libaom3

2023-09-01 v3.7.0
This release includes new codec interfaces, compression efficiency and
perceptual improvements, speedup and memory optimizations and many bug fixes.
This release is ABI compatible with the last release.

- New Features
* New codec controls:
* AV1E_SET_QUANTIZER_ONE_PASS: Set quantizer for each frame.
* AV1E_ENABLE_RATE_GUIDE_DELTAQ: enable the rate distribution guided delta
quantization in all intra mode. The "enable-rate-guide-deltaq" option is
added for this control.
* AV1E_SET_RATE_DISTRIBUTION_INFO: set the input file for rate
distribution used in all intra mode. The "rate-distribution-info" option
is added for this control.
* AV1E_GET_LUMA_CDEF_STRENGTH
* AV1E_SET_BITRATE_ONE_PASS_CBR
* AOM_SCALING_MODE is extended to include 2/3 and 1/3 scaling.
* aom_tune_metric is extended to include AOM_TUNE_VMAF_SALIENCY_MAP.
The "tune" option is extended to include "vmaf_saliency_map".
* SVC example encoder svc_encoder_rtc is able to use the rate control
library.
* Loopfilter level and CDEF filter level is supported by RTC rate control
library.
* New speed (--cpu-used) 11, intended for RTC screen sharing, added for
faster encoding with ~3% bdrate loss with 16% IC (instruction count)
speedup compared to speed 10.

- Compression Efficiency Improvements
* Improved VoD encoding performance
* 0.1-0.6% BDrate gains for encoding speeds 2 to 6
* Rate control accuracy improvement in VBR mode
* RTC encoding improvements
* Screen content mode: 10-19% BDrate gains for speeds 6 - 10
* Temporal layers video mode, for speed 10:
* 2 temporal layers on low resolutions: 13-15% BDrate gain
* 3 temporal layers on VGA/HD: 3-4% BDrate gain

- Perceptual Quality Improvements
* Fixed multiple block and color artifacts for RTC screen content by
* Incorporating color into RD cost for IDTX
* Reducing thresholds for palette mode in non RD mode
* Allowing more palette mode testing
* Improved color sensitivity for altref in non-RD mode.
* Reduced video flickering for temporal layer encoding.

- Speedup and Memory Optimizations
* Speed up the VoD encoder
* 2-5% for encoding speed 2 to 4
* 9-15% for encoding speed 5 to 6
* ARM
* Standard bitdepth
* speed 5: +31%
* speed 4: +2%
* speed 3: +9%
* speed 2: +157%
* High bitdepth
* speed 5: +85%
* RTC speedups
* Screen content mode
* 15% IC speedup for speeds 6-8
* ARM: 7% for speed 9, 3% for speed 10
* Temporal layers video mode
* 7% speedup for 3 temporal layers on VGA/HD, for speed 10
* Single layer video
* x86: 2% IC speedup for speeds 7-10
* ARM: 2-4% speedup across speeds 5-10

- Other improvements
* VoD: Major improvements to global motion estimation, now enabled up to
speed 4
* RTC
* Fixes to make lossless coding work.
* Fixes to make frame dropper (--drop_frames) work for single and temporal
layers.
* Improvements to RPS (reference picture selection) recovery frames.
* Improvements to rate control for temporal layers.
* libwebm is updated to libwebm-1.0.0.29-9-g1930e3c

- Bug Fixes
* aomedia:3261 Assertion failed when encoding av1 with film grain and
'--monochrome' flag
* aomedia:3276 ensure all allocations are checked (partial fix)
* aomedia:3451 The libaom library calls exit()
* aomedia:3450 enable -Wshadow for C++ sources
* aomedia:3449 Test Seg Faults After
b459af3e345be402db052a143fcc5383d4b74cbd
* aomedia:3416 prune unused symbols / restrict symbol visibility
* aomedia:3443 Jenkins failure:
UninstantiatedParameterizedTestSuite<EstimateNoiseTest>
* aomedia:3434 realtime failures with CONFIG_BITSTREAM_DEBUG=1
* aomedia:3433 DeltaqModeTest crash w/row_mt=0
* aomedia:3429 Encoder crash when turn on both ExternalResize and
g_threads > 2
* aomedia:3438 Build failure with
`-DSANITIZE=address -DBUILD_SHARED_LIBS=ON` when using clang.
* aomedia:3435 Block artifacts when scrolling with AV1 in screen sharing
scenarios
* aomedia:3170 vmaf tune presets produce extreme glitches in one scene
* aomedia:3401 Building shared libaom with MSVC results in a race condition
with the export library
* aomedia:3420 Floating point exception in av1_tpl_get_frame_importance()
* aomedia:3424 heap-buffer-overflow in ScaleFilterCols_16_C() (SIGABRT)
* aomedia:3417 examples/svc_encoder_rtc.c is using internal macros and
functions
* aomedia:3372 SEGV in assign_frame_buffer_p av1_common_int.h
* aomedia:3130 'cpu-features.h' file not found on Android NDK 22
* aomedia:3415 Encoder/decoder mismatch for svc_encoder_rtc running
1 SL 3 TL
* aomedia:3412 Lossless Mode Fails Loopback Bit Test
* aomedia:3409 The use of AV1_VAR_OFFS in av1/encoder/var_based_part.c is
incorrect for high bit depths
* aomedia:3403 test_libaom fails with error message
"feenableexcept() failed" on Linux arm
* aomedia:3370 Random color block at fast motion area
* aomedia:3393 Assertion failure in av1_convolve_2d_sr_c()
* aomedia:3392 Strong artifacting for high bit-depth real-time
* aomedia:3376 aomenc --threads=10 --deltaq-mode=3 crashes after
"Allintra: multi-threading of calculating differential contrast"
* aomedia:3380 Crashes and ASan and TSan errors in deltaq-mode=3
multithreading code
* chromium:1410766 heap-buffer-overflow in aom_yv12_copy_v_c
* Cannot set level via AV1E_SET_TARGET_SEQ_LEVEL_IDX
* Encoding failure due to the use of loop restoration with unintended use of
lossless mode.
* Signed integer overflow in scan_past_frames
* Signed integer overflow in update_a_sep_sym
* Flickering in AV1 1440p/2160p HDR transcodes
* Fixed artifacts with screen share at encoder speed 10
* Fixed prediction setup for IDTX

v3.0.0 fixes CVE-2020-36135 CVE-2020-36129 CVE-2020-36130 and CVE-2020-36131