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annotate src/cdrom/macosx/AudioFilePlayer.c @ 4168:69bcba65c388 SDL-1.2

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Fixed bug #526 Comment #1 From Simon Howard 2009-03-20 16:50:56 Hi, I'm the author of Chocolate Doom, one of the other source ports that James mentioned. This is a patch against the current SVN version of SDL 1.2 that fixes the bug. It has been tested and hopefully should be obviously correct from examining the changes. I'll give a brief explanation. When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED message is sent to the window. A WM_PALETTECHANGED message can also be received if the palette is changed for some other reason, like if the system palette is changed. Therefore, the palette change handler (DX5_PaletteChanged) has code to deal with this case. It distinguishes "expected" palette changes (set with SDL_SetPalette) from "unexpected" palette changes using the colorchange_expected variable, which is set before calling IDirectDrawPalette_SetEntries. However, the code to set this variable is missing in the fullscreen code path. By setting this variable, the palette change is handled properly and the freezes go away.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 13 Apr 2009 00:53:12 +0000
parents a1b03ba2fcd0
children 386181851388
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21
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22 This file based on Apple sample code. We haven't changed the file name,
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23 so if you want to see the original search for it on apple.com/developer
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24 */
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25 #include "SDL_config.h"
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26
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27 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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28 AudioFilePlayer.cpp
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29 */
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30 #include "AudioFilePlayer.h"
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31
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32 /*
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33 void ThrowResult (OSStatus result, const char* str)
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34 {
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35 SDL_SetError ("Error: %s %d", str, result);
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36 throw result;
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37 }
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38 */
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39
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40 #if DEBUG
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41 static void PrintStreamDesc (AudioStreamBasicDescription *inDesc)
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42 {
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43 if (!inDesc) {
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44 printf ("Can't print a NULL desc!\n");
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45 return;
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46 }
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47
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48 printf ("- - - - - - - - - - - - - - - - - - - -\n");
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49 printf (" Sample Rate:%f\n", inDesc->mSampleRate);
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50 printf (" Format ID:%s\n", (char*)&inDesc->mFormatID);
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51 printf (" Format Flags:%lX\n", inDesc->mFormatFlags);
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52 printf (" Bytes per Packet:%ld\n", inDesc->mBytesPerPacket);
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53 printf (" Frames per Packet:%ld\n", inDesc->mFramesPerPacket);
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54 printf (" Bytes per Frame:%ld\n", inDesc->mBytesPerFrame);
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55 printf (" Channels per Frame:%ld\n", inDesc->mChannelsPerFrame);
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56 printf (" Bits per Channel:%ld\n", inDesc->mBitsPerChannel);
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57 printf ("- - - - - - - - - - - - - - - - - - - -\n");
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58 }
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59 #endif
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60
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61
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62 static int AudioFilePlayer_SetDestination (AudioFilePlayer *afp, AudioUnit *inDestUnit)
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63 {
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64 /*if (afp->mConnected) throw static_cast<OSStatus>(-1);*/ /* can't set dest if already engaged */
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65 if (afp->mConnected)
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66 return 0 ;
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67
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68 SDL_memcpy(&afp->mPlayUnit, inDestUnit, sizeof (afp->mPlayUnit));
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69
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70 OSStatus result = noErr;
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71
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72
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73 /* we can "down" cast a component instance to a component */
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74 ComponentDescription desc;
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75 result = GetComponentInfo ((Component)*inDestUnit, &desc, 0, 0, 0);
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76 if (result) return 0; /*THROW_RESULT("GetComponentInfo")*/
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77
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78 /* we're going to use this to know which convert routine to call
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79 a v1 audio unit will have a type of 'aunt'
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80 a v2 audio unit will have one of several different types. */
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81 if (desc.componentType != kAudioUnitComponentType) {
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82 result = badComponentInstance;
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83 /*THROW_RESULT("BAD COMPONENT")*/
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84 if (result) return 0;
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85 }
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86
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87 /* Set the input format of the audio unit. */
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88 result = AudioUnitSetProperty (*inDestUnit,
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89 kAudioUnitProperty_StreamFormat,
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90 kAudioUnitScope_Input,
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91 0,
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92 &afp->mFileDescription,
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93 sizeof (afp->mFileDescription));
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94 /*THROW_RESULT("AudioUnitSetProperty")*/
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95 if (result) return 0;
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96 return 1;
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97 }
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98
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99 static void AudioFilePlayer_SetNotifier(AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon)
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100 {
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101 afp->mNotifier = inNotifier;
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102 afp->mRefCon = inRefCon;
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103 }
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104
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105 static int AudioFilePlayer_IsConnected(AudioFilePlayer *afp)
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106 {
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107 return afp->mConnected;
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108 }
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109
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110 static AudioUnit AudioFilePlayer_GetDestUnit(AudioFilePlayer *afp)
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111 {
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112 return afp->mPlayUnit;
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113 }
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114
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115 static void AudioFilePlayer_Print(AudioFilePlayer *afp)
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116 {
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117 #if DEBUG
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118 printf ("Is Connected:%s\n", (IsConnected() ? "true" : "false"));
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119 printf ("- - - - - - - - - - - - - - \n");
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120 #endif
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121 }
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122
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123 static void AudioFilePlayer_SetStartFrame (AudioFilePlayer *afp, int frame)
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124 {
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125 SInt64 position = frame * 2352;
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126
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127 afp->mStartFrame = frame;
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128 afp->mAudioFileManager->SetPosition (afp->mAudioFileManager, position);
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129 }
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130
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131
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132 static int AudioFilePlayer_GetCurrentFrame (AudioFilePlayer *afp)
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133 {
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134 return afp->mStartFrame + (afp->mAudioFileManager->GetByteCounter(afp->mAudioFileManager) / 2352);
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135 }
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136
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137 static void AudioFilePlayer_SetStopFrame (AudioFilePlayer *afp, int frame)
