cmdutils: change the signature of the function argument in parse_options()

This is required for a pending simplification.

cmdutils.c

@@ -217,7 +217,7 @@ static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
 #endif /* WIN32 && !__MINGW32CE__ */
 
 void parse_options(int argc, char **argv, const OptionDef *options,
-                   void (* parse_arg_function)(const char*))
+                   int (* parse_arg_function)(const char *opt, const char *arg))
 {
     const char *opt, *arg;
     int optindex, handleoptions=1;
@@ -284,8 +284,10 @@ unknown_opt:
             if(po->flags & OPT_EXIT)
                 exit(0);
         } else {
-            if (parse_arg_function)
+            if (parse_arg_function) {
-                parse_arg_function(opt);
+                if (parse_arg_function(NULL, opt) < 0)
+                    exit(1);
+            }
         }
     }
 }

cmdutils.h

@@ -151,7 +151,7 @@ void show_help_options(const OptionDef *options, const char *msg, int mask, int
  * not have to be processed.
  */
 void parse_options(int argc, char **argv, const OptionDef *options,
-                   void (* parse_arg_function)(const char*));
+                   int (* parse_arg_function)(const char *opt, const char *arg));
 
 void set_context_opts(void *ctx, void *opts_ctx, int flags, AVCodec *codec);
 

ffmpeg.c

@@ -3855,7 +3855,7 @@ static int opt_streamid(const char *opt, const char *arg)
     return 0;
 }
 
-static void opt_output_file(const char *filename)
+static int opt_output_file(const char *opt, const char *filename)
 {
     AVFormatContext *oc;
     int err, use_video, use_audio, use_subtitle, use_data;
@@ -3984,6 +3984,7 @@ static void opt_output_file(const char *filename)
     av_freep(&forced_key_frames);
     uninit_opts();
     init_opts();
+    return 0;
 }
 
 /* same option as mencoder */

ffplay.c

@@ -3006,7 +3006,7 @@ static void show_help(void)
            );
 }
 
-static void opt_input_file(const char *filename)
+static int opt_input_file(const char *opt, const char *filename)
 {
     if (input_filename) {
         fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
@@ -3016,6 +3016,7 @@ static void opt_input_file(const char *filename)
     if (!strcmp(filename, "-"))
         filename = "pipe:";
     input_filename = filename;
+    return 0;
 }
 
 /* Called from the main */

ffprobe.c

@@ -339,7 +339,7 @@ static int opt_format(const char *opt, const char *arg)
     return 0;
 }
 
-static void opt_input_file(const char *arg)
+static int opt_input_file(const char *opt, const char *arg)
 {
     if (input_filename) {
         fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
@@ -349,6 +349,7 @@ static void opt_input_file(const char *arg)
     if (!strcmp(arg, "-"))
         arg = "pipe:";
     input_filename = arg;
+    return 0;
 }
 
 static void show_help(void)