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am b42cb352: Merge "Camera: clarify largest JPEG dimension expectation" into mnc-dev

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* commit 'b42cb352a350bac198470f65125aa151ecacff13':
  Camera: clarify largest JPEG dimension expectation
This commit is contained in:
Yin-Chia Yeh
2015-07-14 23:13:27 +00:00
committed by Android Git Automerger
parent fc4acfd93c b42cb352a3
commit 9d513cec7c
1 changed files with 18 additions and 2 deletions
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20
core/java/android/hardware/camera2/CameraCharacteristics.java
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@@ -1901,7 +1901,7 @@ public final class CameraCharacteristics extends CameraMetadata<CameraCharacteri
* <tbody>
* <tr>
* <td align="center">{@link android.graphics.ImageFormat#JPEG }</td>
* <td align="center">{@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}</td>
* <td align="center">{@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize} (*1)</td>
* <td align="center">Any</td>
* <td align="center"></td>
* </tr>
@@ -1913,7 +1913,7 @@ public final class CameraCharacteristics extends CameraMetadata<CameraCharacteri
* </tr>
* <tr>
* <td align="center">{@link android.graphics.ImageFormat#JPEG }</td>
* <td align="center">1280x720 (720)</td>
* <td align="center">1280x720 (720p)</td>
* <td align="center">Any</td>
* <td align="center">if 720p &lt;= activeArraySize</td>
* </tr>
@@ -1951,6 +1951,22 @@ public final class CameraCharacteristics extends CameraMetadata<CameraCharacteri
* </table>
* <p>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.</p>
* <p>*1: For JPEG format, the sizes may be restricted by below conditions:</p>
* <ul>
* <li>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.</li>
* <li>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.</li>
* </ul>
* <p>This key is available on all devices.</p>
*
* @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL