ref: 23fc5b838d1981362c38ebf99f57be79651120c6
dir: /src/sunaudio.c/
/* Direct to Sun Audio Driver
*
* Added by Chris Bagwell (cbagwell@sprynet.com) on 2/26/96
* Based on oss driver.
*
* Cleaned up changes of format somewhat in sunstartwrite on 03/31/98
*
*/
/*
* Copyright 1997 Chris Bagwell And Sundry Contributors
* This source code is freely redistributable and may be used for
* any purpose. This copyright notice must be maintained.
* Rick Richardson, Lance Norskog And Sundry Contributors are not
* responsible for the consequences of using this software.
*/
#include "st_i.h"
#ifdef HAVE_SUN_AUDIO
#include <sys/ioctl.h>
#include <sys/types.h>
#ifdef HAVE_SUN_AUDIOIO_H
#include <sun/audioio.h>
#else
#ifdef HAVE_SYS_AUDIOIO_H
#include <sys/audioio.h>
#endif
#endif
#include <errno.h>
#if !defined(__NetBSD__) && !defined(__OpenBSD__)
#include <stropts.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
/*
* Do anything required before you start reading samples.
* Read file header.
* Find out sampling rate,
* size and encoding of samples,
* mono/stereo/quad.
*/
static int st_sunstartread(ft_t ft)
{
st_fileinfo_t *file = (st_fileinfo_t *)ft->priv;
st_size_t samplesize, encoding;
audio_info_t audio_if;
#ifdef __SVR4
audio_device_t audio_dev;
#endif
char simple_hw=0;
/* Hard-code for now. */
file->count = 0;
file->pos = 0;
file->eof = 0;
file->size = 1024;
file->buf = xmalloc (file->size);
if (ft->signal.rate == 0.0) ft->signal.rate = 8000;
if (ft->signal.size == -1) ft->signal.size = ST_SIZE_BYTE;
if (ft->signal.encoding == ST_ENCODING_UNKNOWN) ft->signal.encoding = ST_ENCODING_ULAW;
#ifdef __SVR4
/* Read in old values, change to what we need and then send back */
if (ioctl(fileno(ft->fp), AUDIO_GETDEV, &audio_dev) < 0) {
st_fail_errno(ft,errno,"Unable to get device information.");
return(ST_EOF);
}
st_report("Hardware detected: %s",audio_dev.name);
if (strcmp("SUNW,am79c30",audio_dev.name) == 0)
{
simple_hw = 1;
}
#endif
/* If simple hardware detected in force data to ulaw. */
if (simple_hw)
{
if (ft->signal.size == ST_SIZE_BYTE)
{
if (ft->signal.encoding != ST_ENCODING_ULAW &&
ft->signal.encoding != ST_ENCODING_ALAW)
{
st_report("Warning: Detected simple hardware. Forcing output to ULAW");
ft->signal.encoding = ST_ENCODING_ULAW;
}
}
else if (ft->signal.size == ST_SIZE_16BIT)
{
st_report("Warning: Detected simple hardware. Forcing output to ULAW");
ft->signal.size = ST_SIZE_BYTE;
ft->signal.encoding = ST_ENCODING_ULAW;
}
}
if (ft->signal.size == ST_SIZE_BYTE) {
samplesize = 8;
if (ft->signal.encoding != ST_ENCODING_ULAW &&
ft->signal.encoding != ST_ENCODING_ALAW &&
ft->signal.encoding != ST_ENCODING_SIGN2) {
st_fail_errno(ft,ST_EFMT,"Sun audio driver only supports ULAW, ALAW, and signed linear for bytes.");
return (ST_EOF);
}
if ((ft->signal.encoding == ST_ENCODING_ULAW ||
ft->signal.encoding == ST_ENCODING_ALAW) &&
ft->signal.channels == 2)
{
st_report("Warning: only support mono for ULAW and ALAW data. Forcing to mono.");
ft->signal.channels = 1;
}
}
else if (ft->signal.size == ST_SIZE_16BIT) {
samplesize = 16;
if (ft->signal.encoding != ST_ENCODING_SIGN2) {
