Stefan Sauer [Thu, 21 Feb 2013 07:15:45 +0000 (08:15 +0100)]
adder: ensure sending a flush-stop after flush-start
Previously adder was only sending the flush-stop, when it saw the flushing seek.
If one sends a flushing see direcly to an element upstream of adder, it would
fail to unflush the downstream pads.
Arnaud Vrac [Tue, 19 Feb 2013 16:49:08 +0000 (17:49 +0100)]
video-overlay-composition: fix ayuv/argb conversion
Helps when using dvbsuboverlay in connection with vaapisink
or some other video sink that wants ARGB pixels (dvbsuboverlay
attaches pixels in AYUV format, and we then convert as needed).
Alignment should not be a problem here.
Tim-Philipp Müller [Tue, 19 Feb 2013 12:53:47 +0000 (12:53 +0000)]
pango: use new GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS define
https://bugzilla.gnome.org/show_bug.cgi?id=665751
Tim-Philipp Müller [Tue, 19 Feb 2013 12:46:14 +0000 (12:46 +0000)]
video: add define for video formats supported by the overlay blending code
For use in template caps by overlay elements that use
video_overlay_composition_blend().
API: GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS
https://bugzilla.gnome.org/show_bug.cgi?id=665751
Sebastian Dröge [Tue, 19 Feb 2013 11:55:34 +0000 (12:55 +0100)]
pkg-config: Fix gstreamer-plugins-base pkg-config files to include all libraries
Benjamin Gaignard [Tue, 19 Feb 2013 10:52:22 +0000 (11:52 +0100)]
dmabuf: Include config.h
Tim-Philipp Müller [Tue, 19 Feb 2013 10:21:40 +0000 (10:21 +0000)]
allocators: add guard and minor clean-ups
Tim-Philipp Müller [Tue, 19 Feb 2013 09:40:31 +0000 (09:40 +0000)]
allocators: add some since markers and misc other doc clean-ups
Tim-Philipp Müller [Tue, 19 Feb 2013 09:35:10 +0000 (09:35 +0000)]
allocators: header clean-up
Tim-Philipp Müller [Tue, 19 Feb 2013 09:32:08 +0000 (09:32 +0000)]
configure: use AC_CHECK_FUNC to check for mmap
Sebastian Dröge [Tue, 19 Feb 2013 09:05:17 +0000 (10:05 +0100)]
allocators: Integrate into the documentation
Sebastian Dröge [Tue, 19 Feb 2013 08:40:42 +0000 (09:40 +0100)]
allocators: Add .def file with all exports
Sebastian Dröge [Tue, 19 Feb 2013 08:39:24 +0000 (09:39 +0100)]
allocators: Add single-include header
Sebastian Dröge [Tue, 19 Feb 2013 08:35:51 +0000 (09:35 +0100)]
dmabuf: Improve documentation and annotations a bit
Benjamin Gaignard [Mon, 18 Feb 2013 14:18:38 +0000 (15:18 +0100)]
allocators: Add dmabuf-based GstMemory and GstAllocator
Create new GstMemory and GstAllocator base on dmabuf.
Memory is not allocated/freed by userland but mapped/unmmaped
from a dmabuf file descriptor when requested.
This allocator is included in a new lib called libgstallocators
https://bugzilla.gnome.org/show_bug.cgi?id=693826
Tim-Philipp Müller [Sat, 16 Feb 2013 23:55:57 +0000 (23:55 +0000)]
tests: fix encodebin unit test on 32-bit systems
Fixes critical warning on x86:
g_object_set_valist: object class `GstOggMux' has no property named `testingoggmux'
Tim-Philipp Müller [Sat, 16 Feb 2013 12:09:53 +0000 (12:09 +0000)]
audio: fix GST_AUDIO_INFO_ENDIANNESS macro
Vincent Penquerc'h [Thu, 14 Feb 2013 15:59:51 +0000 (15:59 +0000)]
encodebin: activate ghost pad after creating it
This ensures the ghost pad will not stay in flushing mode
when it receives a flush stop event, and generally behave
badly.
This fixes at least one case of a dynamic decodebin2 + encodebin
pipeline finding a source that has not prerolled when it should
have been (due to the ghostpad staying in flushing mode).