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138 {
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139 SInt64 position = frame * 2352;
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140
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141 afp->mAudioFileManager->SetEndOfFile (afp->mAudioFileManager, position);
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142 }
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143
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144 void delete_AudioFilePlayer(AudioFilePlayer *afp)
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145 {
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146 if (afp != NULL)
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147 {
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148 afp->Disconnect(afp);
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149
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150 if (afp->mAudioFileManager) {
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151 delete_AudioFileManager(afp->mAudioFileManager);
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152 afp->mAudioFileManager = 0;
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153 }
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154
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155 if (afp->mForkRefNum) {
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156 FSCloseFork (afp->mForkRefNum);
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157 afp->mForkRefNum = 0;
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158 }
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159 SDL_free(afp);
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160 }
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161 }
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162
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163 static int AudioFilePlayer_Connect(AudioFilePlayer *afp)
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164 {
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165 #if DEBUG
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166 printf ("Connect:%x, engaged=%d\n", (int)afp->mPlayUnit, (afp->mConnected ? 1 : 0));
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167 #endif
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168 if (!afp->mConnected)
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169 {
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170 if (!afp->mAudioFileManager->DoConnect(afp->mAudioFileManager))
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171 return 0;
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172
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173 /* set the render callback for the file data to be supplied to the sound converter AU */
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174 afp->mInputCallback.inputProc = afp->mAudioFileManager->FileInputProc;
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175 afp->mInputCallback.inputProcRefCon = afp->mAudioFileManager;
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176
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177 OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
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178 kAudioUnitProperty_SetInputCallback,
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179 kAudioUnitScope_Input,
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180 0,
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181 &afp->mInputCallback,
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182 sizeof(afp->mInputCallback));
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183 if (result) return 0; /*THROW_RESULT("AudioUnitSetProperty")*/
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184 afp->mConnected = 1;
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185 }
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186
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187 return 1;
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188 }
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189
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190 /* warning noted, now please go away ;-) */
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191 /* #warning This should redirect the calling of notification code to some other thread */
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192 static void AudioFilePlayer_DoNotification (AudioFilePlayer *afp, OSStatus inStatus)
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193 {
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194 if (afp->mNotifier) {
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195 (*afp->mNotifier) (afp->mRefCon, inStatus);
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196 } else {
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197 SDL_SetError ("Notification posted with no notifier in place");
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198
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199 if (inStatus == kAudioFilePlay_FileIsFinished)
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200 afp->Disconnect(afp);
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201 else if (inStatus != kAudioFilePlayErr_FilePlayUnderrun)
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202 afp->Disconnect(afp);
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203 }
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204 }
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205
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206 static void AudioFilePlayer_Disconnect (AudioFilePlayer *afp)
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207 {
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208 #if DEBUG
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209 printf ("Disconnect:%x,%ld, engaged=%d\n", (int)afp->mPlayUnit, 0, (afp->mConnected ? 1 : 0));
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210 #endif
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211 if (afp->mConnected)
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212 {
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213 afp->mConnected = 0;
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214
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215 afp->mInputCallback.inputProc = 0;
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216 afp->mInputCallback.inputProcRefCon = 0;
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217 OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
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218 kAudioUnitProperty_SetInputCallback,
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219 kAudioUnitScope_Input,
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220 0,
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221 &afp->mInputCallback,
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222 sizeof(afp->mInputCallback));
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223 if (result)
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224 SDL_SetError ("AudioUnitSetProperty:RemoveInputCallback:%ld", result);
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225
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226 afp->mAudioFileManager->Disconnect(afp->mAudioFileManager);
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227 }
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228 }
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229
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230 typedef struct {
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231 UInt32 offset;
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232 UInt32 blockSize;
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233 } SSNDData;
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234
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235 static int AudioFilePlayer_OpenFile (AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileDataSize)
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236 {
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237 ContainerChunk chunkHeader;
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238 ChunkHeader chunk;
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239 SSNDData ssndData;
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240
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241 OSErr result;
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242 HFSUniStr255 dfName;
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243 ByteCount actual;
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244 SInt64 offset;
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245
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246 /* Open the data fork of the input file */
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247 result = FSGetDataForkName(&dfName);
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248 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSGetDataForkName")*/
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249
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250 result = FSOpenFork(inRef, dfName.length, dfName.unicode, fsRdPerm, &afp->mForkRefNum);
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251 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSOpenFork")*/
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252
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253 /* Read the file header, and check if it's indeed an AIFC file */
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254 result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(chunkHeader), &chunkHeader, &actual);
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255 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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256
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257 if (chunkHeader.ckID != 'FORM') {
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258 result = -1;
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259 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): chunk id is not 'FORM'");*/
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260 }
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261
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262 if (chunkHeader.formType != 'AIFC') {
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263 result = -1;
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264 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): file format is not 'AIFC'");*/
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265 }
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266
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267 /* Search for the SSND chunk. We ignore all compression etc. information
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268 in other chunks. Of course that is kind of evil, but for now we are lazy
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269 and rely on the cdfs to always give us the same fixed format.
