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replicant-frameworks_native/libs/ui/Surface.cpp
Mathias Agopian cbb288bfe8 fix [2068105] implement queueBuffer/lockBuffer/dequeueBuffer properly 
Rewrote SurfaceFlinger's buffer management from the ground-up.
The design now support an arbitrary number of buffers per surface, however the current implementation is limited to four. Currently only 2 buffers are used in practice.

The main new feature is to be able to dequeue all buffers at once (very important when there are only two). 

A client can dequeue all buffers until there are none available, it can lock all buffers except the last one that is used for composition. The client will block then, until a new buffer is enqueued.

The current implementation requires that buffers are locked in the same order they are dequeued and enqueued in the same order they are locked. Only one buffer can be locked at a time.

eg. Allowed sequence:   DQ, DQ, LOCK, Q, LOCK, Q
eg. Forbidden sequence: DQ, DQ, LOCK, LOCK, Q, Q
2009-09-07 16:32:45 -07:00

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/*
* Copyright (C) 2007 The Android Open Source Project
*
* 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.
*/
#define LOG_TAG "Surface"
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include <utils/CallStack.h>
#include <binder/IPCThreadState.h>
#include <binder/IMemory.h>
#include <utils/Log.h>
#include <ui/DisplayInfo.h>
#include <ui/BufferMapper.h>
#include <ui/ISurface.h>
#include <ui/Surface.h>
#include <ui/SurfaceComposerClient.h>
#include <ui/Rect.h>
#include <pixelflinger/pixelflinger.h>
#include <private/ui/SharedBufferStack.h>
#include <private/ui/LayerState.h>
#include <private/ui/SurfaceBuffer.h>
namespace android {
// ----------------------------------------------------------------------
static status_t copyBlt(
const sp<SurfaceBuffer>& dst,
const sp<SurfaceBuffer>& src,
const Region& reg)
{
status_t err;
uint8_t const * src_bits = NULL;
err = src->lock(GRALLOC_USAGE_SW_READ_OFTEN, reg.bounds(), (void**)&src_bits);
LOGE_IF(err, "error locking src buffer %s", strerror(-err));
uint8_t* dst_bits = NULL;
err = dst->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, reg.bounds(), (void**)&dst_bits);
LOGE_IF(err, "error locking dst buffer %s", strerror(-err));
Region::const_iterator head(reg.begin());
Region::const_iterator tail(reg.end());
if (head != tail && src_bits && dst_bits) {
// NOTE: dst and src must be the same format
const size_t bpp = bytesPerPixel(src->format);
const size_t dbpr = dst->stride * bpp;
const size_t sbpr = src->stride * bpp;
while (head != tail) {
const Rect& r(*head++);
ssize_t h = r.height();
if (h <= 0) continue;
size_t size = r.width() * bpp;
uint8_t const * s = src_bits + (r.left + src->stride * r.top) * bpp;
uint8_t * d = dst_bits + (r.left + dst->stride * r.top) * bpp;
if (dbpr==sbpr && size==sbpr) {
size *= h;
h = 1;
}
do {
memcpy(d, s, size);
d += dbpr;
s += sbpr;
} while (--h > 0);
}
}
if (src_bits)
src->unlock();
if (dst_bits)
dst->unlock();
return err;
}
// ============================================================================
// SurfaceControl
// ============================================================================
SurfaceControl::SurfaceControl(
const sp<SurfaceComposerClient>& client,
const sp<ISurface>& surface,
const ISurfaceFlingerClient::surface_data_t& data,
uint32_t w, uint32_t h, PixelFormat format, uint32_t flags)
: mClient(client), mSurface(surface),
mToken(data.token), mIdentity(data.identity),
mWidth(data.width), mHeight(data.height), mFormat(data.format),
mFlags(flags)
{
}
SurfaceControl::~SurfaceControl()
{
destroy();
}
void SurfaceControl::destroy()
{
if (isValid()) {
mClient->destroySurface(mToken);
}
// clear all references and trigger an IPC now, to make sure things
// happen without delay, since these resources are quite heavy.
mClient.clear();
mSurface.clear();
IPCThreadState::self()->flushCommands();
}
void SurfaceControl::clear()
{
// here, the window manager tells us explicitly that we should destroy
// the surface's resource. Soon after this call, it will also release
// its last reference (which will call the dtor); however, it is possible
// that a client living in the same process still holds references which
// would delay the call to the dtor -- that is why we need this explicit
// "clear()" call.
