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annotate src/video/wscons/SDL_wsconsvideo.h @ 2661:d38309be5178 gsoc2008_audio_resampling

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The windowed sinc filter generation code seems to be working fine. The FIR filtering code is also now working reasonably well. Occasionally the FIR filter will pop, but setting the normalization factor lower seems to help this. I suspect the problem is in the fixed point multiply/add. I also have a hunch the zero stuffing/sample discarding code is not correct, and I'll look at that soon to get it sorted out.
author Aaron Wishnick <schnarf@gmail.com>
date Wed, 02 Jul 2008 08:04:50 +0000
parents c121d94672cb
children 99210400e8b9
rev   line source
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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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18
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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_wsconsvideo_h
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25 #define _SDL_wsconsvideo_h
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26
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27 #include <sys/time.h>
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28 #include <termios.h>
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29 #include <dev/wscons/wsconsio.h>
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30
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31 #include "SDL_mouse.h"
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32 #include "SDL_mutex.h"
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33 #include "../SDL_sysvideo.h"
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34
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35 void WSCONS_ReportError(char *fmt, ...);
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36
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37 /* Hidden "this" pointer for the video functions */
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38 #define _THIS SDL_VideoDevice *this
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39 #define private (this->hidden)
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40
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41 /* Private display data */
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42
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43 typedef void WSCONS_bitBlit(Uint8 * src_pos, int srcRightDelta, // pixels, not bytes
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44 int srcDownDelta, // pixels, not bytes
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45 Uint8 * dst_pos,
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46 int dst_linebytes, int width, int height);
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47
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48 struct SDL_PrivateVideoData
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49 {
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50 int fd; /* file descriptor of open device */
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51 struct wsdisplay_fbinfo info; /* frame buffer characteristics */
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52 int physlinebytes; /* number of bytes per row */
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53 int redMask, greenMask, blueMask;
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54
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55 Uint8 *fbstart; /* These refer to the surface used, */
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56 int fblinebytes; /* physical frame buffer or shadow. */
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57
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58 size_t fbmem_len;
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59 Uint8 *physmem;
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60 Uint8 *shadowmem;
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61 int rotate;
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62 int shadowFB; /* Tells whether a shadow is being used. */
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63
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64 WSCONS_bitBlit *blitFunc;
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65
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66 SDL_Rect *SDL_modelist[2];
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67
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68 unsigned int kbdType;
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69 int did_save_tty;
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70 struct termios saved_tty;
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71 };
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74 #endif /* _SDL_wsconsvideo_h */
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75 /* vi: set ts=4 sw=4 expandtab: */