mirror of
https://github.com/kanjitalk755/macemu.git
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321 lines
7.5 KiB
C++
321 lines
7.5 KiB
C++
/*
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* audio_solaris.cpp - Audio support, Solaris implementation
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*
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* Adapted from Frodo's Solaris sound routines by Marc Chabanas
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*
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* Basilisk II (C) 1997-2008 Christian Bauer
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "sysdeps.h"
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#include <sys/ioctl.h>
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#include <sys/audioio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <pthread.h>
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#include <semaphore.h>
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#include "cpu_emulation.h"
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#include "main.h"
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#include "prefs.h"
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#include "user_strings.h"
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#include "audio.h"
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#include "audio_defs.h"
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#define DEBUG 0
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#include "debug.h"
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// Global variables
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static int fd = -1; // fd of /dev/audio
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static sem_t audio_irq_done_sem; // Signal from interrupt to streaming thread: data block read
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static pthread_t stream_thread; // Audio streaming thread
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static pthread_attr_t stream_thread_attr; // Streaming thread attributes
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static bool stream_thread_active = false;
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static int sound_buffer_size; // Size of sound buffer in bytes
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// Prototypes
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static void *stream_func(void *arg);
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/*
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* Initialization
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*/
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// Set AudioStatus to reflect current audio stream format
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static void set_audio_status_format(void)
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{
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AudioStatus.sample_rate = audio_sample_rates[0];
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AudioStatus.sample_size = audio_sample_sizes[0];
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AudioStatus.channels = audio_channel_counts[0];
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}
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void AudioInit(void)
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{
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char str[256];
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// Init audio status and feature flags
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audio_sample_rates.push_back(44100 << 16);
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audio_sample_sizes.push_back(16);
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audio_channel_counts.push_back(2);
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set_audio_status_format();
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AudioStatus.mixer = 0;
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AudioStatus.num_sources = 0;
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audio_component_flags = cmpWantsRegisterMessage | kStereoOut | k16BitOut;
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// Sound disabled in prefs? Then do nothing
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if (PrefsFindBool("nosound"))
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return;
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// Init semaphore
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if (sem_init(&audio_irq_done_sem, 0, 0) < 0)
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return;
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// Open /dev/audio
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fd = open("/dev/audio", O_WRONLY | O_NDELAY);
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if (fd < 0) {
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sprintf(str, GetString(STR_NO_AUDIO_DEV_WARN), "/dev/audio", strerror(errno));
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WarningAlert(str);
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sem_destroy(&audio_irq_done_sem);
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return;
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}
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// Set audio parameters
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struct audio_info info;
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AUDIO_INITINFO(&info);
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info.play.sample_rate = AudioStatus.sample_rate >> 16;
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info.play.channels = AudioStatus.channels;
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info.play.precision = AudioStatus.sample_size;
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info.play.encoding = AUDIO_ENCODING_LINEAR;
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info.play.port = AUDIO_SPEAKER;
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if (ioctl(fd, AUDIO_SETINFO, &info)) {
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WarningAlert(GetString(STR_AUDIO_FORMAT_WARN));
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close(fd);
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fd = -1;
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sem_destroy(&audio_irq_done_sem);
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return;
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}
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// 2048 frames per buffer
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audio_frames_per_block = 2048;
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sound_buffer_size = (AudioStatus.sample_size>>3) * AudioStatus.channels * audio_frames_per_block;
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// Start audio thread
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Set_pthread_attr(&stream_thread_attr, 0);
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stream_thread_active = (pthread_create(&stream_thread, &stream_thread_attr, stream_func, NULL) == 0);
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// Everything OK
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audio_open = true;
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}
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/*
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* Deinitialization
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*/
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void AudioExit(void)
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{
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// Stop audio thread
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if (stream_thread_active) {
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pthread_cancel(stream_thread);
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pthread_join(stream_thread, NULL);
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sem_destroy(&audio_irq_done_sem);
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stream_thread_active = false;
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}
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// Close /dev/audio
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if (fd > 0) {
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ioctl(fd, AUDIO_DRAIN);
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close(fd);
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}
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}
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/*
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* First source added, start audio stream
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*/
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void audio_enter_stream()
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{
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}
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/*
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* Last source removed, stop audio stream
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*/
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void audio_exit_stream()
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{
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}
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/*
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* Streaming function
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*/
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static uint32 apple_stream_info; // Mac address of SoundComponentData struct describing next buffer
