haven/nexgb/xvmc/xvmc.go

910 lines
20 KiB
Go

// Package xvmc is the X client API for the XVideo-MotionCompensation extension.
package xvmc
/*
This file was generated by xvmc.xml on May 10 2012 8:04:33pm EDT.
This file is automatically generated. Edit at your peril!
*/
import (
"github.com/BurntSushi/xgb"
"github.com/BurntSushi/xgb/xproto"
"github.com/BurntSushi/xgb/xv"
)
// Init must be called before using the XVideo-MotionCompensation extension.
func Init(c *xgb.Conn) error {
reply, err := xproto.QueryExtension(c, 25, "XVideo-MotionCompensation").Reply()
switch {
case err != nil:
return err
case !reply.Present:
return xgb.Errorf("No extension named XVideo-MotionCompensation could be found on on the server.")
}
xgb.ExtLock.Lock()
c.Extensions["XVideo-MotionCompensation"] = reply.MajorOpcode
for evNum, fun := range xgb.NewExtEventFuncs["XVideo-MotionCompensation"] {
xgb.NewEventFuncs[int(reply.FirstEvent)+evNum] = fun
}
for errNum, fun := range xgb.NewExtErrorFuncs["XVideo-MotionCompensation"] {
xgb.NewErrorFuncs[int(reply.FirstError)+errNum] = fun
}
xgb.ExtLock.Unlock()
return nil
}
func init() {
xgb.NewExtEventFuncs["XVideo-MotionCompensation"] = make(map[int]xgb.NewEventFun)
xgb.NewExtErrorFuncs["XVideo-MotionCompensation"] = make(map[int]xgb.NewErrorFun)
}
// Skipping definition for base type 'Float'
// Skipping definition for base type 'Card8'
// Skipping definition for base type 'Int16'
// Skipping definition for base type 'Int32'
// Skipping definition for base type 'Void'
// Skipping definition for base type 'Byte'
// Skipping definition for base type 'Int8'
// Skipping definition for base type 'Card16'
// Skipping definition for base type 'Char'
// Skipping definition for base type 'Card32'
// Skipping definition for base type 'Double'
// Skipping definition for base type 'Bool'
type Context uint32
func NewContextId(c *xgb.Conn) (Context, error) {
id, err := c.NewId()
if err != nil {
return 0, err
}
return Context(id), nil
}
type Surface uint32
func NewSurfaceId(c *xgb.Conn) (Surface, error) {
id, err := c.NewId()
if err != nil {
return 0, err
}
return Surface(id), nil
}
type Subpicture uint32
func NewSubpictureId(c *xgb.Conn) (Subpicture, error) {
id, err := c.NewId()
if err != nil {
return 0, err
}
return Subpicture(id), nil
}
// 'SurfaceInfo' struct definition
// Size: 24
type SurfaceInfo struct {
Id Surface
ChromaFormat uint16
Pad0 uint16
MaxWidth uint16
MaxHeight uint16
SubpictureMaxWidth uint16
SubpictureMaxHeight uint16
McType uint32
Flags uint32
}
// Struct read SurfaceInfo
func SurfaceInfoRead(buf []byte, v *SurfaceInfo) int {
b := 0
v.Id = Surface(xgb.Get32(buf[b:]))
b += 4
v.ChromaFormat = xgb.Get16(buf[b:])
b += 2
v.Pad0 = xgb.Get16(buf[b:])
b += 2
v.MaxWidth = xgb.Get16(buf[b:])
b += 2
v.MaxHeight = xgb.Get16(buf[b:])
b += 2
v.SubpictureMaxWidth = xgb.Get16(buf[b:])
b += 2
v.SubpictureMaxHeight = xgb.Get16(buf[b:])
b += 2
v.McType = xgb.Get32(buf[b:])
b += 4
v.Flags = xgb.Get32(buf[b:])
b += 4
return b
}
// Struct list read SurfaceInfo
func SurfaceInfoReadList(buf []byte, dest []SurfaceInfo) int {
b := 0
for i := 0; i < len(dest); i++ {
dest[i] = SurfaceInfo{}
