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/* |
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* audio.h - Audio support |
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* |
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* Basilisk II (C) 1997-1999 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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#ifndef AUDIO_H |
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#define AUDIO_H |
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|
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extern int32 AudioDispatch(uint32 params, uint32 ti); |
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extern bool AudioAvailable; // Flag: audio output available (from the software point of view) |
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// System specific and internal functions/data |
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extern void AudioInit(void); |
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extern void AudioExit(void); |
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extern void AudioInterrupt(void); |
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extern void audio_enter_stream(void); |
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extern void audio_exit_stream(void); |
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extern void audio_set_sample_rate(int index); |
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extern void audio_set_sample_size(int index); |
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extern void audio_set_channels(int index); |
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extern bool audio_get_main_mute(void); |
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extern uint32 audio_get_main_volume(void); |
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extern bool audio_get_dac_mute(void); |
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extern uint32 audio_get_dac_volume(void); |
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extern void audio_set_main_mute(bool mute); |
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extern void audio_set_main_volume(uint32 vol); |
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extern void audio_set_dac_mute(bool mute); |
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extern void audio_set_dac_volume(uint32 vol); |
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// Current audio status |
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struct audio_status { |
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uint32 sample_rate; // 16.16 fixed point |
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uint32 sample_size; // 8 or 16 |
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uint32 channels; // 1 (mono) or 2 (stereo) |
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uint32 mixer; // Mac address of Apple Mixer |
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int num_sources; // Number of active sources |
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}; |
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extern struct audio_status AudioStatus; |
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extern bool audio_open; // Flag: audio is open and ready |
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extern int audio_frames_per_block; // Number of audio frames per block |
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extern uint32 audio_component_flags; // Component feature flags |
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extern int audio_num_sample_rates; // Number of supported sample rates |
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extern uint32 audio_sample_rates[]; // Array of supported sample rates (16.16 fixed point) |
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extern int audio_num_sample_sizes; // Number of supported sample sizes |
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extern uint16 audio_sample_sizes[]; // Array of supported sample sizes |
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extern int audio_num_channel_counts; // Number of supported channel counts |
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extern uint16 audio_channel_counts[]; // Array of supported channels counts |
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// Audio component global data and 68k routines |
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enum { |
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adatDelegateCall = 0, // 68k code to call DelegateCall() |
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adatOpenMixer = 14, // 68k code to call OpenMixerSoundComponent() |
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adatCloseMixer = 36, // 68k code to call CloseMixerSoundComponent() |
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adatGetInfo = 54, // 68k code to call GetInfo() |
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adatSetInfo = 78, // 68k code to call SetInfo() |
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adatPlaySourceBuffer = 102, // 68k code to call PlaySourceBuffer() |
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adatGetSourceData = 126, // 68k code to call GetSourceData() |
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adatData = 146, // SoundComponentData struct |
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adatMixer = 174, // Mac address of mixer, returned by adatOpenMixer |
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adatStreamInfo = 178, // Mac address of stream info, returned by adatGetSourceData |
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SIZEOF_adat = 182 |
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}; |
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extern uint32 audio_data; // Mac address of global data area |
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#endif |
