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comparison src/audio/mint/SDL_mintaudio.h @ 644:594422ab8f9f

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Atari MiNT: added more audio drivers
author Patrice Mandin <patmandin@gmail.com>
date Mon, 07 Jul 2003 19:16:03 +0000
parents d219b0e02f5f
children c4803992e09c
comparison
equal deleted inserted replaced
643:564716cfb502 644:594422ab8f9f
1 /* 1 /*
2 * MiNT audio driver 2 SDL - Simple DirectMedia Layer
3 * 3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
4 * Patrice Mandin 4
5 */ 5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22
23 /*
24 MiNT audio driver
25
26 Patrice Mandin
27 */
6 28
7 #ifndef _SDL_mintaudio_h 29 #ifndef _SDL_mintaudio_h
8 #define _SDL_mintaudio_h 30 #define _SDL_mintaudio_h
9 31
10 #include "SDL_sysaudio.h" 32 #include "SDL_sysaudio.h"
33 #include "SDL_mintaudio_stfa.h"
11 34
12 /* Hidden "this" pointer for the audio functions */ 35 /* Hidden "this" pointer for the audio functions */
13 #define _THIS SDL_AudioDevice *this 36 #define _THIS SDL_AudioDevice *this
14 37
38 struct SDL_PrivateAudioData {
39 Uint32 hardfreq[16]; /* Array of replay freqs of the hardware */
40 int sfreq; /* First number of freq to use in the array */
41 int nfreq; /* Number of freqs to use in the array */
42 int numfreq; /* Number of selected frequency */
43 };
44
45 /* Old variable names */
46 #define MINTAUDIO_hardfreq (this->hidden->hardfreq)
47 #define MINTAUDIO_sfreq (this->hidden->sfreq)
48 #define MINTAUDIO_nfreq (this->hidden->nfreq)
49 #define MINTAUDIO_numfreq (this->hidden->numfreq)
50
51 /* _MCH cookie (values>>16) */
52 enum {
53 MCH_ST=0,
54 MCH_STE,
55 MCH_TT,
56 MCH_F30
57 };
58
59 /* Master clocks for replay frequencies */
60 #define MASTERCLOCK_STE 8010666 /* Not sure of this one */
61 #define MASTERCLOCK_TT 16107953 /* Not sure of this one */
62 #define MASTERCLOCK_FALCON1 25175000
63 #define MASTERCLOCK_FALCON2 32000000 /* Only usable for DSP56K */
64 #define MASTERCLOCK_FALCONEXT -1 /* Clock on DSP56K port, unknown */
65 #define MASTERCLOCK_44K 22579200 /* Standard clock for 44.1 Khz */
66 #define MASTERCLOCK_48K 24576000 /* Standard clock for 48 Khz */
67
68 /* Master clock predivisors */
69 #define MASTERPREDIV_STE 160
70 #define MASTERPREDIV_TT 320
71 #define MASTERPREDIV_FALCON 256
72 #define MASTERPREDIV_MILAN 256
73
74 /* MFP 68901 interrupt sources */
75 enum {
76 MFP_PARALLEL=0,
77 MFP_DCD,
78 MFP_CTS,
79 MFP_BITBLT,
80 MFP_TIMERD,
81 MFP_BAUDRATE=MFP_TIMERD,
82 MFP_TIMERC,
83 MFP_200HZ=MFP_TIMERC,
84 MFP_ACIA,
85 MFP_DISK,
86 MFP_TIMERB,
87 MFP_HBLANK=MFP_TIMERB,
88 MFP_TERR,
89 MFP_TBE,
90 MFP_RERR,
91 MFP_RBF,
92 MFP_TIMERA,
93 MFP_DMASOUND=MFP_TIMERA,
94 MFP_RING,
95 MFP_MONODETECT
96 };
97
98 /* Xbtimer() timers */
99 enum {
100 XB_TIMERA=0,
101 XB_TIMERB,
102 XB_TIMERC,
103 XB_TIMERD
104 };
105
106 /* Variables */
107 extern SDL_AudioDevice *SDL_MintAudio_device;
108 extern Uint8 *SDL_MintAudio_audiobuf[2]; /* Pointers to buffers */
109 extern long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */
110 extern long SDL_MintAudio_numbuf; /* Buffer to play */
111 extern long SDL_MintAudio_mutex;
112 extern cookie_stfa_t *SDL_MintAudio_stfa;
113
114 /* Functions */
115 void SDL_MintAudio_Callback(void);
116 int SDL_MintAudio_SearchFrequency(_THIS, int falcon_codec, int desired_freq);
117
118 /* ASM interrupt functions */
119 void SDL_MintAudio_GsxbInterrupt(void);
120 void SDL_MintAudio_EmptyGsxbInterrupt(void);
121 void SDL_MintAudio_XbiosInterrupt(void);
122 void SDL_MintAudio_Dma8Interrupt(void);
123 void SDL_MintAudio_StfaInterrupt(void);
124
15 #endif /* _SDL_mintaudio_h */ 125 #endif /* _SDL_mintaudio_h */