Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_base_init),
(gst_ffmpegdec_register):
* ext/ffmpeg/gstffmpegdemux.c: (gst_ffmpegdemux_base_init),
(gst_ffmpegdemux_register):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_base_init),
(gst_ffmpegenc_register):
* ext/ffmpeg/gstffmpegmux.c: (gst_ffmpegmux_base_init),
(gst_ffmpegmux_register):
Don't use GINT_TO_POINTER and GPOINTER_TO_INT with GTypes, this
can break horribly if sizeof(GType) happens to be bigger than
sizeof(int), because GPOINTER_TO_INT might then chop off some bits
of our GType (the reason this seems to works nevertheless is the
put-current-type-also-as-value-0-into-the-hash-table-as-fallback
hack used in the current code).
In any case, instead of just fixing this, let's not use a hash table
with GTypes here at all. g_type_{set|get}_qdata() seems to do the
job just as well.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_me_method_get_type):
Make the name of the motion-estimation method enum values meaningful.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_class_init),
(gst_ffmpegenc_finalize):
Turn dispose function into finalize function to avoid double-frees
and potential crashes caused by them in some circumstances.
Fixes#392395.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_register):
My console is not your TODO list.
If it were your TODO list, you would have DONE it by now.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_getcaps),
(gst_ffmpegenc_setcaps), (gst_ffmpegenc_register):
MPEG4 standard does not accept framerates with a denominator greater
than (1<<16 - 1) (according to the ffmpeg encoder...).
We therefore scale down the framerate.
Small indentation fixes using gst-indent.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegcfg.c:
FLV is in fact h263 and can take the same parameters as other mpeg
derivatives.
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_codecid_to_caps),
(gst_ffmpeg_caps_with_codecid):
Add pixel format to video/x-dv,systemstream=False
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_class_init),
(gst_ffmpegenc_init):
Use EPZS (Enhanced Predictive Zonal Search) as the default motion
estimation method, since it's the best quality to speed compromise.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegcodecmap.c:
(gst_ffmpeg_formatid_get_codecids):
Added some codec mappings for dv and mov muxers.
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_getcaps),
(gst_ffmpegenc_register):
Don't attempt to add caps to a NULL caps.
Add video/x-raw-gray to the input raw video types.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_init):
Properly initialize ->lmin, ->lmax and ->max_key_interval so we don't
end up passing completely bogus data to the AVCodecContext.
Fixes#355584
Original commit message from CVS:
* ext/ffmpeg/gstffmpegdemux.c: (gst_ffmpegdemux_get_stream):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_setcaps):
Printf format fixes.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_register):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_register):
Don't leak caps in some cases and make build bots happy again.
Original commit message from CVS:
Patch by: Mark Nauwelaerts <manauw at skynet dot be>
* ext/ffmpeg/Makefile.am:
* ext/ffmpeg/gstffmpegcfg.c: (gst_ffmpeg_pass_get_type),
(gst_ffmpeg_lim_pass_get_type), (gst_ffmpeg_mb_decision_get_type),
(gst_ffmpeg_mb_cmp_get_type), (gst_ffmpeg_dct_algo_get_type),
(gst_ffmpeg_idct_algo_get_type), (gst_ffmpeg_quant_type_get_type),
(gst_ffmpeg_pre_me_get_type), (gst_ffmpeg_pred_method_get_type),
(gst_ffmpeg_flags_get_type), (gst_ffmpeg_cfg_init),
(gst_ffmpeg_cfg_codec_has_pspec),
(gst_ffmpeg_cfg_install_property), (gst_ffmpeg_cfg_set_property),
(gst_ffmpeg_cfg_get_property), (gst_ffmpeg_cfg_set_defaults),
(gst_ffmpeg_cfg_fill_context):
* ext/ffmpeg/gstffmpegcfg.h:
Added helper object to handle extra properties.
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_class_init),
(gst_ffmpegenc_init), (gst_ffmpegenc_dispose),
(gst_ffmpegenc_getcaps), (gst_ffmpegenc_setcaps),
(gst_ffmpegenc_chain_video), (gst_ffmpegenc_chain_audio),
(gst_ffmpegenc_flush_buffers), (gst_ffmpegenc_event_video),
(gst_ffmpegenc_set_property), (gst_ffmpegenc_get_property),
(gst_ffmpegenc_change_state), (gst_ffmpegenc_register):
* ext/ffmpeg/gstffmpegenc.h:
Exposes (quite some of) the AVCodecContext configurable
settings, as well as some additional (though simple) logic for b-frame
delay handling.
Most of the properties are only enabled for mpeg4-like codecs.
Fixes#344583.
Original commit message from CVS:
Patch by: Mark Nauwelaerts <manauw at skynet dot be>
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_setcaps):
If we are not operating in RTP mode, leave the default rtp encoder
settings as they are so that we don't unintentionally activate it.
Fixes#351415.
Original commit message from CVS:
Reviewed by : Edward Hervey <edward@fluendo.com>
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_chain_audio):
Fix segmentation fault and memleak.
Fixes#332995 and #333001
Original commit message from CVS:
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_caps_to_pixfmt):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_getcaps):
respect pixel-aspect-ratio when encoding.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_class_init),
(gst_ffmpegenc_init), (gst_ffmpegenc_setcaps):
debug and magic number fixes
Original commit message from CVS:
Reviewed by : Edward Hervey <edward@fluendo.com>
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_chain_audio):
Caps weren't set on outgoing audio buffers.
Closes#327861
Original commit message from CVS:
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_codecid_to_caps):
we have better ways of debugging caps
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_setcaps):
ye gods. get_template_caps doesn't return a ref, so when the
pad was not linked, crashes would ensue. Serves me right.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_setcaps):
Do not limit quantizer values so we can get realy low
bitrates.
Original commit message from CVS:
* ext/ffmpeg/gstffmpeg.c: (gst_ffmpeg_log_callback), (plugin_init):
* ext/ffmpeg/gstffmpeg.h:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_getcaps):
shut up the logging while it's probing for formats
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_setcaps),
(gst_ffmpegenc_chain_video), (gst_ffmpegenc_change_state):
Fix return values from the setcaps function.
Original commit message from CVS:
Reviewed by: Luca Ognibene <luogni@tin.it>
* ext/ffmpeg/gstffmpegenc.c (gst_ffmpegenc_chain_video):
set the GST_BUFFER_DELTA_UNIT while encoding
fix#308804
Original commit message from CVS:
* configure.ac:
scale requires -libs (video.h).
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_getcaps):
Don't crash if open failed.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c (gst_ffmpegenc_chain_video):
* ext/ffmpeg/gstffmpegdec.c (gst_ffmpegdec_chain):
Makes ffmpegdec and ffmpegenc use these functions
and remove a comment from a previuos patch
* ext/ffmpeg/gstffmpegcodecmap.h:
Add two utility functions to convert the pts from/to
the ffmpeg format
Original commit message from CVS:
Reviewed by: Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_getcaps):
Don't crash if avcodec_open failed (#301717).
Original commit message from CVS:
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_codecid_to_caps),
(gst_ffmpeg_caps_with_codecid), (gst_ffmpeg_caps_to_codecid),
(gst_ffmpeg_get_codecid_longname):
Add ALAC, shorten and some more in new FFMPEG snapshot of
21/4, somewhere this afternoon.
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_register):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_register):
Add warnings to decoder registration to easier add new ones
during snapshot updates.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_codecid_to_caps),
(gst_ffmpeg_caps_to_codecid):
Add AMR mimetypes (since those are recognized in ffmpeg).
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_frame),
(gst_ffmpegdec_register):
* ext/ffmpeg/gstffmpegdemux.c: (gst_ffmpegdemux_register):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_register):
Register law codecs too, add time debug. Use ANY for template caps
since we don't necessarily have available decoders for recognized
formats.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_init),
(gst_ffmpegenc_link), (gst_ffmpegenc_chain_video):
Remove EMU_EDGE, since that really fixes#162905. Revert
previous hacks.
Original commit message from CVS:
Reviewed by: Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_link),
(gst_ffmpegenc_chain_video):
Workaround memory issues (#162905).
