annotate src/audio/amigaos/SDL_ahiaudio.c @ 1336:3692456e7b0f

Use SDL_ prefixed versions of C library functions. FIXME: Change #include <stdlib.h> to #include "SDL_stdlib.h" Change #include <string.h> to #include "SDL_string.h" Make sure nothing else broke because of this...
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Feb 2006 06:59:48 +0000
parents c9b51268668f
children d02b552e5304
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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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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* Allow access to a raw mixing buffer (for AmigaOS) */
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24
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25 #include "SDL_endian.h"
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26 #include "SDL_audio.h"
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27 #include "SDL_audiomem.h"
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28 #include "SDL_audio_c.h"
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29 #include "SDL_ahiaudio.h"
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30
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31 /* Audio driver functions */
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32 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec);
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33 static void AHI_WaitAudio(_THIS);
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34 static void AHI_PlayAudio(_THIS);
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35 static Uint8 *AHI_GetAudioBuf(_THIS);
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36 static void AHI_CloseAudio(_THIS);
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37
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38 #ifndef __SASC
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39 #define mymalloc(x) AllocVec(x,MEMF_PUBLIC)
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40 #define myfree FreeVec
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41 #else
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42 #define mymalloc malloc
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43 #define myfree free
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44 #endif
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45
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46 /* Audio driver bootstrap functions */
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47
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48 static int Audio_Available(void)
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49 {
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50 int ok=0;
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51 struct MsgPort *p;
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52 struct AHIRequest *req;
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53
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54 if(p=CreateMsgPort())
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55 {
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56 if(req=(struct AHIRequest *)CreateIORequest(p,sizeof(struct AHIRequest)))
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57 {
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58 req->ahir_Version=4;
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59
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60 if(!OpenDevice(AHINAME,0,(struct IORequest *)req,NULL))
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61 {
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62 D(bug("AHI available.\n"));
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63 ok=1;
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64 CloseDevice((struct IORequest *)req);
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65 }
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66 DeleteIORequest((struct IORequest *)req);
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67 }
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68 DeleteMsgPort(p);
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69 }
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70
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71 D(if(!ok) bug("AHI not available\n"));
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72 return ok;
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73 }
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74
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75 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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76 {
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77 SDL_free(device->hidden);
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78 SDL_free(device);
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79 }
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80
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81 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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82 {
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83 SDL_AudioDevice *this;
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84
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85 #ifndef NO_AMIGADEBUG
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86 D(bug("AHI created...\n"));
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87 #endif
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88
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89 /* Initialize all variables that we clean on shutdown */
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90 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
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91 if ( this ) {
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92 SDL_memset(this, 0, (sizeof *this));
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93 this->hidden = (struct SDL_PrivateAudioData *)
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94 SDL_malloc((sizeof *this->hidden));
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95 }
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96 if ( (this == NULL) || (this->hidden == NULL) ) {
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97 SDL_OutOfMemory();
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98 if ( this ) {
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99 SDL_free(this);
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100 }
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101 return(0);
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102 }
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103 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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104
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105 /* Set the function pointers */
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106 this->OpenAudio = AHI_OpenAudio;
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107 this->WaitAudio = AHI_WaitAudio;
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108 this->PlayAudio = AHI_PlayAudio;
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109 this->GetAudioBuf = AHI_GetAudioBuf;
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110 this->CloseAudio = AHI_CloseAudio;
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111
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112 this->free = Audio_DeleteDevice;
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113
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114 return this;
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115 }
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116
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117 AudioBootStrap AHI_bootstrap = {
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118 "AHI", Audio_Available, Audio_CreateDevice
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119 };
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120
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121
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122 void static AHI_WaitAudio(_THIS)
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123 {
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124 if(!CheckIO((struct IORequest *)audio_req[current_buffer]))
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125 {
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126 WaitIO((struct IORequest *)audio_req[current_buffer]);
