Mercurial > sdl-ios-xcode
annotate src/audio/amigaos/SDL_ahiaudio.c @ 1768:814f9f2c7a33
Fixed bug #80
Date: 21 Apr 2003 17:20:20 +0100
From: Alan Swanson <swanson@uklinux.net>
Subject: [SDL] New XFree 4.3 Video Mode Patch
If you look at the unsorted list of modes returned by X, here's mine;
1280 x 1024 @ 85.0 >
1024 x 768 @ 100.3 > USER
800 x 600 @ 125.5 > SET
640 x 480 @ 124.9 >
1280 x 1024 @ 75.0 ]
1280 x 1024 @ 60.0 ]
1280 x 960 @ 85.0 ] X11
1280 x 960 @ 60.0 ] AUTO
1152 x 864 @ 75.0 ]=20
1152 x 768 @ 54.8 ]
960 x 720 @ 120.0 ]
...
640 x 400 @ 85.1 ] 256k
576 x 432 @ 150.0 ] 249k PIXEL
640 x 350 @ 85.1 ] 224k COUNT
576 x 384 @ 109.6 ] 221k
...
The user set modes come first followed by X set modes which are ordered
by decreasing number of pixels and refresh.
The reason why every other library or program not using SDL working is
due to SDL scanning the modes in reverse getting X11 provided modes
modes with the lowest refresh.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 05 May 2006 05:50:26 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb 405a192b68e7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 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 Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
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24 /* Allow access to a raw mixing buffer (for AmigaOS) */ |
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25 |
| 0 | 26 #include "SDL_audio.h" |
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27 #include "../SDL_audio_c.h" |
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28 #include "SDL_ahiaudio.h" |
| 0 | 29 |
| 30 /* Audio driver functions */ | |
| 31 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 32 static void AHI_WaitAudio(_THIS); | |
| 33 static void AHI_PlayAudio(_THIS); | |
| 34 static Uint8 *AHI_GetAudioBuf(_THIS); | |
| 35 static void AHI_CloseAudio(_THIS); | |
| 36 | |
| 37 #ifndef __SASC | |
| 38 #define mymalloc(x) AllocVec(x,MEMF_PUBLIC) | |
| 39 #define myfree FreeVec | |
| 40 #else | |
| 41 #define mymalloc malloc | |
| 42 #define myfree free | |
| 43 #endif | |
| 44 | |
| 45 /* Audio driver bootstrap functions */ | |
| 46 | |
| 47 static int Audio_Available(void) | |
| 48 { | |
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49 int ok=0; |
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50 struct MsgPort *p; |
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51 struct AHIRequest *req; |
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52 |
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53 if(p=CreateMsgPort()) |
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54 { |
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55 if(req=(struct AHIRequest *)CreateIORequest(p,sizeof(struct AHIRequest))) |
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56 { |
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57 req->ahir_Version=4; |
| 0 | 58 |
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59 if(!OpenDevice(AHINAME,0,(struct IORequest *)req,NULL)) |
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60 { |
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61 D(bug("AHI available.\n")); |
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62 ok=1; |
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63 CloseDevice((struct IORequest *)req); |
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64 } |
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65 DeleteIORequest((struct IORequest *)req); |
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66 } |
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67 DeleteMsgPort(p); |
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68 } |
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69 |
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70 D(if(!ok) bug("AHI not available\n")); |
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71 return ok; |
| 0 | 72 } |
| 73 | |
| 74 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 75 { | |
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76 SDL_free(device->hidden); |
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77 SDL_free(device); |
| 0 | 78 } |
| 79 | |
| 80 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 81 { | |
| 82 SDL_AudioDevice *this; | |
| 83 | |
| 84 #ifndef NO_AMIGADEBUG | |
| 85 D(bug("AHI created...\n")); | |
| 86 #endif | |
| 87 | |
| 88 /* Initialize all variables that we clean on shutdown */ | |
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89 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 90 if ( this ) { |
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91 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 92 this->hidden = (struct SDL_PrivateAudioData *) |
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93 SDL_malloc((sizeof *this->hidden)); |
| 0 | 94 } |
| 95 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 96 SDL_OutOfMemory(); | |
| 97 if ( this ) { | |
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98 SDL_free(this); |
| 0 | 99 } |
| 100 return(0); | |
| 101 } | |
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102 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 103 |
