Mercurial > sdl-ios-xcode
view test/testwin.c @ 2661:d38309be5178 gsoc2008_audio_resampling
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> |
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date | Wed, 02 Jul 2008 08:04:50 +0000 |
parents | c121d94672cb |
children | c4eccbd21d16 |
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/* Bring up a window and play with it */ #include <stdlib.h> #include <stdio.h> #include <string.h> #define BENCHMARK_SDL #define NOTICE(X) printf("%s", X); #include "SDL.h" /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ static void quit(int rc) { SDL_Quit(); exit(rc); } void DrawPict(SDL_Surface * screen, char *bmpfile, int speedy, int flip, int nofade) { SDL_Surface *picture; SDL_Rect dest, update; int i, centered; int ncolors; SDL_Color *colors, *cmap; /* Load the image into a surface */ if (bmpfile == NULL) { bmpfile = "sample.bmp"; /* Sample image */ } fprintf(stderr, "Loading picture: %s\n", bmpfile); picture = SDL_LoadBMP(bmpfile); if (picture == NULL) { fprintf(stderr, "Couldn't load %s: %s\n", bmpfile, SDL_GetError()); return; } /* Set the display colors -- on a hicolor display this is a no-op */ if (picture->format->palette) { ncolors = picture->format->palette->ncolors; colors = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color)); cmap = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color)); memcpy(colors, picture->format->palette->colors, ncolors * sizeof(SDL_Color)); } else { int r, g, b; /* Allocate 256 color palette */ ncolors = 256; colors = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color)); cmap = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color)); /* Set a 3,3,2 color cube */ for (r = 0; r < 8; ++r) { for (g = 0; g < 8; ++g) { for (b = 0; b < 4; ++b) { i = ((r << 5) | (g << 2) | b); colors[i].r = r << 5; colors[i].g = g << 5; colors[i].b = b << 6; } } } } NOTICE("testwin: setting colors\n"); if (!SDL_SetColors(screen, colors, 0, ncolors) && (screen->format->palette != NULL)) { fprintf(stderr, "Warning: Couldn't set all of the colors, but SDL will map the image\n" " (colormap fading will suffer - try the -warp option)\n"); } /* Set the screen to black (not really necessary) */ if (SDL_LockSurface(screen) == 0) { Uint32 black; Uint8 *pixels; black = SDL_MapRGB(screen->format, 0, 0, 0); pixels = (Uint8 *) screen->pixels; for (i = 0; i < screen->h; ++i) { memset(pixels, black, screen->w * screen->format->BytesPerPixel); pixels += screen->pitch; } SDL_UnlockSurface(screen); SDL_UpdateRect(screen, 0, 0, 0, 0); } /* Display the picture */ if (speedy) { SDL_Surface *displayfmt; fprintf(stderr, "Converting picture\n"); displayfmt = SDL_DisplayFormat(picture); if (displayfmt == NULL) { fprintf(stderr, "Couldn't convert image: %s\n", SDL_GetError()); goto done; } SDL_FreeSurface(picture); picture = displayfmt; } printf("(image surface located in %s memory)\n", (picture->flags & SDL_HWSURFACE) ? "video" : "system"); centered = (screen->w - picture->w) / 2; if (centered < 0) { centered = 0; } dest.y = (screen->h - picture->h) / 2; dest.w = picture->w; dest.h = picture->h; NOTICE("testwin: moving image\n"); for (i = 0; i <= centered; ++i) { dest.x = i; update = dest; if (SDL_BlitSurface(picture, NULL, screen, &update) < 0) { fprintf(stderr, "Blit failed: %s\n", SDL_GetError()); break; } if (flip) { SDL_Flip(screen); } else { SDL_UpdateRects(screen, 1, &update); } } #ifdef SCREENSHOT if (SDL_SaveBMP(screen, "screen.bmp") < 0) printf("Couldn't save screen: %s\n", SDL_GetError()); #endif #ifndef BENCHMARK_SDL /* Let it sit there for a while */ SDL_Delay(5 * 1000); #endif /* Fade the colormap */ if (!nofade) { int maxstep; SDL_Color final; SDL_Color palcolors[256]; struct { Sint16 r, g, b; } cdist[256]; NOTICE("testwin: fading out...