b += SurfaceInfoRead(buf[b:], &dest[i])
}
return xgb.Pad(b)
}
// Struct write SurfaceInfo
func (v SurfaceInfo) Bytes() []byte {
buf := make([]byte, 24)
b := 0
xgb.Put32(buf[b:], uint32(v.Id))
b += 4
xgb.Put16(buf[b:], v.ChromaFormat)
b += 2
xgb.Put16(buf[b:], v.Pad0)
b += 2
xgb.Put16(buf[b:], v.MaxWidth)
b += 2
xgb.Put16(buf[b:], v.MaxHeight)
b += 2
xgb.Put16(buf[b:], v.SubpictureMaxWidth)
b += 2
xgb.Put16(buf[b:], v.SubpictureMaxHeight)
b += 2
xgb.Put32(buf[b:], v.McType)
b += 4
xgb.Put32(buf[b:], v.Flags)
b += 4
return buf
}
// Write struct list SurfaceInfo
func SurfaceInfoListBytes(buf []byte, list []SurfaceInfo) int {
b := 0
var structBytes []byte
for _, item := range list {
structBytes = item.Bytes()
copy(buf[b:], structBytes)
b += xgb.Pad(len(structBytes))
}
return b
}
// Request QueryVersion
// size: 4
type QueryVersionCookie struct {
*xgb.Cookie
}
func QueryVersion(c *xgb.Conn) QueryVersionCookie {
cookie := c.NewCookie(true, true)
c.NewRequest(queryVersionRequest(c), cookie)
return QueryVersionCookie{cookie}
}
func QueryVersionUnchecked(c *xgb.Conn) QueryVersionCookie {
cookie := c.NewCookie(false, true)
c.NewRequest(queryVersionRequest(c), cookie)
return QueryVersionCookie{cookie}
}
// Request reply for QueryVersion
// size: 16
type QueryVersionReply struct {
Sequence uint16
Length uint32
// padding: 1 bytes
Major uint32
Minor uint32
}
// Waits and reads reply data from request QueryVersion
func (cook QueryVersionCookie) Reply() (*QueryVersionReply, error) {
buf, err := cook.Cookie.Reply()
if err != nil {
return nil, err
}
if buf == nil {
return nil, nil
}
return queryVersionReply(buf), nil
}
// Read reply into structure from buffer for QueryVersion
func queryVersionReply(buf []byte) *QueryVersionReply {
v := new(QueryVersionReply)
b := 1 // skip reply determinant
b += 1 // padding
v.Sequence = xgb.Get16(buf[b:])
b += 2
v.Length = xgb.Get32(buf[b:]) // 4-byte units
b += 4
v.Major = xgb.Get32(buf[b:])
b += 4
v.Minor = xgb.Get32(buf[b:])
b += 4
return v
}
// Write request to wire for QueryVersion
func queryVersionRequest(c *xgb.Conn) []byte {
size := 4
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 0 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
return buf
}
// Request ListSurfaceTypes
// size: 8
type ListSurfaceTypesCookie struct {
*xgb.Cookie
}
func ListSurfaceTypes(c *xgb.Conn, PortId xv.Port) ListSurfaceTypesCookie {
cookie := c.NewCookie(true, true)
c.NewRequest(listSurfaceTypesRequest(c, PortId), cookie)
return ListSurfaceTypesCookie{cookie}
}
func ListSurfaceTypesUnchecked(c *xgb.Conn, PortId xv.Port) ListSurfaceTypesCookie {
cookie := c.NewCookie(false, true)
c.NewRequest(listSurfaceTypesRequest(c, PortId), cookie)
return ListSurfaceTypesCookie{cookie}
}
// Request reply for ListSurfaceTypes
// size: (32 + xgb.Pad((int(Num) * 24)))
type ListSurfaceTypesReply struct {
Sequence uint16
Length uint32
// padding: 1 bytes
Num uint32
// padding: 20 bytes
Surfaces []SurfaceInfo // size: xgb.Pad((int(Num) * 24))
}
// Waits and reads reply data from request ListSurfaceTypes
func (cook ListSurfaceTypesCookie) Reply() (*ListSurfaceTypesReply, error) {
buf, err := cook.Cookie.Reply()
