avformat: Constify all muxer/demuxers

[ffmpeg] / libavformat / musx.c

diff --git a/libavformat/musx.c b/libavformat/musx.c
index aff6c31a86a22034810c6f5cdbcfcf1e739eae0a..fd5a9297f9b31650b76d16164570691d843db430 100644 (file)
--- a/libavformat/musx.c
+++ b/libavformat/musx.c
@@ -20,12 +20,23 @@
  */
 
 #include "libavutil/avassert.h"
+#include "libavutil/intreadwrite.h"
 #include "avformat.h"
 #include "internal.h"
 
-static int musx_probe(AVProbeData *p)
+static int musx_probe(const AVProbeData *p)
 {
-    if (memcmp(p->buf, "MUSX", 4))
+    unsigned version;
+
+    if (AV_RB32(p->buf) != MKBETAG('M','U','S','X'))
+        return 0;
+
+    version = AV_RL32(p->buf + 8);
+    if (version != 10 &&
+        version != 6 &&
+        version != 5 &&
+        version != 4 &&
+        version != 201)
         return 0;
 
     return AVPROBE_SCORE_MAX / 5 * 2;
@@ -167,7 +178,7 @@ static int musx_read_packet(AVFormatContext *s, AVPacket *pkt)
     return av_get_packet(s->pb, pkt, par->block_align);
 }
 
-AVInputFormat ff_musx_demuxer = {
+const AVInputFormat ff_musx_demuxer = {
     .name           = "musx",
     .long_name      = NULL_IF_CONFIG_SMALL("Eurocom MUSX"),
     .read_probe     = musx_probe,