open()

bool MayaFlux::IO::CameraReader::open

(

const CameraConfig &

config

)

Open a camera device using the supplied config.

Parameters

config

Device name, resolution hint, fps hint, format override.

Returns

True on success.

Definition at line 61 of file CameraReader.cpp.

{
    close();
 
    const std::string fmt_name = config.format_override.empty()
        ? std::string(CAMERA_FORMAT)
        : config.format_override;
 
    AVDictionary* opts = nullptr;
 
    std::string fps_str = std::to_string(static_cast<int>(config.target_fps));
    av_dict_set(&opts, "framerate", fps_str.c_str(), 0);
 
    std::string size_str = std::to_string(config.target_width)
        + "x"
        + std::to_string(config.target_height);
 
    av_dict_set(&opts, "video_size", size_str.c_str(), 0);
 
    if (!m_demux->open_device(config.device_name, fmt_name, &opts)) {
        m_last_error = "Device open failed: " + m_demux->last_error();
        MF_ERROR(Journal::Component::IO, Journal::Context::FileIO,
            "CameraReader::open — {}", m_last_error);
        return false;
    }
 
    if (!m_video->open_device(*m_demux,
            config.target_width,
            config.target_height)) {
        m_last_error = "Video stream open failed: " + m_video->last_error();
        MF_ERROR(Journal::Component::IO, Journal::Context::FileIO,
            "CameraReader::open — {}", m_last_error);
        m_demux->close();
        return false;
    }
 
    m_sws_buf.clear();
    m_scaler_ready = false;
 
    MF_INFO(Journal::Component::IO, Journal::Context::FileIO,
        "CameraReader: opened '{}' via {} — {}x{} @{:.1f}fps (scaler deferred)",
        config.device_name, fmt_name,
        m_video->width, m_video->height, m_video->frame_rate);
 
    return true;
}

References close(), MayaFlux::IO::CameraConfig::device_name, MayaFlux::Journal::FileIO, MayaFlux::IO::CameraConfig::format_override, MayaFlux::Journal::IO, m_demux, m_last_error, m_scaler_ready, m_sws_buf, m_video, MF_ERROR, MF_INFO, MayaFlux::IO::CameraConfig::target_fps, MayaFlux::IO::CameraConfig::target_height, and MayaFlux::IO::CameraConfig::target_width.

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