matroskadec: don't remove dummy level when none was added

Originally committed as revision 13657 to svn://svn.ffmpeg.org/ffmpeg/trunk
17 years ago · fc4738ae96
parent d9e5c9b718
commit fc4738ae96
1 changed files with 3 additions and 0 deletions
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@ -1888,6 +1888,7 @@ matroska_parse_seekhead (MatroskaDemuxContext *matroska)
            case MATROSKA_ID_SEEKENTRY: {
                uint32_t seek_id = 0, peek_id_cache = 0;
                uint64_t seek_pos = (uint64_t) -1, t;
+                int dummy_level = 0;

                if ((res = ebml_read_master(matroska, &id)) < 0)
                    break;
@ -1964,6 +1965,7 @@ matroska_parse_seekhead (MatroskaDemuxContext *matroska)
                        level.length = (uint64_t)-1;
                        matroska->levels[matroska->num_levels] = level;
                        matroska->num_levels++;
+                        dummy_level = 1;

                        /* check ID */
                        if (!(id = ebml_peek_id (matroska,
@ -2000,6 +2002,7 @@ matroska_parse_seekhead (MatroskaDemuxContext *matroska)

                    finish:
                        /* remove dummy level */
+                        if (dummy_level)
                        while (matroska->num_levels) {
                            matroska->num_levels--;
                            length =