added ffplay utility

Originally committed as revision 1936 to svn://svn.ffmpeg.org/ffmpeg/trunk

cmdutils.c

@@ -0,0 +1,120 @@
+/*
+ * Various utilities for command line tools
+ * Copyright (c) 2000-2003 Fabrice Bellard
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "common.h"
+#include "avformat.h"
+
+#include "cmdutils.h"
+
+void show_help_options(const OptionDef *options)
+{
+    const OptionDef *po;
+    int i, expert, first;
+
+    printf("Main options are:\n");
+    for(i=0;i<2;i++) {
+        first = 1;
+        for(po = options; po->name != NULL; po++) {
+            char buf[64];
+            expert = (po->flags & OPT_EXPERT) != 0;
+            if (expert == i) {
+                if (expert && first) {
+                    printf("\nAdvanced options are:\n");
+                    first = 0;
+                }
+                strcpy(buf, po->name);
+                if (po->flags & HAS_ARG) {
+                    strcat(buf, " ");
+                    strcat(buf, po->argname);
+                }
+                printf("-%-17s  %s\n", buf, po->help);
+            }
+        }
+    }
+}
+
+void parse_options(int argc, char **argv, const OptionDef *options)
+{
+    const char *opt, *arg;
+    int optindex;
+    const OptionDef *po;
+
+    /* parse options */
+    optindex = 1;
+    while (optindex < argc) {
+        opt = argv[optindex++];
+        
+        if (opt[0] == '-' && opt[1] != '\0') {
+            po = options;
+            while (po->name != NULL) {
+                if (!strcmp(opt + 1, po->name))
+                    break;
+                po++;
+            }
+            if (!po->name) {
+                fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
+                exit(1);
+            }
+            arg = NULL;
+            if (po->flags & HAS_ARG) {
+                arg = argv[optindex++];
+                if (!arg) {
+                    fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
+                    exit(1);
+                }
+            }
+            if (po->flags & OPT_STRING) {
+                char *str;
+                str = strdup(arg);
+                *po->u.str_arg = str;
+            } else if (po->flags & OPT_BOOL) {
+                *po->u.int_arg = 1;
+            } else {
+		po->u.func_arg(arg);
+            }
+        } else {
+            parse_arg_file(opt);
+        }
+    }
+}
+
+void print_error(const char *filename, int err)
+{
+    switch(err) {
+    case AVERROR_NUMEXPECTED:
+        fprintf(stderr, "%s: Incorrect image filename syntax.\n"
+                "Use '%%d' to specify the image number:\n"
+                "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
+                "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n", 
+                filename);
+        break;
+    case AVERROR_INVALIDDATA:
+        fprintf(stderr, "%s: Error while parsing header\n", filename);
+        break;
+    case AVERROR_NOFMT:
+        fprintf(stderr, "%s: Unknown format\n", filename);
+        break;
+    default:
+        fprintf(stderr, "%s: Error while opening file\n", filename);
+        break;
+    }
+}