Bug 111888 – [GStreamer] Seeking related data corruption and broken offset handling in WebKitWebSrc

• Status: RESOLVED
• Resolution: FIXED
• Component: Media

[Sebastian Dröge (slomo)]

Hi,

there's potential seeking related data corruption in WebKitWebSrc, see this gst-plugins-good commit for an explanation:
http://cgit.freedesktop.org/gstreamer/gst-plugins-good/commit/ext/soup/gstsouphttpsrc.c?id=95f6e0dbe440cc0399a54221d672f11e4e1d6ee8

The code in WebKitWebSrc is doing basically the same and attached patch fixes it in the same way

[Sebastian Dröge (slomo)]

Created attachment 192298 [details]
Fix offset handling in GStreamer WebKitWebSource

Also the offset handling was completely broken after a seek (offsets were starting at 0 again instead of the seek position), this patch fixes it now.

[Sebastian Dröge (slomo)]

Created attachment 192301 [details]
Fix offset handling in GStreamer WebKitWebSource

[Sebastian Dröge (slomo)]

I should mention that this also causes these warnings in the GStreamer debug logs:

0:00:00.799966750 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 0 != 99761158
0:00:00.814100750 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 11154 != 99772312
0:00:00.818346833 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 14050 != 99775208
0:00:00.827516708 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 32874 != 99794032
0:00:00.835650083 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 35770 != 99796928
0:00:00.851485041 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 40114 != 99801272
0:00:00.856966208 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 48802 != 99809960
0:00:00.867456083 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 51698 != 99812856
0:00:00.871585125 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 57490 != 99818648
0:00:00.874578917 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 76314 != 99837472
0:00:00.877421333 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 77762 != 99838920
0:00:00.882384875 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 82106 != 99843264
0:00:00.885572791 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 86450 != 99847608
0:00:00.886786250 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 89346 != 99850504
0:00:00.888003333 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 92242 != 99853400
0:00:00.890657875 32616   0x1d4600 WARN                  queue2 gstqueue2.c:1610:gst_queue2_create_write:<queue2-0> buffer offset does not match current writing position! 95138 != 99856296

[Philippe Normand]

Comment on attachment 192301 [details]
Fix offset handling in GStreamer WebKitWebSource

Thanks!

[WebKit Review Bot]

Comment on attachment 192301 [details]
Fix offset handling in GStreamer WebKitWebSource

Clearing flags on attachment: 192301

Committed r145318: <http://trac.webkit.org/changeset/145318>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.

[Martin Robinson]

This should probably be merged into the WebKitGTK 2.x branch. Do you mind adding it to the merge tracker?

[Sebastian Dröge (slomo)]

How?

[Martin Robinson]

Sorry. You should just add a link to the trac commit page to 
http://trac.webkit.org/wiki/WebKitGTK/2.0.x .