Mercurial > sdl-ios-xcode
annotate docs/html/sdlcreateyuvoverlay.html @ 1260:80f8c94b5199
Date: 10 Jun 2003 15:30:59 -0400
From: Mike Shal
Subject: [SDL] Bug in SDL_wave.c?
Hey everyone, I'm not sure if this is a bug in SDL, or if I just have
incorrect WAV files. The problem I'm having is loading multiple
concatenated WAVs from SDL_LoadWAV_RW. Some WAV files put comments at
the end of the file (which may be bad form), and SDL doesn't skip past
them when reading from the RWops. So the next WAV I try to load will
start at the comment section of the previous WAV, which obviously
doesn't work. If anyone else is having this problem, one quick fix you
can do is run sox on the bad WAVs, which strips out all of the comment
sections.
Eg:
$ sox sound.wav tmp.wav
$ mv -f tmp.wav sound.wav
The other fix is to patch SDL_wave.c, which is included with this email.
(Assuming I made the patch correctly :). All it does is calculate how
much remaining space there is in the WAV file after the data chunk, and
does SDL_RWseek to skip it. I don't think it should interfere with
anything else, but if someone could check it that would be nice :). If
the bug is really with SDL and not with my WAVs, can someone work this
into the next version of SDL? Thanks,
-Mike Shal
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 24 Jan 2006 07:20:18 +0000 |
parents | 355632dca928 |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_CreateYUVOverlay</TITLE | |
5 ><META | |
6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
0 | 8 "><LINK |
9 REL="HOME" | |
10 TITLE="SDL Library Documentation" | |
11 HREF="index.html"><LINK | |
12 REL="UP" | |
13 TITLE="Video" | |
14 HREF="video.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_GL_SwapBuffers" | |
17 HREF="sdlglswapbuffers.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_LockYUVOverlay" | |
20 HREF="sdllockyuvoverlay.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 | |
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31 SUMMARY="Header navigation table" |
0 | 32 WIDTH="100%" |
33 BORDER="0" | |
34 CELLPADDING="0" | |
35 CELLSPACING="0" | |
36 ><TR | |
37 ><TH | |
38 COLSPAN="3" | |
39 ALIGN="center" | |
40 >SDL Library Documentation</TH | |
41 ></TR | |
42 ><TR | |
43 ><TD | |
44 WIDTH="10%" | |
45 ALIGN="left" | |
46 VALIGN="bottom" | |
47 ><A | |
48 HREF="sdlglswapbuffers.html" | |
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49 ACCESSKEY="P" |
0 | 50 >Prev</A |
51 ></TD | |
52 ><TD | |
53 WIDTH="80%" | |
54 ALIGN="center" | |
55 VALIGN="bottom" | |
56 ></TD | |
57 ><TD | |
58 WIDTH="10%" | |
59 ALIGN="right" | |
60 VALIGN="bottom" | |
61 ><A | |
62 HREF="sdllockyuvoverlay.html" | |
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63 ACCESSKEY="N" |
0 | 64 >Next</A |
65 ></TD | |
66 ></TR | |
67 ></TABLE | |
68 ><HR | |
69 ALIGN="LEFT" | |
70 WIDTH="100%"></DIV | |
71 ><H1 | |
72 ><A | |
73 NAME="SDLCREATEYUVOVERLAY" | |
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74 ></A |
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75 >SDL_CreateYUVOverlay</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN2808" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_CreateYUVOverlay -- Create a YUV video overlay</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN2811" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN2812" |
0 | 95 ></A |
96 ><P | |
97 ></P | |
98 ><PRE | |
99 CLASS="FUNCSYNOPSISINFO" | |
100 >#include "SDL.h"</PRE | |
101 ><P | |
102 ><CODE | |
103 ><CODE | |
