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annotate src/audio/nds/SDL_ndsaudio.c @ 4036:eb60dd682e5e SDL-1.2

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Whoops, reverted changes that shouldn't have been committed with #3197.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 10 Jul 2007 15:04:49 +0000
parents 8582c6a5ca16
children a1b03ba2fcd0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 Lesser General Public
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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.
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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 Lesser 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 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
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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 #include "SDL_config.h"
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23
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24 /* Allow access to a raw mixing buffer */
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25 #include <nds.h>
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26 #include "SDL.h"
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27 #include "SDL_endian.h"
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28 #include "SDL_timer.h"
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29 #include "SDL_audio.h"
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30 #include "../SDL_audiomem.h"
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31 #include "../SDL_audio_c.h"
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32 #include "SDL_ndsaudio.h"
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33 #include "soundcommon.h"
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34
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35
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36 /* Audio driver functions */
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37 static int NDS_OpenAudio(_THIS, SDL_AudioSpec *spec);
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38 static void NDS_WaitAudio(_THIS);
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39 static void NDS_PlayAudio(_THIS);
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40 static Uint8 *NDS_GetAudioBuf(_THIS);
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41 static void NDS_CloseAudio(_THIS);
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42
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43 /* Audio driver bootstrap functions */
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44
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45 u32 framecounter = 0,soundoffset = 0;
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46 static SDL_AudioDevice *sdl_nds_audiodevice;
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47
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48 //void SoundMixCallback(void *stream,u32 size)
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49 //{
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50 // //printf("SoundMixCallback\n");
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51 //
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52 // Uint8 *buffer;
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53 //
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54 // buffer = sdl_nds_audiodevice->hidden->mixbuf;
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55 // memset(buffer, sdl_nds_audiodevice->spec.silence, size);
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56 //
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57 // if (!sdl_nds_audiodevice->paused){
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58 //
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59 //
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60 // //if (sdl_nds_audiodevice->convert.needed) {
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61 // // int silence;
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62 //
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63 // // if (sdl_nds_audiodevice->convert.src_format == AUDIO_U8 ) {
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64 // // silence = 0x80;
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65 // // } else {
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66 // // silence = 0;
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67 // // }
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68 // // memset(sdl_nds_audiodevice->convert.buf, silence, sdl_nds_audiodevice->convert.len);
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69 // // sdl_nds_audiodevice->spec.callback(sdl_nds_audiodevice->spec.userdata,
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70 // // (Uint8 *)sdl_nds_audiodevice->convert.buf,sdl_nds_audiodevice->convert.len);
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71 // // SDL_ConvertAudio(&sdl_nds_audiodevice->convert);
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72 // // memcpy(buffer, sdl_nds_audiodevice->convert.buf, sdl_nds_audiodevice->convert.len_cvt);
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73 // //} else
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74 // {
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75 // sdl_nds_audiodevice->spec.callback(sdl_nds_audiodevice->spec.userdata, buffer, size);
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76 // //memcpy((Sint16 *)stream,buffer, size);
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77 // }
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78 //
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79 // }
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80 //
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81 // if(soundsystem->format == 8)
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82 // {
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83 // int i;
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84 // s32 *buffer32 = (s32 *)buffer;
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85 // s32 *stream32 = (s32 *)stream;
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86 // for(i=0;i<size/4;i++){ *stream32++ = buffer32[i] ^ 0x80808080;}
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87 // //for(i = 0; i < size; i++)
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88 // // ((s8*)stream)[i]=(buffer[i]^0x80);
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89 // }
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90 // else
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91 // {
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92 // int i;
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93 // for(i = 0; i < size; i++){
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94 // //((short*)stream)[i] =(short)buffer[i] << 8; // sound 8bit ---> buffer 16bit
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95 // //if (buffer[i] &0x80)
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96 // //((Sint16*)stream)[i] = 0xff00 | buffer[i];
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97 // ((Sint16*)stream)[i] = (buffer[i] - 128) << 8;
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98 //
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99 // //else
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100 // // ((Sint16*)stream)[i] = buffer[i];
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101 // }
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102 // //register signed char *pSrc =buffer;
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103 // //register short *pDest =stream;
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104 // //int x;
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105 // // for (x=size; x>0; x--)
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106 // // {
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107 // // register short temp = (((short)*pSrc)-128)<<8;
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108 // // pSrc++;
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109 // // *pDest++ = temp;
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110 // // }
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111 //
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112 // //memcpy((Sint16 *)stream,buffer, size);
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113 // }
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114 //}
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115
