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/* |
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* audio_irix.cpp - Audio support, SGI Irix implementation |
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* |
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* Basilisk II (C) 1997-2001 Christian Bauer |
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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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#include "debug.h" |
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// Supported sample rates, sizes and channels (defaults) |
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int audio_num_sample_rates = 1; |
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uint32 audio_sample_rates[] = {44100 << 16}; |
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int audio_num_sample_sizes = 1; |
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uint16 audio_sample_sizes[] = {16}; |
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int audio_num_channel_counts = 1; |
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uint16 audio_channel_counts[] = {2}; |
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// Global variables |
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static int audio_fd = -1; // fd from audio library |
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static sem_t audio_irq_done_sem; // Signal from interrupt to streaming thread: data block read |
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void AudioInit(void) |
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{ |
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// Init audio status (defaults) 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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sem_inited = true; |
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// Start streaming thread |
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pthread_attr_init(&stream_thread_attr); |
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#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) |
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if (geteuid() == 0) { |
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pthread_attr_setinheritsched(&stream_thread_attr, PTHREAD_EXPLICIT_SCHED); |
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pthread_attr_setschedpolicy(&stream_thread_attr, SCHED_FIFO); |
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struct sched_param fifo_param; |
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fifo_param.sched_priority = (sched_get_priority_min(SCHED_FIFO) + sched_get_priority_max(SCHED_FIFO)) / 2; |
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pthread_attr_setschedparam(&stream_thread_attr, &fifo_param); |
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} |
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#endif |
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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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* It is guaranteed that AudioStatus.num_sources == 0 |
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*/ |
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void audio_set_sample_rate(int index) |
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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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void audio_set_sample_size(int index) |
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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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void audio_set_channels(int index) |
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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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