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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 //#define LOG_NDEBUG 0
     18 #define LOG_TAG "BufferItemConsumer"
     19 //#define ATRACE_TAG ATRACE_TAG_GRAPHICS
     20 #include <utils/Log.h>
     21 
     22 #include <inttypes.h>
     23 
     24 #include <gui/BufferItem.h>
     25 #include <gui/BufferItemConsumer.h>
     26 
     27 #define BI_LOGV(x, ...) ALOGV("[%s] " x, mName.string(), ##__VA_ARGS__)
     28 //#define BI_LOGD(x, ...) ALOGD("[%s] " x, mName.string(), ##__VA_ARGS__)
     29 //#define BI_LOGI(x, ...) ALOGI("[%s] " x, mName.string(), ##__VA_ARGS__)
     30 //#define BI_LOGW(x, ...) ALOGW("[%s] " x, mName.string(), ##__VA_ARGS__)
     31 #define BI_LOGE(x, ...) ALOGE("[%s] " x, mName.string(), ##__VA_ARGS__)
     32 
     33 namespace android {
     34 
     35 BufferItemConsumer::BufferItemConsumer(
     36         const sp<IGraphicBufferConsumer>& consumer, uint64_t consumerUsage,
     37         int bufferCount, bool controlledByApp) :
     38     ConsumerBase(consumer, controlledByApp)
     39 {
     40     status_t err = mConsumer->setConsumerUsageBits(consumerUsage);
     41     LOG_ALWAYS_FATAL_IF(err != OK,
     42             "Failed to set consumer usage bits to %#" PRIx64, consumerUsage);
     43     if (bufferCount != DEFAULT_MAX_BUFFERS) {
     44         err = mConsumer->setMaxAcquiredBufferCount(bufferCount);
     45         LOG_ALWAYS_FATAL_IF(err != OK,
     46                 "Failed to set max acquired buffer count to %d", bufferCount);
     47     }
     48 }
     49 
     50 BufferItemConsumer::~BufferItemConsumer() {}
     51 
     52 void BufferItemConsumer::setBufferFreedListener(
     53         const wp<BufferFreedListener>& listener) {
     54     Mutex::Autolock _l(mMutex);
     55     mBufferFreedListener = listener;
     56 }
     57 
     58 status_t BufferItemConsumer::acquireBuffer(BufferItem *item,
     59         nsecs_t presentWhen, bool waitForFence) {
     60     status_t err;
     61 
     62     if (!item) return BAD_VALUE;
     63 
     64     Mutex::Autolock _l(mMutex);
     65 
     66     err = acquireBufferLocked(item, presentWhen);
     67     if (err != OK) {
     68         if (err != NO_BUFFER_AVAILABLE) {
     69             BI_LOGE("Error acquiring buffer: %s (%d)", strerror(err), err);
     70         }
     71         return err;
     72     }
     73 
     74     if (waitForFence) {
     75         err = item->mFence->waitForever("BufferItemConsumer::acquireBuffer");
     76         if (err != OK) {
     77             BI_LOGE("Failed to wait for fence of acquired buffer: %s (%d)",
     78                     strerror(-err), err);
     79             return err;
     80         }
     81     }
     82 
     83     item->mGraphicBuffer = mSlots[item->mSlot].mGraphicBuffer;
     84 
     85     return OK;
     86 }
     87 
     88 status_t BufferItemConsumer::releaseBuffer(const BufferItem &item,
     89         const sp<Fence>& releaseFence) {
     90     status_t err;
     91 
     92     Mutex::Autolock _l(mMutex);
     93 
     94     err = addReleaseFenceLocked(item.mSlot, item.mGraphicBuffer, releaseFence);
     95     if (err != OK) {
     96         BI_LOGE("Failed to addReleaseFenceLocked");
     97     }
     98 
     99     err = releaseBufferLocked(item.mSlot, item.mGraphicBuffer, EGL_NO_DISPLAY,
    100             EGL_NO_SYNC_KHR);
    101     if (err != OK && err != IGraphicBufferConsumer::STALE_BUFFER_SLOT) {
    102         BI_LOGE("Failed to release buffer: %s (%d)",
    103                 strerror(-err), err);
    104     }
    105     return err;
    106 }
    107 
    108 void BufferItemConsumer::freeBufferLocked(int slotIndex) {
    109     sp<BufferFreedListener> listener = mBufferFreedListener.promote();
    110     if (listener != nullptr && mSlots[slotIndex].mGraphicBuffer != nullptr) {
    111         // Fire callback if we have a listener registered and the buffer being freed is valid.
    112         BI_LOGV("actually calling onBufferFreed");
    113         listener->onBufferFreed(mSlots[slotIndex].mGraphicBuffer);
    114     }
    115     ConsumerBase::freeBufferLocked(slotIndex);
    116 }
    117 
    118 } // namespace android
    119