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116 void SoundMixCallback(void *stream,u32 len)
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117 {
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118 SDL_AudioDevice *audio = (SDL_AudioDevice *)sdl_nds_audiodevice;
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119
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120 /* Silence the buffer, since it's ours */
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121 SDL_memset(stream, audio->spec.silence, len);
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122
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
123 /* Only do soemthing if audio is enabled */
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
124 if ( ! audio->enabled )
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
125 return;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
126
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
127 if ( ! audio->paused ) {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
128 if ( audio->convert.needed ) {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
129 //fprintf(stderr,"converting audio\n");
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
130 SDL_mutexP(audio->mixer_lock);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
131 (*audio->spec.callback)(audio->spec.userdata,
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
132 (Uint8 *)audio->convert.buf,audio->convert.len);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
133 SDL_mutexV(audio->mixer_lock);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
134 SDL_ConvertAudio(&audio->convert);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
135 SDL_memcpy(stream,audio->convert.buf,audio->convert.len_cvt);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
136 } else {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
137 SDL_mutexP(audio->mixer_lock);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
138 (*audio->spec.callback)(audio->spec.userdata,
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
139 (Uint8 *)stream, len);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
140 SDL_mutexV(audio->mixer_lock);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
141 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
142 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
143 return;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
144 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
145 void MixSound(void)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
146 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
147 int remain;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
148
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
149 if(soundsystem->format == 8)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
150 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
151 if((soundsystem->soundcursor + soundsystem->numsamples) > soundsystem->buffersize)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
152 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
153 SoundMixCallback(&soundsystem->mixbuffer[soundsystem->soundcursor],soundsystem->buffersize - soundsystem->soundcursor);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
154 remain = soundsystem->numsamples - (soundsystem->buffersize - soundsystem->soundcursor);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
155 SoundMixCallback(soundsystem->mixbuffer,remain);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
156 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
157 else
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
158 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
159 SoundMixCallback(&soundsystem->mixbuffer[soundsystem->soundcursor],soundsystem->numsamples);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
160 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
161 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
162 else
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
163 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
164 if((soundsystem->soundcursor + soundsystem->numsamples) > (soundsystem->buffersize >> 1))
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
165 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
166 SoundMixCallback(&soundsystem->mixbuffer[soundsystem->soundcursor << 1],(soundsystem->buffersize >> 1) - soundsystem->soundcursor);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
167 remain = soundsystem->numsamples - ((soundsystem->buffersize >> 1) - soundsystem->soundcursor);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
168 SoundMixCallback(soundsystem->mixbuffer,remain);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
169 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
170 else
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
171 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
172 SoundMixCallback(&soundsystem->mixbuffer[soundsystem->soundcursor << 1],soundsystem->numsamples);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
173 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
174 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
175 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
176
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
177 void InterruptHandler(void)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
178 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
179 framecounter++;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
180 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
181 void FiFoHandler(void)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
182 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
183 u32 command;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
184 while ( !(REG_IPC_FIFO_CR & (IPC_FIFO_RECV_EMPTY)) )
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
185 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
186 command = REG_IPC_FIFO_RX;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
187
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
188 switch(command)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
189 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
190 case FIFO_NONE:
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
191 break;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
192 case UPDATEON_ARM9:
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
193 REG_IME = 0;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
194 MixSound();
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
195 REG_IME = 1;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
196 SendCommandToArm7(MIXCOMPLETE_ONARM9);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
197 break;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
198 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
199 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
200 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
201
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
202
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
203
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
204
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
205
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
206 static int Audio_Available(void)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
207 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
208 return(1);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
209 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
210
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
211 static void Audio_DeleteDevice(SDL_AudioDevice *device)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
212 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
213 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
214
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
215 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
216 {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
217
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
218 SDL_AudioDevice *this;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
219
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
220 /* Initialize all variables that we clean on shutdown */
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
221 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
222 if ( this ) {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
223 SDL_memset(this, 0, (sizeof *this));
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
224 this->hidden = (struct SDL_PrivateAudioData *)
