Support building with system media libraries.
See <https://bugzilla.mozilla.org/show_bug.cgi?id=517422>

Based on:
  https://svnweb.freebsd.org/ports/head/www/firefox-esr/files/patch-z-bug517422?revision=472833&view=markup

Changes to files within the bundled libraries are omitted, since those files
are removed from Guix sources.  Modified for use with patch -p1, and to apply
cleanly to GNU IceCat.

--- icecat-60.5.0/build/moz.configure/old.configure
+++ icecat-60.5.0/build/moz.configure/old.configure
@@ -273,7 +273,12 @@
     '--with-system-libvpx',
     '--with-system-nspr',
     '--with-system-nss',
+    '--with-system-ogg',
     '--with-system-png',
+    '--with-system-soundtouch',
+    '--with-system-theora',
+    '--with-system-tremor',
+    '--with-system-vorbis',
     '--with-system-zlib',
     '--with-thumb',
     '--with-thumb-interwork',
--- icecat-60.5.0/config/external/moz.build
+++ icecat-60.5.0/config/external/moz.build
@@ -23,12 +23,21 @@
 
 external_dirs += ['modules/xz-embedded']
 
-if CONFIG['MOZ_VORBIS']:
+if not CONFIG['MOZ_SYSTEM_OGG']:
+    external_dir</td></tr></table>
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/platforms/ffmpeg/ffvpx/FFVPXRuntimeLinker.cpp
+++ icecat-60.5.0/dom/media/platforms/ffmpeg/ffvpx/FFVPXRuntimeLinker.cpp
@@ -15,9 +15,13 @@
 #include <windows.h>
 #endif
 
+#ifdef MOZ_SYSTEM_SOUNDTOUCH
+#include "nsXPCOMPrivate.h" // for XUL_DLL
+#else
 // We use a known symbol located in lgpllibs to determine its location.
 // soundtouch happens to be always included in lgpllibs
 #include "soundtouch/SoundTouch.h"
+#endif
 
 namespace mozilla {
 
@@ -60,6 +64,12 @@
 
   sLinkStatus = LinkStatus_FAILED;
 
+#ifdef MOZ_SYSTEM_SOUNDTOUCH
+  // We retrieve the path of the XUL library as this is where mozavcodec and
+  // mozavutil libs are located.
+  char* path =
+    PR_GetLibraryFilePathname(XUL_DLL, (PRFuncPtr)&FFVPXRuntimeLinker::Init);
+#else
   // We retrieve the path of the lgpllibs library as this is where mozavcodec
   // and mozavutil libs are located.
   PathString lgpllibsname = GetLibraryName(nullptr, "lgpllibs");
@@ -68,6 +78,7 @@
   }
   PathString path = GetLibraryFilePathname(
       lgpllibsname.get(), (PRFuncPtr)&soundtouch::SoundTouch::getVersionId);
+#endif
   if (path.IsEmpty()) {
     return false;
   }
--- icecat-60.5.0/old-configure.in
+++ icecat-60.5.0/old-configure.in
@@ -2417,6 +2417,111 @@
 fi
 fi # COMPILE_ENVIRONMENT
 
