Function: dvpp_jpeg_decode_async

C Prototype	*aclError acldvppJpegDecodeAsync(acldvppChannelDesc channelDesc, const void data, uint32_t size, acldvppPicDesc outputDesc, aclrtStream stream)**
Python Function	ret = acl.media.dvpp_jpeg_decode_async(dvpp_channel_desc, data, size, output_dvpp_pic_desc, stream)
Function Usage	Decodes a .jpg, .jpeg, .JPG, or .JPEG image. This API is asynchronous.
Input Description	dvpp_channel_desc: int, pointer address of the channel description. It must be the same as the dvpp_channel_desc argument passed to the acl.media.dvpp_create_channel call. data: int, pointer address of the memory address of the input image. size: int, actual size of the input image, in bytes. output_dvpp_pic_desc: int, pointer address of the output image information. Call acl.media.dvpp_create_pic_desc to create an image description. Call the acl.media.dvpp_set_pic_desc APIs to set the memory address, memory size, image format, width_stride, and height_stride of the output image. Call acl.media.dvpp_jpeg_predict_dec_size to predict the output buffer size in advance. Call acl.media.dvpp_jpeg_get_image_info/acl.media.dvpp_jpeg_get_image_info_v2 to obtain the width and height of the source JPEG image. For details about the output format and width and height alignment requirements, see Functions and Restrictions. When this argument is used as an output, the user can obtain the decoding output from the buffer address and call the acl.media.dvpp_get_pic_desc APIs to obtain the width and height of the output image. stream: int, stream object.
Return Value	ret: int, error code. 0 indicates the success of task delivery. Other values indicate the failure of task delivery.
Restrictions	This API is asynchronous. The API call delivers a task rather than executes a task. After this API is called, call the synchronization API (for example, acl.rt.synchronize_stream) to ensure that the task is complete.
Reference	For details about the API call sequence and example, see JPEGD.

Parent topic: JPEGD