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aclvdecChannelDescParamType

Data Format

Description

ACL_VDEC_CSC_MATRIX_UINT32 = 0

CSC matrix attribute. For details about the attribute values, see acldvppCscMatrix.

The Atlas 200/300/500 Inference Product does not support this mode.

The Atlas Training Series Product does not support this mode.

ACL_VDEC_OUT_MODE_UINT32 = 1

Frame output mode, to set whether to output frames in real time.

The options are as follows:

  • 0: delayed frame output mode. The VDEC starts to output the decoding result only after receiving multiple frames in the stream.

  • 1: real-time frame output mode. The VDEC starts to output the decoding result in real time after obtaining a frame in the stream. Only H.264/H.265 standard streams with simple reference relationships are supported (no long-term reference frames or B-frames).

ACL_VDEC_THREAD_ID_UINT64 = 2

Callback thread ID.

NOTE:

It is not allowed to pass the same thread ID for subscribing to VDEC callback functions on different devices in the same process.

On a single device, the same thread ID can be specified for multiple VDEC channels. Compared with the scenario where each VDEC channel is processed by a separate thread, VDEC is less performant when multiple VDEC channels are processed in serial in a single thread.

ACL_VDEC_CALLBACK_PTR = 3

Decoding callback function. The format is as follows:

def vdec_call_back_func(dvpp_stream_desc, dvpp_pic_desc, user_data):
pass

ACL_VDEC_CHANNEL_ID_UINT32 = 4

Channel ID.

Atlas 200/300/500 Inference Product: Must be in the range of [0, 31].

Atlas Training Series Product: Must be in the range of [0, 31].

ACL_VDEC_ENCODE_TYPE_UINT32 = 5

Video coding protocol.

For details, see acldvppStreamFormat.

ACL_VDEC_OUT_PIC_FORMAT_UINT32 = 6

YUV image storage format. For details, see Table 1.

If the output format is not specified, YUV420SP NV12 is used by default.

ACL_VDEC_OUT_PIC_WIDTH_UINT32 = 7

Maximum output width.

Atlas 200/300/500 Inference Product: Defaults to 1920.

Atlas Training Series Product: Defaults to 1920.

ACL_VDEC_OUT_PIC_HEIGHT_UINT32 = 8

Maximum output height.

Atlas 200/300/500 Inference Product: Defaults to 1120.

Atlas Training Series Product: Defaults to 1120.

ACL_VDEC_REF_FRAME_NUM_UINT32 = 9

Number of reference frames. Must be in the range of [0, 16].

Atlas 200/300/500 Inference Product: Not configurable in the current version.

Atlas Training Series Product: Not configurable in the current version.

ACL_VDEC_BIT_DEPTH_UINT32 = 10

Video bit depth.

The values are as follows:
  • 0: 8-bit
  • 1: 10-bit (default)

Atlas 200/300/500 Inference Product: Not configurable in the current version.

Atlas Training Series Product: Not configurable in the current version.