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/* |
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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) 1997-2002 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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|
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#include "sysdeps.h" |
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|
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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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|
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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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|
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#define DEBUG 0 |
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#include "debug.h" |
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|
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|
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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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|
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// Prototypes |
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static void *stream_func(void *arg); |
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|
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|
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/* |
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* Initialization |
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*/ |
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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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|
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void AudioInit(void) |
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{ |
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char str[256]; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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/* |
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* Deinitialization |
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*/ |
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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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|
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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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|
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/* |
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* First source added, start audio stream |
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*/ |
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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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|
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/* |
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* Last source removed, stop audio stream |
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*/ |
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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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|
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/* |
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* Streaming function |
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*/ |
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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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|
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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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|
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uint_t sent = 0, delta; |
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struct audio_info status; |
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|
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for (;;) { |
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if (AudioStatus.num_sources) { |
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|
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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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|
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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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|
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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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|
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} else { |
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|
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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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|
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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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|
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/* |
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* MacOS audio interrupt, read next data block |
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*/ |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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void audio_set_main_mute(bool mute) |
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{ |
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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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|
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void audio_set_speaker_mute(bool mute) |
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{ |
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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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} |
