libfaad FAQ, external FAAD info added back.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@11032 b3059339-0415-0410-9bf9-f77b7e298cf2

DOCS/xml/en/codecs.xml

@@ -720,6 +720,27 @@ files. An open source decoder called FAAD is available from
 <ulink url="http://www.audiocoding.com"/>.
 MPlayer includes libfaad 2.0RC1, so you do not need to get it separately.
 </para>
+
+<para>
+If you use gcc 3.2 which fails to compile our internal FAAD or want to use
+the external library for some other reason, download the library from the
+<ulink url="http://www.audiocoding.com/download.php">download page</ulink>
+and pass <option>--with-externalfaad</option> to <filename>configure</filename>.
+You do not need all of faad2 to decode AAC files, libfaad is enough. Build
+it like this:
+<screen>
+cd faad2/
+chmod +x bootstrap
+./bootstrap
+./configure
+cd libfaad
+make
+make install
+</screen>
+Binaries are not available from audiocoding.com, but you can (apt-)get Debian
+packages from <ulink url="http://marillat.free.fr">Christian Marillat's homepage</ulink>
+and Mandrake RPMs from the <ulink url="http://plf.zarb.org">P.L.F</ulink>.
+</para>
 </sect3>
 
 </sect2>

DOCS/xml/en/faq.xml

@@ -66,6 +66,32 @@ section for details.
 </para></answer>
 </qandaentry>
 
+<qandaentry>
+<question><para>
+Compilation stops with an error message similar to this one:
+<screen>
+    cfft.c: In function`passf2':
+    cfft.c:556: unable to find a register to spill in class `FLOAT_REGS'
+    cfft.c:556: this is the insn:
+    (insn 235 233 246 (set (subreg:SF (reg/v:DI 29 rmm0 [110]) 0)
+            (minus:SF (mem:SF (plus:SI (mult:SI (reg:SI 1 edx [112])
+                            (const_int 8 [0x8]))
+                        (reg/v/f:SI 3 ebx [62])) [4 S4 A32])
+                (reg:SF 8 st(0) [132]))) 533 {*fop_sf_1_nosse} (insn_list
+    232 (nil))    (expr_list:REG_DEAD (reg:SF 8 st(0) [132])
+            (nil)))
+    cfft.c:556: confused by earlier errors, bailing out
+</screen>
+</para></question>
+<answer><para>
+This is a known problem of <application>gcc</application> 3.2, upgrade
+to 3.3 to solve the problem. How to install gcc is described in the
+<link linkend="gcc-296">gcc 2.96</link> section. Alternatively you can use
+an external FAAD library as described in the
+<link linkend="aac">AAC</link> section. 
+</para></answer>
+</qandaentry>
+
 <qandaentry>
 <question><para>
 Compilation stops with an error message similar to this one: