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Flush window events in MMAL and DRM renderers

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This commit is contained in:
Cameron Gutman 2024-06-09 14:26:26 -05:00
parent 486c46781b
commit ec7137e693
2 changed files with 34 additions and 0 deletions
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17
app/streaming/video/ffmpeg-renderers/drm.cpp
View File

@ -317,6 +317,23 @@ bool DrmRenderer::initialize(PDECODER_PARAMETERS params)
// CRTC modes below.
SDL_Renderer* renderer = SDL_CreateRenderer(params->window, -1, SDL_RENDERER_SOFTWARE);
if (renderer != nullptr) {
// SDL_CreateRenderer() can end up having to recreate our window (SDL_RecreateWindow())
// to ensure it's compatible with the renderer's OpenGL context. If that happens, we
// can get spurious SDL_WINDOWEVENT events that will cause us to (again) recreate our
// renderer. This can lead to an infinite to renderer recreation, so discard all
// SDL_WINDOWEVENT events after SDL_CreateRenderer().
Session* session = Session::get();
if (session != nullptr) {
// If we get here during a session, we need to synchronize with the event loop
// to ensure we don't drop any important events.
session->flushWindowEvents();
}
else {
// If we get here prior to the start of a session, just pump and flush ourselves.
SDL_PumpEvents();
SDL_FlushEvent(SDL_WINDOWEVENT);
}
SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);

17
app/streaming/video/ffmpeg-renderers/mmal.cpp
View File

@ -230,6 +230,23 @@ void MmalRenderer::setupBackground(PDECODER_PARAMETERS params)
return;
}
// SDL_CreateRenderer() can end up having to recreate our window (SDL_RecreateWindow())
// to ensure it's compatible with the renderer's OpenGL context. If that happens, we
// can get spurious SDL_WINDOWEVENT events that will cause us to (again) recreate our
// renderer. This can lead to an infinite to renderer recreation, so discard all
// SDL_WINDOWEVENT events after SDL_CreateRenderer().
Session* session = Session::get();
if (session != nullptr) {
// If we get here during a session, we need to synchronize with the event loop
// to ensure we don't drop any important events.
session->flushWindowEvents();
}
else {
// If we get here prior to the start of a session, just pump and flush ourselves.
SDL_PumpEvents();
SDL_FlushEvent(SDL_WINDOWEVENT);
}
SDL_SetRenderDrawColor(m_BackgroundRenderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
SDL_RenderClear(m_BackgroundRenderer);
SDL_RenderPresent(m_BackgroundRenderer);