annotate src/audio/amigaos/SDL_ahiaudio.c @ 1026:0f3aa6ab3341

Select patches included from The NetBSD Package Collection (www.pkgsrc.org)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 12 Jan 2005 06:04:48 +0000
parents dcb5e869f8b5
children c9b51268668f
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998 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 5635-34 Springhouse Dr.
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21 Pleasanton, CA 94588 (USA)
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22 slouken@libsdl.org
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23 */
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24
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25 #ifdef SAVE_RCSID
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26 static char rcsid =
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27 "@(#) $Id$";
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28 #endif
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29
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30 /* Allow access to a raw mixing buffer (for AmigaOS) */
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31
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32 #include "SDL_endian.h"
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33 #include "SDL_audio.h"
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34 #include "SDL_audiomem.h"
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35 #include "SDL_audio_c.h"
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36 #include "SDL_ahiaudio.h"
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37
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38 /* Audio driver functions */
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39 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec);
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40 static void AHI_WaitAudio(_THIS);
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41 static void AHI_PlayAudio(_THIS);
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42 static Uint8 *AHI_GetAudioBuf(_THIS);
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43 static void AHI_CloseAudio(_THIS);
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44
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45 #ifndef __SASC
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46 #define mymalloc(x) AllocVec(x,MEMF_PUBLIC)
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47 #define myfree FreeVec
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48 #else
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49 #define mymalloc malloc
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50 #define myfree free
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51 #endif
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52
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53 /* Audio driver bootstrap functions */
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54
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55 static int Audio_Available(void)
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56 {
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57 int ok=0;
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58 struct MsgPort *p;
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59 struct AHIRequest *req;
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60
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61 if(p=CreateMsgPort())
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62 {
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63 if(req=(struct AHIRequest *)CreateIORequest(p,sizeof(struct AHIRequest)))
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64 {
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65 req->ahir_Version=4;
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66
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67 if(!OpenDevice(AHINAME,0,(struct IORequest *)req,NULL))
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68 {
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69 D(bug("AHI available.\n"));
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70 ok=1;
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71 CloseDevice((struct IORequest *)req);
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72 }
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73 DeleteIORequest((struct IORequest *)req);
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74 }
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75 DeleteMsgPort(p);
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76 }
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77
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78 D(if(!ok) bug("AHI not available\n"));
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79 return ok;
0
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80 }
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81
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82 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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83 {
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84 free(device->hidden);
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85 free(device);
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86 }
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87
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88 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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89 {
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90 SDL_AudioDevice *this;
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91
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92 #ifndef NO_AMIGADEBUG
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93 D(bug("AHI created...\n"));
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94 #endif
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95
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96 /* Initialize all variables that we clean on shutdown */
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97 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
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98 if ( this ) {
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99 memset(this, 0, (sizeof *this));
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100 this->hidden = (struct SDL_PrivateAudioData *)
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101 malloc((sizeof *this->hidden));
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102 }
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103 if ( (this == NULL) || (this->hidden == NULL) ) {
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104 SDL_OutOfMemory();
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105 if ( this ) {
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106 free(this);
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107 }
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108 return(0);
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109 }
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110 memset(this->hidden, 0, (sizeof *this->hidden));
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111
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112 /* Set the function pointers */
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113 this->OpenAudio = AHI_OpenAudio;
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114 this->WaitAudio = AHI_WaitAudio;
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115 this->PlayAudio = AHI_PlayAudio;
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116 this->GetAudioBuf = AHI_GetAudioBuf;
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117 this->CloseAudio = AHI_CloseAudio;
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118
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119 this->free = Audio_DeleteDevice;
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120
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121 return this;
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122 }
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123
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124 AudioBootStrap AHI_bootstrap = {
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125 "AHI", Audio_Available, Audio_CreateDevice
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126 };
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127
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128
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129 void static AHI_WaitAudio(_THIS)
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130 {
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131 if(!CheckIO((struct IORequest *)audio_req[current_buffer]))
