Support streaming data across binder boundaries.
Change-Id: Ifbac61406dcb81343765f99ccba08bd90f9274cc
diff --git a/media/libmedia/IStreamSource.cpp b/media/libmedia/IStreamSource.cpp
new file mode 100644
index 0000000..89f2b44
--- /dev/null
+++ b/media/libmedia/IStreamSource.cpp
@@ -0,0 +1,168 @@
+/*
+ * 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "IStreamSource"
+#include <utils/Log.h>
+
+#include <media/IStreamSource.h>
+
+#include <binder/IMemory.h>
+#include <binder/Parcel.h>
+
+namespace android {
+
+enum {
+ // IStreamSource
+ SET_LISTENER = IBinder::FIRST_CALL_TRANSACTION,
+ SET_BUFFERS,
+ ON_BUFFER_AVAILABLE,
+
+ // IStreamListener
+ QUEUE_BUFFER,
+ QUEUE_COMMAND,
+};
+
+struct BpStreamSource : public BpInterface<IStreamSource> {
+ BpStreamSource(const sp<IBinder> &impl)
+ : BpInterface<IStreamSource>(impl) {
+ }
+
+ virtual void setListener(const sp<IStreamListener> &listener) {
+ Parcel data, reply;
+ data.writeInterfaceToken(IStreamSource::getInterfaceDescriptor());
+ data.writeStrongBinder(listener->asBinder());
+ remote()->transact(SET_LISTENER, data, &reply);
+ }
+
+ virtual void setBuffers(const Vector<sp<IMemory> > &buffers) {
+ Parcel data, reply;
+ data.writeInterfaceToken(IStreamSource::getInterfaceDescriptor());
+ data.writeInt32(static_cast<int32_t>(buffers.size()));
+ for (size_t i = 0; i < buffers.size(); ++i) {
+ data.writeStrongBinder(buffers.itemAt(i)->asBinder());
+ }
+ remote()->transact(SET_BUFFERS, data, &reply);
+ }
+
+ virtual void onBufferAvailable(size_t index) {
+ Parcel data, reply;
+ data.writeInterfaceToken(IStreamSource::getInterfaceDescriptor());
+ data.writeInt32(static_cast<int32_t>(index));
+ remote()->transact(
+ ON_BUFFER_AVAILABLE, data, &reply, IBinder::FLAG_ONEWAY);
+ }
+};
+
+IMPLEMENT_META_INTERFACE(StreamSource, "android.hardware.IStreamSource");
+
+status_t BnStreamSource::onTransact(
+ uint32_t code, const Parcel &data, Parcel *reply, uint32_t flags) {
+ switch (code) {
+ case SET_LISTENER:
+ {
+ CHECK_INTERFACE(IStreamSource, data, reply);
+ setListener(
+ interface_cast<IStreamListener>(data.readStrongBinder()));
+ break;
+ }
+
+ case SET_BUFFERS:
+ {
+ CHECK_INTERFACE(IStreamSource, data, reply);
+ size_t n = static_cast<size_t>(data.readInt32());
+ Vector<sp<IMemory> > buffers;
+ for (size_t i = 0; i < n; ++i) {
+ sp<IMemory> mem =
+ interface_cast<IMemory>(data.readStrongBinder());
+
+ buffers.push(mem);
+ }
+ setBuffers(buffers);
+ break;
+ }
+
+ case ON_BUFFER_AVAILABLE:
+ {
+ CHECK_INTERFACE(IStreamSource, data, reply);
+ onBufferAvailable(static_cast<size_t>(data.readInt32()));
+ break;
+ }
+
+ default:
+ return BBinder::onTransact(code, data, reply, flags);
+ }
+
+ return OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+struct BpStreamListener : public BpInterface<IStreamListener> {
+ BpStreamListener(const sp<IBinder> &impl)
+ : BpInterface<IStreamListener>(impl) {
+ }
+
+ virtual void queueBuffer(size_t index, size_t size) {
+ Parcel data, reply;
+ data.writeInterfaceToken(IStreamListener::getInterfaceDescriptor());
+ data.writeInt32(static_cast<int32_t>(index));
+ data.writeInt32(static_cast<int32_t>(size));
+
+ remote()->transact(QUEUE_BUFFER, data, &reply, IBinder::FLAG_ONEWAY);
+ }
+
+ virtual void queueCommand(Command cmd) {
+ Parcel data, reply;
+ data.writeInterfaceToken(IStreamListener::getInterfaceDescriptor());
+ data.writeInt32(static_cast<int32_t>(cmd));
+
+ remote()->transact(QUEUE_COMMAND, data, &reply, IBinder::FLAG_ONEWAY);
+ }
+};
+
+IMPLEMENT_META_INTERFACE(StreamListener, "android.hardware.IStreamListener");
+
+status_t BnStreamListener::onTransact(
+ uint32_t code, const Parcel &data, Parcel *reply, uint32_t flags) {
+ switch (code) {
+ case QUEUE_BUFFER:
+ {
+ CHECK_INTERFACE(IStreamListener, data, reply);
+ size_t index = static_cast<size_t>(data.readInt32());
+ size_t size = static_cast<size_t>(data.readInt32());
+
+ queueBuffer(index, size);
+ break;
+ }
+
+ case QUEUE_COMMAND:
+ {
+ CHECK_INTERFACE(IStreamListener, data, reply);
+ Command cmd = static_cast<Command>(data.readInt32());
+
+ queueCommand(cmd);
+ break;
+ }
+
+ default:
+ return BBinder::onTransact(code, data, reply, flags);
+ }
+
+ return OK;
+}
+
+} // namespace android