Mercurial > sdl-ios-xcode
annotate docs/html/audio.html @ 787:07760c8854d1
Date: Sat, 24 Jan 2004 14:49:58 +0100
From: Stephane Marchesin
Subject: Re: [SDL] 3DNow! detection on a P4 system
Well... I found another bug : 3dnow was detected on P2/P3 cpus. So I
took one more look at the code and found a mistake in
CPU_getCPUIDFeaturesExt :
The condition for having extended cpuinfo is that when we query extended
cpuinfo we get a result >= 0x80000001. So we must exit if eax < 0x80000001.
The attached patch does that.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 24 Jan 2004 15:55:00 +0000 |
| parents | 55f1f1b3e27d |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Audio</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
7 CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="SDL Reference" | |
| 14 HREF="reference.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_JoystickClose" | |
| 17 HREF="sdljoystickclose.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_AudioSpec" | |
| 20 HREF="sdlaudiospec.html"><META | |
| 21 NAME="KEYWORD" | |
| 22 CONTENT="audio"><META | |
| 23 NAME="KEYWORD" | |
| 24 CONTENT="function"></HEAD | |
| 25 ><BODY | |
| 26 CLASS="CHAPTER" | |
| 27 BGCOLOR="#FFF8DC" | |
| 28 TEXT="#000000" | |
| 29 LINK="#0000ee" | |
| 30 VLINK="#551a8b" | |
| 31 ALINK="#ff0000" | |
| 32 ><DIV | |
| 33 CLASS="NAVHEADER" | |
| 34 ><TABLE | |
| 35 WIDTH="100%" | |
| 36 BORDER="0" | |
| 37 CELLPADDING="0" | |
| 38 CELLSPACING="0" | |
| 39 ><TR | |
| 40 ><TH | |
| 41 COLSPAN="3" | |
| 42 ALIGN="center" | |
| 43 >SDL Library Documentation</TH | |
| 44 ></TR | |
| 45 ><TR | |
| 46 ><TD | |
| 47 WIDTH="10%" | |
| 48 ALIGN="left" | |
| 49 VALIGN="bottom" | |
| 50 ><A | |
| 51 HREF="sdljoystickclose.html" | |
| 52 >Prev</A | |
| 53 ></TD | |
| 54 ><TD | |
| 55 WIDTH="80%" | |
| 56 ALIGN="center" | |
| 57 VALIGN="bottom" | |
| 58 ></TD | |
| 59 ><TD | |
| 60 WIDTH="10%" | |
| 61 ALIGN="right" | |
| 62 VALIGN="bottom" | |
| 63 ><A | |
| 64 HREF="sdlaudiospec.html" | |
| 65 >Next</A | |
| 66 ></TD | |
| 67 ></TR | |
| 68 ></TABLE | |
| 69 ><HR | |
| 70 ALIGN="LEFT" | |
| 71 WIDTH="100%"></DIV | |
| 72 ><DIV | |
| 73 CLASS="CHAPTER" | |
| 74 ><H1 | |
| 75 ><A | |
| 76 NAME="AUDIO" | |
| 77 >Chapter 10. Audio</A | |
| 78 ></H1 | |
| 79 ><DIV | |
| 80 CLASS="TOC" | |
| 81 ><DL | |
| 82 ><DT | |
| 83 ><B | |
| 84 >Table of Contents</B | |
| 85 ></DT | |
| 86 ><DT | |
| 87 ><A | |
| 88 HREF="sdlaudiospec.html" | |
| 89 >SDL_AudioSpec</A | |
| 90 > — Audio Specification Structure</DT | |
| 91 ><DT | |
| 92 ><A | |
| 93 HREF="sdlopenaudio.html" | |
| 94 >SDL_OpenAudio</A | |
| 95 > — Opens the audio device with the desired parameters.</DT | |
| 96 ><DT | |
| 97 ><A | |
| 98 HREF="sdlpauseaudio.html" | |
| 99 >SDL_PauseAudio</A | |
| 100 > — Pauses and unpauses the audio callback processing</DT | |
| 101 ><DT | |
| 102 ><A | |
| 103 HREF="sdlgetaudiostatus.html" | |
| 104 >SDL_GetAudioStatus</A | |
| 105 > — Get the current audio state</DT | |
| 106 ><DT | |
| 107 ><A | |
| 108 HREF="sdlloadwav.html" | |
| 109 >SDL_LoadWAV</A | |
| 110 > — Load a WAVE file</DT | |
| 111 ><DT | |
| 112 ><A | |
| 113 HREF="sdlfreewav.html" | |
| 114 >SDL_FreeWAV</A | |
| 115 > — Frees previously opened WAV data</DT | |
| 116 ><DT | |
| 117 ><A | |
| 118 HREF="sdlaudiocvt.html" | |
| 119 >SDL_AudioCVT</A | |
