import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.hardware.camera2.utils.SurfaceUtils;
+import android.hardware.HardwareBuffer;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
* </p>
* <p>
* If the application already has an Image from {@link ImageReader}, the
- * application can directly queue this Image into ImageWriter (via
- * {@link #queueInputImage}), potentially with zero buffer copies. For the
- * {@link ImageFormat#PRIVATE PRIVATE} format Images produced by
- * {@link ImageReader}, this is the only way to send Image data to ImageWriter,
- * as the Image data aren't accessible by the application.
+ * application can directly queue this Image into the ImageWriter (via
+ * {@link #queueInputImage}), potentially with zero buffer copies. This
+ * even works if the image format of the ImageWriter is
+ * {@link ImageFormat#PRIVATE PRIVATE}, and prior to Android P is the only
+ * way to enqueue images into such an ImageWriter. Starting in Android P
+ * private images may also be accessed through their hardware buffers
+ * (when available) through the {@link Image#getHardwareBuffer()} method.
+ * Attempting to access the planes of a private image, will return an
+ * empty array.
* </p>
+ * <p>
* Once new input Images are queued into an ImageWriter, it's up to the
* downstream components (e.g. {@link ImageReader} or
* {@link android.hardware.camera2.CameraDevice}) to consume the Images. If the
* <p>
* If the format of ImageWriter is {@link ImageFormat#PRIVATE PRIVATE} (
* {@link ImageWriter#getFormat()} == {@link ImageFormat#PRIVATE}), the
- * image buffer is inaccessible to the application, and calling this method
- * will result in an {@link IllegalStateException}. Instead, the application
- * should acquire images from some other component (e.g. an
+ * image buffer is accessible to the application only through the hardware
+ * buffer obtained through {@link Image#getHardwareBuffer()}. (On Android
+ * versions prior to P, dequeueing private buffers will cause an
+ * {@link IllegalStateException} to be thrown). Alternatively,
+ * the application can acquire images from some other component (e.g. an
* {@link ImageReader}), and queue them directly to this ImageWriter via the
* {@link ImageWriter#queueInputImage queueInputImage()} method.
* </p>
*
* @return The next available input Image from this ImageWriter.
* @throws IllegalStateException if {@code maxImages} Images are currently
- * dequeued, or the ImageWriter format is
- * {@link ImageFormat#PRIVATE PRIVATE}, or the input
- * {@link android.view.Surface Surface} has been abandoned by the
- * consumer component that provided the {@link android.view.Surface Surface}.
+ * dequeued, or the input {@link android.view.Surface Surface}
+ * has been abandoned by the consumer component that provided
+ * the {@link android.view.Surface Surface}. Prior to Android
+ * P, throws if the ImageWriter format is
+ * {@link ImageFormat#PRIVATE PRIVATE}.
* @see #queueInputImage
* @see Image#close
*/
public Image dequeueInputImage() {
- if (mWriterFormat == ImageFormat.PRIVATE) {
- throw new IllegalStateException(
- "PRIVATE format ImageWriter doesn't support this operation since the images are"
- + " inaccessible to the application!");
- }
-
if (mDequeuedImages.size() >= mMaxImages) {
throw new IllegalStateException("Already dequeued max number of Images " + mMaxImages);
}
}
@Override
+ public HardwareBuffer getHardwareBuffer() {
+ throwISEIfImageIsInvalid();
+
+ return nativeGetHardwareBuffer();
+ }
+
+ @Override
public Plane[] getPlanes() {
throwISEIfImageIsInvalid();
private synchronized native int nativeGetHeight();
private synchronized native int nativeGetFormat();
+
+ private synchronized native HardwareBuffer nativeGetHardwareBuffer();
}
// Native implemented ImageWriter methods.
#include <gui/Surface.h>
#include <android_runtime/AndroidRuntime.h>
#include <android_runtime/android_view_Surface.h>
+#include <android_runtime/android_hardware_HardwareBuffer.h>
+#include <private/android/AHardwareBufferHelpers.h>
#include <jni.h>
#include <nativehelper/JNIHelp.h>
#include <stdint.h>
#include <inttypes.h>
+#include <android/hardware_buffer_jni.h>
#define IMAGE_BUFFER_JNI_ID "mNativeBuffer"
#define IMAGE_FORMAT_UNKNOWN 0 // This is the same value as ImageFormat#UNKNOWN.
return static_cast<jint>(publicFmt);
}
+static jobject Image_getHardwareBuffer(JNIEnv* env, jobject thiz) {
+ GraphicBuffer* buffer;
+ Image_getNativeContext(env, thiz, &buffer, NULL);
+ if (buffer == NULL) {
+ jniThrowException(env, "java/lang/IllegalStateException",
+ "Image is not initialized");
+ return NULL;
+ }
+ AHardwareBuffer* b = AHardwareBuffer_from_GraphicBuffer(buffer);
+ // don't user the public AHardwareBuffer_toHardwareBuffer() because this would force us
+ // to link against libandroid.so
+ return android_hardware_HardwareBuffer_createFromAHardwareBuffer(env, b);
+}
+
static void Image_setFenceFd(JNIEnv* env, jobject thiz, int fenceFd) {
ALOGV("%s:", __FUNCTION__);
env->SetIntField(thiz, gSurfaceImageClassInfo.mNativeFenceFd, reinterpret_cast<jint>(fenceFd));
static JNINativeMethod gImageMethods[] = {
{"nativeCreatePlanes", "(II)[Landroid/media/ImageWriter$WriterSurfaceImage$SurfacePlane;",
- (void*)Image_createSurfacePlanes },
- {"nativeGetWidth", "()I", (void*)Image_getWidth },
- {"nativeGetHeight", "()I", (void*)Image_getHeight },
- {"nativeGetFormat", "()I", (void*)Image_getFormat },
+ (void*)Image_createSurfacePlanes },
+ {"nativeGetWidth", "()I", (void*)Image_getWidth },
+ {"nativeGetHeight", "()I", (void*)Image_getHeight },
+ {"nativeGetFormat", "()I", (void*)Image_getFormat },
+ {"nativeGetHardwareBuffer", "()Landroid/hardware/HardwareBuffer;",
+ (void*)Image_getHardwareBuffer },
};
int register_android_media_ImageWriter(JNIEnv *env) {
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