if err != nil {
return nil, err
}
if buf == nil {
return nil, nil
}
return listSurfaceTypesReply(buf), nil
}
// Read reply into structure from buffer for ListSurfaceTypes
func listSurfaceTypesReply(buf []byte) *ListSurfaceTypesReply {
v := new(ListSurfaceTypesReply)
b := 1 // skip reply determinant
b += 1 // padding
v.Sequence = xgb.Get16(buf[b:])
b += 2
v.Length = xgb.Get32(buf[b:]) // 4-byte units
b += 4
v.Num = xgb.Get32(buf[b:])
b += 4
b += 20 // padding
v.Surfaces = make([]SurfaceInfo, v.Num)
b += SurfaceInfoReadList(buf[b:], v.Surfaces)
return v
}
// Write request to wire for ListSurfaceTypes
func listSurfaceTypesRequest(c *xgb.Conn, PortId xv.Port) []byte {
size := 8
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 1 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put32(buf[b:], uint32(PortId))
b += 4
return buf
}
// Request CreateContext
// size: 24
type CreateContextCookie struct {
*xgb.Cookie
}
func CreateContext(c *xgb.Conn, ContextId Context, PortId xv.Port, SurfaceId Surface, Width uint16, Height uint16, Flags uint32) CreateContextCookie {
cookie := c.NewCookie(true, true)
c.NewRequest(createContextRequest(c, ContextId, PortId, SurfaceId, Width, Height, Flags), cookie)
return CreateContextCookie{cookie}
}
func CreateContextUnchecked(c *xgb.Conn, ContextId Context, PortId xv.Port, SurfaceId Surface, Width uint16, Height uint16, Flags uint32) CreateContextCookie {
cookie := c.NewCookie(false, true)
c.NewRequest(createContextRequest(c, ContextId, PortId, SurfaceId, Width, Height, Flags), cookie)
return CreateContextCookie{cookie}
}
// Request reply for CreateContext
// size: (36 + xgb.Pad((int(Length) * 4)))
type CreateContextReply struct {
Sequence uint16
Length uint32
// padding: 1 bytes
WidthActual uint16
HeightActual uint16
FlagsReturn uint32
// padding: 20 bytes
PrivData []uint32 // size: xgb.Pad((int(Length) * 4))
}
// Waits and reads reply data from request CreateContext
func (cook CreateContextCookie) Reply() (*CreateContextReply, error) {
buf, err := cook.Cookie.Reply()
if err != nil {
return nil, err
}
if buf == nil {
return nil, nil
}
return createContextReply(buf), nil
}
// Read reply into structure from buffer for CreateContext
func createContextReply(buf []byte) *CreateContextReply {
v := new(CreateContextReply)
b := 1 // skip reply determinant
b += 1 // padding
v.Sequence = xgb.Get16(buf[b:])
b += 2
v.Length = xgb.Get32(buf[b:]) // 4-byte units
b += 4
v.WidthActual = xgb.Get16(buf[b:])
b += 2
v.HeightActual = xgb.Get16(buf[b:])
b += 2
v.FlagsReturn = xgb.Get32(buf[b:])
b += 4
b += 20 // padding
v.PrivData = make([]uint32, v.Length)
for i := 0; i < int(v.Length); i++ {
v.PrivData[i] = xgb.Get32(buf[b:])
b += 4
}
b = xgb.Pad(b)
return v
}
// Write request to wire for CreateContext
func createContextRequest(c *xgb.Conn, ContextId Context, PortId xv.Port, SurfaceId Surface, Width uint16, Height uint16, Flags uint32) []byte {
size := 24
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 2 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put32(buf[b:], uint32(ContextId))
b += 4
xgb.Put32(buf[b:], uint32(PortId))
b += 4
xgb.Put32(buf[b:], uint32(SurfaceId))
b += 4
