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// sun_dac.C
/******************************************************************************
*
* MiXViews - an X window system based sound & data editor/processor
*
* Copyright (c) 1993, 1994 Regents of the University of California
*
* Author: Douglas Scott
* Date: December 13, 1994
*
* Permission to use, copy and modify this software and its documentation
* for research and/or educational purposes and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation. The author reserves the right to distribute this
* software and its documentation. The University of California and the author
* make no representations about the suitability of this software for any
* purpose, and in no event shall University of California be liable for any
* damage, loss of data, or profits resulting from its use.
* It is provided "as is" without express or implied warranty.
*
******************************************************************************/
#ifdef __GNUG__
#pragma implementation
#endif
#include <sys/stat.h>
#include <fcntl.h>
#include <stropts.h>
#include "application.h"
#include "typeconvert.h"
#include "sun_audio.h"
#include "sun_dac.h"
#include "statusaction.h"
#ifndef AUDIO_LINE_IN
#define AUDIO_LINE_IN (0x02)
#endif
#ifndef AUDIO_LINE_OUT
#define AUDIO_LINE_OUT (0x04)
#endif
#define PRINT(x, y) fprintf(stderr, x, y)
extern "C" int poll(struct pollfd*, unsigned long, int);
int SunConverter::sparc_version = 1;
struct pollfd SunConverter::pollStruct;
SunConverter::SunConverter() : ConverterDevice("/dev/audio") {
BUG("SunConverter::SunConverter()");
initialize();
failIf(!confirmDeviceType());
}
SunConverter::~SunConverter() {
BUG("SunConverter::~SunConverter()");
stop();
}
boolean
SunConverter::isPlayableFormat(DataType type) {
if(isSparc10())
return (type == ShortData || type == MuLawData);
else
return (type == MuLawData);
}
DataType
SunConverter::bestPlayableType() {
return isSparc10() ? ShortData : MuLawData;
}
unsigned
SunConverter::sampleEncoding() {
unsigned encoding;
DataType type = dataType();
switch (type) {
case MuLawData:
encoding = AUDIO_ENCODING_ULAW; break;
// case ALawData:
// encoding = AUDIO_ENCODING_ALAW; break;
case SignedCharData:
case ShortData:
encoding = AUDIO_ENCODING_LINEAR; break;
case FloatData:
encoding = AUDIO_ENCODING_FLOAT; break;
default:
encoding = 0; break;
};
return encoding;
}
int
SunConverter::pause() {
BUG("SunConverter::pause()");
int ret = true;
if(!paused()) {
ret = willPlay() ? audio_pause_play(fdesc())
: willRecord() ? audio_pause_record(fdesc()) : -1;
ret = (ret == AUDIO_SUCCESS && Super::pause());
if(!ret)
error("Can't pause audio device.");
}
return ret;
}
int
SunConverter::resume() {
BUG("SunConverter::resume()");
int ret = true;
if(paused()) {
ret = willPlay() ? audio_resume_play(fdesc())
: willRecord() ? audio_resume_record(fdesc()) : -1;
ret = (ret == AUDIO_SUCCESS && Super::resume());
if(!ret) error("Can't unpause audio device.");
}
return ret;
}
int
SunConverter::stop() {
BUG("SunConverter::stop()");
int status = true;
if(running()) {
if(audio_flush(fdesc()) != AUDIO_SUCCESS) {
error("Can't flush audio device.");
status = false;
}
status = Super::stop() && status;
}
return status;
}
int
SunConverter::doConfigure() {
BUG("SunConverter::doConfigure()");
Audio_hdr Dev_hdr; // audio header for device
Audio_hdr Sound_hdr; // audio header for sound
// fill in values from sound to be played/recorded
Sound_hdr.sample_rate = sampleRate();
Sound_hdr.samples_per_unit = 1;
Sound_hdr.bytes_per_unit = type_to_sampsize(dataType());
Sound_hdr.channels = channels();
Sound_hdr.encoding = sampleEncoding();
Sound_hdr.data_size = dataSize();
boolean status = true;
// device is opened with correct mode here, not closed again until stop()
