Mercurial > sdl-ios-xcode
annotate src/audio/windib/SDL_dibaudio.c @ 2288:e9bcf004c324
Merged fix for bug #482 from SDL 1.2 revision 3492.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 29 Dec 2007 20:13:23 +0000 |
parents | 866052b01ee5 |
children | e27bdcc80744 204be4fc2726 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
24 /* Allow access to a raw mixing buffer */ | |
25 | |
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26 #define WIN32_LEAN_AND_MEAN |
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27 #include <windows.h> |
0 | 28 #include <mmsystem.h> |
29 | |
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30 #include "SDL_timer.h" |
0 | 31 #include "SDL_audio.h" |
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32 #include "../SDL_audio_c.h" |
0 | 33 #include "SDL_dibaudio.h" |
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34 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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35 #include "win_ce_semaphore.h" |
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36 #endif |
0 | 37 |
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38 #if defined(_WIN32_WCE) |
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39 #define WINDOWS_OS_NAME "Windows CE/PocketPC" |
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40 #elif defined(WIN64) |
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41 #define WINDOWS_OS_NAME "Win64" |
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42 #else |
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43 #define WINDOWS_OS_NAME "Win32" |
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44 #endif |
0 | 45 |
46 /* The Win32 callback for filling the WAVE device */ | |
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47 static void CALLBACK |
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48 FillSound(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance, |
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49 DWORD dwParam1, DWORD dwParam2) |
0 | 50 { |
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51 SDL_AudioDevice *this = (SDL_AudioDevice *) dwInstance; |
0 | 52 |
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53 /* Only service "buffer done playing" messages */ |
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54 if (uMsg != WOM_DONE) |
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55 return; |
0 | 56 |
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57 /* Signal that we are done playing a buffer */ |
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58 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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59 ReleaseSemaphoreCE(this->hidden->audio_sem, 1, NULL); |
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60 #else |
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61 ReleaseSemaphore(this->hidden->audio_sem, 1, NULL); |
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62 #endif |
0 | 63 } |
64 | |
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65 static void |
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66 SetMMerror(char *function, MMRESULT code) |
0 | 67 { |
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68 size_t len; |
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69 char errbuf[MAXERRORLENGTH]; |
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70 #ifdef _WIN32_WCE |
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71 wchar_t werrbuf[MAXERRORLENGTH]; |
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72 #endif |
0 | 73 |
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74 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function); |
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75 len = SDL_strlen(errbuf); |
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76 |
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77 #ifdef _WIN32_WCE |
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78 /* UNICODE version */ |
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79 waveOutGetErrorText(code, werrbuf, MAXERRORLENGTH - len); |
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80 WideCharToMultiByte(CP_ACP, 0, werrbuf, -1, errbuf + len, |
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81 MAXERRORLENGTH - len, NULL, NULL); |
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82 #else |
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83 waveOutGetErrorText(code, errbuf + len, (UINT) (MAXERRORLENGTH - len)); |
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84 #endif |
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85 |
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86 SDL_SetError("%s", errbuf); |
0 | 87 } |
88 | |
89 /* Set high priority for the audio thread */ | |
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90 static void |
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91 WINWAVEOUT_ThreadInit(_THIS) |
0 | 92 { |
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93 SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); |
0 | 94 } |
95 | |
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96 void |
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97 WINWAVEOUT_WaitDevice(_THIS) |
0 | 98 { |
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99 /* Wait for an audio chunk to finish */ |
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100 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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101 WaitForSemaphoreCE(this->hidden->audio_sem, INFINITE); |
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102 #else |
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103 WaitForSingleObject(this->hidden->audio_sem, INFINITE); |
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104 #endif |
0 | 105 } |
106 | |
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107 Uint8 * |
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108 WINWAVEOUT_GetDeviceBuf(_THIS) |
0 | 109 { |
2060 | 110 return (Uint8 *) (this->hidden->wavebuf[this->hidden->next_buffer]. |
111 lpData); | |
0 | 112 } |
113 | |
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114 void |
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115 WINWAVEOUT_PlayDevice(_THIS) |
0 | 116 { |
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117 /* Queue it up */ |
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118 waveOutWrite(this->hidden->sound, |
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119 &this->hidden->wavebuf[this->hidden->next_buffer], |
2060 | 120 sizeof(this->hidden->wavebuf[0])); |
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121 this->hidden->next_buffer = (this->hidden->next_buffer + 1) % NUM_BUFFERS; |
0 | 122 } |
123 | |
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124 void |
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125 WINWAVEOUT_WaitDone(_THIS) |
0 | 126 { |
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127 int i, left; |
0 | 128 |
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129 do { |
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130 left = NUM_BUFFERS; |
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131 for (i = 0; i < NUM_BUFFERS; ++i) { |
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132 if (this->hidden->wavebuf[i].dwFlags & WHDR_DONE) { |
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133 --left; |
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134 } |
