GSY RTMP module build

中文

Background

Media3 media3-datasource-rtmp contains no native RTMP implementation. It uses AntMedia rtmp-client:3.2.0 at runtime. The previous JitPack v3.2.0.m2 workaround added only max-page-size=16384; its NDK r21e binary still used the legacy PT_GNU_RELRO layout.

Since 2026-08-19, the RTMP Java API and four native ABIs belong to the normal Android Library Module gsyVideoPlayer-rtmp. It follows the same version and publishing flow as every other GSY module:

• Maven Central: io.github.carguo:gsyvideoplayer-rtmp:${PROJ_VERSION}
• GitHub Packages: com.shuyu:gsyvideoplayer-rtmp:${PROJ_VERSION}
• Upstream: https://github.com/ant-media/LibRtmp-Client-for-Android.git
• Pinned revision: 3af67842f517f9c6bbd22b961878624d0c44b713
• NDK: 22.1.7171670 (r22b, matching local gsy-ijk)
• CMake: 3.22.1
• minSdk: 23
• ABIs: arm64-v8a, x86_64, armeabi-v7a, and x86

Android does not require NDK r28; r28 merely enables 16 KB alignment by default. This module deliberately keeps r22b and explicitly passes both max-page-size=16384 and common-page-size=16384. The former aligns PT_LOAD; the latter makes the legacy linker's PT_GNU_RELRO end land on a 16 KB boundary.

Per-library installation scans confirmed that the existing r22b-built gsy-ijk binaries already pass Android 17's 16 KB checks, so IJK is not rebuilt.

Rebuild the module

./third_party/rtmp-client/build-module.sh

The script pins the upstream revision and toolchain, applies the recorded native C correctness patch, rebuilds all four ABIs, updates the Java API, license and binaries under gsyVideoPlayer-rtmp/src/main, then builds and verifies the module's release AAR:

gsyVideoPlayer-rtmp/build/outputs/aar/gsyVideoPlayer-rtmp-release.aar

Verify

./third_party/rtmp-client/verify-aar.sh

All four ABIs must have PT_LOAD Align = 0x4000, a 16 KB-aligned GNU_RELRO end, BIND_NOW, stack canary instrumentation, and the NDK r22b identity. The AAR must also contain both Java API classes consumed by Media3.

Static checks do not replace protocol testing. Before a public release, run a real RTMP play, stop, and replay cycle on a 16 KB device.