status = reOpen();
int afd = fdesc();
// wait for old output to drain, if any
if(willPlay() && audio_drain(afd, 0) != AUDIO_SUCCESS)
return false;
status = pause() && getConfiguration(&Dev_hdr);
if(status) {
// reconfigure device if device settings do not match sound
if(audio_cmp_hdr(&Dev_hdr, &Sound_hdr) != 0)
status = reconfigure(&Dev_hdr, &Sound_hdr);
}
if(status && willRecord()) {
// flush input queue
if(audio_flush_record(afd) != AUDIO_SUCCESS) {
error("Converter::configure: Unable to flush input queue.");
status = false;
} // Set the device up for non-blocking reads
else if(fcntl(afd, F_SETFL, fcntl(afd, F_GETFL, 0) | O_NDELAY) < 0) {
error("Converter::configure: fcntl() failed.");
status = false;
}
}
pollStruct.fd = afd; // initialize polling struct
pollStruct.events = willRecord() ? POLLIN : POLLOUT;
#if 0
if(status && willRecord()) {
double gain = 0;
audio_get_record_gain(fdesc(), &gain);
PRINT("At end of configuration: device rec level: %f\n\n", gain);
}
#endif
return status && resume(); // device unpaused at last instant
}
boolean
SunConverter::getConfiguration(Audio_hdr *devhdr) {
BUG("SunConverter::getConfiguration()");
// Get the device output encoding configuration
boolean status = true;
if(willPlay()) {
if(audio_get_play_config(fdesc(), devhdr) != AUDIO_SUCCESS) {
error("The device is not an audio device.");
status = false;
}
}
else if(willRecord()) {
if(audio_get_record_config(fdesc(), devhdr) != AUDIO_SUCCESS) {
error("The device is not an audio device.");
status = false;
}
}
return status;
}
boolean
SunConverter::reconfigure(Audio_hdr *devhdr, Audio_hdr *soundhdr) {
BUG("SunConverter::reconfigure()");
char msg[AUDIO_MAX_ENCODE_INFO+64];
char encoding[AUDIO_MAX_ENCODE_INFO];
char* action = willRecord() ? "record" : "play";
*devhdr = *soundhdr;
int retval = willPlay() ?
audio_set_play_config(fdesc(), devhdr)
: audio_set_record_config(fdesc(), devhdr);
static const double SampRateThreshold = 0.05;
switch (retval) {
case AUDIO_SUCCESS:
break;
case AUDIO_ERR_NOEFFECT:
// Couldn't change the device.
// Check to see if we're nearly compatible.
// audio_cmp_hdr() returns >0 if only sample rate difference.
if(audio_cmp_hdr(devhdr, soundhdr) == 1) {
double ratio = double(abs(
int(devhdr->sample_rate - soundhdr->sample_rate))) /
double(soundhdr->sample_rate);
if (ratio <= SampRateThreshold) {
sprintf(msg, "Samp rate was %d, %sing at %d",
soundhdr->sample_rate, action, devhdr->sample_rate);
Application::inform(msg, true);
}
else {
sprintf(msg, "Cannot %s at sample rate %d.", action,
soundhdr->sample_rate);
Application::alert(msg);
return false;
}
}
else {
(void) audio_enc_to_str(soundhdr, encoding);
sprintf(msg, "Cannot %s sound in format:", action);
Application::alert(msg, encoding);
return false;
}
break; /*NOTREACHED*/
case AUDIO_ERR_ENCODING:
(void) audio_enc_to_str(soundhdr, encoding);
sprintf(msg, "Cannot %s sound in format:", action);
Application::alert(msg, encoding);
return false;
break; /*NOTREACHED*/
case AUDIO_UNIXERROR:
if(isSparc10()) { // Sparc 10 generates this instead of previous
(void) audio_enc_to_str(soundhdr, encoding);
sprintf(msg, "Cannot %s sound in format:", action);
error(msg, encoding);
}
else
error("audio configuration failed");
return false;
break; /*NOTREACHED*/
default:
(void) audio_enc_to_str(soundhdr, encoding);
Application::alert("audio configuration failed for format:", encoding);
return false;
break; /*NOTREACHED*/
}
return true;
}
// Write EOF to device, then loop to check for play completion
int
SunConverter::waitForStop(StatusAction* askedToStop) {
BUG("SunConverter::waitForStop()");
if(audio_play_eof(fdesc()) != AUDIO_SUCCESS)
return error("Unable to write EOF to device");
unsigned EOF_count = 0;
do {
usleep(50000); // sleep .05 secs
if((*askedToStop)())
break;