xgb.Put16(buf[b:], Width)
b += 2
xgb.Put16(buf[b:], Height)
b += 2
xgb.Put32(buf[b:], Flags)
b += 4
return buf
}
// Request DestroyContext
// size: 8
type DestroyContextCookie struct {
*xgb.Cookie
}
// Write request to wire for DestroyContext
func DestroyContext(c *xgb.Conn, ContextId Context) DestroyContextCookie {
cookie := c.NewCookie(false, false)
c.NewRequest(destroyContextRequest(c, ContextId), cookie)
return DestroyContextCookie{cookie}
}
func DestroyContextChecked(c *xgb.Conn, ContextId Context) DestroyContextCookie {
cookie := c.NewCookie(true, false)
c.NewRequest(destroyContextRequest(c, ContextId), cookie)
return DestroyContextCookie{cookie}
}
func (cook DestroyContextCookie) Check() error {
return cook.Cookie.Check()
}
// Write request to wire for DestroyContext
func destroyContextRequest(c *xgb.Conn, ContextId Context) []byte {
size := 8
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 3 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put32(buf[b:], uint32(ContextId))
b += 4
return buf
}
// Request CreateSurface
// size: 12
type CreateSurfaceCookie struct {
*xgb.Cookie
}
func CreateSurface(c *xgb.Conn, SurfaceId Surface, ContextId Context) CreateSurfaceCookie {
cookie := c.NewCookie(true, true)
c.NewRequest(createSurfaceRequest(c, SurfaceId, ContextId), cookie)
return CreateSurfaceCookie{cookie}
}
func CreateSurfaceUnchecked(c *xgb.Conn, SurfaceId Surface, ContextId Context) CreateSurfaceCookie {
cookie := c.NewCookie(false, true)
c.NewRequest(createSurfaceRequest(c, SurfaceId, ContextId), cookie)
return CreateSurfaceCookie{cookie}
}
// Request reply for CreateSurface
// size: (32 + xgb.Pad((int(Length) * 4)))
type CreateSurfaceReply struct {
Sequence uint16
Length uint32
// padding: 1 bytes
// padding: 24 bytes
PrivData []uint32 // size: xgb.Pad((int(Length) * 4))
}
// Waits and reads reply data from request CreateSurface
func (cook CreateSurfaceCookie) Reply() (*CreateSurfaceReply, error) {
buf, err := cook.Cookie.Reply()
if err != nil {
return nil, err
}
if buf == nil {
return nil, nil
}
return createSurfaceReply(buf), nil
}
// Read reply into structure from buffer for CreateSurface
func createSurfaceReply(buf []byte) *CreateSurfaceReply {
v := new(CreateSurfaceReply)
b := 1 // skip reply determinant
b += 1 // padding
v.Sequence = xgb.Get16(buf[b:])
b += 2
v.Length = xgb.Get32(buf[b:]) // 4-byte units
b += 4
b += 24 // padding
v.PrivData = make([]uint32, v.Length)
for i := 0; i < int(v.Length); i++ {
v.PrivData[i] = xgb.Get32(buf[b:])
b += 4
}
b = xgb.Pad(b)
return v
}
// Write request to wire for CreateSurface
func createSurfaceRequest(c *xgb.Conn, SurfaceId Surface, ContextId Context) []byte {
size := 12
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 4 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put32(buf[b:], uint32(SurfaceId))
b += 4
xgb.Put32(buf[b:], uint32(ContextId))
b += 4
return buf
}
// Request DestroySurface
// size: 8
type DestroySurfaceCookie struct {
*xgb.Cookie
}
// Write request to wire for DestroySurface
func DestroySurface(c *xgb.Conn, SurfaceId Surface) DestroySurfaceCookie {
cookie := c.NewCookie(false, false)
