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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
Sensor Framework
Sensor Framework Libraries
Camera Developer's Guide
The Camera library abstracts the complexity of interfacing with a camera connected to the target board.
Camera Library Reference
external_camera_api.h
Definitions and functions to use the External Camera library.
camera_vf_framerate_min_max_index_t
Indexes for the maximum and minimum frame rates

QNX Momentics IDE User's Guide
This User's Guide describes version 7.1 of the Integrated Development Environment (IDE) that's part of the QNX Momentics tool suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
- Quickstart Guide
- OS Components & Operations
- Audio & Graphics API
- Multimedia
- Networking Middleware
- Programming
- Sensor Framework
  - Architecture
  - Getting Started
    This guide gets you started with the Sensor Framework for QNX SDP.
  - Sensor Framework Libraries
    - ADAS Library Developer's Guide
      The ADAS library facilitates the development of embedded systems that rely on sensor data.
    - Camera Developer's Guide
      The Camera library abstracts the complexity of interfacing with a camera connected to the target board.
      - Camera Library Overview
        The Camera library provides applications with an interface to interact with cameras connected to your system. The library supports up to 64 cameras but the actual limit depends on your hardware platform's limitations and resources.
      - Viewfinder Window
        By default, the Camera library creates a viewfinder window.
      - Settings on the Camera
        You can configure various settings on the camera to modify the ISO, aperture, shutter speed, framerate, resolution, format, etc.
      - Image Buffer Access
        The Camera library supports read-only and read-write access to the image from different stages in the imaging datapath. Applications access image buffers by binding callback functions or events to a particular stage of the imaging datapath. Alternatively, applications can use streams from the Screen API to access buffers. In this guide, access to the imaging datapath is referred to as image buffers.
      - External Camera Drivers
        Cameras that aren't already supported by the Sensor Framework for QNX SDP can be supported by an external camera driver library.
      - Show a Video Stream from a Camera
        You can use the Camera library to show a video stream (image buffers) from a live camera or file camera. This section shows you the basic workflow for doing so.
      - Camera Library Reference
        camera_api.h
        The main definitions and functions for the Camera Library.
        camera_encoder.h
        Functions to configure parameters for video encoding.
        camera_h264avc.h
        Supported H.264/AVC video encoder parameters.
        camera_3a.h
        Enumerations and functions for configuring 3A algorithms (Auto Focus, Auto Exposure, Auto White Balance) for cameras.
        external_camera_api.h
        Definitions and functions to use the External Camera library.
        camera_buffer_list_t
        This structure is used to keep information about buffers, which will be used for preview
        camera_preview_frame_flags_t
        This structure represents the camera preview frame status
        camera_preview_params_t
        This structure represents the camera preview parameters
        camera_vf_framerate_min_max_index_t
        Indexes for the maximum and minimum frame rates
        camera_external_camera_t
        Functions that must be implemented by an external camera library
        close_external_camera_func_t
        Discontinue use of an external camera on the device
        deinit_camera_func_t
        Deinitialize the specified external camera
        init_camera_func_t
        Initialize the specified external camera
        get_framerate_func_t
        Get the preview frame rate
        get_preview_frame_func_t
        Retrieve the next available preview frame
        get_preview_num_buffers_func_t
        Determine the number of preview buffers that the camera requires
        get_supported_vf_framerates_func_t
        Retrieve the supported viewfinder frame rates
        get_supported_vf_frametypes_func_t
        Retrieve the supported viewfinder frame types
        get_supported_vf_resolutions_func_t
        Retrieve the list of supported viewfinder resolutions
        get_time_func_t
        Return the current camera time
        open_external_camera_func_t
        Request a handle to access an external camera
        parse_config_func_t
        Parse a camera-specific attribute from the configuration file
        set_framerate_func_t
        Adjust the preview frame rate
        start_preview_func_t
        Start preview (the viewfinder) with the desired configuration
        stop_preview_func_t
        Stop a running preview (viewfinder)
    - Sensor Developer's Guide
      The Sensor library abstracts the complexity of interfacing with sensors and cameras connected to the target board.
  - Sensor Framework Services
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX Neutrino RTOS system and developers who want to create a QNX Neutrino resource manager free from vulnerabilities.
- Utilities & Libraries
QNX Hypervisor
The QNX Hypervisor allows you to run multiple OSs on a target system so you can separate critical and non-critical functions, support a wide variety of applications, and reduce hardware costs.
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX software in Amazon Web Services (AWS) and Microsoft Azure (Azure).
QNX Advanced Virtualization Frameworks User's Guide
This User's Guide is aimed at all systems integrators and developers who want to design and build embedded systems using the QNX Advanced Virtualization Frameworks.
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

camera_vf_framerate_min_max_index_t

Indexes for the maximum and minimum frame rates

Synopsis:

#include <camera/external_camera_api.h>

typedef enum {
    CAMERA_VF_FRAMERATE_MAX_INDEX = 0,
    CAMERA_VF_FRAMERATE_MIN_INDEX
} camera_vf_framerate_min_max_index_t;

Data:

CAMERA_VF_FRAMERATE_MAX_INDEX: The array index of the maximum frame rate.
CAMERA_VF_FRAMERATE_MIN_INDEX: The array index of the minimum frame rate.

Library:

libcamapi

Description:

This enum is used as the array indexes for the maximum and minimum frame rates for the get_supported_vf_frame_rates() function when isMaxMin is set to true.

Page updated: March 12, 2026