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annotate src/audio/mint/SDL_mintaudio_it.S @ 1029:f87f87efd45a

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Date: Mon, 17 Jan 2005 20:54:50 +0200 From: Ville [snip] Subject: [PATCH] SDL/DirectFB: remove Matrox CRTC2 flicker filter Hi, This patch removes the flicker filter option from the DirectFB backend's Matrox CRTC2 code in SDL. I will be removing the option from DirectFB (because it doesn't actually work) and that would cause the SDL code to fail without this fix. I was going to send this to some SDL list directly but libsdl.org is down so I'm not sure what if any lists there are. Thomas Jarosch (the guy who wrote the code) said you would accept SDL patches. Let me know if I should send this somewhere else. -- Ville Syrj�l� syrjala _at sci.fi http://www.sci.fi/~syrjala/
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 17 Jan 2005 19:38:28 +0000
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children d00b4d8508ab
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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 Audio interrupts
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25
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26 Patrice Mandin, Didier Méquignon
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27 */
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28
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29 .text
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30
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31 .globl _SDL_MintAudio_Callback
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32
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33 .globl _SDL_MintAudio_GsxbInterrupt
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34 .globl _SDL_MintAudio_EmptyGsxbInterrupt
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35 .globl _SDL_MintAudio_XbiosInterrupt
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36 .globl _SDL_MintAudio_XbiosInterruptMeasureClock
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37 .globl _SDL_MintAudio_Dma8Interrupt
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38 .globl _SDL_MintAudio_StfaInterrupt
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39
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40 .globl _SDL_MintAudio_mutex
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41 .globl _SDL_MintAudio_audiobuf
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42 .globl _SDL_MintAudio_numbuf
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43 .globl _SDL_MintAudio_audiosize
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44 .globl _SDL_MintAudio_clocktics
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45
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46 .globl _SDL_MintAudio_stfa
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47
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48 /*
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49 How it works:
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50 - Audio is playing buffer #0 (resp. #1)
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51 - We must calculate a sample in buffer #1 (resp. #0)
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52 so we first call the callback to do it
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53 - Then we swap the buffers
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54 */
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55
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56 /*--- GSXB interrupt vector ---*/
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57
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58 .text
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59 _SDL_MintAudio_GsxbInterrupt:
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60
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61 /* Check if we are not already running */
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62 tstw _SDL_MintAudio_mutex
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63 bnes _SDL_MintAudio_EmptyGsxbInterrupt
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64 notw _SDL_MintAudio_mutex
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65
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66 /* Swap buffers */
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67 eorw #1,_SDL_MintAudio_numbuf
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68
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69 moveml d0-d2/a0-a2,sp@-
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70
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71 /* Callback */
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72 jsr _SDL_MintAudio_Callback
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73
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74 /* Set new buffer */
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75
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76 moveq #0,d0
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77 movel _SDL_MintAudio_audiosize,d1
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78
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79 movew _SDL_MintAudio_numbuf,d0
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80 lsll #2,d0
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81 lea _SDL_MintAudio_audiobuf,a0
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82 movel a0@(d0:l),a1
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83
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84 lea a1@(d1:l),a2
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86 movel a2,sp@-
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87 movel a1,sp@-
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88 clrw sp@-
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89 movew #131,sp@-
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90 trap #14
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91 lea sp@(12),sp
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93 moveml sp@+,d0-d2/a0-a2
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94
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95 clrw _SDL_MintAudio_mutex
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96 _SDL_MintAudio_EmptyGsxbInterrupt:
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97 rts
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98
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99 /*--- Xbios interrupt vector to measure Falcon external clock ---*/
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100
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101 _SDL_MintAudio_XbiosInterruptMeasureClock: /* 1 mS */
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102
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103 btst #0,0xFFFF8901:w /* state DMA sound */
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104 beqs SDL_MintAudio_EndIntMeasure
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105 addql #1,_SDL_MintAudio_clocktics
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106 SDL_MintAudio_EndIntMeasure:
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107 bclr #5,0xFFFFFA0F:w /* Clear service bit */
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108 rte
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109
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110 /*--- Xbios interrupt vector ---*/
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111
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112 _SDL_MintAudio_XbiosInterrupt:
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113
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114 /* Reenable interrupts, so other interrupts can work */
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115 movew #0x2300,sr
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116
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117 /* Clear service bit, so other MFP interrupts can work */
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118 bclr #5,0xfffffa0f:w
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119
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120 /* Check if we are not already running */
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121 tstw _SDL_MintAudio_mutex
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122 bnes SDL_MintAudio_XbiosEnd
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123 notw _SDL_MintAudio_mutex
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124
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125 /* Swap buffers */
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126 eorw #1,_SDL_MintAudio_numbuf
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127
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130 /* Callback */
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131 jsr _SDL_MintAudio_Callback
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133 /* Set new buffer */
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135 moveq #0,d0
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136 movel _SDL_MintAudio_audiosize,d1
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138 movew _SDL_MintAudio_numbuf,d0
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139 lsll #2,d0
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140 lea _SDL_MintAudio_audiobuf,a0
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141 movel a0@(d0:l),a1
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143 lea a1@(d1:l),a2
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145 movel a2,sp@-
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146 movel a1,sp@-
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147 clrw sp@-
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
