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soundmodem/soundcard/audioio.c
Matt Grice f4c4438e0e First commit
2018-06-17 22:19:22 +10:00

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/*****************************************************************************/
/*
* audioio.c -- Audio I/O.
*
* Copyright (C) 1999-2000
* Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
*/
/*****************************************************************************/
#define _GNU_SOURCE
#define _REENTRANT
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "soundio.h"
#include "audioio.h"
#include <sys/types.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <pthread.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <errno.h>
#ifdef HAVE_STROPTS_H
#include <stropts.h>
#endif
#ifdef HAVE_SYS_AUDIOIO_H
#include <sys/audioio.h>
#endif
#ifdef HAVE_SYS_SOUNDCARD_H
#include <sys/soundcard.h>
#endif
/* ---------------------------------------------------------------------- */
#define AUDIOIBUFSIZE 4096
struct audioio_unix {
struct audioio audioio;
char audiopath[64];
unsigned int samplerate;
int audiofd;
unsigned int fragsize;
pthread_mutex_t iomutex;
pthread_cond_t iocond;
unsigned int flags;
unsigned int ptr;
u_int16_t ptime;
int16_t ibuf[AUDIOIBUFSIZE];
};
#if defined(HAVE_SYS_SOUNDCARD_H)
#define AUDIOPATH "/dev/dsp"
#else
#define AUDIOPATH "/dev/audio"
#endif
struct modemparams ioparams_soundcard[] = {
{ "device", "Audio Driver", "Path name of the audio (soundcard) driver", AUDIOPATH, MODEMPAR_COMBO,
{ c: { { AUDIOPATH, AUDIOPATH "1", AUDIOPATH "2", AUDIOPATH "3" } } } },
{ "halfdup", "Half Duplex", "Force operating the Sound Driver in Half Duplex mode", "0", MODEMPAR_CHECKBUTTON },
{ NULL, }
};
#undef AUDIOPATH
#define CAP_HALFDUPLEX 0x100
#define FLG_READING 0x1000
#define FLG_HALFDUPLEXTX 0x2000
#define FLG_TERMINATERX 0x4000
#ifndef INFTIM
#define INFTIM (-1)
#endif
/* ---------------------------------------------------------------------- */
static void iorelease(struct audioio *aio);
static void iowrite(struct audioio *aio, const int16_t *samples, unsigned int nr);
static void ioread(struct audioio *aio, int16_t *samples, unsigned int nr, u_int16_t tim);
static u_int16_t iocurtime(struct audioio *aio);
static void iotransmitstart(struct audioio *aio);
static void iotransmitstop(struct audioio *aio);
static void ioterminateread(struct audioio *aio);
/* ---------------------------------------------------------------------- */
static inline int iomodetofmode(unsigned int flags)
{
switch (flags & IO_RDWR) {
default:
case IO_RDONLY:
return O_RDONLY;
case IO_WRONLY:
return O_WRONLY;
case IO_RDWR:
return O_RDWR;
}
}
/* ---------------------------------------------------------------------- */
/*
* Linux OSS audio
*/
#if defined(HAVE_SYS_SOUNDCARD_H)
struct audioio *ioopen_soundcard(unsigned int *samplerate, unsigned int flags, const char *params[])
{
int sndparam, i;
const char *audiopath = params[0];
audio_buf_info abinfoi, abinfoo;
struct audioio_unix *audioio;
audioio = calloc(1, sizeof(struct audioio_unix));
if (!audioio)
return NULL;
audioio->audioio.release = iorelease;
if (flags & IO_RDONLY) {
audioio->audioio.terminateread = ioterminateread;
audioio->audioio.read = ioread;
audioio->audioio.curtime = iocurtime;
}
if (flags & IO_WRONLY) {
audioio->audioio.transmitstart = iotransmitstart;
