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Camera: Document limitation on private reprocessing

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For private reprocessing, the ImageReader used to produce images into
the ImageWriter isn't aware of the overridden format. If the HAL decides
to override the input IMPLEMENTATION_DEFINED format, reprocessing will
fail.

Document this limitation in the HAL interface.

Test: Build
Bug: 266954992
Change-Id: I9bd05e9682e4d11870bf9bd25763f28291faef75
This commit is contained in:
Shuzhen Wang 2023-02-09 00:22:23 +00:00
parent fbefc762b9
commit 80e67aedf2
3 changed files with 12 additions and 5 deletions
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11
camera/device/3.2/types.hal
View file

@ -346,15 +346,18 @@ struct HalStream {
* An override pixel format for the buffers in this stream.
*
* The HAL must respect the requested format in Stream unless it is
* IMPLEMENTATION_DEFINED, in which case the override format here must be
* used by the client instead, for this stream. This allows cross-platform
* HALs to use a standard format since IMPLEMENTATION_DEFINED formats often
* require device-specific information. In all other cases, the
* IMPLEMENTATION_DEFINED output, in which case the override format
* here must be used by the client instead, for this stream. This allows
* cross-platform HALs to use a standard format since IMPLEMENTATION_DEFINED
* formats often require device-specific information. In all other cases, the
* overrideFormat must match the requested format.
*
* When HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED is used, then the platform
* gralloc module must select a format based on the usage flags provided by
* the camera device and the other endpoint of the stream.
*
* For private reprocessing, the HAL must not override the input stream's
* IMPLEMENTATION_DEFINED format.
*/
android.hardware.graphics.common@1.0::PixelFormat overrideFormat;

5
camera/device/aidl/android/hardware/camera/device/HalStream.aidl
View file

@ -38,7 +38,7 @@ parcelable HalStream {
* An override pixel format for the buffers in this stream.
*
* The HAL must respect the requested format in Stream unless it is
* IMPLEMENTATION_DEFINED, in which case the override format here must be
* IMPLEMENTATION_DEFINED output, in which case the override format here must be
* used by the client instead, for this stream. This allows cross-platform
* HALs to use a standard format since IMPLEMENTATION_DEFINED formats often
* require device-specific information. In all other cases, the
@ -47,6 +47,9 @@ parcelable HalStream {
* When HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED is used, then the platform
* gralloc module must select a format based on the usage flags provided by
* the camera device and the other endpoint of the stream.
*
* For private reprocessing, the HAL must not override the input stream's
* IMPLEMENTATION_DEFINED format.
*/
android.hardware.graphics.common.PixelFormat overrideFormat;

1
current.txt
View file

@ -934,5 +934,6 @@ b7ce2d87841585551b082fca6d099622e63b7099e0d8013f687ea1a1dc35c4dc android.hardwar
42abd285a4293dadb8c89bc63b90cae2872fbffe90c4517aa3ea4965e8aecff7 android.hardware.graphics.common@1.2::types
4f1a02d21a22104c734f71cdbba19b6f7e93d4ee107ff79f0dbdd171a8430e0e android.hardware.automotive.vehicle@2.0::types
a2fbd9747fbb9ceb8c1090b5a24138312246502d5af0654a8c2b603a9bf521fc android.hardware.gnss@1.0::IGnssCallback
889b59e3e7a59afa67bf19882a44f51a2f9e43b6556ec52baa9ec3efd1ef7fbe android.hardware.camera.device@3.2::types
# There will be no more HIDL HALs. Use AIDL instead.