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This page records the main changes in each version of the SMeeting Windows SDK. You can get the current SDK version with SMeetingEngine_Version.

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1.0.0-alpha.7 - 2026-09-29

Added
  • The SMeeting_C C interface is now officially available: SMeeting_C.cpp / SMeetingEngineGlobal.cpp are compiled into SMeeting.vcxproj again, and SMeeting.dll now actually exports the SMeetingEngine_* family of C functions (the number of x86 exported symbols goes from 3 to 139). Before this, the wrapper was excluded from the project, and the DLL in the package didn’t contain these symbols.
Changed
  • The internal implementation of SMeeting_C is ported to the interfaces after the engine-level / meeting-level split and no longer follows the single-meeting approach from before the split, consistent with the ISMeetingEngine / ISMeetingChannel structure introduced in 1.0.0-alpha.5
API changes
  • C++: none. SMeeting.h / SMeeting_def.h have no signature changes, the vtables of ISMeetingEngine / ISMeetingChannel are unchanged, and there is no ABI break.
  • C: no changes to the function declarations in SMeeting_C.h (only the comment at the top of the file was updated). However, because the C wrapper is only now actually compiled into the DLL, SMeeting.lib gains C export symbols, and projects that use the C interface need to relink.
  • Package contents are unchanged: meeting_dll/include/ still contains only SMeeting.h / SMeeting_def.h; SMeeting_C.h is not in the package, so you still need to request the header separately to use the C interface.

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1.0.0-alpha.6 - 2026-09-24

Added
  • Added an x64 (64-bit) package; Windows delivery is now two packages, x86 + x64:
    • meeting-win-sdk-2.0.zip (x86, 32-bit)—the package name is exactly the same as before
    • meeting-win-sdk-x64-2.0.zip (x64, 64-bit)—new; the package name has an extra -x64 segment before the version number
    Both packages have the same internal structure (the root directory is meeting_dll/ in both), but SMeeting.dll / SMeeting.lib have different bitness, so don’t mix them or unzip them into the same directory; pick the package that matches your project’s target platform. For the download links, see Integration.
  • Dependency libraries are split by architecture into two sets, lib/<library>/lib/win32 and lib/<library>/lib/win64
Changed
  • Fixed the x64 project configuration: the output type changed from Application to DynamicLibrary, x64 now has its own include and library directories (pointing to lib/*/lib/win64), and output goes to Release_x64
  • Upgraded the underlying curl: libcurl uses new header files and import libraries, and a zlib dependency (zlib1.dll) is added
  • The jsoncpp import library is renamed from jsoncpp_static.lib to jsoncpp.lib and split into win32 / win64 directories
  • Removed the unused pthread dependency; the underlying audio and video library is refreshed accordingly, and bin no longer contains DenModule.dll, rtp.dll, or zlib.dll, using zlib1.dll instead
  • Source and header file encoding is unified to UTF-8 with BOM, and a new .editorconfig enforces it, which fixes the C4819 warnings and potential garbled Chinese comments in SMeeting_def.h and other files under GBK environments
Fixed
  • Fixed 4 jsoncpp array loops: the index type changed from size_t to Json::Value::ArrayIndex, avoiding type mismatches in 64-bit builds
API changes None. SMeeting.h / SMeeting_def.h / SMeeting_C.h only changed encoding in this release, with no signature changes; the vtables are unchanged, and there is no ABI break. Following the general convention in the Quickstart, we still recommend recompiling your project after upgrading the SDK.

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1.0.0-alpha.5 - 2026-08-21

Added
  • Added the ISMeetingChannel meeting object; each meeting corresponds to one channel object.
  • Added the ISMeetingChannelEvent meeting-level event callbacks.
  • Added the ISMeetingChannelSetting meeting-level settings object.
  • Internally added SRTCChannelControl to wrap each SRTC::IRTCChannel and its media objects.
Changed
  • ISMeetingEngine is reduced to engine-level APIs: login, meeting management HTTP APIs, device enumeration, IM, the resource drive, and the channel object lifecycle.
  • Entering a meeting now takes two steps: createChannel / createChannelByMeetingId only create the object, and ISMeetingChannel::enter() actually enters the meeting.
  • ISMeetingSetting keeps only sdk_log_path / enable_stream_log; the other settings moved to ISMeetingChannelSetting.
  • When automatically re-entering from the waiting room, channelId stays the same, and leaveChannel still releases the object by the original key.
Fixed
  • adminDestroyRoom now correctly calls leaveChannel to leave the underlying SRTC channel.
  • Calling device enumeration before login now lazily initializes the underlying SRTC engine on demand.
API changes (breaking; you must recompile)
  • Removed ISMeetingEngine::enterRoom, enterRoomByMeetingId, and exitRoom; use createChannel + ISMeetingChannel::enter() + leaveChannel instead.
  • Removed ISMeetingEngine::exitWaitRoom(roomno, meeting_id, back); use ISMeetingChannel::exitWaitRoom(back) instead.
  • The following methods moved from ISMeetingEngine to ISMeetingChannel: admin*, updateName, chat / raise hand, getMe / getRoom / getMembers / getMember / getOpt, getLocalMic / getLocalCamera / getLocalScreen / getRemoteVideo / getRemoteAudio / getMcuVideo, getCustomVideo / getCustomAudio / setCustomRecvBack, the sub-meeting *SubMeeting methods, mcu*, sign-in signin*, and getLocalRecord.
  • getLocalRecord(mid, &rec) changed to getLocalRecord(&rec); mid uses the channel object’s own meeting ID.
  • All meeting-level callbacks drop the roomno first parameter; the first parameter of onAdminConfirmHandup changed to uid.
  • onDeviceStatusChange / onShareTargetNotFind moved from the engine callbacks to ISMeetingChannelEvent.
  • Pure virtual interface signature changes alter the vtable, so your app crashes if you replace only the DLL without recompiling your project.