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sndio/aucat/wav.c

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/*
* 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.
*/
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include "abuf.h"
#include "aproc.h"
#include "conf.h"
#include "dev.h"
#include "midi.h"
#include "wav.h"
#include "opt.h"
#ifdef DEBUG
#include "dbg.h"
#endif
short wav_ulawmap[256] = {
-32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
-23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
-15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
-11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
-876, -844, -812, -780, -748, -716, -684, -652,
-620, -588, -556, -524, -492, -460, -428, -396,
-372, -356, -340, -324, -308, -292, -276, -260,
-244, -228, -212, -196, -180, -164, -148, -132,
-120, -112, -104, -96, -88, -80, -72, -64,
-56, -48, -40, -32, -24, -16, -8, 0,
32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
876, 844, 812, 780, 748, 716, 684, 652,
620, 588, 556, 524, 492, 460, 428, 396,
372, 356, 340, 324, 308, 292, 276, 260,
244, 228, 212, 196, 180, 164, 148, 132,
120, 112, 104, 96, 88, 80, 72, 64,
56, 48, 40, 32, 24, 16, 8, 0
};
short wav_alawmap[256] = {
-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
-7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
-2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
-3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
-22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
-30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136,
-11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472,
-15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568,
-344, -328, -376, -360, -280, -264, -312, -296,
-472, -456, -504, -488, -408, -392, -440, -424,
-88, -72, -120, -104, -24, -8, -56, -40,
-216, -200, -248, -232, -152, -136, -184, -168,
-1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
-1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
-688, -656, -752, -720, -560, -528, -624, -592,
-944, -912, -1008, -976, -816, -784, -880, -848,
5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
344, 328, 376, 360, 280, 264, 312, 296,
472, 456, 504, 488, 408, 392, 440, 424,
88, 72, 120, 104, 24, 8, 56, 40,
216, 200, 248, 232, 152, 136, 184, 168,
1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
688, 656, 752, 720, 560, 528, 624, 592,
944, 912, 1008, 976, 816, 784, 880, 848
};
/*
* Max data of a .wav file. The total file size must be smaller than
* 2^31, and we also have to leave some space for the headers (around 40
* bytes).
*/
#define WAV_DATAMAX (0x7fff0000)
struct fileops wav_ops = {
"wav",
sizeof(struct wav),
wav_close,
wav_read,
wav_write,
NULL, /* start */
NULL, /* stop */
pipe_nfds,
pipe_pollfd,
pipe_revents
};
int rwav_in(struct aproc *, struct abuf *);
int rwav_out(struct aproc *, struct abuf *);
void rwav_eof(struct aproc *, struct abuf *);
void rwav_hup(struct aproc *, struct abuf *);
void rwav_done(struct aproc *);
struct aproc *rwav_new(struct file *);
int wwav_in(struct aproc *, struct abuf *);
int wwav_out(struct aproc *, struct abuf *);
void wwav_eof(struct aproc *, struct abuf *);
void wwav_hup(struct aproc *, struct abuf *);
void wwav_done(struct aproc *);
struct aproc *wwav_new(struct file *);
void wav_setvol(void *, unsigned);
void wav_startreq(void *);
void wav_stopreq(void *);
void wav_locreq(void *, unsigned);
void wav_quitreq(void *);