audioio->audioio.transmitstop = iotransmitstop;
audioio->audioio.write = iowrite;
}
audioio->samplerate = *samplerate;
pthread_cond_init(&audioio->iocond, NULL);
pthread_mutex_init(&audioio->iomutex, NULL);
audioio->flags = flags & IO_RDWR;
audioio->ptr = audioio->ptime = 0;
if (!audiopath)
audiopath = "/dev/dsp";
strncpy(audioio->audiopath, audiopath, sizeof(audioio->audiopath));
logprintf(MLOG_DEBUG, "audio: starting \"%s\"\n", audioio->audiopath);
if ((audioio->audiofd = open(audioio->audiopath, iomodetofmode(audioio->flags))) < 0) {
logprintf(MLOG_ERROR, "audio: Error, cannot open \"%s\"\n", audioio->audiopath);
free(audioio);
return NULL;
}
if (ioctl(audioio->audiofd, SNDCTL_DSP_GETCAPS, &sndparam) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot get capabilities\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
if (!((~audioio->flags) & IO_RDWR)) {
if (params[1] && params[1][0] != '0') {
audioio->flags |= CAP_HALFDUPLEX;
logprintf(MLOG_INFO, "audio: forcing half duplex mode\n");
} else if (!(sndparam & DSP_CAP_DUPLEX)) {
audioio->flags |= CAP_HALFDUPLEX;
logprintf(MLOG_INFO, "audio: Soundcard does not support full duplex, using half duplex mode\n");
} else if (ioctl(audioio->audiofd, SNDCTL_DSP_SETDUPLEX, 0) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot set duplex mode\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
}
/* set fragment size so we have approx. 10-20ms wakeup latency */
i = audioio->samplerate / 50;
sndparam = 0xffff0000;
while (i) {
sndparam++;
i >>= 1;
}
audioio->fragsize = sndparam;
if (ioctl(audioio->audiofd, SNDCTL_DSP_SETFRAGMENT, &sndparam) == -1)
logprintf(MLOG_ERROR, "audio: Error, cannot set fragment size\n");
sndparam = AFMT_S16_LE; /* we want 16 bits/sample signed */
/* little endian; works only on little endian systems! */
if (ioctl(audioio->audiofd, SNDCTL_DSP_SETFMT, &sndparam) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot set sample size\n");
free(audioio);
return NULL;
}
if (sndparam != AFMT_S16_LE) {
logprintf(MLOG_ERROR, "audio: Error, cannot set sample size to 16 bits\n");
free(audioio);
return NULL;
}
sndparam = 0; /* we want only 1 channel */
if (ioctl(audioio->audiofd, SNDCTL_DSP_STEREO, &sndparam) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot set the channel number\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
if (sndparam != 0) {
logprintf(MLOG_ERROR, "audio: Error, cannot set the channel number to 1\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
sndparam = audioio->samplerate;
if (ioctl(audioio->audiofd, SNDCTL_DSP_SPEED, &sndparam) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot set the sample rate\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
audioio->samplerate = sndparam;
if (ioctl(audioio->audiofd, SNDCTL_DSP_NONBLOCK, 0) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot set nonblocking mode\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
memset(&abinfoi, 0, sizeof(abinfoi));
memset(&abinfoo, 0, sizeof(abinfoo));
if ((flags & IO_RDONLY) && ioctl(audioio->audiofd, SNDCTL_DSP_GETISPACE, &abinfoi) == -1)
logprintf(MLOG_ERROR, "audio: Error, cannot get input buffer parameters\n");
else if ((flags & IO_WRONLY) && ioctl(audioio->audiofd, SNDCTL_DSP_GETOSPACE, &abinfoo) == -1)
logprintf(MLOG_ERROR, "audio: Error, cannot get output buffer parameters\n");
else {
