Bug 519155 - reset oggz seek on failure. r=doublec

content/media/test/Makefile.in

@@ -132,6 +132,7 @@ _TEST_FILES += \
 		bug504843.ogv \
 		bug506094.ogv \
 		bug516323.ogv \
+		chain.ogv \
 		dirac.ogg \
 		seek.ogv \
 		short-video.ogv \

content/media/test/manifest.js

@@ -13,6 +13,7 @@ var gSmallTests = [
   { name:"bug498855-2.ogv", type:"video/ogg", duration:0.2 },
   { name:"bug498855-3.ogv", type:"video/ogg", duration:0.2 },
   { name:"bug504644.ogv", type:"video/ogg", duration:1.56 },
+  { name:"chain.ogv", type:"video/ogg", duration:Number.NaN },
   { name:"bogus.duh", type:"bogus/duh" }
 ];
 

media/liboggz/README_MOZILLA

@@ -26,3 +26,5 @@ bug516847.patch: Fix for bug 516847 (duplicate frame handling).
 bug518169.patch: Fix bug 518169, fix faster_seek.patch.
 
 bug504843.patch: Propogate read errors from oggz_read_sync().
+
+bug519155.patch: Fix oggz seek's reset so that it can rollback on fail correctly.

media/liboggz/bug519155.patch

@@ -0,0 +1,73 @@
+diff --git a/media/liboggz/src/liboggz/oggz_seek.c b/media/liboggz/src/liboggz/oggz_seek.c
+--- a/media/liboggz/src/liboggz/oggz_seek.c
++++ b/media/liboggz/src/liboggz/oggz_seek.c
+@@ -154,17 +154,17 @@ oggz_reset_seek (OGGZ * oggz, oggz_off_t
+   if (offset_at == -1) return -1;
+ 
+   oggz->offset = offset_at;
+ 
+ #ifdef DEBUG
+   printf ("reset to %" PRI_OGGZ_OFF_T "d\n", offset_at);
+ #endif
+ 
+-  if (unit != -1) reader->current_unit = unit;
++  reader->current_unit = unit;
+ 
+   return offset_at;
+ }
+ 
+ static long
+ oggz_reset (OGGZ * oggz, oggz_off_t offset, ogg_int64_t unit, int whence)
+ {
+   oggz_reset_streams (oggz);
+@@ -800,38 +800,49 @@ oggz_bounded_seek_set (OGGZ * oggz,
+ static ogg_int64_t
+ oggz_seek_end (OGGZ * oggz, ogg_int64_t unit_offset)
+ {
+   oggz_off_t offset_orig, offset_at, offset_end;
+   ogg_int64_t granulepos;
+   ogg_int64_t unit_end;
+   long serialno;
+   ogg_page * og;
++  OggzReader * reader = &oggz->x.reader;
+ 
+   og = &oggz->current_page;
+ 
+   offset_orig = oggz->offset;
+ 
+   offset_at = oggz_seek_raw (oggz, 0, SEEK_END);
+   if (offset_at == -1) return -1;
+ 
+   offset_end = oggz_get_prev_start_page (oggz, og, &granulepos, &serialno);
+ 
+   if (offset_end < 0) {
+     oggz_reset (oggz, offset_orig, -1, SEEK_SET);
+     return -1;
+   }
+ 
+   unit_end = oggz_get_unit (oggz, serialno, granulepos);
+-
++  
+ #ifdef DEBUG
+   printf ("*** oggz_seek_end: found packet (%lld) at @%" PRI_OGGZ_OFF_T "d [%lld]\n",
+ 	  unit_end, offset_end, granulepos);
+ #endif
+ 
++  if (unit_end == -1) {
++    /* Failed to get time at the end, reset and fail. */
++    oggz_reset (oggz, offset_orig, -1, SEEK_SET);
++    return -1;
++  }
++
++  reader->current_unit = unit_end;
++  if (unit_offset == 0) {
++    return unit_end;
++  }
+   return oggz_bounded_seek_set (oggz, unit_end + unit_offset, 0, -1, 0);
+ }
+ 
+ off_t
+ oggz_seek (OGGZ * oggz, oggz_off_t offset, int whence)
+ {
+   OggzReader * reader;
+   ogg_int64_t units = -1;

media/liboggz/src/liboggz/oggz_seek.c

@@ -159,7 +159,7 @@ oggz_reset_seek (OGGZ * oggz, oggz_off_t offset, ogg_int64_t unit, int whence)
   printf ("reset to %" PRI_OGGZ_OFF_T "d\n", offset_at);
 #endif
 
-  if (unit != -1) reader->current_unit = unit;
+  reader->current_unit = unit;
 
   return offset_at;
 }
@@ -805,6 +805,7 @@ oggz_seek_end (OGGZ * oggz, ogg_int64_t unit_offset)
   ogg_int64_t unit_end;
   long serialno;
   ogg_page * og;
+  OggzReader * reader = &oggz->x.reader;
 
   og = &oggz->current_page;
 
@@ -827,6 +828,16 @@ oggz_seek_end (OGGZ * oggz, ogg_int64_t unit_offset)
 	  unit_end, offset_end, granulepos);
 #endif
 
+  if (unit_end == -1) {
+    /* Failed to get time at the end, reset and fail. */
+    oggz_reset (oggz, offset_orig, -1, SEEK_SET);
+    return -1;
+  }
+
+  reader->current_unit = unit_end;
+  if (unit_offset == 0) {
+    return unit_end;
+  }
   return oggz_bounded_seek_set (oggz, unit_end + unit_offset, 0, -1, 0);
 }
 

media/liboggz/update.sh

@@ -59,3 +59,4 @@ patch -p3 <faster_seek.patch
 patch -p3 <bug516847.patch
 patch -p3 <bug518169.patch
 patch -p3 <bug504843.patch
+patch -p3 <bug519155.patch