Camera: Add request settings override API (963325db) · Commits · e / os / android_frameworks_av

camera/ndk/impl/ACameraMetadata.cpp

+1 −0

Original line number	Diff line number	Diff line
		@@ -537,6 +537,7 @@ ACameraMetadata::isCaptureRequestTag(const uint32_t tag) {
		case ACAMERA_CONTROL_ENABLE_ZSL:
		case ACAMERA_CONTROL_EXTENDED_SCENE_MODE:
		case ACAMERA_CONTROL_ZOOM_RATIO:
		case ACAMERA_CONTROL_SETTINGS_OVERRIDE:
		case ACAMERA_EDGE_MODE:
		case ACAMERA_FLASH_MODE:
		case ACAMERA_HOT_PIXEL_MODE:

camera/ndk/include/camera/NdkCameraMetadataTags.h

+133 −0

Original line number	Diff line number	Diff line
		@@ -2044,6 +2044,105 @@ typedef enum acamera_metadata_tag {
		*/
		ACAMERA_CONTROL_ZOOM_RATIO = // float
		ACAMERA_CONTROL_START + 47,
		/**
		* <p>The desired CaptureRequest settings override with which certain keys are
		* applied earlier so that they can take effect sooner.</p>
		*
		* <p>Type: int32 (acamera_metadata_enum_android_control_settings_override_t)</p>
		*
		* <p>This tag may appear in:
		* <ul>
		* <li>ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks</li>
		* <li>ACaptureRequest</li>
		* </ul></p>
		*
		* <p>There are some CaptureRequest keys which can be applied earlier than others
		* when controls within a CaptureRequest aren't required to take effect at the same time.
		* One such example is zoom. Zoom can be applied at a later stage of the camera pipeline.
		* As soon as the camera device receives the CaptureRequest, it can apply the requested
		* zoom value onto an earlier request that's already in the pipeline, thus improves zoom
		* latency.</p>
		* <p>This key's value in the capture result reflects whether the controls for this capture
		* are overridden "by" a newer request. This means that if a capture request turns on
		* settings override, the capture result of an earlier request will contain the key value
		* of ZOOM. On the other hand, if a capture request has settings override turned on,
		* but all newer requests have it turned off, the key's value in the capture result will
		* be OFF because this capture isn't overridden by a newer capture. In the two examples
		* below, the capture results columns illustrate the settingsOverride values in different
		* scenarios.</p>
		* <p>Assuming the zoom settings override can speed up by 1 frame, below example illustrates
		* the speed-up at the start of capture session:</p>
		* <pre><code>Camera session created
		* Request 1 (zoom=1.0x, override=ZOOM) ->
		* Request 2 (zoom=1.2x, override=ZOOM) ->
		* Request 3 (zoom=1.4x, override=ZOOM) -> Result 1 (zoom=1.2x, override=ZOOM)
		* Request 4 (zoom=1.6x, override=ZOOM) -> Result 2 (zoom=1.4x, override=ZOOM)
		* Request 5 (zoom=1.8x, override=ZOOM) -> Result 3 (zoom=1.6x, override=ZOOM)
		* -> Result 4 (zoom=1.8x, override=ZOOM)
		* -> Result 5 (zoom=1.8x, override=OFF)
		* </code></pre>
		* <p>The application can turn on settings override and use zoom as normal. The example
		* shows that the later zoom values (1.2x, 1.4x, 1.6x, and 1.8x) overwrite the zoom
		* values (1.0x, 1.2x, 1.4x, and 1.8x) of earlier requests (#1, #2, #3, and #4).</p>
		* <p>The application must make sure the settings override doesn't interfere with user
		* journeys requiring simultaneous application of all controls in CaptureRequest on the
		* requested output targets. For example, if the application takes a still capture using
		* CameraCaptureSession#capture, and the repeating request immediately sets a different
		* zoom value using override, the inflight still capture could have its zoom value
		* overwritten unexpectedly.</p>
		* <p>So the application is strongly recommended to turn off settingsOverride when taking
		* still/burst captures, and turn it back on when there is only repeating viewfinder
		* request and no inflight still/burst captures.</p>
		* <p>Below is the example demonstrating the transitions in and out of the
		* settings override:</p>
		* <pre><code>Request 1 (zoom=1.0x, override=OFF)
		* Request 2 (zoom=1.2x, override=OFF)
		* Request 3 (zoom=1.4x, override=ZOOM) -> Result 1 (zoom=1.0x, override=OFF)
		* Request 4 (zoom=1.6x, override=ZOOM) -> Result 2 (zoom=1.4x, override=ZOOM)
		* Request 5 (zoom=1.8x, override=OFF) -> Result 3 (zoom=1.6x, override=ZOOM)
		* -> Result 4 (zoom=1.6x, override=OFF)
		* -> Result 5 (zoom=1.8x, override=OFF)
		* </code></pre>
		* <p>This example shows that:</p>
		* <ul>
		* <li>The application "ramps in" settings override by setting the control to ZOOM.
		* In the example, request #3 enables zoom settings override. Because the camera device
		* can speed up applying zoom by 1 frame, the outputs of request #2 has 1.4x zoom, the
		* value specified in request #3.</li>
		* <li>The application "ramps out" of settings override by setting the control to OFF. In
		* the example, request #5 changes the override to OFF. Because request #4's zoom
		* takes effect in result #3, result #4's zoom remains the same until new value takes
		* effect in result #5.</li>
		* </ul>
		*/
		ACAMERA_CONTROL_SETTINGS_OVERRIDE = // int32 (acamera_metadata_enum_android_control_settings_override_t)
		ACAMERA_CONTROL_START + 49,
		/**
		* <p>List of available settings overrides supported by the camera device that can
		* be used to speed up certain controls.</p>
		*
		* <p>Type: int32[n]</p>
		*
		* <p>This tag may appear in:
		* <ul>
		* <li>ACameraMetadata from ACameraManager_getCameraCharacteristics</li>
		* </ul></p>
		*
		* <p>When not all controls within a CaptureRequest are required to take effect
		* at the same time on the outputs, the camera device may apply certain request keys sooner
		* to improve latency. This list contains such supported settings overrides. Each settings
		* override corresponds to a set of CaptureRequest keys that can be sped up when applying.</p>
		* <p>A supported settings override can be passed in via
		* <a href="https://developer.android.com/reference/android/hardware/camera2/CaptureRequest.html#CONTROL_SETTINGS_OVERRIDE">CaptureRequest#CONTROL_SETTINGS_OVERRIDE</a>, and the
		* CaptureRequest keys corresponding to the override are applied as soon as possible, not
		* bound by per-frame synchronization. See ACAMERA_CONTROL_SETTINGS_OVERRIDE for the
		* CaptureRequest keys for each override.</p>
		* <p>OFF is always included in this list.</p>
		*
		* @see ACAMERA_CONTROL_SETTINGS_OVERRIDE
		*/
		ACAMERA_CONTROL_AVAILABLE_SETTINGS_OVERRIDES = // int32[n]
		ACAMERA_CONTROL_START + 50,
		ACAMERA_CONTROL_END,