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135 } |
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136 if (left > 0) { |
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137 SDL_Delay(100); |
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138 } |
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139 } |
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140 while (left > 0); |
0 | 141 } |
142 | |
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143 void |
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144 WINWAVEOUT_CloseDevice(_THIS) |
0 | 145 { |
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146 /* Close up audio */ |
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147 if (this->hidden != NULL) { |
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148 int i; |
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149 |
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150 if (this->hidden->audio_sem) { |
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151 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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152 CloseSynchHandle(this->hidden->audio_sem); |
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153 #else |
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154 CloseHandle(this->hidden->audio_sem); |
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155 #endif |
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156 this->hidden->audio_sem = 0; |
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157 } |
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158 |
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159 if (this->hidden->sound) { |
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160 waveOutClose(this->hidden->sound); |
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161 this->hidden->sound = 0; |
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162 } |
0 | 163 |
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164 /* Clean up mixing buffers */ |
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165 for (i = 0; i < NUM_BUFFERS; ++i) { |
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166 if (this->hidden->wavebuf[i].dwUser != 0xFFFF) { |
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167 waveOutUnprepareHeader(this->hidden->sound, |
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168 &this->hidden->wavebuf[i], |
2060 | 169 sizeof(this->hidden->wavebuf[i])); |
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170 this->hidden->wavebuf[i].dwUser = 0xFFFF; |
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171 } |
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172 } |
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173 |
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174 if (this->hidden->mixbuf != NULL) { |
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175 /* Free raw mixing buffer */ |
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176 SDL_free(this->hidden->mixbuf); |
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177 this->hidden->mixbuf = NULL; |
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178 } |
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179 |
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180 SDL_free(this->hidden); |
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181 this->hidden = NULL; |
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182 } |
0 | 183 } |
184 | |
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185 int |
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186 WINWAVEOUT_OpenDevice(_THIS, const char *devname, int iscapture) |
0 | 187 { |
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188 SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format); |
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189 int valid_datatype = 0; |
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190 MMRESULT result; |
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191 WAVEFORMATEX waveformat; |
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192 int i; |
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193 |
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194 /* Initialize all variables that we clean on shutdown */ |
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195 this->hidden = (struct SDL_PrivateAudioData *) |
2060 | 196 SDL_malloc((sizeof *this->hidden)); |
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197 if (this->hidden == NULL) { |
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198 SDL_OutOfMemory(); |
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199 return 0; |
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200 } |
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201 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
0 | 202 |
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203 /* Initialize the wavebuf structures for closing */ |
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204 for (i = 0; i < NUM_BUFFERS; ++i) |
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205 this->hidden->wavebuf[i].dwUser = 0xFFFF; |
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206 |
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207 while ((!valid_datatype) && (test_format)) { |
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208 valid_datatype = 1; |
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209 this->spec.format = test_format; |
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210 switch (test_format) { |
2060 | 211 case AUDIO_U8: |
212 case AUDIO_S16: | |
213 case AUDIO_S32: | |
214 break; /* valid. */ | |
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215 |
2060 | 216 default: |
217 valid_datatype = 0; | |
218 test_format = SDL_NextAudioFormat(); | |
219 break; | |
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220 } |
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221 } |
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222 |
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223 if (!valid_datatype) { |
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224 WINWAVEOUT_CloseDevice(this); |
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225 SDL_SetError("Unsupported audio format"); |
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226 return 0; |
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227 } |
0 | 228 |
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229 /* Set basic WAVE format parameters */ |
2060 | 230 SDL_memset(&waveformat, '\0', sizeof(waveformat)); |
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231 waveformat.wFormatTag = WAVE_FORMAT_PCM; |
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232 waveformat.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format); |
0 | 233 |
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234 if (this->spec.channels > 2) |
2060 | 235 this->spec.channels = 2; /* !!! FIXME: is this right? */ |
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236 |
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237 waveformat.nChannels = this->spec.channels; |
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238 waveformat.nSamplesPerSec = this->spec.freq; |
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239 waveformat.nBlockAlign = |
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240 waveformat.nChannels * (waveformat.wBitsPerSample / 8); |
