aclvdecChannelDescParamType

enum aclvdecChannelDescParamType {
    ACL_VDEC_CSC_MATRIX_UINT32 = 0,      // CSC matrix attribute. Its value is of the uint32_t type.
    ACL_VDEC_OUT_MODE_UINT32,            // Real-time frame output or not. Its value is of the uint32_t type.
    ACL_VDEC_THREAD_ID_UINT64,           // Callback thread ID. Its value is of the uint64_t type.
    ACL_VDEC_CALLBACK_PTR,               // Callback function. Its value is a memory pointer.
    ACL_VDEC_CHANNEL_ID_UINT32,          // Channel ID. Its value is of the uint32_t type.
    ACL_VDEC_ENCODE_TYPE_UINT32,         // Video coding protocol. Its value is of the uint32_t type.
    ACL_VDEC_OUT_PIC_FORMAT_UINT32,      // Output image format. Its value is of the uint32_t type.
    ACL_VDEC_OUT_PIC_WIDTH_UINT32,       // Maximum width of the decoding stream. Its value is of the uint32_t type.
    ACL_VDEC_OUT_PIC_HEIGHT_UINT32,      // Maximum height of the decoding stream. Its value is of the uint32_t type.
    ACL_VDEC_REF_FRAME_NUM_UINT32,       // Number of reference frames. Its value is of the uint32_t type.
    ACL_VDEC_BIT_DEPTH_UINT32            // Video bit width. Its value is of the uint32_t type.
}

**Table 1** Attribute settings
Attribute	Description
ACL_VDEC_CSC_MATRIX_UINT32	CSC matrix attribute. For details about the attribute values, see acldvppCscMatrix. The Atlas 200/300/500 Inference Product does not support this option. The Atlas Training Series Product does not support this option.
ACL_VDEC_OUT_MODE_UINT32	Frame output mode. Value range: 0: delayed frame output mode. VDEC starts to output the decoding result only after receiving multiple frames in the stream. 1: real-time frame output mode. VDEC starts to output the decoding result in real time after receiving one 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	Callback thread ID. NOTE: Do not 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	Decoding callback function. For details, see aclvdecCallback.
ACL_VDEC_CHANNEL_ID_UINT32	Channel ID. Must be in the range of [0, 31] for the Atlas 200/300/500 Inference Product. Must be in the range of [0, 31] for the Atlas Training Series Product.
ACL_VDEC_ENCODE_TYPE_UINT32	Video coding protocol: H.265 main level (0), H.264 baseline level (1), H.264 main level (2), or H.264 high level (3). For details, see acldvppStreamFormat.
ACL_VDEC_OUT_PIC_FORMAT_UINT32	Storage format of the output image. For details about the supported formats, see Restrictions on Stream/Image Formats, Width and Height Alignment, and Buffers. Defaults to YUV420SP NV12.
ACL_VDEC_OUT_PIC_WIDTH_UINT32	Maximum output width. Defaults to 1920 for the Atlas 200/300/500 Inference Product. Defaults to 1920 for the Ascend 310 AI Processor.
ACL_VDEC_OUT_PIC_HEIGHT_UINT32	Maximum output height Defaults to 1120 for the Atlas 200/300/500 Inference Product. Defaults to 1120 for the Ascend 310 AI Processor.
ACL_VDEC_REF_FRAME_NUM_UINT32	Number of reference frames. Must be in the range of [0, 16]. Not configurable for the Atlas 200/300/500 Inference Product in the current version. Not configurable for the Atlas Training Series Product in the current version.
ACL_VDEC_BIT_DEPTH_UINT32	Video bit depth. Value range: 0: 8-bit 1: 10-bit (default) Not configurable for the Atlas 200/300/500 Inference Product in the current version. Not configurable for the Atlas Training Series Product in the current version.

Parent topic: Data Types and Operations