Update CHANGELOG, shared object version for v3.6.0

Bug: aomedia:3342
Change-Id: Ie48bd6666a1800fc98281714c5d70f736361877b

CHANGELOG

diff --git a/CHANGELOG b/CHANGELOG
index 0df6a68..95f74c1 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,59 @@
+2023-01-12 v3.6.0
+  This release includes compression efficiency and perceptual quality
+  improvements, speedup and memory optimizations, and some new features.
+  This release is ABI compatible with the last release.
+
+  - New Features
+    * New values 20-27 (corresponding to levels 7.0-7.3 and 8.0-8.3) for
+      the encoder control AV1E_SET_TARGET_SEQ_LEVEL_IDX (note that the
+      proposal to add the new levels are still in draft status). The
+      original special value 24 (keep level stats only for level
+      monitoring) is renumbered as 32.
+    * New encoder control AV1E_SET_SKIP_POSTPROC_FILTERING to skip the
+      application of post-processing filters on reconstructed frame in
+      all intra mode.
+    * New encoder option "kf-max-pyr-height": Maximum height of pyramid
+      structure used for the GOP starting with a key frame (-1 to 5).
+    * Make SVC work for screen content.
+    * Rate control improvements to reduce frame-size spikes for screen
+      content coding.
+
+  - Compression Efficiency Improvements
+    * 0.7% - 2.2% RTC encoding BDrate gains for real time speed 8 to 10.
+    * 15% RTC encoding BDrate gains for screen content speed 10.
+
+  - Perceptual Quality Improvements
+    * Resolved a visual quality issue that was reported for high
+      resolution clips (2K) for speed 4 and above in VOD use case.
+    * Visual quality improvements to screen content coding.
+    * Quality improvements to temporal layer RTC coding.
+
+  - Speedup and Memory Optimizations
+    * RTC single-thread encoder speedup:
+      o ~6% instruction count reduction for speed 5 and 6.
+      o ~15% instruction count reduction for speed 7.
+      o ~10% instruction count reduction for speed 8 to 10 (>=360p
+        resolutions).
+    * RTC multi-thread encoder speedup (beyond single-thread speedup):
+      o 5-8% encode time reduction for speed 7 to 10.
+    * RTC screen-content encoder speedup:
+      o 11% instruction count reduction for speed 9 and 10 (>=720p
+        resolutions).
+    * ~5% reduction in heap memory requirements for RTC, speed 6 to 10.
+    * AVIF:
+      o Support multi-threading for deltaq-mode = 3, --allintra mode, 2x
+        faster than before.
+      o 4-5% speedup for speed 9 in still-picture encoding mode.
+      o 3-4% heap memory reduction in still-picture encoding mode for
+        360p-720p resolutions with multiple threads.
+
+  - Bug Fixes
+    * Added a workaround for an AV1 specification bug which makes
+      TRANSLATION type global motion models unusable.
+    * chromium:1393384 Avoid scene detection on spatial resize.
+    * aomedia:3308 Remove color artifacts under high motion.
+    * aomedia:3346 Make SVC work properly for screen content.
+
 2022-08-31 v3.5.0
   This release is ABI compatible with the last one, including speedup and memory
   optimizations, and new APIs and features.

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b55a63..8324401 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,9 +51,9 @@
 # passed to libtool.
 #
 # We set SO_FILE_VERSION = [c-a].a.r
-set(LT_CURRENT 8)
+set(LT_CURRENT 9)
 set(LT_REVISION 0)
-set(LT_AGE 5)
+set(LT_AGE 6)
 math(EXPR SO_VERSION "${LT_CURRENT} - ${LT_AGE}")
 set(SO_FILE_VERSION "${SO_VERSION}.${LT_AGE}.${LT_REVISION}")
 unset(LT_CURRENT)