destroy();
}
bool SurfaceControl::isSameSurface(
const sp<SurfaceControl>& lhs, const sp<SurfaceControl>& rhs)
{
if (lhs == 0 || rhs == 0)
return false;
return lhs->mSurface->asBinder() == rhs->mSurface->asBinder();
}
status_t SurfaceControl::setLayer(int32_t layer) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->setLayer(mToken, layer);
}
status_t SurfaceControl::setPosition(int32_t x, int32_t y) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->setPosition(mToken, x, y);
}
status_t SurfaceControl::setSize(uint32_t w, uint32_t h) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->setSize(mToken, w, h);
}
status_t SurfaceControl::hide() {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->hide(mToken);
}
status_t SurfaceControl::show(int32_t layer) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->show(mToken, layer);
}
status_t SurfaceControl::freeze() {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->freeze(mToken);
}
status_t SurfaceControl::unfreeze() {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->unfreeze(mToken);
}
status_t SurfaceControl::setFlags(uint32_t flags, uint32_t mask) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->setFlags(mToken, flags, mask);
}
status_t SurfaceControl::setTransparentRegionHint(const Region& transparent) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->setTransparentRegionHint(mToken, transparent);
}
status_t SurfaceControl::setAlpha(float alpha) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->setAlpha(mToken, alpha);
}
status_t SurfaceControl::setMatrix(float dsdx, float dtdx, float dsdy, float dtdy) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->setMatrix(mToken, dsdx, dtdx, dsdy, dtdy);
}
status_t SurfaceControl::setFreezeTint(uint32_t tint) {
const sp<SurfaceComposerClient>& client(mClient);
if (client == 0) return NO_INIT;
status_t err = validate(client->mControl);
if (err < 0) return err;
return client->setFreezeTint(mToken, tint);
}
status_t SurfaceControl::validate(SharedClient const* cblk) const
{
if (mToken<0 || mClient==0) {
LOGE("invalid token (%d, identity=%u) or client (%p)",
mToken, mIdentity, mClient.get());
return NO_INIT;
}
if (cblk == 0) {
LOGE("cblk is null (surface id=%d, identity=%u)", mToken, mIdentity);
return NO_INIT;
}
status_t err = cblk->validate(mToken);
if (err != NO_ERROR) {
LOGE("surface (id=%d, identity=%u) is invalid, err=%d (%s)",
mToken, mIdentity, err, strerror(-err));
return err;
}
uint32_t identity = cblk->getIdentity(mToken);
if (mIdentity != identity) {
LOGE("using an invalid surface id=%d, identity=%u should be %d",
mToken, mIdentity, identity);
return NO_INIT;
}
return NO_ERROR;
}
status_t SurfaceControl::writeSurfaceToParcel(
const sp<SurfaceControl>& control, Parcel* parcel)
{
uint32_t flags = 0;
uint32_t format = 0;
SurfaceID token = -1;
uint32_t identity = 0;
uint32_t width = 0;
uint32_t height = 0;
sp<SurfaceComposerClient> client;
sp<ISurface> sur;
if (SurfaceControl::isValid(control)) {
token = control->mToken;
identity = control->mIdentity;
client = control->mClient;
sur = control->mSurface;
width = control->mWidth;
height = control->mHeight;
format = control->mFormat;
flags = control->mFlags;
}
parcel->writeStrongBinder(client!=0 ? client->connection() : NULL);
parcel->writeStrongBinder(sur!=0 ? sur->asBinder() : NULL);
parcel->writeInt32(token);
parcel->writeInt32(identity);
parcel->writeInt32(width);
parcel->writeInt32(height);
parcel->writeInt32(format);
parcel->writeInt32(flags);
return NO_ERROR;
}
sp<Surface> SurfaceControl::getSurface() const
{
Mutex::Autolock _l(mLock);
if (mSurfaceData == 0) {
mSurfaceData = new Surface(const_cast<SurfaceControl*>(this));
}
return mSurfaceData;
}
// ============================================================================
// Surface
// ============================================================================
Surface::Surface(const sp<SurfaceControl>& surface)
: mClient(surface->mClient), mSurface(surface->mSurface),
mToken(surface->mToken), mIdentity(surface->mIdentity),
mFormat(surface->mFormat), mFlags(surface->mFlags),
mBufferMapper(BufferMapper::get()), mSharedBufferClient(NULL),
mWidth(surface->mWidth), mHeight(surface->mHeight)
{
mSharedBufferClient = new SharedBufferClient(
mClient->mControl, mToken, 2);
init();
}
Surface::Surface(const Parcel& parcel)
: mBufferMapper(BufferMapper::get()), mSharedBufferClient(NULL)
{
sp<IBinder> clientBinder = parcel.readStrongBinder();
mSurface = interface_cast<ISurface>(parcel.readStrongBinder());
mToken = parcel.readInt32();
mIdentity = parcel.readInt32();
mWidth = parcel.readInt32();
mHeight = parcel.readInt32();
mFormat = parcel.readInt32();
mFlags = parcel.readInt32();
// FIXME: what does that mean if clientBinder is NULL here?