struct ctl_ops ctl_wavops = {
wav_setvol,
wav_startreq,
wav_stopreq,
wav_locreq,
wav_quitreq
};
struct aproc_ops rwav_ops = {
"rwav",
rwav_in,
rwav_out,
rfile_eof,
rfile_hup,
NULL, /* newin */
NULL, /* newout */
NULL, /* ipos */
NULL, /* opos */
rwav_done
};
struct aproc_ops wwav_ops = {
"wwav",
wwav_in,
wwav_out,
wfile_eof,
wfile_hup,
NULL, /* newin */
NULL, /* newout */
NULL, /* ipos */
NULL, /* opos */
wwav_done
};
#ifdef DEBUG
/*
* print the given wav structure
*/
void
wav_dbg(struct wav *f)
{
static char *pstates[] = { "ini", "sta", "rdy", "run", "fai" };
struct aproc *midi = f->dev ? f->dev->midi : NULL;
dbg_puts("wav(");
if (f->slot >= 0 && APROC_OK(midi)) {
dbg_puts(midi->u.ctl.slot[f->slot].name);
dbg_putu(midi->u.ctl.slot[f->slot].unit);
} else
dbg_puts(f->pipe.file.name);
dbg_puts(")/");
dbg_puts(pstates[f->pstate]);
}
#endif
/*
* convert ``count'' samples using the given char->short map
*/
void
wav_conv(unsigned char *data, unsigned count, short *map)
{
unsigned i;
unsigned char *iptr;
short *optr;
iptr = data + count;
optr = (short *)data + count;
for (i = count; i > 0; i--) {
--optr;
--iptr;
*optr = map[*iptr];
}
}
/*
* read method of the file structure
*/
unsigned
wav_read(struct file *file, unsigned char *data, unsigned count)
{
struct wav *f = (struct wav *)file;
unsigned n;
if (f->map)
count /= sizeof(short);
if (f->rbytes >= 0 && count > f->rbytes) {
count = f->rbytes; /* file->rbytes fits in count */
if (count == 0) {
#ifdef DEBUG
if (debug_level >= 3) {
wav_dbg(f);
dbg_puts(": read complete\n");
}
#endif
if (!f->mmc)
file_eof(&f->pipe.file);
return 0;
}
}
n = pipe_read(file, data, count);
if (n == 0)
return 0;
if (f->rbytes >= 0)
f->rbytes -= n;
if (f->map) {
wav_conv(data, n, f->map);
n *= sizeof(short);
}
return n;
}
/*
* write method of the file structure
*/
unsigned
wav_write(struct file *file, unsigned char *data, unsigned count)
{
struct wav *f = (struct wav *)file;
unsigned n;
if (f->wbytes >= 0 && count > f->wbytes) {
count = f->wbytes; /* wbytes fits in count */
if (count == 0) {
#ifdef DEBUG
if (debug_level >= 3) {
wav_dbg(f);
dbg_puts(": write complete\n");
}
#endif
file_hup(&f->pipe.file);
return 0;
}
}
n = pipe_write(file, data, count);
if (f->wbytes >= 0)
f->wbytes -= n;
f->endpos += n;
return n;
}
/*
* close method of the file structure
*/
void
wav_close(struct file *file)
{
struct wav *f = (struct wav *)file;
if (f->mode & MODE_RECMASK) {
pipe_trunc(&f->pipe.file, f->endpos);
if (f->hdr == HDR_WAV) {
wav_writehdr(f->pipe.fd,
&f->hpar,
&f->startpos,
f->endpos - f->startpos);
}
}
pipe_close(file);
if (f->dev) {
dev_unref(f->dev);
f->dev = NULL;
}
}
/*
* attach play (rec) abuf structure to the device and
* switch to the ``RUN'' state; the play abug must not be empty
*/
int
wav_attach(struct wav *f, int force)
{
struct abuf *rbuf = NULL, *wbuf = NULL;
struct dev *d = f->dev;
if (f->mode & MODE_PLAY)
rbuf = LIST_FIRST(&f->pipe.file.rproc->outs);
if (f->mode & MODE_RECMASK)
wbuf = LIST_FIRST(&f->pipe.file.wproc->ins);
f->pstate = WAV_RUN;
#ifdef DEBUG
if (debug_level >= 3) {
wav_dbg(f);
dbg_puts(": attaching\n");
}
#endif
/*
* start the device (dev_getpos() and dev_attach() must
* be called on a started device
*/
dev_wakeup(d);
dev_attach(d, f->pipe.file.name, f->mode,
rbuf, &f->hpar, f->join ? d->opar.cmax - d->opar.cmin + 1 : 0,
wbuf, &f->hpar, f->join ? d->ipar.cmax - d->ipar.cmin + 1 : 0,
f->xrun, f->maxweight);
if (f->mode & MODE_PLAY)
