| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 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 |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* Allow access to a raw mixing buffer */ |
| 25 | #include <nds.h> |
| 26 | #include "SDL.h" |
| 27 | #include "SDL_endian.h" |
| 28 | #include "SDL_timer.h" |
| 29 | #include "SDL_audio.h" |
| 30 | #include "../SDL_audiomem.h" |
| 31 | #include "../SDL_audio_c.h" |
| 32 | #include "SDL_ndsaudio.h" |
| 33 | #include "soundcommon.h" |
| 34 | |
| 35 | |
| 36 | /* Audio driver functions */ |
| 37 | static int NDS_OpenAudio(_THIS, SDL_AudioSpec *spec); |
| 38 | static void NDS_WaitAudio(_THIS); |
| 39 | static void NDS_PlayAudio(_THIS); |
| 40 | static Uint8 *NDS_GetAudioBuf(_THIS); |
| 41 | static void NDS_CloseAudio(_THIS); |
| 42 | |
| 43 | /* Audio driver bootstrap functions */ |
| 44 | |
| 45 | u32 framecounter = 0,soundoffset = 0; |
| 46 | static SDL_AudioDevice *sdl_nds_audiodevice; |
| 47 | |
| 48 | //void SoundMixCallback(void *stream,u32 size) |
| 49 | //{ |
| 50 | // //printf("SoundMixCallback\n"); |
| 51 | // |
| 52 | // Uint8 *buffer; |
| 53 | // |
| 54 | // buffer = sdl_nds_audiodevice->hidden->mixbuf; |
| 55 | // memset(buffer, sdl_nds_audiodevice->spec.silence, size); |
| 56 | // |
| 57 | // if (!sdl_nds_audiodevice->paused){ |
| 58 | // |
| 59 | // |
| 60 | // //if (sdl_nds_audiodevice->convert.needed) { |
| 61 | // // int silence; |
| 62 | // |
| 63 | // // if (sdl_nds_audiodevice->convert.src_format == AUDIO_U8 ) { |
| 64 | // // silence = 0x80; |
| 65 | // // } else { |
| 66 | // // silence = 0; |
| 67 | // // } |
| 68 | // // memset(sdl_nds_audiodevice->convert.buf, silence, sdl_nds_audiodevice->convert.len); |
| 69 | // // sdl_nds_audiodevice->spec.callback(sdl_nds_audiodevice->spec.userdata, |
| 70 | // // (Uint8 *)sdl_nds_audiodevice->convert.buf,sdl_nds_audiodevice->convert.len); |
| 71 | // // SDL_ConvertAudio(&sdl_nds_audiodevice->convert); |
| 72 | // // memcpy(buffer, sdl_nds_audiodevice->convert.buf, sdl_nds_audiodevice->convert.len_cvt); |
| 73 | // //} else |
| 74 | // { |
| 75 | // sdl_nds_audiodevice->spec.callback(sdl_nds_audiodevice->spec.userdata, buffer, size); |
| 76 | // //memcpy((Sint16 *)stream,buffer, size); |
| 77 | // } |
| 78 | // |
| 79 | // } |
| 80 | // |
| 81 | // if(soundsystem->format == 8) |
| 82 | // { |
| 83 | // int i; |
| 84 | // s32 *buffer32 = (s32 *)buffer; |
| 85 | // s32 *stream32 = (s32 *)stream; |
| 86 | // for(i=0;i<size/4;i++){ *stream32++ = buffer32[i] ^ 0x80808080;} |
| 87 | // //for(i = 0; i < size; i++) |
| 88 | // // ((s8*)stream)[i]=(buffer[i]^0x80); |
| 89 | // } |
| 90 | // else |
| 91 | // { |
| 92 | // int i; |
| 93 | // for(i = 0; i < size; i++){ |
| 94 | // //((short*)stream)[i] =(short)buffer[i] << 8; // sound 8bit ---> buffer 16bit |
| 95 | // //if (buffer[i] &0x80) |
| 96 | // //((Sint16*)stream)[i] = 0xff00 | buffer[i]; |
| 97 | // ((Sint16*)stream)[i] = (buffer[i] - 128) << 8; |
| 98 | // |
| 99 | // //else |
| 100 | // // ((Sint16*)stream)[i] = buffer[i]; |
| 101 | // } |
| 102 | // //register signed char *pSrc =buffer; |
| 103 | // //register short *pDest =stream; |
| 104 | // //int x; |
| 105 | // // for (x=size; x>0; x--) |
| 106 | // // { |
| 107 | // // register short temp = (((short)*pSrc)-128)<<8; |
| 108 | // // pSrc++; |
| 109 | // // *pDest++ = temp; |
| 110 | // // } |
| 111 | // |
| 112 | // //memcpy((Sint16 *)stream,buffer, size); |
| 113 | // } |
| 114 | //} |
| 115 | |
| 116 | void SoundMixCallback(void *stream,u32 len) |
| 117 | { |
| 118 | SDL_AudioDevice *audio = (SDL_AudioDevice *)sdl_nds_audiodevice; |
| 119 | |
| 120 | /* Silence the buffer, since it's ours */ |
| 121 | SDL_memset(stream, audio->spec.silence, len); |
| 122 | |
| 123 | /* Only do soemthing if audio is enabled */ |
| 124 | if ( ! audio->enabled ) |
| 125 | return; |
| 126 | |
| 127 | if ( ! audio->paused ) { |
| 128 | if ( audio->convert.needed ) { |
| 129 | //fprintf(stderr,"converting audio\n"); |
| 130 | SDL_mutexP(audio->mixer_lock); |
| 131 | (*audio->spec.callback)(audio->spec.userdata, |
| 132 | (Uint8 *)audio->convert.buf,audio->convert.len); |
| 133 | SDL_mutexV(audio->mixer_lock); |
| 134 | SDL_ConvertAudio(&audio->convert); |
| 135 | SDL_memcpy(stream,audio->convert.buf,audio->convert.len_cvt); |
| 136 | } else { |
| 137 | SDL_mutexP(audio->mixer_lock); |
| 138 | (*audio->spec.callback)(audio->spec.userdata, |
| 139 | (Uint8 *)stream, len); |
| 140 | SDL_mutexV(audio->mixer_lock); |
| 141 | } |
| 142 | } |
| 143 | return; |
| 144 | } |
| 145 | void MixSound(void) |
| 146 | { |
| 147 | int remain; |
| 148 | |
| 149 | if(soundsystem->format == 8) |
| 150 | { |
| 151 | if((soundsystem->soundcursor + soundsystem->numsamples) > soundsystem->buffersize) |
| 152 | { |
| 153 | SoundMixCallback(&soundsystem->mixbuffer[soundsystem->soundcursor],soundsystem->buffersize - soundsystem->soundcursor); |
| 154 | remain = soundsystem->numsamples - (soundsystem->buffersize - soundsystem->soundcursor); |
| 155 | SoundMixCallback(soundsystem->mixbuffer,remain); |
| 156 | } |
| 157 | else |
| 158 | { |
| 159 | SoundMixCallback(&soundsystem->mixbuffer[soundsystem->soundcursor],soundsystem->numsamples); |
| 160 | } |
| 161 | } |
| 162 | else |
| 163 | { |
| 164 | if((soundsystem->soundcursor + soundsystem->numsamples) > (soundsystem->buffersize >> 1)) |
| 165 | { |
| 166 | SoundMixCallback(&soundsystem->mixbuffer[soundsystem->soundcursor << 1],(soundsystem->buffersize >> 1) - soundsystem->soundcursor); |
| 167 | remain = soundsystem->numsamples - ((soundsystem->buffersize >> 1) - soundsystem->soundcursor); |
| 168 | SoundMixCallback(soundsystem->mixbuffer,remain); |
| 169 | } |
| 170 | else |
| 171 | { |
| 172 | SoundMixCallback(&soundsystem->mixbuffer[soundsystem->soundcursor << 1],soundsystem->numsamples); |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | void InterruptHandler(void) |
| 178 | { |
| 179 | framecounter++; |
| 180 | } |
| 181 | void FiFoHandler(void) |
| 182 | { |
| 183 | u32 command; |
| 184 | while ( !(REG_IPC_FIFO_CR & (IPC_FIFO_RECV_EMPTY)) ) |
| 185 | { |
| 186 | command = REG_IPC_FIFO_RX; |
| 187 | |
| 188 | switch(command) |
| 189 | { |
| 190 | case FIFO_NONE: |
| 191 | break; |
| 192 | case UPDATEON_ARM9: |
| 193 | REG_IME = 0; |
| 194 | MixSound(); |
| 195 | REG_IME = 1; |
| 196 | SendCommandToArm7(MIXCOMPLETE_ONARM9); |
| 197 | break; |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | |
| 203 | |
| 204 | |
| 205 | |
| 206 | static int Audio_Available(void) |
| 207 | { |
| 208 | return(1); |
| 209 | } |
| 210 | |
| 211 | static void Audio_DeleteDevice(SDL_AudioDevice *device) |
| 212 | { |
| 213 | } |
| 214 | |
| 215 | static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
| 216 | { |
| 217 | |
| 218 | SDL_AudioDevice *this; |
| 219 | |
| 220 | /* Initialize all variables that we clean on shutdown */ |
| 221 | this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); |
