bring in what was FLAC__seek_table_is_valid()
[flac.git] / src / libFLAC / metadata_object.c
index 50410fd..aa379fa 100644 (file)
@@ -456,6 +456,33 @@ FLAC__bool FLAC__metadata_object_seektable_delete_point(FLAC__StreamMetaData *ob
        return FLAC__metadata_object_seektable_resize_points(object, object->data.seek_table.num_points-1);
 }
 
+FLAC__bool FLAC__metadata_object_seektable_is_legal(const FLAC__StreamMetaData *object)
+{
+       unsigned i;
+       FLAC__uint64 last_sample_number = 0;
+       FLAC__bool got_last = false;
+
+       FLAC__ASSERT(0 != object);
+       FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE);
+
+       {
+               const FLAC__StreamMetaData_SeekTable *seek_table = &object->data.seek_table;
+
+               for(i = 0; i < seek_table->num_points; i++) {
+                       if(seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER) {
+                               if(got_last) {
+                                       if(seek_table->points[i].sample_number <= last_sample_number)
+                                               return false;
+                               }
+                               last_sample_number = seek_table->points[i].sample_number;
+                               got_last = true;
+                       }
+               }
+       }
+
+       return true;
+}
+
 FLAC__bool FLAC__metadata_object_vorbiscomment_set_vendor_string(FLAC__StreamMetaData *object, FLAC__StreamMetaData_VorbisComment_Entry entry, FLAC__bool copy)
 {
        return vorbiscomment_set_entry_(object, &object->data.vorbis_comment.vendor_string, &entry, copy);