+dnl ========================================================
+dnl Check for libogg
+dnl ========================================================
+
+MOZ_ARG_WITH_BOOL(system-ogg,
+[  --with-system-ogg       Use system libogg (located with pkgconfig)],
+MOZ_SYSTEM_OGG=1,
+MOZ_SYSTEM_OGG=)
+
+if test -n "$MOZ_SYSTEM_OGG"; then
+    PKG_CHECK_MODULES(MOZ_OGG, ogg >= 1.3.3)
+
+    _SAVE_LIBS=$LIBS
+    LIBS="$LIBS $MOZ_OGG_LIBS"
+    AC_CHECK_FUNC(ogg_set_mem_functions, [],
+      [AC_DEFINE(MOZ_OGG_NO_MEM_REPORTING)])
+    LIBS=$_SAVE_LIBS
+fi
+
+AC_SUBST(MOZ_SYSTEM_OGG)
+
+dnl ========================================================
+dnl Check for libvorbis
+dnl ========================================================
+
+MOZ_ARG_WITH_BOOL(system-vorbis,
+[  --with-system-vorbis    Use system libvorbis (located with pkgconfig)],
+MOZ_SYSTEM_VORBIS=1,
+MOZ_SYSTEM_VORBIS=)
+
+if test -n "$MOZ_SYSTEM_VORBIS"; then
+    PKG_CHECK_MODULES(MOZ_VORBIS, vorbis vorbisenc >= 1.3.6)
+fi
+
+AC_SUBST(MOZ_SYSTEM_VORBIS)
+
+dnl ========================================================
+dnl Check for integer-only libvorbis aka tremor
+dnl ========================================================
+
+MOZ_ARG_WITH_BOOL(system-tremor,
+[  --with-system-tremor    Use system libtremor (located with pkgconfig)],
+MOZ_SYSTEM_TREMOR=1,
+MOZ_SYSTEM_TREMOR=)
+
+if test -n "$MOZ_SYSTEM_TREMOR"; then
+    PKG_CHECK_MODULES(MOZ_TREMOR, vorbisidec >= 1.2.1)
+fi
+
+AC_SUBST(MOZ_SYSTEM_TREMOR)
+
+dnl ========================================================
+dnl Check for libtheora
+dnl ========================================================
+
+MOZ_ARG_WITH_BOOL(system-theora,
+[  --with-system-theora    Use system libtheora (located with pkgconfig)],
+MOZ_SYSTEM_THEORA=1,
+MOZ_SYSTEM_THEORA=)
+
+if test -n "$MOZ_SYSTEM_THEORA"; then
+    PKG_CHECK_MODULES(MOZ_THEORA, theora >= 1.2)
+fi
+
+AC_SUBST(MOZ_SYSTEM_THEORA)
+
+dnl ========================================================
+dnl Check for libSoundTouch
+dnl ========================================================
+
+MOZ_ARG_WITH_BOOL(system-soundtouch,
+[  --with-system-soundtouch Use system libSoundTouch (located with pkgconfig)],
+MOZ_SYSTEM_SOUNDTOUCH=1,
+MOZ_SYSTEM_SOUNDTOUCH=)
+
+if test -n "$MOZ_SYSTEM_SOUNDTOUCH"; then
+    PKG_CHECK_MODULES(MOZ_SOUNDTOUCH, soundtouch >= 1.9.0)
+
+    AC_LANG_SAVE
+    AC_LANG_CPLUSPLUS
+    _SAVE_CXXFLAGS=$CXXFLAGS
+    CXXFLAGS="$CXXFLAGS $MOZ_SOUNDTOUCH_CFLAGS"
+    AC_CACHE_CHECK(for soundtouch sample type,
+                   ac_cv_soundtouch_sample_type,
+                   [AC_TRY_COMPILE([#include <SoundTouch.h>
+                                    #ifndef SOUNDTOUCH_INTEGER_SAMPLES
+                                    #error soundtouch expects float samples
+                                    #endif],
+                                   [],
+                                   [ac_cv_soundtouch_sample_type=short],
+                                   [ac_cv_soundtouch_sample_type=float])])
+    CXXFLAGS=$_SAVE_CXXFLAGS
+    AC_LANG_RESTORE
+
+    if test \( -n "$MOZ_SAMPLE_TYPE_S16" -a "$ac_cv_soundtouch_sample_type" != short \) \
+         -o \( -n "$MOZ_SAMPLE_TYPE_FLOAT32" -a "$ac_cv_soundtouch_sample_type" != float \) ; then
+        AC_MSG_ERROR([SoundTouch library is built with incompatible sample type. Either rebuild the library with/without --enable-integer-samples, chase default Mozilla sample type or remove --with-system-soundtouch.])
+    fi
+fi
+
+if test -n "$MOZ_SYSTEM_SOUNDTOUCH"; then
+    AC_DEFINE(MOZ_SYSTEM_SOUNDTOUCH)
+fi
+AC_SUBST(MOZ_SYSTEM_SOUNDTOUCH)
+
 dnl system libvpx Support
 dnl ========================================================
 MOZ_ARG_WITH_BOOL(system-libvpx,
--- icecat-60.5.0/toolkit/library/moz.build
+++ icecat-60.5.0/toolkit/library/moz.build
@@ -244,6 +244,21 @@
 if CONFIG['MOZ_SYSTEM_HUNSPELL']:
     OS_LIBS += CONFIG['MOZ_HUNSPELL_LIBS']
 
+if CONFIG['MOZ_SYSTEM_OGG']:
+    OS_LIBS += CONFIG['MOZ_OGG_LIBS']
+
+if CONFIG['MOZ_SYSTEM_THEORA']:
+    OS_LIBS += CONFIG['MOZ_THEORA_LIBS']
+
+if CONFIG['MOZ_SYSTEM_VORBIS']:
+    OS_LIBS += CONFIG['MOZ_VORBIS_LIBS']
+
+if CONFIG['MOZ_SYSTEM_TREMOR']:
+    OS_LIBS += CONFIG['MOZ_TREMOR_LIBS']
+
+if CONFIG['MOZ_SYSTEM_SOUNDTOUCH']:
+    OS_LIBS += CONFIG['MOZ_SOUNDTOUCH_LIBS']
+
 if CONFIG['MOZ_SYSTEM_LIBEVENT']:
     OS_LIBS += CONFIG['MOZ_LIBEVENT_LIBS']
 
--- icecat-60.5.0/xpcom/build/XPCOMInit.cpp
+++ icecat-60.5.0/xpcom/build/XPCOMInit.cpp
@@ -139,7 +139,9 @@
 
 #include "mozilla/ipc/GeckoChildProcessHost.h"
 
+#ifndef MOZ_OGG_NO_MEM_REPORTING
 #include "ogg/ogg.h"
+#endif
 #if defined(MOZ_VPX) && !defined(MOZ_VPX_NO_MEM_REPORTING)
 #if defined(HAVE_STDINT_H)
 // mozilla-config.h defines HAVE_STDINT_H, and then it's defined *again* in
@@ -635,10 +637,12 @@
   // this oddness.
   mozilla::SetICUMemoryFunctions();
 
+#ifndef MOZ_OGG_NO_MEM_REPORTING
   // Do the same for libogg.
   ogg_set_mem_functions(
       OggReporter::CountingMalloc, OggReporter::CountingCalloc,
       OggReporter::CountingRealloc, OggReporter::CountingFree);
+#endif
 
 #if defined(MOZ_VPX) && !defined(MOZ_VPX_NO_MEM_REPORTING)
   // And for VPX.