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241 waveformat.nAvgBytesPerSec = |
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242 waveformat.nSamplesPerSec * waveformat.nBlockAlign; |
0 | 243 |
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244 /* Check the buffer size -- minimum of 1/4 second (word aligned) */ |
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245 if (this->spec.samples < (this->spec.freq / 4)) |
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246 this->spec.samples = ((this->spec.freq / 4) + 3) & ~3; |
0 | 247 |
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248 /* Update the fragment size as size in bytes */ |
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249 SDL_CalculateAudioSpec(&this->spec); |
0 | 250 |
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251 /* Open the audio device */ |
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252 result = waveOutOpen(&this->hidden->sound, WAVE_MAPPER, &waveformat, |
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253 (DWORD_PTR) FillSound, (DWORD_PTR) this, |
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254 CALLBACK_FUNCTION); |
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255 if (result != MMSYSERR_NOERROR) { |
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256 WINWAVEOUT_CloseDevice(this); |
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257 SetMMerror("waveOutOpen()", result); |
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258 return 0; |
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259 } |
0 | 260 #ifdef SOUND_DEBUG |
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261 /* Check the sound device we retrieved */ |
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262 { |
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263 WAVEOUTCAPS caps; |
0 | 264 |
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265 result = waveOutGetDevCaps((UINT) this->hidden->sound, |
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266 &caps, sizeof(caps)); |
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267 if (result != MMSYSERR_NOERROR) { |
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268 WINWAVEOUT_CloseDevice(this); |
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269 SetMMerror("waveOutGetDevCaps()", result); |
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270 return 0; |
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271 } |
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272 printf("Audio device: %s\n", caps.szPname); |
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273 } |
0 | 274 #endif |
275 | |
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276 /* Create the audio buffer semaphore */ |
2060 | 277 this->hidden->audio_sem = |
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278 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
2060 | 279 CreateSemaphoreCE(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL); |
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280 #else |
2060 | 281 CreateSemaphore(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL); |
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282 #endif |
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283 if (this->hidden->audio_sem == NULL) { |
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284 WINWAVEOUT_CloseDevice(this); |
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285 SDL_SetError("Couldn't create semaphore"); |
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286 return 0; |
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287 } |
0 | 288 |
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289 /* Create the sound buffers */ |
2060 | 290 this->hidden->mixbuf = |
291 (Uint8 *) SDL_malloc(NUM_BUFFERS * this->spec.size); | |
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292 if (this->hidden->mixbuf == NULL) { |
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293 WINWAVEOUT_CloseDevice(this); |
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294 SDL_OutOfMemory(); |
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295 return 0; |
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296 } |
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297 for (i = 0; i < NUM_BUFFERS; ++i) { |
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298 SDL_memset(&this->hidden->wavebuf[i], '\0', |
2060 | 299 sizeof(this->hidden->wavebuf[i])); |
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300 this->hidden->wavebuf[i].dwBufferLength = this->spec.size; |
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301 this->hidden->wavebuf[i].dwFlags = WHDR_DONE; |
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302 this->hidden->wavebuf[i].lpData = |
2060 | 303 (LPSTR) & this->hidden->mixbuf[i * this->spec.size]; |
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304 result = waveOutPrepareHeader(this->hidden->sound, |
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305 &this->hidden->wavebuf[i], |
2060 | 306 sizeof(this->hidden->wavebuf[i])); |
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307 if (result != MMSYSERR_NOERROR) { |
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308 WINWAVEOUT_CloseDevice(this); |
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309 SetMMerror("waveOutPrepareHeader()", result); |
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310 return 0; |
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311 } |
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312 } |
0 | 313 |
2060 | 314 return 1; /* Ready to go! */ |
0 | 315 } |
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316 |
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317 |
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318 static int |
2060 | 319 WINWAVEOUT_Init(SDL_AudioDriverImpl * impl) |
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320 { |
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321 /* Set the function pointers */ |
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322 impl->OpenDevice = WINWAVEOUT_OpenDevice; |
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323 impl->ThreadInit = WINWAVEOUT_ThreadInit; |
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324 impl->PlayDevice = WINWAVEOUT_PlayDevice; |
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325 impl->WaitDevice = WINWAVEOUT_WaitDevice; |
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326 impl->WaitDone = WINWAVEOUT_WaitDone; |
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327 impl->GetDeviceBuf = WINWAVEOUT_GetDeviceBuf; |
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328 impl->CloseDevice = WINWAVEOUT_CloseDevice; |
2060 | 329 impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: Is this true? */ |
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330 |
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331 return 1; |
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332 } |
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333 |
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334 AudioBootStrap WINWAVEOUT_bootstrap = { |
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335 "waveout", WINDOWS_OS_NAME " WaveOut", WINWAVEOUT_Init, 0 |
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336 }; |
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337 |
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338 /* vi: set ts=4 sw=4 expandtab: */ |