Texas Instruments DM365, User Manual

Page: 129 / 131

Simple Two-pass Encoding Sample Usage
E-5
Copy metadata from low-resolution to high
resolution;
}
**********************************************************
Input Buffer requirement by high resolution encoder
Structure Name Buffer Size
FrameInfo_Interface sizeof(FrameInfo_Interface);
Inside Codec:
**********************************************************
If(metaDataGenerateConsume of high resolution is 2) /*
Will be used in High resolution encoder */
{
/*
* Use metadata given by low resolution encoder to
* take appropriate decisions.
*/
}
**********************************************************
Once the information is consumed and encoding of high-resolution encoder
is done, set the value of
metaDataGenerateConsume
flag of low
resolution encoder instance to 1.
At application:
**********************************************************
Set metaDataGenerateConsume flag of low resolution encoder
to 1;
**********************************************************
Note:
‰
When setting dynamicparams . metaDataGenerateConsume = 2, for
the high resolution encoder, the low resolution encoder must be run with
dynamic params.metaDataGenerateConsume = 1, else severe
quality degradation will occur.
‰
The usage of the generated metaData by the high resolution encoder is
internal to the codec and no further input is required from the end user.
‰
If the current frame at low resolution encoder is encoded as IDR/I frame
then no scene change information is passed to high resolution encoder.
‰
STP works with ROI enabled also.
‰
When the scenechange is detected at low resolution encoder, IDR frame is
forced at high resolution encoder at the corresponding frame number.