From 56830465493379a4941bed60d5745fbf3ed75320 Mon Sep 17 00:00:00 2001 From: Yin-Chia Yeh Date: Wed, 8 Jul 2015 14:26:05 -0700 Subject: Camera: clarify largest JPEG dimension expectation Codegen doc update. Bug: 22295208 Change-Id: I06f17579915bfaa640a26a42f0ce0b7549e35d3c --- .../hardware/camera2/CameraCharacteristics.java | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) (limited to 'core/java/android/hardware') diff --git a/core/java/android/hardware/camera2/CameraCharacteristics.java b/core/java/android/hardware/camera2/CameraCharacteristics.java index 4f9055b..84a4cbc 100644 --- a/core/java/android/hardware/camera2/CameraCharacteristics.java +++ b/core/java/android/hardware/camera2/CameraCharacteristics.java @@ -1883,7 +1883,7 @@ public final class CameraCharacteristics extends CameraMetadata * * {@link android.graphics.ImageFormat#JPEG } - * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize} + * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize} (*1) * Any * * @@ -1895,7 +1895,7 @@ public final class CameraCharacteristics extends CameraMetadata * * {@link android.graphics.ImageFormat#JPEG } - * 1280x720 (720) + * 1280x720 (720p) * Any * if 720p <= activeArraySize * @@ -1933,6 +1933,22 @@ public final class CameraCharacteristics extends CameraMetadata *

Refer to {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} and {@link android.hardware.camera2.CameraDevice#createCaptureSession } for additional mandatory * stream configurations on a per-capability basis.

+ *

*1: For JPEG format, the sizes may be restricted by below conditions:

+ *
    + *
  • The HAL may choose the aspect ratio of each Jpeg size to be one of well known ones + * (e.g. 4:3, 16:9, 3:2 etc.). If the sensor maximum resolution + * (defined by {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}) has an aspect ratio other than these, + * it does not have to be included in the supported JPEG sizes.
    • + *
  • Some hardware JPEG encoders may have pixel boundary alignment requirements, such as + * the dimensions being a multiple of 16. + * Therefore, the maximum JPEG size may be smaller than sensor maximum resolution. + * However, the largest JPEG size will be as close as possible to the sensor maximum + * resolution given above constraints. It is required that after aspect ratio adjustments, + * additional size reduction due to other issues must be less than 3% in area. For example, + * if the sensor maximum resolution is 3280x2464, if the maximum JPEG size has aspect + * ratio 4:3, and the JPEG encoder alignment requirement is 16, the maximum JPEG size will be + * 3264x2448.
    • + *
*

This key is available on all devices.

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL -- cgit v1.1