Monty [Thu, 11 Mar 2010 07:41:42 +0000 (07:41 +0000)]
Get the management numbers for 5.1 a little closer to 'in the ballpark'.
svn path=/trunk/vorbis/; revision=16963
Monty [Thu, 11 Mar 2010 07:30:34 +0000 (07:30 +0000)]
Commit a first cut of 5.1 tuning.
One last thing to try, aside from a longer training run, would be to use pairwise L/R
codebooks on uncoupled data in higher q modes, where the 'stereo abuse' strategy worked well,
probably due more to codebooks backend than the stereo coupling pairs.
svn path=/trunk/vorbis/; revision=16962
Monty [Thu, 11 Mar 2010 07:15:40 +0000 (07:15 +0000)]
Add new book geenration descriptions
Remove more dead utils
svn path=/trunk/vorbis/; revision=16961
Monty [Wed, 10 Mar 2010 16:03:11 +0000 (16:03 +0000)]
Update the VQ tools to pared down codebook abstraction.
Eliminate long unused tools; they're still in SVN.
svn path=/trunk/vorbis/; revision=16959
Monty [Tue, 9 Mar 2010 18:45:14 +0000 (18:45 +0000)]
Missed an errant useless float var in encode-side codebook lookup
svn path=/trunk/vorbis/; revision=16958
Monty [Tue, 9 Mar 2010 17:13:11 +0000 (17:13 +0000)]
Extend residue2 setup code to work with non-stereo bundles
svn path=/trunk/vorbis/; revision=16957
Monty [Tue, 9 Mar 2010 16:05:44 +0000 (16:05 +0000)]
Add some unneccessary but potentially useful bulletproofing to allow use of versized floors in
floor1 on encode side (already worked properly decode-side).
svn path=/trunk/vorbis/; revision=16956
Monty [Thu, 4 Mar 2010 18:21:43 +0000 (18:21 +0000)]
Correct numerous small bugs in new coupling engine
svn path=/trunk/vorbis/; revision=16950
Monty [Wed, 3 Mar 2010 16:12:40 +0000 (16:12 +0000)]
New noise norm, coupling and quant code necessary for depth>1 coupling. Also substantially
cleans up the old code for mono/stereo usage.
svn path=/trunk/vorbis/; revision=16946
Monty [Mon, 1 Mar 2010 11:33:57 +0000 (11:33 +0000)]
Correct an error in the integer work buffer allocation
svn path=/trunk/vorbis/; revision=16941
Monty [Mon, 1 Mar 2010 11:24:39 +0000 (11:24 +0000)]
Move partition calssification metrics to integer as the actual
operations were integer anyway.
svn path=/trunk/vorbis/; revision=16940
Monty [Mon, 1 Mar 2010 08:38:14 +0000 (08:38 +0000)]
Some significant encoder-side codebook cleanup toward new surround code
landing.
This is primarily elimination of dead code and useless float vectors
that are of no use given the current encoder codebook strategy.
svn path=/trunk/vorbis/; revision=16939
Monty [Fri, 19 Feb 2010 02:49:25 +0000 (02:49 +0000)]
Correct a setup 'bug' that doesn't affect anything in current encoder, but could certainly be
annoying when surround lands.
svn path=/trunk/vorbis/; revision=16921
Cristian Adam [Thu, 18 Feb 2010 17:10:47 +0000 (17:10 +0000)]
Removed Release_SSE and Release SSE2 configurations. Changed Windows Mobile 5.0 configuration from "Pocket PC SDK 2 (ARMV4I)" to "Pocket PC SDK (ARMV4I)", version "2" was generated by versions of Windows Mobile 5.0 SDK which are no longer available on MSDN.
svn path=/trunk/vorbis/; revision=16912
Monty [Wed, 17 Feb 2010 18:52:33 +0000 (18:52 +0000)]
not closing the name tag freaks out the style sheet
svn path=/trunk/vorbis/; revision=16907
Monty [Wed, 17 Feb 2010 18:48:21 +0000 (18:48 +0000)]
Add a useful anchor
svn path=/trunk/vorbis/; revision=16906
Monty [Sat, 13 Feb 2010 19:26:42 +0000 (19:26 +0000)]
The rounding can cause a surprising amount of trouble in book creation.