c.NewRequest(destroySurfaceRequest(c, SurfaceId), cookie)
return DestroySurfaceCookie{cookie}
}
func DestroySurfaceChecked(c *xgb.Conn, SurfaceId Surface) DestroySurfaceCookie {
cookie := c.NewCookie(true, false)
c.NewRequest(destroySurfaceRequest(c, SurfaceId), cookie)
return DestroySurfaceCookie{cookie}
}
func (cook DestroySurfaceCookie) Check() error {
return cook.Cookie.Check()
}
// Write request to wire for DestroySurface
func destroySurfaceRequest(c *xgb.Conn, SurfaceId Surface) []byte {
size := 8
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 5 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put32(buf[b:], uint32(SurfaceId))
b += 4
return buf
}
// Request CreateSubpicture
// size: 20
type CreateSubpictureCookie struct {
*xgb.Cookie
}
func CreateSubpicture(c *xgb.Conn, SubpictureId Subpicture, Context Context, XvimageId uint32, Width uint16, Height uint16) CreateSubpictureCookie {
cookie := c.NewCookie(true, true)
c.NewRequest(createSubpictureRequest(c, SubpictureId, Context, XvimageId, Width, Height), cookie)
return CreateSubpictureCookie{cookie}
}
func CreateSubpictureUnchecked(c *xgb.Conn, SubpictureId Subpicture, Context Context, XvimageId uint32, Width uint16, Height uint16) CreateSubpictureCookie {
cookie := c.NewCookie(false, true)
c.NewRequest(createSubpictureRequest(c, SubpictureId, Context, XvimageId, Width, Height), cookie)
return CreateSubpictureCookie{cookie}
}
// Request reply for CreateSubpicture
// size: (32 + xgb.Pad((int(Length) * 4)))
type CreateSubpictureReply struct {
Sequence uint16
Length uint32
// padding: 1 bytes
WidthActual uint16
HeightActual uint16
NumPaletteEntries uint16
EntryBytes uint16
ComponentOrder []byte // size: 4
// padding: 12 bytes
PrivData []uint32 // size: xgb.Pad((int(Length) * 4))
}
// Waits and reads reply data from request CreateSubpicture
func (cook CreateSubpictureCookie) Reply() (*CreateSubpictureReply, error) {
buf, err := cook.Cookie.Reply()
if err != nil {
return nil, err
}
if buf == nil {
return nil, nil
}
return createSubpictureReply(buf), nil
}
// Read reply into structure from buffer for CreateSubpicture
func createSubpictureReply(buf []byte) *CreateSubpictureReply {
v := new(CreateSubpictureReply)
b := 1 // skip reply determinant
b += 1 // padding
v.Sequence = xgb.Get16(buf[b:])
b += 2
v.Length = xgb.Get32(buf[b:]) // 4-byte units
b += 4
v.WidthActual = xgb.Get16(buf[b:])
b += 2
v.HeightActual = xgb.Get16(buf[b:])
b += 2
v.NumPaletteEntries = xgb.Get16(buf[b:])
b += 2
v.EntryBytes = xgb.Get16(buf[b:])
b += 2
v.ComponentOrder = make([]byte, 4)
copy(v.ComponentOrder[:4], buf[b:])
b += xgb.Pad(int(4))
b += 12 // padding
v.PrivData = make([]uint32, v.Length)
for i := 0; i < int(v.Length); i++ {
v.PrivData[i] = xgb.Get32(buf[b:])
b += 4
}
b = xgb.Pad(b)
return v
}
// Write request to wire for CreateSubpicture
func createSubpictureRequest(c *xgb.Conn, SubpictureId Subpicture, Context Context, XvimageId uint32, Width uint16, Height uint16) []byte {
size := 20
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 6 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put32(buf[b:], uint32(SubpictureId))
b += 4
xgb.Put32(buf[b:], uint32(Context))
b += 4
