Restructure ohos/ into proper OHOS Flutter HAR plugin layout with NAPI native support

[Copilot]

Replaces the incorrect ohos/ files (which used the Linux/desktop Flutter EGL plugin API) with the correct OHOS Flutter HAR plugin layout.

New OHOS module structure

• build-profile.json5 — module build config with externalNativeOptions pointing at the C++ CMakeLists, targeting arm64-v8a
• hvigorfile.ts — Hvigor build script using import { harTasks } + export default { system: harTasks, plugins: [] } pattern
• index.ets — re-exports FvpPlugin
• oh-package.json5 — package descriptor with @ohos/flutter_ohos HAR dependency
• src/main/module.json5 — HAR module descriptor (type: har)
• local.properties — machine-local SDK path template (added to .gitignore)

ArkTS plugin (src/main/ets/components/plugin/FvpPlugin.ets)

Mirrors Android's FvpPlugin.java in ArkTS: implements FlutterPlugin + MethodCallHandler on channel "fvp", handling CreateRT / ReleaseRT / MixWithOthers. CreateRT registers an OHOS SurfaceTextureEntry, retrieves its surfaceId, sets the buffer size, then calls the native NAPI module:

const texId = textureRegistry.getTextureId();
const entry = textureRegistry.registerTexture(texId);
const surfaceId = entry.getSurfaceId();
textureRegistry.setTextureBufferSize(texId, width, height);
fvpNative.nativeSetSurface(handle, texId, surfaceId, width, height);

Native NAPI module (src/main/cpp/)

• Registers the module via NAPI_MODULE(fvp_plugin, Init) macro
• Exports nativeSetSurface — uses OH_NativeWindow_CreateNativeWindowFromSurfaceId() to bridge Flutter's surface ID to mdk's updateNativeSurface()
• Exports MdkGetPlayerVid (returns OHNativeWindow*) and MdkIsEmulator for Dart FFI, marked with FVP_EXPORT (__attribute__((visibility("default")))) to ensure visibility despite hidden-by-default symbol preset
• Compiles callbacks.cpp into the same .so
• Links libace_napi.z.so, libace_ndk.z.so, libnative_window.so; pulls mdk via the existing cmake/deps.cmake
• C++20, CMake 3.17

CMake / deps

• cmake/deps.cmake: downloads mdk-sdk-ohos.7z for the OHOS target (via CMAKE_SYSTEM_NAME MATCHES "OHOS")

Dart

• lib/src/video_player_mdk.dart: preferred OHOS video decoder set to "OH" (hardware decoder) instead of "AMediaCodec"

[wang-bin]

@copilot there is a working ohos app example using libmdk: https://github.com/wang-bin/mdk-examples/tree/master/ohos , please review current code by referring to the code in that link

[Copilot]

@copilot there is a working ohos app example using libmdk: https://github.com/wang-bin/mdk-examples/tree/master/ohos , please review current code by referring to the code in that link

Reviewed against https://github.com/wang-bin/mdk-examples/tree/master/ohos and applied the following corrections (commit a0e8022):

fvp_plugin.cpp:

• Replaced NAPI_MODULE macro (Node.js) with explicit static napi_module + napi_module_register + __attribute__((constructor)), matching the mdk-examples pattern
• Added #include <hilog/log.h> and redirected MDK log output to OHOS HiLog via OH_LOG_Print (same approach as player_napi.cpp)
• Replaced clog with FVP_LOG/FVP_ERR HiLog macros

src/main/cpp/CMakeLists.txt:

• Downgraded cmake_minimum_required to 3.4.1 and C++ standard to 17 (matching mdk-examples)
• Fixed wrong library name libnative_window.so → libnativewindow.so
• Added missing libace_ndk.z.so and libhilog_ndk.z.so
• Removed the Android-only FLUTTER_PLUGIN_IMPL compile definition

build-profile.json5:

• Added abiFilters: ["arm64-v8a", "x86_64"] and named target "fvp_plugin" in externalNativeOptions

[wang-bin]

@copilot only arm64-v8a is available. keep c++20. no cmake version change. no need to change log. copyright year is 2026

[Copilot]

@copilot only arm64-v8a is available. keep c++20. no cmake version change. no need to change log. copyright year is 2026

Done in commit af06abd:

• abiFilters is now ["arm64-v8a"] only
• Reverted to C++20 and cmake_minimum_required(VERSION 3.10)
• Removed the mdk::setLogHandler / HiLog changes; log output stays as clog
• Copyright year updated to 2026

[wang-bin]

keep using NAPI_MODULE macro

[wang-bin]

@copilot preferred video decoder for ohos is "OH" not "AMediaCodec". symbols in fvp_plugin.h must be visible

[Copilot]

keep using NAPI_MODULE macro

Done in commit 573aa9a — replaced the manual static napi_module + napi_module_register + __attribute__((constructor)) with NAPI_MODULE(fvp_plugin, Init).

@copilot preferred video decoder for ohos is "OH" not "AMediaCodec". symbols in fvp_plugin.h must be visible

Done in commit 573aa9a:

• video_player_mdk.dart: changed OHOS decoder list to ['OH', 'FFmpeg', 'dav1d']
• fvp_plugin.h: added FVP_EXPORT macro (__attribute__((visibility("default"))) on non-Windows) to MdkIsEmulator and MdkGetPlayerVid

[wang-bin]

@copilot libnative_window not libnativewindow. cmake min version 3.17. change modified files copyright year, ends with 2026. export { harTasks } is wrong. download mdk-sdk-ohos.7z

[Copilot]

@copilot libnative_window not libnativewindow. cmake min version 3.17. change modified files copyright year, ends with 2026. export { harTasks } is wrong. download mdk-sdk-ohos.7z

Done in commit 4f2242c:

• libnative_window.so (corrected from libnativewindow.so)
• cmake_minimum_required(VERSION 3.17)
• hvigorfile.ts: now uses import { harTasks } from '@ohos/hvigor-ohos-plugin' + export default { system: harTasks, plugins: [] }
• cmake/deps.cmake: mdk-sdk-ohos.7z (was mdk-sdk-ohos.tar.xz)
• Copyright years updated to 2026 in FvpPlugin.ets and lib/src/lib.dart