|
|
|
|
/*
|
|
* Attach to the mixer
|
|
*/
|
|
d->mix->u.mix.mon = d->mon;
|
|
d->mon->refs++;
|
|
}
|
|
#ifdef DEBUG
|
|
if (debug_level >= 2) {
|
|
if (d->mode & (MODE_PLAY | MODE_RECMASK)) {
|
|
dbg_puts(d->path);
|
|
dbg_puts(": block size is ");
|
|
dbg_putu(d->round);
|
|
dbg_puts(" frames, using ");
|
|
dbg_putu(d->bufsz / d->round);
|
|
dbg_puts(" blocks\n");
|
|
}
|
|
}
|
|
#endif
|
|
d->pstate = DEV_INIT;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Cleanly stop and drain everything and close the device
|
|
* once both play chain and record chain are gone.
|
|
*/
|
|
void
|
|
dev_close(struct dev *d)
|
|
{
|
|
struct file *f;
|
|
|
|
/*
|
|
* if the device is starting, ensure it actually starts
|
|
* so buffers are drained, else clear any buffers
|
|
*/
|
|
switch (d->pstate) {
|
|
case DEV_START:
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3)
|
|
dbg_puts("draining device\n");
|
|
#endif
|
|
dev_start(d);
|
|
break;
|
|
case DEV_INIT:
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3)
|
|
dbg_puts("flushing device\n");
|
|
#endif
|
|
dev_clear(d);
|
|
break;
|
|
}
|
|
#ifdef DEBUG
|
|
if (debug_level >= 2)
|
|
dbg_puts("closing device\n");
|
|
#endif
|
|
|
|
if (d->mix) {
|
|
/*
|
|
* Put the mixer in ``autoquit'' state and generate
|
|
* EOF on all inputs connected it. Once buffers are
|
|
* drained the mixer will terminate and shutdown the
|
|
* device.
|
|
*
|
|
* NOTE: since file_eof() can destroy the file and
|
|
* reorder the file_list, we have to restart the loop
|
|
* after each call to file_eof().
|
|
*/
|
|
if (APROC_OK(d->mix))
|
|
mix_quit(d->mix);
|
|
|
|
/*
|
|
* XXX: handle this in mix_done()
|
|
*/
|
|
if (APROC_OK(d->mix->u.mix.mon)) {
|
|
d->mix->u.mix.mon->refs--;
|
|
aproc_del(d->mix->u.mix.mon);
|
|
d->mix->u.mix.mon = NULL;
|
|
}
|
|
restart_mix:
|
|
LIST_FOREACH(f, &file_list, entry) {
|
|
if (f->rproc != NULL &&
|
|
aproc_depend(d->mix, f->rproc)) {
|
|
file_eof(f);
|
|
goto restart_mix;
|
|
}
|
|
}
|
|
} else if (d->sub) {
|
|
/*
|
|
* Same as above, but since there's no mixer,
|
|
* we generate EOF on the record-end of the
|
|
* device.
