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-rw-r--r--video/out/pnm_loader.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/video/out/pnm_loader.c b/video/out/pnm_loader.c
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+++ b/video/out/pnm_loader.c
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+/*
+ * PNM image files loader
+ *
+ * copyleft (C) 2005-2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer 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.
+ *
+ * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * You can alternatively redistribute this file 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.
+ */
+
+/**
+ * \file pnm_loader.c
+ * \brief PNM image files loader
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <ctype.h>
+#include "pnm_loader.h"
+
+/**
+ * \brief skips whitespace and comments
+ * \param f file to read from
+ */
+static void ppm_skip(FILE *f) {
+ int c, comment = 0;
+ do {
+ c = fgetc(f);
+ if (c == '#')
+ comment = 1;
+ if (c == '\n')
+ comment = 0;
+ } while (c != EOF && (isspace(c) || comment));
+ if (c != EOF)
+ ungetc(c, f);
+}
+
+#define MAXDIM (16 * 1024)
+
+uint8_t *read_pnm(FILE *f, int *width, int *height,
+ int *bytes_per_pixel, int *maxval) {
+ uint8_t *data;
+ int type;
+ unsigned w, h, m, val, bpp;
+ *width = *height = *bytes_per_pixel = *maxval = 0;
+ ppm_skip(f);
+ if (fgetc(f) != 'P')
+ return NULL;
+ type = fgetc(f);
+ if (type != '5' && type != '6')
+ return NULL;
+ ppm_skip(f);
+ if (fscanf(f, "%u", &w) != 1)
+ return NULL;
+ ppm_skip(f);
+ if (fscanf(f, "%u", &h) != 1)
+ return NULL;
+ ppm_skip(f);
+ if (fscanf(f, "%u", &m) != 1)
+ return NULL;
+ val = fgetc(f);
+ if (!isspace(val))
+ return NULL;
+ if (w > MAXDIM || h > MAXDIM)
+ return NULL;
+ bpp = (m > 255) ? 2 : 1;
+ if (type == '6')
+ bpp *= 3;
+ data = malloc(w * h * bpp);
+ if (fread(data, w * bpp, h, f) != h) {
+ free(data);
+ return NULL;
+ }
+ *width = w;
+ *height = h;
+ *bytes_per_pixel = bpp;
+ *maxval = m;
+ return data;
+}