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Diffstat (limited to 'libmpdemux/yuv4mpeg_ratio.c')
-rw-r--r-- | libmpdemux/yuv4mpeg_ratio.c | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/libmpdemux/yuv4mpeg_ratio.c b/libmpdemux/yuv4mpeg_ratio.c deleted file mode 100644 index be5475c1b1..0000000000 --- a/libmpdemux/yuv4mpeg_ratio.c +++ /dev/null @@ -1,112 +0,0 @@ -/* - * yuv4mpeg_ratio.c: Functions for dealing with y4m_ratio_t datatype. - * - * Copyright (C) 2001 Matthew J. Marjanovic <maddog@mir.com> - * - * This file is part of the MJPEG Tools package (mjpeg.sourceforge.net). - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - */ - -#include "config.h" - -#include <string.h> -#include "yuv4mpeg.h" -#include "yuv4mpeg_intern.h" - - -/* useful list of standard framerates */ -const y4m_ratio_t y4m_fps_UNKNOWN = Y4M_FPS_UNKNOWN; -const y4m_ratio_t y4m_fps_NTSC_FILM = Y4M_FPS_NTSC_FILM; -const y4m_ratio_t y4m_fps_FILM = Y4M_FPS_FILM; -const y4m_ratio_t y4m_fps_PAL = Y4M_FPS_PAL; -const y4m_ratio_t y4m_fps_NTSC = Y4M_FPS_NTSC; -const y4m_ratio_t y4m_fps_30 = Y4M_FPS_30; -const y4m_ratio_t y4m_fps_PAL_FIELD = Y4M_FPS_PAL_FIELD; -const y4m_ratio_t y4m_fps_NTSC_FIELD = Y4M_FPS_NTSC_FIELD; -const y4m_ratio_t y4m_fps_60 = Y4M_FPS_60; - -/* useful list of standard pixel aspect ratios */ -const y4m_ratio_t y4m_sar_UNKNOWN = Y4M_SAR_UNKNOWN; -const y4m_ratio_t y4m_sar_SQUARE = Y4M_SAR_SQUARE; -const y4m_ratio_t y4m_sar_NTSC_CCIR601 = Y4M_SAR_NTSC_CCIR601; -const y4m_ratio_t y4m_sar_NTSC_16_9 = Y4M_SAR_NTSC_16_9; -const y4m_ratio_t y4m_sar_NTSC_SVCD_4_3 = Y4M_SAR_NTSC_SVCD_4_3; -const y4m_ratio_t y4m_sar_NTSC_SVCD_16_9 = Y4M_SAR_NTSC_SVCD_16_9; -const y4m_ratio_t y4m_sar_PAL_CCIR601 = Y4M_SAR_PAL_CCIR601; -const y4m_ratio_t y4m_sar_PAL_16_9 = Y4M_SAR_PAL_16_9; -const y4m_ratio_t y4m_sar_PAL_SVCD_4_3 = Y4M_SAR_PAL_SVCD_4_3; -const y4m_ratio_t y4m_sar_PAL_SVCD_16_9 = Y4M_SAR_PAL_SVCD_16_9; - - -/* - * Euler's algorithm for greatest common divisor - */ - -static int gcd(int a, int b) -{ - a = (a >= 0) ? a : -a; - b = (b >= 0) ? b : -b; - - while (b > 0) { - int x = b; - b = a % b; - a = x; - } - return a; -} - - -/************************************************************************* - * - * Remove common factors from a ratio - * - *************************************************************************/ - - -void y4m_ratio_reduce(y4m_ratio_t *r) -{ - int d; - if ((r->n == 0) && (r->d == 0)) return; /* "unknown" */ - d = gcd(r->n, r->d); - r->n /= d; - r->d /= d; -} - - - -/************************************************************************* - * - * Parse "nnn:ddd" into a ratio - * - * returns: Y4M_OK - success - * Y4M_ERR_RANGE - range error - * - *************************************************************************/ - -int y4m_parse_ratio(y4m_ratio_t *r, const char *s) -{ - char *t = strchr(s, ':'); - - if (t == NULL) return Y4M_ERR_RANGE; - r->n = atoi(s); - r->d = atoi(t+1); - if (r->d < 0) return Y4M_ERR_RANGE; - /* 0:0 == unknown, so that is ok, otherwise zero denominator is bad */ - if ((r->d == 0) && (r->n != 0)) return Y4M_ERR_RANGE; - y4m_ratio_reduce(r); - return Y4M_OK; -} |