dev_setvol(d, rbuf, MIDI_TO_ADATA(f->vol));
return 1;
}
/*
* allocate the play (rec) abuf structure; if this is a
* file to record, then attach it to the device
*
* XXX: buffer size should be larger than dev_bufsz, because
* in non-server mode we don't prime play buffers with
* silence
*/
void
wav_allocbuf(struct wav *f)
{
struct abuf *buf;
struct dev *d = f->dev;
unsigned nfr;
f->pstate = WAV_START;
if (f->mode & MODE_PLAY) {
nfr = 2 * d->bufsz * f->hpar.rate / d->rate;
buf = abuf_new(nfr, &f->hpar);
aproc_setout(f->pipe.file.rproc, buf);
abuf_fill(buf);
if (!ABUF_WOK(buf) || (f->pipe.file.state & FILE_EOF))
f->pstate = WAV_READY;
}
if (f->mode & MODE_RECMASK) {
nfr = 2 * d->bufsz * f->hpar.rate / d->rate;
buf = abuf_new(nfr, &f->hpar);
aproc_setin(f->pipe.file.wproc, buf);
f->pstate = WAV_READY;
}
#ifdef DEBUG
if (debug_level >= 3) {
wav_dbg(f);
dbg_puts(": allocating buffers\n");
}
#endif
if (f->pstate == WAV_READY && ctl_slotstart(d->midi, f->slot))
(void)wav_attach(f, 0);
}
/*
* free abuf structure and switch to the ``INIT'' state
*/
void
wav_freebuf(struct wav *f)
{
struct abuf *rbuf = NULL, *wbuf = NULL;
if (f->mode & MODE_PLAY)
rbuf = LIST_FIRST(&f->pipe.file.rproc->outs);
if (f->mode & MODE_RECMASK)
wbuf = LIST_FIRST(&f->pipe.file.wproc->ins);
f->pstate = WAV_INIT;
#ifdef DEBUG
if (debug_level >= 3) {
wav_dbg(f);
dbg_puts(": freeing buffers\n");
}
#endif
if (rbuf || wbuf)
ctl_slotstop(f->dev->midi, f->slot);
if (rbuf)
abuf_eof(rbuf);
if (wbuf)
abuf_hup(wbuf);
}
/*
* switch to the ``INIT'' state performing
* necessary actions to reach it
*/
void
wav_reset(struct wav *f)
{
switch (f->pstate) {
case WAV_START:
case WAV_READY:
if (ctl_slotstart(f->dev->midi, f->slot))
(void)wav_attach(f, 1);
/* PASSTHROUGH */
case WAV_RUN:
wav_freebuf(f);
f->pstate = WAV_INIT;
/* PASSTHROUGH */
case WAV_INIT:
case WAV_FAILED:
/* nothing yet */
break;
}
}
/*
* terminate the wav reader/writer
*/
void
wav_exit(struct wav *f)
{
/* XXX: call file_close() ? */
if (f->mode & MODE_PLAY) {
aproc_del(f->pipe.file.rproc);
} else if (f->mode & MODE_RECMASK) {
aproc_del(f->pipe.file.wproc);
}
}
/*
* seek to f->mmcpos and prepare to start, close
* the file on error.
*/
int
wav_seekmmc(struct wav *f)
{
/*
* don't go beyond the end-of-file, if so
* put it in INIT state so it dosn't start
*/
if (f->mmcpos > f->endpos) {
wav_reset(f);
f->pstate = WAV_FAILED;
/*
* don't make other stream wait for us
*/
if (f->slot >= 0)
ctl_slotstart(f->dev->midi, f->slot);
return 0;
}
if (!pipe_seek(&f->pipe.file, f->mmcpos)) {
wav_exit(f);
return 0;
}
if (f->hdr == HDR_WAV)
f->wbytes = WAV_DATAMAX - f->mmcpos;
f->rbytes = f->endpos - f->mmcpos;
wav_reset(f);
wav_allocbuf(f);
return 1;
}
/*
* read samples from the file and possibly start it
*/
int
wav_rdata(struct wav *f)
{
struct aproc *p;
struct abuf *obuf;
p = f->pipe.file.rproc;
obuf = LIST_FIRST(&p->outs);
if (obuf == NULL)
return 0;
if (!ABUF_WOK(obuf) || !(f->pipe.file.state & FILE_ROK))
return 0;
if (!rfile_do(p, obuf->len, NULL))
return 0;
switch (f->pstate) {
case WAV_START:
if (!ABUF_WOK(obuf) || (f->pipe.file.state & FILE_EOF))
f->pstate = WAV_READY;
/* PASSTHROUGH */
case WAV_READY:
if (ctl_slotstart(f->dev->midi, f->slot))
(void)wav_attach(f, 0);
break;
#ifdef DEBUG
case WAV_RUN:
break;
default:
wav_dbg(f);
dbg_puts(": bad state\n");
dbg_panic();
#endif
}
if (f->rbytes == 0 && f->mmc) {
#ifdef DEBUG
if (debug_level >= 3) {
wav_dbg(f);