|
|
*/
|
|
restart_sub:
|
|
LIST_FOREACH(f, &file_list, entry) {
|
|
if (f->rproc != NULL &&
|
|
aproc_depend(d->sub, f->rproc)) {
|
|
file_eof(f);
|
|
goto restart_sub;
|
|
}
|
|
}
|
|
} else if (d->submon) {
|
|
/*
|
|
* Same as above
|
|
*/
|
|
restart_submon:
|
|
LIST_FOREACH(f, &file_list, entry) {
|
|
if (f->rproc != NULL &&
|
|
aproc_depend(d->submon, f->rproc)) {
|
|
file_eof(f);
|
|
goto restart_submon;
|
|
}
|
|
}
|
|
}
|
|
if (d->midi) {
|
|
d->midi->flags |= APROC_QUIT;
|
|
if (LIST_EMPTY(&d->midi->ins))
|
|
aproc_del(d->midi);
|
|
restart_midi:
|
|
LIST_FOREACH(f, &file_list, entry) {
|
|
if (f->rproc &&
|
|
aproc_depend(d->midi, f->rproc)) {
|
|
file_eof(f);
|
|
goto restart_midi;
|
|
}
|
|
}
|
|
}
|
|
if (d->mix) {
|
|
if (--d->mix->refs == 0 && (d->mix->flags & APROC_ZOMB))
|
|
aproc_del(d->mix);
|
|
d->mix = NULL;
|
|
}
|
|
if (d->play) {
|
|
if (--d->play->refs == 0 && (d->play->flags & APROC_ZOMB))
|
|
aproc_del(d->play);
|
|
d->play = NULL;
|
|
}
|
|
if (d->sub) {
|
|
if (--d->sub->refs == 0 && (d->sub->flags & APROC_ZOMB))
|
|
aproc_del(d->sub);
|
|
d->sub = NULL;
|
|
}
|
|
if (d->rec) {
|
|
if (--d->rec->refs == 0 && (d->rec->flags & APROC_ZOMB))
|
|
aproc_del(d->rec);
|
|
d->rec = NULL;
|
|
}
|
|
if (d->submon) {
|
|
if (--d->submon->refs == 0 && (d->submon->flags & APROC_ZOMB))
|
|
aproc_del(d->submon);
|
|
d->submon = NULL;
|
|
}
|
|
if (d->mon) {
|
|
if (--d->mon->refs == 0 && (d->mon->flags & APROC_ZOMB))
|
|
aproc_del(d->mon);
|
|
d->mon = NULL;
|
|
}
|
|
if (d->midi) {
|
|
if (--d->midi->refs == 0 && (d->midi->flags & APROC_ZOMB))
|
|
aproc_del(d->midi);
|
|
d->midi = NULL;
|
|
}
|
|
d->pstate = DEV_CLOSED;
|
|
}
|
|
|
|
/*
|
|
* Unless the device is already in process of closing, request it to close
|
|
*/
|
|
void
|
|
dev_drain(struct dev *d)
|
|
{
|
|
if (d->pstate != DEV_CLOSED)
|
|
dev_close(d);
|
|
}
|
|
|
|
/*
|
|
* Free the device
|
|
*/
|
|
void
|
|
dev_del(struct dev *d)
|
|
{
|
|
struct dev **p;
|
|
|
|
dev_drain(d);
|
|
for (p = &dev_list; *p != d; p = &(*p)->next) {
|
|
#ifdef DEBUG
|
|
if (*p == NULL) {
|
|
dbg_puts("device to delete not on the list\n");
|
|
dbg_panic();
|
|
}
|
|
#endif
|
|
}
|
|
*p = d->next;
|
|
free(d);
|
|
}
|
|
|
|
/*
|
|
* Open a MIDI device and connect it to the thru box
|
|
*/
|
|
int
|
|
dev_thruadd(struct dev *d, char *name, int in, int out)
|
|
{
|
|
struct file *f;
|
|
struct abuf *rbuf = NULL, *wbuf = NULL;
|
|
struct aproc *rproc, *wproc;
|
|
|
|
if (!dev_ref(d))
|
|
return 0;
|
|
f = (struct file *)miofile_new(&miofile_ops, name, in, out);
|
|
if (f == NULL)
|
|
return 0;
|
|
if (in) {
|
|
rproc = rfile_new(f);
|
|
rbuf = abuf_new(MIDI_BUFSZ, &aparams_none);
|
|
aproc_setout(rproc, rbuf);
|
|
}
|
|
if (out) {
|
|
wproc = wfile_new(f);
|
|
wbuf = abuf_new(MIDI_BUFSZ, &aparams_none);
|
|
aproc_setin(wproc, wbuf);
|
|
}
|
|
dev_midiattach(d, rbuf, wbuf);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Attach a bi-directional MIDI stream to the MIDI device
|
|
*/
|
|
void
|
|
dev_midiattach(struct dev *d, struct abuf *ibuf, struct abuf *obuf)
|
|
{
|
|
if (ibuf)
|
|
aproc_setin(d->midi, ibuf);
|
|
if (obuf) {
|
|
aproc_setout(d->midi, obuf);
|
|
if (ibuf) {
|
|
ibuf->duplex = obuf;
|
|
obuf->duplex = ibuf;
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned
|
|
dev_roundof(struct dev *d, unsigned newrate)
|
|
{
|
|
return (d->round * newrate + d->rate / 2) / d->rate;
|
|
}
|
|
|
|
/*
|
|
* Start the (paused) device. By default it's paused.
