decodeWithTimeout()

bool fl::Jpeg::decodeWithTimeout ( const JpegConfig & config, fl::span< const fl::u8 > data, Frame * frame, fl::u32 timeout_ms, float * progress_out = nullptr, fl::string * error_message = nullptr )

static

Definition at line 380 of file jpeg.cpp.hpp.

                             {
 
    if (!frame) {
        if (error_message) {
            *error_message = "Frame pointer is null";
        }
        return false;
    }
 
    auto decoder = createDecoder(config);
    auto stream = fl::make_shared<fl::memorybuf>(data.size());
    stream->write(data);
 
    if (!decoder->begin(stream)) {
        if (error_message) {
            decoder->hasError(error_message);
        }
        return false;
    }
 
    fl::u32 start_time = fl::millis();
    fl::u32 deadline = start_time + timeout_ms;
 
    // Use callback-based decode with time budget check
    DecodeResult result = decoder->decode(fl::function<bool()>([&]() {
        if (mProgressout) {
            *mProgressout = decoder->getProgress();
        }
        return fl::millis() >= deadline; // Yield if time budget exceeded
    }));
 
    if (result == DecodeResult::Success) {
        Frame decoded = decoder->getCurrentFrame();
 
        if (frame->getWidth() != decoded.getWidth() || frame->getHeight() != decoded.getHeight()) {
            if (error_message) {
                *error_message = "Target frame dimensions do not match decoded image dimensions";
            }
            return false;
        }
 
        frame->copy(decoded);
        return true;
    } else if (result == DecodeResult::Error || decoder->hasError()) {
        if (error_message) {
            decoder->hasError(error_message);
        }
        return false;
    }
 
    // Partial completion due to timeout
    if (mProgressout) {
        *mProgressout = decoder->getProgress();
    }
    return false; // Not complete yet
}

References fl::Frame::copy(), createDecoder(), fl::Error, fl::Frame::getHeight(), fl::Frame::getWidth(), fl::make_shared(), fl::millis(), fl::span< T, Extent >::size(), and fl::Success.

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