1 files changed, 62 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/nut.c b/contrib/ffmpeg/libavformat/nut.c
new file mode 100644
index 000000000..fdcaac6a3
--- /dev/null
+++ b/contrib/ffmpeg/libavformat/nut.c
@@ -0,0 +1,62 @@
+/*
+ * nut
+ * Copyright (c) 2004-2007 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "nut.h"
+#include "tree.h"
+
+void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){
+    int i;
+    for(i=0; i<nut->avf->nb_streams; i++){
+        nut->stream[i].last_pts= av_rescale_rnd(
+            val,
+            time_base.num * (int64_t)nut->stream[i].time_base->den,
+            time_base.den * (int64_t)nut->stream[i].time_base->num,
+            AV_ROUND_DOWN);
+    }
+}
+
+int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){
+    int64_t mask = (1<<stream->msb_pts_shift)-1;
+    int64_t delta= stream->last_pts - mask/2;
+    return  ((lsb - delta)&mask) + delta;
+}
+
+int ff_nut_sp_pos_cmp(syncpoint_t *a, syncpoint_t *b){
+    return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);
+}
+
+int ff_nut_sp_pts_cmp(syncpoint_t *a, syncpoint_t *b){
+    return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);
+}
+
+void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){
+    syncpoint_t *sp= av_mallocz(sizeof(syncpoint_t));
+    struct AVTreeNode *node= av_mallocz(av_tree_node_size);
+
+    sp->pos= pos;
+    sp->back_ptr= back_ptr;
+    sp->ts= ts;
+    av_tree_insert(&nut->syncpoints, sp, ff_nut_sp_pos_cmp, &node);
+    if(node){
+        av_free(sp);
+        av_free(node);
+    }
+}