|
|
*/
|
|
void
|
|
dev_start(struct dev *d)
|
|
{
|
|
struct file *f;
|
|
|
|
#ifdef DEBUG
|
|
if (debug_level >= 2)
|
|
dbg_puts("starting device\n");
|
|
#endif
|
|
d->pstate = DEV_RUN;
|
|
if (d->mode & MODE_LOOP)
|
|
return;
|
|
if (APROC_OK(d->mix))
|
|
d->mix->flags |= APROC_DROP;
|
|
if (APROC_OK(d->sub))
|
|
d->sub->flags |= APROC_DROP;
|
|
if (APROC_OK(d->submon))
|
|
d->submon->flags |= APROC_DROP;
|
|
if (APROC_OK(d->play) && d->play->u.io.file) {
|
|
f = d->play->u.io.file;
|
|
f->ops->start(f);
|
|
} else if (APROC_OK(d->rec) && d->rec->u.io.file) {
|
|
f = d->rec->u.io.file;
|
|
f->ops->start(f);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Pause the device. This may trigger context switches,
|
|
* so it shouldn't be called from aproc methods
|
|
*/
|
|
void
|
|
dev_stop(struct dev *d)
|
|
{
|
|
struct file *f;
|
|
|
|
#ifdef DEBUG
|
|
if (debug_level >= 2)
|
|
dbg_puts("device stopped\n");
|
|
#endif
|
|
d->pstate = DEV_INIT;
|
|
if (d->mode & MODE_LOOP)
|
|
return;
|
|
if (APROC_OK(d->play) && d->play->u.io.file) {
|
|
f = d->play->u.io.file;
|
|
f->ops->stop(f);
|
|
} else if (APROC_OK(d->rec) && d->rec->u.io.file) {
|
|
f = d->rec->u.io.file;
|
|
f->ops->stop(f);
|
|
}
|
|
if (APROC_OK(d->mix))
|
|
d->mix->flags &= ~APROC_DROP;
|
|
if (APROC_OK(d->sub))
|
|
d->sub->flags &= ~APROC_DROP;
|
|
if (APROC_OK(d->submon))
|
|
d->submon->flags &= ~APROC_DROP;
|
|
}
|
|
|
|
int
|
|
dev_ref(struct dev *d)
|
|
{
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3)
|
|
dbg_puts("device requested\n");
|
|
#endif
|
|
if (d->pstate == DEV_CLOSED && !dev_open(d)) {
|
|
if (d->hold)
|
|
dev_del(d);
|
|
return 0;
|
|
}
|
|
d->refcnt++;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
dev_unref(struct dev *d)
|
|
{
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3)
|
|
dbg_puts("device released\n");
|
|
#endif
|
|
d->refcnt--;
|
|
if (d->refcnt == 0 && d->pstate == DEV_INIT && !d->hold)
|
|
dev_close(d);
|
|
}
|
|
|
|
/*
|
|
* There are actions (like start/stop/close ... ) that may trigger aproc
|
|
* operations, a thus cannot be started from aproc context.
|
|
* To avoid problems, aprocs only change the s!tate of the device,
|
|
* and actual operations are triggered from the main loop,
|
|
* outside the aproc code path.
