home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
AmigActive 6
/
AACD06.ISO
/
AACD
/
Emulation
/
BasiliskII
/
src
/
Unix
/
Solaris
/
audio_solaris.cpp
next >
Wrap
C/C++ Source or Header
|
1999-11-03
|
8KB
|
324 lines
/*
* audio_solaris.cpp - Audio support, Solaris implementation
*
* Adapted from Frodo's Solaris sound routines by Marc Chabanas
*
* Basilisk II (C) 1997-1999 Christian Bauer
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "sysdeps.h"
#include <sys/ioctl.h>
#include <sys/audioio.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <semaphore.h>
#include "cpu_emulation.h"
#include "main.h"
#include "prefs.h"
#include "user_strings.h"
#include "audio.h"
#include "audio_defs.h"
#define DEBUG 0
#include "debug.h"
// Supported sample rates, sizes and channels
int audio_num_sample_rates = 1;
uint32 audio_sample_rates[] = {44100 << 16};
int audio_num_sample_sizes = 1;
uint16 audio_sample_sizes[] = {16};
int audio_num_channel_counts = 1;
uint16 audio_channel_counts[] = {2};
// Global variables
static int fd = -1; // fd of /dev/audio
static sem_t audio_irq_done_sem; // Signal from interrupt to streaming thread: data block read
static pthread_t stream_thread; // Audio streaming thread
static pthread_attr_t stream_thread_attr; // Streaming thread attributes
static bool stream_thread_active = false;
static int sound_buffer_size; // Size of sound buffer in bytes
// Prototypes
static void *stream_func(void *arg);
/*
* Initialization
*/
void AudioInit(void)
{
char str[256];
// Init audio status and feature flags
AudioStatus.sample_rate = audio_sample_rates[0];
AudioStatus.sample_size = audio_sample_sizes[0];
AudioStatus.channels = audio_channel_counts[0];
AudioStatus.mixer = 0;
AudioStatus.num_sources = 0;
audio_component_flags = cmpWantsRegisterMessage | kStereoOut | k16BitOut;
// Sound disabled in prefs? Then do nothing
if (PrefsFindBool("nosound"))
return;
// Init semaphore
if (sem_init(&audio_irq_done_sem, 0, 0) < 0)
return;
// Open /dev/audio
fd = open("/dev/audio", O_WRONLY | O_NDELAY);
if (fd < 0) {
sprintf(str, GetString(STR_NO_AUDIO_DEV_WARN), "/dev/audio", strerror(errno));
WarningAlert(str);
sem_destroy(&audio_irq_done_sem);
return;
}
// Set audio parameters
struct audio_info info;
AUDIO_INITINFO(&info);
info.play.sample_rate = AudioStatus.sample_rate >> 16;
info.play.channels = AudioStatus.channels;
info.play.precision = AudioStatus.sample_size;
info.play.encoding = AUDIO_ENCODING_LINEAR;
info.play.port = AUDIO_SPEAKER;
if (ioctl(fd, AUDIO_SETINFO, &info)) {
WarningAlert(GetString(STR_AUDIO_FORMAT_WARN));
close(fd);
fd = -1;
sem_destroy(&audio_irq_done_sem);
return;
}
// 2048 frames per buffer
audio_frames_per_block = 2048;
sound_buffer_size = (AudioStatus.sample_size>>3) * AudioStatus.channels * audio_frames_per_block;
// Start audio thread
pthread_attr_init(&stream_thread_attr);
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
pthread_attr_setinheritsched(&stream_thread_attr, PTHREAD_EXPLICIT_SCHED);
pthread_attr_setschedpolicy(&stream_thread_attr, SCHED_FIFO);
struct sched_param fifo_param;
fifo_param.sched_priority = (sched_get_priority_min(SCHED_FIFO) + sched_get_priority_max(SCHED_FIFO)) / 2;
pthread_attr_setschedparam(&stream_thread_attr, &fifo_param);
#endif
stream_thread_active = (pthread_create(&stream_thread, &stream_thread_attr, stream_func, NULL) == 0);
// Everything OK
audio_open = true;
}
/*
* Deinitialization
*/
void AudioExit(void)
{
// Stop audio thread
if (stream_thread_active) {
pthread_cancel(stream_thread);
pthread_join(stream_thread, NULL);
