e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 Sam Lantinga |
4 | |
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 | #include "SDL_config.h" |
23 | |
24 | /* |
25 | MiNT audio driver |
26 | |
27 | Patrice Mandin |
28 | */ |
29 | |
30 | #ifndef _SDL_mintaudio_h |
31 | #define _SDL_mintaudio_h |
32 | |
33 | #include "../SDL_sysaudio.h" |
34 | #include "SDL_mintaudio_stfa.h" |
35 | |
36 | /* Hidden "this" pointer for the audio functions */ |
37 | #define _THIS SDL_AudioDevice *this |
38 | |
39 | /* 16 predivisors with 3 clocks max. */ |
40 | #define MINTAUDIO_maxfreqs (16*3) |
41 | |
42 | typedef struct { |
43 | Uint32 frequency; |
44 | Uint32 masterclock; |
45 | Uint32 predivisor; |
46 | int gpio_bits; /* in case of external clock */ |
47 | } mint_frequency_t; |
48 | |
49 | struct SDL_PrivateAudioData { |
50 | mint_frequency_t frequencies[MINTAUDIO_maxfreqs]; |
51 | int freq_count; /* Number of frequencies in the array */ |
52 | int numfreq; /* Number of selected frequency */ |
53 | }; |
54 | |
55 | /* Old variable names */ |
56 | |
57 | #define MINTAUDIO_frequencies (this->hidden->frequencies) |
58 | #define MINTAUDIO_freqcount (this->hidden->freq_count) |
59 | #define MINTAUDIO_numfreq (this->hidden->numfreq) |
60 | |
61 | /* _MCH cookie (values>>16) */ |
62 | enum { |
63 | MCH_ST=0, |
64 | MCH_STE, |
65 | MCH_TT, |
66 | MCH_F30, |
67 | MCH_CLONE, |
68 | MCH_ARANYM |
69 | }; |
70 | |
71 | /* Master clocks for replay frequencies */ |
72 | #define MASTERCLOCK_STE 8010666 /* Not sure of this one */ |
73 | #define MASTERCLOCK_TT 16107953 /* Not sure of this one */ |
74 | #define MASTERCLOCK_FALCON1 25175000 |
75 | #define MASTERCLOCK_FALCON2 32000000 /* Only usable for DSP56K */ |
76 | #define MASTERCLOCK_FALCONEXT -1 /* Clock on DSP56K port, unknown */ |
77 | #define MASTERCLOCK_44K 22579200 /* Standard clock for 44.1 Khz */ |
78 | #define MASTERCLOCK_48K 24576000 /* Standard clock for 48 Khz */ |
79 | |
80 | /* Master clock predivisors */ |
81 | #define MASTERPREDIV_STE 160 |
82 | #define MASTERPREDIV_TT 320 |
83 | #define MASTERPREDIV_FALCON 256 |
84 | #define MASTERPREDIV_MILAN 256 |
85 | |
86 | /* MFP 68901 interrupt sources */ |
87 | #ifndef MFP_PARALLEL |
88 | enum { |
89 | MFP_PARALLEL=0, |
90 | MFP_DCD, |
91 | MFP_CTS, |
92 | MFP_BITBLT, |
93 | MFP_TIMERD, |
94 | MFP_BAUDRATE=MFP_TIMERD, |
95 | MFP_TIMERC, |
96 | MFP_200HZ=MFP_TIMERC, |
97 | MFP_ACIA, |
98 | MFP_DISK, |
99 | MFP_TIMERB, |
100 | MFP_HBLANK=MFP_TIMERB, |
101 | MFP_TERR, |
102 | MFP_TBE, |
103 | MFP_RERR, |
104 | MFP_RBF, |
105 | MFP_TIMERA, |
106 | MFP_DMASOUND=MFP_TIMERA, |
107 | MFP_RING, |
108 | MFP_MONODETECT |
109 | }; |
110 | #endif |
111 | |
112 | /* Xbtimer() timers */ |
113 | #ifndef XB_TIMERA |
114 | enum { |
115 | XB_TIMERA=0, |
116 | XB_TIMERB, |
117 | XB_TIMERC, |
118 | XB_TIMERD |
119 | }; |
120 | #endif |
121 | |
122 | /* Variables */ |
123 | extern SDL_AudioDevice *SDL_MintAudio_device; |
124 | extern Uint8 *SDL_MintAudio_audiobuf[2]; /* Pointers to buffers */ |
125 | extern unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */ |
126 | extern volatile unsigned short SDL_MintAudio_numbuf; /* Buffer to play */ |
127 | extern volatile unsigned short SDL_MintAudio_mutex; |
128 | extern cookie_stfa_t *SDL_MintAudio_stfa; |
129 | extern volatile unsigned long SDL_MintAudio_clocktics; |
130 | extern unsigned short SDL_MintAudio_hasfpu; /* To preserve fpu registers if needed */ |
131 | |
132 | /* MiNT thread variables */ |
133 | extern SDL_bool SDL_MintAudio_mint_present; |
134 | extern SDL_bool SDL_MintAudio_quit_thread; |
135 | extern SDL_bool SDL_MintAudio_thread_finished; |
136 | extern long SDL_MintAudio_thread_pid; |
137 | |
138 | /* Functions */ |
139 | void SDL_MintAudio_Callback(void); |
140 | void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock, |
141 | Uint32 prediv, int gpio_bits); |
142 | int SDL_MintAudio_SearchFrequency(_THIS, int desired_freq); |
143 | void SDL_MintAudio_CheckFpu(void); |
144 | |
145 | /* MiNT thread functions */ |
146 | int SDL_MintAudio_Thread(long param); |
147 | void SDL_MintAudio_WaitThread(void); |
148 | |
149 | /* ASM interrupt functions */ |
150 | void SDL_MintAudio_GsxbInterrupt(void); |
151 | void SDL_MintAudio_EmptyGsxbInterrupt(void); |
152 | void SDL_MintAudio_XbiosInterruptMeasureClock(void); |
153 | void SDL_MintAudio_XbiosInterrupt(void); |
154 | void SDL_MintAudio_Dma8Interrupt(void); |
155 | void SDL_MintAudio_StfaInterrupt(void); |
156 | |
157 | #endif /* _SDL_mintaudio_h */ |