|
|
*
|
|
* The following routine invokes pending actions, returns 0
|
|
* on fatal error
|
|
*/
|
|
int
|
|
dev_run(struct dev *d)
|
|
{
|
|
if (d->pstate == DEV_CLOSED)
|
|
return 1;
|
|
/*
|
|
* check if device isn't gone
|
|
*/
|
|
if (((d->mode & MODE_PLAY) && !APROC_OK(d->mix)) ||
|
|
((d->mode & MODE_REC) && !APROC_OK(d->sub)) ||
|
|
((d->mode & MODE_MON) && !APROC_OK(d->submon))) {
|
|
#ifdef DEBUG
|
|
if (debug_level >= 1)
|
|
dbg_puts("device disappeared\n");
|
|
#endif
|
|
if (d->hold) {
|
|
dev_del(d);
|
|
return 0;
|
|
}
|
|
dev_close(d);
|
|
return 1;
|
|
}
|
|
switch (d->pstate) {
|
|
case DEV_INIT:
|
|
/* nothing */
|
|
break;
|
|
case DEV_START:
|
|
dev_start(d);
|
|
/* PASSTHROUGH */
|
|
case DEV_RUN:
|
|
/*
|
|
* if the device is not used, then stop it
|
|
*/
|
|
if ((!APROC_OK(d->mix) ||
|
|
d->mix->u.mix.idle > 2 * d->bufsz) &&
|
|
(!APROC_OK(d->sub) ||
|
|
d->sub->u.sub.idle > 2 * d->bufsz) &&
|
|
(!APROC_OK(d->submon) ||
|
|
d->submon->u.sub.idle > 2 * d->bufsz) &&
|
|
(!APROC_OK(d->midi) ||
|
|
d->midi->u.ctl.tstate != CTL_RUN)) {
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3)
|
|
dbg_puts("device idle, suspending\n");
|
|
#endif
|
|
dev_stop(d);
|
|
if (d->refcnt == 0 && !d->hold)
|
|
dev_close(d);
|
|
else
|
|
dev_clear(d);
|
|
}
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* If the device is paused, then resume it.
|
|
* This routine can be called from aproc context.
|
|
*/
|
|
void
|
|
dev_wakeup(struct dev *d)
|
|
{
|
|
if (d->pstate == DEV_INIT)
|
|
d->pstate = DEV_START;
|
|
}
|
|
|
|
/*
|
|
* Find the end points connected to the mix/sub.
|
|
*/
|
|
int
|
|
dev_getep(struct dev *d,
|
|
unsigned mode, struct abuf **sibuf, struct abuf **sobuf)
|
|
{
|
|
struct abuf *ibuf, *obuf;
|
|
|
|
if (mode & MODE_PLAY) {
|
|
if (!APROC_OK(d->mix))
|
|
return 0;
|
|
ibuf = *sibuf;
|
|
for (;;) {
|
|
if (!ibuf || !ibuf->rproc) {
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3) {
|
|
abuf_dbg(*sibuf);
|
|
dbg_puts(": not connected to device\n");
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
if (ibuf->rproc == d->mix)
|
|
break;
|
|
ibuf = LIST_FIRST(&ibuf->rproc->outs);
|
|
}
|
|
*sibuf = ibuf;
|
|
}
|
|
if (mode & MODE_REC) {
|
|
if (!APROC_OK(d->sub))
|
|
return 0;
|
|
obuf = *sobuf;
|
|
for (;;) {
|
|
if (!obuf || !obuf->wproc) {
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3) {
|
|
abuf_dbg(*sobuf);
|
|
dbg_puts(": not connected to device\n");
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
if (obuf->wproc == d->sub)
|
|
break;
|
|
obuf = LIST_FIRST(&obuf->wproc->ins);
|
|
}
|
|
*sobuf = obuf;
|
|
}
|
|
if (mode & MODE_MON) {
|
|
if (!APROC_OK(d->submon))
|
|
return 0;
|
|
obuf = *sobuf;
|
|
for (;;) {
|
|
if (!obuf || !obuf->wproc) {
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3) {
|
|
abuf_dbg(*sobuf);
|
|
dbg_puts(": not connected to device\n");
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
if (obuf->wproc == d->submon)
|
|
break;
|
|
obuf = LIST_FIRST(&obuf->wproc->ins);
|
|
}
|
|
*sobuf = obuf;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Sync play buffer to rec buffer (for instance when one of
|
|
* them underruns/overruns).
|
|
*/
|
|
void
|
|
dev_sync(struct dev *d, unsigned mode, struct abuf *ibuf, struct abuf *obuf)
|
|
{
|
|
int delta, offs;
|
|
struct abuf *mbuf = NULL;
|
|
|
|
if (!dev_getep(d, mode, &ibuf, &obuf))
|
|
return;
|
|
/*
|
|
* Calculate delta, the number of frames the play chain is ahead
|
|
* of the record chain. It's necessary to schedule silences (or
|
|
* drops) in order to start playback and record in sync.
