mirror of https://github.com/FFmpeg/FFmpeg.git
* qatar/master: tests: Refactor rotozoom/videogen common code into a separate file. tests: Mark some file-internal symbols as static. build: Drop leftover .exp pattern from LIBSUFFIXES list. vsrc_buffer: return EAGAIN if no frame is available. WMAL: Shift output samples by the specified number of padding zeroes. WMAL: Restore removed code in mclms_predict() rtpdec_h264: Remove a useless ifdef rtpdec_h264: Remove outdated/useless/incorrect comments rtpdec_h264: Remove useless memory corruption checks rtpdec_h264: Return proper error codes rtpdec_h264: Check the available data length before reading rtpdec_h264: Add input size checks png: check bit depth for PAL8/Y400A pixel formats. ea: check chunk_size for validity. celp filters: Do not read earlier than the start of the 'out' vector. Conflicts: libavcodec/pngdec.c libavfilter/src_buffer.c tests/rotozoom.c Merged-by: Michael Niedermayer <michaelni@gmx.at>pull/30/merge
Michael Niedermayer
13 years ago
commit
517dcc9b5f
10 changed files with 196 additions and 321 deletions
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/*
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* copyright (c) Sebastien Bechet <s.bechet@av7.net> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#define SCALEBITS 8 |
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#define ONE_HALF (1 << (SCALEBITS - 1)) |
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#define FIX(x) ((int) ((x) * (1L << SCALEBITS) + 0.5)) |
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static void rgb24_to_yuv420p(unsigned char *lum, unsigned char *cb, |
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unsigned char *cr, unsigned char *src, |
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int width, int height) |
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{ |
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int wrap, wrap3, x, y; |
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int r, g, b, r1, g1, b1; |
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unsigned char *p; |
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wrap = width; |
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wrap3 = width * 3; |
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p = src; |
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for (y = 0; y < height; y += 2) { |
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for (x = 0; x < width; x += 2) { |
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r = p[0]; |
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g = p[1]; |
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b = p[2]; |
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r1 = r; |
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g1 = g; |
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b1 = b; |
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lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + |
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS; |
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r = p[3]; |
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g = p[4]; |
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b = p[5]; |
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r1 += r; |
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g1 += g; |
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b1 += b; |
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lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + |
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS; |
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p += wrap3; |
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lum += wrap; |
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r = p[0]; |
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g = p[1]; |
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b = p[2]; |
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r1 += r; |
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g1 += g; |
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b1 += b; |
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lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + |
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS; |
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r = p[3]; |
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g = p[4]; |
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b = p[5]; |
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r1 += r; |
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g1 += g; |
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b1 += b; |
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lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + |
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS; |
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cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + |
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FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128; |
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cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 - |
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FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128; |
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cb++; |
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cr++; |
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p += -wrap3 + 2 * 3; |
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lum += -wrap + 2; |
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} |
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p += wrap3; |
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lum += wrap; |
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} |
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} |
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/* cif format */ |
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#define DEFAULT_WIDTH 352 |
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#define DEFAULT_HEIGHT 288 |
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#define DEFAULT_NB_PICT 50 |
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static void pgmyuv_save(const char *filename, int w, int h, |
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unsigned char *rgb_tab) |
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{ |
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FILE *f; |
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int i, h2, w2; |
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unsigned char *cb, *cr; |
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unsigned char *lum_tab, *cb_tab, *cr_tab; |
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lum_tab = malloc(w * h); |
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cb_tab = malloc(w * h / 4); |
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cr_tab = malloc(w * h / 4); |
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rgb24_to_yuv420p(lum_tab, cb_tab, cr_tab, rgb_tab, w, h); |
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f = fopen(filename, "wb"); |
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fprintf(f, "P5\n%d %d\n%d\n", w, h * 3 / 2, 255); |
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fwrite(lum_tab, 1, w * h, f); |
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h2 = h / 2; |
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w2 = w / 2; |
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cb = cb_tab; |
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cr = cr_tab; |
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for (i = 0; i < h2; i++) { |
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fwrite(cb, 1, w2, f); |
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fwrite(cr, 1, w2, f); |
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cb += w2; |
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cr += w2; |
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} |
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fclose(f); |
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free(lum_tab); |
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free(cb_tab); |
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free(cr_tab); |
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} |
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static unsigned char *rgb_tab; |
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static int width, height, wrap; |
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static void put_pixel(int x, int y, int r, int g, int b) |
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{ |
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unsigned char *p; |
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if (x < 0 || x >= width || |
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y < 0 || y >= height) |
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return; |
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p = rgb_tab + y * wrap + x * 3; |
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p[0] = r; |
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p[1] = g; |
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p[2] = b; |
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} |
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