148 movew #131,sp@-
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Patrice Mandin <patmandin@gmail.com>
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149 trap #14
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150 lea sp@(12),sp
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151
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152 moveml sp@+,d0-d2/a0-a2
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153
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154 clrw _SDL_MintAudio_mutex
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155 SDL_MintAudio_XbiosEnd:
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156 rte
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157
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158 /*--- DMA 8 bits interrupt vector ---*/
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159
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160 _SDL_MintAudio_Dma8Interrupt:
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161
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162 /* Reenable interrupts, so other interrupts can work */
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163 movew #0x2300,sr
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164
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165 /* Clear service bit, so other MFP interrupts can work */
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166 bclr #5,0xfffffa0f:w
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167
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168 /* Check if we are not already running */
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169 tstw _SDL_MintAudio_mutex
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170 bnes SDL_MintAudio_Dma8End
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171 notw _SDL_MintAudio_mutex
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172
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173 /* Swap buffers */
704
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174 eorw #1,_SDL_MintAudio_numbuf
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175
644
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176 moveml d0-d1/a0-a1,sp@-
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177
704
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178 /* Callback */
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179 jsr _SDL_MintAudio_Callback
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180
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181 /* Set new buffer */
644
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182
704
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183 moveq #0,d0
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184
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185 movew _SDL_MintAudio_numbuf,d0
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
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186 lslw #2,d0
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
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187 lea _SDL_MintAudio_audiobuf,a0
c4803992e09c Small bugfixes
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188 movel a0@(d0:w),d1
644
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189
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parents:
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190 /* Modify DMA addresses */
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191 lea 0xffff8900:w,a0
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parents:
diff changeset
192
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193 moveb d1,a0@(0x07) /* Start address */
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194 rorl #8,d1
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195 moveb d1,a0@(0x05)
594422ab8f9f Atari MiNT: added more audio drivers
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196 rorl #8,d1
594422ab8f9f Atari MiNT: added more audio drivers
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197 moveb d1,a0@(0x03)
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198 swap d1
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199
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200 addl _SDL_MintAudio_audiosize,d1
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diff changeset
201
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parents:
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202 moveb d1,a0@(0x13) /* End address */
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diff changeset
203 rorl #8,d1
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
204 moveb d1,a0@(0x11)
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205 rorl #8,d1
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
206 moveb d1,a0@(0x0f)
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parents:
diff changeset
207
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
208 moveml sp@+,d0-d1/a0-a1
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parents:
diff changeset
209
594422ab8f9f Atari MiNT: added more audio drivers
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210 clrw _SDL_MintAudio_mutex
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211 SDL_MintAudio_Dma8End:
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212 rte
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parents:
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213
594422ab8f9f Atari MiNT: added more audio drivers
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214 /*--- STFA interrupt vector ---*/
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215
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216 STFA_SOUND_START = 6
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217 STFA_SOUND_END = STFA_SOUND_START+8
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218
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219 _SDL_MintAudio_StfaInterrupt:
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220
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parents:
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221 /* Reenable interrupts, so other interrupts can work */
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Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
222 movew #0x2300,sr
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
223
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
224 /* Check if we are not already running */
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parents:
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225 tstw _SDL_MintAudio_mutex
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226 bnes SDL_MintAudio_StfaEnd
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227 notw _SDL_MintAudio_mutex
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228
594422ab8f9f Atari MiNT: added more audio drivers
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229 /* Swap buffers */
704
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Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
230 eorw #1,_SDL_MintAudio_numbuf
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
231
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
232 moveml d0-d1/a0-a1,sp@-
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
233
704
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Patrice Mandin <patmandin@gmail.com>
parents: 644
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234 /* Callback */
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Patrice Mandin <patmandin@gmail.com>
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235 jsr _SDL_MintAudio_Callback
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parents: 644
diff changeset
236
c4803992e09c Small bugfixes
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parents: 644
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237 /* Set new buffer */
644
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diff changeset
238
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
239 moveq #0,d0
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
240 movel _SDL_MintAudio_stfa,a1
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
241
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
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242 movew _SDL_MintAudio_numbuf,d0
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
243 lslw #2,d0
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
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244 lea _SDL_MintAudio_audiobuf,a0
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
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245 movel a0@(d0:w),d1
644
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parents:
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246
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
247 /* Modify STFA replay buffers */
704
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Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
248 movel d1,a1@(STFA_SOUND_START)
644
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parents:
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249 addl _SDL_MintAudio_audiosize,d1
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
250 movel d1,a1@(STFA_SOUND_END)
644
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parents:
diff changeset
251
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
252 moveml sp@+,d0-d1/a0-a1
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
253
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
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254 clrw _SDL_MintAudio_mutex
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
255 SDL_MintAudio_StfaEnd:
594422ab8f9f Atari MiNT: added more audio drivers
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256 rte