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_base_init),
(gst_ffmpegenc_init), (gst_ffmpegenc_getcaps),
(gst_ffmpegenc_link):
Move setup of sink caps (accepted formats) to a separate function
rather than doing it on initialization.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_init),
(gst_ffmpegenc_chain_video):
Set chain function before adding pad, fix memleak on error, error
out on encode errors because none of subsequent frames will work
any better (this is not input dependent).
Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c
* ext/ffmpeg/gstffmpegenc.c
change plugins category to meet our new naming standard :
Codec/Encoder|Decoder/Audio|Video
suggested by bilboed, approved by Company
Original commit message from CVS:
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_get_palette),
(gst_ffmpeg_set_palette), (gst_ffmpeg_codecid_to_caps),
(gst_ffmpeg_pixfmt_to_caps), (gst_ffmpeg_caps_to_smpfmt),
(gst_ffmpeg_caps_to_pixfmt), (gst_ffmpeg_caps_with_codectype),
(gst_ffmpeg_caps_with_codecid), (gst_ffmpeg_caps_to_codecid):
* ext/ffmpeg/gstffmpegcodecmap.h:
Change some function names to reflect that they don't really
_return_ something, but rather _use_ something to fill a
AVCodecContext. s/to/with/. Restructure the extradata handling,
it's now not picking up the type from the caps but rather
using the type as provided in the function. This is a lot
cleaner. Implement MS RLE palette pickup.
* ext/ffmpeg/gstffmpegcolorspace.c: (gst_ffmpegcsp_pad_link):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_connect):
Sync with the above function name changes.
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_close),
(gst_ffmpegdec_open), (gst_ffmpegdec_connect),
(gst_ffmpegdec_chain), (gst_ffmpegdec_change_state):
Add some hacks to convert palette-based raw image formats to
RGBA32. Ugly, but I don't know how else to handle palette-based
RGB, since img_convert() (and thus ffcolorspace) doesn't accept
a palette as argument.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_base_init):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_base_init):
Fix category.
* ext/ffmpeg/gstffmpegdemux.c: (gst_ffmpegdemux_class_init),
(gst_ffmpegdemux_init), (gst_ffmpegdemux_close):
Slightly rewrite the init function, old one was ugly. Also remove
dispose function since it's obsolete, the change_state function
cleans up already. Also fixes segfault in test-app
gstreamer/tests/instantiate/create
Original commit message from CVS:
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_codecid_to_caps):
* ext/ffmpeg/gstffmpegcodecmap.h:
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_chain),
(gst_ffmpegdec_register):
* ext/ffmpeg/gstffmpegdemux.c: (gst_ffmpegdemux_add),
(gst_ffmpegdemux_register):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_connect),
(gst_ffmpegenc_register):
* ext/ffmpeg/gstffmpegmux.c: (gst_ffmpegmux_register):
Add encode property to codec mapper, so we can get better-fitting
caps. Also use this everywhere. ;). Lastly, add some new codecIDs
to our list of recognized ones.
Original commit message from CVS:
2004-01-16 Ronald Bultje <rbultje@ronald.bitfreak.net>
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_connect):
Link with right caps (else, it segfaults).
* ext/mplex/gstmplexjob.cc:
Fix for slight API change in 1.6.1.93 release of mjpegtools.
Original commit message from CVS:
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_connect):
Fix pad_link function to handle formats that ffmpeg returns
as multiple caps structures.
* gst/videofilter/gstvideofilter.c: (gst_videofilter_chain):
Only complain if source buffer is _smaller_ than expected.
* gst/videoscale/gstvideoscale.c: (gst_videoscale_init),
(gst_videoscale_handle_src_event): Resize navigation events
when passing them upstream.
* gst/videotestsrc/gstvideotestsrc.c:
* gst/videotestsrc/gstvideotestsrc.h:
* gst/videotestsrc/videotestsrc.c:
* gst/videotestsrc/videotestsrc.h:
Rewrite many of the buffer painting functions to handle odd
sizes (for many formats, size%4!=0 or size%8!=0). Most have
been verified to work with my video card.
* testsuite/gst-lint: Add check for elements calling
gst_pad_get_caps() instead of gst_pad_get_allowed_caps().
Original commit message from CVS:
2004-01-01 Ronald Bultje <rbultje@ronald.bitfreak.net>
* configure.ac:
Fix configure check for mpeg2enc. We need 1.6.1.93 instead of
1.6.1.92, since the pkg-config file of 1.6.1.92 is borked and
it therefore uses the wrong include paths. Too bad... Note
that 1.6.1.93 is not release yet. ;).