xgb.Put32(buf[b:], XvimageId)
b += 4
xgb.Put16(buf[b:], Width)
b += 2
xgb.Put16(buf[b:], Height)
b += 2
return buf
}
// Request DestroySubpicture
// size: 8
type DestroySubpictureCookie struct {
*xgb.Cookie
}
// Write request to wire for DestroySubpicture
func DestroySubpicture(c *xgb.Conn, SubpictureId Subpicture) DestroySubpictureCookie {
cookie := c.NewCookie(false, false)
c.NewRequest(destroySubpictureRequest(c, SubpictureId), cookie)
return DestroySubpictureCookie{cookie}
}
func DestroySubpictureChecked(c *xgb.Conn, SubpictureId Subpicture) DestroySubpictureCookie {
cookie := c.NewCookie(true, false)
c.NewRequest(destroySubpictureRequest(c, SubpictureId), cookie)
return DestroySubpictureCookie{cookie}
}
func (cook DestroySubpictureCookie) Check() error {
return cook.Cookie.Check()
}
// Write request to wire for DestroySubpicture
func destroySubpictureRequest(c *xgb.Conn, SubpictureId Subpicture) []byte {
size := 8
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 7 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put32(buf[b:], uint32(SubpictureId))
b += 4
return buf
}
// Request ListSubpictureTypes
// size: 12
type ListSubpictureTypesCookie struct {
*xgb.Cookie
}
func ListSubpictureTypes(c *xgb.Conn, PortId xv.Port, SurfaceId Surface) ListSubpictureTypesCookie {
cookie := c.NewCookie(true, true)
c.NewRequest(listSubpictureTypesRequest(c, PortId, SurfaceId), cookie)
return ListSubpictureTypesCookie{cookie}
}
func ListSubpictureTypesUnchecked(c *xgb.Conn, PortId xv.Port, SurfaceId Surface) ListSubpictureTypesCookie {
cookie := c.NewCookie(false, true)
c.NewRequest(listSubpictureTypesRequest(c, PortId, SurfaceId), cookie)
return ListSubpictureTypesCookie{cookie}
}
// Request reply for ListSubpictureTypes
// size: (32 + xv.ImageFormatInfoListSize(Types))
type ListSubpictureTypesReply struct {
Sequence uint16
Length uint32
// padding: 1 bytes
Num uint32
// padding: 20 bytes
Types []xv.ImageFormatInfo // size: xv.ImageFormatInfoListSize(Types)
}
// Waits and reads reply data from request ListSubpictureTypes
func (cook ListSubpictureTypesCookie) Reply() (*ListSubpictureTypesReply, error) {
buf, err := cook.Cookie.Reply()
if err != nil {
return nil, err
}
if buf == nil {
return nil, nil
}
return listSubpictureTypesReply(buf), nil
}
// Read reply into structure from buffer for ListSubpictureTypes
func listSubpictureTypesReply(buf []byte) *ListSubpictureTypesReply {
v := new(ListSubpictureTypesReply)
b := 1 // skip reply determinant
b += 1 // padding
v.Sequence = xgb.Get16(buf[b:])
b += 2
v.Length = xgb.Get32(buf[b:]) // 4-byte units
b += 4
v.Num = xgb.Get32(buf[b:])
b += 4
b += 20 // padding
v.Types = make([]xv.ImageFormatInfo, v.Num)
b += xv.ImageFormatInfoReadList(buf[b:], v.Types)
return v
}
// Write request to wire for ListSubpictureTypes
func listSubpictureTypesRequest(c *xgb.Conn, PortId xv.Port, SurfaceId Surface) []byte {
size := 12
b := 0
buf := make([]byte, size)
buf[b] = c.Extensions["XVIDEO-MOTIONCOMPENSATION"]
b += 1
buf[b] = 8 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put32(buf[b:], uint32(PortId))
b += 4
xgb.Put32(buf[b:], uint32(SurfaceId))
b += 4
return buf
}