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-rwxr-xr-xvirtualcompositorworker.cpp181
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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));
+ SignalLocked();
+ Unlock();
+}
+
+void VirtualCompositorWorker::Routine() {
+ ALOGD_IF(log_level(DBG_INFO),"----------------------------VirtualCompositorWorker Routine start----------------------------");
+
+ int ret = Lock();
+ if (ret) {
+ ALOGE("Failed to lock worker, %d", ret);
+ return;
+ }
+
+ int wait_ret = 0;
+ 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();
+ }
+
+ ret = Unlock();
+ if (ret) {
+ ALOGE("Failed to unlock worker, %d", ret);
+ return;
+ }
+
+ if (wait_ret == -EINTR) {
+ return;
+ } else if (wait_ret) {
+ ALOGE("Failed to wait for signal, %d", wait_ret);
+ return;
+ }
+
+ Compose(std::move(composition));
+
+ ALOGD_IF(log_level(DBG_INFO),"----------------------------VirtualCompositorWorker Routine end----------------------------");
+}
+
+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);
+}
+}