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
225 SDL_malloc((sizeof *this->hidden));
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
226 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
227 if ( (this == NULL) || (this->hidden == NULL) ) {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
228 SDL_OutOfMemory();
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
229 if ( this ) {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
230 SDL_free(this);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
231 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
232 return(0);
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
233 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
234 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
235
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
236 /* Set the function pointers */
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
237 this->OpenAudio = NDS_OpenAudio;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
238 this->WaitAudio = NDS_WaitAudio;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
239 this->PlayAudio = NDS_PlayAudio;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
240 this->GetAudioBuf = NDS_GetAudioBuf;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
241 this->CloseAudio = NDS_CloseAudio;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
242
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
243 this->free = Audio_DeleteDevice;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
244 //fprintf(stderr,"Audio_CreateDevice\n");
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245 return this;
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
246 }
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
247
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
248 AudioBootStrap NDSAUD_bootstrap = {
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
249 "nds", "NDS audio",
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
250 Audio_Available, Audio_CreateDevice
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
251 };
8582c6a5ca16 Added initial support for Nintendo DS, based on the work by Troy Davis (GPF)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
252
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253
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254 void static NDS_WaitAudio(_THIS)
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255 {
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256 //printf("NDS_WaitAudio\n");
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257 }
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258
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259 static void NDS_PlayAudio(_THIS)
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260 {
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261 //printf("playing audio\n");
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262 if (this->paused)
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263 return;
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264
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265 }
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266
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267 static Uint8 *NDS_GetAudioBuf(_THIS)
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268 {
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269 return NULL;//(this->hidden->mixbuf);
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270 }
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271
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272 static void NDS_CloseAudio(_THIS)
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273 {
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274 /* if ( this->hidden->mixbuf != NULL ) {
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275 SDL_FreeAudioMem(this->hidden->mixbuf);
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276 this->hidden->mixbuf = NULL;
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277 }*/
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278 }
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279
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280 static int NDS_OpenAudio(_THIS, SDL_AudioSpec *spec)
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281 {
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282 //printf("NDS_OpenAudio\n");
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283 int format = 0;
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284 //switch(spec->format&0xff) {
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285 //case 8: spec->format = AUDIO_S8;format=8; break;
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286 //case 16: spec->format = AUDIO_S16LSB;format=16; break;
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287 //default:
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288 // SDL_SetError("Unsupported audio format");
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289 // return(-1);
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290 //}
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291 switch (spec->format&~0x1000) {
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292 case AUDIO_S8:
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293 /* Signed 8-bit audio supported */
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294 format=8;
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295 break;
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296 case AUDIO_U8:
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297 spec->format ^= 0x80;format=8;
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298 break;
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299 case AUDIO_U16:
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300 /* Unsigned 16-bit audio unsupported, convert to S16 */
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301 spec->format ^=0x8000;format=16;
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302 case AUDIO_S16:
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303 /* Signed 16-bit audio supported */
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304 format=16;
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305 break;
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306 }
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307 /* Update the fragment size as size in bytes */
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308 SDL_CalculateAudioSpec(spec);
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309
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310 /* Allocate mixing buffer */
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311 //this->hidden->mixlen = spec->size;
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312 //this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
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313 //if ( this->hidden->mixbuf == NULL ) {
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314 // SDL_SetError("Out of Memory");
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315 // return(-1);
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316 //}
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317
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318 SDL_NDSAudio_mutex = 0;
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319 sdl_nds_audiodevice=this;
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320
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321 irqInit();
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322 irqSet(IRQ_VBLANK,&InterruptHandler);
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323 irqSet(IRQ_FIFO_NOT_EMPTY,&FiFoHandler);
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324 irqEnable(IRQ_FIFO_NOT_EMPTY);
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325
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326 REG_IPC_FIFO_CR = IPC_FIFO_ENABLE | IPC_FIFO_SEND_CLEAR | IPC_FIFO_RECV_IRQ;
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327
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328
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329
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330 SoundSystemInit(spec->freq,spec->size,0,format);
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331 SoundStartMixer();
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332
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333
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334 return(1);
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335 }