gecko-dev/dom/camera/GonkNativeWindow.h

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/*
* Copyright (C) 2010 The Android Open Source Project
* Copyright (C) 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef DOM_CAMERA_GONKNATIVEWINDOW_H
#define DOM_CAMERA_GONKNATIVEWINDOW_H
#include <stdint.h>
#include <sys/types.h>
#include <gui/ISurfaceTexture.h>
#include <ui/egl/android_natives.h>
#include <ui/GraphicBuffer.h>
#include <ui/Rect.h>
#include <utils/Errors.h>
#include <utils/RefBase.h>
#include <utils/String8.h>
#include <utils/threads.h>
#include "mozilla/layers/LayersSurfaces.h"
#include "mozilla/layers/ImageBridgeChild.h"
#include "GonkIOSurfaceImage.h"
#include "CameraCommon.h"
namespace android {
// The user of GonkNativeWindow who wants to receive notification of
// new frames should implement this interface.
class GonkNativeWindowNewFrameCallback {
public:
virtual void OnNewFrame() = 0;
};
class GonkNativeWindow : public BnSurfaceTexture
{
friend class GonkNativeWindowClient;
typedef mozilla::layers::SurfaceDescriptor SurfaceDescriptor;
typedef mozilla::layers::GraphicBufferLocked GraphicBufferLocked;
public:
enum { MIN_UNDEQUEUED_BUFFERS = 2 };
enum { MIN_BUFFER_SLOTS = MIN_UNDEQUEUED_BUFFERS };
enum { NUM_BUFFER_SLOTS = 32 };
enum { NO_CONNECTED_API = 0 };
enum { NATIVE_WINDOW_SET_BUFFERS_SIZE = 0x10000000 };
GonkNativeWindow();
~GonkNativeWindow(); // this class cannot be overloaded
// Get next frame from the queue and mark it as RENDERING, caller
// owns the returned buffer.
already_AddRefed<GraphicBufferLocked> getCurrentBuffer();
// Return the buffer to the queue and mark it as FREE. After that
// the buffer is useable again for the decoder.
bool returnBuffer(uint32_t index, uint32_t generation);
// setBufferCount updates the number of available buffer slots. After
// calling this all buffer slots are owned by the GonkNativeWindow object
// (i.e. they are not owned by the client).
virtual status_t setBufferCount(int bufferCount);
// requestBuffer requests a new buffer for the given index.
virtual status_t requestBuffer(int slot, sp<GraphicBuffer>* buf);
// dequeueBuffer gets the next buffer slot index for the client to use. If a
// buffer slot is available then that slot index is written to the location
// pointed to by the buf argument and a status of OK is returned. If no
// slot is available then a status of -EBUSY is returned and buf is
// unmodified.
virtual status_t dequeueBuffer(int *buf, uint32_t width, uint32_t height,
uint32_t format, uint32_t usage);
// queueBuffer returns a filled buffer to the GonkNativeWindow. In addition,
// a timestamp must be provided for the buffer. The timestamp is in
// nanoseconds, and must be monotonically increasing. Its other semantics
// (zero point, etc) are client-dependent and should be documented by the
// client.
virtual status_t queueBuffer(int buf, int64_t timestamp,
uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform);
virtual void cancelBuffer(int buf);
virtual status_t setCrop(const Rect& reg);
virtual status_t setTransform(uint32_t transform);
virtual status_t setScalingMode(int mode);
virtual int query(int what, int* value);
// Qcom specific function
virtual int performQcomOperation(int operation, int arg1, int arg2, int arg3) {
return OK;
}
// GonkNativeWindow do not implement the function and always works in
// synchronous mode.
virtual status_t setSynchronousMode(bool enabled);
// connect attempts to connect a client API to the GonkNativeWindow.
//
// This method will fail if the connect was previously called on the
// GonkNativeWindow and no corresponding disconnect call was made.
virtual status_t connect(int api,
uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform);
// disconnect attempts to disconnect a client API from the GonkNativeWindow.
// This method will fail if the the GonkNativeWindow is not currently
// connected to the specified client API.
virtual status_t disconnect(int api);
void setNewFrameCallback(GonkNativeWindowNewFrameCallback* aCallback);
// setDefaultBufferSize is used to set the size of buffers returned by
// requestBuffers when a with and height of zero is requested.
