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annotate src/audio/windx5/SDL_dx5audio.c @ 1668:4da1ee79c9af SDL-1.3

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more tweaking indent options
author Sam Lantinga <slouken@libsdl.org>
date Mon, 29 May 2006 04:04:35 +0000
parents 782fd950bd46
children 442248d4e738
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
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26 #include "SDL_timer.h"
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27 #include "SDL_audio.h"
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28 #include "../SDL_audio_c.h"
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29 #include "SDL_dx5audio.h"
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30
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31 /* Define this if you want to use DirectX 6 DirectSoundNotify interface */
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32 //#define USE_POSITION_NOTIFY
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33
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34 /* DirectX function pointers for audio */
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35 HRESULT(WINAPI * DSoundCreate) (LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
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36
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37 /* Audio driver functions */
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38 static int DX5_OpenAudio(_THIS, SDL_AudioSpec * spec);
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39 static void DX5_ThreadInit(_THIS);
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40 static void DX5_WaitAudio_BusyWait(_THIS);
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41 #ifdef USE_POSITION_NOTIFY
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42 static void DX6_WaitAudio_EventWait(_THIS);
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43 #endif
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44 static void DX5_PlayAudio(_THIS);
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45 static Uint8 *DX5_GetAudioBuf(_THIS);
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46 static void DX5_WaitDone(_THIS);
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47 static void DX5_CloseAudio(_THIS);
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48
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49 /* Audio driver bootstrap functions */
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50
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51 static int
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52 Audio_Available(void)
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53 {
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54 HINSTANCE DSoundDLL;
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55 int dsound_ok;
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56
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57 /* Version check DSOUND.DLL (Is DirectX okay?) */
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58 dsound_ok = 0;
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59 DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL"));
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60 if (DSoundDLL != NULL) {
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61 /* We just use basic DirectSound, we're okay */
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62 /* Yay! */
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63 /* Unfortunately, the sound drivers on NT have
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64 higher latencies than the audio buffers used
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65 by many SDL applications, so there are gaps
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66 in the audio - it sounds terrible. Punt for now.
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67 */
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68 OSVERSIONINFO ver;
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69 ver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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70 GetVersionEx(&ver);
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71 switch (ver.dwPlatformId) {
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72 case VER_PLATFORM_WIN32_NT:
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73 if (ver.dwMajorVersion > 4) {
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74 /* Win2K */
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75 dsound_ok = 1;
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76 } else {
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77 /* WinNT */
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78 dsound_ok = 0;
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79 }
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80 break;
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81 default:
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82 /* Win95 or Win98 */
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83 dsound_ok = 1;
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84 break;
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85 }
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86 /* Now check for DirectX 5 or better - otherwise
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87 * we will fail later in DX5_OpenAudio without a chance
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88 * to fall back to the DIB driver. */
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89 if (dsound_ok) {
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90 /* DirectSoundCaptureCreate was added in DX5 */
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91 if (!GetProcAddress(DSoundDLL, TEXT("DirectSoundCaptureCreate")))
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92 dsound_ok = 0;
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93
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94 }
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95 /* Clean up.. */
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96 FreeLibrary(DSoundDLL);
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97 }
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98 return (dsound_ok);
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99 }
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100
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101 /* Functions for loading the DirectX functions dynamically */
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102 static HINSTANCE DSoundDLL = NULL;
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103
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104 static void
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105 DX5_Unload(void)
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106 {
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107 if (DSoundDLL != NULL) {
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108 FreeLibrary(DSoundDLL);
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109 DSoundCreate = NULL;
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110 DSoundDLL = NULL;
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111 }
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112 }
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113 static int
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114 DX5_Load(void)
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115 {
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116 int status;
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117
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118 DX5_Unload();
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119 DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL"));
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120 if (DSoundDLL != NULL) {
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121 DSoundCreate = (void *) GetProcAddress(DSoundDLL,
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122 TEXT("DirectSoundCreate"));
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123 }
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124 if (DSoundDLL && DSoundCreate) {
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125 status = 0;
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126 } else {
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127 DX5_Unload();
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128 status = -1;
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129 }
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130 return status;
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131 }
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132
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133 static void
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134 Audio_DeleteDevice(SDL_AudioDevice * device)
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135 {
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136 DX5_Unload();
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137 SDL_free(device->hidden);
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138 SDL_free(device);
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139 }
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140
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141 static SDL_AudioDevice *
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142 Audio_CreateDevice(int devindex)
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143 {
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144 SDL_AudioDevice *this;
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145
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146 /* Load DirectX */
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147 if (DX5_Load() < 0) {
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148 return (NULL);
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149 }
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150
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151 /* Initialize all variables that we clean on shutdown */
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152 this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice));
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153 if (this) {
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154 SDL_memset(this, 0, (sizeof *this));
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155 this->hidden = (struct SDL_PrivateAudioData *)
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156 SDL_malloc((sizeof *this->hidden));