| 104 /* Set the function pointers */ | |
| 105 this->OpenAudio = AHI_OpenAudio; | |
| 106 this->WaitAudio = AHI_WaitAudio; | |
| 107 this->PlayAudio = AHI_PlayAudio; | |
| 108 this->GetAudioBuf = AHI_GetAudioBuf; | |
| 109 this->CloseAudio = AHI_CloseAudio; | |
| 110 | |
| 111 this->free = Audio_DeleteDevice; | |
| 112 | |
| 113 return this; | |
| 114 } | |
| 115 | |
| 116 AudioBootStrap AHI_bootstrap = { | |
| 117 "AHI", Audio_Available, Audio_CreateDevice | |
| 118 }; | |
| 119 | |
| 120 | |
| 121 void static AHI_WaitAudio(_THIS) | |
| 122 { | |
| 123 if(!CheckIO((struct IORequest *)audio_req[current_buffer])) | |
| 124 { | |
| 125 WaitIO((struct IORequest *)audio_req[current_buffer]); | |
| 126 // AbortIO((struct IORequest *)audio_req[current_buffer]); | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 static void AHI_PlayAudio(_THIS) | |
| 131 { | |
| 132 if(playing>1) | |
| 133 WaitIO((struct IORequest *)audio_req[current_buffer]); | |
| 134 | |
| 135 /* Write the audio data out */ | |
| 136 audio_req[current_buffer] -> ahir_Std. io_Message.mn_Node.ln_Pri = 60; | |
| 137 audio_req[current_buffer] -> ahir_Std. io_Data = mixbuf[current_buffer]; | |
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138 audio_req[current_buffer] -> ahir_Std. io_Length = this->hidden->size; |
| 0 | 139 audio_req[current_buffer] -> ahir_Std. io_Offset = 0; |
| 140 audio_req[current_buffer] -> ahir_Std . io_Command = CMD_WRITE; | |
| 141 audio_req[current_buffer] -> ahir_Frequency = this->hidden->freq; | |
| 142 audio_req[current_buffer] -> ahir_Volume = 0x10000; | |
| 143 audio_req[current_buffer] -> ahir_Type = this->hidden->type; | |
| 144 audio_req[current_buffer] -> ahir_Position = 0x8000; | |
| 145 audio_req[current_buffer] -> ahir_Link = (playing>0 ? audio_req[current_buffer^1] : NULL); | |
| 146 | |
| 147 SendIO((struct IORequest *)audio_req[current_buffer]); | |
| 148 current_buffer^=1; | |
| 149 | |
| 150 playing++; | |
| 151 } | |
| 152 | |
| 153 static Uint8 *AHI_GetAudioBuf(_THIS) | |
| 154 { | |
| 155 return(mixbuf[current_buffer]); | |
| 156 } | |
| 157 | |
| 158 static void AHI_CloseAudio(_THIS) | |
| 159 { | |
| 160 D(bug("Closing audio...\n")); | |
| 161 | |
| 162 playing=0; | |
| 163 | |
| 164 if(audio_req[0]) | |
| 165 { | |
| 166 if(audio_req[1]) | |
| 167 { | |
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168 D(bug("Break req[1]...\n")); |
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169 |
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170 AbortIO((struct IORequest *)audio_req[1]); |
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171 WaitIO((struct IORequest *)audio_req[1]); |
| 0 | 172 } |
| 173 | |
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174 D(bug("Break req[0]...\n")); |
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175 |
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176 AbortIO((struct IORequest *)audio_req[0]); |
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177 WaitIO((struct IORequest *)audio_req[0]); |
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178 |
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179 if(audio_req[1]) |
| 0 | 180 { |
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181 D(bug("Break AGAIN req[1]...\n")); |
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182 AbortIO((struct IORequest *)audio_req[1]); |
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183 WaitIO((struct IORequest *)audio_req[1]); |
| 0 | 184 } |
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185 // Double abort to be sure to break the dbuffering process. |
| 0 | 186 |
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187 SDL_Delay(200); |
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188 |
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189 D(bug("Reqs breaked, closing device...\n")); |
| 0 | 190 CloseDevice((struct IORequest *)audio_req[0]); |
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191 D(bug("Device closed, freeing memory...\n")); |
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192 myfree(audio_req[1]); |
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193 D(bug("Memory freed, deleting IOReq...\n")); |
| 0 | 194 DeleteIORequest((struct IORequest *)audio_req[0]); |
| 195 audio_req[0]=audio_req[1]=NULL; | |
| 196 } | |
| 197 | |
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198 D(bug("Freeing mixbuf[0]...\n")); |
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199 if ( mixbuf[0] != NULL ) { |
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200 myfree(mixbuf[0]); |
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201 // SDL_FreeAudioMem(mixbuf[0]); |
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202 mixbuf[0] = NULL; |
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203 } |
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204 |
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205 D(bug("Freeing mixbuf[1]...\n")); |
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206 if ( mixbuf[1] != NULL ) { |
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207 myfree(mixbuf[1]); |
