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/*
* Copyright (C) 2015 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 "hwc-virtual-compositor-worker"
#include "virtualcompositorworker.h"
#include "worker.h"
#include <errno.h>
#include <stdlib.h>
#include <cutils/log.h>
#include <hardware/hardware.h>
#include <hardware/hwcomposer.h>
#include <sched.h>
#include <sw_sync.h>
#include <sync/sync.h>
namespace android {
static const int kMaxQueueDepth = 3;
static const int kAcquireWaitTimeoutMs = 3000;
VirtualCompositorWorker::VirtualCompositorWorker()
: Worker("virtual-compositor", HAL_PRIORITY_URGENT_DISPLAY),
timeline_fd_(-1),
timeline_(0),
timeline_current_(0) {
}
VirtualCompositorWorker::~VirtualCompositorWorker() {
if (timeline_fd_ >= 0) {
FinishComposition(timeline_);
close(timeline_fd_);
timeline_fd_ = -1;
}
}
int VirtualCompositorWorker::Init() {
int ret = sw_sync_timeline_create();
if (ret < 0) {
ALOGE("Failed to create sw sync timeline %d", ret);
return ret;
}
timeline_fd_ = ret;
return InitWorker();
}
void VirtualCompositorWorker::QueueComposite(hwc_display_contents_1_t *dc) {
std::unique_ptr<VirtualComposition> composition(new VirtualComposition);
composition->outbuf_acquire_fence.Set(dc->outbufAcquireFenceFd);
dc->outbufAcquireFenceFd = -1;
if (dc->retireFenceFd >= 0)
close(dc->retireFenceFd);
dc->retireFenceFd = CreateNextTimelineFence();
for (size_t i = 0; i < dc->numHwLayers; ++i) {
hwc_layer_1_t *layer = &dc->hwLayers[i];
if (layer->flags & HWC_SKIP_LAYER)
continue;
composition->layer_acquire_fences.emplace_back(layer->acquireFenceFd);
layer->acquireFenceFd = -1;
if (layer->releaseFenceFd >= 0)
close(layer->releaseFenceFd);
layer->releaseFenceFd = CreateNextTimelineFence();
}
composition->release_timeline = timeline_;
Lock();
while (composite_queue_.size() >= kMaxQueueDepth) {
Unlock();
sched_yield();
Lock();
}
composite_queue_.push(std::move(composition));
Unlock();
Signal();
}
void VirtualCompositorWorker::Routine() {
int wait_ret = 0;
Lock();
if (composite_queue_.empty()) {
wait_ret = WaitForSignalOrExitLocked();
}
std::unique_ptr<VirtualComposition> composition;
if (!composite_queue_.empty()) {
composition = std::move(composite_queue_.front());
composite_queue_.pop();
}
Unlock();
if (wait_ret == -EINTR) {
return;
} else if (wait_ret) {
ALOGE("Failed to wait for signal, %d", wait_ret);
return;
}
Compose(std::move(composition));
}
int VirtualCompositorWorker::CreateNextTimelineFence() {
++timeline_;
return sw_sync_fence_create(timeline_fd_, "drm_fence", timeline_);
}
int VirtualCompositorWorker::FinishComposition(int point) {
int timeline_increase = point - timeline_current_;
if (timeline_increase <= 0)
return 0;
int ret = sw_sync_timeline_inc(timeline_fd_, timeline_increase);
if (ret)
ALOGE("Failed to increment sync timeline %d", ret);
else
timeline_current_ = point;
return ret;
}
void VirtualCompositorWorker::Compose(
std::unique_ptr<VirtualComposition> composition) {
if (!composition.get())
return;
int ret;
int outbuf_acquire_fence = composition->outbuf_acquire_fence.get();
if (outbuf_acquire_fence >= 0) {
ret = sync_wait(outbuf_acquire_fence, kAcquireWaitTimeoutMs);
if (ret) {
ALOGE("Failed to wait for outbuf acquire %d/%d", outbuf_acquire_fence,
ret);
return;
}
composition->outbuf_acquire_fence.Close();
}
for (size_t i = 0; i < composition->layer_acquire_fences.size(); ++i) {
int layer_acquire_fence = composition->layer_acquire_fences[i].get();
if (layer_acquire_fence >= 0) {
ret = sync_wait(layer_acquire_fence, kAcquireWaitTimeoutMs);
if (ret) {
ALOGE("Failed to wait for layer acquire %d/%d", layer_acquire_fence,
ret);
return;
}
composition->layer_acquire_fences[i].Close();
}
}
FinishComposition(composition->release_timeline);
}
}
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