svn path=/trunk/vorbis/; revision=16897
Monty [Sat, 13 Feb 2010 06:47:54 +0000 (06:47 +0000)]
Correct some amount of minor bitrot in the codebook training code
svn path=/trunk/vorbis/; revision=16895
Monty [Fri, 12 Feb 2010 20:32:12 +0000 (20:32 +0000)]
Some minor setup code rearrangement/cleanup toward 5.1/7.1 additions
svn path=/trunk/vorbis/; revision=16894
Monty [Tue, 26 Jan 2010 02:40:41 +0000 (02:40 +0000)]
Commit channel ordering clarifications to libvorbisfile doc
svn path=/trunk/vorbis/; revision=16805
Monty [Tue, 26 Jan 2010 02:28:40 +0000 (02:28 +0000)]
Add minor clarifications to channel ordering docs
svn path=/trunk/vorbis/; revision=16804
Ralph Giles [Wed, 20 Jan 2010 01:42:54 +0000 (01:42 +0000)]
Remove a misleading comment about VBR quality request range.
The documentation says the range is -0.1 to 1.0, but these comments
started the range at 0.0. Against expectations, it looks like the
documentation is correct.
Patch from Douglas Bagnall <douglas@paradise.net.nz>.
svn path=/trunk/vorbis/; revision=16790
Ralph Giles [Wed, 20 Jan 2010 01:41:23 +0000 (01:41 +0000)]
Shift vorbisenc API docs into doxygen 2/2 (add doxygen)
Until now the libvorbisenc API has been documented via static html
pages in doc/vorbisenc/. This patch moves that documentation into the
vorbisenc.h header.
For the most part, the text was copied unchanged, except where doxygen
was better able to say something in its own way. For example, the
\deprecated tag changed the format of deprecation messages. A few
trivial misspelling's were fixed, including some that doxygen caught.
Some of the narrative flow of the original was lost, as doxygen
reorders documentation according to its own plan, so I changed a few
phrases on account of this loss of context.
Some ordinary comments in the header were obviated by the doxygen and
removed.
Neither the overview documentation in overview.html nor the examples
in examples.html are included in the header, nor are the functions
that are exposed by including vorbisenc.h but which are actually
declared in codecs.h.
Patch from Douglas Bagnall <douglas@paradise.net.nz>.
svn path=/trunk/vorbis/; revision=16789
Ralph Giles [Wed, 20 Jan 2010 01:36:04 +0000 (01:36 +0000)]
Shift vorbisenc API docs into doxygen 1/2 (reorder defines)
In order to group the documentation of the OV_ECTL_* constants used
with vorbis_encode_ctl, their definitions need to be adjacent.
This patch only moves the defines; the next only touches comments.
Patch from Douglas Bagnall <douglas@paradise.net.nz>.
svn path=/trunk/vorbis/; revision=16788
j [Fri, 15 Jan 2010 02:40:38 +0000 (02:40 +0000)]
set HAVE_DOXYGEN=false in else
svn path=/trunk/vorbis/; revision=16786
Ralph Giles [Fri, 15 Jan 2010 02:31:15 +0000 (02:31 +0000)]
Define the HAVE_DOXYGEN conditional unconditionally so the configure
script completes even with --disable-docs.
svn path=/trunk/vorbis/; revision=16785
j [Thu, 14 Jan 2010 23:42:27 +0000 (23:42 +0000)]
add doxygen build system
svn path=/trunk/vorbis/; revision=16784
Monty [Thu, 14 Jan 2010 02:34:05 +0000 (02:34 +0000)]
Add official channel ordering/location for 6.1/7.1 surround.
svn path=/trunk/vorbis/; revision=16781
Ralph Giles [Sat, 19 Dec 2009 08:26:06 +0000 (08:26 +0000)]
Cleanup pass on the vorbisenc documentation.
svn path=/trunk/vorbis/; revision=16757
Ralph Giles [Sat, 19 Dec 2009 07:59:52 +0000 (07:59 +0000)]
Add rough reference documentation for the main encoding calls.
These are a bit rough in that the main calls are declared in codec.h,
and not vorbisenc.h as one might expect for the encoder. Nevertheless
I felt this was helpful to those trying to use the encoder since there
is no 'Programming with libvorbis' documenation at all.
The error return values listed don't entirely match what the code will
actually provide, but they're all good ones to check for anyway.