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157 }
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158 if ((this == NULL) || (this->hidden == NULL)) {
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159 SDL_OutOfMemory();
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160 if (this) {
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161 SDL_free(this);
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162 }
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163 return (0);
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164 }
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165 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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166
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167 /* Set the function pointers */
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168 this->OpenAudio = DX5_OpenAudio;
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169 this->ThreadInit = DX5_ThreadInit;
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170 this->WaitAudio = DX5_WaitAudio_BusyWait;
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171 this->PlayAudio = DX5_PlayAudio;
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172 this->GetAudioBuf = DX5_GetAudioBuf;
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173 this->WaitDone = DX5_WaitDone;
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174 this->CloseAudio = DX5_CloseAudio;
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175
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176 this->free = Audio_DeleteDevice;
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177
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178 return this;
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179 }
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180
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181 AudioBootStrap DSOUND_bootstrap = {
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182 "dsound", "Win95/98/2000 DirectSound",
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183 Audio_Available, Audio_CreateDevice
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184 };
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185
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186 static void
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187 SetDSerror(const char *function, int code)
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188 {
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189 static const char *error;
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190 static char errbuf[1024];
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191
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192 errbuf[0] = 0;
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193 switch (code) {
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194 case E_NOINTERFACE:
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195 error =
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196 "Unsupported interface\n-- Is DirectX 5.0 or later installed?";
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197 break;
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198 case DSERR_ALLOCATED:
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199 error = "Audio device in use";
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200 break;
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201 case DSERR_BADFORMAT:
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202 error = "Unsupported audio format";
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203 break;
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204 case DSERR_BUFFERLOST:
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205 error = "Mixing buffer was lost";
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206 break;
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207 case DSERR_CONTROLUNAVAIL:
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208 error = "Control requested is not available";
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209 break;
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210 case DSERR_INVALIDCALL:
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211 error = "Invalid call for the current state";
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212 break;
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213 case DSERR_INVALIDPARAM:
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214 error = "Invalid parameter";
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215 break;
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216 case DSERR_NODRIVER:
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217 error = "No audio device found";
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218 break;
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219 case DSERR_OUTOFMEMORY:
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220 error = "Out of memory";
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221 break;
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222 case DSERR_PRIOLEVELNEEDED:
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223 error = "Caller doesn't have priority";
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224 break;
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225 case DSERR_UNSUPPORTED:
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226 error = "Function not supported";
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227 break;
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228 default:
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229 SDL_snprintf(errbuf, SDL_arraysize(errbuf),
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230 "%s: Unknown DirectSound error: 0x%x", function, code);
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231 break;
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232 }
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233 if (!errbuf[0]) {
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234 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function,
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235 error);
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236 }
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237 SDL_SetError("%s", errbuf);
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238 return;
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239 }
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240
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241 /* DirectSound needs to be associated with a window */
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242 static HWND mainwin = NULL;
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243 /* */
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244 void
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245 DX5_SoundFocus(HWND hwnd)
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246 {
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247 mainwin = hwnd;
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248 }
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249
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250 static void
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251 DX5_ThreadInit(_THIS)
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252 {
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253 SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
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254 }
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255
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256 static void
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257 DX5_WaitAudio_BusyWait(_THIS)
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258 {
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259 DWORD status;
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260 DWORD cursor, junk;
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261 HRESULT result;
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262
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263 /* Semi-busy wait, since we have no way of getting play notification
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264 on a primary mixing buffer located in hardware (DirectX 5.0)
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265 */
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266 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &cursor, &junk);
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267 if (result != DS_OK) {
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268 if (result == DSERR_BUFFERLOST) {
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269 IDirectSoundBuffer_Restore(mixbuf);
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270 }
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271 #ifdef DEBUG_SOUND
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272 SetDSerror("DirectSound GetCurrentPosition", result);
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273 #endif
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274 return;
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275 }
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276 cursor /= mixlen;
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277
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278 while (cursor == playing) {
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279 /* FIXME: find out how much time is left and sleep that long */
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280 SDL_Delay(10);
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281
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282 /* Try to restore a lost sound buffer */
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283 IDirectSoundBuffer_GetStatus(mixbuf, &status);
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284 if ((status & DSBSTATUS_BUFFERLOST)) {
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285 IDirectSoundBuffer_Restore(mixbuf);
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286 IDirectSoundBuffer_GetStatus(mixbuf, &status);
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287 if ((status & DSBSTATUS_BUFFERLOST)) {
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288 break;
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289 }
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290 }
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291 if (!(status & DSBSTATUS_PLAYING)) {
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292 result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING);
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293 if (result == DS_OK) {