logprintf(MLOG_INFO, "audio: sample rate %u input fragsz %u numfrags %u output fragsz %u numfrags %u\n",
audioio->samplerate, abinfoi.fragsize, abinfoi.fragstotal, abinfoo.fragsize, abinfoo.fragstotal);
}
*samplerate = audioio->samplerate;
return &audioio->audioio;
}
static inline void iotxend(struct audioio_unix *audioio)
{
int sndparam;
short s;
fcntl(audioio->audiofd, F_SETFL, fcntl(audioio->audiofd, F_GETFL, 0) & ~O_NONBLOCK);
if (ioctl(audioio->audiofd, SNDCTL_DSP_SYNC, 0))
logerr(MLOG_ERROR, "ioctl: SNDCTL_DSP_SYNC");
fcntl(audioio->audiofd, F_SETFL, fcntl(audioio->audiofd, F_GETFL, 0) | O_NONBLOCK);
if (!(audioio->flags & CAP_HALFDUPLEX))
return;
/* the only reliable method seems to be to reopen the audio device :( */
close(audioio->audiofd);
if ((audioio->audiofd = open(audioio->audiopath, O_RDWR)) < 0)
logprintf(MLOG_FATAL, "audio: Error, cannot open \"%s\"\n", audioio->audiopath);
/* set fragment size so we have approx. 10-20ms wakeup latency */
sndparam = audioio->fragsize;
if (ioctl(audioio->audiofd, SNDCTL_DSP_SETFRAGMENT, &sndparam) == -1)
logprintf(MLOG_ERROR, "audio: Error, cannot set fragment size\n");
sndparam = AFMT_S16_LE; /* we want 16 bits/sample signed */
/* little endian; works only on little endian systems! */
if (ioctl(audioio->audiofd, SNDCTL_DSP_SETFMT, &sndparam) == -1)
logprintf(MLOG_FATAL, "audio: Error, cannot set sample size\n");
if (sndparam != AFMT_S16_LE)
logprintf(MLOG_FATAL, "audio: Error, cannot set sample size to 16 bits\n");
sndparam = 0; /* we want only 1 channel */
if (ioctl(audioio->audiofd, SNDCTL_DSP_STEREO, &sndparam) == -1)
logprintf(MLOG_FATAL, "audio: Error, cannot set the channel number\n");
if (sndparam != 0)
logprintf(MLOG_FATAL, "audio: Error, cannot set the channel number to 1\n");
sndparam = audioio->samplerate;
if (ioctl(audioio->audiofd, SNDCTL_DSP_SPEED, &sndparam) == -1)
logprintf(MLOG_FATAL, "audio: Error, cannot set the sample rate\n");
if (ioctl(audioio->audiofd, SNDCTL_DSP_NONBLOCK, 0) == -1)
logprintf(MLOG_FATAL, "audio: Error, cannot set nonblocking mode\n");
read(audioio->audiofd, &s, sizeof(s));
}
static inline void iotxstart(struct audioio_unix *audioio)
{
int sndparam;
short s = 0;
if (!(audioio->flags & CAP_HALFDUPLEX)) {
write(audioio->audiofd, &s, sizeof(s));
return;
}
/* the only reliable method seems to be to reopen the audio device :( */
close(audioio->audiofd);
if ((audioio->audiofd = open(audioio->audiopath, O_RDWR)) < 0)
logprintf(MLOG_FATAL, "audio: Error, cannot open \"%s\"\n", audioio->audiopath);
/* set fragment size so we have approx. 10-20ms wakeup latency */
sndparam = audioio->fragsize;
if (ioctl(audioio->audiofd, SNDCTL_DSP_SETFRAGMENT, &sndparam) == -1)
logprintf(MLOG_ERROR, "audio: Error, cannot set fragment size\n");
sndparam = AFMT_S16_LE; /* we want 16 bits/sample signed */
/* little endian; works only on little endian systems! */
if (ioctl(audioio->audiofd, SNDCTL_DSP_SETFMT, &sndparam) == -1)
logprintf(MLOG_FATAL, "audio: Error, cannot set sample size\n");
if (sndparam != AFMT_S16_LE)
logprintf(MLOG_FATAL, "audio: Error, cannot set sample size to 16 bits\n");
sndparam = 0; /* we want only 1 channel */
if (ioctl(audioio->audiofd, SNDCTL_DSP_STEREO, &sndparam) == -1)
logprintf(MLOG_FATAL, "audio: Error, cannot set the channel number\n");
if (sndparam != 0)
logprintf(MLOG_FATAL, "audio: Error, cannot set the channel number to 1\n");
sndparam = audioio->samplerate;