Note of the new pages have hyperlinked function or structure names.
svn path=/trunk/vorbis/; revision=16756
Ralph Giles [Sat, 19 Dec 2009 06:15:44 +0000 (06:15 +0000)]
Documenation fix: functions are in vorbisfile.h, not libvorbisfile.h.
svn path=/trunk/vorbis/; revision=16755
Cristian Adam [Wed, 25 Nov 2009 23:04:24 +0000 (23:04 +0000)]
linked statically to c runtime for windows mobile.
svn path=/trunk/vorbis/; revision=16724
Mike Smith [Fri, 13 Nov 2009 22:53:10 +0000 (22:53 +0000)]
Put in the magic maintainer-mode invocation to configure.ac, otherwise sometimes
autotools goes off into a corner and shoots itself.
svn path=/trunk/vorbis/; revision=16701
Tim Terriberry [Thu, 1 Oct 2009 02:54:22 +0000 (02:54 +0000)]
Don't allow ordered codebooks with codeword lengths longer than 32 bits.
svn path=/trunk/vorbis/; revision=16597
Cristian Adam [Tue, 29 Sep 2009 22:46:15 +0000 (22:46 +0000)]
Changed the C runtime library to the default option - dynamic runtime library.
svn path=/trunk/vorbis/; revision=16595
j [Mon, 28 Sep 2009 16:54:28 +0000 (16:54 +0000)]
add pkg.m4 to vorbis, that way ./autogen.sh works on systems that dont have pkg-config installed
svn path=/trunk/vorbis/; revision=16592
Monty [Sat, 12 Sep 2009 02:09:04 +0000 (02:09 +0000)]
Modify fix for Trac #1572; some files from the earliest beta
accidentally used an oversized phrasebook in res decode; allow these
[technically corrept] files to play. The attack fix is still
watertight, the check is simply made in a different way.
svn path=/trunk/vorbis/; revision=16552
Cristian Adam [Sat, 25 Jul 2009 22:52:38 +0000 (22:52 +0000)]
Bumped libogg version to 1.1.4 and fixed dynamic compilation because of missing export function.
svn path=/trunk/vorbis/; revision=16335
Monty [Fri, 24 Jul 2009 01:58:50 +0000 (01:58 +0000)]
More extensive / difficult to abuse version of #1573 fix. Makes it abunduntly clear that the DSP state is uninitialized.
svn path=/trunk/vorbis/; revision=16330
Monty [Fri, 24 Jul 2009 01:53:20 +0000 (01:53 +0000)]
Similarly check for error in seeking_example
svn path=/trunk/vorbis/; revision=16329
Monty [Fri, 24 Jul 2009 01:51:10 +0000 (01:51 +0000)]
Fix for Trac #1573.
This is two bugs. The first is that vorbisfile_example.c ignores an
error code and plows ahead blindly if libvorbisfile reports the
current bitstream section is bad (OV_EBADLINK).
The second is that retrying after the error crashes libvorbisfile due
to the unitialized state.
svn path=/trunk/vorbis/; revision=16328
Monty [Fri, 24 Jul 2009 00:49:25 +0000 (00:49 +0000)]
Commit fix to Trac #1572; the erroneous setup was being checked for, but not completely.
svn path=/trunk/vorbis/; revision=16327
Monty [Fri, 24 Jul 2009 00:06:53 +0000 (00:06 +0000)]
Eliminate possibility of booklist overflow in res0/1/2 unpacking.
svn path=/trunk/vorbis/; revision=16326
Monty [Fri, 10 Jul 2009 03:19:29 +0000 (03:19 +0000)]
Eliminate a correct but harmless 'unititialized variable' warning from libvorbisfile compile.
svn path=/trunk/vorbis/; revision=16246
Monty [Fri, 10 Jul 2009 02:49:31 +0000 (02:49 +0000)]
Bump build system versions for release
Move the OV_EXCLUDE_STATIC_CALLBACKS define up to fix another symbol
warning ala Trac #1560
svn path=/trunk/vorbis/; revision=16243
Monty [Wed, 8 Jul 2009 08:37:34 +0000 (08:37 +0000)]
Commit a vorbisfile short-file fix; consists of several fixes to reinitialization post-seek. Fixes gentoo BZ# 276594
Important fix for games that use many small sound files; necessary to fix playback for single-audio-page Vorbis files.
svn path=/trunk/vorbis/; revision=16228
Monty [Wed, 8 Jul 2009 06:58:46 +0000 (06:58 +0000)]
Remove trailing whitespace
svn path=/trunk/vorbis/; revision=16227
Monty [Wed, 8 Jul 2009 06:43:49 +0000 (06:43 +0000)]
analysis output / trailing whitespace cleanup
svn path=/trunk/vorbis/; revision=16226
Monty [Wed, 8 Jul 2009 06:30:11 +0000 (06:30 +0000)]
Trac #1549; enable slower but higher precision floor 0 LSP code.