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132 {
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133 WaitIO((struct IORequest *)audio_req[current_buffer]);
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134 // AbortIO((struct IORequest *)audio_req[current_buffer]);
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135 }
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136 }
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137
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138 static void AHI_PlayAudio(_THIS)
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139 {
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140 if(playing>1)
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141 WaitIO((struct IORequest *)audio_req[current_buffer]);
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142
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143 /* Write the audio data out */
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144 audio_req[current_buffer] -> ahir_Std. io_Message.mn_Node.ln_Pri = 60;
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145 audio_req[current_buffer] -> ahir_Std. io_Data = mixbuf[current_buffer];
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146 audio_req[current_buffer] -> ahir_Std. io_Length = this->hidden->size;
0
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147 audio_req[current_buffer] -> ahir_Std. io_Offset = 0;
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148 audio_req[current_buffer] -> ahir_Std . io_Command = CMD_WRITE;
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149 audio_req[current_buffer] -> ahir_Frequency = this->hidden->freq;
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150 audio_req[current_buffer] -> ahir_Volume = 0x10000;
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151 audio_req[current_buffer] -> ahir_Type = this->hidden->type;
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152 audio_req[current_buffer] -> ahir_Position = 0x8000;
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153 audio_req[current_buffer] -> ahir_Link = (playing>0 ? audio_req[current_buffer^1] : NULL);
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154
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155 SendIO((struct IORequest *)audio_req[current_buffer]);
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156 current_buffer^=1;
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157
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158 playing++;
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159 }
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160
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161 static Uint8 *AHI_GetAudioBuf(_THIS)
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162 {
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163 return(mixbuf[current_buffer]);
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164 }
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165
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166 static void AHI_CloseAudio(_THIS)
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167 {
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168 D(bug("Closing audio...\n"));
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169
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170 playing=0;
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171
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172 if(audio_req[0])
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173 {
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174 if(audio_req[1])
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175 {
21
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176 D(bug("Break req[1]...\n"));
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177
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178 AbortIO((struct IORequest *)audio_req[1]);
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179 WaitIO((struct IORequest *)audio_req[1]);
0
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180 }
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181
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182 D(bug("Break req[0]...\n"));
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183
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184 AbortIO((struct IORequest *)audio_req[0]);
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185 WaitIO((struct IORequest *)audio_req[0]);
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186
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187 if(audio_req[1])
0
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188 {
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189 D(bug("Break AGAIN req[1]...\n"));
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190 AbortIO((struct IORequest *)audio_req[1]);
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191 WaitIO((struct IORequest *)audio_req[1]);
0
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192 }
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193 // Double abort to be sure to break the dbuffering process.
0
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194
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195 SDL_Delay(200);
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196
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197 D(bug("Reqs breaked, closing device...\n"));
0
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198 CloseDevice((struct IORequest *)audio_req[0]);
21
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199 D(bug("Device closed, freeing memory...\n"));
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200 myfree(audio_req[1]);
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201 D(bug("Memory freed, deleting IOReq...\n"));
0
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202 DeleteIORequest((struct IORequest *)audio_req[0]);
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203 audio_req[0]=audio_req[1]=NULL;
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204 }
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205
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206 D(bug("Freeing mixbuf[0]...\n"));
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207 if ( mixbuf[0] != NULL ) {
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208 myfree(mixbuf[0]);
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209 // SDL_FreeAudioMem(mixbuf[0]);
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210 mixbuf[0] = NULL;
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211 }
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212
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213 D(bug("Freeing mixbuf[1]...\n"));
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214 if ( mixbuf[1] != NULL ) {
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215 myfree(mixbuf[1]);
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216 // SDL_FreeAudioMem(mixbuf[1]);
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217 mixbuf[1] = NULL;
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218 }
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219
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220 D(bug("Freeing audio_port...\n"));
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221
0
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222 if ( audio_port != NULL ) {
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223 DeleteMsgPort(audio_port);
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224 audio_port = NULL;
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225 }
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226 D(bug("...done!\n"));
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227 }
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228
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229 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec)
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230 {
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231 // int width;
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232
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233 D(bug("AHI opening...\n"));
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234
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235 /* Determine the audio parameters from the AudioSpec */
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236 switch ( spec->format & 0xFF ) {
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237
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238 case 8: { /* Signed 8 bit audio data */
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239 D(bug("Samples a 8 bit...\n"));
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240 spec->format = AUDIO_S8;
