Function: dvpp_create_channel

aclError acldvppCreateChannel(acldvppChannelDesc *channelDesc)

ret = acl.media.dvpp_create_channel(dvpp_channel_desc)

Creates an image processing channel, which is reusable. After being destroyed, the channel is no longer available.

dvpp_channel_desc: int, pointer address of the channel description. The input data is created by calling acl.media.dvpp_create_channel_desc.

ret: int, error code.

• 0 indicates success.
• Other values indicate failure.

• Channels are thread-unsafe, that is, a separate channel should be created for each thread.
• A channel cannot be used concurrently across streams at the same time.
• acl.media.dvpp_create_channel creates a stream internally by calling acl.rt.create_stream once. The stream is used for a channel creation task, and is automatically destroyed when the task is complete.

  When creating a channel, observe the restrictions of acl.rt.create_stream, such as the number of streams.

For details about the API call sequence and example, see Media Data Processing V1.