| 222 | if ( this ) { |
| 223 | SDL_memset(this, 0, (sizeof *this)); |
| 224 | this->hidden = (struct SDL_PrivateAudioData *) |
| 225 | SDL_malloc((sizeof *this->hidden)); |
| 226 | } |
| 227 | if ( (this == NULL) || (this->hidden == NULL) ) { |
| 228 | SDL_OutOfMemory(); |
| 229 | if ( this ) { |
| 230 | SDL_free(this); |
| 231 | } |
| 232 | return(0); |
| 233 | } |
| 234 | SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 235 | |
| 236 | /* Set the function pointers */ |
| 237 | this->OpenAudio = NDS_OpenAudio; |
| 238 | this->WaitAudio = NDS_WaitAudio; |
| 239 | this->PlayAudio = NDS_PlayAudio; |
| 240 | this->GetAudioBuf = NDS_GetAudioBuf; |
| 241 | this->CloseAudio = NDS_CloseAudio; |
| 242 | |
| 243 | this->free = Audio_DeleteDevice; |
| 244 | //fprintf(stderr,"Audio_CreateDevice\n"); |
| 245 | return this; |
| 246 | } |
| 247 | |
| 248 | AudioBootStrap NDSAUD_bootstrap = { |
| 249 | "nds", "NDS audio", |
| 250 | Audio_Available, Audio_CreateDevice |
| 251 | }; |
| 252 | |
| 253 | |
| 254 | void static NDS_WaitAudio(_THIS) |
| 255 | { |
| 256 | //printf("NDS_WaitAudio\n"); |
| 257 | } |
| 258 | |
| 259 | static void NDS_PlayAudio(_THIS) |
| 260 | { |
| 261 | //printf("playing audio\n"); |
| 262 | if (this->paused) |
| 263 | return; |
| 264 | |
| 265 | } |
| 266 | |
| 267 | static Uint8 *NDS_GetAudioBuf(_THIS) |
| 268 | { |
| 269 | return NULL;//(this->hidden->mixbuf); |
| 270 | } |
| 271 | |
| 272 | static void NDS_CloseAudio(_THIS) |
| 273 | { |
| 274 | /* if ( this->hidden->mixbuf != NULL ) { |
| 275 | SDL_FreeAudioMem(this->hidden->mixbuf); |
| 276 | this->hidden->mixbuf = NULL; |
| 277 | }*/ |
| 278 | } |
| 279 | |
| 280 | static int NDS_OpenAudio(_THIS, SDL_AudioSpec *spec) |
| 281 | { |
| 282 | //printf("NDS_OpenAudio\n"); |
| 283 | int format = 0; |
| 284 | //switch(spec->format&0xff) { |
| 285 | //case 8: spec->format = AUDIO_S8;format=8; break; |
| 286 | //case 16: spec->format = AUDIO_S16LSB;format=16; break; |
| 287 | //default: |
| 288 | // SDL_SetError("Unsupported audio format"); |
| 289 | // return(-1); |
| 290 | //} |
| 291 | switch (spec->format&~0x1000) { |
| 292 | case AUDIO_S8: |
| 293 | /* Signed 8-bit audio supported */ |
| 294 | format=8; |
| 295 | break; |
| 296 | case AUDIO_U8: |
| 297 | spec->format ^= 0x80;format=8; |
| 298 | break; |
| 299 | case AUDIO_U16: |
| 300 | /* Unsigned 16-bit audio unsupported, convert to S16 */ |
| 301 | spec->format ^=0x8000;format=16; |
| 302 | case AUDIO_S16: |
| 303 | /* Signed 16-bit audio supported */ |
| 304 | format=16; |
| 305 | break; |
| 306 | } |
| 307 | /* Update the fragment size as size in bytes */ |
| 308 | SDL_CalculateAudioSpec(spec); |
| 309 | |
| 310 | /* Allocate mixing buffer */ |
| 311 | //this->hidden->mixlen = spec->size; |
| 312 | //this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen); |
| 313 | //if ( this->hidden->mixbuf == NULL ) { |
| 314 | // SDL_SetError("Out of Memory"); |
| 315 | // return(-1); |
| 316 | //} |
| 317 | |
| 318 | SDL_NDSAudio_mutex = 0; |
| 319 | sdl_nds_audiodevice=this; |
| 320 | |
| 321 | irqInit(); |
| 322 | irqSet(IRQ_VBLANK,&InterruptHandler); |
| 323 | irqSet(IRQ_FIFO_NOT_EMPTY,&FiFoHandler); |
| 324 | irqEnable(IRQ_FIFO_NOT_EMPTY); |
| 325 | |
| 326 | REG_IPC_FIFO_CR = IPC_FIFO_ENABLE | IPC_FIFO_SEND_CLEAR | IPC_FIFO_RECV_IRQ; |
| 327 | |
| 328 | |
| 329 | |
| 330 | SoundSystemInit(spec->freq,spec->size,0,format); |
| 331 | SoundStartMixer(); |
| 332 | |
| 333 | |
| 334 | return(1); |
| 335 | } |