Mercurial > sdl-ios-xcode
annotate docs/html/sdlpauseaudio.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_PauseAudio</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="Audio" | |
14 HREF="audio.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_OpenAudio" | |
17 HREF="sdlopenaudio.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_GetAudioStatus" | |
20 HREF="sdlgetaudiostatus.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="sdlopenaudio.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="sdlgetaudiostatus.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="SDLPAUSEAUDIO" | |
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74 ></A |
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75 >SDL_PauseAudio</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN6765" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_PauseAudio -- Pauses and unpauses the audio callback processing</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN6768" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN6769" |
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 >void <B | |
106 CLASS="FSFUNC" | |
107 >SDL_PauseAudio</B | |
108 ></CODE | |
109 >(int pause_on);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN6775" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >This function pauses and unpauses the audio callback processing. | |
124 It should be called with <TT | |
125 CLASS="PARAMETER" | |
126 ><I | |
127 >pause_on</I | |
128 ></TT | |
129 >=0 after opening the audio | |
130 device to start playing sound. This is so you can safely initialize | |
131 data for your callback function after opening the audio device. | |
132 Silence will be written to the audio device during the pause.</P | |
133 ></DIV | |
134 ><DIV | |
135 CLASS="REFSECT1" | |
136 ><A | |
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137 NAME="AEN6779" |
0 | 138 ></A |
139 ><H2 | |
140 >See Also</H2 | |
141 ><P | |
142 ><A | |
143 HREF="sdlgetaudiostatus.html" | |
144 ><TT | |
145 CLASS="FUNCTION" | |
146 >SDL_GetAudioStatus</TT | |
147 ></A | |
148 >, | |
149 <A | |
150 HREF="sdlopenaudio.html" | |
151 ><TT | |
152 CLASS="FUNCTION" | |
153 >SDL_OpenAudio</TT | |
154 ></A | |
155 ></P | |
156 ></DIV | |
157 ><DIV | |
158 CLASS="NAVFOOTER" | |
159 ><HR | |
160 ALIGN="LEFT" | |
161 WIDTH="100%"><TABLE | |
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162 SUMMARY="Footer navigation table" |
0 | 163 WIDTH="100%" |
164 BORDER="0" | |
165 CELLPADDING="0" | |
166 CELLSPACING="0" | |
167 ><TR | |
168 ><TD | |
169 WIDTH="33%" | |
170 ALIGN="left" | |
171 VALIGN="top" | |
172 ><A | |
173 HREF="sdlopenaudio.html" | |
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174 ACCESSKEY="P" |
0 | 175 >Prev</A |
176 ></TD | |
177 ><TD | |
178 WIDTH="34%" | |
179 ALIGN="center" | |
180 VALIGN="top" | |
181 ><A | |
182 HREF="index.html" | |
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183 ACCESSKEY="H" |
0 | 184 >Home</A |
185 ></TD | |
186 ><TD | |
187 WIDTH="33%" | |
188 ALIGN="right" | |
189 VALIGN="top" | |
190 ><A | |
191 HREF="sdlgetaudiostatus.html" | |
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192 ACCESSKEY="N" |
0 | 193 >Next</A |
194 ></TD | |
195 ></TR | |
196 ><TR | |
197 ><TD | |
198 WIDTH="33%" | |
199 ALIGN="left" | |
200 VALIGN="top" | |
201 >SDL_OpenAudio</TD | |
202 ><TD | |
203 WIDTH="34%" | |
204 ALIGN="center" | |
205 VALIGN="top" | |
206 ><A | |
207 HREF="audio.html" | |
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208 ACCESSKEY="U" |
0 | 209 >Up</A |
210 ></TD | |
211 ><TD | |
212 WIDTH="33%" | |
213 ALIGN="right" | |
214 VALIGN="top" | |
215 >SDL_GetAudioStatus</TD | |
216 ></TR | |
217 ></TABLE | |
218 ></DIV | |
219 ></BODY | |
220 ></HTML | |
221 > |