Support streaming data across binder boundaries.

Change-Id: Ifbac61406dcb81343765f99ccba08bd90f9274cc

3 files changed, 207 insertions, 0 deletions

diff --git a/media/libmedia/Android.mk b/media/libmedia/Android.mk
index 2e5cbe3..731c09d 100644
--- a/media/libmedia/Android.mk
+++ b/media/libmedia/Android.mk
@@ -15,6 +15,7 @@ LOCAL_SRC_FILES:= \
     IMediaRecorderClient.cpp \
     IMediaPlayer.cpp \
     IMediaRecorder.cpp \
+    IStreamSource.cpp \
     Metadata.cpp \
     mediarecorder.cpp \
     IMediaMetadataRetriever.cpp \
diff --git a/media/libmedia/IMediaPlayerService.cpp b/media/libmedia/IMediaPlayerService.cpp
index 4abfa75..77199e1 100644
--- a/media/libmedia/IMediaPlayerService.cpp
+++ b/media/libmedia/IMediaPlayerService.cpp
@@ -23,6 +23,7 @@
 #include <media/IMediaPlayerService.h>
 #include <media/IMediaRecorder.h>
 #include <media/IOMX.h>
+#include <media/IStreamSource.h>
 
 #include <utils/Errors.h>  // for status_t
 
@@ -31,6 +32,7 @@ namespace android {
 enum {
     CREATE_URL = IBinder::FIRST_CALL_TRANSACTION,
     CREATE_FD,
+    CREATE_STREAM,
     DECODE_URL,
     DECODE_FD,
     CREATE_MEDIA_RECORDER,
@@ -107,6 +109,21 @@ public:
         return interface_cast<IMediaPlayer>(reply.readStrongBinder());;
     }
 
+    virtual sp<IMediaPlayer> create(
+            pid_t pid, const sp<IMediaPlayerClient> &client,
+            const sp<IStreamSource> &source, int audioSessionId) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
+        data.writeInt32(static_cast<int32_t>(pid));
+        data.writeStrongBinder(client->asBinder());
+        data.writeStrongBinder(source->asBinder());
+        data.writeInt32(static_cast<int32_t>(audioSessionId));
+
+        remote()->transact(CREATE_STREAM, data, &reply);
+
+        return interface_cast<IMediaPlayer>(reply.readStrongBinder());;
+    }
+
     virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
     {
         Parcel data, reply;
@@ -184,6 +201,27 @@ status_t BnMediaPlayerService::onTransact(
             reply->writeStrongBinder(player->asBinder());
             return NO_ERROR;
         } break;
+        case CREATE_STREAM:
+        {
+            CHECK_INTERFACE(IMediaPlayerService, data, reply);
+
+            pid_t pid = static_cast<pid_t>(data.readInt32());
+
+            sp<IMediaPlayerClient> client =
+                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
+
+            sp<IStreamSource> source =
+                interface_cast<IStreamSource>(data.readStrongBinder());
+
+            int audioSessionId = static_cast<int>(data.readInt32());
+
+            sp<IMediaPlayer> player =
+                create(pid, client, source, audioSessionId);
+
+            reply->writeStrongBinder(player->asBinder());
+            return OK;
+            break;
+        }
         case DECODE_URL: {
             CHECK_INTERFACE(IMediaPlayerService, data, reply);
             const char* url = data.readCString();
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