aclvdecGetChannelDesc Series

Applicability

Product	Supported
Atlas 350 Accelerator Card	☓
Atlas A3 training product/Atlas A3 inference product	√
Atlas A2 training product/Atlas A2 inference product	√
Atlas 200I/500 A2 inference product	√
Atlas inference product	√
Atlas training product	√

Function

Obtains the description of a video decoding channel.

Prototype

uint32_t aclvdecGetChannelDescChannelId(const aclvdecChannelDesc *channelDesc)
uint32_t aclvdecGetChannelDescThreadId(const aclvdecChannelDesc *channelDesc)
aclvdecCallback aclvdecGetChannelDescCallback(const aclvdecChannelDesc *channelDesc)
acldvppStreamFormat aclvdecGetChannelDescEnType(const aclvdecChannelDesc *channelDesc)
acldvppPixelFormat aclvdecGetChannelDescOutPicFormat(const aclvdecChannelDesc *channelDesc)
uint32_t aclvdecGetChannelDescOutPicWidth(const aclvdecChannelDesc *channelDesc)
uint32_t aclvdecGetChannelDescOutPicHeight(const aclvdecChannelDesc *channelDesc)
uint32_t aclvdecGetChannelDescRefFrameNum(const aclvdecChannelDesc *channelDesc)
uint32_t aclvdecGetChannelDescOutMode(const aclvdecChannelDesc *channelDesc)
uint32_t aclvdecGetChannelDescBitDepth(const aclvdecChannelDesc *channelDesc)

Parameters

Parameter	Input/Output	Description
channelDesc	Input	Pointer to the description of a video decoding channel. Call the aclvdecCreateChannelDesc API to create data of the aclvdecChannelDesc type and call the aclvdecSetChannelDesc series APIs to set the attribute value of the video decoding channel description in advance.

Parameter

Input/Output

Description

channelDesc

Input

Pointer to the description of a video decoding channel.

Call the aclvdecCreateChannelDesc API to create data of the aclvdecChannelDesc type and call the aclvdecSetChannelDesc series APIs to set the attribute value of the video decoding channel description in advance.

Returns

Parameter	Description
channelId	VDEC channel ID For the Atlas training product, the value range is [0, 31]. For the Atlas inference product, the value range is [0, 255]. For the Atlas 200I/500 A2 inference product, the value range is [0, 255]. For the Atlas A2 training product/Atlas A2 inference product, the value range is [0, 255]. For the Atlas A3 training product/Atlas A3 inference product, the value range is [0, 255].
threadId	Callback thread ID.
callback	Callback function. For details, see aclvdecCallback.
enType	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 about the type definition, see acldvppStreamFormat.
outPicFormat	YUV image storage format. For details about the type definition, see acldvppPixelFormat.
outPicWidth	Image width.
outPicHeight	Image height.
refFrameNum	Number of reference frames. Must be in the range of [0, 16]. For the Atlas training product, the value of this parameter is invalid in the current version and cannot be obtained.
outMode	Whether to output frames in real time (that is, one frame is sent and decoded without depending on the input of subsequent frames). The options are as follows: 0: delayed frame output mode. VDEC starts to output the decode result only after receiving multiple frames in the stream. 1: real-time frame output mode. VDEC starts to output the decode 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).
bitDepth	Video bit width. Value range: 0: 8-bit 1: 10-bit For the Atlas training product, the value of this parameter is invalid in the current version and cannot be obtained.

Parent topic: aclvdecChannelDesc