GstCUDA - libGstCUDA API
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This page shows the libGstCUDA API documentation provided in the GstCUDA framework.
Description
LibGstCUDA API consists in a library that expose special structures and functions that abstracts the complexity of: handle NVMM memory type buffers, extracts the data buffer to be processed and pass it to the GPU, and recover back the processed data from the GPU to the GStreamer element. The methods implemented in the libGstCUDA API ensures an optimal performance, due to direct handling of NVMM memory type buffers and zero memory copy interface between GStreamer and CUDA.
API Documentation
Structures
GstCudaBuffer
Code typedef struct _GstCudaBuffer GstCudaBuffer
An opaque structure representing a data buffer.
GstCudaMapper
Code typedef struct _GstCudaMapper GstCudaMapper
An opaque structure representing a mapper to convert GstBuffer to GstCudaBuffer.
GstCudaChannel
Code typedef struct _GstCudaChannel GstCudaChannel
The image size and data information for a single image plane. I.e.; for I420 a plane could be either Y, U or V.
Members
- data: A pointer to the plane data. This data can be directly consumed by CUDA.
- pitch: The width of the plane plus some HW dependent extra padding.
- width: The width of the plane.
- height: The height of the plane.
GstCudaData
Code typedef struct _GstCudaData GstCudaData
Data information as an array of channels. The meaning of each channel depends on the application's color space, i.e.: for I420 they will represent Y, U and V, respectively.
Members
- channels: An array of planes specified as GstCudaChannel.
Functions
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Code pipeline_create <name> <description>
Creates a new pipeline named after name using the description gst-launch syntax.
Parameters
- name: name of the pipeline to create.
- description: pipeline with gst-launch syntax.
Returns
- a new code: 0 "success" , 2 "Bad pipeline description", 9 "Cannot update this resource", 10 "Bad command"
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