if (clientBinder != NULL) {
mClient = SurfaceComposerClient::clientForConnection(clientBinder);
mSharedBufferClient = new SharedBufferClient(
mClient->mControl, mToken, 2);
}
init();
}
void Surface::init()
{
android_native_window_t::setSwapInterval = setSwapInterval;
android_native_window_t::dequeueBuffer = dequeueBuffer;
android_native_window_t::lockBuffer = lockBuffer;
android_native_window_t::queueBuffer = queueBuffer;
android_native_window_t::query = query;
android_native_window_t::perform = perform;
mSwapRectangle.makeInvalid();
DisplayInfo dinfo;
SurfaceComposerClient::getDisplayInfo(0, &dinfo);
const_cast<float&>(android_native_window_t::xdpi) = dinfo.xdpi;
const_cast<float&>(android_native_window_t::ydpi) = dinfo.ydpi;
// FIXME: set real values here
const_cast<int&>(android_native_window_t::minSwapInterval) = 1;
const_cast<int&>(android_native_window_t::maxSwapInterval) = 1;
const_cast<uint32_t&>(android_native_window_t::flags) = 0;
// be default we request a hardware surface
mUsage = GRALLOC_USAGE_HW_RENDER;
mUsageChanged = true;
mNeedFullUpdate = false;
}
Surface::~Surface()
{
// this is a client-side operation, the surface is destroyed, unmap
// its buffers in this process.
for (int i=0 ; i<2 ; i++) {
if (mBuffers[i] != 0 && mBuffers[i]->handle != 0) {
getBufferMapper().unregisterBuffer(mBuffers[i]->handle);
}
}
// clear all references and trigger an IPC now, to make sure things
// happen without delay, since these resources are quite heavy.
mClient.clear();
mSurface.clear();
delete mSharedBufferClient;
IPCThreadState::self()->flushCommands();
}
sp<SurfaceComposerClient> Surface::getClient() const {
return mClient;
}
sp<ISurface> Surface::getISurface() const {
return mSurface;
}
bool Surface::isValid() {
return mToken>=0 && mClient!=0;
}
status_t Surface::validate(SharedClient const* cblk) const
{
sp<SurfaceComposerClient> client(getClient());
if (mToken<0 || mClient==0) {
LOGE("invalid token (%d, identity=%u) or client (%p)",
mToken, mIdentity, client.get());
return NO_INIT;
}
if (cblk == 0) {
LOGE("cblk is null (surface id=%d, identity=%u)", mToken, mIdentity);
return NO_INIT;
}
status_t err = cblk->validate(mToken);
if (err != NO_ERROR) {
LOGE("surface (id=%d, identity=%u) is invalid, err=%d (%s)",
mToken, mIdentity, err, strerror(-err));
return err;
}
uint32_t identity = cblk->getIdentity(mToken);
if (mIdentity != identity) {
LOGE("using an invalid surface id=%d, identity=%u should be %d",
mToken, mIdentity, identity);
return NO_INIT;
}
return NO_ERROR;
}
bool Surface::isSameSurface(
const sp<Surface>& lhs, const sp<Surface>& rhs)
{
if (lhs == 0 || rhs == 0)
return false;
return lhs->mSurface->asBinder() == rhs->mSurface->asBinder();
}
// ----------------------------------------------------------------------------
int Surface::setSwapInterval(android_native_window_t* window, int interval) {
return 0;
}
int Surface::dequeueBuffer(android_native_window_t* window,
android_native_buffer_t** buffer) {
Surface* self = getSelf(window);
return self->dequeueBuffer(buffer);
}
int Surface::lockBuffer(android_native_window_t* window,
android_native_buffer_t* buffer) {
Surface* self = getSelf(window);
return self->lockBuffer(buffer);
}
int Surface::queueBuffer(android_native_window_t* window,
android_native_buffer_t* buffer) {
Surface* self = getSelf(window);
return self->queueBuffer(buffer);
}
int Surface::query(android_native_window_t* window,
int what, int* value) {
Surface* self = getSelf(window);
return self->query(what, value);
}
int Surface::perform(android_native_window_t* window,
int operation, ...) {
va_list args;
va_start(args, operation);
Surface* self = getSelf(window);
int res = self->perform(operation, args);
va_end(args);
return res;
}
// ----------------------------------------------------------------------------
status_t Surface::dequeueBuffer(sp<SurfaceBuffer>* buffer) {
android_native_buffer_t* out;
status_t err = dequeueBuffer(&out);
if (err == NO_ERROR) {
*buffer = SurfaceBuffer::getSelf(out);