if (ioctl(audioio->audiofd, SNDCTL_DSP_SPEED, &sndparam) == -1)
logprintf(MLOG_FATAL, "audio: Error, cannot set the sample rate\n");
if (ioctl(audioio->audiofd, SNDCTL_DSP_NONBLOCK, 0) == -1)
logprintf(MLOG_FATAL, "audio: Error, cannot set nonblocking mode\n");
sndparam = write(audioio->audiofd, &s, sizeof(s));
}
/* ---------------------------------------------------------------------- */
/*
* Sun audio
*/
#elif defined(HAVE_SYS_AUDIOIO_H)
static inline int iomodetoflush(unsigned int flags)
{
switch (flags & IO_RDWR) {
default:
case IO_RDONLY:
return FLUSHR;
case IO_WRONLY:
return FLUSHW;
case IO_RDWR:
return FLUSHRW;
}
}
struct audioio *ioopen_soundcard(unsigned int *samplerate, unsigned int flags, const char *params[])
{
static int srtable[] = {
8000, 9600, 11025, 16000, 18900, 22050, 32000, 37800, 44100, 48000, -1
};
int *srptr = srtable;
const char *audiopath = params[0];
audio_info_t audioinfo;
audio_info_t audioinfo2;
audio_device_t audiodev;
struct audioio_unix *audioio;
audioio = calloc(1, sizeof(struct audioio_unix));
if (!audioio)
return NULL;
audioio->audioio.release = iorelease;
if (flags & IO_RDONLY) {
audioio->audioio.terminateread = ioterminateread;
audioio->audioio.read = ioread;
audioio->audioio.curtime = iocurtime;
}
if (flags & IO_WRONLY) {
audioio->audioio.transmitstart = iotransmitstart;
audioio->audioio.transmitstop = iotransmitstop;
audioio->audioio.write = iowrite;
}
audioio->samplerate = *samplerate;
pthread_cond_init(&audioio->iocond, NULL);
pthread_mutex_init(&audioio->iomutex, NULL);
audioio->flags = flags & IO_RDWR;
audioio->ptr = audioio->ptime = 0;
if (!audiopath)
audiopath = "/dev/audio";
logprintf(MLOG_DEBUG, "audio: starting \"%s\"\n", audiopath);
if ((audioio->audiofd = open(audiopath, iomodetofmode(audioio->flags))) < 0) {
logprintf(MLOG_ERROR, "audio: Error, cannot open \"%s\"\n", audiopath);
free(audioio);
return NULL;
}
if (ioctl(audioio->audiofd, AUDIO_GETDEV, &audiodev) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot get audio dev\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
logprintf(MLOG_DEBUG, "audio: Audio device: name %s, ver %s, config %s\n",
audiodev.name, audiodev.version, audiodev.config);
AUDIO_INITINFO(&audioinfo);
while (srptr[0] < audioio->samplerate && srptr[1] != -1)
srptr++;
if (audioio->flags & IO_WRONLY) {
audioinfo.play.sample_rate = srptr[0];
audioinfo.play.channels = 1;
audioinfo.play.precision = 16;
audioinfo.play.encoding = AUDIO_ENCODING_LINEAR;
}
if (audioio->flags & IO_RDONLY) {
audioinfo.record.sample_rate = srptr[0];
audioinfo.record.channels = 1;
audioinfo.record.precision = 16;
audioinfo.record.encoding = AUDIO_ENCODING_LINEAR;
//audioinfo.record.gain = 0x20;
audioinfo.record.port = AUDIO_LINE_IN;
//audioinfo.monitor_gain = 0;
}
if (ioctl(audioio->audiofd, AUDIO_SETINFO, &audioinfo) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot set audio params\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
if (ioctl(audioio->audiofd, I_FLUSH, iomodetoflush(audioio->flags)) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot flush\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
if (ioctl(audioio->audiofd, AUDIO_GETINFO, &audioinfo2) == -1) {
logprintf(MLOG_ERROR, "audio: Error, cannot get audio params\n");
close(audioio->audiofd);
free(audioio);
return NULL;
}
audioio->samplerate = audioinfo2.record.sample_rate;
