XMA2Defs

XMA2Defs APIs

Functions

Function	Description
GetLastXmaFrameBitPosition	Calculates the bit offset of the last complete frame in an XMA block or a set of blocks.
GetStandardChannelMaskFromXmaMask	Converts between WAVEFORMATEXTENSIBLE channel masks and XMA channel masks.
GetXmaBlockContainingSample	Use a specified seek table to find the XMA block that contains a specified decoded sample.
GetXmaChannelMaskFromStandardMask	Converts between WAVEFORMATEXTENSIBLE channel masks and XMA channel masks.
GetXmaDecodePositionForSample	Obtains the information needed to make the decoder generate audio starting at a specified sample position relative to the beginning of the specified XMA block.
GetXmaFrameBitPosition	Calculates the bit offset of a specified frame within an XMA block or a set of blocks.
GetXmaFrameLengthInBits	Reads a specified frame’s LengthInBits field.
GetXmaPacketFirstFrameOffsetInBits	Helper function for the XMA2PACKET structure. Returns the first frame offset.
GetXmaPacketFrameCount	Helper function for the XMA2PACKET structure. Returns the packet frame count.
GetXmaPacketMetadata	Helper function for the XMA2PACKET structure.
GetXmaPacketSkipCount	Helper function for the XMA2PACKET structure. Returns the packets from other streams to skip.
GetXmaSampleRate	Obtains the legal XMA sample rate (24, 32, 44.1, or 48 KHz) that corresponds to a generic sample rate.
LocalizeXma2Format	Modifies an XMA2WAVEFORMATEX structure in place to comply with the current platform’s byte-ordering rules (little-endian or big-endian).

Structure	Description
XMA2PACKET	XMA packet structure (in big-endian form).
XMA2STREAMFORMAT	Structure used in XMA2WAVEFORMAT for per-stream data.
XMA2WAVEFORMAT	Legacy XMA2 format structure in big-endian byte order.
XMA2WAVEFORMATEX	The recommended way to express format information for XMA2 files.
XMASTREAMFORMAT	Used in XMAWAVEFORMAT for per-stream data.
XMAWAVEFORMAT	Structure of the legacy XMA1 format.