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294 continue;
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295 }
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296 #ifdef DEBUG_SOUND
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297 SetDSerror("DirectSound Play", result);
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298 #endif
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299 return;
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300 }
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301
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302 /* Find out where we are playing */
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303 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf,
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304 &cursor, &junk);
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305 if (result != DS_OK) {
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306 SetDSerror("DirectSound GetCurrentPosition", result);
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307 return;
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308 }
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309 cursor /= mixlen;
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310 }
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311 }
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312
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313 #ifdef USE_POSITION_NOTIFY
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314 static void
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315 DX6_WaitAudio_EventWait(_THIS)
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316 {
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317 DWORD status;
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318 HRESULT result;
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319
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320 /* Try to restore a lost sound buffer */
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321 IDirectSoundBuffer_GetStatus(mixbuf, &status);
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322 if ((status & DSBSTATUS_BUFFERLOST)) {
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323 IDirectSoundBuffer_Restore(mixbuf);
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324 IDirectSoundBuffer_GetStatus(mixbuf, &status);
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325 if ((status & DSBSTATUS_BUFFERLOST)) {
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326 return;
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327 }
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328 }
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329 if (!(status & DSBSTATUS_PLAYING)) {
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330 result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING);
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331 if (result != DS_OK) {
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332 #ifdef DEBUG_SOUND
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333 SetDSerror("DirectSound Play", result);
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334 #endif
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335 return;
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336 }
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337 }
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338 WaitForSingleObject(audio_event, INFINITE);
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339 }
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340 #endif /* USE_POSITION_NOTIFY */
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341
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342 static void
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343 DX5_PlayAudio(_THIS)
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344 {
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345 /* Unlock the buffer, allowing it to play */
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346 if (locked_buf) {
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347 IDirectSoundBuffer_Unlock(mixbuf, locked_buf, mixlen, NULL, 0);
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348 }
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349
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350 }
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351
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352 static Uint8 *
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353 DX5_GetAudioBuf(_THIS)
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354 {
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355 DWORD cursor, junk;
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356 HRESULT result;
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357 DWORD rawlen;
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358
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359 /* Figure out which blocks to fill next */
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360 locked_buf = NULL;
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361 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &cursor, &junk);
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362 if (result == DSERR_BUFFERLOST) {
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363 IDirectSoundBuffer_Restore(mixbuf);
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364 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf,
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365 &cursor, &junk);
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366 }
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367 if (result != DS_OK) {
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368 SetDSerror("DirectSound GetCurrentPosition", result);
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369 return (NULL);
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370 }
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371 cursor /= mixlen;
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372 playing = cursor;
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373 cursor = (cursor + 1) % NUM_BUFFERS;
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374 cursor *= mixlen;
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375
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376 /* Lock the audio buffer */
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377 result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen,
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378 (LPVOID *) & locked_buf, &rawlen, NULL,
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379 &junk, 0);
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380 if (result == DSERR_BUFFERLOST) {
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381 IDirectSoundBuffer_Restore(mixbuf);
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382 result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen,
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383 (LPVOID *) & locked_buf, &rawlen,
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384 NULL, &junk, 0);
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385 }
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386 if (result != DS_OK) {
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387 SetDSerror("DirectSound Lock", result);
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388 return (NULL);
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389 }
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390 return (locked_buf);
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391 }
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392
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393 static void
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394 DX5_WaitDone(_THIS)
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395 {
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396 Uint8 *stream;
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397
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398 /* Wait for the playing chunk to finish */
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399 stream = this->GetAudioBuf(this);
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400 if (stream != NULL) {
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401 SDL_memset(stream, silence, mixlen);
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402 this->PlayAudio(this);
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403 }
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404 this->WaitAudio(this);
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405
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406 /* Stop the looping sound buffer */
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407 IDirectSoundBuffer_Stop(mixbuf);
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408 }
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409
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diff changeset
410 static void
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411 DX5_CloseAudio(_THIS)
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412 {
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413 if (sound != NULL) {
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414 if (mixbuf != NULL) {
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415 /* Clean up the audio buffer */
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416 IDirectSoundBuffer_Release(mixbuf);
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417 mixbuf = NULL;
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418 }
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419 if (audio_event != NULL) {
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420 CloseHandle(audio_event);
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421 audio_event = NULL;
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422 }
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423 IDirectSound_Release(sound);
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424 sound = NULL;
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425 }
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426 }
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427
469
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parents: 453
diff changeset
428 #ifdef USE_PRIMARY_BUFFER
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429 /* This function tries to create a primary audio buffer, and returns the
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430 number of audio chunks available in the created buffer.
