decodeStream()

bool fl::Jpeg::decodeStream ( const JpegConfig & config, fl::filebuf_ptr input_stream, Frame * frame, fl::u32 max_time_per_chunk_ms = 4, fl::function< bool(float)> progress_callback = {} )

static

Definition at line 443 of file jpeg.cpp.hpp.

                                               {
 
    if (!frame || !input_stream) {
        return false;
    }
 
    auto decoder = createDecoder(config);
 
    ProgressiveConfig prog_config;
    prog_config.max_time_per_tick_ms = max_time_per_chunk_ms;
    decoder->setProgressiveConfig(prog_config);
 
    if (!decoder->begin(input_stream)) {
        return false;
    }
 
    // Use callback-based decode with progress notifications
    fl::optional<fl::function<bool()>> yield_func;
    if (mProgresscallback) {
        yield_func = fl::function<bool()>([&]() {
            float progress = decoder->getProgress();
            return !mProgresscallback(progress); // Yield if callback returns false
        });
    }
    DecodeResult result = decoder->decode(yield_func);
 
    if (result == DecodeResult::Success) {
        Frame decoded = decoder->getCurrentFrame();
 
        if (frame->getWidth() != decoded.getWidth() || frame->getHeight() != decoded.getHeight()) {
            return false;
        }
 
        frame->copy(decoded);
        return true;
    }
 
    return false;
}

References fl::Frame::copy(), createDecoder(), fl::Frame::getHeight(), fl::Frame::getWidth(), fl::ProgressiveConfig::max_time_per_tick_ms, and fl::Success.

Here is the call graph for this function: