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Automatically use virtual display if no active display is detected

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This commit is contained in:
Yukino Song
2025-05-12 21:31:14 +08:00
parent e231803ec2
commit 8aff38cf7c
3 changed files with 38 additions and 29 deletions
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54
src/video.cpp
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@@ -41,36 +41,34 @@ using namespace std::literals;
namespace video {
namespace {
/**
* @brief Check if we can allow probing for the encoders.
* @return True if there should be no issues with the probing, false if we should prevent it.
*/
bool allow_encoder_probing() {
const auto devices {display_device::enumerate_devices()};
/**
* @brief Check if we can allow probing for the encoders.
* @return True if there should be no issues with the probing, false if we should prevent it.
*/
bool allow_encoder_probing() {
const auto devices {display_device::enumerate_devices()};
// If there are no devices, then either the API is not working correctly or OS does not support the lib.
// Either way we should not block the probing in this case as we can't tell what's wrong.
if (devices.empty()) {
return true;
}
// Since Windows 11 24H2, it is possible that there will be no active devices present
// for some reason (probably a bug). Trying to probe encoders in such a state locks/breaks the DXGI
// and also the display device for Windows. So we must have at least 1 active device.
const bool at_least_one_device_is_active = std::any_of(std::begin(devices), std::end(devices), [](const auto &device) {
// If device has additional info, it is active.
return static_cast<bool>(device.m_info);
});
if (at_least_one_device_is_active) {
return true;
}
BOOST_LOG(error) << "No display devices are active at the moment! Cannot probe the encoders.";
return false;
// If there are no devices, then either the API is not working correctly or OS does not support the lib.
// Either way we should not block the probing in this case as we can't tell what's wrong.
if (devices.empty()) {
return true;
}
} // namespace
// Since Windows 11 24H2, it is possible that there will be no active devices present
// for some reason (probably a bug). Trying to probe encoders in such a state locks/breaks the DXGI
// and also the display device for Windows. So we must have at least 1 active device.
const bool at_least_one_device_is_active = std::any_of(std::begin(devices), std::end(devices), [](const auto &device) {
// If device has additional info, it is active.
return static_cast<bool>(device.m_info);
});
if (at_least_one_device_is_active) {
return true;
}
BOOST_LOG(error) << "No display devices are active at the moment! Cannot probe the encoders.";
return false;
}
void free_ctx(AVCodecContext *ctx) {
avcodec_free_context(&ctx);