Modern CPUs are fast enough to not even notice.
svn path=/trunk/vorbis/; revision=16225
Monty [Wed, 8 Jul 2009 06:24:49 +0000 (06:24 +0000)]
applied Trac #1548
svn path=/trunk/vorbis/; revision=16224
Monty [Wed, 8 Jul 2009 06:21:02 +0000 (06:21 +0000)]
correct FPU control word setting bug (Trac #1547)
svn path=/trunk/vorbis/; revision=16223
Monty [Wed, 8 Jul 2009 05:37:18 +0000 (05:37 +0000)]
Commit additional hardening to seyup packet decode; some of the checks are redundant, but possibly a good proof against future changes.
svn path=/trunk/vorbis/; revision=16222
Monty [Tue, 7 Jul 2009 23:18:05 +0000 (23:18 +0000)]
Fix for Mozilla BZ #501279
Will need to review/patch Tremor as well, more thorough pattern review
of unpacking in the face of incomplete header packets in progress in
mainline as well.
svn path=/trunk/vorbis/; revision=16218
Monty [Tue, 7 Jul 2009 22:44:49 +0000 (22:44 +0000)]
Correct a potential* comment length sanity check overflow.
*as defined by the Derf Convention.
svn path=/trunk/vorbis/; revision=16217
Monty [Tue, 7 Jul 2009 22:41:22 +0000 (22:41 +0000)]
Kick things off with a version bump
svn path=/trunk/vorbis/; revision=16216
Monty [Thu, 25 Jun 2009 04:11:27 +0000 (04:11 +0000)]
Commit updates to the Vorbis I spec highlighting rejection cases
fixed in r16181 and 16182.
svn path=/trunk/vorbis/; revision=16183
Monty [Thu, 25 Jun 2009 03:53:49 +0000 (03:53 +0000)]
Second half of fix to Mozilla BZ # 5000254: sanity check the floor 1
post list to reject files with repeated values that would result in
floor line segments with zero length.
svn path=/trunk/vorbis/; revision=16182
Monty [Thu, 25 Jun 2009 03:39:41 +0000 (03:39 +0000)]
First half of fix for Mozilla BZ #500254
Residue code was not checking that its partition books were books with
specified/populated value mappings. Fuzzer twiddled the book table suck that a valid codebook was being swapped out for a codebook with no value mapping.
svn path=/trunk/vorbis/; revision=16181
Monty [Tue, 23 Jun 2009 15:59:50 +0000 (15:59 +0000)]
Update CHANGES for release
svn path=/trunk/vorbis/; revision=16168
Monty [Tue, 23 Jun 2009 15:37:48 +0000 (15:37 +0000)]
Update macosx info.plist
svn path=/trunk/vorbis/; revision=16162
Monty [Tue, 23 Jun 2009 15:29:56 +0000 (15:29 +0000)]
Oops, missed version update in configure.ac
svn path=/trunk/vorbis/; revision=16157
Monty [Tue, 23 Jun 2009 15:26:54 +0000 (15:26 +0000)]
Bump lib version for full release.
svn path=/trunk/vorbis/; revision=16155
Monty [Wed, 3 Jun 2009 05:10:49 +0000 (05:10 +0000)]
Bump versions for release candidate. This time for real.
svn path=/trunk/vorbis/; revision=16077
Monty [Tue, 2 Jun 2009 23:26:24 +0000 (23:26 +0000)]
Handle the case of single-entry codebooks; this had been broken accidentally in earlier security fixes. Resolves GNOME 582942, thanks for the additional file to add to regression testing.
svn path=/trunk/vorbis/; revision=16073
Monty [Wed, 27 May 2009 21:13:14 +0000 (21:13 +0000)]
Vorbis spec tex file patch from Max Horn
resolves bug #1541
svn path=/trunk/vorbis/; revision=16055
Monty [Tue, 26 May 2009 21:10:58 +0000 (21:10 +0000)]
global replaced all tabs with whitespaces in the source to end some of
the ongoing formatting silliness.