if (params[1] && params[1][0] != '0') {
audioio->flags |= CAP_HALFDUPLEX;
logprintf(MLOG_INFO, "audio: forcing half duplex mode\n");
}
fcntl(audioio->audiofd, F_SETFL, fcntl(audioio->audiofd, F_GETFL, 0) | O_NONBLOCK);
logprintf(MLOG_INFO, "audio: sample rate %u input buffer %u output buffer %u\n",
audioio->samplerate, audioinfo2.record.buffer_size, audioinfo2.play.buffer_size);
*samplerate = audioio->samplerate;
return &audioio->audioio;
}
static inline void iotxend(struct audioio_unix *audioio)
{
if (ioctl(audioio->audiofd, AUDIO_DRAIN, 0))
logerr(MLOG_ERROR, "ioctl: AUDIO_DRAIN");
}
static inline void iotxstart(struct audioio_unix *audioio)
{
short s = 0;
write(audioio->audiofd, &s, sizeof(s));
}
#endif
/* ---------------------------------------------------------------------- */
void ioinit_soundcard(void)
{
}
static void iorelease(struct audioio *aio)
{
struct audioio_unix *audioio = (struct audioio_unix *)aio;
if (audioio->audiofd != -1) {
close(audioio->audiofd);
pthread_cond_destroy(&audioio->iocond);
pthread_mutex_destroy(&audioio->iomutex);
}
audioio->audiofd = -1;
audioio->flags = audioio->ptr = audioio->ptime = 0;
free(audioio);
}
static void iowrite(struct audioio *aio, const int16_t *samples, unsigned int nr)
{
struct audioio_unix *audioio = (struct audioio_unix *)aio;
unsigned char *p = (unsigned char *)samples;
unsigned int sz = nr * sizeof(samples[0]);
struct pollfd pfd;
int i;
pfd.fd = audioio->audiofd;
pfd.events = POLLOUT;
while (sz > 0) {
poll(&pfd, 1, 1000);
i = write(audioio->audiofd, p, sz);
#if 0
logprintf(10, "audio: write: sz %u ret %d\n", sz, i);
#endif
#if 0
{
audio_buf_info abinfo;
count_info cinfo;
if (ioctl(audioio->audiofd, SNDCTL_DSP_GETOSPACE, &abinfo))
logerr(MLOG_FATAL, "audio: SNDCTL_DSP_GETOSPACE");
if (ioctl(audioio->audiofd, SNDCTL_DSP_GETOPTR, &cinfo))
logerr(MLOG_FATAL, "audio: SNDCTL_DSP_GETOSPACE");
logprintf(10, "audio: driver: hwptr %u count %u bufsz %u\n", cinfo.ptr, abinfo.bytes, abinfo.fragsize * abinfo.fragstotal);
}
#endif
if (i == -1) {
if (errno == EINTR || errno == EAGAIN)
continue;
logerr(MLOG_FATAL, "audio: write");
}
p += i;
sz -= i;
}
}
static void ioread(struct audioio *aio, int16_t *samples, unsigned int nr, u_int16_t tim)
{
struct audioio_unix *audioio = (struct audioio_unix *)aio;
struct pollfd pfd;
int16_t ibuf[AUDIOIBUFSIZE/8];
int16_t *ip;
unsigned int p;
int i;
pthread_mutex_lock(&audioio->iomutex);
while (nr > 0) {
if (audioio->flags & FLG_TERMINATERX) {
pthread_mutex_unlock(&audioio->iomutex);
pthread_exit(NULL);
}
i = (signed)(int16_t)(audioio->ptime - tim);
if (i > AUDIOIBUFSIZE) {
pthread_mutex_unlock(&audioio->iomutex);
i -= AUDIOIBUFSIZE;
if (i > nr)
i = nr;
memset(samples, 0, i * sizeof(samples[0]));
logprintf(MLOG_ERROR, "ioread: request time %u out of time window [%u,%u)\n", tim, audioio->ptime-AUDIOIBUFSIZE, audioio->ptime);
samples += i;
nr -= i;
tim += i;
pthread_mutex_lock(&audioio->iomutex);
continue;
}
if (i > 0) {
p = (AUDIOIBUFSIZE + audioio->ptr - i) % AUDIOIBUFSIZE;
if (i > nr)
i = nr;
if (i > AUDIOIBUFSIZE-p)
i = AUDIOIBUFSIZE-p;
memcpy(samples, &audioio->ibuf[p], i * sizeof(samples[0]));
nr -= i;
samples += i;
tim += i;
continue;
}
if (audioio->flags & (FLG_READING|FLG_HALFDUPLEXTX)) {
pthread_cond_wait(&audioio->iocond, &audioio->iomutex);
continue;
}
audioio->flags |= FLG_READING;
pthread_mutex_unlock(&audioio->iomutex);