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431 */
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432 static int
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433 CreatePrimary(LPDIRECTSOUND sndObj, HWND focus,
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434 LPDIRECTSOUNDBUFFER * sndbuf, WAVEFORMATEX * wavefmt,
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435 Uint32 chunksize)
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436 {
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437 HRESULT result;
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438 DSBUFFERDESC format;
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439 DSBCAPS caps;
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440 int numchunks;
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441
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442 /* Try to set primary mixing privileges */
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443 result = IDirectSound_SetCooperativeLevel(sndObj, focus,
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diff changeset
444 DSSCL_WRITEPRIMARY);
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445 if (result != DS_OK) {
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446 #ifdef DEBUG_SOUND
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447 SetDSerror("DirectSound SetCooperativeLevel", result);
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448 #endif
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449 return (-1);
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450 }
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451
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452 /* Try to create the primary buffer */
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453 SDL_memset(&format, 0, sizeof(format));
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454 format.dwSize = sizeof(format);
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455 format.dwFlags = (DSBCAPS_PRIMARYBUFFER | DSBCAPS_GETCURRENTPOSITION2);
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456 format.dwFlags |= DSBCAPS_STICKYFOCUS;
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457 #ifdef USE_POSITION_NOTIFY
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458 format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY;
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459 #endif
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460 result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
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461 if (result != DS_OK) {
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462 #ifdef DEBUG_SOUND
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463 SetDSerror("DirectSound CreateSoundBuffer", result);
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diff changeset
464 #endif
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465 return (-1);
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466 }
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467
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468 /* Check the size of the fragment buffer */
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469 SDL_memset(&caps, 0, sizeof(caps));
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470 caps.dwSize = sizeof(caps);
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471 result = IDirectSoundBuffer_GetCaps(*sndbuf, &caps);
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472 if (result != DS_OK) {
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473 #ifdef DEBUG_SOUND
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474 SetDSerror("DirectSound GetCaps", result);
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475 #endif
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476 IDirectSoundBuffer_Release(*sndbuf);
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477 return (-1);
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478 }
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diff changeset
479 if ((chunksize > caps.dwBufferBytes) ||
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
480 ((caps.dwBufferBytes % chunksize) != 0)) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
481 /* The primary buffer size is not a multiple of 'chunksize'
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
482 -- this hopefully doesn't happen when 'chunksize' is a
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
483 power of 2.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
484 */
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485 IDirectSoundBuffer_Release(*sndbuf);
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486 SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
487 ("Primary buffer size is: %d, cannot break it into chunks of %d bytes\n",
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
488 caps.dwBufferBytes, chunksize);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
489 return (-1);
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diff changeset
490 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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491 numchunks = (caps.dwBufferBytes / chunksize);
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diff changeset
492
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diff changeset
493 /* Set the primary audio format */
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494 result = IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt);
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diff changeset
495 if (result != DS_OK) {
0
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diff changeset
496 #ifdef DEBUG_SOUND
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497 SetDSerror("DirectSound SetFormat", result);
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diff changeset
498 #endif
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499 IDirectSoundBuffer_Release(*sndbuf);
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diff changeset
500 return (-1);
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diff changeset
501 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
502 return (numchunks);
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diff changeset
503 }
469
a1284fd544aa Removed unused function
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parents: 453
diff changeset
504 #endif /* USE_PRIMARY_BUFFER */
0
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diff changeset
505
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diff changeset
506 /* This function tries to create a secondary audio buffer, and returns the
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parents:
diff changeset
507 number of audio chunks available in the created buffer.
