Enable camera preview to a SurfaceTexture. (fd6f39e1) · Commits · e / os / android_frameworks_base

api/current.xml

+13 −0

Original line number	Diff line number	Diff line
		@@ -90535,6 +90535,19 @@
		<exception name="IOException" type="java.io.IOException">
		</exception>
		</method>
		<method name="setPreviewTexture"
		return="void"
		abstract="false"
		native="true"
		synchronized="false"
		static="false"
		final="true"
		deprecated="not deprecated"
		visibility="public"
		>
		<parameter name="surfaceTexture" type="android.graphics.SurfaceTexture">
		</parameter>
		</method>
		<method name="setZoomChangeListener"
		return="void"
		abstract="false"

core/java/android/hardware/Camera.java

+28 −2

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ import android.util.Log;
		import android.view.Surface;
		import android.view.SurfaceHolder;
		import android.graphics.ImageFormat;
		import android.graphics.SurfaceTexture;
		import android.os.Handler;
		import android.os.Looper;
		import android.os.Message;
		@@ -324,8 +325,10 @@ public class Camera {

		/**
		* Sets the {@link Surface} to be used for live preview.
		* A surface is necessary for preview, and preview is necessary to take
		* pictures. The same surface can be re-set without harm.
		* Either a surface or surface texture is necessary for preview, and
		* preview is necessary to take pictures. The same surface can be re-set
		* without harm. Setting a preview surface will un-set any preview surface
		* texture that was set via {@link #setPreviewTexture}.
		*
		* <p>The {@link SurfaceHolder} must already contain a surface when this
		* method is called. If you are using {@link android.view.SurfaceView},
		@@ -356,6 +359,29 @@ public class Camera {

		private native final void setPreviewDisplay(Surface surface);

		/**
		* Sets the {@link SurfaceTexture} to be used for live preview.
		* Either a surface or surface texture is necessary for preview, and
		* preview is necessary to take pictures. The same surface texture can be
		* re-set without harm. Setting a preview surface texture will un-set any
		* preview surface that was set via {@link #setPreviewDisplay}.
		*
		* <p>This method must be called before {@link #startPreview()}. The
		* one exception is that if the preview surface texture is not set (or set
		* to null) before startPreview() is called, then this method may be called
		* once with a non-null parameter to set the preview surface. (This allows
		* camera setup and surface creation to happen in parallel, saving time.)
		* The preview surface texture may not otherwise change while preview is
		* running.
		*
		* @param surfaceTexture the {@link SurfaceTexture} to which the preview
		* images are to be sent or null to remove the current preview surface
		* texture
		* @throws IOException if the method fails (for example, if the surface
		* texture is unavailable or unsuitable).
		*/
		public native final void setPreviewTexture(SurfaceTexture surfaceTexture);

		/**
		* Callback interface used to deliver copies of preview frames as
		* they are displayed.

core/jni/android_hardware_Camera.cpp

+25 −1

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@

		#include <utils/Vector.h>

		#include <gui/SurfaceTexture.h>
		#include <surfaceflinger/Surface.h>
		#include <camera/Camera.h>
		#include <binder/IMemory.h>
		@@ -34,6 +35,7 @@ using namespace android;
		struct fields_t {
		jfieldID context;
		jfieldID surface;
		jfieldID surfaceTexture;
		jfieldID facing;
		jfieldID orientation;
		jmethodID post_event;
		@@ -393,6 +395,24 @@ static void android_hardware_Camera_setPreviewDisplay(JNIEnv *env, jobject thiz,
		}
		}

		static void android_hardware_Camera_setPreviewTexture(JNIEnv *env,
		jobject thiz, jobject jSurfaceTexture)
		{
		LOGV("setPreviewTexture");
		sp<Camera> camera = get_native_camera(env, thiz, NULL);
		if (camera == 0) return;

		sp<SurfaceTexture> surfaceTexture = NULL;
		if (jSurfaceTexture != NULL) {
		surfaceTexture = reinterpret_cast<SurfaceTexture*>(env->GetIntField(
		jSurfaceTexture, fields.surfaceTexture));
		}
		if (camera->setPreviewTexture(surfaceTexture) != NO_ERROR) {
		jniThrowException(env, "java/io/IOException",
		"setPreviewTexture failed");
		}
		}

		static void android_hardware_Camera_startPreview(JNIEnv *env, jobject thiz)
		{
		LOGV("startPreview");
		@@ -603,6 +623,9 @@ static JNINativeMethod camMethods[] = {
		{ "setPreviewDisplay",
		"(Landroid/view/Surface;)V",
		(void *)android_hardware_Camera_setPreviewDisplay },
		{ "setPreviewTexture",
		"(Landroid/graphics/SurfaceTexture;)V",
		(void *)android_hardware_Camera_setPreviewTexture },
		{ "startPreview",
		"()V",
		(void *)android_hardware_Camera_startPreview },
		@@ -688,6 +711,8 @@ int register_android_hardware_Camera(JNIEnv *env)
		field fields_to_find[] = {
		{ "android/hardware/Camera", "mNativeContext", "I", &fields.context },
		{ "android/view/Surface", ANDROID_VIEW_SURFACE_JNI_ID, "I", &fields.surface },
		{ "android/graphics/SurfaceTexture",
		ANDROID_GRAPHICS_SURFACETEXTURE_JNI_ID, "I", &fields.surfaceTexture },
		{ "android/hardware/Camera$CameraInfo", "facing", "I", &fields.facing },
		{ "android/hardware/Camera$CameraInfo", "orientation", "I", &fields.orientation },
		};
		@@ -708,4 +733,3 @@ int register_android_hardware_Camera(JNIEnv *env)
		return AndroidRuntime::registerNativeMethods(env, "android/hardware/Camera",
		camMethods, NELEM(camMethods));
		}