pfd.fd = audioio->audiofd;
pfd.events = POLLIN;
poll(&pfd, 1, 50);
i = read(audioio->audiofd, ibuf, sizeof(ibuf));
if (i == -1) {
if (errno == EINTR || errno == EAGAIN) {
pthread_mutex_lock(&audioio->iomutex);
audioio->flags &= ~FLG_READING;
pthread_cond_broadcast(&audioio->iocond);
continue;
}
logerr(MLOG_FATAL, "audio: read");
}
p = i / 2;
pthread_mutex_lock(&audioio->iomutex);
audioio->flags &= ~FLG_READING;
for (ip = ibuf; p > 0; ) {
i = p;
if (i > AUDIOIBUFSIZE-audioio->ptr)
i = AUDIOIBUFSIZE-audioio->ptr;
memcpy(&audioio->ibuf[audioio->ptr], ip, i * sizeof(audioio->ibuf[0]));
audioio->ptr = (audioio->ptr + i) % AUDIOIBUFSIZE;
audioio->ptime += i;
ip += i;
p -= i;
}
pthread_cond_broadcast(&audioio->iocond);
}
pthread_mutex_unlock(&audioio->iomutex);
}
static u_int16_t iocurtime(struct audioio *aio)
{
struct audioio_unix *audioio = (struct audioio_unix *)aio;
u_int16_t res;
int16_t ibuf[AUDIOIBUFSIZE/8];
int16_t *ip;
unsigned int p;
int i;
pthread_mutex_lock(&audioio->iomutex);
for (;;) {
if (audioio->flags & (FLG_READING|FLG_HALFDUPLEXTX))
break;
audioio->flags |= FLG_READING;
pthread_mutex_unlock(&audioio->iomutex);
i = read(audioio->audiofd, ibuf, sizeof(ibuf));
if (i == 0 || (i == -1 && errno == EAGAIN)) {
pthread_mutex_lock(&audioio->iomutex);
audioio->flags &= ~FLG_READING;
pthread_cond_broadcast(&audioio->iocond);
break;
}
if (i == -1) {
if (errno == EINTR || errno == EAGAIN) {
pthread_mutex_lock(&audioio->iomutex);
audioio->flags &= ~FLG_READING;
pthread_cond_broadcast(&audioio->iocond);
continue;
}
logerr(MLOG_FATAL, "audio: read");
}
p = i / 2;
pthread_mutex_lock(&audioio->iomutex);
audioio->flags &= ~FLG_READING;
for (ip = ibuf; p > 0; ) {
i = p;
if (i > AUDIOIBUFSIZE-audioio->ptr)
i = AUDIOIBUFSIZE-audioio->ptr;
memcpy(&audioio->ibuf[audioio->ptr], ip, i * sizeof(audioio->ibuf[0]));
audioio->ptr = (audioio->ptr + i) % AUDIOIBUFSIZE;
audioio->ptime += i;
ip += i;
p -= i;
}
pthread_cond_broadcast(&audioio->iocond);
}
res = audioio->ptime;
pthread_mutex_unlock(&audioio->iomutex);
return res;
}
static void iotransmitstart(struct audioio *aio)
{
struct audioio_unix *audioio = (struct audioio_unix *)aio;
if (audioio->flags & CAP_HALFDUPLEX) {
pthread_mutex_lock(&audioio->iomutex);
audioio->flags |= FLG_HALFDUPLEXTX;
while (audioio->flags & FLG_READING)
pthread_cond_wait(&audioio->iocond, &audioio->iomutex);
pthread_mutex_unlock(&audioio->iomutex);
}
iotxstart(audioio);
}
static void iotransmitstop(struct audioio *aio)
{
struct audioio_unix *audioio = (struct audioio_unix *)aio;
short sbuf[256];
unsigned int i, j;
#if 0
/* add 20ms tail */
i = audioio->samplerate / 50;
memset(sbuf, 0, sizeof(sbuf));
while (i > 0) {
j = sizeof(sbuf)/sizeof(sbuf[0]);
if (j > i)
j = i;
iowrite(audioio, sbuf, j);
i -= j;
}
#endif
iotxend(audioio);
if (audioio->flags & CAP_HALFDUPLEX) {
pthread_mutex_lock(&audioio->iomutex);
audioio->flags &= ~FLG_HALFDUPLEXTX;
pthread_cond_broadcast(&audioio->iocond);
pthread_mutex_unlock(&audioio->iomutex);
}
}
static void ioterminateread(struct audioio *aio)
{
struct audioio_unix *audioio = (struct audioio_unix *)aio;
pthread_mutex_lock(&audioio->iomutex);
audioio->flags |= FLG_TERMINATERX;
pthread_mutex_unlock(&audioio->iomutex);
pthread_cond_broadcast(&audioio->iocond);
}
/* ---------------------------------------------------------------------- */
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