\n"); memcpy(cmap, colors, ncolors * sizeof(SDL_Color)); maxstep = 32 - 1; final.r = 0xFF; final.g = 0x00; final.b = 0x00; memcpy(palcolors, colors, ncolors * sizeof(SDL_Color)); for (i = 0; i < ncolors; ++i) { cdist[i].r = final.r - palcolors[i].r; cdist[i].g = final.g - palcolors[i].g; cdist[i].b = final.b - palcolors[i].b; } for (i = 0; i <= maxstep / 2; ++i) { /* halfway fade */ int c; for (c = 0; c < ncolors; ++c) { colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep; colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep; colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep; } SDL_SetColors(screen, colors, 0, ncolors); SDL_Delay(1); } final.r = 0x00; final.g = 0x00; final.b = 0x00; memcpy(palcolors, colors, ncolors * sizeof(SDL_Color)); for (i = 0; i < ncolors; ++i) { cdist[i].r = final.r - palcolors[i].r; cdist[i].g = final.g - palcolors[i].g; cdist[i].b = final.b - palcolors[i].b; } maxstep /= 2; for (i = 0; i <= maxstep; ++i) { /* finish fade out */ int c; for (c = 0; c < ncolors; ++c) { colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep; colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep; colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep; } SDL_SetColors(screen, colors, 0, ncolors); SDL_Delay(1); } for (i = 0; i < ncolors; ++i) { colors[i].r = final.r; colors[i].g = final.g; colors[i].b = final.b; } SDL_SetColors(screen, colors, 0, ncolors); NOTICE("testwin: fading in...\n"); memcpy(palcolors, colors, ncolors * sizeof(SDL_Color)); for (i = 0; i < ncolors; ++i) { cdist[i].r = cmap[i].r - palcolors[i].r; cdist[i].g = cmap[i].g - palcolors[i].g; cdist[i].b = cmap[i].b - palcolors[i].b; } for (i = 0; i <= maxstep; ++i) { /* 32 step fade in */ int c; for (c = 0; c < ncolors; ++c) { colors[c].r = palcolors[c].r + ((cdist[c].r * i)) / maxstep; colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep; colors[c].b = palcolors[c].b + ((cdist[c].b * i)) / maxstep; } SDL_SetColors(screen, colors, 0, ncolors); SDL_Delay(1); } NOTICE("testwin: fading over\n"); } done: /* Free the picture and return */ SDL_FreeSurface(picture); free(colors); free(cmap); return; } int main(int argc, char *argv[]) { SDL_Surface *screen; /* Options */ int speedy, flip, nofade; int delay; int w, h; int desired_bpp; Uint32 video_flags; #ifdef BENCHMARK_SDL Uint32 then, now; #endif /* Set default options and check command-line */ speedy = 0; flip = 0; nofade = 0; delay = 1; #ifdef _WIN32_WCE w = 240; h = 320; desired_bpp = 8; video_flags = SDL_FULLSCREEN; #else w = 640; h = 480; desired_bpp = 0; video_flags = 0; #endif if (SDL_Init(SDL_INIT_VIDEO) < 0) { fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); return (1); } while (argc > 1) { if (strcmp(argv[1], "-speedy") == 0) { speedy = 1; argv += 1; argc -= 1; } else if (strcmp(argv[1], "-nofade") == 0) { nofade = 1; argv += 1; argc -= 1; } else if (strcmp(argv[1], "-delay") == 0) { if (argv[2]) { delay = atoi(argv[2]); argv += 2; argc -= 2; } else { fprintf(stderr, "The -delay option requires an argument\n"); quit(1); } } else if (strcmp(argv[1], "-width") == 0) { if (argv[2] && ((w = atoi(argv[2])) > 0)) { argv += 2; argc -= 2; } else { fprintf(stderr, "The -width option requires an argument\n"); quit(1); } } else if (strcmp(argv[1], "-height") == 0) { if (argv[2] && ((h = atoi(argv[2])) > 0)) { argv += 2; argc -= 2; } else { fprintf(stderr, "The -height option requires an argument\n"); quit(1); } } else if (strcmp(argv[1], "-bpp") == 0) { if (argv[2]) { desired_bpp = atoi(argv[2]); argv += 2; argc -= 2; } else { fprintf(stderr, "The -bpp option requires an argument\n"); quit(1); } } else if (strcmp(argv[1], "-warp") == 0) { video_flags |= SDL_HWPALETTE; argv += 1; argc -= 1; } else if (strcmp(argv[1], "-hw") == 0) { video_flags |= SDL_HWSURFACE; argv += 1; argc -= 1; } else if (strcmp(argv[1], "-flip") == 0) { video_flags |= SDL_DOUBLEBUF; argv += 1; argc -= 1; } else if (strcmp(argv[1], "-fullscreen") == 0) { video_flags |= SDL_FULLSCREEN; argv += 1; argc -= 1; } else break; } /* Initialize the display */ screen = SDL_SetVideoMode(w, h, desired_bpp, video_flags); if (screen == NULL) { fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n", w, h, desired_bpp, SDL_GetError()); quit(1); } printf("Set%s %dx%dx%d mode\n", screen->flags & SDL_FULLSCREEN ? " fullscreen" : "", screen->w, screen->h, screen->format->BitsPerPixel); printf("(video surface located in %s memory)\n", (screen->flags & SDL_HWSURFACE) ? "video" : "system"); if (screen->flags & SDL_DOUBLEBUF) { printf("Double-buffering enabled\n"); flip = 1; } /* Set the window manager title bar */ SDL_WM_SetCaption("SDL test window", "testwin"); /* Do all the drawing work */ #ifdef BENCHMARK_SDL then = SDL_GetTicks(); DrawPict(screen, argv[1], speedy, flip, nofade); now = SDL_GetTicks(); printf("Time: %d milliseconds\n", now - then); #else DrawPict(screen, argv[1], speedy, flip, nofade); #endif SDL_Delay(delay * 1000); SDL_Quit(); return (0); }