// A call to setDefaultBufferSize() may trigger requestBuffers() to
// be called from the client.
status_t setDefaultBufferSize(uint32_t width, uint32_t height);
// abandon frees all the buffers and puts the GonkNativeWindow into the
// 'abandoned' state. Once put in this state the GonkNativeWindow can never
// leave it. When in the 'abandoned' state, all methods of the
// ISurfaceTexture interface will fail with the NO_INIT error.
//
// Note that while calling this method causes all the buffers to be freed
// from the perspective of the the GonkNativeWindow, if there are additional
// references on the buffers (e.g. if a buffer is referenced by a client)
// then those buffer will remain allocated.
void abandon();
SurfaceDescriptor *getSurfaceDescriptorFromBuffer(ANativeWindowBuffer* buffer);
protected:
// freeAllBuffersLocked frees the resources (both GraphicBuffer and
// EGLImage) for all slots by removing them from the slots and appending
// then to the freeList. This must be called with mMutex locked.
void freeAllBuffersLocked(nsTArray<SurfaceDescriptor>& freeList);
// releaseBufferFreeListUnlocked releases the resources in the freeList;
// this must be called with mMutex unlocked.
void releaseBufferFreeListUnlocked(nsTArray<SurfaceDescriptor>& freeList);
// clearRenderingStateBuffersLocked clear the resources in RENDERING state;
// But do not destroy the gralloc buffer. It is still in the video stream
// awaiting rendering.
// this must be called with mMutex locked.
void clearRenderingStateBuffersLocked();
private:
void init();
int getSlotFromBufferLocked(android_native_buffer_t* buffer) const;
enum { INVALID_BUFFER_SLOT = -1 };
struct BufferSlot {
BufferSlot()
: mBufferState(BufferSlot::FREE),
mTimestamp(0),
mFrameNumber(0){
}
// mGraphicBuffer points to the buffer allocated for this slot or is NULL
// if no buffer has been allocated.
sp<GraphicBuffer> mGraphicBuffer;
// mSurfaceDescriptor is the token to remotely allocated GraphicBuffer.
SurfaceDescriptor mSurfaceDescriptor;
// BufferState represents the different states in which a buffer slot
// can be.
enum BufferState {
// FREE indicates that the buffer is not currently being used and
// will not be used in the future until it gets dequeued and
// subsequently queued by the client.
FREE = 0,
// DEQUEUED indicates that the buffer has been dequeued by the
// client, but has not yet been queued or canceled. The buffer is
// considered 'owned' by the client, and the server should not use
// it for anything.
//
// Note that when in synchronous-mode (mSynchronousMode == true),
// the buffer that's currently attached to the texture may be
// dequeued by the client. That means that the current buffer can
// be in either the DEQUEUED or QUEUED state. In asynchronous mode,
// however, the current buffer is always in the QUEUED state.
DEQUEUED = 1,
// QUEUED indicates that the buffer has been queued by the client,
// and has not since been made available for the client to dequeue.
// Attaching the buffer to the texture does NOT transition the
// buffer away from the QUEUED state. However, in Synchronous mode
// the current buffer may be dequeued by the client under some
// circumstances. See the note about the current buffer in the
// documentation for DEQUEUED.
QUEUED = 2,
// RENDERING indicates that the buffer has been sent to
// the compositor, and has not yet available for the
// client to dequeue. When the compositor has finished its
// job, the buffer will be returned to FREE state.
RENDERING = 3,
};
// mBufferState is the current state of this buffer slot.
BufferState mBufferState;
// mRequestBufferCalled is used for validating that the client did
// call requestBuffer() when told to do so. Technically this is not
// needed but useful for debugging and catching client bugs.
bool mRequestBufferCalled;
// mTimestamp is the current timestamp for this buffer slot. This gets
// to set by queueBuffer each time this slot is queued.
int64_t mTimestamp;
// mFrameNumber is the number of the queued frame for this slot.
uint64_t mFrameNumber;
};
// mSlots is the array of buffer slots that must be mirrored on the client
// side. This allows buffer ownership to be transferred between the client
// and server without sending a GraphicBuffer over binder. The entire array
// is initialized to NULL at construction time, and buffers are allocated
// for a slot when requestBuffer is called with that slot's index.
