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comparison src/audio/mint/SDL_mintaudio.h @ 961:185acc07127a

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Date: Fri, 29 Oct 2004 11:47:09 +0200 From: Patrice Mandin Subject: Reworked audio drivers for Atari platform These are reworked audio drivers for the Atari platform. Previous drivers were missing some features: - Test external clock plugged to DSP port on Atari Falcon 030. - Ability to select internal or external clock. So now, I generate a list of frequencies available, with the master clock and predivisor to use. One big caveat to this: I do not have an external clock, so I hope it works.
author Patrice Mandin <patmandin@gmail.com>
date Fri, 29 Oct 2004 09:56:53 +0000
parents b8d311d90021
children 39b5606fa543
comparison
equal deleted inserted replaced
960:eec28a5278be 961:185acc07127a
33 #include "SDL_mintaudio_stfa.h" 33 #include "SDL_mintaudio_stfa.h"
34 34
35 /* Hidden "this" pointer for the audio functions */ 35 /* Hidden "this" pointer for the audio functions */
36 #define _THIS SDL_AudioDevice *this 36 #define _THIS SDL_AudioDevice *this
37 37
38 /* 16 predivisors with 3 clocks max. */
39 #define MINTAUDIO_maxfreqs (16*3)
40
41 typedef struct {
42 Uint32 frequency;
43 Uint32 masterclock;
44 Uint32 predivisor;
45 } mint_frequency_t;
46
38 struct SDL_PrivateAudioData { 47 struct SDL_PrivateAudioData {
39 Uint32 hardfreq[16]; /* Array of replay freqs of the hardware */ 48 mint_frequency_t frequencies[MINTAUDIO_maxfreqs];
40 int sfreq; /* First number of freq to use in the array */ 49 int freq_count; /* Number of frequencies in the array */
41 int nfreq; /* Number of freqs to use in the array */
42 int numfreq; /* Number of selected frequency */ 50 int numfreq; /* Number of selected frequency */
43 }; 51 };
44 52
45 /* Old variable names */ 53 /* Old variable names */
46 #define MINTAUDIO_hardfreq (this->hidden->hardfreq) 54
47 #define MINTAUDIO_sfreq (this->hidden->sfreq) 55 #define MINTAUDIO_frequencies (this->hidden->frequencies)
48 #define MINTAUDIO_nfreq (this->hidden->nfreq) 56 #define MINTAUDIO_freqcount (this->hidden->freq_count)
49 #define MINTAUDIO_numfreq (this->hidden->numfreq) 57 #define MINTAUDIO_numfreq (this->hidden->numfreq)
50 58
51 /* _MCH cookie (values>>16) */ 59 /* _MCH cookie (values>>16) */
52 enum { 60 enum {
53 MCH_ST=0, 61 MCH_ST=0,
108 extern Uint8 *SDL_MintAudio_audiobuf[2]; /* Pointers to buffers */ 116 extern Uint8 *SDL_MintAudio_audiobuf[2]; /* Pointers to buffers */
109 extern unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */ 117 extern unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */
110 extern unsigned short SDL_MintAudio_numbuf; /* Buffer to play */ 118 extern unsigned short SDL_MintAudio_numbuf; /* Buffer to play */
111 extern unsigned short SDL_MintAudio_mutex; 119 extern unsigned short SDL_MintAudio_mutex;
112 extern cookie_stfa_t *SDL_MintAudio_stfa; 120 extern cookie_stfa_t *SDL_MintAudio_stfa;
121 extern unsigned long SDL_MintAudio_clocktics;
113 122
114 /* Functions */ 123 /* Functions */
115 void SDL_MintAudio_Callback(void); 124 void SDL_MintAudio_Callback(void);
116 int SDL_MintAudio_SearchFrequency(_THIS, int falcon_codec, int desired_freq); 125 void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock, Uint32 prediv);
126 int SDL_MintAudio_SearchFrequency(_THIS, int desired_freq);
117 127
118 /* ASM interrupt functions */ 128 /* ASM interrupt functions */
119 void SDL_MintAudio_GsxbInterrupt(void); 129 void SDL_MintAudio_GsxbInterrupt(void);
120 void SDL_MintAudio_EmptyGsxbInterrupt(void); 130 void SDL_MintAudio_EmptyGsxbInterrupt(void);
131 void SDL_MintAudio_XbiosInterruptMeasureClock(void);
121 void SDL_MintAudio_XbiosInterrupt(void); 132 void SDL_MintAudio_XbiosInterrupt(void);
122 void SDL_MintAudio_Dma8Interrupt(void); 133 void SDL_MintAudio_Dma8Interrupt(void);
123 void SDL_MintAudio_StfaInterrupt(void); 134 void SDL_MintAudio_StfaInterrupt(void);
124 135
125 #endif /* _SDL_mintaudio_h */ 136 #endif /* _SDL_mintaudio_h */