Mercurial > sdl-ios-xcode
annotate src/audio/amigaos/SDL_ahiaudio.c @ 1428:5f52867ba65c
Update for Visual C++ 6.0
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 24 Feb 2006 18:24:57 +0000 |
parents | d910939febfa |
children | 782fd950bd46 c121d94672cb 405a192b68e7 |
rev | line source |
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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 |
21
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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; | |
21
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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 } |