Texas Instruments DM6467, User Manual

Page: 47 / 78

API Reference
4-11
4.2.1.4 XDM1_SingleBufDesc
║ Description
This structure defines the buffer descriptor for single input and output buffers.
║ Fields
Field Datatype Input/
Output Description
*bufs XDAS_Int8 Input Pointer to the buffer
bufSize XDAS_Int32 Input Size of the buffer in bytes
accessMask XDAS_Int32 Output If the buffer was not accessed by the algorithm
processor (for example, it was filled by DMA or other
hardware accelerator that does not write through the
algorithm CPU), then bits in this mask should not be
set.
4.2.1.5 XDM_AlgBufInfo
║ Description
This structure defines the buffer information descriptor for input and output
buffers. This structure is filled when you invoke the
control()
function
with the
XDM_GETBUFINFO
command.
║
Fields
Field Datatype Input/
Output Description
minNumInBufs XDAS_Int32 Output Number of input buffers
minNumOutBufs XDAS_Int32 Output Number of output buffers
minInBufSize[XDM_
MAX_IO_BUFFERS] XDAS_Int32
Output Size in bytes required for each input buffer
minOutBufSize[XDM
_MAX_IO_BUFFERS] XDAS_Int32
Output Size in bytes required for each output buffer
Note:
For H.264 Encoder, the buffer details are:
‰ Number of input buffers required is 2 for YUV420P
‰ Number of output buffer required is 1
‰ The input buffer sizes (in bytes) for 1080i format are:
For YUV 420:
Y buffer = 1920 * 1088
UV buffer = 1920 * 544