Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/configure

 #!/bin/bash
 ##
 ##  configure
 ##
 ##  This script is the front-end to the build system. It provides a similar
 ##  interface to standard configure scripts with some extra bits for dealing
 ##  with toolchains that differ from the standard POSIX interface and
 ##  for extracting subsets of the source tree. In theory, reusable parts
 ##  of this script were intended to live in build/make/configure.sh,
 ##  but in practice, the line is pretty blurry.
@@ skipping 13 matching lines @@
   ${toggle_examples}              don't build examples
   --libc=PATH                     path to alternate libc
   --as={yasm|nasm|auto}           use specified assembler [auto, yasm preferred]
   ${toggle_fast_unaligned}        don't use unaligned accesses, even when
                                   supported by hardware [auto]
   ${toggle_codec_srcs}            in/exclude codec library source code
   ${toggle_debug_libs}            in/exclude debug version of libraries
   ${toggle_md5}                   support for output of checksum data
   ${toggle_static_msvcrt}         use static MSVCRT (VS builds only)
   ${toggle_vp8}                   VP8 codec support
-  ${toggle_psnr}                  output of PSNR data, if supported (encoders)
+  ${toggle_internal_stats}        output of encoder internal stats for debug, if supported (encoders)
   ${toggle_mem_tracker}           track memory usage
   ${toggle_postproc}              postprocessing
   ${toggle_multithread}           multithreaded encoding and decoding.
   ${toggle_spatial_resampling}    spatial sampling (scaling) support
   ${toggle_realtime_only}         enable this option while building for real-time encoding
+  ${toggle_error_concealment}     enable this option to get a decoder which is able to conceal losses
   ${toggle_runtime_cpu_detect}    runtime cpu detection
   ${toggle_shared}                shared library support
+  ${toggle_static}                static library support
   ${toggle_small}                 favor smaller size over speed
   ${toggle_postproc_visualizer}   macro block / block level visualizers
 
 Codecs:
   Codecs can be selectively enabled or disabled individually, or by family:
       --disable-<codec>
   is equivalent to:
       --disable-<codec>-encoder
       --disable-<codec>-decoder
 
@@ skipping 93 matching lines @@
     [ $doxy_minor -eq 5 ] && [ $doxy_patch -ge 3 ] && enable doxygen
 fi
 
 # install everything except the sources, by default. sources will have
 # to be enabled when doing dist builds, since that's no longer a common
 # case.
 enabled doxygen && php -v >/dev/null 2>&1 && enable install_docs
 enable install_bins
 enable install_libs
 
+enable static
 enable optimizations
 enable fast_unaligned #allow unaligned accesses, if supported by hw
 enable md5
 enable spatial_resampling
 enable multithread
 enable os_support
 
 [ -d ${source_path}/../include ] && enable alt_tree_layout
 for d in vp8; do
     [ -d ${source_path}/${d} ] && disable alt_tree_layout;
@@ skipping 39 matching lines @@
 
     altivec
 "
 HAVE_LIST="
     ${ARCH_EXT_LIST}
     vpx_ports
     stdint_h
     alt_tree_layout
     pthread_h
     sys_mman_h
+    unistd_h
 "
 CONFIG_LIST="
     external_build
     install_docs
     install_bins
     install_libs
     install_srcs
     debug
     gprof
     gcov
     rvct
     gcc
     msvs
     pic
     big_endian
 
     codec_srcs
     debug_libs
     fast_unaligned
     mem_manager
     mem_tracker
     mem_checks
     md5
 
     dequant_tokens
     dc_recon
     runtime_cpu_detect
     postproc
     multithread
-    psnr
+    internal_stats
     ${CODECS}
     ${CODEC_FAMILIES}
     encoders
     decoders
     static_msvcrt
     spatial_resampling
     realtime_only
+    error_concealment
     shared
+    static
     small
     postproc_visualizer
     os_support
 "
 CMDLINE_SELECT="
     extra_warnings
     werror
     install_docs
     install_bins
     install_libs
@@ skipping 12 matching lines @@
     as
     fast_unaligned
     codec_srcs
     debug_libs
     md5
 
     dequant_tokens
     dc_recon
     postproc
     multithread
-    psnr
+    internal_stats
     ${CODECS}
     ${CODEC_FAMILIES}
     static_msvcrt
     mem_tracker
     spatial_resampling
     realtime_only
+    error_concealment
     shared
+    static
     small
     postproc_visualizer
 "
 
 process_cmdline() {
     for opt do
         optval="${opt#*=}"
         case "$opt" in
         --disable-codecs) for c in ${CODECS}; do disable $c; done ;;
         *) process_common_cmdline "$opt"
@@ skipping 248 matching lines @@
 
 ##
 ## END APPLICATION SPECIFIC CONFIGURATION
 ##
 CONFIGURE_ARGS="$@"
 process "$@"
 cat <<EOF > ${BUILD_PFX}vpx_config.c
 static const char* const cfg = "$CONFIGURE_ARGS";
 const char *vpx_codec_build_config(void) {return cfg;}
 EOF