stagefright: rework media codec list and infos

This is in preparation of serving the codec list and codec infos
from the mediaserver

Bug: 11990470
Change-Id: Ib8e2708679c9ce461a4ba179974a740cdcdf2731

1 files changed, 163 insertions, 0 deletions

diff --git a/media/libmedia/IMediaCodecList.cpp b/media/libmedia/IMediaCodecList.cpp
new file mode 100644
index 0000000..bf7c5ca
--- /dev/null
+++ b/media/libmedia/IMediaCodecList.cpp
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2014, 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 <binder/Parcel.h>
+#include <media/stagefright/MediaCodecList.h>
+#include <media/IMediaCodecList.h>
+#include <media/MediaCodecInfo.h>
+
+#include <utils/Errors.h>  // for status_t
+
+namespace android {
+
+enum {
+    CREATE = IBinder::FIRST_CALL_TRANSACTION,
+    COUNT_CODECS,
+    GET_CODEC_INFO,
+    FIND_CODEC_BY_TYPE,
+    FIND_CODEC_BY_NAME,
+};
+
+class BpMediaCodecList: public BpInterface<IMediaCodecList>
+{
+public:
+    BpMediaCodecList(const sp<IBinder>& impl)
+        : BpInterface<IMediaCodecList>(impl)
+    {
+    }
+
+    virtual size_t countCodecs() const
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IMediaCodecList::getInterfaceDescriptor());
+        remote()->transact(COUNT_CODECS, data, &reply);
+        return static_cast<size_t>(reply.readInt32());
+    }
+
+    virtual sp<MediaCodecInfo> getCodecInfo(size_t index) const
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IMediaCodecList::getInterfaceDescriptor());
+        data.writeInt32(index);
+        remote()->transact(GET_CODEC_INFO, data, &reply);
+        status_t err = reply.readInt32();
+        if (err == OK) {
+            return MediaCodecInfo::FromParcel(reply);
+        } else {
+            return NULL;
+        }
+    }
+
+    virtual ssize_t findCodecByType(
+            const char *type, bool encoder, size_t startIndex = 0) const
+    {
+        if (startIndex > INT32_MAX) {
+            return NAME_NOT_FOUND;
+        }
+
+        Parcel data, reply;
+        data.writeInterfaceToken(IMediaCodecList::getInterfaceDescriptor());
+        data.writeCString(type);
+        data.writeInt32(encoder);
+        data.writeInt32(startIndex);
+        remote()->transact(FIND_CODEC_BY_TYPE, data, &reply);
+        return static_cast<ssize_t>(reply.readInt32());
+    }
+
+    virtual ssize_t findCodecByName(const char *name) const
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IMediaCodecList::getInterfaceDescriptor());
+        data.writeCString(name);
+        remote()->transact(FIND_CODEC_BY_NAME, data, &reply);
+        return static_cast<ssize_t>(reply.readInt32());
+    }
+};
+
+IMPLEMENT_META_INTERFACE(MediaCodecList, "android.media.IMediaCodecList");
+
+// ----------------------------------------------------------------------
+
+status_t BnMediaCodecList::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    switch (code) {
+        case COUNT_CODECS:
+        {
+            CHECK_INTERFACE(IMediaCodecList, data, reply);
+            size_t count = countCodecs();
+            if (count > INT32_MAX) {
+                count = INT32_MAX;
+            }
+            reply->writeInt32(count);
+            return NO_ERROR;
+        }
+        break;
+
+        case GET_CODEC_INFO:
+        {
+            CHECK_INTERFACE(IMediaCodecList, data, reply);
+            size_t index = static_cast<size_t>(data.readInt32());
+            const sp<MediaCodecInfo> info = getCodecInfo(index);
+            if (info != NULL) {
+                reply->writeInt32(OK);
+                info->writeToParcel(reply);
+            } else {
+                reply->writeInt32(-ERANGE);
+            }
+            return NO_ERROR;
+        }
+        break;
+
+        case FIND_CODEC_BY_TYPE:
+        {
+            CHECK_INTERFACE(IMediaCodecList, data, reply);
+            const char *type = data.readCString();
+            bool isEncoder = static_cast<bool>(data.readInt32());
+            size_t startIndex = static_cast<size_t>(data.readInt32());
+            ssize_t index = findCodecByType(type, isEncoder, startIndex);
+            if (index > INT32_MAX || index < 0) {
+                index = NAME_NOT_FOUND;
+            }
+            reply->writeInt32(index);
+            return NO_ERROR;
+        }
+        break;
+
+        case FIND_CODEC_BY_NAME:
+        {
+            CHECK_INTERFACE(IMediaCodecList, data, reply);
+            const char *name = data.readCString();
+            ssize_t index = findCodecByName(name);
+            if (index > INT32_MAX || index < 0) {
+                index = NAME_NOT_FOUND;
+            }
+            reply->writeInt32(index);
+            return NO_ERROR;
+        }
+        break;
+
+        default:
+            return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android