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208 // SDL_FreeAudioMem(mixbuf[1]); |
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209 mixbuf[1] = NULL; |
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210 } |
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211 |
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212 D(bug("Freeing audio_port...\n")); |
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213 |
| 0 | 214 if ( audio_port != NULL ) { |
| 215 DeleteMsgPort(audio_port); | |
| 216 audio_port = NULL; | |
| 217 } | |
| 218 D(bug("...done!\n")); | |
| 219 } | |
| 220 | |
| 221 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 222 { | |
| 223 // int width; | |
| 224 | |
| 225 D(bug("AHI opening...\n")); | |
| 226 | |
| 227 /* Determine the audio parameters from the AudioSpec */ | |
| 228 switch ( spec->format & 0xFF ) { | |
| 229 | |
| 230 case 8: { /* Signed 8 bit audio data */ | |
| 231 D(bug("Samples a 8 bit...\n")); | |
| 232 spec->format = AUDIO_S8; | |
| 233 this->hidden->bytespersample=1; | |
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234 if(spec->channels<2) |
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235 this->hidden->type = AHIST_M8S; |
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236 else |
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237 this->hidden->type = AHIST_S8S; |
| 0 | 238 } |
| 239 break; | |
| 240 | |
| 241 case 16: { /* Signed 16 bit audio data */ | |
| 242 D(bug("Samples a 16 bit...\n")); | |
| 243 spec->format = AUDIO_S16MSB; | |
| 244 this->hidden->bytespersample=2; | |
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245 if(spec->channels<2) |
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246 this->hidden->type = AHIST_M16S; |
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247 else |
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248 this->hidden->type = AHIST_S16S; |
| 0 | 249 } |
| 250 break; | |
| 251 | |
| 252 default: { | |
| 253 SDL_SetError("Unsupported audio format"); | |
| 254 return(-1); | |
| 255 } | |
| 256 } | |
| 257 | |
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258 if(spec->channels!=1 && spec->channels!=2) |
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259 { |
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260 D(bug("Wrong channel number!\n")); |
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261 SDL_SetError("Channel number non supported"); |
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262 return -1; |
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263 } |
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264 |
| 0 | 265 D(bug("Before CalculateAudioSpec\n")); |
| 266 /* Update the fragment size as size in bytes */ | |
| 267 SDL_CalculateAudioSpec(spec); | |
| 268 | |
| 269 D(bug("Before CreateMsgPort\n")); | |
| 270 | |
| 271 if(!(audio_port=CreateMsgPort())) | |
| 272 { | |
| 273 SDL_SetError("Unable to create a MsgPort"); | |
| 274 return -1; | |
| 275 } | |
| 276 | |
| 277 D(bug("Before CreateIORequest\n")); | |
| 278 | |
| 279 if(!(audio_req[0]=(struct AHIRequest *)CreateIORequest(audio_port,sizeof(struct AHIRequest)))) | |
| 280 { | |
| 281 SDL_SetError("Unable to create an AHIRequest"); | |
| 282 DeleteMsgPort(audio_port); | |
| 283 return -1; | |
| 284 } | |
| 285 | |
| 286 audio_req[0]->ahir_Version = 4; | |
| 287 | |
| 288 if(OpenDevice(AHINAME,0,(struct IORequest *)audio_req[0],NULL)) | |
| 289 { | |
| 290 SDL_SetError("Unable to open AHI device!\n"); | |
| 291 DeleteIORequest((struct IORequest *)audio_req[0]); | |
| 292 DeleteMsgPort(audio_port); | |
| 293 return -1; | |
| 294 } | |
| 295 | |
| 296 D(bug("AFTER opendevice\n")); | |
| 297 | |
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298 /* Set output frequency and size */ |
| 0 | 299 this->hidden->freq = spec->freq; |
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300 this->hidden->size = spec->size; |
| 0 | 301 |
| 302 D(bug("Before buffer allocation\n")); | |
| 303 | |
| 304 /* Allocate mixing buffer */ | |
| 305 mixbuf[0] = (Uint8 *)mymalloc(spec->size); | |
| 306 mixbuf[1] = (Uint8 *)mymalloc(spec->size); | |
| 307 | |
| 308 D(bug("Before audio_req allocation\n")); | |
| 309 | |
| 310 if(!(audio_req[1]=mymalloc(sizeof(struct AHIRequest)))) | |
| 311 { | |
| 312 SDL_OutOfMemory(); | |
| 313 return(-1); | |
| 314 } | |
| 315 | |
| 316 D(bug("Before audio_req memcpy\n")); | |
| 317 | |
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318 SDL_memcpy(audio_req[1],audio_req[0],sizeof(struct AHIRequest)); |
| 0 | 319 |
| 320 if ( mixbuf[0] == NULL || mixbuf[1] == NULL ) { | |
| 321 SDL_OutOfMemory(); | |
| 322 return(-1); | |
| 323 } | |
| 324 | |
| 325 D(bug("Before mixbuf memset\n")); | |
| 326 | |
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327 SDL_memset(mixbuf[0], spec->silence, spec->size); |
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328 SDL_memset(mixbuf[1], spec->silence, spec->size); |
| 0 | 329 |
| 330 current_buffer=0; | |
| 331 playing=0; | |
| 332 | |
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333 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 | 334 |
| 335 /* We're ready to rock and roll. :-) */ | |
| 336 return(0); | |
| 337 } |