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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.
Multimedia
OpenMAX AL Additions
QNX OpenMAX AL API
XAQNXVideoBufferQueueSourceItf
The XAQNXVideoBufferQueueSourceItf interface allows your applications to send Screen data to the QNX OpenMAX-compliant media engine for processing.
XAQNXVideoBufferQueueSourceItf
QNX video buffer queue interface for writing Screen data to a source
GetCallbackEventsMask()
Get a bitmask indicating which events are handled by the registered callback

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
  - Adding Multimedia to Target Images
  - Multimedia Renderer
  - Multimedia Streaming Server
  - Multimedia Test Utilities
  - OpenMAX AL Additions
    - QNX OpenMAX-Compliant Media Engine
      The Multimedia for QNX SDP includes a media engine that implements the Khronos Group's standard OpenMAX AL interface as well as some QNX additions. These additions let you extract, transcode, play, and record audio and video content in specific formats.
    - Decoding audio to a QNX buffer queue
      You can use the OpenMAX AL media engine to decode an audio stream to a QNX buffer queue. You can then read the data items from the buffer queue, further process them if desired, and send them to the output.
    - QNX OpenMAX AL API
      - Function safety
        Function safety refers to whether or not it's safe to use the QNX OpenMAX AL API functions in certain situations.
      - Buffer data types
        The QNX-extended API defines data structures to represent the buffers used for reading and writing media data as well as the data items within these buffers.
      - XAQNXBufferQueueSourceItf
        The XAQNXBufferQueueSourceItf interface allows your applications to send audio or video data to the QNX OpenMAX-compliant media engine for processing.
      - XAQNXVideoBufferQueueSourceItf
        The XAQNXVideoBufferQueueSourceItf interface allows your applications to send Screen data to the QNX OpenMAX-compliant media engine for processing.
        XAQNXVideoBufferQueueSourceItf constants
        Constants specifying IDs of XAQNXVideoBufferQueueSourceItf instances
        XAQNXVideoBufferQueueSourceItf
        QNX video buffer queue interface for writing Screen data to a source
        Clear()
        Clear the buffer information
        Enqueue()
        Add a video buffer to the queue
        GetCallbackEventsMask()
        Get a bitmask indicating which events are handled by the registered callback
        RegisterCallback()
        Register a callback for handling video buffer queue events
        SetBufferInfo()
        Set buffer information for the source
        SetCallbackEventsMask()
        Set a bitmask to specify which events are to be handled by the registered callback
        xaQNXVideoBufferQueueSourceCallback
        QNX video buffer queue event-handler prototype
      - XAQNXBufferQueueSinkItf
        The XAQNXBufferQueueSinkItf interface allows your applications to receive media data that were processed by the QNX OpenMAX-compliant media engine.
      - Logging function controls
        The logging function controls consist of a function prototype and a method for setting the logging function to use.
      - QNX configuration extensions
        The QNX OpenMAX API defines many parameters for configuring media processing and network settings in the underlying media engine.
- Networking Middleware
- Programming
- Sensor Framework
- 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.

GetCallbackEventsMask()

Get a bitmask indicating which events are handled by the registered callback

Synopsis:

#include <OMXAL/OpenMAXAL_QNX.h>

struct XAQNXVideoBufferQueueSourceItf_ {
    XAresult (*GetCallbackEventsMask)(XAQNXVideoBufferQueueSourceItf self,
                                      XAuint32 *pEventFlags);
} ;

Arguments:

self: A reference to the source interface
pEventFlags: A pointer to a 32-bit field for storing a bitmask indicating the handled events

Library:

mmfilter

Returns:

An XA_RESULT_* constant indicating the operation result

Page updated: March 12, 2026