annotate src/audio/SDL_wave.h @ 1551:02e19471a694

Fixed bug #4 [Note: I'm applying this patch since it's a cleaner version of what's already implemented, and supports this controller on older kernels. I'll ask to make sure this doesn't break on the new kernels where it's no longer necessary] Date: Mon, 21 Mar 2005 09:41:11 -0500 From: Chris Nelson Subject: SDL Patch Hey, Ryan. I submitted the following patch about a year ago. It's just a simple patch for the linux port, to make multiple joysticks each appear to SDL as their own device, if they are on the same USB port (specifically, these guys <http://www.consoleplus.co.uk/product_info.php?pName=super-joybox-5-quad-joypad-converter>, which allow 4 Playstation2 controllers to be accessed via a single USB port). Without this patch, SDL pretty much drops the ball, and reports that there are 4 joysticks available when less than that number are plugged in. My work built upon the work of another person with the same device. When I submitted the patch to the list, he tested it, but it didn't work for him, so the patch was never accepted. Maybe about 3 times in the past year, I've tried to email the guy, to see if he couldn't run my new version, complete with debug code to diagnose the problem he was having. He never got back to me. So, I'm attaching the patch. I wish I knew why it didn't work for him, but I've been using it for the last year with no problems. Let me know if you need any more information, or have any ideas as to how I could test it. I'd like to see it in the tree, but I want to make sure it works. -Chris
author Sam Lantinga <slouken@libsdl.org>
date Sun, 19 Mar 2006 06:31:34 +0000
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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3692456e7b0f Use SDL_ prefixed versions of C library functions.
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5 This library is SDL_free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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24 /* WAVE files are little-endian */
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26 /*******************************************/
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27 /* Define values for Microsoft WAVE format */
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28 /*******************************************/
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29 #define RIFF 0x46464952 /* "RIFF" */
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30 #define WAVE 0x45564157 /* "WAVE" */
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31 #define FACT 0x74636166 /* "fact" */
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32 #define LIST 0x5453494c /* "LIST" */
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33 #define FMT 0x20746D66 /* "fmt " */
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34 #define DATA 0x61746164 /* "data" */
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35 #define PCM_CODE 0x0001
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36 #define MS_ADPCM_CODE 0x0002
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37 #define IMA_ADPCM_CODE 0x0011
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38 #define WAVE_MONO 1
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39 #define WAVE_STEREO 2
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40
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41 /* Normally, these three chunks come consecutively in a WAVE file */
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42 typedef struct WaveFMT {
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43 /* Not saved in the chunk we read:
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44 Uint32 FMTchunk;
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45 Uint32 fmtlen;
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46 */
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47 Uint16 encoding;
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48 Uint16 channels; /* 1 = mono, 2 = stereo */
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49 Uint32 frequency; /* One of 11025, 22050, or 44100 Hz */
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50 Uint32 byterate; /* Average bytes per second */
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51 Uint16 blockalign; /* Bytes per sample block */
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52 Uint16 bitspersample; /* One of 8, 12, 16, or 4 for ADPCM */
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53 } WaveFMT;
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54
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55 /* The general chunk found in the WAVE file */
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56 typedef struct Chunk {
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57 Uint32 magic;
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58 Uint32 length;
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59 Uint8 *data;
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60 } Chunk;
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