Fix issue 2667797: [Audio Effect Framework] new base class and binder interfaces for effect control.
Added IEffect and IEffectClient binder interfaces to exchange effect module control
and status information between application and media server processes.
Change-Id: I10e8e894898e52ed9956a765d0ef7075eb2593af
diff --git a/media/libmedia/IEffect.cpp b/media/libmedia/IEffect.cpp
new file mode 100644
index 0000000..8e3ac71
--- /dev/null
+++ b/media/libmedia/IEffect.cpp
@@ -0,0 +1,191 @@
+/*
+**
+** Copyright 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 "IEffect"
+#include <utils/Log.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <binder/Parcel.h>
+#include <media/IEffect.h>
+
+namespace android {
+
+enum {
+ ENABLE = IBinder::FIRST_CALL_TRANSACTION,
+ DISABLE,
+ COMMAND,
+ DISCONNECT,
+ GET_CBLK
+};
+
+class BpEffect: public BpInterface<IEffect>
+{
+public:
+ BpEffect(const sp<IBinder>& impl)
+ : BpInterface<IEffect>(impl)
+ {
+ }
+
+ status_t enable()
+ {
+ LOGV("enable");
+ Parcel data, reply;
+ data.writeInterfaceToken(IEffect::getInterfaceDescriptor());
+ remote()->transact(ENABLE, data, &reply);
+ return reply.readInt32();
+ }
+
+ status_t disable()
+ {
+ LOGV("disable");
+ Parcel data, reply;
+ data.writeInterfaceToken(IEffect::getInterfaceDescriptor());
+ remote()->transact(DISABLE, data, &reply);
+ return reply.readInt32();
+ }
+
+ status_t command(int cmdCode, int cmdSize, void *pCmdData, int *pReplySize, void *pReplyData)
+ {
+ LOGV("command");
+ Parcel data, reply;
+ data.writeInterfaceToken(IEffect::getInterfaceDescriptor());
+ data.writeInt32(cmdCode);
+ int size = cmdSize;
+ if (pCmdData == NULL) {
+ size = 0;
+ }
+ data.writeInt32(size);
+ if (size) {
+ data.write(pCmdData, size);
+ }
+ if (pReplySize == NULL) {
+ size = 0;
+ } else {
+ size = *pReplySize;
+ }
+ data.writeInt32(size);
+ remote()->transact(COMMAND, data, &reply);
+ status_t status = reply.readInt32();
+ size = reply.readInt32();
+ if (size != 0 && pReplyData != NULL && pReplySize != NULL) {
+ reply.read(pReplyData, size);
+ *pReplySize = size;
+ }
+ return status;
+ }
+
+ void disconnect()
+ {
+ LOGV("disconnect");
+ Parcel data, reply;
+ data.writeInterfaceToken(IEffect::getInterfaceDescriptor());
+ remote()->transact(DISCONNECT, data, &reply);
+ return;
+ }
+
+ virtual sp<IMemory> getCblk() const
+ {
+ Parcel data, reply;
+ sp<IMemory> cblk;
+ data.writeInterfaceToken(IEffect::getInterfaceDescriptor());
+ status_t status = remote()->transact(GET_CBLK, data, &reply);
+ if (status == NO_ERROR) {
+ cblk = interface_cast<IMemory>(reply.readStrongBinder());
+ }
+ return cblk;
+ }
+ };
+
+IMPLEMENT_META_INTERFACE(Effect, "android.media.IEffect");
+
+// ----------------------------------------------------------------------
+
+status_t BnEffect::onTransact(
+ uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+ switch(code) {
+ case ENABLE: {
+ LOGV("ENABLE");
+ CHECK_INTERFACE(IEffect, data, reply);
+ reply->writeInt32(enable());
+ return NO_ERROR;
+ } break;
+
+ case DISABLE: {
+ LOGV("DISABLE");
+ CHECK_INTERFACE(IEffect, data, reply);
+ reply->writeInt32(disable());
+ return NO_ERROR;
+ } break;
+
+ case COMMAND: {
+ LOGV("COMMAND");
+ CHECK_INTERFACE(IEffect, data, reply);
+ int cmdCode = data.readInt32();
+ int cmdSize = data.readInt32();
+ char *cmd = NULL;
+ if (cmdSize) {
+ cmd = (char *)malloc(cmdSize);
+ data.read(cmd, cmdSize);
+ }
+ int replySize = data.readInt32();
+ int replySz = replySize;
+ char *resp = NULL;
+ if (replySize) {
+ resp = (char *)malloc(replySize);
+ }
+ status_t status = command(cmdCode, cmdSize, cmd, &replySz, resp);
+ reply->writeInt32(status);
+ if (replySz < replySize) {
+ replySize = replySz;
+ }
+ reply->writeInt32(replySize);
+ if (replySize) {
+ reply->write(resp, replySize);
+ }
+ if (cmd) {
+ free(cmd);
+ }
+ if (resp) {
+ free(resp);
+ }
+ return NO_ERROR;
+ } break;
+
+ case DISCONNECT: {
+ LOGV("DISCONNECT");
+ CHECK_INTERFACE(IEffect, data, reply);
+ disconnect();
+ return NO_ERROR;
+ } break;
+
+ case GET_CBLK: {
+ CHECK_INTERFACE(IEffect, data, reply);
+ reply->writeStrongBinder(getCblk()->asBinder());
+ return NO_ERROR;
+ } break;
+
+ default:
+ return BBinder::onTransact(code, data, reply, flags);
+ }
+}
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+