st_fail_errno(ft,ST_EFMT,"Sun audio driver only supports signed linear for words.");
return(ST_EOF);
}
}
else {
st_fail_errno(ft,ST_EFMT,"Sun audio driver only supports bytes and words");
return(ST_EOF);
}
if (ft->signal.channels == 0) ft->signal.channels = 1;
else if (ft->signal.channels > 1) {
st_report("Warning: some Sun audio devices can not play stereo");
st_report("at all or sometimes only with signed words. If the");
st_report("sound seems sluggish then this is probably the case.");
st_report("Try forcing output to signed words or use the avg");
st_report("filter to reduce the number of channels.");
ft->signal.channels = 2;
}
/* Read in old values, change to what we need and then send back */
if (ioctl(fileno(ft->fp), AUDIO_GETINFO, &audio_if) < 0) {
st_fail_errno(ft,errno,"Unable to initialize /dev/audio");
return(ST_EOF);
}
audio_if.record.precision = samplesize;
audio_if.record.channels = ft->signal.channels;
audio_if.record.sample_rate = ft->signal.rate;
if (ft->signal.encoding == ST_ENCODING_ULAW)
encoding = AUDIO_ENCODING_ULAW;
else if (ft->signal.encoding == ST_ENCODING_ALAW)
encoding = AUDIO_ENCODING_ALAW;
else
encoding = AUDIO_ENCODING_LINEAR;
audio_if.record.encoding = encoding;
ioctl(fileno(ft->fp), AUDIO_SETINFO, &audio_if);
if (audio_if.record.precision != samplesize) {
st_fail_errno(ft,errno,"Unable to initialize sample size for /dev/audio");
return(ST_EOF);
}
if (audio_if.record.channels != ft->signal.channels) {
st_fail_errno(ft,errno,"Unable to initialize number of channels for /dev/audio");
return(ST_EOF);
}
if (audio_if.record.sample_rate != ft->signal.rate) {
st_fail_errno(ft,errno,"Unable to initialize rate for /dev/audio");
return(ST_EOF);
}
if (audio_if.record.encoding != encoding) {
st_fail_errno(ft,errno,"Unable to initialize encoding for /dev/audio");
return(ST_EOF);
}
/* Flush any data in the buffers - its probably in the wrong format */
#if defined(__NetBSD__) || defined(__OpenBSD__)
ioctl(fileno(ft->fp), AUDIO_FLUSH);
#else
ioctl(fileno(ft->fp), I_FLUSH, FLUSHR);
#endif
/* Change to non-buffered I/O*/
setvbuf(ft->fp, NULL, _IONBF, sizeof(char) * file->size);
return (ST_SUCCESS);
}
static int st_sunstartwrite(ft_t ft)
{
st_fileinfo_t *file = (st_fileinfo_t *)ft->priv;
st_size_t samplesize, encoding;
audio_info_t audio_if;
#ifdef __SVR4
audio_device_t audio_dev;
#endif
char simple_hw=0;
/* Hard-code for now. */
file->count = 0;
file->pos = 0;
file->eof = 0;
file->size = 1024;
file->buf = xmalloc (file->size);
#ifdef __SVR4
/* Read in old values, change to what we need and then send back */
if (ioctl(fileno(ft->fp), AUDIO_GETDEV, &audio_dev) < 0) {
st_fail_errno(ft,errno,"Unable to get device information.");
return(ST_EOF);
}
st_report("Hardware detected: %s",audio_dev.name);
if (strcmp("SUNW,am79c30",audio_dev.name) == 0)
{
simple_hw = 1;
}
#endif
if (simple_hw)
{
if (ft->signal.size == ST_SIZE_BYTE)
{
if (ft->signal.encoding != ST_ENCODING_ULAW &&
ft->signal.encoding != ST_ENCODING_ALAW)
{
st_report("Warning: Detected simple hardware. Forcing output to ULAW");
ft->signal.encoding = ST_ENCODING_ULAW;
}