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241 this->hidden->bytespersample=1;
21
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242 if(spec->channels<2)
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243 this->hidden->type = AHIST_M8S;
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244 else
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245 this->hidden->type = AHIST_S8S;
0
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246 }
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247 break;
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248
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249 case 16: { /* Signed 16 bit audio data */
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250 D(bug("Samples a 16 bit...\n"));
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251 spec->format = AUDIO_S16MSB;
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252 this->hidden->bytespersample=2;
21
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253 if(spec->channels<2)
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254 this->hidden->type = AHIST_M16S;
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255 else
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diff changeset
256 this->hidden->type = AHIST_S16S;
0
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257 }
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258 break;
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259
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260 default: {
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261 SDL_SetError("Unsupported audio format");
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262 return(-1);
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263 }
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264 }
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265
21
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diff changeset
266 if(spec->channels!=1 && spec->channels!=2)
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
267 {
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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268 D(bug("Wrong channel number!\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
269 SDL_SetError("Channel number non supported");
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diff changeset
270 return -1;
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diff changeset
271 }
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
272
0
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273 D(bug("Before CalculateAudioSpec\n"));
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274 /* Update the fragment size as size in bytes */
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275 SDL_CalculateAudioSpec(spec);
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276
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277 D(bug("Before CreateMsgPort\n"));
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278
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279 if(!(audio_port=CreateMsgPort()))
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diff changeset
280 {
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281 SDL_SetError("Unable to create a MsgPort");
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282 return -1;
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283 }
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284
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285 D(bug("Before CreateIORequest\n"));
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diff changeset
286
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287 if(!(audio_req[0]=(struct AHIRequest *)CreateIORequest(audio_port,sizeof(struct AHIRequest))))
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diff changeset
288 {
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diff changeset
289 SDL_SetError("Unable to create an AHIRequest");
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290 DeleteMsgPort(audio_port);
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diff changeset
291 return -1;
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diff changeset
292 }
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293
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diff changeset
294 audio_req[0]->ahir_Version = 4;
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diff changeset
295
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diff changeset
296 if(OpenDevice(AHINAME,0,(struct IORequest *)audio_req[0],NULL))
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diff changeset
297 {
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diff changeset
298 SDL_SetError("Unable to open AHI device!\n");
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diff changeset
299 DeleteIORequest((struct IORequest *)audio_req[0]);
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diff changeset
300 DeleteMsgPort(audio_port);
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diff changeset
301 return -1;
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parents:
diff changeset
302 }
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diff changeset
303
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diff changeset
304 D(bug("AFTER opendevice\n"));
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diff changeset
305
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
306 /* Set output frequency and size */
0
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diff changeset
307 this->hidden->freq = spec->freq;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
308 this->hidden->size = spec->size;
0
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diff changeset
309
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310 D(bug("Before buffer allocation\n"));
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parents:
diff changeset
311
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parents:
diff changeset
312 /* Allocate mixing buffer */
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diff changeset
313 mixbuf[0] = (Uint8 *)mymalloc(spec->size);
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diff changeset
314 mixbuf[1] = (Uint8 *)mymalloc(spec->size);
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diff changeset
315
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316 D(bug("Before audio_req allocation\n"));
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317
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318 if(!(audio_req[1]=mymalloc(sizeof(struct AHIRequest))))
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319 {
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320 SDL_OutOfMemory();
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321 return(-1);
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322 }
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323
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324 D(bug("Before audio_req memcpy\n"));
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325
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326 memcpy(audio_req[1],audio_req[0],sizeof(struct AHIRequest));
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327
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328 if ( mixbuf[0] == NULL || mixbuf[1] == NULL ) {
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329 SDL_OutOfMemory();
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330 return(-1);
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331 }
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332
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333 D(bug("Before mixbuf memset\n"));
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334
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335 memset(mixbuf[0], spec->silence, spec->size);
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336 memset(mixbuf[1], spec->silence, spec->size);
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337
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338 current_buffer=0;
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339 playing=0;
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340
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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341 D(bug("AHI opened: freq:%ld mixbuf:%lx/%lx buflen:%ld bits:%ld channels:%ld\n",spec->freq,mixbuf[0],mixbuf[1],spec->size,this->hidden->bytespersample*8,spec->channels));
0
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342
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343 /* We're ready to rock and roll. :-) */
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344 return(0);
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345 }