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127 // AbortIO((struct IORequest *)audio_req[current_buffer]);
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128 }
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129 }
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130
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131 static void AHI_PlayAudio(_THIS)
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132 {
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133 if(playing>1)
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134 WaitIO((struct IORequest *)audio_req[current_buffer]);
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135
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136 /* Write the audio data out */
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137 audio_req[current_buffer] -> ahir_Std. io_Message.mn_Node.ln_Pri = 60;
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138 audio_req[current_buffer] -> ahir_Std. io_Data = mixbuf[current_buffer];
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139 audio_req[current_buffer] -> ahir_Std. io_Length = this->hidden->size;
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140 audio_req[current_buffer] -> ahir_Std. io_Offset = 0;
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141 audio_req[current_buffer] -> ahir_Std . io_Command = CMD_WRITE;
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142 audio_req[current_buffer] -> ahir_Frequency = this->hidden->freq;
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143 audio_req[current_buffer] -> ahir_Volume = 0x10000;
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144 audio_req[current_buffer] -> ahir_Type = this->hidden->type;
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145 audio_req[current_buffer] -> ahir_Position = 0x8000;
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146 audio_req[current_buffer] -> ahir_Link = (playing>0 ? audio_req[current_buffer^1] : NULL);
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147
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148 SendIO((struct IORequest *)audio_req[current_buffer]);
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149 current_buffer^=1;
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150
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151 playing++;
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152 }
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153
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154 static Uint8 *AHI_GetAudioBuf(_THIS)
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155 {
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156 return(mixbuf[current_buffer]);
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157 }
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158
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159 static void AHI_CloseAudio(_THIS)
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160 {
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161 D(bug("Closing audio...\n"));
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162
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163 playing=0;
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164
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165 if(audio_req[0])
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166 {
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167 if(audio_req[1])
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168 {
21
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169 D(bug("Break req[1]...\n"));
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170
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171 AbortIO((struct IORequest *)audio_req[1]);
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172 WaitIO((struct IORequest *)audio_req[1]);
0
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173 }
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174
21
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175 D(bug("Break req[0]...\n"));
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176
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177 AbortIO((struct IORequest *)audio_req[0]);
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178 WaitIO((struct IORequest *)audio_req[0]);
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179
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180 if(audio_req[1])
0
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181 {
21
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182 D(bug("Break AGAIN req[1]...\n"));
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183 AbortIO((struct IORequest *)audio_req[1]);
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184 WaitIO((struct IORequest *)audio_req[1]);
0
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185 }
21
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186 // Double abort to be sure to break the dbuffering process.
0
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187
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188 SDL_Delay(200);
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189
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190 D(bug("Reqs breaked, closing device...\n"));
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191 CloseDevice((struct IORequest *)audio_req[0]);
21
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192 D(bug("Device closed, freeing memory...\n"));
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193 myfree(audio_req[1]);
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194 D(bug("Memory freed, deleting IOReq...\n"));
0
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195 DeleteIORequest((struct IORequest *)audio_req[0]);
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196 audio_req[0]=audio_req[1]=NULL;
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197 }
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198
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199 D(bug("Freeing mixbuf[0]...\n"));
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200 if ( mixbuf[0] != NULL ) {
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201 myfree(mixbuf[0]);
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202 // SDL_FreeAudioMem(mixbuf[0]);
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203 mixbuf[0] = NULL;
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204 }
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205
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206 D(bug("Freeing mixbuf[1]...\n"));
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207 if ( mixbuf[1] != NULL ) {
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208 myfree(mixbuf[1]);
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209 // SDL_FreeAudioMem(mixbuf[1]);
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210 mixbuf[1] = NULL;
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211 }
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212
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213 D(bug("Freeing audio_port...\n"));
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214
0
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215 if ( audio_port != NULL ) {
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216 DeleteMsgPort(audio_port);
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217 audio_port = NULL;
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218 }
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219 D(bug("...done!\n"));
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220 }
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221
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222 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec)
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223 {
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224 // int width;
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225
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226 D(bug("AHI opening...\n"));
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227
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228 /* Determine the audio parameters from the AudioSpec */
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229 switch ( spec->format & 0xFF ) {
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230
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231 case 8: { /* Signed 8 bit audio data */
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232 D(bug("Samples a 8 bit...\n"));
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233 spec->format = AUDIO_S8;