if(audio_get_play_eof(fdesc(), &EOF_count) != AUDIO_SUCCESS)
return error("waitForStop: audio_get_play_eof failed");
} while (EOF_count == 0);
return true;
}
SunConverter::InputPort
SunConverter::currentInputPort() {
unsigned audio_port = 0;
if(audio_get_record_port(fdesc(), &audio_port) != AUDIO_SUCCESS)
error("Unable to retrieve input port setting.");
return (audio_port & AUDIO_MICROPHONE) ? Mike : Line;
}
boolean
SunConverter::setInputPort(InputPort port) {
unsigned audio_port = (port == Mike) ? AUDIO_MICROPHONE : AUDIO_LINE_IN;
if(audio_set_record_port(fdesc(), &audio_port) != AUDIO_SUCCESS)
return error("Can't set audio input port!");
return true;
}
SunConverter::OutputPort
SunConverter::currentOutputPort() {
unsigned audio_port = 0;
if(audio_get_play_port(fdesc(), &audio_port) != AUDIO_SUCCESS)
error("Unable to retrieve output port setting.");
return (audio_port & AUDIO_SPEAKER) ? Speaker : Headphone;
}
boolean
SunConverter::setOutputPort(OutputPort port) {
unsigned audio_port = (port == Speaker) ? AUDIO_SPEAKER : AUDIO_HEADPHONE;
// enable line output at all times when hardware permits
if(isSparc20()) audio_port |= AUDIO_LINE_OUT;
if(audio_set_play_port(fdesc(), &audio_port) != AUDIO_SUCCESS)
return error("Can't set audio output port!");
return true;
}
int
SunConverter::currentRecordLevel() const {
double gain = 0;
if(audio_get_record_gain(fdesc(), &gain) != AUDIO_SUCCESS)
error("Unable to retrieve record gain level.");
#ifdef debug
PRINT("Retrieved rec. level from device: %f\n\n", gain);
#endif
return int(gain * 100.0);
}
boolean
SunConverter::setRecordLevel(int volume) {
double gain = volume / 100.0;
#ifdef debug
PRINT("Setting device record level to %f\n", gain);
#endif
if(audio_set_record_gain(fdesc(), &gain) != AUDIO_SUCCESS)
return error("Unable to set converter record level.");
#ifdef debug
audio_get_record_gain(fdesc(), &gain);
PRINT("Retrieving just-set level for check: %f\n\n", gain);
#endif
return true;
}
int
SunConverter::currentPlayLevel() const {
double gain = 0;
if(audio_get_play_gain(fdesc(), &gain) != AUDIO_SUCCESS)
error("Unable to retrieve playback gain level.");
#ifdef debug
PRINT("Retrieved play level from device: %f\n\n", gain);
#endif
return round(gain * 100.0);
}
boolean
SunConverter::setPlayLevel(int volume) {
double gain = volume / 100.0;
#ifdef debug
PRINT("Setting device play level to %f\n", gain);
#endif
if(audio_set_play_gain(fdesc(), &gain) != AUDIO_SUCCESS)
return error("Unable to set converter play level.");
#ifdef debug
audio_get_play_gain(fdesc(), &gain);
PRINT("Retrieving just-set level for check: %f\n\n", gain);
#endif
return true;
}
int
SunConverter::confirmDeviceType() {
struct stat st;
if(stat(deviceName(), &st) < 0) {
error("Cannot stat converter device.");
return false;
}
if (!S_ISCHR(st.st_mode)) {
char msg[128];
sprintf(msg, "%s %s", deviceName(), "is not an audio device.");
Application::alert(msg);
return false;
}
return true;
}
#ifndef __GNUG__
extern "C" char* getenv(const char*);
#endif
void
SunConverter::initialize() {
BUG("SunConverter::initialize()");
// to avoid multiple binaries, we use environmental vars to distinguish
const char* enVar = getenv("MXV_SPARC_10");
sparc_version = 1; // default
if(enVar && (!strcmp(enVar, "YES") || !strcmp(enVar, "yes")))
sparc_version = 10;
enVar = getenv("MXV_SPARC_20");
if(enVar && (!strcmp(enVar, "YES") || !strcmp(enVar, "yes")))
sparc_version = 20;
}
void
SunConverter::waitForDevice() {
(void) poll(&pollStruct, 1L, -1);
}
// always write 0.1 seconds of sound per buffer
int
SunConverter::writeSize() {
return int(0.1 * sampleRate() * channels() * type_to_sampsize(dataType()));
}
// later this may be changed
int
SunConverter::readSize() {
return writeSize();
}
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