104 CLASS="FUNCDEF" | |
105 >SDL_Overlay *<B | |
106 CLASS="FSFUNC" | |
107 >SDL_CreateYUVOverlay</B | |
108 ></CODE | |
109 >(int width, int height, Uint32 format, SDL_Surface *display);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN2818" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 ><TT | |
124 CLASS="FUNCTION" | |
125 >SDL_CreateYUVOverlay</TT | |
126 > creates a YUV overlay of the specified <TT | |
127 CLASS="PARAMETER" | |
128 ><I | |
129 >width</I | |
130 ></TT | |
131 >, <TT | |
132 CLASS="PARAMETER" | |
133 ><I | |
134 >height</I | |
135 ></TT | |
136 > and <TT | |
137 CLASS="PARAMETER" | |
138 ><I | |
139 >format</I | |
140 ></TT | |
141 > (see <A | |
142 HREF="sdloverlay.html" | |
143 ><SPAN | |
144 CLASS="STRUCTNAME" | |
145 >SDL_Overlay</SPAN | |
146 ></A | |
147 > for a list of available formats), for the provided <TT | |
148 CLASS="PARAMETER" | |
149 ><I | |
150 >display</I | |
151 ></TT | |
152 >. A <A | |
153 HREF="sdloverlay.html" | |
154 ><SPAN | |
155 CLASS="STRUCTNAME" | |
156 >SDL_Overlay</SPAN | |
157 ></A | |
158 > structure is returned.</P | |
159 ><P | |
160 >The term 'overlay' is a misnomer since, unless the overlay is created in hardware, the contents for the display surface underneath the area where the overlay is shown will be overwritten when the overlay is displayed.</P | |
161 ></DIV | |
162 ><DIV | |
163 CLASS="REFSECT1" | |
164 ><A | |
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165 NAME="AEN2831" |
0 | 166 ></A |
167 ><H2 | |
168 >See Also</H2 | |
169 ><P | |
170 ><A | |
171 HREF="sdloverlay.html" | |
172 ><SPAN | |
173 CLASS="STRUCTNAME" | |
174 >SDL_Overlay</SPAN | |
175 ></A | |
176 >, | |
177 <A | |
178 HREF="sdldisplayyuvoverlay.html" | |
179 ><TT | |
180 CLASS="FUNCTION" | |
181 >SDL_DisplayYUVOverlay</TT | |
182 ></A | |
183 >, | |
184 <A | |
185 HREF="sdlfreeyuvoverlay.html" | |
186 ><TT | |
187 CLASS="FUNCTION" | |
188 >SDL_FreeYUVOverlay</TT | |
189 ></A | |
190 ></P | |
191 ></DIV | |
192 ><DIV | |
193 CLASS="NAVFOOTER" | |
194 ><HR | |
195 ALIGN="LEFT" | |
196 WIDTH="100%"><TABLE | |
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197 SUMMARY="Footer navigation table" |
0 | 198 WIDTH="100%" |
199 BORDER="0" | |
200 CELLPADDING="0" | |
201 CELLSPACING="0" | |
202 ><TR | |
203 ><TD | |
204 WIDTH="33%" | |
205 ALIGN="left" | |
206 VALIGN="top" | |
207 ><A | |
208 HREF="sdlglswapbuffers.html" | |
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209 ACCESSKEY="P" |
0 | 210 >Prev</A |
211 ></TD | |
212 ><TD | |
213 WIDTH="34%" | |
214 ALIGN="center" | |
215 VALIGN="top" | |
216 ><A | |
217 HREF="index.html" | |
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218 ACCESSKEY="H" |
0 | 219 >Home</A |
220 ></TD | |
221 ><TD | |
222 WIDTH="33%" | |
223 ALIGN="right" | |
224 VALIGN="top" | |
225 ><A | |
226 HREF="sdllockyuvoverlay.html" | |
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227 ACCESSKEY="N" |
0 | 228 >Next</A |
229 ></TD | |
230 ></TR | |
231 ><TR | |
232 ><TD | |
233 WIDTH="33%" | |
234 ALIGN="left" | |
235 VALIGN="top" | |
236 >SDL_GL_SwapBuffers</TD | |
237 ><TD | |
238 WIDTH="34%" | |
239 ALIGN="center" | |
240 VALIGN="top" | |
241 ><A | |
242 HREF="video.html" | |
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243 ACCESSKEY="U" |
0 | 244 >Up</A |
245 ></TD | |
246 ><TD | |
247 WIDTH="33%" | |
248 ALIGN="right" | |
249 VALIGN="top" | |
250 >SDL_LockYUVOverlay</TD | |
251 ></TR | |
252 ></TABLE | |
253 ></DIV | |
254 ></BODY | |
255 ></HTML | |
256 > |