avtools: parse loglevel before all the other options.

This way it can be applied to cmdutils too -- e.g. showing the banner
and printing startup messages.

avconv.c

@@ -4019,6 +4019,7 @@ int main(int argc, char **argv)
     reset_options(&o);
 
     av_log_set_flags(AV_LOG_SKIP_REPEATED);
+    parse_loglevel(argc, argv, options);
 
     avcodec_register_all();
 #if CONFIG_AVDEVICE

avplay.c

@@ -3050,6 +3050,7 @@ int main(int argc, char **argv)
     int flags;
 
     av_log_set_flags(AV_LOG_SKIP_REPEATED);
+    parse_loglevel(argc, argv, options);
 
     /* register all codecs, demux and protocols */
     avcodec_register_all();

avprobe.c

@@ -399,6 +399,7 @@ int main(int argc, char **argv)
 {
     int ret;
 
+    parse_loglevel(argc, argv, options);
     av_register_all();
     init_opts();
 #if CONFIG_AVDEVICE

avserver.c

@@ -4668,6 +4668,7 @@ int main(int argc, char **argv)
 {
     struct sigaction sigact;
 
+    parse_loglevel(argc, argv, options);
     av_register_all();
 
     show_banner();

cmdutils.c

@@ -304,6 +304,41 @@ void parse_options(void *optctx, int argc, char **argv, const OptionDef *options
     }
 }
 
+/*
+ * Return index of option opt in argv or 0 if not found.
+ */
+static int locate_option(int argc, char **argv, const OptionDef *options, const char *optname)
+{
+    const OptionDef *po;
+    int i;
+
+    for (i = 1; i < argc; i++) {
+        const char *cur_opt = argv[i];
+
+        if (*cur_opt++ != '-')
+            continue;
+
+        po = find_option(options, cur_opt);
+        if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
+            po = find_option(options, cur_opt + 2);
+
+        if ((!po->name && !strcmp(cur_opt, optname)) ||
+             (po->name && !strcmp(optname, po->name)))
+            return i;
+
+        if (!po || po->flags & HAS_ARG)
+            i++;
+    }
+    return 0;
+}
+
+void parse_loglevel(int argc, char **argv, const OptionDef *options)
+{
+    int idx = locate_option(argc, argv, options, "loglevel");
+    if (idx && argv[idx + 1])
+        opt_loglevel("loglevel", argv[idx + 1]);
+}
+
 #define FLAGS (o->type == FF_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
 int opt_default(const char *opt, const char *arg)
 {

cmdutils.h

@@ -174,6 +174,11 @@ void parse_options(void *optctx, int argc, char **argv, const OptionDef *options
  */
 int parse_option(void *optctx, const char *opt, const char *arg, const OptionDef *options);
 
+/**
+ * Find the '-loglevel' option in the commandline args and apply it.
+ */
+void parse_loglevel(int argc, char **argv, const OptionDef *options);
+
 /**
  * Check if the given stream matches a stream specifier.
  *

ffmpeg.c

@@ -4357,6 +4357,7 @@ int main(int argc, char **argv)
     int64_t ti;
 
     av_log_set_flags(AV_LOG_SKIP_REPEATED);
+    parse_loglevel(argc, argv, options);
 
     avcodec_register_all();
 #if CONFIG_AVDEVICE