From f0ccd53a3b0bbe704a7bc94dbc8caac7be81e079 Mon Sep 17 00:00:00 2001 From: Diego Biurrun Date: Mon, 30 Apr 2012 16:44:31 +0200 Subject: tests: Refactor rotozoom/videogen common code into a separate file. --- tests/utils.c | 144 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 tests/utils.c (limited to 'tests/utils.c') diff --git a/tests/utils.c b/tests/utils.c new file mode 100644 index 0000000000..2a85bd8e06 --- /dev/null +++ b/tests/utils.c @@ -0,0 +1,144 @@ +/* + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include + +#define SCALEBITS 8 +#define ONE_HALF (1 << (SCALEBITS - 1)) +#define FIX(x) ((int) ((x) * (1L << SCALEBITS) + 0.5)) + +static void rgb24_to_yuv420p(unsigned char *lum, unsigned char *cb, + unsigned char *cr, unsigned char *src, + int width, int height) +{ + int wrap, wrap3, x, y; + int r, g, b, r1, g1, b1; + unsigned char *p; + + wrap = width; + wrap3 = width * 3; + p = src; + for (y = 0; y < height; y += 2) { + for (x = 0; x < width; x += 2) { + r = p[0]; + g = p[1]; + b = p[2]; + r1 = r; + g1 = g; + b1 = b; + lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + + FIX(0.11400) * b + ONE_HALF) >> SCALEBITS; + r = p[3]; + g = p[4]; + b = p[5]; + r1 += r; + g1 += g; + b1 += b; + lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + + FIX(0.11400) * b + ONE_HALF) >> SCALEBITS; + p += wrap3; + lum += wrap; + + r = p[0]; + g = p[1]; + b = p[2]; + r1 += r; + g1 += g; + b1 += b; + lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + + FIX(0.11400) * b + ONE_HALF) >> SCALEBITS; + r = p[3]; + g = p[4]; + b = p[5]; + r1 += r; + g1 += g; + b1 += b; + lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + + FIX(0.11400) * b + ONE_HALF) >> SCALEBITS; + + cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + + FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128; + cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 - + FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128; + + cb++; + cr++; + p += -wrap3 + 2 * 3; + lum += -wrap + 2; + } + p += wrap3; + lum += wrap; + } +} + +/* cif format */ +#define DEFAULT_WIDTH 352 +#define DEFAULT_HEIGHT 288 +#define DEFAULT_NB_PICT 50 + +static void pgmyuv_save(const char *filename, int w, int h, + unsigned char *rgb_tab) +{ + FILE *f; + int i, h2, w2; + unsigned char *cb, *cr; + unsigned char *lum_tab, *cb_tab, *cr_tab; + + lum_tab = malloc(w * h); + cb_tab = malloc(w * h / 4); + cr_tab = malloc(w * h / 4); + + rgb24_to_yuv420p(lum_tab, cb_tab, cr_tab, rgb_tab, w, h); + + f = fopen(filename, "wb"); + fprintf(f, "P5\n%d %d\n%d\n", w, h * 3 / 2, 255); + fwrite(lum_tab, 1, w * h, f); + h2 = h / 2; + w2 = w / 2; + cb = cb_tab; + cr = cr_tab; + for (i = 0; i < h2; i++) { + fwrite(cb, 1, w2, f); + fwrite(cr, 1, w2, f); + cb += w2; + cr += w2; + } + fclose(f); + + free(lum_tab); + free(cb_tab); + free(cr_tab); +} + +static unsigned char *rgb_tab; +static int width, height, wrap; + +static void put_pixel(int x, int y, int r, int g, int b) +{ + unsigned char *p; + + if (x < 0 || x >= width || + y < 0 || y >= height) + return; + + p = rgb_tab + y * wrap + x * 3; + p[0] = r; + p[1] = g; + p[2] = b; +} -- cgit v1.2.3