move syncpoint timestamp resetting code to a common file

Originally committed as revision 10020 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/Makefile

@@ -101,7 +101,7 @@ OBJS-$(CONFIG_MTV_DEMUXER)               += mtv.o
 OBJS-$(CONFIG_MXF_DEMUXER)               += mxf.o
 OBJS-$(CONFIG_NSV_DEMUXER)               += nsvdec.o
 OBJS-$(CONFIG_NULL_MUXER)                += raw.o
-OBJS-$(CONFIG_NUT_DEMUXER)               += nutdec.o riff.o
+OBJS-$(CONFIG_NUT_DEMUXER)               += nutdec.o nut.o riff.o
 OBJS-$(CONFIG_NUV_DEMUXER)               += nuv.o riff.o
 OBJS-$(CONFIG_OGG_DEMUXER)               += ogg2.o           \
                                             oggparsevorbis.o \

libavformat/nut.c

@@ -0,0 +1,33 @@
+/*
+ * 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"
+
+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 / nut->time_base_count,
+            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);
+    }
+}

libavformat/nut.h

@@ -98,4 +98,6 @@ static unsigned long av_crc04C11DB7_update(unsigned long checksum, const uint8_t
     return av_crc(av_crc04C11DB7, checksum, buf, len);
 }
 
+void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
+
 #endif /* AVFORMAT_NUT_H */

libavformat/nutdec.c

@@ -447,7 +447,6 @@ static int decode_syncpoint(NUTContext *nut, int64_t *ts, int64_t *back_ptr){
     AVFormatContext *s= nut->avf;
     ByteIOContext *bc = &s->pb;
     int64_t end, tmp;
-    int i;
     AVRational time_base;
 
     nut->last_syncpoint_pos= url_ftell(bc)-8;
@@ -460,16 +459,7 @@ static int decode_syncpoint(NUTContext *nut, int64_t *ts, int64_t *back_ptr){
     if(*back_ptr < 0)
         return -1;
 
-    time_base= nut->time_base[tmp % nut->time_base_count];
-    for(i=0; i<s->nb_streams; i++){
-        nut->stream[i].last_pts= av_rescale_rnd(
-            tmp / nut->time_base_count,
-            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);
-        //last_key_frame ?
-    }
-    //FIXME put this in a reset func maybe
+    ff_nut_reset_ts(nut, nut->time_base[tmp % nut->time_base_count], tmp);
 
     if(skip_reserved(bc, end) || get_checksum(bc)){
         av_log(s, AV_LOG_ERROR, "sync point checksum mismatch\n");