Matej Knopp [Wed, 13 Feb 2013 23:54:34 +0000 (00:54 +0100)]
decodebin: don't block on caps
Sebastian Dröge [Thu, 14 Feb 2013 10:25:37 +0000 (11:25 +0100)]
decodebin: Remove left-over line from last commit
Matej Knopp [Thu, 14 Feb 2013 10:17:31 +0000 (11:17 +0100)]
decodebin: Check if value is set before unsetting it
https://bugzilla.gnome.org/show_bug.cgi?id=693401
Matej Knopp [Wed, 13 Feb 2013 22:28:01 +0000 (23:28 +0100)]
riffmedia: add systemstream to all mpeg video caps
Tim-Philipp Müller [Thu, 14 Feb 2013 00:29:01 +0000 (00:29 +0000)]
vorbistag: add mapping for TOTALTRACKS and TOTALDISCS tags
Found TOTALTRACKS in a FLAC file instead of TRACKTOTAL,
we should at least read this if present.
http://www.hydrogenaudio.org/forums/index.php?showtopic=91496&st=0&p=773857&#entry773857
Tim-Philipp Müller [Wed, 13 Feb 2013 21:00:28 +0000 (21:00 +0000)]
typefinding: add parsed=true to mp3 and mpeg2 video ES caps
Because we can, and that's also what we do for other formats.
Stefan Sauer [Wed, 13 Feb 2013 20:08:48 +0000 (21:08 +0100)]
adder: use the collect_pads_query func
We were setting the query-func on the sink-pad, which got overwritten when
adding the new pad to collect pads. Instead register our query-func with the
collect pads object. This fixes filter caps. Add a test for it.
Stefan Sauer [Wed, 13 Feb 2013 20:07:55 +0000 (21:07 +0100)]
mediatype-audio: write out 24 in 32bit formats
Sebastian Dröge [Wed, 13 Feb 2013 10:25:02 +0000 (11:25 +0100)]
decodebin: Fix MP3 parser unit test
The MP3 parser required fields on its caps that it
didn't need and never got from (e.g.) typefind.
Vincent Penquerc'h [Tue, 12 Feb 2013 17:22:23 +0000 (17:22 +0000)]
encodebin: sync muxer state with parent bin
Other elements were synced, but not the muxer.
Thijs Vermeir [Wed, 2 Jan 2013 11:15:25 +0000 (12:15 +0100)]
videodecoder: allow parse function to not use all data on adapter
Alexander Schrab [Fri, 8 Feb 2013 07:46:25 +0000 (08:46 +0100)]
decodebin: Push caps event immediately to ghost pad to avoid exposing pads without caps
David Schleef [Fri, 8 Feb 2013 23:31:28 +0000 (15:31 -0800)]
videodecoder: Don't blindly assign DTS to PTS
DTS and PTS usually have a non-zero offset between them in MPEG-TS,
so assigning DTS to PTS is almost always wrong. The other, newer
timestamp recovery code does it correctly if we leave it as invalid.
David Schleef [Mon, 11 Feb 2013 19:54:46 +0000 (11:54 -0800)]
videodecoder: warn if frame list gets long
Decoders that get unparsed input are internally leaking nearly
every incoming buffer. This checks that case.
Tim-Philipp Müller [Sat, 9 Feb 2013 16:50:05 +0000 (16:50 +0000)]
tests: don't use deprecated thread API in streamsynchronizer test
Marc Leeman [Thu, 7 Feb 2013 09:49:33 +0000 (10:49 +0100)]
decodebin: g_mutex_new -> g_mutex_init
Don't use deprecated GLib API.
https://bugzilla.gnome.org/show_bug.cgi?id=693302
Jan Schmidt [Thu, 7 Feb 2013 13:05:24 +0000 (00:05 +1100)]
pango: 3rd time's the charm. Fix attribute list handling.
Really really fix attribute list handling by taking a
copy of the original attributes that pango_attr_list_filter
can mutate, but keep the original around intact to restore
later.
Jan Schmidt [Thu, 7 Feb 2013 12:45:26 +0000 (23:45 +1100)]
pango: Don't modify the original attributes list.
Take a copy of the original attributes list instead of just
a ref, since pango_attr_list_filter can remove elements from it.
