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/*
* Copyright (C) 2021 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.
*/
package android.hardware.media.c2@1.2;
/**
* Surface(BufferQueue/IGBP) synchronization object regarding # of dequeued
* output buffers. This keeps # of dequeued buffers from Surface less than
* configured max # of dequeued buffers all the time.
*/
struct SurfaceSyncObj {
/**
* ASharedMemory for synchronization data. Layout is below
*
* |lock(futex) 4bytes|
* |conditional_variable(futex) 4bytes|
* |# of max dequeable buffer 4bytes|
* |# of dequeued buffer 4bytes|
* |Status of the surface 4bytes|
* INIT = 0, Configuring surface is not finished.
* ACTIVE = 1, Surface is ready to allocate(dequeue).
* SWITCHING = 2, Switching to the new surface. It is blocked
* to allocate(dequeue) a buffer until switching
* completes.
*/
handle syncMemory;
// Read-only.
// The values which are tied and not changed with respect to Surface
// which is currently set up.
/** BufferQueue id. */
uint64_t bqId;
/** Generation id. */
uint32_t generationId;
/** Consumer usage flags. See +ndk
* libnativewindow#AHardwareBuffer_UsageFlags for possible values.
*/
uint64_t consumerUsage;
};
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