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234 this->hidden->bytespersample=1;
21
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235 if(spec->channels<2)
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236 this->hidden->type = AHIST_M8S;
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237 else
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238 this->hidden->type = AHIST_S8S;
0
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239 }
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240 break;
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241
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242 case 16: { /* Signed 16 bit audio data */
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243 D(bug("Samples a 16 bit...\n"));
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244 spec->format = AUDIO_S16MSB;
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245 this->hidden->bytespersample=2;
21
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246 if(spec->channels<2)
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247 this->hidden->type = AHIST_M16S;
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diff changeset
248 else
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diff changeset
249 this->hidden->type = AHIST_S16S;
0
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250 }
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251 break;
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252
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253 default: {
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254 SDL_SetError("Unsupported audio format");
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255 return(-1);
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256 }
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257 }
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258
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
259 if(spec->channels!=1 && spec->channels!=2)
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
260 {
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
261 D(bug("Wrong channel number!\n"));
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
262 SDL_SetError("Channel number non supported");
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
263 return -1;
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
264 }
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
265
0
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266 D(bug("Before CalculateAudioSpec\n"));
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267 /* Update the fragment size as size in bytes */
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268 SDL_CalculateAudioSpec(spec);
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269
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270 D(bug("Before CreateMsgPort\n"));
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271
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272 if(!(audio_port=CreateMsgPort()))
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273 {
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274 SDL_SetError("Unable to create a MsgPort");
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275 return -1;
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276 }
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277
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278 D(bug("Before CreateIORequest\n"));
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diff changeset
279
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280 if(!(audio_req[0]=(struct AHIRequest *)CreateIORequest(audio_port,sizeof(struct AHIRequest))))
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diff changeset
281 {
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282 SDL_SetError("Unable to create an AHIRequest");
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283 DeleteMsgPort(audio_port);
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diff changeset
284 return -1;
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diff changeset
285 }
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diff changeset
286
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diff changeset
287 audio_req[0]->ahir_Version = 4;
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diff changeset
288
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289 if(OpenDevice(AHINAME,0,(struct IORequest *)audio_req[0],NULL))
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diff changeset
290 {
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diff changeset
291 SDL_SetError("Unable to open AHI device!\n");
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diff changeset
292 DeleteIORequest((struct IORequest *)audio_req[0]);
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diff changeset
293 DeleteMsgPort(audio_port);
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diff changeset
294 return -1;
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diff changeset
295 }
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diff changeset
296
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297 D(bug("AFTER opendevice\n"));
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diff changeset
298
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
299 /* Set output frequency and size */
0
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300 this->hidden->freq = spec->freq;
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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diff changeset
301 this->hidden->size = spec->size;
0
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diff changeset
302
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303 D(bug("Before buffer allocation\n"));
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diff changeset
304
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parents:
diff changeset
305 /* Allocate mixing buffer */
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diff changeset
306 mixbuf[0] = (Uint8 *)mymalloc(spec->size);
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diff changeset
307 mixbuf[1] = (Uint8 *)mymalloc(spec->size);
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diff changeset
308
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diff changeset
309 D(bug("Before audio_req allocation\n"));
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310
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311 if(!(audio_req[1]=mymalloc(sizeof(struct AHIRequest))))
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312 {
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313 SDL_OutOfMemory();
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314 return(-1);
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315 }
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316
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317 D(bug("Before audio_req memcpy\n"));
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318
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319 SDL_memcpy(audio_req[1],audio_req[0],sizeof(struct AHIRequest));
0
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320
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321 if ( mixbuf[0] == NULL || mixbuf[1] == NULL ) {
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322 SDL_OutOfMemory();
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323 return(-1);
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324 }
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325
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326 D(bug("Before mixbuf memset\n"));
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327
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328 SDL_memset(mixbuf[0], spec->silence, spec->size);
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329 SDL_memset(mixbuf[1], spec->silence, spec->size);
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330
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331 current_buffer=0;
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332 playing=0;
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333
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334 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));
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335
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336 /* We're ready to rock and roll. :-) */
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337 return(0);
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338 }