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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio.h')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio.h b/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio.h new file mode 100644 index 0000000..9a02580 --- /dev/null +++ b/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio.h @@ -0,0 +1,153 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2004 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; if not, write to the Free + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + Sam Lantinga + slouken@libsdl.org +*/ +#include "SDL_config.h" + +/* + MiNT audio driver + + Patrice Mandin +*/ + +#ifndef _SDL_mintaudio_h +#define _SDL_mintaudio_h + +#include "../SDL_sysaudio.h" +#include "SDL_mintaudio_stfa.h" + +/* Hidden "this" pointer for the audio functions */ +#define _THIS SDL_AudioDevice *this + +/* 16 predivisors with 3 clocks max. */ +#define MINTAUDIO_maxfreqs (16*3) + +typedef struct { + Uint32 frequency; + Uint32 masterclock; + Uint32 predivisor; + int gpio_bits; /* in case of external clock */ +} mint_frequency_t; + +struct SDL_PrivateAudioData { + mint_frequency_t frequencies[MINTAUDIO_maxfreqs]; + int freq_count; /* Number of frequencies in the array */ + int numfreq; /* Number of selected frequency */ +}; + +/* Old variable names */ + +#define MINTAUDIO_frequencies (this->hidden->frequencies) +#define MINTAUDIO_freqcount (this->hidden->freq_count) +#define MINTAUDIO_numfreq (this->hidden->numfreq) + +/* _MCH cookie (values>>16) */ +enum { + MCH_ST=0, + MCH_STE, + MCH_TT, + MCH_F30, + MCH_CLONE, + MCH_ARANYM +}; + +/* Master clocks for replay frequencies */ +#define MASTERCLOCK_STE 8010666 /* Not sure of this one */ +#define MASTERCLOCK_TT 16107953 /* Not sure of this one */ +#define MASTERCLOCK_FALCON1 25175000 +#define MASTERCLOCK_FALCON2 32000000 /* Only usable for DSP56K */ +#define MASTERCLOCK_FALCONEXT -1 /* Clock on DSP56K port, unknown */ +#define MASTERCLOCK_44K 22579200 /* Standard clock for 44.1 Khz */ +#define MASTERCLOCK_48K 24576000 /* Standard clock for 48 Khz */ + +/* Master clock predivisors */ +#define MASTERPREDIV_STE 160 +#define MASTERPREDIV_TT 320 +#define MASTERPREDIV_FALCON 256 +#define MASTERPREDIV_MILAN 256 + +/* MFP 68901 interrupt sources */ +enum { + MFP_PARALLEL=0, + MFP_DCD, + MFP_CTS, + MFP_BITBLT, + MFP_TIMERD, + MFP_BAUDRATE=MFP_TIMERD, + MFP_TIMERC, + MFP_200HZ=MFP_TIMERC, + MFP_ACIA, + MFP_DISK, + MFP_TIMERB, + MFP_HBLANK=MFP_TIMERB, + MFP_TERR, + MFP_TBE, + MFP_RERR, + MFP_RBF, + MFP_TIMERA, + MFP_DMASOUND=MFP_TIMERA, + MFP_RING, + MFP_MONODETECT +}; + +/* Xbtimer() timers */ +enum { + XB_TIMERA=0, + XB_TIMERB, + XB_TIMERC, + XB_TIMERD +}; + +/* Variables */ +extern SDL_AudioDevice *SDL_MintAudio_device; +extern Uint8 *SDL_MintAudio_audiobuf[2]; /* Pointers to buffers */ +extern unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */ +extern volatile unsigned short SDL_MintAudio_numbuf; /* Buffer to play */ +extern volatile unsigned short SDL_MintAudio_mutex; +extern cookie_stfa_t *SDL_MintAudio_stfa; +extern volatile unsigned long SDL_MintAudio_clocktics; +extern unsigned short SDL_MintAudio_hasfpu; /* To preserve fpu registers if needed */ + +/* MiNT thread variables */ +extern SDL_bool SDL_MintAudio_mint_present; +extern SDL_bool SDL_MintAudio_quit_thread; +extern SDL_bool SDL_MintAudio_thread_finished; +extern long SDL_MintAudio_thread_pid; + +/* Functions */ +void SDL_MintAudio_Callback(void); +void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock, + Uint32 prediv, int gpio_bits); +int SDL_MintAudio_SearchFrequency(_THIS, int desired_freq); +void SDL_MintAudio_CheckFpu(void); + +/* MiNT thread functions */ +int SDL_MintAudio_Thread(long param); +void SDL_MintAudio_WaitThread(void); + +/* ASM interrupt functions */ +void SDL_MintAudio_GsxbInterrupt(void); +void SDL_MintAudio_EmptyGsxbInterrupt(void); +void SDL_MintAudio_XbiosInterruptMeasureClock(void); +void SDL_MintAudio_XbiosInterrupt(void); +void SDL_MintAudio_Dma8Interrupt(void); +void SDL_MintAudio_StfaInterrupt(void); + +#endif /* _SDL_mintaudio_h */ |