BufferSlot mSlots[NUM_BUFFER_SLOTS];
// mDequeueCondition condition used for dequeueBuffer in synchronous mode
mutable Condition mDequeueCondition;
// mAbandoned indicates that the GonkNativeWindow will no longer be used to
// consume buffers pushed to it.
// It is initialized to false, and set to true in the abandon method. A
// GonkNativeWindow that has been abandoned will return the NO_INIT error
// from all control methods capable of returning an error.
bool mAbandoned;
// mTimestamp is the timestamp that will be used for the next buffer queue
// operation. It defaults to NATIVE_WINDOW_TIMESTAMP_AUTO, which means that
// a timestamp is auto-generated when queueBuffer is called.
int64_t mTimestamp;
// mDefaultWidth holds the default width of allocated buffers. It is used
// in requestBuffers() if a width and height of zero is specified.
uint32_t mDefaultWidth;
// mDefaultHeight holds the default height of allocated buffers. It is used
// in requestBuffers() if a width and height of zero is specified.
uint32_t mDefaultHeight;
// mPixelFormat holds the pixel format of allocated buffers. It is used
// in requestBuffers() if a format of zero is specified.
uint32_t mPixelFormat;
// mBufferCount is the number of buffer slots that the client and server
// must maintain. It defaults to MIN_BUFFER_SLOTS + 1 and can be changed
// by calling setBufferCount or setBufferCountServer
int mBufferCount;
// mConnectedApi indicates the API that is currently connected to this
// GonkNativeWindow. It defaults to NO_CONNECTED_API (= 0), and gets updated
// by the connect and disconnect methods.
int mConnectedApi;
// mQueue is a FIFO of queued buffers used in synchronous mode
// GonkNativeWindow always works in synchronous mode
typedef Vector<int> Fifo;
Fifo mQueue;
// mMutex is the mutex used to prevent concurrent access to the member
// variables of GonkNativeWindow objects. It must be locked whenever the
// member variables are accessed.
mutable Mutex mMutex;
// mFrameCounter is the free running counter, incremented for every buffer queued
uint64_t mFrameCounter;
// mGeneration is the current generation of buffer slots
uint32_t mGeneration;
GonkNativeWindowNewFrameCallback* mNewFrameCallback;
};
// CameraGraphicBuffer maintains the buffer returned from GonkNativeWindow
class CameraGraphicBuffer : public mozilla::layers::GraphicBufferLocked
{
typedef mozilla::layers::SurfaceDescriptor SurfaceDescriptor;
typedef mozilla::layers::ImageBridgeChild ImageBridgeChild;
public:
CameraGraphicBuffer(GonkNativeWindow* aNativeWindow,
uint32_t aIndex,
uint32_t aGeneration,
SurfaceDescriptor aBuffer)
: GraphicBufferLocked(aBuffer)
, mNativeWindow(aNativeWindow)
, mIndex(aIndex)
, mGeneration(aGeneration)
, mLocked(true)
{
DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
}
virtual ~CameraGraphicBuffer()
{
DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
}
// Unlock either returns the buffer to the native window or
// destroys the buffer if the window is already released.
virtual void Unlock() MOZ_OVERRIDE
{
if (mLocked) {
// The window might have been destroyed. The buffer is no longer
// valid at that point.
sp<GonkNativeWindow> window = mNativeWindow.promote();
if (window.get() && window->returnBuffer(mIndex, mGeneration)) {
mLocked = false;
} else {
// If the window doesn't exist any more, release the buffer
// directly.
ImageBridgeChild *ibc = ImageBridgeChild::GetSingleton();
ibc->DeallocSurfaceDescriptorGralloc(mSurfaceDescriptor);
}
}
}
protected:
wp<GonkNativeWindow> mNativeWindow;
uint32_t mIndex;
uint32_t mGeneration;
bool mLocked;
};
}; // namespace android
#endif // DOM_CAMERA_GONKNATIVEWINDOW_H