Documentation
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Overview ¶
Package igbp defines shared constants for IGraphicBufferProducer interactions used by multiple camera-related commands.
Package igbp provides a minimal IGraphicBufferProducer stub backed by gralloc-allocated buffers, suitable for receiving camera frames.
Index ¶
- Constants
- func WriteEmptyFrameEventHistoryDelta(reply *parcel.Parcel)
- func WriteGrallocGraphicBuffer(p *parcel.Parcel, buf *gralloc.Buffer, bufID uint64)
- func WriteQueueBufferOutput(reply *parcel.Parcel)
- type AndroidStatus
- type IGBPTransaction
- type NativeWindowQuery
- type PixelFormat
- type ProducerStub
Constants ¶
const BufferNeedsRealloc = 0x1
BufferNeedsRealloc is BUFFER_NEEDS_REALLOCATION = 0x1.
const Descriptor = "android.gui.IGraphicBufferProducer"
Descriptor is the interface descriptor for IGraphicBufferProducer.
const GraphicBufferMagicGB01 = int32(0x47423031)
GraphicBufferMagicGB01 is the 'GB01' magic: 'G'<<24 | 'B'<<16 | '0'<<8 | '1'.
const MaxBufferSlots = 64
MaxBufferSlots matches BufferQueueDefs::NUM_BUFFER_SLOTS.
Variables ¶
This section is empty.
Functions ¶
func WriteEmptyFrameEventHistoryDelta ¶ added in v0.0.8
WriteEmptyFrameEventHistoryDelta writes an empty FrameEventHistoryDelta as a Flattenable: compositorTiming (3 * int64) + int32(0 deltas) = 28 bytes.
func WriteGrallocGraphicBuffer ¶ added in v0.0.8
WriteGrallocGraphicBuffer writes a flattened GraphicBuffer backed by a gralloc NativeHandle. The wire format follows GraphicBuffer::flatten():
int32(flattenedSize) + int32(fdCount) + raw[flattenedSize] + fd objects
func WriteQueueBufferOutput ¶ added in v0.0.8
WriteQueueBufferOutput writes a minimal QueueBufferOutput Flattenable.
Types ¶
type AndroidStatus ¶
type AndroidStatus int32
AndroidStatus represents an Android status/error code.
const ( StatusOK AndroidStatus = 0 StatusNoInit AndroidStatus = -19 )
Android status codes.
type IGBPTransaction ¶
type IGBPTransaction = binder.TransactionCode
IGBPTransaction identifies an IGraphicBufferProducer transaction code.
const ( RequestBuffer IGBPTransaction = 1 DequeueBuffer IGBPTransaction = 2 DetachBuffer IGBPTransaction = 3 DetachNextBuffer IGBPTransaction = 4 AttachBuffer IGBPTransaction = 5 QueueBuffer IGBPTransaction = 6 CancelBuffer IGBPTransaction = 7 Query IGBPTransaction = 8 Connect IGBPTransaction = 9 Disconnect IGBPTransaction = 10 SetSidebandStream IGBPTransaction = 11 AllocateBuffers IGBPTransaction = 12 AllowAllocation IGBPTransaction = 13 SetGenerationNumber IGBPTransaction = 14 GetConsumerName IGBPTransaction = 15 SetMaxDequeuedBufCount IGBPTransaction = 16 SetAsyncMode IGBPTransaction = 17 SetAutoRefresh IGBPTransaction = 19 SetDequeueTimeout IGBPTransaction = 20 GetLastQueuedBuffer IGBPTransaction = 21 GetFrameTimestamps IGBPTransaction = 22 GetUniqueId IGBPTransaction = 23 GetConsumerUsage IGBPTransaction = 24 SetLegacyBufferDrop IGBPTransaction = 25 SetAutoPrerotation IGBPTransaction = 26 )
Transaction codes from IGraphicBufferProducer.cpp. IBinder::FIRST_CALL_TRANSACTION == 1.
type NativeWindowQuery ¶
type NativeWindowQuery int32
NativeWindowQuery identifies a NATIVE_WINDOW query constant from <system/window.h>.
const ( NativeWindowWidth NativeWindowQuery = 0 NativeWindowHeight NativeWindowQuery = 1 NativeWindowFormat NativeWindowQuery = 2 NativeWindowMinUndequeued NativeWindowQuery = 3 NativeWindowQueuesToComposer NativeWindowQuery = 4 NativeWindowConcreteType NativeWindowQuery = 5 NativeWindowDefaultWidth NativeWindowQuery = 6 NativeWindowDefaultHeight NativeWindowQuery = 7 NativeWindowTransformHint NativeWindowQuery = 8 NativeWindowConsumerRunning NativeWindowQuery = 9 NativeWindowConsumerUsageBits NativeWindowQuery = 10 NativeWindowStickyTransform NativeWindowQuery = 11 NativeWindowDefaultDataspace NativeWindowQuery = 12 NativeWindowBufferAge NativeWindowQuery = 13 NativeWindowMaxBufferCount NativeWindowQuery = 21 NativeWindowSurface NativeWindowQuery = 1 // NATIVE_WINDOW_SURFACE for CONCRETE_TYPE )
NATIVE_WINDOW query constants from <system/window.h>.
type PixelFormat ¶
type PixelFormat int32
PixelFormat identifies an Android HAL pixel format.
const ( PixelFormatImplementationDefined PixelFormat = 0x22 // HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED PixelFormatYCbCr420_888 PixelFormat = 0x23 // HAL_PIXEL_FORMAT_YCbCr_420_888 )
Pixel formats.
type ProducerStub ¶ added in v0.0.8
type ProducerStub struct {
// ConsumerName is returned by the GetConsumerName transaction.
ConsumerName string
// contains filtered or unexported fields
}
ProducerStub implements a minimal IGraphicBufferProducer that provides gralloc-allocated buffers to the camera HAL. Queued frames are delivered via QueuedFrames().
func NewProducerStub ¶ added in v0.0.8
func NewProducerStub( width uint32, height uint32, grallocBufs [4]*gralloc.Buffer, ) *ProducerStub
NewProducerStub creates a new IGraphicBufferProducer stub backed by the given pre-allocated gralloc buffers.
func (*ProducerStub) Descriptor ¶ added in v0.0.8
func (g *ProducerStub) Descriptor() string
Descriptor implements binder.NativeTransactionHandler.
func (*ProducerStub) OnTransaction ¶ added in v0.0.8
func (g *ProducerStub) OnTransaction( _ context.Context, code binder.TransactionCode, data *parcel.Parcel, ) (*parcel.Parcel, error)
OnTransaction implements binder.NativeTransactionHandler.
func (*ProducerStub) QueuedFrames ¶ added in v0.0.8
func (g *ProducerStub) QueuedFrames() <-chan int
QueuedFrames returns a channel that receives the slot index each time the camera queues a buffer back.
func (*ProducerStub) SlotBuffer ¶ added in v0.0.8
func (g *ProducerStub) SlotBuffer(slot int) *gralloc.Buffer
SlotBuffer returns the gralloc buffer for the given slot, or nil if the slot has not been assigned yet.
Source Files