home *** CD-ROM | disk | FTP | other *** search
- /*
- * audio_solaris.cpp - Audio support, Solaris implementation
- *
- * Adapted from Frodo's Solaris sound routines by Marc Chabanas
- *
- * Basilisk II (C) 1997-2001 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)
- {
- }
-