Mercurial > sdl-ios-xcode
annotate docs/html/sdlloadwav.html @ 756:10332c6fad2e
te: Mon, 15 Dec 2003 08:25:14 -0800 PST
From: "Andrew Bachmann"
Subject: libSDL patches for beos video
I created some patches to SDL:
1. YUV overlay support
2. maintain high refresh rate when changing resolutions to a lower resolution
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 16 Dec 2003 13:04:44 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_LoadWAV</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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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="Audio" | |
| 14 HREF="audio.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_GetAudioStatus" | |
| 17 HREF="sdlgetaudiostatus.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_FreeWAV" | |
| 20 HREF="sdlfreewav.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
| 31 WIDTH="100%" | |
| 32 BORDER="0" | |
| 33 CELLPADDING="0" | |
| 34 CELLSPACING="0" | |
| 35 ><TR | |
| 36 ><TH | |
| 37 COLSPAN="3" | |
| 38 ALIGN="center" | |
| 39 >SDL Library Documentation</TH | |
| 40 ></TR | |
| 41 ><TR | |
| 42 ><TD | |
| 43 WIDTH="10%" | |
| 44 ALIGN="left" | |
| 45 VALIGN="bottom" | |
| 46 ><A | |
| 47 HREF="sdlgetaudiostatus.html" | |
| 48 >Prev</A | |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 ></TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="sdlfreewav.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><H1 | |
| 69 ><A | |
| 70 NAME="SDLLOADWAV" | |
| 71 >SDL_LoadWAV</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN6428" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_LoadWAV -- Load a WAVE file</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
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84 NAME="AEN6431" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
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91 NAME="AEN6432" |
| 0 | 92 ></A |
| 93 ><P | |
| 94 ></P | |
| 95 ><PRE | |
| 96 CLASS="FUNCSYNOPSISINFO" | |
| 97 >#include "SDL.h"</PRE | |
| 98 ><P | |
| 99 ><CODE | |
| 100 ><CODE | |
| 101 CLASS="FUNCDEF" | |
| 102 >SDL_AudioSpec *<B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_LoadWAV</B | |
| 105 ></CODE | |
| 106 >(const char *file, SDL_AudioSpec *spec, Uint8 **audio_buf, Uint32 *audio_len);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN6438" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 ><TT | |
| 121 CLASS="FUNCTION" | |
| 122 >SDL_LoadWAV</TT | |
| 123 > | |
| 124 This function loads a WAVE <TT | |
| 125 CLASS="PARAMETER" | |
| 126 ><I | |
| 127 >file</I | |
| 128 ></TT | |
| 129 > into memory.</P | |
| 130 ><P | |
| 131 >If this function succeeds, it returns the given | |
| 132 <A | |
| 133 HREF="sdlaudiospec.html" | |
| 134 ><TT | |
| 135 CLASS="FUNCTION" | |
| 136 >SDL_AudioSpec</TT | |
| 137 ></A | |
| 138 >, | |
| 139 filled with the audio data format of the wave data, and sets | |
| 140 <TT | |
| 141 CLASS="PARAMETER" | |
| 142 ><I | |
| 143 >audio_buf</I | |
| 144 ></TT | |
| 145 > to a <TT | |
| 146 CLASS="FUNCTION" | |
| 147 >malloc</TT | |
| 148 >'d | |
| 149 buffer containing the audio data, and sets <TT | |
| 150 CLASS="PARAMETER" | |
| 151 ><I | |
| 152 >audio_len</I | |
| 153 ></TT | |
