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annotate src/thread/SDL_thread_c.h @ 3880:74e828c64315 SDL-1.2

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Fixed bug #292 I might be on crack here. It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and right channels of a stereo stream together, and clamps the new mono channel if it would overflow. Shouldn't it be dividing by 2 to average the two sample points instead of clamping? Otherwise the mono sample point's volume doubles in the conversion. This would also make the conversion faster, as it replaces two branches per sample frame with a bitwise shift. --ryan.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 24 Sep 2006 15:45:37 +0000
parents d910939febfa
children 782fd950bd46 c121d94672cb 6d2e1961661a
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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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5 This library is 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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14
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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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23
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24 #ifndef _SDL_thread_c_h
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25 #define _SDL_thread_c_h
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26
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27 /* Need the definitions of SYS_ThreadHandle */
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28 #if SDL_THREADS_DISABLED
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29 #include "generic/SDL_systhread_c.h"
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30 #elif SDL_THREAD_AMIGA
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31 #include "amigaos/SDL_systhread_c.h"
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32 #elif SDL_THREAD_BEOS
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33 #include "beos/SDL_systhread_c.h"
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34 #elif SDL_THREAD_DC
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35 #include "dc/SDL_systhread_c.h"
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36 #elif SDL_THREAD_EPOC
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37 #include "epoc/SDL_systhread_c.h"
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38 #elif SDL_THREAD_OS2
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39 #include "os2/SDL_systhread_c.h"
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40 #elif SDL_THREAD_PTH
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41 #include "pth/SDL_systhread_c.h"
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42 #elif SDL_THREAD_PTHREAD
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43 #include "pthread/SDL_systhread_c.h"
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44 #elif SDL_THREAD_SPROC
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45 #include "irix/SDL_systhread_c.h"
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46 #elif SDL_THREAD_WIN32
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47 #include "win32/SDL_systhread_c.h"
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48 #else
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49 #error Need thread implementation for this platform
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50 #include "generic/SDL_systhread_c.h"
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51 #endif
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52 #include "../SDL_error_c.h"
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53
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54 /* This is the system-independent thread info structure */
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55 struct SDL_Thread {
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56 Uint32 threadid;
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57 SYS_ThreadHandle handle;
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58 int status;
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59 SDL_error errbuf;
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60 void *data;
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61 };
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62
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63 /* This is the function called to run a thread */
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64 extern void SDL_RunThread(void *data);
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65
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66 #endif /* _SDL_thread_c_h */