}
else if (ft->signal.size == ST_SIZE_16BIT)
{
st_report("Warning: Detected simple hardware. Forcing output to ULAW");
ft->signal.size = ST_SIZE_BYTE;
ft->signal.encoding = ST_ENCODING_ULAW;
}
}
if (ft->signal.rate == 0.0) ft->signal.rate = 8000;
if (ft->signal.size == -1) ft->signal.size = ST_SIZE_BYTE;
if (ft->signal.encoding == ST_ENCODING_UNKNOWN)
ft->signal.encoding = ST_ENCODING_ULAW;
if (ft->signal.size == ST_SIZE_BYTE)
{
samplesize = 8;
if (ft->signal.encoding != ST_ENCODING_ULAW &&
ft->signal.encoding != ST_ENCODING_ALAW &&
ft->signal.encoding != ST_ENCODING_SIGN2) {
st_report("Sun Audio driver only supports ULAW, ALAW, and Signed Linear for bytes.");
st_report("Forcing to ULAW");
ft->signal.encoding = ST_ENCODING_ULAW;
}
if ((ft->signal.encoding == ST_ENCODING_ULAW ||
ft->signal.encoding == ST_ENCODING_ALAW) &&
ft->signal.channels == 2)
{
st_report("Warning: only support mono for ULAW and ALAW data. Forcing to mono.");
ft->signal.channels = 1;
}
}
else if (ft->signal.size == ST_SIZE_16BIT) {
samplesize = 16;
if (ft->signal.encoding != ST_ENCODING_SIGN2) {
st_report("Sun Audio driver only supports Signed Linear for words.");
st_report("Forcing to Signed Linear");
ft->signal.encoding = ST_ENCODING_SIGN2;
}
}
else {
st_report("Sun Audio driver only supports bytes and words");
ft->signal.size = ST_SIZE_16BIT;
samplesize = 16;
}
if (ft->signal.channels == 0) ft->signal.channels = 1;
else if (ft->signal.channels > 1) ft->signal.channels = 2;
/* Read in old values, change to what we need and then send back */
if (ioctl(fileno(ft->fp), AUDIO_GETINFO, &audio_if) < 0) {
st_fail_errno(ft,errno,"Unable to initialize /dev/audio");
return(ST_EOF);
}
audio_if.play.precision = samplesize;
audio_if.play.channels = ft->signal.channels;
audio_if.play.sample_rate = ft->signal.rate;
if (ft->signal.encoding == ST_ENCODING_ULAW)
encoding = AUDIO_ENCODING_ULAW;
else if (ft->signal.encoding == ST_ENCODING_ALAW)
encoding = AUDIO_ENCODING_ALAW;
else
encoding = AUDIO_ENCODING_LINEAR;
audio_if.play.encoding = encoding;
ioctl(fileno(ft->fp), AUDIO_SETINFO, &audio_if);
if (audio_if.play.precision != samplesize) {
st_fail_errno(ft,errno,"Unable to initialize sample size for /dev/audio");
return(ST_EOF);
}
if (audio_if.play.channels != ft->signal.channels) {
st_fail_errno(ft,errno,"Unable to initialize number of channels for /dev/audio");
return(ST_EOF);
}
if (audio_if.play.sample_rate != ft->signal.rate) {
st_fail_errno(ft,errno,"Unable to initialize rate for /dev/audio");
return(ST_EOF);
}
if (audio_if.play.encoding != encoding) {
st_fail_errno(ft,errno,"Unable to initialize encoding for /dev/audio");
return(ST_EOF);
}
/* Change to non-buffered I/O */
setvbuf(ft->fp, NULL, _IONBF, sizeof(char) * file->size);
return (ST_SUCCESS);
}
/* Sun /dev/audio player */
static const char *sunnames[] = {
"sunau",
NULL
};
static st_format_t st_sun_format = {
sunnames,
NULL,
ST_FILE_DEVICE,
st_sunstartread,
st_rawread,
st_rawstopread,
st_sunstartwrite,
st_rawwrite,
st_rawstopwrite,
st_format_nothing_seek
};
const st_format_t *st_sun_format_fn(void)
{
return &st_sun_format;
}
#endif