ref: 876f21808513d24b82838b0558c71dce9a414f0e
dir: /src/sunaudio.c/
#if defined(SUNAUDIO_PLAYER)
/*
* 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.
*/
/* 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
*
*/
#include <sys/ioctl.h>
#ifdef __SVR4
#include <sys/audioio.h>
#else
#include <sun/audioio.h>
#endif
#include <malloc.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include "st.h"
/*
* Do anything required before you start reading samples.
* Read file header.
* Find out sampling rate,
* size and encoding of samples,
* mono/stereo/quad.
*/
int st_sunstartread(ft)
ft_t ft;
{
int samplesize, encoding;
audio_info_t audio_if;
#ifdef __SVR4
audio_device_t audio_dev;
#endif
char simple_hw=0;
/* Hard code for now. */
ft->file.count = 0;
ft->file.pos = 0;
ft->file.eof = 0;
ft->file.size = 1024;
if ((ft->file.buf = malloc (ft->file.size)) == NULL) {
st_fail("unable to allocate input buffer of size %d", ft->file.size);
return ST_EOF;
}
if (ft->info.rate == 0.0) ft->info.rate = 8000;
if (ft->info.size == -1) ft->info.size = ST_SIZE_BYTE;
if (ft->info.encoding == -1) ft->info.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("Unable to get device information.");
return(ST_EOF);
}
st_report("Hardware detected: %s\n",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->info.size == ST_SIZE_BYTE)
{
if (ft->info.encoding != ST_ENCODING_ULAW &&
ft->info.encoding != ST_ENCODING_ALAW)
{
st_report("Warning: Detected simple hardware. Forcing output to ULAW");
ft->info.encoding = ST_ENCODING_ULAW;
}
}
else if (ft->info.size == ST_SIZE_WORD)
{
st_report("Warning: Detected simple hardware. Forcing output to ULAW");
ft->info.size = ST_SIZE_BYTE;
ft->info.encoding = ST_ENCODING_ULAW;
}
}
if (ft->info.size == ST_SIZE_BYTE) {
samplesize = 8;
if (ft->info.encoding != ST_ENCODING_ULAW &&
ft->info.encoding != ST_ENCODING_ALAW &&
ft->info.encoding != ST_ENCODING_SIGN2) {
st_fail("Sun Audio driver only supports ULAW, ALAW, and Signed Linear for bytes.");
}
if ((ft->info.encoding == ST_ENCODING_ULAW ||
ft->info.encoding == ST_ENCODING_ALAW) && ft->info.channels == 2)
{
st_report("Warning: only support mono for ULAW and ALAW data. Forcing to mono");
ft->info.channels = 2;
}
}
else if (ft->info.size == ST_SIZE_WORD) {
samplesize = 16;
if (ft->info.encoding != ST_ENCODING_SIGN2) {
st_fail("Sun Audio driver only supports Signed Linear for words.");
return(ST_EOF);
}
}
else {
st_fail("Sun Audio driver only supports bytes and words");
return(ST_EOF);
}
if (ft->info.channels == -1) ft->info.channels = 1;
else if (ft->info.channels > 1) {
st_report("Warning: some sun audio devices can not play stereo");
st_report("at all or sometime 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->info.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("Unable to initialize /dev/audio");
return(ST_EOF);
}
audio_if.record.precision = samplesize;
audio_if.record.channels = ft->info.channels;
audio_if.record.sample_rate = ft->info.rate;
if (ft->info.encoding == ST_ENCODING_ULAW)
encoding = AUDIO_ENCODING_ULAW;
else if (ft->info.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("Unable to initialize sample size for /dev/audio");
return(ST_EOF);
}
if (audio_if.record.channels != ft->info.channels) {
st_fail("Unable to initialize number of channels for /dev/audio");
return(ST_EOF);
}
if (audio_if.record.sample_rate != ft->info.rate) {
st_fail("Unable to initialize rate for /dev/audio");
return(ST_EOF);
}
if (audio_if.record.encoding != encoding) {