dbg_puts(": trying to restart\n");
}
#endif
if (!wav_seekmmc(f))
return 0;
}
return 1;
}
int
wav_wdata(struct wav *f)
{
struct aproc *p;
struct abuf *ibuf;
if (!(f->pipe.file.state & FILE_WOK))
return 0;
p = f->pipe.file.wproc;
ibuf = LIST_FIRST(&p->ins);
if (ibuf == NULL)
return 0;
if (!ABUF_ROK(ibuf))
return 0;
if (!wfile_do(p, ibuf->len, NULL))
return 0;
return 1;
}
/*
* callback to set the volume, invoked by the MIDI control code
*/
void
wav_setvol(void *arg, unsigned vol)
{
struct wav *f = (struct wav *)arg;
struct abuf *rbuf;
f->vol = vol;
if ((f->mode & MODE_PLAY) && f->pstate == WAV_RUN) {
rbuf = LIST_FIRST(&f->pipe.file.rproc->outs);
dev_setvol(f->dev, rbuf, MIDI_TO_ADATA(vol));
}
}
/*
* callback to start the stream, invoked by the MIDI control code
*/
void
wav_startreq(void *arg)
{
struct wav *f = (struct wav *)arg;
switch (f->pstate) {
case WAV_FAILED:
#ifdef DEBUG
if (debug_level >= 2) {
wav_dbg(f);
dbg_puts(": skipped (failed to seek)\n");
}
#endif
return;
case WAV_READY:
if (f->mode & MODE_RECMASK)
f->endpos = f->startpos;
(void)wav_attach(f, 0);
break;
#ifdef DEBUG
default:
wav_dbg(f);
dbg_puts(": not in READY state\n");
dbg_panic();
break;
#endif
}
}
/*
* callback to stop the stream, invoked by the MIDI control code
*/
void
wav_stopreq(void *arg)
{
struct wav *f = (struct wav *)arg;
#ifdef DEBUG
if (debug_level >= 2) {
wav_dbg(f);
dbg_puts(": stopping");
if (f->pstate != WAV_FAILED && (f->mode & MODE_RECMASK)) {
dbg_puts(", ");
dbg_putu(f->endpos);
dbg_puts(" bytes recorded");
}
dbg_puts("\n");
}
#endif
if (!f->mmc) {
wav_exit(f);
return;
}
(void)wav_seekmmc(f);
}
/*
* callback to relocate the stream, invoked by the MIDI control code
* on a stopped stream
*/
void
wav_locreq(void *arg, unsigned mmc)
{
struct wav *f = (struct wav *)arg;
#ifdef DEBUG
if (f->pstate == WAV_RUN) {
wav_dbg(f);
dbg_puts(": in RUN state\n");
dbg_panic();
}
#endif
f->mmcpos = f->startpos +
((off_t)mmc * f->hpar.rate / MTC_SEC) * aparams_bpf(&f->hpar);
(void)wav_seekmmc(f);
}
/*
* Callback invoked when slot is gone
*/
void
wav_quitreq(void *arg)
{
struct wav *f = (struct wav *)arg;
#ifdef DEBUG
if (debug_level >= 3) {
wav_dbg(f);
dbg_puts(": slot gone\n");
}
#endif
if (f->pstate != WAV_RUN)
wav_exit(f);
}
/*
* create a file reader in the ``INIT'' state
*/
struct wav *
wav_new_in(struct fileops *ops,
struct dev *dev, unsigned mode, char *name, unsigned hdr,
struct aparams *par, unsigned xrun, unsigned volctl, int tr, int join)
{
int fd;
struct wav *f;
if (name != NULL) {
fd = open(name, O_RDONLY | O_NONBLOCK, 0666);
if (fd < 0) {
perror(name);
return NULL;
}
} else {
name = "stdin";
fd = STDIN_FILENO;
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
perror(name);
}
f = (struct wav *)pipe_new(ops, fd, name);
if (f == NULL) {
close(fd);
return NULL;
}
if (!dev_ref(dev)) {
close(fd);
return NULL;
}
if (!(dev->mode & MODE_PLAY)) {
#ifdef DEBUG
dbg_puts(name);
dbg_puts(": device can't play\n");
#endif
close(fd);
dev_unref(dev);
}
f->dev = dev;
if (hdr == HDR_WAV) {
if (!wav_readhdr(f->pipe.fd, par, &f->startpos, &f->rbytes, &f->map)) {
file_del((struct file *)f);
return NULL;
}
f->endpos = f->startpos + f->rbytes;
} else {
f->startpos = 0;
f->endpos = pipe_endpos(&f->pipe.file);
if (f->endpos > 0) {
if (!pipe_seek(&f->pipe.file, 0)) {
file_del((struct file *)f);
return NULL;
}
f->rbytes = f->endpos;
} else
f->rbytes = -1;
f->map = NULL;
}
f->mmc = tr;
f->join = join;
f->mode = mode;
f->hpar = *par;
