void BufferQueue::createBufferQueue(sp<IGraphicBufferProducer>* outProducer,
        sp<IGraphicBufferConsumer>* outConsumer,
        bool consumerIsSurfaceFlinger) {
    sp<BufferQueueCore> core(new BufferQueueCore());
    sp<IGraphicBufferProducer> producer(new BufferQueueProducer(core, consumerIsSurfaceFlinger));
    sp<IGraphicBufferConsumer> consumer(new BufferQueueConsumer(core));

    *outProducer = producer;
    *outConsumer = consumer;
}

• 静态函数 createBufferQueue() 中创建 BufferQueueCore、BufferQueueProducer 和 BufferQueueConsumer。

class BufferQueueProducer : public BnGraphicBufferProducer,
                            private IBinder::DeathRecipient {
    sp<BufferQueueCore> mCore;
}

class BufferQueueConsumer : public BnGraphicBufferConsumer {
    sp<BufferQueueCore> mCore;
}

• BufferQueueProducer 和 BufferQueueConsumer 都有成员 mCore，从 createBufferQueue() 可知它是在调用构造函数时传进来的。
• 2014 年把 BufferQueue 拆分成了 BufferQueueCore、BufferQueueProducer 和 BufferQueueConsumer。

commit 289ade165e60b5f71734d30e535f16eb1f4313ad
Author: Dan Stoza <[email protected]>
Date:   Fri Feb 28 11:17:17 2014 -0800

    Split BufferQueue into core + producer + consumer

    Change-Id: Idc39f1e511d68ce4f02202d35425a419bc0bcd92

 include/gui/BufferItem.h          | 103 +++++++++++++++++
 include/gui/BufferQueueConsumer.h | 148 ++++++++++++++++++++++++
 include/gui/BufferQueueCore.h     | 120 ++++++++++++++++++++
 include/gui/BufferQueueProducer.h | 165 +++++++++++++++++++++++++++
 include/gui/BufferSlot.h          | 136 ++++++++++++++++++++++
 libs/gui/Android.mk               |   5 +
 libs/gui/BufferItem.cpp           | 190 +++++++++++++++++++++++++++++++
 libs/gui/BufferQueueConsumer.cpp  | 398 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 libs/gui/BufferQueueCore.cpp      | 209 ++++++++++++++++++++++++++++++++++
 libs/gui/BufferQueueProducer.cpp  | 705 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 libs/gui/BufferSlot.cpp           |  15 +++
 11 files changed, 2194 insertions(+)