[gstreamer-bugs] [Bug 589663] New: gstreamer asserts in gstaudiofilter

Fri Jul 24 19:16:58 PDT 2009

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  GStreamer | gstreamer (core) | Ver: 0.10.23
           Summary: gstreamer asserts in gstaudiofilter
           Product: GStreamer
           Version: 0.10.23
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: youness.alaoui at collabora.co.uk
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified

Hi,

aMSN uses gstreamer/farsight for audio/video calls and it looks like gstreamer
contains an assert that shouldn't be there... 

In the following program, I dynamically link elements when the pipeline is
running and my 'volume' element gets as input caps
"audio/x-raw-int,width=8,depth=8,rate=44100,signed=true,channels=1" but in it's
output caps it has 'endianness=1234' added.. this is caused by osssrc that has
the endianness missing for the 'width=8,depth=8,...' caps.

In gst_audio_filter_set_caps, there's an assert on gst_caps_equal(incaps,
outcaps).

First, osssrc should add the endianness for its width/depth=8 caps, but also
the assert in gstaudiofilter.c should either be removed or should be on
gst_caps_interest, not on gst_caps_equal...
Here's the small python code that reproduces the error (same as my C app), as
well as the assertion error I get and the backtrace.

-------------- example code -------------------
#!/usr/bin/python
import gst, time

p = gst.parse_launch("osssrc ! audio/x-raw-int, width=8 ! valve name=v
drop=true")
p.set_state(gst.STATE_PLAYING)

time.sleep(1)

v = p.get_by_name("v")
b = gst.parse_bin_from_description("volume ! fakesink", True)
p.add(b)
v.link(b)
p.set_state(gst.STATE_PLAYING)

v.set_property("drop", False)

time.sleep(1)
-----------------------------------------------
---------------------- output -----------------
**
ERROR:gstaudiofilter.c:168:gst_audio_filter_set_caps: assertion failed:
(gst_caps_is_equal (incaps, outcaps))
zsh: abort      python bug_gstreamer.py
-----------------------------------------------
------------------- backtrace -----------------
(gdb) bt
#0  0xb7fe1430 in __kernel_vsyscall ()
#1  0xb7e403a0 in raise () from /lib/i686/cmov/libc.so.6
#2  0xb7e43a55 in abort () from /lib/i686/cmov/libc.so.6
#3  0xb773e06c in IA__g_assertion_message (domain=0xb777b29e "",
file=0xb74f44ce "gstaudiofilter.c", line=168, func=0xb74f4589
"gst_audio_filter_set_caps", 
    message=0x82e79b0 "assertion failed: (gst_caps_is_equal (incaps,
outcaps))") at
/build/buildd-glib2.0_2.20.4-1-i386-6KfM1O/glib2.0-2.20.4/glib/gtestutils.c:1301
#4  0xb773e68d in IA__g_assertion_message_expr (domain=0x0, file=0xb74f44ce
"gstaudiofilter.c", line=168, func=0xb74f4589 "gst_audio_filter_set_caps",
expr=0xb74f4538 "gst_caps_is_equal (incaps, outcaps)")
    at
/build/buildd-glib2.0_2.20.4-1-i386-6KfM1O/glib2.0-2.20.4/glib/gtestutils.c:1312
#5  0xb74e14c2 in gst_audio_filter_set_caps (btrans=0x8476050,
incaps=0x8474860, outcaps=0x8474c80) at gstaudiofilter.c:168
#6  0xb79f5422 in gst_base_transform_configure_caps (trans=0x8476050,
in=0x8474860, out=0x8474c80) at gstbasetransform.c:694
#7  0xb79f682a in gst_base_transform_setcaps (pad=0x836d400, caps=0x8474860) at
gstbasetransform.c:1107
#8  0xb796d84a in gst_pad_set_caps (pad=0x836d400, caps=0x8474860) at
gstpad.c:2506
#9  0xb796086c in gst_proxy_pad_do_setcaps (pad=0x8472800, caps=0x8474860) at
gstghostpad.c:305
#10 0xb796d84a in gst_pad_set_caps (pad=0x8472800, caps=0x8474860) at
gstpad.c:2506
#11 0xb796e48c in gst_pad_configure_sink (pad=0x8472800, caps=0x8474860) at
gstpad.c:2560
#12 0xb796e6f3 in gst_pad_chain_unchecked (pad=0x8472800, buffer=0x8444b70) at
gstpad.c:3962
#13 0xb796fa1a in gst_pad_push (pad=0x836d100, buffer=0x8444b70) at
gstpad.c:4144
#14 0xb751baad in gst_valve_chain (pad=0x836d1c0, buffer=0x8444b70) at
gstvalve.c:214
#15 0xb796e605 in gst_pad_chain_unchecked (pad=0x836d1c0, buffer=0x8444b70) at
gstpad.c:3977
#16 0xb796fa1a in gst_pad_push (pad=0x836d340, buffer=0x8444b70) at
gstpad.c:4144
#17 0xb79f837f in gst_base_transform_chain (pad=0x836d280, buffer=0x8444b70) at
gstbasetransform.c:2038
#18 0xb796e605 in gst_pad_chain_unchecked (pad=0x836d280, buffer=0x8444b70) at
gstpad.c:3977
#19 0xb796fa1a in gst_pad_push (pad=0x836d040, buffer=0x8444b70) at
gstpad.c:4144
#20 0xb79efd59 in gst_base_src_loop (pad=0x836d040) at gstbasesrc.c:2279
#21 0xb7992ec3 in gst_task_func (task=0x81c0870, tclass=0x82170d0) at
gsttask.c:172
#22 0xb7742b96 in g_thread_pool_thread_proxy (data=0x8217160) at
/build/buildd-glib2.0_2.20.4-1-i386-6KfM1O/glib2.0-2.20.4/glib/gthreadpool.c:265
#23 0xb774154f in g_thread_create_proxy (data=0x8443b18) at
/build/buildd-glib2.0_2.20.4-1-i386-6KfM1O/glib2.0-2.20.4/glib/gthread.c:635
#24 0xb7fa8495 in start_thread () from /lib/i686/cmov/libpthread.so.0
#25 0xb7ef6a1e in clone () from /lib/i686/cmov/libc.so.6
--------------------------------------------------

Please fix before the next release.

Thanks,
KaKaRoTo

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