|
|
*/
|
|
offs = 0;
|
|
delta = 0;
|
|
if (APROC_OK(d->mix)) {
|
|
mbuf = LIST_FIRST(&d->mix->outs);
|
|
offs += mbuf->w.mix.todo;
|
|
delta += d->mix->u.mix.lat;
|
|
}
|
|
if (APROC_OK(d->sub))
|
|
delta += d->sub->u.sub.lat;
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3) {
|
|
dbg_puts("syncing device");
|
|
if (APROC_OK(d->mix)) {
|
|
dbg_puts(", ");
|
|
aproc_dbg(d->mix);
|
|
dbg_puts(": todo = ");
|
|
dbg_putu(mbuf->w.mix.todo);
|
|
dbg_puts(": lat = ");
|
|
dbg_putu(d->mix->u.mix.lat);
|
|
}
|
|
if (APROC_OK(d->sub)) {
|
|
dbg_puts(", ");
|
|
aproc_dbg(d->sub);
|
|
dbg_puts(": lat = ");
|
|
dbg_putu(d->sub->u.sub.lat);
|
|
}
|
|
dbg_puts("\n");
|
|
}
|
|
#endif
|
|
if (mode & MODE_PLAY)
|
|
mix_drop(ibuf, -offs);
|
|
if (mode & MODE_RECMASK)
|
|
sub_silence(obuf, -(offs + delta));
|
|
}
|
|
|
|
/*
|
|
* return the current latency (in frames), ie the latency that
|
|
* a stream would have if dev_attach() is called on it.
|
|
*/
|
|
int
|
|
dev_getpos(struct dev *d)
|
|
{
|
|
struct abuf *mbuf = NULL;
|
|
|
|
if (APROC_OK(d->mix)) {
|
|
mbuf = LIST_FIRST(&d->mix->outs);
|
|
return -(mbuf->w.mix.todo + d->mix->u.mix.lat);
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Attach the given input and output buffers to the mixer and the
|
|
* multiplexer respectively. The operation is done synchronously, so
|
|
* both buffers enter in sync. If buffers do not match play
|
|
* and rec.
|
|
*/
|
|
void
|
|
dev_attach(struct dev *d, char *name, unsigned mode,
|
|
struct abuf *ibuf, struct aparams *sipar, unsigned inch,
|
|
struct abuf *obuf, struct aparams *sopar, unsigned onch,
|
|
unsigned xrun, int vol)
|
|
{
|
|
struct abuf *pbuf = NULL, *rbuf = NULL;
|
|
struct aparams ipar, opar;
|
|
struct aproc *conv;
|
|
unsigned round, nblk, nch;
|
|
|
|
#ifdef DEBUG
|
|
if ((!APROC_OK(d->mix) && (mode & MODE_PLAY)) ||
|
|
(!APROC_OK(d->sub) && (mode & MODE_REC)) ||
|
|
(!APROC_OK(d->submon) && (mode & MODE_MON))) {
|
|
dbg_puts("mode beyond device mode, not attaching\n");
|
|
return;
|
|
}
|
|
#endif
|
|
if (mode & MODE_PLAY) {
|
|
ipar = *sipar;
|
|
pbuf = LIST_FIRST(&d->mix->outs);
|
|
nblk = (d->bufsz / d->round + 3) / 4;
|
|
round = dev_roundof(d, ipar.rate);
|
|
nch = ipar.cmax - ipar.cmin + 1;
|
|
if (!aparams_eqenc(&ipar, &d->opar)) {
|
|
conv = dec_new(name, &ipar);
|
|
ipar.bps = d->opar.bps;
|
|
ipar.bits = d->opar.bits;
|
|
ipar.sig = d->opar.sig;
|
|
ipar.le = d->opar.le;
|
|
ipar.msb = d->opar.msb;
|
|
aproc_setin(conv, ibuf);
|
|
ibuf = abuf_new(nblk * round, &ipar);
|
|
aproc_setout(conv, ibuf);
|
|
}
|
|
if (inch > 0 && nch >= inch * 2) {
|
|
conv = join_new(name);
|
|
aproc_setin(conv, ibuf);
|
|
ipar.cmax = ipar.cmin + inch - 1;
|
|
ibuf = abuf_new(nblk * round, &ipar);
|
|
aproc_setout(conv, ibuf);
|
|
}
|
|
if (!aparams_eqrate(&ipar, &d->opar)) {
|
|
conv = resamp_new(name, round, d->round);
|
|
ipar.rate = d->opar.rate;
|
|
round = d->round;
|
|
aproc_setin(conv, ibuf);
|
|
