CpuConsumer cannot simply assume a slot's buffer is the same buffer
between acquire and release, and therefore it could be possible for
the same slot to get used for a second acquired buffer, if there's a
producer disconnect in between. This would cause a problem when the
first buffer is released by the consumer.
Instead, use an independent list of acquired buffers to properly track
their state.
Bug: 8291751
Change-Id: I0241ad8704e53d47318c7179b13daed8181b1fab
This change moves some common fence handling code into the base class for
BufferQueue consumer classes. It also makes the ConsumerBase class initialize
a buffer slot's fence with the acquire fence every time a buffer is acquired.
Change-Id: I0bd88bc269e919653b659bfb3ebfb04dd61692a0
This change makes BufferQueue derive the min undequeued buffer count from a max
acquired buffer count that is set by the consumer. This value may be set at
any time that a producer is not connected to the BufferQueue rather than at
BufferQueue construction time.
Change-Id: Icf9f1d91ec612a079968ba0a4621deffe48f4e22
BufferItemConsumer allows for acquiring BufferQueue's BufferItems,
which contain all the data and metadata the BufferQueue has for a
given graphics buffer.
This consumer is useful when direct access to the native buffer_handles
is needed by the client.
Also includes a minor cleanup of CpuConsumer's use of 'virtual'.
Bug: 6243944
Change-Id: If7dc4192b15ac499555f1eda42a85140f2434795
After a HWC set, each SurfaceFlinger Layer retrieves the release fence
HWC returned and gives it to the layer's SurfaceTexture. The
SurfaceTexture accumulates the fences into a merged fence until the
next updateTexImage, then passes the merged fence to the BufferQueue
in releaseBuffer.
In a follow-on change, BufferQueue will return the fence along with
the buffer slot in dequeueBuffer. For now, dequeueBuffer waits for the
fence to signal before returning.
The releaseFence default value for BufferQueue::releaseBuffer() is
temporary to avoid transient build breaks with a multi-project
checkin. It'll disappear in the next change.
Change-Id: Iaa9a0d5775235585d9cbf453d3a64623d08013d9
Aimed for use cases where gralloc buffers need to be consumed by CPU
users, such as camera image data streams.
The CpuConsumer is a synchronous queue, which exposes raw pointers to
the underlying graphics buffers to applications. Multiple buffers may
be acquired at once, up to the limit set at time of construction.
Change-Id: If1d99f12471438e95a69696e40685948778055fd