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static void *stream_func(void *arg)
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{
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int16 *silent_buffer = new int16[sound_buffer_size / 2];
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int16 *last_buffer = new int16[sound_buffer_size / 2];
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memset(silent_buffer, 0, sound_buffer_size);
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uint_t sent = 0, delta;
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struct audio_info status;
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for (;;) {
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if (AudioStatus.num_sources) {
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// Trigger audio interrupt to get new buffer
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D(bug("stream: triggering irq\n"));
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SetInterruptFlag(INTFLAG_AUDIO);
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TriggerInterrupt();
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D(bug("stream: waiting for ack\n"));
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sem_wait(&audio_irq_done_sem);
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D(bug("stream: ack received\n"));
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// Get size of audio data
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uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
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if (apple_stream_info) {
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int work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels;
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D(bug("stream: work_size %d\n", work_size));
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if (work_size > sound_buffer_size)
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work_size = sound_buffer_size;
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if (work_size == 0)
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goto silence;
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// Send data to audio port
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if (work_size == sound_buffer_size)
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write(fd, Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)), sound_buffer_size);
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else {
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// Last buffer
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Mac2Host_memcpy(last_buffer, ReadMacInt32(apple_stream_info + scd_buffer), work_size);
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memset((uint8 *)last_buffer + work_size, 0, sound_buffer_size - work_size);
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write(fd, last_buffer, sound_buffer_size);
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}
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D(bug("stream: data written\n"));
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} else
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goto silence;
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} else {
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// Audio not active, play silence
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silence: write(fd, silent_buffer, sound_buffer_size);
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}
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// We allow a maximum of three buffers to be sent
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sent += audio_frames_per_block;
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ioctl(fd, AUDIO_GETINFO, &status);
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while ((delta = sent - status.play.samples) > (audio_frames_per_block * 3)) {
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unsigned int sl = 1000000 * (delta - audio_frames_per_block * 3) / (AudioStatus.sample_rate >> 16);
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usleep(sl);
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ioctl(fd, AUDIO_GETINFO, &status);
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}
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}
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return NULL;
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}
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/*
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* MacOS audio interrupt, read next data block
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*/
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void AudioInterrupt(void)
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{
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D(bug("AudioInterrupt\n"));
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// Get data from apple mixer
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if (AudioStatus.mixer) {
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M68kRegisters r;
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r.a[0] = audio_data + adatStreamInfo;
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r.a[1] = AudioStatus.mixer;
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Execute68k(audio_data + adatGetSourceData, &r);
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D(bug(" GetSourceData() returns %08lx\n", r.d[0]));
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} else
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WriteMacInt32(audio_data + adatStreamInfo, 0);
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// Signal stream function
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sem_post(&audio_irq_done_sem);
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D(bug("AudioInterrupt done\n"));
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}
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/*
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* Set sampling parameters
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* "index" is an index into the audio_sample_rates[] etc. arrays
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* It is guaranteed that AudioStatus.num_sources == 0
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*/
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bool audio_set_sample_rate(int index)
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{
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return true;
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}
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bool audio_set_sample_size(int index)
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{
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return true;
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}
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bool audio_set_channels(int index)
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{
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return true;
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}
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/*
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* Get/set volume controls (volume values received/returned have the left channel
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* volume in the upper 16 bits and the right channel volume in the lower 16 bits;
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* both volumes are 8.8 fixed point values with 0x0100 meaning "maximum volume"))
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*/
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bool audio_get_main_mute(void)
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{
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return false;
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}
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uint32 audio_get_main_volume(void)
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{
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return 0x01000100;
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}
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bool audio_get_speaker_mute(void)
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{
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return false;
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}
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uint32 audio_get_speaker_volume(void)
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{
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return 0x01000100;
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}
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void audio_set_main_mute(bool mute)
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{
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}
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void audio_set_main_volume(uint32 vol)
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{
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}
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void audio_set_speaker_mute(bool mute)
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{
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}
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void audio_set_speaker_volume(uint32 vol)
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{
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}
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