Jan Schmidt [Thu, 7 Feb 2013 12:06:16 +0000 (23:06 +1100)]
pango: Remove extra pango_attr_list_copy() from basetextoverlay
Fixes a per-buffer memory leak of the attribute list.
Tim-Philipp Müller [Wed, 6 Feb 2013 12:36:19 +0000 (12:36 +0000)]
video: fix return type of _get_palette() and add since markers to docs
'const gpointer' is not the same as 'gconstpointer', see
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35928.
Wim Taymans [Wed, 6 Feb 2013 09:07:47 +0000 (10:07 +0100)]
appsrc: negotiate before popping buffer
First negotiate and then try to pop a buffer from the queue. This is just
to improve the debug log.
Wim Taymans [Wed, 6 Feb 2013 09:00:27 +0000 (10:00 +0100)]
appsrc: always take mutex before object lock
The locking order is to first take the appsrc mutex and then the
object lock.
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=693224
Wim Taymans [Tue, 5 Feb 2013 10:20:20 +0000 (11:20 +0100)]
videotestsrc: use video library palette
Use the palette provided and used by the video library instead of making our own
copy.
Wim Taymans [Tue, 5 Feb 2013 09:46:50 +0000 (10:46 +0100)]
videoscale: scale each field in interlace mode
When we are dealing with interlaced content, scale each field intependently so
that we don't destroy the interlacing.
See https://bugzilla.gnome.org/show_bug.cgi?id=588535
Wim Taymans [Mon, 4 Feb 2013 15:21:20 +0000 (16:21 +0100)]
videoconvert: interlace support to some fastpath functions
Add interlace support for some fastpath functions.
Wim Taymans [Mon, 4 Feb 2013 14:40:02 +0000 (15:40 +0100)]
videoconvert: make fast path interlaced aware
Make sure that we also handle interlacing when choosing the fast path.
See https://bugzilla.gnome.org/show_bug.cgi?id=588535
Wim Taymans [Mon, 4 Feb 2013 14:19:35 +0000 (15:19 +0100)]
videoconvert: pass frame interlaced flag to pack/unpack
If the frame is interlaced, pass the interlaced flag to the pack/unpack
functions to make it unpack correctly.
Wim Taymans [Mon, 4 Feb 2013 14:01:10 +0000 (15:01 +0100)]
video-format: fix interlaced 4:2:0 and 4:1:0 pack/unpack
For interlaced vertically subsampled images we need to combine alternating
chroma lines with alternating luma lines. That is line 0 and 2 are combined
with the first line of chroma samples and line 1 and 3 with the second line
of chroma samples.
See also: https://bugzilla.gnome.org/show_bug.cgi?id=588535
Wim Taymans [Fri, 1 Feb 2013 15:47:32 +0000 (16:47 +0100)]
videoconvert: use the palette helper functions
Get the palette from the video library instead of making our own.
Wim Taymans [Fri, 1 Feb 2013 15:46:42 +0000 (16:46 +0100)]
video-format: add method to get palette
Make a new method to get the default palette for paletted formats.
Wim Taymans [Fri, 1 Feb 2013 10:51:12 +0000 (11:51 +0100)]
videoconvert: make a constant of scale factor
Wim Taymans [Fri, 1 Feb 2013 10:42:58 +0000 (11:42 +0100)]
video-format: add interlace flag
Add an interlaced flag that can be used to control the unpack/pack
functions.
Wim Taymans [Thu, 31 Jan 2013 11:57:11 +0000 (12:57 +0100)]
riff: add more gray8 variants
Dirk Van Haerenborgh [Thu, 31 Jan 2013 10:41:06 +0000 (11:41 +0100)]
riff: add support for raw monochrome 8-bit video
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=692930
Wim Taymans [Tue, 29 Jan 2013 09:18:06 +0000 (10:18 +0100)]
visualizer: improve allocation
Based on patch by Matthew Waters
Add private data
Add decide_allocation vmethod
Refactor bufferpool negotiation
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=681719
Stefan Sauer [Mon, 28 Jan 2013 19:41:44 +0000 (20:41 +0100)]
Automatic update of common submodule
From a942293 to 2de221c
B.Prathibha [Sun, 27 Jan 2013 04:15:59 +0000 (09:45 +0530)]
tests: use g_timeout_add_seconds wherever possible.