...with apologies to the havoc this will wreak on svn blame being useful.
svn path=/trunk/vorbis/; revision=16037
Monty [Thu, 14 May 2009 21:48:06 +0000 (21:48 +0000)]
Bump vendor string for 1.2.2 rc 1
svn path=/trunk/vorbis/; revision=16006
Monty [Thu, 14 May 2009 19:56:55 +0000 (19:56 +0000)]
Remove obsolete/unsupported MS build targets to avoid sucking unsuspecting users into a tarpit.
svn path=/trunk/vorbis/; revision=16000
Ralph Giles [Tue, 12 May 2009 16:11:53 +0000 (16:11 +0000)]
Fix some comment typos and spacing.
svn path=/trunk/vorbis/; revision=15996
Cristian Adam [Fri, 1 May 2009 11:56:03 +0000 (11:56 +0000)]
Removed WholeProgramOptimization setting from static library project.
svn path=/trunk/vorbis/; revision=15975
Monty [Mon, 27 Apr 2009 22:12:58 +0000 (22:12 +0000)]
wrapped vorbisfile.h static callbacks in #ifndef
OV_EXCLUDE_STATIC_CALLBACKS
svn path=/trunk/vorbis/; revision=15962
Monty [Mon, 27 Apr 2009 21:45:44 +0000 (21:45 +0000)]
fix to #1362
svn path=/trunk/vorbis/; revision=15961
Monty [Mon, 27 Apr 2009 20:17:14 +0000 (20:17 +0000)]
Attempted fix for #1377 and #1493
svn path=/trunk/vorbis/; revision=15960
Ralph Giles [Thu, 16 Apr 2009 17:00:44 +0000 (17:00 +0000)]
Const-ify some static data tables.
Patch from eldar. Trac issue #1496.
svn path=/trunk/vorbis/; revision=15937
Monty [Thu, 9 Apr 2009 16:35:52 +0000 (16:35 +0000)]
Correct another setup bug; extremely short links could get 'shadowed'
in the preferred serialno lookup if a backwards seek to find a
preceeding page goes back too far and lands in an entirely different
link.
svn path=/trunk/vorbis/; revision=15930
Monty [Thu, 9 Apr 2009 16:03:25 +0000 (16:03 +0000)]
Bugfix to new bisection code: fix end of data marker
Still failing several chaining test vectors, DO NOT USE YET
svn path=/trunk/vorbis/; revision=15929
Monty [Thu, 9 Apr 2009 15:34:27 +0000 (15:34 +0000)]
Complete first-cut rearrangement of bisection and initialization code to reduce stream seeks.
svn path=/trunk/vorbis/; revision=15928
Monty [Thu, 9 Apr 2009 09:02:06 +0000 (09:02 +0000)]
Nip a potential bug in the bud (open2 was relying on the position of the vf->offset cursor not being disturbed from open1)
Fill in offsets and dataoffsets fileds in VF struct, even for non-seekable streams.
svn path=/trunk/vorbis/; revision=15927
Monty [Thu, 9 Apr 2009 07:23:28 +0000 (07:23 +0000)]
Ongoing open refactoring to eliminate superfluous seeks and reads
during stream open
Move initial serial number cataloguing in each link to be part of the
inline header fetch process.
svn path=/trunk/vorbis/; revision=15926
Monty [Thu, 9 Apr 2009 05:52:38 +0000 (05:52 +0000)]
Add an optimization case to _get_prev_page that avoids a redundant seek/resync/reread in the common seek case.
svn path=/trunk/vorbis/; revision=15925
Monty [Wed, 8 Apr 2009 11:16:18 +0000 (11:16 +0000)]
set proper types on doc pngs
svn path=/trunk/vorbis/; revision=15924
Monty [Wed, 8 Apr 2009 02:29:31 +0000 (02:29 +0000)]
Patch an uninitialized trailing space in the ATH in very high sample rates found by Erik.
svn path=/trunk/vorbis/; revision=15923
Monty [Wed, 8 Apr 2009 01:46:27 +0000 (01:46 +0000)]
Update docs to eliminate typo that crept into LSP curve computation spec in the XML and latex versions of the doc.