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diff changeset
508 */
1662
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diff changeset
509 static int
1668
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diff changeset
510 CreateSecondary(LPDIRECTSOUND sndObj, HWND focus,
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diff changeset
511 LPDIRECTSOUNDBUFFER * sndbuf, WAVEFORMATEX * wavefmt,
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diff changeset
512 Uint32 chunksize)
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diff changeset
513 {
1662
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diff changeset
514 const int numchunks = 2;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
515 HRESULT result;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
516 DSBUFFERDESC format;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
517 LPVOID pvAudioPtr1, pvAudioPtr2;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
518 DWORD dwAudioBytes1, dwAudioBytes2;
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diff changeset
519
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782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
520 /* Try to set primary mixing privileges */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
521 if (focus) {
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diff changeset
522 result = IDirectSound_SetCooperativeLevel(sndObj,
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diff changeset
523 focus, DSSCL_PRIORITY);
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diff changeset
524 } else {
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diff changeset
525 result = IDirectSound_SetCooperativeLevel(sndObj,
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diff changeset
526 GetDesktopWindow(),
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diff changeset
527 DSSCL_NORMAL);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
528 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
529 if (result != DS_OK) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 #ifdef DEBUG_SOUND
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
531 SetDSerror("DirectSound SetCooperativeLevel", result);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 #endif
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
533 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
534 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
535
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
536 /* Try to create the secondary buffer */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
537 SDL_memset(&format, 0, sizeof(format));
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
538 format.dwSize = sizeof(format);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
539 format.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
540 #ifdef USE_POSITION_NOTIFY
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
541 format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 #endif
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
543 if (!focus) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
544 format.dwFlags |= DSBCAPS_GLOBALFOCUS;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
545 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
546 format.dwFlags |= DSBCAPS_STICKYFOCUS;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
547 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
548 format.dwBufferBytes = numchunks * chunksize;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
549 if ((format.dwBufferBytes < DSBSIZE_MIN) ||
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
550 (format.dwBufferBytes > DSBSIZE_MAX)) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
551 SDL_SetError("Sound buffer size must be between %d and %d",
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
552 DSBSIZE_MIN / numchunks, DSBSIZE_MAX / numchunks);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
553 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
554 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
555 format.dwReserved = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
556 format.lpwfxFormat = wavefmt;
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
557 result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
558 if (result != DS_OK) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
559 SetDSerror("DirectSound CreateSoundBuffer", result);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
560 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
561 }
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
562 IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
564 /* Silence the initial audio buffer */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
565 result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
566 (LPVOID *) & pvAudioPtr1,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
567 &dwAudioBytes1,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
568 (LPVOID *) & pvAudioPtr2,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
569 &dwAudioBytes2, DSBLOCK_ENTIREBUFFER);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
570 if (result == DS_OK) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
571 if (wavefmt->wBitsPerSample == 8) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
572 SDL_memset(pvAudioPtr1, 0x80, dwAudioBytes1);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
573 } else {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
574 SDL_memset(pvAudioPtr1, 0x00, dwAudioBytes1);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
575 }
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
576 IDirectSoundBuffer_Unlock(*sndbuf,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
577 (LPVOID) pvAudioPtr1, dwAudioBytes1,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
578 (LPVOID) pvAudioPtr2, dwAudioBytes2);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
579 }
118
7c47e511459d Fix noise when starting audio under DX5 (thanks Jesse!)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
580
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
581 /* We're ready to go */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
582 return (numchunks);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
583 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
584
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
585 /* This function tries to set position notify events on the mixing buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
586 #ifdef USE_POSITION_NOTIFY
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
587 static int
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
588 CreateAudioEvent(_THIS)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
589 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
590 LPDIRECTSOUNDNOTIFY notify;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
591 DSBPOSITIONNOTIFY *notify_positions;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
592 int i, retval;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
593 HRESULT result;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
594
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
595 /* Default to fail on exit */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
596 retval = -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
597 notify = NULL;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
598
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
599 /* Query for the interface */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
600 result = IDirectSoundBuffer_QueryInterface(mixbuf,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
601 &IID_IDirectSoundNotify,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
602 (void *) &notify);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
603 if (result != DS_OK) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
604 goto done;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
605 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
606
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
607 /* Allocate the notify structures */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
608 notify_positions = (DSBPOSITIONNOTIFY *) SDL_malloc(NUM_BUFFERS *
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
609 sizeof
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
610 (*notify_positions));
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
611 if (notify_positions == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
612 goto done;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
613 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
614
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
615 /* Create the notify event */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
616 audio_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