https://bugzilla.gnome.org/show_bug.cgi?id=692613
Olivier Crête [Fri, 25 Jan 2013 01:15:09 +0000 (20:15 -0500)]
docs: Put GST_*_INIT into the -sections.txt file too
Olivier Crête [Fri, 25 Jan 2013 01:12:41 +0000 (20:12 -0500)]
doc: Sort new things into ..-libs-sections.txt
yanghuolin [Thu, 15 Nov 2012 08:31:47 +0000 (03:31 -0500)]
alsasink: don't use 100% CPU
The root cause is that alsa-lib is not thread safe for the same handle.
There are two threads in the gstreamer accessing alsa-lib not serilized.
The race condition happens when one thread holds the old framebuffer app_ptr
position in the kernel, another thread advances the framebuffer app_ptr.
when the former thread is scheduled to run again, it overwrites the app_ptr
to old value by copying from kernel.Thus,the app_ptr in the upper
alsa-lib(pcm_rate) become one period size more advanced than the lower
alsa-lib(pcm_hw & kernel).
gstreamer uses noblock and poll method to communicate with the alsa-lib.
The app_ptr unsync situation as described above makes the poll return immediately because
it concludes there is enough space for the ring-buffer via the low-level alsa-lib.
The write function returns immediately because it concludes there is not enough
space for the ring-buffer from the upper-level alsa-lib. Then the loop of poll
and write runs again and again until another period size is available for
ring-buffer.This leads to the cpu 100 problem.
delay_lock is used to avoid the race condition.
Fixes: https://bugzilla.gnome.org/show_bug.cgi?id=690937
Tim-Philipp Müller [Sat, 19 Jan 2013 13:03:03 +0000 (13:03 +0000)]
decodebin: try harder to always expose pads in the same order
Use stream-id as sort criterion in addition to the media type.
https://bugzilla.gnome.org/show_bug.cgi?id=634407
Tim-Philipp Müller [Thu, 17 Jan 2013 09:50:16 +0000 (09:50 +0000)]
tests: disable ABI checks for architectures with outdated structure size files
Tim-Philipp Müller [Wed, 16 Jan 2013 10:16:27 +0000 (10:16 +0000)]
gst-libs: use GST_*_1_0 environment variables everywhere
The _1_0 suffixed environment variables override the
non-suffixed ones, so if we're in an environment that
sets the _1_0 suffixed ones, such as jhbuild, we need
to set those to make sure ours actually always get
used.
Tim-Philipp Müller [Wed, 16 Jan 2013 10:16:14 +0000 (10:16 +0000)]
po: update for new translatable string
Tim-Philipp Müller [Tue, 15 Jan 2013 17:33:38 +0000 (17:33 +0000)]
pbutils: add description for SBC audio caps
Tim-Philipp Müller [Tue, 15 Jan 2013 17:27:31 +0000 (17:27 +0000)]
typefinding: add typefind functions for SBC audio
https://bugzilla.gnome.org/show_bug.cgi?id=690582
Tim-Philipp Müller [Tue, 15 Jan 2013 15:04:12 +0000 (15:04 +0000)]
Automatic update of common submodule
From a72faea to a942293
Martin Pitt [Tue, 15 Jan 2013 12:39:20 +0000 (12:39 +0000)]
tests: use _1_0 variants for the various registry variables
These override the variants without version suffix. Makes
'make check' work properly in environments that set the
suffixed variant for 1.0, such as jhbuild.
Martin Pitt [Tue, 15 Jan 2013 12:06:28 +0000 (13:06 +0100)]
Set $GST_PLUGIN_PATH_1_0 for tests as well
jhbuild already sets $GST_PLUGIN_PATH_1_0 which overrides $GST_PLUGIN_PATH. Set
both for the tests to see the locally built elements. Fixes 'make check' in
jhbuild.
