fftools/ffmpeg_mux_init: Cleanup on error return in set_dispositions()

Fixes: CID1539099 Resource leak

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

fftools/ffmpeg.h

@@ -865,7 +865,7 @@ void update_benchmark(const char *fmt, ...);
            namestr, st->index, o->optname.opt_canon->name, spec[0] ? ":" : "", spec, so->u.type);\
 }
 
-#define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
+#define MATCH_PER_STREAM_OPT_CLEAN(name, type, outvar, fmtctx, st, clean)\
 {\
     int _ret, _matches = 0, _match_idx;\
     for (int _i = 0; _i < o->name.nb_opt; _i++) {\
@@ -875,12 +875,17 @@ void update_benchmark(const char *fmt, ...);
             _match_idx = _i;\
             _matches++;\
         } else if (_ret < 0)\
-            return _ret;\
+            clean;\
     }\
     if (_matches > 1 && o->name.opt_canon)\
        WARN_MULTIPLE_OPT_USAGE(name, type, _match_idx, st);\
 }
 
+#define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
+{\
+    MATCH_PER_STREAM_OPT_CLEAN(name, type, outvar, fmtctx, st, return _ret)\
+}
+
 const char *opt_match_per_type_str(const SpecifierOptList *sol,
                                    char mediatype);
 

fftools/ffmpeg_mux_init.c

@@ -2933,7 +2933,7 @@ static int set_dispositions(Muxer *mux, const OptionsContext *o)
 
         nb_streams[ost->type + 1]++;
 
-        MATCH_PER_STREAM_OPT(disposition, str, dispositions[i], ctx, ost->st);
+        MATCH_PER_STREAM_OPT_CLEAN(disposition, str, dispositions[i], ctx, ost->st, goto finish);
 
         have_manual |= !!dispositions[i];