Add the SurfaceTexture C++ implementation.

This change adds the C++ implementation of SurfaceTexture and related
classes. The goal of this is for a SurfaceTexture to be passed to
camera service or Stagefright in place of a Surface to allow camera
preview or decoded video frames to be streamed to an OpenGL ES texture
that an application can use.

Change-Id: I55c83a7017f1ecb81c9c9e3252cbd118b914296c

1 files changed, 204 insertions, 0 deletions

diff --git a/libs/gui/ISurfaceTexture.cpp b/libs/gui/ISurfaceTexture.cpp
new file mode 100644
index 0000000000..90bca3ca4b
--- /dev/null
+++ b/libs/gui/ISurfaceTexture.cpp
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/Vector.h>
+#include <utils/Timers.h>
+
+#include <binder/Parcel.h>
+#include <binder/IInterface.h>
+
+#include <gui/ISurfaceTexture.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+enum {
+    REQUEST_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
+    SET_BUFFER_COUNT,
+    DEQUEUE_BUFFER,
+    QUEUE_BUFFER,
+    CANCEL_BUFFER,
+    SET_CROP,
+    SET_TRANSFORM,
+};
+
+
+class BpSurfaceTexture : public BpInterface<ISurfaceTexture>
+{
+public:
+    BpSurfaceTexture(const sp<IBinder>& impl)
+        : BpInterface<ISurfaceTexture>(impl)
+    {
+    }
+
+    virtual sp<GraphicBuffer> requestBuffer(int bufferIdx,
+            uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(bufferIdx);
+        data.writeInt32(w);
+        data.writeInt32(h);
+        data.writeInt32(format);
+        data.writeInt32(usage);
+        remote()->transact(REQUEST_BUFFER, data, &reply);
+        sp<GraphicBuffer> buffer;
+        bool nonNull = reply.readInt32();
+        if (nonNull) {
+            buffer = new GraphicBuffer();
+            reply.read(*buffer);
+        }
+        return buffer;
+    }
+
+    virtual status_t setBufferCount(int bufferCount)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(bufferCount);
+        remote()->transact(SET_BUFFER_COUNT, data, &reply);
+        status_t err = reply.readInt32();
+        return err;
+    }
+
+    virtual status_t dequeueBuffer(int *buf) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        remote()->transact(DEQUEUE_BUFFER, data, &reply);
+        *buf = reply.readInt32();
+        int result = reply.readInt32();
+        return result;
+    }
+
+    virtual status_t queueBuffer(int buf) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(buf);
+        remote()->transact(QUEUE_BUFFER, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+
+    virtual void cancelBuffer(int buf) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(buf);
+        remote()->transact(CANCEL_BUFFER, data, &reply);
+    }
+
+    virtual status_t setCrop(const Rect& reg) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeFloat(reg.left);
+        data.writeFloat(reg.top);
+        data.writeFloat(reg.right);
+        data.writeFloat(reg.bottom);
+        remote()->transact(SET_CROP, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+
+    virtual status_t setTransform(uint32_t transform) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(transform);
+        remote()->transact(SET_TRANSFORM, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+};
+
+IMPLEMENT_META_INTERFACE(SurfaceTexture, "android.gui.SurfaceTexture");
+
+// ----------------------------------------------------------------------
+
+status_t BnSurfaceTexture::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    switch(code) {
+        case REQUEST_BUFFER: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int bufferIdx   = data.readInt32();
+            uint32_t w      = data.readInt32();
+            uint32_t h      = data.readInt32();
+            uint32_t format = data.readInt32();
+            uint32_t usage  = data.readInt32();
+            sp<GraphicBuffer> buffer(requestBuffer(bufferIdx, w, h, format,
+                    usage));
+            reply->writeInt32(buffer != 0);
+            if (buffer != 0) {
+                reply->write(*buffer);
+            }
+            return NO_ERROR;
+        } break;
+        case SET_BUFFER_COUNT: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int bufferCount = data.readInt32();
+            int result = setBufferCount(bufferCount);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case DEQUEUE_BUFFER: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int buf;
+            int result = dequeueBuffer(&buf);
+            reply->writeInt32(buf);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case QUEUE_BUFFER: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int buf = data.readInt32();
+            status_t result = queueBuffer(buf);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case CANCEL_BUFFER: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int buf = data.readInt32();
+            cancelBuffer(buf);
+            return NO_ERROR;
+        } break;
+        case SET_CROP: {
+            Rect reg;
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            reg.left = data.readFloat();
+            reg.top = data.readFloat();
+            reg.right = data.readFloat();
+            reg.bottom = data.readFloat();
+            status_t result = setCrop(reg);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case SET_TRANSFORM: {
+            Rect reg;
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            uint32_t transform = data.readInt32();
+            status_t result = setTransform(transform);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+    }
+    return BBinder::onTransact(code, data, reply, flags);
+}
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android