Pete Beardmore [Mon, 24 Dec 2012 18:25:10 +0000 (18:25 +0000)]
riff: add waveformatextension generic support
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=690591
Tim-Philipp Müller [Mon, 14 Jan 2013 10:34:04 +0000 (10:34 +0000)]
docs: fix 0.10-ism in GstTagImageType docs
The image type is not in the info structure in the sample,
not in the caps.
https://bugzilla.gnome.org/show_bug.cgi?id=691687
Stefan Sauer [Wed, 9 Jan 2013 22:15:06 +0000 (23:15 +0100)]
volume: a return value of FALSE from the controller is not fatal
A return value of FALSE here indicates that we don't have control-values. In
0.10 we were returning the default value of the property. Now we don't fill an
array with defaults in the ControlBinding, but leave it up to the element to
handle this case.
Vincent Penquerc'h [Mon, 7 Jan 2013 18:01:31 +0000 (18:01 +0000)]
oggdemux: fix incorrect testing of invalid granpos values
Positive granulepos is valid, -1 granulepos is unset, and all
other negative granulepos are invalid.
Reported by Tim-Philipp Müller
Nicolas Dufresne [Mon, 30 Apr 2012 18:31:16 +0000 (14:31 -0400)]
videoencoder: Remove done ToDo
https://bugzilla.gnome.org/show_bug.cgi?id=675761
Nicolas Dufresne [Wed, 2 May 2012 17:50:45 +0000 (13:50 -0400)]
videoencoder: Documentation fix
https://bugzilla.gnome.org/show_bug.cgi?id=675761
Tim-Philipp Müller [Sat, 29 Dec 2012 14:29:53 +0000 (14:29 +0000)]
audio: don't use uninitialized variable in debug log
https://bugzilla.gnome.org/show_bug.cgi?id=667317
Tim-Philipp Müller [Sun, 23 Dec 2012 15:51:51 +0000 (15:51 +0000)]
encoding-profile: add special-casing for asf/wmv/wma file extensions
https://bugzilla.gnome.org/show_bug.cgi?id=636753
Tim-Philipp Müller [Sun, 23 Dec 2012 15:32:02 +0000 (15:32 +0000)]
win32: update .def file for new rtsp API
Tim-Philipp Müller [Sun, 23 Dec 2012 15:26:59 +0000 (15:26 +0000)]
encoding-profile: add gst_encoding_profile_get_file_extension()
API: gst_encoding_profile_get_file_extension()
https://bugzilla.gnome.org/show_bug.cgi?id=636753
Tim-Philipp Müller [Sat, 22 Dec 2012 21:19:51 +0000 (21:19 +0000)]
textoverlay: minor clean-up
Remove some macros that aren't needed any more.
Tim-Philipp Müller [Sat, 22 Dec 2012 21:18:11 +0000 (21:18 +0000)]
textoverlay: support shaded background for A420 format
https://bugzilla.gnome.org/show_bug.cgi?id=687817
Tim-Philipp Müller [Sat, 22 Dec 2012 21:04:11 +0000 (21:04 +0000)]
video: fix A420 size calculation
Wim Taymans [Fri, 21 Dec 2012 15:38:36 +0000 (16:38 +0100)]
decodebin2: use NO_RESYNC flag
to avoid the state change function from messing with the state of the elements
that we add.
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=690420
Wim Taymans [Fri, 21 Dec 2012 13:03:32 +0000 (14:03 +0100)]
riff: add channel masks for all formats
Add the channel masks for all the extensible formats
Pass the number of channels instead of reading them from caps.
Pete Beardmore [Fri, 21 Dec 2012 02:27:12 +0000 (02:27 +0000)]
riff: add waveformatextension ac3 support
fixes #690591
Wim Taymans [Thu, 20 Dec 2012 15:42:42 +0000 (16:42 +0100)]
audioclock: mark as using some other clock
We need to mark our clock as using some other clock source. Alsa source uses the
clock type to decide if it can use alsa driver timestamps or not.
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=690465
Wim Taymans [Thu, 20 Dec 2012 15:41:48 +0000 (16:41 +0100)]
audiobasesrc: init variable
We need to initialize this variable because we can't be sure that the subclass
will set it.
