IMP_Decoder

Video Decoder modules, only support JEPG decode for now. More...

Collaboration diagram for IMP_Decoder:

Data Structures
struct	IMPDecoderAttr
	Attribute of Decoder. More...
struct	IMPDecoderCHNAttr
	Attribute of Decoder Channel. More...
struct	IMPDecoderNal
	Attribute of decode frame. More...
struct	IMPDecoderStream
	Attribute of decode stream. More...

Functions
int	IMP_Decoder_CreateChn (int decChn, const IMPDecoderCHNAttr *attr)
	Create Decoder channel. More...
int	IMP_Decoder_DestroyChn (int decChn)
	Destroy Decoder channel. More...
int	IMP_Decoder_StartRecvPic (int decChn)
	Decoder channel start recieve pictures. More...
int	IMP_Decoder_StopRecvPic (int decChn)
	Decoder channel stop recieve pictures. More...
int	IMP_Decoder_SendStreamTimeout (int decChn, IMPDecoderStream *stream, uint32_t timeoutMsec)
	Send frame to Decoder channel. More...
int	IMP_Decoder_PollingFrame (int decChn, uint32_t timeoutMsec)
	Polling Decoder channel, return when decoding finished or timeout. More...
int	IMP_Decoder_GetFrame (int decChn, IMPFrameInfo **frame)
	Get the decoded output frame. More...
int	IMP_Decoder_ReleaseFrame (int decChn, IMPFrameInfo *frame)
	Release the decoded output frame. More...

Detailed Description

Video Decoder modules, only support JEPG decode for now.

Function Documentation

int IMP_Decoder_CreateChn	(	int	decChn,
		const IMPDecoderCHNAttr *	attr
	)

Create Decoder channel.

Parameters

[in]	decChn	Channel Num. Value range: [0, NR_MAX_DEC_CHN - 1]
[in]	attr	Pointer to Decoder Channel attribute

Return values

0	Success
OtherValues	Failure

Remarks

None.

Attention

None.

int IMP_Decoder_DestroyChn

(

int

decChn

)

Destroy Decoder channel.

Parameters

[in]

decChn

Channel Num. Value range: [0, NR_MAX_DEC_CHN - 1]

Return values

0	Success
OtherValues	Failure

Remarks

None.

Attention

None.

int IMP_Decoder_GetFrame	(	int	decChn,
		IMPFrameInfo **	frame
	)

Get the decoded output frame.

Parameters

[in]	decChn	Channel Num. Value range: [0, NR_MAX_DEC_CHN - 1]
[out]	frame	Pointer to output frame's pointer

Return values

0	Success
OtherValues	Failure

Remarks

None.

Attention

The memory of output buffer is malloced in Decoder, So the input argument is a pointer of a pointer(pointer's address).

The decoding stream buffer is applied by the decoder, and the current function only needs to be introduced into the structure body pointer.

int IMP_Decoder_PollingFrame	(	int	decChn,
		uint32_t	timeoutMsec
	)

Polling Decoder channel, return when decoding finished or timeout.

Parameters

[in]	decChn	Channel Num. Value range: [0, NR_MAX_DEC_CHN - 1]
[in]	stream	Pointer to stream to be decoded.
[in]	timeoutMsec	Wait timeout value(msec).

Return values

0	Success
OtherValues	Failure

Remarks

None.

Attention

Failed if the channel isn't created.

int IMP_Decoder_ReleaseFrame	(	int	decChn,
		IMPFrameInfo *	frame
	)

Release the decoded output frame.

Parameters

[in]	decChn	Channel Num. Value range: [0, NR_MAX_DEC_CHN - 1]
[in]	frame	Pointer to output frame

Return values

0	Success
OtherValues	Failure

Remarks

None.

Attention

None.

int IMP_Decoder_SendStreamTimeout	(	int	decChn,
		IMPDecoderStream *	stream,
		uint32_t	timeoutMsec
	)

Send frame to Decoder channel.

Parameters

[in]	decChn	Channel Num. Value range: [0, NR_MAX_DEC_CHN - 1]
[in]	stream	Pointer to the Data stream structure to be decoded
[in]	timeoutMsec	Decode timeout value(msec).

Return values

0	Success
OtherValues	Failure

Remarks

None.

Attention

Failed if the channel isn't created.

int IMP_Decoder_StartRecvPic

(

int

decChn

)

Decoder channel start recieve pictures.

Parameters

[in]

decChn

Channel Num. Value range: [0, NR_MAX_DEC_CHN - 1]

Return values

0	Success
OtherValues	Failure

Remarks

First Open decoding Channel to receive the image then start decoding.

Attention

Failed if the channel isn't created.

int IMP_Decoder_StopRecvPic

(

int

decChn

)

Decoder channel stop recieve pictures.

Parameters

[in]

decChn

Channel Num. Value range: [0, NR_MAX_DEC_CHN - 1]

Return values

0	Success
OtherValues	Failure

Remarks

Stop decoding the Channel to receive image.

Attention

Failed if the channel isn't created.