Texas Instruments DM365, User Manual

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API Reference
4-24
capture width is same as input width. For details on capture width, see
Section 4.2.1.10.
For interlaced sequence, encoder ignores the input field buffers if they
are stored in interleaved or non-interleaved format. But, it expects the
start pointer of top or bottom field be given to it during the process call
of the top or bottom fields, respectively. The pitch to move to the next
line of the field is conveyed using
captureWidth
of
DynamicParams
.
‰ There is no restriction on output buffer size except that it should be
enough to store one frame of encoded data.The output buffer size
returned by the
XDM_GETBUFINFO
command assumes that the worst
case output buffer size is (
frameHeight*frameWidth
)/2.
‰ In case of STP, low resolution needs an extra output buffer to pass
metadata information from codec to application. High resolution
needs an extra input buffer to pass metadata information from
application to codec. The metadata is copied from output buffer of
low resolution encoder to the input buffer of high resolution encoder.
These are the maximum buffer sizes, but you can reconfigure
depending on the format of the bit-stream.
4.2.1.3 XDM1_BufDesc
║
Description
This structure defines the buffer descriptor for input and output buffers in
XDM 1.0 IVIDENC1.
║
Fields
Field Data type Input/
Output Description
numBufs XDAS_Int32
Input Number of buffers
descs[XDM_MAX_I
O_BUFFERS] XDM1_Singl
eBufDesc Input Array of buffer descriptors.
4.2.1.4 XDM_SingleBufDesc
║
Description
This structure defines the single buffer descriptor for input and output
buffers in XDM 1.0 IVIDENC1.
║
Fields
Field Data type Input/
Output Description
*buf XDAS_Int8 Input Pointer to a buffer address
bufSize XDAS_Int32
Input Size of the buffer in bytes