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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 the audio stream on BeOS */ |
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25 |
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26 #include <SoundPlayer.h> |
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27 |
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28 #include "../../main/beos/SDL_BeApp.h" |
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29 |
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30 extern "C" { |
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31 |
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32 #include "SDL_audio.h" |
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33 #include "../SDL_audio_c.h" |
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34 #include "../SDL_sysaudio.h" |
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35 #include "../../thread/beos/SDL_systhread_c.h" |
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36 #include "SDL_beaudio.h" |
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37 |
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38 |
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39 /* Audio driver functions */ |
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40 static int BE_OpenAudio(_THIS, SDL_AudioSpec *spec); |
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41 static void BE_WaitAudio(_THIS); |
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42 static void BE_PlayAudio(_THIS); |
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43 static Uint8 *BE_GetAudioBuf(_THIS); |
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44 static void BE_CloseAudio(_THIS); |
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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 return(1); |
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51 } |
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52 |
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53 static void Audio_DeleteDevice(SDL_AudioDevice *device) |
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54 { |
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55 SDL_free(device->hidden); |
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56 SDL_free(device); |
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57 } |
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58 |
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59 static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
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60 { |
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61 SDL_AudioDevice *device; |
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62 |
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63 /* Initialize all variables that we clean on shutdown */ |
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64 device = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
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65 if ( device ) { |
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66 SDL_memset(device, 0, (sizeof *device)); |
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67 device->hidden = (struct SDL_PrivateAudioData *) |
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68 SDL_malloc((sizeof *device->hidden)); |
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69 } |
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70 if ( (device == NULL) || (device->hidden == NULL) ) { |
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71 SDL_OutOfMemory(); |
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72 if ( device ) { |
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73 SDL_free(device); |
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74 } |
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75 return(0); |
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76 } |
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77 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
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78 |
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79 /* Set the function pointers */ |
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80 device->OpenAudio = BE_OpenAudio; |
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81 device->WaitAudio = BE_WaitAudio; |
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82 device->PlayAudio = BE_PlayAudio; |
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83 device->GetAudioBuf = BE_GetAudioBuf; |
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84 device->CloseAudio = BE_CloseAudio; |
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85 |
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86 device->free = Audio_DeleteDevice; |
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87 |
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88 return device; |
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89 } |
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90 |
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91 AudioBootStrap BAUDIO_bootstrap = { |
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92 "baudio", "BeOS BSoundPlayer", |
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93 Audio_Available, Audio_CreateDevice |
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94 }; |
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95 |
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96 /* The BeOS callback for handling the audio buffer */ |
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97 static void FillSound(void *device, void *stream, size_t len, |
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98 const media_raw_audio_format &format) |
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99 { |
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100 SDL_AudioDevice *audio = (SDL_AudioDevice *)device; |
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101 |
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102 /* Silence the buffer, since it's ours */ |
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103 SDL_memset(stream, audio->spec.silence, len); |
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104 |
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105 /* Only do soemthing if audio is enabled */ |
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106 if ( ! audio->enabled ) |
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107 return; |
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108 |
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109 if ( ! audio->paused ) { |
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110 if ( audio->convert.needed ) { |
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111 SDL_mutexP(audio->mixer_lock); |
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112 (*audio->spec.callback)(audio->spec.userdata, |
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113 (Uint8 *)audio->convert.buf,audio->convert.len); |
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114 SDL_mutexV(audio->mixer_lock); |
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115 SDL_ConvertAudio(&audio->convert); |
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116 SDL_memcpy(stream,audio->convert.buf,audio->convert.len_cvt); |
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117 } else { |
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118 SDL_mutexP(audio->mixer_lock); |
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119 (*audio->spec.callback)(audio->spec.userdata, |
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120 (Uint8 *)stream, len); |
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121 SDL_mutexV(audio->mixer_lock); |
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122 } |
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123 } |
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124 return; |
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125 } |
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126 |
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127 /* Dummy functions -- we don't use thread-based audio */ |
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128 void BE_WaitAudio(_THIS) |
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129 { |
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130 return; |
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131 } |
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132 void BE_PlayAudio(_THIS) |
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133 { |
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134 return; |
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135 } |
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136 Uint8 *BE_GetAudioBuf(_THIS) |
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137 { |
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138 return(NULL); |
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139 } |
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140 |
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141 void BE_CloseAudio(_THIS) |
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142 { |
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143 if ( audio_obj ) { |
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144 audio_obj->Stop(); |
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145 delete audio_obj; |
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146 audio_obj = NULL; |
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147 } |
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148 |
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149 /* Quit the Be Application, if there's nothing left to do */ |
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150 SDL_QuitBeApp(); |
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151 } |
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152 |
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153 int BE_OpenAudio(_THIS, SDL_AudioSpec *spec) |
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154 { |
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155 int valid_datatype = 0; |
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156 media_raw_audio_format format; |
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157 Uint16 test_format = SDL_FirstAudioFormat(spec->format); |
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158 |
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159 /* Parse the audio format and fill the Be raw audio format */ |
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160 memset(&format, '\0', sizeof (media_raw_audio_format)); |
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161 format.byte_order = B_MEDIA_LITTLE_ENDIAN; |
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162 format.frame_rate = (float) spec->freq; |
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163 format.channel_count = spec->channels; /* !!! FIXME: support > 2? */ |
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164 while ((!valid_datatype) && (test_format)) { |
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165 valid_datatype = 1; |
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166 spec->format = test_format; |
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167 switch (test_format) { |
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168 case AUDIO_S8: |
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169 format.format = media_raw_audio_format::B_AUDIO_CHAR; |
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170 break; |
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171 |
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172 case AUDIO_U8: |
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173 format.format = media_raw_audio_format::B_AUDIO_UCHAR; |
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174 break; |
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175 |
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176 case AUDIO_S16LSB: |
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177 format.format = media_raw_audio_format::B_AUDIO_SHORT; |
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178 break; |
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179 |
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180 case AUDIO_S16MSB: |
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181 format.format = media_raw_audio_format::B_AUDIO_SHORT; |
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182 format.byte_order = B_MEDIA_BIG_ENDIAN; |
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183 break; |
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184 |
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185 default: |
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186 valid_datatype = 0; |
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187 test_format = SDL_NextAudioFormat(); |
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188 break; |
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189 } |
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190 } |
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191 |
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192 if (!valid_datatype) { /* shouldn't happen, but just in case... */ |
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193 SDL_SetError("Unsupported audio format"); |
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194 return (-1); |
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195 } |
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196 |
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197 /* Initialize the Be Application, if it's not already started */ |
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198 if (SDL_InitBeApp() < 0) { |
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199 return (-1); |
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200 } |
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201 |
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202 format.buffer_size = spec->samples; |
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203 |
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204 /* Calculate the final parameters for this audio specification */ |
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205 SDL_CalculateAudioSpec(spec); |
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206 |
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207 /* Subscribe to the audio stream (creates a new thread) */ |
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208 { sigset_t omask; |
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209 SDL_MaskSignals(&omask); |
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210 audio_obj = new BSoundPlayer(&format, "SDL Audio", FillSound, |
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211 NULL, _this); |
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212 SDL_UnmaskSignals(&omask); |
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213 } |
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214 if ( audio_obj->Start() == B_NO_ERROR ) { |
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215 audio_obj->SetHasData(true); |
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216 } else { |
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217 SDL_SetError("Unable to start Be audio"); |
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218 return(-1); |
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219 } |
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220 |
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221 /* We're running! */ |
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222 return(1); |
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223 } |
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224 |
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225 }; /* Extern C */ |