617 if (audio_event == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
618 goto done;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
619 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
620
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
621 /* Set up the notify structures */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
622 for (i = 0; i < NUM_BUFFERS; ++i) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
623 notify_positions[i].dwOffset = i * mixlen;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
624 notify_positions[i].hEventNotify = audio_event;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
625 }
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
626 result = IDirectSoundNotify_SetNotificationPositions(notify,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
627 NUM_BUFFERS,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
628 notify_positions);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
629 if (result == DS_OK) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
630 retval = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
631 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
632 done:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
633 if (notify != NULL) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
634 IDirectSoundNotify_Release(notify);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
635 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
636 return (retval);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
637 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
638 #endif /* USE_POSITION_NOTIFY */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
639
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
640 static int
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
641 DX5_OpenAudio(_THIS, SDL_AudioSpec * spec)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
642 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
643 HRESULT result;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
644 WAVEFORMATEX waveformat;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
645
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
646 /* Set basic WAVE format parameters */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
647 SDL_memset(&waveformat, 0, sizeof(waveformat));
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
648 waveformat.wFormatTag = WAVE_FORMAT_PCM;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
649
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
650 /* Determine the audio parameters from the AudioSpec */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
651 switch (spec->format & 0xFF) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
652 case 8:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
653 /* Unsigned 8 bit audio data */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
654 spec->format = AUDIO_U8;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
655 silence = 0x80;
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656 waveformat.wBitsPerSample = 8;
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657 break;
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658 case 16:
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659 /* Signed 16 bit audio data */
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660 spec->format = AUDIO_S16;
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661 silence = 0x00;
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662 waveformat.wBitsPerSample = 16;
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663 break;
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664 default:
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665 SDL_SetError("Unsupported audio format");
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666 return (-1);
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667 }
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668 waveformat.nChannels = spec->channels;
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669 waveformat.nSamplesPerSec = spec->freq;
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670 waveformat.nBlockAlign =
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671 waveformat.nChannels * (waveformat.wBitsPerSample / 8);
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672 waveformat.nAvgBytesPerSec =
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673 waveformat.nSamplesPerSec * waveformat.nBlockAlign;
0
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674
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675 /* Update the fragment size as size in bytes */
1668
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676 SDL_CalculateAudioSpec(spec);
0
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diff changeset
677
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678 /* Open the audio device */
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679 result = DSoundCreate(NULL, &sound, NULL);
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680 if (result != DS_OK) {
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681 SetDSerror("DirectSoundCreate", result);
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682 return (-1);
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683 }
0
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diff changeset
684
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diff changeset
685 /* Create the audio buffer to which we write */
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686 NUM_BUFFERS = -1;
375
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diff changeset
687 #ifdef USE_PRIMARY_BUFFER
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688 if (mainwin) {
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689 NUM_BUFFERS = CreatePrimary(sound, mainwin, &mixbuf,
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690 &waveformat, spec->size);
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691 }
375
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692 #endif /* USE_PRIMARY_BUFFER */
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diff changeset
693 if (NUM_BUFFERS < 0) {
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diff changeset
694 NUM_BUFFERS = CreateSecondary(sound, mainwin, &mixbuf,
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diff changeset
695 &waveformat, spec->size);
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diff changeset
696 if (NUM_BUFFERS < 0) {
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697 return (-1);
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698 }
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diff changeset
699 #ifdef DEBUG_SOUND
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700 fprintf(stderr, "Using secondary audio buffer\n");
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diff changeset
701 #endif
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702 }
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diff changeset
703 #ifdef DEBUG_SOUND
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704 else
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705 fprintf(stderr, "Using primary audio buffer\n");
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diff changeset
706 #endif
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diff changeset
707
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parents: 1402
diff changeset
708 /* The buffer will auto-start playing in DX5_WaitAudio() */
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diff changeset
709 playing = 0;
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710 mixlen = spec->size;
0
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diff changeset
711
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diff changeset
712 #ifdef USE_POSITION_NOTIFY
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diff changeset
713 /* See if we can use DirectX 6 event notification */
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diff changeset
714 if (CreateAudioEvent(this) == 0) {
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diff changeset
715 this->WaitAudio = DX6_WaitAudio_EventWait;
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diff changeset
716 } else {
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diff changeset
717 this->WaitAudio = DX5_WaitAudio_BusyWait;
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diff changeset
718 }
0
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diff changeset
719 #endif
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diff changeset
720 return (0);
0
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parents:
diff changeset
721 }
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parents:
diff changeset
722
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diff changeset
723 /* vi: set ts=4 sw=4 expandtab: */