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Harish Mahendrakar 816221d81e libhevcdec: Reset PPS scratch buffer and extension flags before parsing 
When parsing PPS in ihevcd_parse_pps(), the scratch buffer
ps_codec->s_parse.ps_pps_base + MAX_PPS_CNT - 1 was not reset to zero,
unlike ihevcd_parse_sps(). In streams with concatenated sequences where
an earlier sequence set pps_extension_present_flag and range extension
flags, subsequent sequences without PPS extensions would retain the stale
flags. This caused the parser to attempt reading non-existent range
extension syntax, leading to bitstream parsing failure.

- In ihevcd_parse_pps(), reset the scratch PPS structure to zero upon
  entry while preserving pi2_scaling_mat and ps_tile pointers.
- In both ihevcd_parse_pps() and ihevcd_parse_sps(), explicitly zero all
  extension flags when pps_extension_present_flag / sps_extension_present_flag
  is 0.

Test: ./hevc_dec_tests
TAG=agy
CONV=476d1054-10ff-4f19-88d5-a1c8dae7b57f

(cherry picked from commit 4bf5819c62)
2026-09-17 12:25:17 -07:00
.github/workflows cmake.yml: Add runners to build arm and aarch63 builds 2026-02-22 20:55:28 -08:00
.vscode Rename test folder as examples 2026-04-13 12:02:22 +05:30
cmake Add initial tests for decoder and encoder 2026-07-27 13:15:45 -07:00
common [decoder] Add bit_depth to iv_yuv_buf_t and ivd_video_decode_op_t 2026-09-16 15:45:58 -07:00
decoder libhevcdec: Reset PPS scratch buffer and extension flags before parsing 2026-09-17 12:25:17 -07:00
encoder Pass remaining bytes when reinitializing bitstream structure after tile or slice 2026-06-22 10:53:19 +05:30
examples Updated tests, fuzzer and examples to enable HBD testing. 2026-09-16 15:45:58 -07:00
fuzzer Updated tests, fuzzer and examples to enable HBD testing. 2026-09-16 15:45:58 -07:00
tests Updated tests, fuzzer and examples to enable HBD testing. 2026-09-16 15:45:58 -07:00
Android.bp refactor: clean up SAO and ILF padding code 2026-05-24 10:11:19 -07:00
CMakeLists.txt [cmake] Add ENABLE_TESTS option and disable tests in ossfuzz.sh 2026-09-13 11:49:56 -07:00
FrameInfo.md Decoder: add support for QP and block_type map export in library 2022-08-04 11:40:43 +05:30
libhevc_blocklist.txt Remove assembly functions from CFI blocklist 2021-01-21 16:26:15 -08:00
LICENSE Add LICENSE to fix lint warning 2023-01-25 17:14:53 -08:00
METADATA Add METADATA to libhevc: Apache2=NOTICE 2020-04-28 08:53:23 -07:00
MODULE_LICENSE_APACHE2 Initial Version of HEVC decoder 2014-05-21 18:14:55 -07:00
NOTICE Initial Version of HEVC decoder 2014-05-21 18:14:55 -07:00
OWNERS OWNERS: Include avic_OWNERS 2023-08-11 15:54:49 -07:00
PREUPLOAD.cfg point to new repo hooks for mainline uploads 2020-05-26 15:17:47 -07:00
README.md libhevc: Enable support for MacOS 2024-10-01 06:37:42 -07:00

README.md

LIBHEVC

Getting Started Document

LibHEVC build steps

Supports:

  • aarch32/aarch64 on Linux.
  • aarch32/aarch64 on Android.
  • x86_32/x86_64 on Linux.
  • aarch64 on Mac.
  • x86_64 on Mac.

Native Builds

Use the following commands for building on the target machine

$ cd external/libhevc
$ mkdir build
$ cd build
$ cmake ..
$ make

Cross-compiler based builds

Building for x86_32 on a x86_64 Linux machine

$ cd external/libhevc
$ mkdir build
$ cd build
$ CFLAGS="-m32" CXXFLAGS="-m32" LDFLAGS="-m32" cmake ..
$ make

Building for aarch32/aarch64

Update 'CMAKE_C_COMPILER', 'CMAKE_CXX_COMPILER', 'CMAKE_C_COMPILER_AR', and 'CMAKE_CXX_COMPILER_AR' in CMAKE_TOOLCHAIN_FILE passed below

$ cd external/libhevc
$ mkdir build
$ cd build

For aarch64

$ cmake .. -DCMAKE_TOOLCHAIN_FILE=../cmake/toolchains/aarch64_toolchain.cmake
$ make

For aarch32

$ cmake .. -DCMAKE_TOOLCHAIN_FILE=../cmake/toolchains/aarch32_toolchain.cmake
$ make

Building for android

NOTE: This assumes that you are building on a machine that has Android NDK.

$ cd external/libhevc
$ mkdir build
$ cd build

Armv7 (32-bit)

cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/toolchains/android_toolchain.cmake\
    -DHEVC_ANDROID_NDK_PATH=/opt/android-ndk-r26d/\
    -DANDROID_ABI=armeabi-v7a\
    -DANDROID_PLATFORM=android-23 ../
make

Armv8 (64-bit)

cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/toolchains/android_toolchain.cmake\
    -DHEVC_ANDROID_NDK_PATH=/opt/android-ndk-r26d/\
    -DANDROID_ABI=arm64-v8a\
    -DANDROID_PLATFORM=android-23 ../
make