}
return err;
}
// ----------------------------------------------------------------------------
int Surface::dequeueBuffer(android_native_buffer_t** buffer)
{
sp<SurfaceComposerClient> client(getClient());
status_t err = validate(client->mControl);
if (err != NO_ERROR)
return err;
ssize_t bufIdx = mSharedBufferClient->dequeue();
if (bufIdx < 0) {
LOGE("error dequeuing a buffer (%s)", strerror(bufIdx));
return bufIdx;
}
// FIXME: in case of failure below, we need to undo the dequeue
uint32_t usage;
const bool usageChanged = getUsage(&usage);
const sp<SurfaceBuffer>& backBuffer(mBuffers[bufIdx]);
if ((backBuffer == 0) || usageChanged ||
mSharedBufferClient->needNewBuffer(bufIdx)) {
err = getBufferLocked(bufIdx, usage);
LOGE_IF(err, "getBufferLocked(%ld, %08x) failed (%s)",
bufIdx, usage, strerror(-err));
if (err == NO_ERROR) {
// reset the width/height with the what we get from the buffer
mWidth = uint32_t(backBuffer->width);
mHeight = uint32_t(backBuffer->height);
}
}
// if we still don't have a buffer here, we probably ran out of memory
if (!err && backBuffer==0) {
err = NO_MEMORY;
}
if (err == NO_ERROR) {
mDirtyRegion.set(backBuffer->width, backBuffer->height);
*buffer = backBuffer.get();
} else {
mSharedBufferClient->undoDequeue(bufIdx);
}
return err;
}
int Surface::lockBuffer(android_native_buffer_t* buffer)
{
sp<SurfaceComposerClient> client(getClient());
status_t err = validate(client->mControl);
if (err != NO_ERROR)
return err;
int32_t bufIdx = SurfaceBuffer::getSelf(buffer)->getIndex();
err = mSharedBufferClient->lock(bufIdx);
LOGE_IF(err, "error locking buffer %d (%s)", bufIdx, strerror(-err));
return err;
}
int Surface::queueBuffer(android_native_buffer_t* buffer)
{
sp<SurfaceComposerClient> client(getClient());
status_t err = validate(client->mControl);
if (err != NO_ERROR)
return err;
if (mSwapRectangle.isValid()) {
mDirtyRegion.set(mSwapRectangle);
}
int32_t bufIdx = SurfaceBuffer::getSelf(buffer)->getIndex();
mSharedBufferClient->setDirtyRegion(bufIdx, mDirtyRegion);
err = mSharedBufferClient->queue(bufIdx);
LOGE_IF(err, "error queuing buffer %d (%s)", bufIdx, strerror(-err));
if (err == NO_ERROR) {
// FIXME: can we avoid this IPC if we know there is one pending?
client->signalServer();
}
return err;
}
int Surface::query(int what, int* value)
{
switch (what) {
case NATIVE_WINDOW_WIDTH:
*value = int(mWidth);
return NO_ERROR;
case NATIVE_WINDOW_HEIGHT:
*value = int(mHeight);
return NO_ERROR;
case NATIVE_WINDOW_FORMAT:
*value = int(mFormat);
return NO_ERROR;
}
return BAD_VALUE;
}
int Surface::perform(int operation, va_list args)
{
int res = NO_ERROR;
switch (operation) {
case NATIVE_WINDOW_SET_USAGE:
setUsage( va_arg(args, int) );
break;
default:
res = NAME_NOT_FOUND;
break;
}
return res;
}
void Surface::setUsage(uint32_t reqUsage)
{
Mutex::Autolock _l(mSurfaceLock);
if (mUsage != reqUsage) {
mUsageChanged = true;
mUsage = reqUsage;
}
}
bool Surface::getUsage(uint32_t* usage)
{
Mutex::Autolock _l(mSurfaceLock);
*usage = mUsage;
if (mUsageChanged) {
mUsageChanged = false;
return true;
}
return false;
}
// ----------------------------------------------------------------------------
status_t Surface::lock(SurfaceInfo* info, bool blocking) {
return Surface::lock(info, NULL, blocking);
}
status_t Surface::lock(SurfaceInfo* other, Region* dirtyIn, bool blocking)
{
if (mApiLock.tryLock() != NO_ERROR) {
LOGE("calling Surface::lock() from different threads!");
CallStack stack;
stack.update();
stack.dump("Surface::lock called from different threads");
return WOULD_BLOCK;
}
// we're intending to do software rendering from this point
setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
sp<SurfaceBuffer> backBuffer;
status_t err = dequeueBuffer(&backBuffer);
LOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
if (err == NO_ERROR) {
err = lockBuffer(backBuffer.get());
LOGE_IF(err, "lockBuffer (idx=%d) failed (%s)",
backBuffer->getIndex(), strerror(-err));
if (err == NO_ERROR) {
// we handle copy-back here...