sem_destroy(&audio_irq_done_sem);
stream_thread_active = false;
}
// Close /dev/audio
if (fd > 0) {
ioctl(fd, AUDIO_DRAIN);
close(fd);
}
}
/*
* First source added, start audio stream
*/
void audio_enter_stream()
{
}
/*
* Last source removed, stop audio stream
*/
void audio_exit_stream()
{
}
/*
* Streaming function
*/
static uint32 apple_stream_info; // Mac address of SoundComponentData struct describing next buffer
static void *stream_func(void *arg)
{
int16 *silent_buffer = new int16[sound_buffer_size / 2];
int16 *last_buffer = new int16[sound_buffer_size / 2];
memset(silent_buffer, 0, sound_buffer_size);
uint_t sent = 0, delta;
struct audio_info status;
for (;;) {
if (AudioStatus.num_sources) {
// Trigger audio interrupt to get new buffer
D(bug("stream: triggering irq\n"));
SetInterruptFlag(INTFLAG_AUDIO);
TriggerInterrupt();
D(bug("stream: waiting for ack\n"));
sem_wait(&audio_irq_done_sem);
D(bug("stream: ack received\n"));
// Get size of audio data
uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
if (apple_stream_info) {
int work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels;
D(bug("stream: work_size %d\n", work_size));
if (work_size > sound_buffer_size)
work_size = sound_buffer_size;
if (work_size == 0)
goto silence;
// Send data to audio port
if (work_size == sound_buffer_size)
write(fd, Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)), sound_buffer_size);
else {
// Last buffer
Mac2Host_memcpy(last_buffer, ReadMacInt32(apple_stream_info + scd_buffer), work_size);
memset((uint8 *)last_buffer + work_size, 0, sound_buffer_size - work_size);
write(fd, last_buffer, sound_buffer_size);
}
D(bug("stream: data written\n"));
} else
goto silence;
} else {
// Audio not active, play silence
silence: write(fd, silent_buffer, sound_buffer_size);
}
// We allow a maximum of three buffers to be sent
sent += audio_frames_per_block;
ioctl(fd, AUDIO_GETINFO, &status);
while ((delta = sent - status.play.samples) > (audio_frames_per_block * 3)) {
unsigned int sl = 1000000 * (delta - audio_frames_per_block * 3) / (AudioStatus.sample_rate >> 16);
usleep(sl);
ioctl(fd, AUDIO_GETINFO, &status);
}
}
return NULL;
}
/*
* MacOS audio interrupt, read next data block
*/
void AudioInterrupt(void)
{
D(bug("AudioInterrupt\n"));
// Get data from apple mixer
if (AudioStatus.mixer) {
M68kRegisters r;
r.a[0] = audio_data + adatStreamInfo;
r.a[1] = AudioStatus.mixer;
Execute68k(audio_data + adatGetSourceData, &r);
D(bug(" GetSourceData() returns %08lx\n", r.d[0]));
} else
WriteMacInt32(audio_data + adatStreamInfo, 0);
// Signal stream function
sem_post(&audio_irq_done_sem);
D(bug("AudioInterrupt done\n"));
}
/*
* Set sampling parameters
* "index" is an index into the audio_sample_rates[] etc. arrays
* It is guaranteed that AudioStatus.num_sources == 0
*/
void audio_set_sample_rate(int index)
{
}
void audio_set_sample_size(int index)
{
}
void audio_set_channels(int index)
{
}
/*
* Get/set volume controls (volume values received/returned have the left channel
* volume in the upper 16 bits and the right channel volume in the lower 16 bits;
* both volumes are 8.8 fixed point values with 0x0100 meaning "maximum volume"))
*/
bool audio_get_main_mute(void)
{
return false;
}
uint32 audio_get_main_volume(void)
{
return 0x01000100;
}
bool audio_get_speaker_mute(void)
{
return false;
}
uint32 audio_get_speaker_volume(void)
{
return 0x01000100;
}
void audio_set_main_mute(bool mute)
{
}
void audio_set_main_volume(uint32 vol)
{
}
void audio_set_speaker_mute(bool mute)
{
}
void audio_set_speaker_volume(uint32 vol)
{
}