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270 TODO: Parse the COMM chunk we currently skip to fill in mFileDescription.
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271 */
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272 offset = 0;
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273 do {
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274 result = FSReadFork(afp->mForkRefNum, fsFromMark, offset, sizeof(chunk), &chunk, &actual);
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275 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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276
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277 /* Skip the chunk data */
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278 offset = chunk.ckSize;
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279 } while (chunk.ckID != 'SSND');
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280
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281 /* Read the header of the SSND chunk. After this, we are positioned right
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282 at the start of the audio data. */
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283 result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(ssndData), &ssndData, &actual);
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284 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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285
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286 result = FSSetForkPosition(afp->mForkRefNum, fsFromMark, ssndData.offset);
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287 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSSetForkPosition")*/
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288
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289 /* Data size */
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290 *outFileDataSize = chunk.ckSize - ssndData.offset - 8;
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291
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292 /* File format */
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293 afp->mFileDescription.mSampleRate = 44100;
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294 afp->mFileDescription.mFormatID = kAudioFormatLinearPCM;
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295 afp->mFileDescription.mFormatFlags = kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger;
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296 afp->mFileDescription.mBytesPerPacket = 4;
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297 afp->mFileDescription.mFramesPerPacket = 1;
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298 afp->mFileDescription.mBytesPerFrame = 4;
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299 afp->mFileDescription.mChannelsPerFrame = 2;
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300 afp->mFileDescription.mBitsPerChannel = 16;
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301
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302 return 1;
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303 }
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304
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305 AudioFilePlayer *new_AudioFilePlayer (const FSRef *inFileRef)
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306 {
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307 SInt64 fileDataSize = 0;
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308
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309 AudioFilePlayer *afp = (AudioFilePlayer *) SDL_malloc(sizeof (AudioFilePlayer));
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310 if (afp == NULL)
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311 return NULL;
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312 SDL_memset(afp, '\0', sizeof (*afp));
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313
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314 #define SET_AUDIOFILEPLAYER_METHOD(m) afp->m = AudioFilePlayer_##m
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315 SET_AUDIOFILEPLAYER_METHOD(SetDestination);
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316 SET_AUDIOFILEPLAYER_METHOD(SetNotifier);
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317 SET_AUDIOFILEPLAYER_METHOD(SetStartFrame);
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318 SET_AUDIOFILEPLAYER_METHOD(GetCurrentFrame);
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319 SET_AUDIOFILEPLAYER_METHOD(SetStopFrame);
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320 SET_AUDIOFILEPLAYER_METHOD(Connect);
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321 SET_AUDIOFILEPLAYER_METHOD(Disconnect);
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322 SET_AUDIOFILEPLAYER_METHOD(DoNotification);
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323 SET_AUDIOFILEPLAYER_METHOD(IsConnected);
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324 SET_AUDIOFILEPLAYER_METHOD(GetDestUnit);
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325 SET_AUDIOFILEPLAYER_METHOD(Print);
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326 SET_AUDIOFILEPLAYER_METHOD(OpenFile);
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327 #undef SET_AUDIOFILEPLAYER_METHOD
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328
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329 if (!afp->OpenFile (afp, inFileRef, &fileDataSize))
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330 {
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331 SDL_free(afp);
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332 return NULL;
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333 }
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334
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335 /* we want about 4 seconds worth of data for the buffer */
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336 int bytesPerSecond = (UInt32) (4 * afp->mFileDescription.mSampleRate * afp->mFileDescription.mBytesPerFrame);
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337
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338 #if DEBUG
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339 printf("File format:\n");
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340 PrintStreamDesc (&afp->mFileDescription);
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341 #endif
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342
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343 afp->mAudioFileManager = new_AudioFileManager(afp, afp->mForkRefNum,
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344 fileDataSize,
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345 bytesPerSecond);
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346 if (afp->mAudioFileManager == NULL)
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347 {
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348 delete_AudioFilePlayer(afp);
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349 return NULL;
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350 }
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351
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352 return afp;
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353 }
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354