Google WebRTC

This is a clone of Google WebRTC repositiry of M121 release (01/23/24) for internal purposes.

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Content

The repository contains:

• The minimal set of headers used for WebRTC streaming purposes in Scope (include directory)
• Static libraries, built using MSVC 14.37.32822 (Visual Studio 2022) and Windows SDK 10.0.20348.0 (library directory)
• All the flags the static libraries were built with
• Tools and patches to rebuild the static libraries if needed

Build process

Debug

1. Get Depot Tools and unpack them (e.g. C:\depot_tools)

2. Run Command Prompt as admin

3. Add Depot Tools to your the environment PATH: set PATH=C:\depot_tools;%PATH%

4. Configure Depot Tools: cd C:\depot_tools gclient

5. Define other environment variables: set DEPOT_TOOLS_WIN_TOOLCHAIN=0 set GYP_MSVS_VERSION=2022

6. Create a new directory for WebRTC: cd C:\your_target_dir mkdir webrtc cd webrtc

7. Pull the latest sources of WebRTC (this can take about 30 min): fetch --nohooks webrtc

8. Check out the latest stable branch (M121 release of Januray, 23rd, 2024): cd src git checkout branch-heads/6167

9. Update Depot Tools to target the selected release (this can take about 20 min): cd .. gclient sync

10. Apply patches to make the sources buildable in VS 2022: "..\..\webrtc_builder\patches\patch.bat"

11. Run a command to generate Ninja build files and configs: gn gen --ide=vs2022 out/Debug --args="is_debug=true ffmpeg_branding=\"Chromium\" rtc_use_h264=true enable_iterator_debugging=true use_rtti=true is_clang=false rtc_build_tools=false rtc_include_tests=false rtc_build_examples=false windows_sdk_version=\"10.0.20348.0\""

12. Run Ninja to build all the Debug libraries: ninja -C out/Debug

13. When you face this link error: FAILED: obj/third_party/pffft/pffft/pffft.obj cl : Command line error D8021 : invalid numeric argument '/Wno-shadow' Run the following command ..\..\webrtc_builder\NinjaCheat\NinjaCheat out\Debug

Release

The same build steps from 1 to 10 of the Debug build are also applied for Release. Other steps are a bit different:

11. Run a command to generate Ninja build files and configs: gn gen --ide=vs2022 out/Release --args="is_debug=false ffmpeg_branding=\"Chromium\" rtc_use_h264=true enable_iterator_debugging=true use_rtti=true is_clang=false rtc_build_tools=false rtc_include_tests=false rtc_build_examples=false windows_sdk_version=\"10.0.20348.0\""

12. Run Ninja to build all the Release libraries: ninja -C out/Release

13. When you face this link error: FAILED: obj/third_party/pffft/pffft/pffft.obj cl : Command line error D8021 : invalid numeric argument '/Wno-shadow' Run the following command scope_dir\tools\webrtc\NinjaCheat\NinjaCheat out\Release

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Troubleshooting

Errors you can see during the build process and how to resolve them

• Here are the errors you could see if you haven't applied the VS 2022 patch (see step 10 above) or the patch hasn't been applied successfully

../../api/test/metrics/metrics_accumulator.cc(X): error C7555: use of designated initializers requires at least '/std:c++20'

D:\Code\webrtc-clang\src\api\test\metrics\metrics_logger.cc(57) : fatal error C1001: Internal compiler error.

../../modules/audio_device/win/audio_device_core_win.cc(X): error C2362: initialization of 'X' is skipped by 'goto Exit'

../../modules/audio_processing/aec3/matched_filter_avx2.cc(84): error C2676: binary '': '__m256' does not define this operator or a conversion to a type acceptable to the predefined operator

../../pc/legacy_stats_collector.cc(191): warning C4838: conversion from 'const double' to 'const ValueType &' requires a narrowing conversion

####../../third_party/ffmpeg/libavcodec/allcodecs.c(924): error C2039: 'init_static_data': is not a member of 'AVCodec'

..\src\third_party\ffmpeg\libavcodec\codec.h(187): note: see declaration of 'AVCodec'

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Further Help

These forum topics helped me along the way of building WebRTC for MSVC: https://groups.google.com/g/discuss-webrtc/c/PBJK6LMzNmU https://groups.google.com/g/discuss-webrtc/c/cMeYxhpB86k

Extended installation guide by Google: https://chromium.googlesource.com/chromium/src/+/master/docs/windows_build_instructions.md