		/**
		@@ -8495,6 +8594,40 @@ typedef enum acamera_metadata_enum_acamera_control_extended_scene_mode {

		} acamera_metadata_enum_android_control_extended_scene_mode_t;

		// ACAMERA_CONTROL_SETTINGS_OVERRIDE
		typedef enum acamera_metadata_enum_acamera_control_settings_override {
		/**
		* <p>No keys are applied sooner than the other keys when applying CaptureRequest
		* settings to the camera device. This is the default value.</p>
		*/
		ACAMERA_CONTROL_SETTINGS_OVERRIDE_OFF = 0,

		/**
		* <p>Zoom related keys are applied sooner than the other keys in the CaptureRequest. The
		* zoom related keys are:</p>
		* <ul>
		* <li>ACAMERA_CONTROL_ZOOM_RATIO</li>
		* <li>ACAMERA_SCALER_CROP_REGION</li>
		* <li>ACAMERA_CONTROL_AE_REGIONS</li>
		* <li>ACAMERA_CONTROL_AWB_REGIONS</li>
		* <li>ACAMERA_CONTROL_AF_REGIONS</li>
		* </ul>
		* <p>Even though ACAMERA_CONTROL_AE_REGIONS, ACAMERA_CONTROL_AWB_REGIONS,
		* and ACAMERA_CONTROL_AF_REGIONS are not directly zoom related, applications
		* typically scale these regions together with ACAMERA_SCALER_CROP_REGION to have a
		* consistent mapping within the current field of view. In this aspect, they are
		* related to ACAMERA_SCALER_CROP_REGION and ACAMERA_CONTROL_ZOOM_RATIO.</p>
		*
		* @see ACAMERA_CONTROL_AE_REGIONS
		* @see ACAMERA_CONTROL_AF_REGIONS
		* @see ACAMERA_CONTROL_AWB_REGIONS
		* @see ACAMERA_CONTROL_ZOOM_RATIO
		* @see ACAMERA_SCALER_CROP_REGION
		*/
		ACAMERA_CONTROL_SETTINGS_OVERRIDE_ZOOM = 1,

		} acamera_metadata_enum_android_control_settings_override_t;



		// ACAMERA_EDGE_MODE

services/camera/libcameraservice/hidl/VndkVersionMetadataTags.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -74,6 +74,7 @@ std::map<int, std::vector<camera_metadata_tag>> static_api_level_to_keys{
		ANDROID_SCALER_AVAILABLE_STREAM_USE_CASES,
		} },
		{34, {
		ANDROID_CONTROL_AVAILABLE_SETTINGS_OVERRIDES,
		ANDROID_REQUEST_AVAILABLE_COLOR_SPACE_PROFILES_MAP,
		} },
		};
		@@ -92,4 +93,7 @@ std::map<int, std::vector<camera_metadata_tag>> dynamic_api_level_to_keys{
		ANDROID_SENSOR_PIXEL_MODE,
		ANDROID_SENSOR_RAW_BINNING_FACTOR_USED,
		} },
		{34, {
		ANDROID_CONTROL_SETTINGS_OVERRIDE,
		} },
		};