ibuf = abuf_new(nblk * round, &ipar);
|
|
aproc_setout(conv, ibuf);
|
|
}
|
|
if (inch > 0 && nch * 2 <= inch) {
|
|
conv = join_new(name);
|
|
aproc_setin(conv, ibuf);
|
|
ipar.cmax = ipar.cmin + inch - 1;
|
|
ibuf = abuf_new(nblk * round, &ipar);
|
|
aproc_setout(conv, ibuf);
|
|
}
|
|
aproc_setin(d->mix, ibuf);
|
|
ibuf->r.mix.xrun = xrun;
|
|
ibuf->r.mix.maxweight = vol;
|
|
mix_setmaster(d->mix);
|
|
}
|
|
if (mode & MODE_REC) {
|
|
opar = *sopar;
|
|
rbuf = LIST_FIRST(&d->sub->ins);
|
|
round = dev_roundof(d, opar.rate);
|
|
nblk = (d->bufsz / d->round + 3) / 4;
|
|
nch = opar.cmax - opar.cmin + 1;
|
|
if (!aparams_eqenc(&opar, &d->ipar)) {
|
|
conv = enc_new(name, &opar);
|
|
opar.bps = d->ipar.bps;
|
|
opar.bits = d->ipar.bits;
|
|
opar.sig = d->ipar.sig;
|
|
opar.le = d->ipar.le;
|
|
opar.msb = d->ipar.msb;
|
|
aproc_setout(conv, obuf);
|
|
obuf = abuf_new(nblk * round, &opar);
|
|
aproc_setin(conv, obuf);
|
|
}
|
|
if (onch > 0 && nch >= onch * 2) {
|
|
conv = join_new(name);
|
|
aproc_setout(conv, obuf);
|
|
opar.cmax = opar.cmin + onch - 1;
|
|
obuf = abuf_new(nblk * round, &opar);
|
|
aproc_setin(conv, obuf);
|
|
}
|
|
if (!aparams_eqrate(&opar, &d->ipar)) {
|
|
conv = resamp_new(name, d->round, round);
|
|
opar.rate = d->ipar.rate;
|
|
round = d->round;
|
|
aproc_setout(conv, obuf);
|
|
obuf = abuf_new(nblk * round, &opar);
|
|
aproc_setin(conv, obuf);
|
|
}
|
|
if (onch > 0 && nch * 2 <= onch) {
|
|
conv = join_new(name);
|
|
aproc_setout(conv, obuf);
|
|
opar.cmax = opar.cmin + onch - 1;
|
|
obuf = abuf_new(nblk * round, &opar);
|
|
aproc_setin(conv, obuf);
|
|
}
|
|
aproc_setout(d->sub, obuf);
|
|
obuf->w.sub.xrun = xrun;
|
|
}
|
|
if (mode & MODE_MON) {
|
|
opar = *sopar;
|
|
rbuf = LIST_FIRST(&d->submon->ins);
|
|
round = dev_roundof(d, opar.rate);
|
|
nblk = (d->bufsz / d->round + 3) / 4;
|
|
nch = opar.cmax - opar.cmin + 1;
|
|
if (!aparams_eqenc(&opar, &d->opar)) {
|
|
conv = enc_new(name, &opar);
|
|
opar.bps = d->opar.bps;
|
|
opar.bits = d->opar.bits;
|
|
opar.sig = d->opar.sig;
|
|
opar.le = d->opar.le;
|
|
opar.msb = d->opar.msb;
|
|
aproc_setout(conv, obuf);
|
|
obuf = abuf_new(nblk * round, &opar);
|
|
aproc_setin(conv, obuf);
|
|
}
|
|
if (onch > 0 && nch >= onch * 2) {
|
|
conv = join_new(name);
|
|
aproc_setout(conv, obuf);
|
|
opar.cmax = opar.cmin + onch - 1;
|
|
obuf = abuf_new(nblk * round, &opar);
|
|
aproc_setin(conv, obuf);
|
|
}
|
|
if (!aparams_eqrate(&opar, &d->opar)) {
|
|
conv = resamp_new(name, d->round, round);
|
|
opar.rate = d->opar.rate;
|
|
round = d->round;
|
|
aproc_setout(conv, obuf);
|
|
obuf = abuf_new(nblk * round, &opar);
|
|
aproc_setin(conv, obuf);
|
|
}
|
|
if (onch > 0 && nch * 2 <= onch) {
|
|
conv = join_new(name);
|
|
aproc_setout(conv, obuf);
|
|
opar.cmax = opar.cmin + onch - 1;
|
|
obuf = abuf_new(nblk * round, &opar);
|
|
aproc_setin(conv, obuf);
|
|
}
|
|
aproc_setout(d->submon, obuf);
|
|
obuf->w.sub.xrun = xrun;
|
|
}
|
|
|
|
/*
|
|
* Sync play to record.