| 120 > — Audio Conversion Structure</DT | |
| 121 ><DT | |
| 122 ><A | |
| 123 HREF="sdlbuildaudiocvt.html" | |
| 124 >SDL_BuildAudioCVT</A | |
| 125 > — Initializes a SDL_AudioCVT structure for conversion</DT | |
| 126 ><DT | |
| 127 ><A | |
| 128 HREF="sdlconvertaudio.html" | |
| 129 >SDL_ConvertAudio</A | |
| 130 > — Convert audio data to a desired audio format.</DT | |
| 131 ><DT | |
| 132 ><A | |
| 133 HREF="sdlmixaudio.html" | |
| 134 >SDL_MixAudio</A | |
| 135 > — Mix audio data</DT | |
| 136 ><DT | |
| 137 ><A | |
| 138 HREF="sdllockaudio.html" | |
| 139 >SDL_LockAudio</A | |
| 140 > — Lock out the callback function</DT | |
| 141 ><DT | |
| 142 ><A | |
| 143 HREF="sdlunlockaudio.html" | |
| 144 >SDL_UnlockAudio</A | |
| 145 > — Unlock the callback function</DT | |
| 146 ><DT | |
| 147 ><A | |
| 148 HREF="sdlcloseaudio.html" | |
| 149 >SDL_CloseAudio</A | |
| 150 > — Shuts down audio processing and closes the audio device.</DT | |
| 151 ></DL | |
| 152 ></DIV | |
| 153 ><P | |
| 154 >Sound on the computer is translated from waves that you hear into a series of | |
| 155 values, or samples, each representing the amplitude of the wave. When these | |
| 156 samples are sent in a stream to a sound card, an approximation of the original | |
| 157 wave can be recreated. The more bits used to represent the amplitude, and the | |
| 158 greater frequency these samples are gathered, the closer the approximated | |
| 159 sound is to the original, and the better the quality of sound.</P | |
| 160 ><P | |
| 161 >This library supports both 8 and 16 bit signed and unsigned sound samples, | |
| 162 at frequencies ranging from 11025 Hz to 44100 Hz, depending on the | |
| 163 underlying hardware. If the hardware doesn't support the desired audio | |
| 164 format or frequency, it can be emulated if desired (See | |
| 165 <A | |
| 166 HREF="sdlopenaudio.html" | |
| 167 ><TT | |
| 168 CLASS="FUNCTION" | |
| 169 >SDL_OpenAudio()</TT | |
| 170 ></A | |
| 171 >)</P | |
| 172 ><P | |
| 173 >A commonly supported audio format is 16 bits per sample at 22050 Hz.</P | |
| 174 ></DIV | |
| 175 ><DIV | |
| 176 CLASS="NAVFOOTER" | |
| 177 ><HR | |
| 178 ALIGN="LEFT" | |
| 179 WIDTH="100%"><TABLE | |
| 180 WIDTH="100%" | |
| 181 BORDER="0" | |
| 182 CELLPADDING="0" | |
| 183 CELLSPACING="0" | |
| 184 ><TR | |
| 185 ><TD | |
| 186 WIDTH="33%" | |
| 187 ALIGN="left" | |
| 188 VALIGN="top" | |
| 189 ><A | |
| 190 HREF="sdljoystickclose.html" | |
| 191 >Prev</A | |
| 192 ></TD | |
| 193 ><TD | |
| 194 WIDTH="34%" | |
| 195 ALIGN="center" | |
| 196 VALIGN="top" | |
| 197 ><A | |
| 198 HREF="index.html" | |
| 199 >Home</A | |
| 200 ></TD | |
| 201 ><TD | |
| 202 WIDTH="33%" | |
| 203 ALIGN="right" | |
| 204 VALIGN="top" | |
| 205 ><A | |
| 206 HREF="sdlaudiospec.html" | |
| 207 >Next</A | |
| 208 ></TD | |
| 209 ></TR | |
| 210 ><TR | |
| 211 ><TD | |
| 212 WIDTH="33%" | |
| 213 ALIGN="left" | |
| 214 VALIGN="top" | |
| 215 >SDL_JoystickClose</TD | |
| 216 ><TD | |
| 217 WIDTH="34%" | |
| 218 ALIGN="center" | |
| 219 VALIGN="top" | |
| 220 ><A | |
| 221 HREF="reference.html" | |
| 222 >Up</A | |
| 223 ></TD | |
| 224 ><TD | |
| 225 WIDTH="33%" | |
| 226 ALIGN="right" | |
| 227 VALIGN="top" | |
| 228 >SDL_AudioSpec</TD | |
| 229 ></TR | |
| 230 ></TABLE | |
| 231 ></DIV | |
| 232 ></BODY | |
| 233 ></HTML | |
| 234 > |