hi_mpi_pngd_get_image_data

Product	Supported
Atlas A3 training products / Atlas A3 inference products	√
Atlas A2 training products / Atlas A2 inference products	√
Atlas 200I/500 A2 inference products	√
Atlas inference products	√
Atlas training products	☓

Fetches the decoded image and input stream of a decoding channel.

hi_s32 hi_mpi_pngd_get_image_data (hi_pngd_chn chn, hi_pic_info *png_pic_info, hi_img_stream *stream, hi_s32 milli_sec)

Parameter	Input/Output	Description
chn	Input	Decoding channel ID. The value range of this parameter is [0, 128). The maximum number of channels is 128.
png_pic_info	Output	Pointer to the information of the decoded image. The decoded output is stored in the device buffer.
stream	Output	Pointer to the information of the decoded input stream.
milli_sec	Input	Timeout interval (ms). –1: blocking mode 0: non-blocking mode > 0: timeout interval (timeout mode). The timeout interval varies with the operating system. The deviation is generally within a time slice of an operating system. For example, if the time slice of an operating system is 4 ms and the value of milli_sec is set to 1, the actual timeout interval ranges from 1 ms to 5 ms. When the CPU load is high, the timeout interval may fluctuate.

0: success
Other values: failure. For details, see PNGD Return Codes. HI_ERR_PNGD_BUF_EMPTY indicates that there is no data. Other error codes indicate abnormal decoding.

The mode of fetching decoded images is set to blocking mode, non-blocking mode, or timeout mode by setting milli_sec when this API is called.
Ensure that a channel has been created. Otherwise, the error code HI_ERR_PNGD_UNEXIST is returned. If the channel is destroyed during image fetching, the error code HI_ERR_PNGD_UNEXIST is returned.
In non-blocking mode, if the buffer has no decoded images, the error code HI_ERR_PNGD_BUF_EMPTY is returned.
In timeout mode, if no decoded images are fetched within the specified timeout interval, the error code HI_ERR_PNGD_BUF_EMPTY is returned.
This API fetches the PNGD decode results from both the input and output buffers.
For details about the requirements for the input and output images during PNGD image decoding, see PNGD Functions and Restrictions.