annotate docs/man3/SDL_CDPlayTracks.3 @ 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>
date Tue, 24 Jan 2006 07:20:18 +0000
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1 .TH "SDL_CDPlayTracks" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_CDPlayTracks\- Play the given CD track(s)
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4 .SH "SYNOPSIS"
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5 .PP
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6 \fB#include "SDL\&.h"
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7 .sp
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8 \fBint \fBSDL_CDPlayTracks\fP\fR(\fBSDL_CD *cdrom, int start_track, int start_frame, int ntracks, int nframes)\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 \fBSDL_CDPlayTracks\fP plays the given CD starting at track \fBstart_track\fR, for \fBntracks\fR tracks\&.
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12 .PP
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13 \fBstart_frame\fR is the frame offset, from the beginning of the \fBstart_track\fR, at which to start\&. \fBnframes\fR is the frame offset, from the beginning of the last track (\fBstart_track\fR+\fBntracks\fR), at which to end playing\&.
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14 .PP
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15 \fBSDL_CDPlayTracks\fP should only be called after calling \fI\fBSDL_CDStatus\fP\fR to get track information about the CD\&.
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16 .PP
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17 .RS
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18 \fBNote:
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19 .PP
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20 Data tracks are ignored\&.
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21 .RE
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22 .SH "RETURN VALUE"
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23 .PP
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24 Returns \fB0\fR, or \fB-1\fR if there was an error\&.
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25 .SH "EXAMPLES"
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26 .PP
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27 .PP
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28 .nf
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29 \f(CW/* assuming cdrom is a previously opened device */
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30 /* Play the entire CD */
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31 if(CD_INDRIVE(SDL_CDStatus(cdrom)))
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32 SDL_CDPlayTracks(cdrom, 0, 0, 0, 0);
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33
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34 /* Play the first track */
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35 if(CD_INDRIVE(SDL_CDStatus(cdrom)))
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36 SDL_CDPlayTracks(cdrom, 0, 0, 1, 0);
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37
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38 /* Play first 15 seconds of the 2nd track */
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39 if(CD_INDRIVE(SDL_CDStatus(cdrom)))
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40 SDL_CDPlayTracks(cdrom, 1, 0, 0, CD_FPS*15);\fR
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41 .fi
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42 .PP
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43
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44 .SH "SEE ALSO"
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45 .PP
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46 \fI\fBSDL_CDPlay\fP\fR, \fI\fBSDL_CDStatus\fP\fR, \fI\fBSDL_CD\fP\fR
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47 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58