Also add a check for mplex, which is now using the lib'ified
mplex from mjpegtools, too.
* ext/ffmpeg/gstffmpegcodecmap.c:
Add codec_tag for 3ivx/xvid. For xvid, this should fix playback
issues. I don't think ffmpeg handles 3ivx correctly, so this
probably won't work. But it won't hurt either.
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_connect),
(gst_ffmpegdec_chain):
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_connect),
(gst_ffmpegenc_chain_audio):
Fix memleak in audio encoding. Close codec if open fails, this
calls the cleanup routines so we can re-use the context.
* ext/mpeg2enc/gstmpeg2enc.cc:
Fix pad template names/types, fix memory issue with getcaps().
* ext/mpeg2enc/gstmpeg2encoder.cc:
* ext/mpeg2enc/gstmpeg2encoder.hh:
Fix compile issue with new caps system (const thingy).
* ext/mpeg2enc/gstmpeg2encpicturereader.cc:
* ext/mpeg2enc/gstmpeg2encpicturereader.hh:
We read a first frame right on initing, so that we have a caps
when we init the output. This caps is cached in padprivate and
read as first frame.
* ext/mplex/Makefile.am:
* ext/mplex/gstmplex.cc:
* ext/mplex/gstmplex.h:
* ext/mplex/gstmplex.hh:
* ext/mplex/gstmplexibitstream.cc:
* ext/mplex/gstmplexibitstream.hh:
* ext/mplex/gstmplexjob.cc:
* ext/mplex/gstmplexjob.hh:
* ext/mplex/gstmplexoutputstream.cc:
* ext/mplex/gstmplexoutputstream.hh:
We wrap mjpegtools mplex. So I rewrote the plugin. The old plugin
had issues, didn't do capsnego, supported only a subset of the
mplex features and required a mplex fork in our local CVS. Plus
that it worked agaist a very old mplex version. Rewriting was
faster than updating it.
* gst-libs/ext/Makefile.am:
* gst-libs/ext/mplex/INSTRUCT:
* gst-libs/ext/mplex/Makefile.am:
* gst-libs/ext/mplex/README:
* gst-libs/ext/mplex/TODO:
* gst-libs/ext/mplex/ac3strm_in.cc:
* gst-libs/ext/mplex/audiostrm.hh:
* gst-libs/ext/mplex/audiostrm_out.cc:
* gst-libs/ext/mplex/aunit.hh:
* gst-libs/ext/mplex/bits.cc:
* gst-libs/ext/mplex/bits.hh:
* gst-libs/ext/mplex/buffer.cc:
* gst-libs/ext/mplex/buffer.hh:
* gst-libs/ext/mplex/fastintfns.h:
* gst-libs/ext/mplex/format_codes.h:
* gst-libs/ext/mplex/inputstrm.cc:
* gst-libs/ext/mplex/inputstrm.hh:
* gst-libs/ext/mplex/lpcmstrm_in.cc:
* gst-libs/ext/mplex/mjpeg_logging.cc:
* gst-libs/ext/mplex/mjpeg_logging.h:
* gst-libs/ext/mplex/mjpeg_types.h:
* gst-libs/ext/mplex/mpastrm_in.cc:
* gst-libs/ext/mplex/mpegconsts.cc:
* gst-libs/ext/mplex/mpegconsts.h:
* gst-libs/ext/mplex/mplexconsts.hh:
* gst-libs/ext/mplex/multplex.cc:
* gst-libs/ext/mplex/outputstream.hh:
* gst-libs/ext/mplex/padstrm.cc:
* gst-libs/ext/mplex/padstrm.hh:
* gst-libs/ext/mplex/stillsstream.cc:
* gst-libs/ext/mplex/stillsstream.hh:
* gst-libs/ext/mplex/systems.cc:
* gst-libs/ext/mplex/systems.hh:
* gst-libs/ext/mplex/vector.cc:
* gst-libs/ext/mplex/vector.hh:
* gst-libs/ext/mplex/videostrm.hh:
* gst-libs/ext/mplex/videostrm_in.cc:
* gst-libs/ext/mplex/videostrm_out.cc:
* gst-libs/ext/mplex/yuv4mpeg.cc:
* gst-libs/ext/mplex/yuv4mpeg.h:
* gst-libs/ext/mplex/yuv4mpeg_intern.h:
* gst-libs/ext/mplex/yuv4mpeg_ratio.cc:
We don't fork mjpegtools' mplex in our CVS anymore.
