avformat: Constify all muxer/demuxers

[ffmpeg] / libavformat / realtextdec.c

diff --git a/libavformat/realtextdec.c b/libavformat/realtextdec.c
index e12871e6ad5255bf50d7d4dbcc61f90a7f527b97..22fc58bc99846a208ca681c358420ed706e1a1fc 100644 (file)
--- a/libavformat/realtextdec.c
+++ b/libavformat/realtextdec.c
@@ -45,16 +45,16 @@ static int realtext_probe(const AVProbeData *p)
     return !av_strncasecmp(buf, "<window", 7) ? AVPROBE_SCORE_EXTENSION : 0;
 }
 
-static int read_ts(const char *s)
+static int64_t read_ts(const char *s)
 {
     int hh, mm, ss, ms;
 
-    if (sscanf(s, "%u:%u:%u.%u", &hh, &mm, &ss, &ms) == 4) return (hh*3600 + mm*60 + ss) * 100 + ms;
-    if (sscanf(s, "%u:%u:%u"   , &hh, &mm, &ss     ) == 3) return (hh*3600 + mm*60 + ss) * 100;
-    if (sscanf(s,    "%u:%u.%u",      &mm, &ss, &ms) == 3) return (          mm*60 + ss) * 100 + ms;
-    if (sscanf(s,    "%u:%u"   ,      &mm, &ss     ) == 2) return (          mm*60 + ss) * 100;
-    if (sscanf(s,       "%u.%u",           &ss, &ms) == 2) return (                  ss) * 100 + ms;
-    return strtol(s, NULL, 10) * 100;
+    if (sscanf(s, "%u:%u:%u.%u", &hh, &mm, &ss, &ms) == 4) return (hh*3600LL + mm*60LL + ss) * 100LL + ms;
+    if (sscanf(s, "%u:%u:%u"   , &hh, &mm, &ss     ) == 3) return (hh*3600LL + mm*60LL + ss) * 100LL;
+    if (sscanf(s,    "%u:%u.%u",      &mm, &ss, &ms) == 3) return (            mm*60LL + ss) * 100LL + ms;
+    if (sscanf(s,    "%u:%u"   ,      &mm, &ss     ) == 2) return (            mm*60LL + ss) * 100LL;
+    if (sscanf(s,       "%u.%u",           &ss, &ms) == 2) return (                      ss) * 100LL + ms;
+    return strtoll(s, NULL, 10) * 100ULL;
 }
 
 static int realtext_read_header(AVFormatContext *s)
@@ -87,6 +87,10 @@ static int realtext_read_header(AVFormatContext *s)
             /* save header to extradata */
             const char *p = ff_smil_get_attr_ptr(buf.str, "duration");
 
+            if (st->codecpar->extradata) {
+                res = AVERROR_INVALIDDATA;
+                goto end;
+            }
             if (p)
                 duration = read_ts(p);
             st->codecpar->extradata = av_strdup(buf.str);
@@ -119,6 +123,8 @@ static int realtext_read_header(AVFormatContext *s)
 
 end:
     av_bprint_finalize(&buf, NULL);
+    if (res < 0)
+        ff_subtitles_queue_clean(&rt->q);
     return res;
 }
 
@@ -143,7 +149,7 @@ static int realtext_read_close(AVFormatContext *s)
     return 0;
 }
 
-AVInputFormat ff_realtext_demuxer = {
+const AVInputFormat ff_realtext_demuxer = {
     .name           = "realtext",
     .long_name      = NULL_IF_CONFIG_SMALL("RealText subtitle format"),
     .priv_data_size = sizeof(RealTextContext),