| 154 > | |
| 155 to the length of that audio buffer, in bytes. You need to free the audio | |
| 156 buffer with <A | |
| 157 HREF="sdlfreewav.html" | |
| 158 ><TT | |
| 159 CLASS="FUNCTION" | |
| 160 >SDL_FreeWAV</TT | |
| 161 ></A | |
| 162 > when you are | |
| 163 done with it.</P | |
| 164 ><P | |
| 165 >This function returns <TT | |
| 166 CLASS="LITERAL" | |
| 167 >NULL</TT | |
| 168 > and sets the SDL | |
| 169 error message if the wave file cannot be opened, uses an unknown data format, | |
| 170 or is corrupt. Currently raw, MS-ADPCM and IMA-ADPCM WAVE files are supported.</P | |
| 171 ></DIV | |
| 172 ><DIV | |
| 173 CLASS="REFSECT1" | |
| 174 ><A | |
|
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175 NAME="AEN6453" |
| 0 | 176 ></A |
| 177 ><H2 | |
| 178 >Example</H2 | |
| 179 ><PRE | |
| 180 CLASS="PROGRAMLISTING" | |
| 181 >SDL_AudioSpec wav_spec; | |
| 182 Uint32 wav_length; | |
| 183 Uint8 *wav_buffer; | |
| 184 | |
| 185 /* Load the WAV */ | |
| 186 if( SDL_LoadWAV("test.wav", &wav_spec, &wav_buffer, &wav_length) == NULL ){ | |
| 187 fprintf(stderr, "Could not open test.wav: %s\n", SDL_GetError()); | |
| 188 exit(-1); | |
| 189 } | |
| 190 . | |
| 191 . | |
| 192 . | |
| 193 /* Do stuff with the WAV */ | |
| 194 . | |
| 195 . | |
| 196 /* Free It */ | |
| 197 SDL_FreeWAV(wav_buffer);</PRE | |
| 198 ></DIV | |
| 199 ><DIV | |
| 200 CLASS="REFSECT1" | |
| 201 ><A | |
|
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202 NAME="AEN6456" |
| 0 | 203 ></A |
| 204 ><H2 | |
| 205 >See Also</H2 | |
| 206 ><P | |
| 207 ><A | |
| 208 HREF="sdlaudiospec.html" | |
| 209 ><SPAN | |
| 210 CLASS="STRUCTNAME" | |
| 211 >SDL_AudioSpec</SPAN | |
| 212 ></A | |
| 213 >, | |
| 214 <A | |
| 215 HREF="sdlopenaudio.html" | |
| 216 ><TT | |
| 217 CLASS="FUNCTION" | |
| 218 >SDL_OpenAudio</TT | |
| 219 ></A | |
| 220 >, | |
| 221 <A | |
| 222 HREF="sdlfreewav.html" | |
| 223 ><TT | |
| 224 CLASS="FUNCTION" | |
| 225 >SDL_FreeWAV</TT | |
| 226 ></A | |
| 227 ></P | |
| 228 ></DIV | |
| 229 ><DIV | |
| 230 CLASS="NAVFOOTER" | |
| 231 ><HR | |
| 232 ALIGN="LEFT" | |
| 233 WIDTH="100%"><TABLE | |
| 234 WIDTH="100%" | |
| 235 BORDER="0" | |
| 236 CELLPADDING="0" | |
| 237 CELLSPACING="0" | |
| 238 ><TR | |
| 239 ><TD | |
| 240 WIDTH="33%" | |
| 241 ALIGN="left" | |
| 242 VALIGN="top" | |
| 243 ><A | |
| 244 HREF="sdlgetaudiostatus.html" | |
| 245 >Prev</A | |
| 246 ></TD | |
| 247 ><TD | |
| 248 WIDTH="34%" | |
| 249 ALIGN="center" | |
| 250 VALIGN="top" | |
| 251 ><A | |
| 252 HREF="index.html" | |
| 253 >Home</A | |
| 254 ></TD | |
| 255 ><TD | |
| 256 WIDTH="33%" | |
| 257 ALIGN="right" | |
| 258 VALIGN="top" | |
| 259 ><A | |
| 260 HREF="sdlfreewav.html" | |
| 261 >Next</A | |
| 262 ></TD | |
| 263 ></TR | |
| 264 ><TR | |
| 265 ><TD | |
| 266 WIDTH="33%" | |
| 267 ALIGN="left" | |
| 268 VALIGN="top" | |
| 269 >SDL_GetAudioStatus</TD | |
| 270 ><TD | |
| 271 WIDTH="34%" | |
| 272 ALIGN="center" | |
| 273 VALIGN="top" | |
| 274 ><A | |
| 275 HREF="audio.html" | |
| 276 >Up</A | |
| 277 ></TD | |
| 278 ><TD | |
| 279 WIDTH="33%" | |
| 280 ALIGN="right" | |
| 281 VALIGN="top" | |
| 282 >SDL_FreeWAV</TD | |
| 283 ></TR | |
| 284 ></TABLE | |
| 285 ></DIV | |
| 286 ></BODY | |
| 287 ></HTML | |
| 288 > |