const Rect bounds(backBuffer->width, backBuffer->height);
Region scratch(bounds);
Region& newDirtyRegion(dirtyIn ? *dirtyIn : scratch);
if (mNeedFullUpdate) {
// reset newDirtyRegion to bounds when a buffer is reallocated
// it would be better if this information was associated with
// the buffer and made available to outside of Surface.
// This will do for now though.
mNeedFullUpdate = false;
newDirtyRegion.set(bounds);
} else {
newDirtyRegion.andSelf(bounds);
}
const sp<SurfaceBuffer>& frontBuffer(mPostedBuffer);
if (frontBuffer !=0 &&
backBuffer->width == frontBuffer->width &&
backBuffer->height == frontBuffer->height &&
!(mFlags & ISurfaceComposer::eDestroyBackbuffer))
{
const Region copyback(mOldDirtyRegion.subtract(newDirtyRegion));
if (!copyback.isEmpty() && frontBuffer!=0) {
// copy front to back
copyBlt(backBuffer, frontBuffer, copyback);
}
}
mDirtyRegion = newDirtyRegion;
mOldDirtyRegion = newDirtyRegion;
void* vaddr;
status_t res = backBuffer->lock(
GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
newDirtyRegion.bounds(), &vaddr);
LOGW_IF(res, "failed locking buffer (handle = %p)",
backBuffer->handle);
mLockedBuffer = backBuffer;
other->w = backBuffer->width;
other->h = backBuffer->height;
other->s = backBuffer->stride;
other->usage = backBuffer->usage;
other->format = backBuffer->format;
other->bits = vaddr;
}
}
mApiLock.unlock();
return err;
}
status_t Surface::unlockAndPost()
{
if (mLockedBuffer == 0) {
LOGE("unlockAndPost failed, no locked buffer");
return BAD_VALUE;
}
status_t err = mLockedBuffer->unlock();
LOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
err = queueBuffer(mLockedBuffer.get());
LOGE_IF(err, "queueBuffer (idx=%d) failed (%s)",
mLockedBuffer->getIndex(), strerror(-err));
mPostedBuffer = mLockedBuffer;
mLockedBuffer = 0;
return err;
}
void Surface::setSwapRectangle(const Rect& r) {
Mutex::Autolock _l(mSurfaceLock);
mSwapRectangle = r;
}
status_t Surface::getBufferLocked(int index, int usage)
{
sp<ISurface> s(mSurface);
if (s == 0) return NO_INIT;
status_t err = NO_MEMORY;
// free the current buffer
sp<SurfaceBuffer>& currentBuffer(mBuffers[index]);
if (currentBuffer != 0) {
getBufferMapper().unregisterBuffer(currentBuffer->handle);
currentBuffer.clear();
}
sp<SurfaceBuffer> buffer = s->requestBuffer(index, usage);
LOGE_IF(buffer==0,
"ISurface::getBuffer(%d, %08x) returned NULL",
index, usage);
if (buffer != 0) { // this should never happen by construction
LOGE_IF(buffer->handle == NULL,
"requestBuffer(%d, %08x) returned a buffer with a null handle",
index, usage);
if (buffer->handle != NULL) {
err = getBufferMapper().registerBuffer(buffer->handle);
LOGW_IF(err, "registerBuffer(...) failed %d (%s)",
err, strerror(-err));
if (err == NO_ERROR) {
currentBuffer = buffer;
currentBuffer->setIndex(index);
mNeedFullUpdate = true;
}
}
}
return err;
}
}; // namespace android
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