svn path=/trunk/vorbis/; revision=15922
Monty [Wed, 8 Apr 2009 00:53:57 +0000 (00:53 +0000)]
Patch for "seek broken for large files and on pure 32 bit architectures"
svn path=/trunk/vorbis/; revision=15921
Monty [Wed, 8 Apr 2009 00:48:27 +0000 (00:48 +0000)]
Recompress PNGs as suggested in #1523, remove unused super-old Ogg logo
svn path=/trunk/vorbis/; revision=15920
Cristian Adam [Thu, 2 Apr 2009 14:52:43 +0000 (14:52 +0000)]
Added Visual Studio 2008 project files
svn path=/trunk/vorbis/; revision=15899
erikd [Fri, 6 Mar 2009 21:21:49 +0000 (21:21 +0000)]
Fix 'make distcheck'.
svn path=/trunk/vorbis/; revision=15754
Ralph Giles [Fri, 6 Mar 2009 19:44:16 +0000 (19:44 +0000)]
Use colored link text instead of boxes for hyperrefs in the pdf output.
svn path=/trunk/vorbis/; revision=15753
Ralph Giles [Fri, 6 Mar 2009 19:22:19 +0000 (19:22 +0000)]
pdflatex seems to want three invocations to get all the cross
references correct.
svn path=/trunk/vorbis/; revision=15752
Ralph Giles [Fri, 6 Mar 2009 19:20:41 +0000 (19:20 +0000)]
Correct in incorrect xref name.
svn path=/trunk/vorbis/; revision=15751
Ralph Giles [Fri, 6 Mar 2009 19:14:53 +0000 (19:14 +0000)]
Explicitly import the nameref TeX package.
On recent distributions, this is implied by using hyperref, but TeX Live
2007 doesn't import it.
svn path=/trunk/vorbis/; revision=15750
Ralph Giles [Fri, 6 Mar 2009 19:05:00 +0000 (19:05 +0000)]
Corresponding configure script changes for building the latex
specification. These were omitted in the previous commit.
svn path=/trunk/vorbis/; revision=15749
Ralph Giles [Fri, 6 Mar 2009 18:54:13 +0000 (18:54 +0000)]
Docbook to latex conversion of the spec by Max Horn.
We now build the specification document from latex source instead of the
older docbook method since may developers have had trouble getting the
docbook tools to work. It's also faster.
For now, the built documentation is still kept in svn and rebuilt only
if --enable-docs is passed to configure. We may relax this to rebuilding
only if the tools are available once we're more confident it will work
with common TeX installations.
svn path=/trunk/vorbis/; revision=15748
Ralph Giles [Fri, 6 Mar 2009 08:42:06 +0000 (08:42 +0000)]
Apply the same progressive automake ordering from r15745 to aclocal.
svn path=/trunk/vorbis/; revision=15747
Ralph Giles [Fri, 6 Mar 2009 07:55:09 +0000 (07:55 +0000)]
Check that the compiler supports -mv8 before adding it to the command
line on sun sparc. Issue #1458.
I haven't recieved confirmation this resolves the issue, but I don't see
how it can do much harm.
svn path=/trunk/vorbis/; revision=15746
Ralph Giles [Tue, 3 Mar 2009 18:37:43 +0000 (18:37 +0000)]
Minor changelog update.
svn path=/trunk/vorbis/; revision=15737
Cristian Adam [Mon, 9 Feb 2009 23:02:13 +0000 (23:02 +0000)]
one backslash too many
svn path=/trunk/vorbis/; revision=15685
Cristian Adam [Mon, 9 Feb 2009 22:21:14 +0000 (22:21 +0000)]
Some more clarifications (hopefully not clear as mud :)
svn path=/trunk/vorbis/; revision=15684
Cristian Adam [Sat, 7 Feb 2009 14:28:16 +0000 (14:28 +0000)]
Updated vsprops file and added a short README file which explains what to do in order to compile successfully from source distribution.
svn path=/trunk/vorbis/; revision=15682
erikd [Thu, 5 Feb 2009 07:06:20 +0000 (07:06 +0000)]
configure.ac : Make sure configure script is valid even if PKG_CHECK_MODULES can't be expanded by aclocal.
svn path=/trunk/vorbis/; revision=15658