st_fail("Unable to initialize encoding for /dev/audio");
return(ST_EOF);
}
/* Change to non-buffered I/O*/
setvbuf(ft->fp, NULL, _IONBF, sizeof(char) * ft->file.size);
sigintreg(ft); /* Prepare to catch SIGINT */
return (ST_SUCCESS);
}
int st_sunstartwrite(ft)
ft_t ft;
{
int samplesize, encoding;
audio_info_t audio_if;
#ifdef __SVR4
audio_device_t audio_dev;
#endif
char simple_hw=0;
/* Hard code for now. */
ft->file.count = 0;
ft->file.pos = 0;
ft->file.eof = 0;
ft->file.size = 1024;
if ((ft->file.buf = malloc (ft->file.size)) == NULL) {
st_fail("unable to allocate output buffer of size %d", ft->file.size);
return(ST_EOF);
}
#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("Unable to get device information.");
return(ST_EOF);
}
st_report("Hardware detected: %s\n",audio_dev.name);
if (strcmp("SUNW,am79c30",audio_dev.name) == 0)
{
simple_hw = 1;
}
#endif
if (simple_hw)
{
if (ft->info.size == ST_SIZE_BYTE)
{
if (ft->info.encoding != ST_ENCODING_ULAW &&
ft->info.encoding != ST_ENCODING_ALAW)
{
st_report("Warning: Detected simple hardware. Forcing output to ULAW");
ft->info.encoding = ST_ENCODING_ULAW;
}
}
else if (ft->info.size == ST_SIZE_WORD)
{
st_report("Warning: Detected simple hardware. Forcing output to ULAW");
ft->info.size = ST_SIZE_BYTE;
ft->info.encoding = ST_ENCODING_ULAW;
}
}
if (ft->info.rate == 0.0) ft->info.rate = 8000;
if (ft->info.size == -1) ft->info.size = ST_SIZE_BYTE;
if (ft->info.encoding == -1) ft->info.encoding = ST_ENCODING_ULAW;
if (ft->info.size == ST_SIZE_BYTE) {
samplesize = 8;
if (ft->info.encoding != ST_ENCODING_ULAW &&
ft->info.encoding != ST_ENCODING_ALAW &&
ft->info.encoding != ST_ENCODING_SIGN2) {
st_report("Sun Audio driver only supports ULAW, ALAW, and Signed Linear for bytes.");
st_report("Forcing to ULAW");
ft->info.encoding = ST_ENCODING_ULAW;
}
if ((ft->info.encoding == ST_ENCODING_ULAW ||
ft->info.encoding == ST_ENCODING_ALAW) && ft->info.channels == 2)
{
st_report("Warning: only support mono for ULAW and ALAW data. Forcing to mono");
ft->info.channels = 2;
}
}
else if (ft->info.size == ST_SIZE_WORD) {
samplesize = 16;
if (ft->info.encoding != ST_ENCODING_SIGN2) {
st_report("Sun Audio driver only supports Signed Linear for words.");
st_report("Forcing to Signed Linear");
ft->info.encoding = ST_ENCODING_SIGN2;
}
}
else {
st_report("Sun Audio driver only supports bytes and words");
ft->info.size = ST_SIZE_WORD;
samplesize = 16;
}
if (ft->info.channels == -1) ft->info.channels = 1;
else if (ft->info.channels > 1) ft->info.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("Unable to initialize /dev/audio");
return(ST_EOF);
}
audio_if.play.precision = samplesize;
audio_if.play.channels = ft->info.channels;
audio_if.play.sample_rate = ft->info.rate;
if (ft->info.encoding == ST_ENCODING_ULAW)
encoding = AUDIO_ENCODING_ULAW;
else if (ft->info.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("Unable to initialize sample size for /dev/audio");
return(ST_EOF);
}
if (audio_if.play.channels != ft->info.channels) {
st_fail("Unable to initialize number of channels for /dev/audio");
return(ST_EOF);
}
if (audio_if.play.sample_rate != ft->info.rate) {
st_fail("Unable to initialize rate for /dev/audio");
return(ST_EOF);
}
if (audio_if.play.encoding != encoding) {
st_fail("Unable to initialize encoding for /dev/audio");
return(ST_EOF);
}
/* Change to non-buffered I/O */
setvbuf(ft->fp, NULL, _IONBF, sizeof(char) * ft->file.size);
return (ST_SUCCESS);
}
#endif