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annotate src/audio/mint/SDL_mintaudio.h @ 756:10332c6fad2e

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te: Mon, 15 Dec 2003 08:25:14 -0800 PST From: "Andrew Bachmann" Subject: libSDL patches for beos video I created some patches to SDL: 1. YUV overlay support 2. maintain high refresh rate when changing resolutions to a lower resolution
author Sam Lantinga <slouken@libsdl.org>
date Tue, 16 Dec 2003 13:04:44 +0000
parents c4803992e09c
children b8d311d90021
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /*
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24 MiNT audio driver
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25
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26 Patrice Mandin
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27 */
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28
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29 #ifndef _SDL_mintaudio_h
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30 #define _SDL_mintaudio_h
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31
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32 #include "SDL_sysaudio.h"
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33 #include "SDL_mintaudio_stfa.h"
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34
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35 /* Hidden "this" pointer for the audio functions */
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36 #define _THIS SDL_AudioDevice *this
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37
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38 struct SDL_PrivateAudioData {
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39 Uint32 hardfreq[16]; /* Array of replay freqs of the hardware */
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40 int sfreq; /* First number of freq to use in the array */
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41 int nfreq; /* Number of freqs to use in the array */
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42 int numfreq; /* Number of selected frequency */
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43 };
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44
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45 /* Old variable names */
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46 #define MINTAUDIO_hardfreq (this->hidden->hardfreq)
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47 #define MINTAUDIO_sfreq (this->hidden->sfreq)
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48 #define MINTAUDIO_nfreq (this->hidden->nfreq)
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49 #define MINTAUDIO_numfreq (this->hidden->numfreq)
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50
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51 /* _MCH cookie (values>>16) */
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52 enum {
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53 MCH_ST=0,
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54 MCH_STE,
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55 MCH_TT,
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56 MCH_F30
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57 };
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58
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59 /* Master clocks for replay frequencies */
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60 #define MASTERCLOCK_STE 8010666 /* Not sure of this one */
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61 #define MASTERCLOCK_TT 16107953 /* Not sure of this one */
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62 #define MASTERCLOCK_FALCON1 25175000
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63 #define MASTERCLOCK_FALCON2 32000000 /* Only usable for DSP56K */
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64 #define MASTERCLOCK_FALCONEXT -1 /* Clock on DSP56K port, unknown */
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65 #define MASTERCLOCK_44K 22579200 /* Standard clock for 44.1 Khz */
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66 #define MASTERCLOCK_48K 24576000 /* Standard clock for 48 Khz */
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67
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68 /* Master clock predivisors */
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69 #define MASTERPREDIV_STE 160
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70 #define MASTERPREDIV_TT 320
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71 #define MASTERPREDIV_FALCON 256
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72 #define MASTERPREDIV_MILAN 256
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73
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74 /* MFP 68901 interrupt sources */
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75 enum {
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76 MFP_PARALLEL=0,
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77 MFP_DCD,
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78 MFP_CTS,
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79 MFP_BITBLT,
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80 MFP_TIMERD,
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81 MFP_BAUDRATE=MFP_TIMERD,
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82 MFP_TIMERC,
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83 MFP_200HZ=MFP_TIMERC,
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84 MFP_ACIA,
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85 MFP_DISK,
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86 MFP_TIMERB,
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87 MFP_HBLANK=MFP_TIMERB,
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88 MFP_TERR,
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89 MFP_TBE,
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90 MFP_RERR,
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91 MFP_RBF,
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92 MFP_TIMERA,
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93 MFP_DMASOUND=MFP_TIMERA,
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94 MFP_RING,
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95 MFP_MONODETECT
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96 };
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97
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98 /* Xbtimer() timers */
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99 enum {
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100 XB_TIMERA=0,
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101 XB_TIMERB,
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102 XB_TIMERC,
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103 XB_TIMERD
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104 };
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105
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106 /* Variables */
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107 extern SDL_AudioDevice *SDL_MintAudio_device;
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108 extern Uint8 *SDL_MintAudio_audiobuf[2]; /* Pointers to buffers */
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109 extern unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */
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110 extern unsigned short SDL_MintAudio_numbuf; /* Buffer to play */
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111 extern unsigned short SDL_MintAudio_mutex;
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112 extern cookie_stfa_t *SDL_MintAudio_stfa;
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113
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114 /* Functions */
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115 void SDL_MintAudio_Callback(void);
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116 int SDL_MintAudio_SearchFrequency(_THIS, int falcon_codec, int desired_freq);
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117
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118 /* ASM interrupt functions */
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119 void SDL_MintAudio_GsxbInterrupt(void);
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120 void SDL_MintAudio_EmptyGsxbInterrupt(void);
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121 void SDL_MintAudio_XbiosInterrupt(void);
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122 void SDL_MintAudio_Dma8Interrupt(void);
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123 void SDL_MintAudio_StfaInterrupt(void);
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124
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125 #endif /* _SDL_mintaudio_h */