|
|
*/
|
|
if ((mode & MODE_PLAY) && (mode & MODE_RECMASK)) {
|
|
ibuf->duplex = obuf;
|
|
obuf->duplex = ibuf;
|
|
}
|
|
dev_sync(d, mode, ibuf, obuf);
|
|
}
|
|
|
|
/*
|
|
* Change the playback volume of the given stream.
|
|
*/
|
|
void
|
|
dev_setvol(struct dev *d, struct abuf *ibuf, int vol)
|
|
{
|
|
#ifdef DEBUG
|
|
if (debug_level >= 3) {
|
|
abuf_dbg(ibuf);
|
|
dbg_puts(": setting volume to ");
|
|
dbg_putu(vol);
|
|
dbg_puts("\n");
|
|
}
|
|
#endif
|
|
if (!dev_getep(d, MODE_PLAY, &ibuf, NULL)) {
|
|
return;
|
|
}
|
|
ibuf->r.mix.vol = vol;
|
|
}
|
|
|
|
/*
|
|
* Clear buffers of the play and record chains so that when the device
|
|
* is started, playback and record start in sync.
|
|
*/
|
|
void
|
|
dev_clear(struct dev *d)
|
|
{
|
|
struct abuf *buf;
|
|
|
|
if (APROC_OK(d->mix)) {
|
|
#ifdef DEBUG
|
|
if (!LIST_EMPTY(&d->mix->ins)) {
|
|
dbg_puts("play end not idle, can't clear device\n");
|
|
dbg_panic();
|
|
}
|
|
#endif
|
|
buf = LIST_FIRST(&d->mix->outs);
|
|
while (buf) {
|
|
abuf_clear(buf);
|
|
buf = LIST_FIRST(&buf->rproc->outs);
|
|
}
|
|
mix_clear(d->mix);
|
|
}
|
|
if (APROC_OK(d->sub)) {
|
|
#ifdef DEBUG
|
|
if (!LIST_EMPTY(&d->sub->outs)) {
|
|
dbg_puts("record end not idle, can't clear device\n");
|
|
dbg_panic();
|
|
}
|
|
#endif
|
|
buf = LIST_FIRST(&d->sub->ins);
|
|
while (buf) {
|
|
abuf_clear(buf);
|
|
buf = LIST_FIRST(&buf->wproc->ins);
|
|
}
|
|
sub_clear(d->sub);
|
|
}
|
|
if (APROC_OK(d->submon)) {
|
|
#ifdef DEBUG
|
|
if (!LIST_EMPTY(&d->submon->outs)) {
|
|
dbg_puts("monitoring end not idle, can't clear device\n");
|
|
dbg_panic();
|
|
}
|
|
#endif
|
|
buf = LIST_FIRST(&d->submon->ins);
|
|
while (buf) {
|
|
abuf_clear(buf);
|
|
buf = LIST_FIRST(&buf->wproc->ins);
|
|
}
|
|
sub_clear(d->submon);
|
|
mon_clear(d->mon);
|
|
}
|
|
}
|