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135 lines
4.5 KiB
135 lines
4.5 KiB
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_DRM_PLATFORM_H_
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#define ANDROID_DRM_PLATFORM_H_
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#include <hardware/hardware.h>
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#include <hardware/hwcomposer.h>
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#include <map>
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#include <vector>
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#include "compositor/DrmDisplayComposition.h"
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#include "drmhwcomposer.h"
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namespace android {
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class DrmDevice;
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class Planner {
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public:
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class PlanStage {
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public:
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virtual ~PlanStage() {
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}
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virtual int ProvisionPlanes(std::vector<DrmCompositionPlane> *composition,
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std::map<size_t, DrmHwcLayer *> &layers,
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DrmCrtc *crtc,
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std::vector<DrmPlane *> *planes) = 0;
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protected:
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// Removes and returns the next available plane from planes
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static DrmPlane *PopPlane(std::vector<DrmPlane *> *planes) {
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if (planes->empty())
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return NULL;
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DrmPlane *plane = planes->front();
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planes->erase(planes->begin());
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return plane;
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}
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static int ValidatePlane(DrmPlane *plane, DrmHwcLayer *layer);
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// Inserts the given layer:plane in the composition at the back
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static int Emplace(std::vector<DrmCompositionPlane> *composition,
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std::vector<DrmPlane *> *planes,
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DrmCompositionPlane::Type type, DrmCrtc *crtc,
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std::pair<size_t, DrmHwcLayer *> layer) {
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DrmPlane *plane = PopPlane(planes);
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std::vector<DrmPlane *> unused_planes;
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int ret = -ENOENT;
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while (plane) {
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ret = ValidatePlane(plane, layer.second);
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if (!ret)
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break;
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if (!plane->zpos_property().is_immutable())
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unused_planes.push_back(plane);
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plane = PopPlane(planes);
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}
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if (!ret) {
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composition->emplace_back(type, plane, crtc, layer.first);
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planes->insert(planes->begin(), unused_planes.begin(),
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unused_planes.end());
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}
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return ret;
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}
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};
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// Creates a planner instance with platform-specific planning stages
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static std::unique_ptr<Planner> CreateInstance(DrmDevice *drm);
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// Takes a stack of layers and provisions hardware planes for them. If the
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// entire stack can't fit in hardware, FIXME
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//
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// @layers: a map of index:layer of layers to composite
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// @primary_planes: a vector of primary planes available for this frame
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// @overlay_planes: a vector of overlay planes available for this frame
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//
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// Returns: A tuple with the status of the operation (0 for success) and
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// a vector of the resulting plan (ie: layer->plane mapping).
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std::tuple<int, std::vector<DrmCompositionPlane>> ProvisionPlanes(
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std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
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std::vector<DrmPlane *> *primary_planes,
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std::vector<DrmPlane *> *overlay_planes);
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template <typename T, typename... A>
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void AddStage(A &&... args) {
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stages_.emplace_back(
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std::unique_ptr<PlanStage>(new T(std::forward(args)...)));
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}
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private:
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std::vector<DrmPlane *> GetUsablePlanes(
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DrmCrtc *crtc, std::vector<DrmPlane *> *primary_planes,
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std::vector<DrmPlane *> *overlay_planes);
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std::vector<std::unique_ptr<PlanStage>> stages_;
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};
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// This plan stage extracts all protected layers and places them on dedicated
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// planes.
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class PlanStageProtected : public Planner::PlanStage {
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public:
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int ProvisionPlanes(std::vector<DrmCompositionPlane> *composition,
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std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
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std::vector<DrmPlane *> *planes);
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};
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// This plan stage places as many layers on dedicated planes as possible (first
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// come first serve), and then sticks the rest in a precomposition plane (if
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// needed).
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class PlanStageGreedy : public Planner::PlanStage {
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public:
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int ProvisionPlanes(std::vector<DrmCompositionPlane> *composition,
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std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
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std::vector<DrmPlane *> *planes);
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};
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} // namespace android
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#endif
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