f->hdr = 0;
f->xrun = xrun;
f->maxweight = MIDI_TO_ADATA(volctl);
f->slot = ctl_slotnew(f->dev->midi, "play", &ctl_wavops, f, 1);
rwav_new((struct file *)f);
wav_allocbuf(f);
#ifdef DEBUG
if (debug_level >= 2) {
dbg_puts(name);
dbg_puts(": playing ");
dbg_putu(f->startpos);
dbg_puts("..");
dbg_putu(f->endpos);
dbg_puts(": playing ");
aparams_dbg(par);
if (f->mmc)
dbg_puts(", mmc");
dbg_puts("\n");
}
#endif
return f;
}
/*
* create a file writer in the ``INIT'' state
*/
struct wav *
wav_new_out(struct fileops *ops,
struct dev *dev, unsigned mode, char *name, unsigned hdr,
struct aparams *par, unsigned xrun, int tr, int join)
{
int fd;
struct wav *f;
if (name == NULL) {
name = "stdout";
fd = STDOUT_FILENO;
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
perror(name);
} else {
fd = open(name,
O_WRONLY | O_TRUNC | O_CREAT | O_NONBLOCK, 0666);
if (fd < 0) {
perror(name);
return NULL;
}
}
f = (struct wav *)pipe_new(ops, fd, name);
if (f == NULL) {
close(fd);
return NULL;
}
if (!dev_ref(dev)) {
close(fd);
return NULL;
}
if (!(dev->mode & MODE_RECMASK)) {
#ifdef DEBUG
dbg_puts(name);
dbg_puts(": device can't record\n");
#endif
close(fd);
dev_unref(dev);
}
f->dev = dev;
if (hdr == HDR_WAV) {
par->le = 1;
par->sig = (par->bits <= 8) ? 0 : 1;
par->bps = (par->bits + 7) / 8;
if (!wav_writehdr(f->pipe.fd, par, &f->startpos, 0)) {
file_del((struct file *)f);
return NULL;
}
f->wbytes = WAV_DATAMAX;
f->endpos = f->startpos;
} else {
f->wbytes = -1;
f->startpos = f->endpos = 0;
}
f->mmc = tr;
f->join = join;
f->mode = mode;
f->hpar = *par;
f->hdr = hdr;
f->xrun = xrun;
f->slot = ctl_slotnew(f->dev->midi, "rec", &ctl_wavops, f, 1);
wwav_new((struct file *)f);
wav_allocbuf(f);
#ifdef DEBUG
if (debug_level >= 2) {
dbg_puts(name);
dbg_puts(": recording ");
aparams_dbg(par);
dbg_puts("\n");
}
#endif
return f;
}
void
rwav_done(struct aproc *p)
{
struct wav *f = (struct wav *)p->u.io.file;
if (f->slot >= 0)
ctl_slotdel(f->dev->midi, f->slot);
f->slot = -1;
rfile_done(p);
}
int
rwav_in(struct aproc *p, struct abuf *ibuf_dummy)
{
struct wav *f = (struct wav *)p->u.io.file;
struct abuf *obuf;
if (!wav_rdata(f))
return 0;
obuf = LIST_FIRST(&p->outs);
if (obuf && f->pstate >= WAV_RUN) {
if (!abuf_flush(obuf))
return 0;
}
return 1;
}
int
rwav_out(struct aproc *p, struct abuf *obuf)
{
struct wav *f = (struct wav *)p->u.io.file;
if (f->pipe.file.state & FILE_RINUSE)
return 0;
for (;;) {
if (!wav_rdata(f))
return 0;
}
return 1;
}
struct aproc *
rwav_new(struct file *f)
{
struct aproc *p;
p = aproc_new(&rwav_ops, f->name);
p->u.io.file = f;
p->u.io.partial = 0;;
f->rproc = p;
return p;
}
void
wwav_done(struct aproc *p)
{
struct wav *f = (struct wav *)p->u.io.file;
if (f->slot >= 0)
ctl_slotdel(f->dev->midi, f->slot);
f->slot = -1;
wfile_done(p);
}
int
wwav_in(struct aproc *p, struct abuf *ibuf)
{
struct wav *f = (struct wav *)p->u.io.file;
if (f->pipe.file.state & FILE_WINUSE)
return 0;
for (;;) {
if (!wav_wdata(f))
return 0;
}
return 1;
}
int
wwav_out(struct aproc *p, struct abuf *obuf_dummy)
{
struct abuf *ibuf = LIST_FIRST(&p->ins);
struct wav *f = (struct wav *)p->u.io.file;
if (ibuf && f->pstate == WAV_RUN) {
if (!abuf_fill(ibuf))
return 0;
}
if (!wav_wdata(f))
return 0;
return 1;
}
struct aproc *
wwav_new(struct file *f)
{
struct aproc *p;
p = aproc_new(&wwav_ops, f->name);
p->u.io.file = f;
p->u.io.partial = 0;;
f->wproc = p;
return p;
}
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