* gst/avi/gstavidemux.c: (gst_avi_demux_src_getcaps),
(gst_avi_demux_add_stream):
* gst/avi/gstavidemux.h:
Add getcaps() function for proper caps nego. This makes some
parts of AVI playback/reading work.
* sys/ximage/ximagesink.c: (gst_ximagesink_sinkconnect):
Resize window on new capsnego. This is probably wrong, but
I'm still committing it because with current capsnego, the
first successfull capsnego is auto-fixated, therefore rounded
down to the lowest values in the caps. this results in a 16x16
XWindow that is not reized when real capsnego finishes.
Dave, I see more cases of this, do you know a proper solution?
* tools/gst-launch-ext.in:
Fix MPEG-4 AAC (Apple iPod/iTunes) file commandline.
Original commit message from CVS:
Several encoding changes:
* for video, double check the pix_fmt after opening the AVCodec. The pix_fmt
will be changed to the preferred pix_fmt instead of that opening the
codec fails. We fail when it has changed (then, ffmpeg doesn't like it).
* for video, set the correct timestamp.
* for audio, do *not* set the frame_size: most codecs don't like it. Instead,
keep a cache of buffers and always give data of size "frame_size". Maybe
I should have used bytestream here, I'm not sure. This works, though.
I can now create mpeg1 video, mp2 and ac3 audio. I didn't test any others yet.
I also didn't start working on integration with any of the muxers yet, that's
all one big TODO. One thing at a time, please. :).
Original commit message from CVS:
Make it compile against latest CVS of FFMPEG:
* Put gst/gst.h above avcodec.h because it needs some types defined in glib.h
* Remove HQ (removed from lavc) property
Also add some functions to make SVQ1 decoding work:
* Add YUV9 colorspace
* Let lavc do its own buffer allocation and copy from there instead of using
our own buffer allocation functions. Somehow, that breaks. I don't know
why.
Original commit message from CVS:
Typo (> instead of <) in codec selection (we don't want raw audio to raw audio encoders), and small improvement in naming of the FFMPEG encoders. This makes their naming look slightly better in apps using element_factory->details->longname.
Original commit message from CVS:
compatibility fix for new GST_DEBUG stuff.
Includes fixes for missing includes for config.h and unistd.h
I only ensured for plugins I can build that they work, so if some of them are still broken, you gotta fix them yourselves unfortunately.
Original commit message from CVS:
* remove gstffmpegdecall. This was a temporary hack to get around
some issues with our video/avi-centered mimetype system. Now that
we use proper identifiers, we don't need that piece of cruft anymore.
* update ffmpeg codec map for ffdec_*, plus make the uncompressed stream
caps also be formed by the codec mapper (this is easier to handle imo).
* add audio support (untested, though :P).
* remove the copying of buffer content and add a get_buffer() handler
instead.
* add an int to ffmpegenc to make it compile and resolve the symbol. I'll
truely fix that later on.
* make mimetypes in the ffmpeg codec mapper conform to docs/random/mimetypes
* etc.
Oh, and let's not forget that it can play back DIVX5 et all nicely. Support
for SVQ1/3 is also there, so if someone completes qtdemux, we can watch
these, too.
Original commit message from CVS:
another batch of connect->link fixes
please let me know about issues
and please refrain of making them yourself, so that I don't spend double
the time resolving conflicts
Original commit message from CVS:
Release early.. try to wrap more ffmpeg stuff, like muxers and demuxers.
This thing needs a fix in ffmpeg (which I will send to the ffmpeg authors
eventually)
Original commit message from CVS:
* removal of //-style comments
* don't link plugins to core libs -- the versioning is done internally to the plugins with the plugin_info struct,
and symbol resolution is lazy, so we can always know if a plugin can be loaded by the plugin_info data. in theory.