Thijs Vermeir [Tue, 18 Dec 2012 14:34:42 +0000 (15:34 +0100)]
vorbis: fix unused variable
Thijs Vermeir [Tue, 18 Dec 2012 14:31:52 +0000 (15:31 +0100)]
video: use appropriate printf format for gsize
Thijs Vermeir [Tue, 18 Dec 2012 14:27:48 +0000 (15:27 +0100)]
rtp: fix compiler warning
comparison is always true due to limited range of data type
Tim-Philipp Müller [Mon, 17 Dec 2012 20:32:52 +0000 (20:32 +0000)]
alsasrc: return negative value on read error
Otherwise baseaudiosrc won't go into the error code path.
https://bugzilla.gnome.org/show_bug.cgi?id=690197
Tim-Philipp Müller [Mon, 17 Dec 2012 20:28:12 +0000 (20:28 +0000)]
audiobasesrc: bail out if subclass posts an error
Use new ringbuffer ERROR state to make all the various
threads bail out correctly when the subclass posts an
error. It's a bit iffy to communicate this properly
between the different bits of code.
https://bugzilla.gnome.org/show_bug.cgi?id=690197
Tim-Philipp Müller [Mon, 17 Dec 2012 20:26:33 +0000 (20:26 +0000)]
audioringbuffer: add GST_AUDIO_RING_BUFFER_STATE_ERROR state
API: GST_AUDIO_RING_BUFFER_STATE_ERROR
https://bugzilla.gnome.org/show_bug.cgi?id=690197
Thibault Saunier [Sat, 15 Dec 2012 17:43:40 +0000 (14:43 -0300)]
encodebing: Use the preset_name as the factory name and preset as the name of the preset
The naming is not perfect, but at least we can keep the exact same behaviour as
before.
Thiago Santos [Tue, 2 Aug 2011 13:11:14 +0000 (10:11 -0300)]
audiobasesrc: Always resync the ringbuffer on the first buffer
In SKEW mode, use next_sample == -1 to check for the first sample
when starting to read samples so it resyncs the ringbuffer and
timestamps are ok.
Suggestion from Teemu Katajisto <teemu.katajisto@digia.com>
https://bugzilla.gnome.org/show_bug.cgi?id=648359
Tim-Philipp Müller [Mon, 17 Dec 2012 00:59:57 +0000 (00:59 +0000)]
ssaparse: ignore invalid UTF-8 in init section
The codec data blob we get from matroskademux with the SSA/ASS
init section is supposed to be valid UTF-8. If it's not, just
continue with the bits that are valid UTF-8 instead of erroring
out. We don't actually parse the init section yet anyway..
https://bugzilla.gnome.org/show_bug.cgi?id=607630
Tim-Philipp Müller [Sun, 16 Dec 2012 12:34:14 +0000 (12:34 +0000)]
subparse: fix GError leak
Tim-Philipp Müller [Sun, 16 Dec 2012 12:05:02 +0000 (12:05 +0000)]
typefinding: detect stand-alone SSA/ASS subtitle files
https://bugzilla.gnome.org/show_bug.cgi?id=625113
Tim-Philipp Müller [Sat, 15 Dec 2012 19:36:56 +0000 (19:36 +0000)]
alsa: post error message when audio device disappears
Don't loop forever if an USB audio device gets disconnected
while in use. Post an error message instead. This is not
enough yet though, we still need to make the base class
and/or the ring buffer bail out.
https://bugzilla.gnome.org/show_bug.cgi?id=690197
Tim-Philipp Müller [Fri, 14 Dec 2012 20:27:53 +0000 (20:27 +0000)]
pbutils: add some more flags and file extensions to internal media type descriptions table
For later use.
https://bugzilla.gnome.org/show_bug.cgi?id=636753
https://bugzilla.gnome.org/show_bug.cgi?id=549111
Wim Taymans [Fri, 14 Dec 2012 10:36:58 +0000 (11:36 +0100)]
rtspconnection: add limit to queued messages
Add a limit to the amount of queued bytes or messages we allow on the watch.
API: GstRTSPConnection::gst_rtsp_watch_set_send_backlog()
API: GstRTSPConnection::gst_rtsp_watch_get_send_backlog()
Wim Taymans [Thu, 13 Dec 2012 10:31:28 +0000 (11:31 +0100)]
playsink: fix vis switch with format change
Block the pad before the resample and convertor elements to give the a chance to
negotiate new caps with the newly switched vis plugin.
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=679976