1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/omx-plugin/include/ics/utils/Flattenable.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,62 @@
1.4 +/*
1.5 + * Copyright (C) 2010 The Android Open Source Project
1.6 + *
1.7 + * Licensed under the Apache License, Version 2.0 (the "License");
1.8 + * you may not use this file except in compliance with the License.
1.9 + * You may obtain a copy of the License at
1.10 + *
1.11 + * http://www.apache.org/licenses/LICENSE-2.0
1.12 + *
1.13 + * Unless required by applicable law or agreed to in writing, software
1.14 + * distributed under the License is distributed on an "AS IS" BASIS,
1.15 + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1.16 + * See the License for the specific language governing permissions and
1.17 + * limitations under the License.
1.18 + */
1.19 +
1.20 +#ifndef ANDROID_UTILS_FLATTENABLE_H
1.21 +#define ANDROID_UTILS_FLATTENABLE_H
1.22 +
1.23 +
1.24 +#include <stdint.h>
1.25 +#include <sys/types.h>
1.26 +#include <utils/Errors.h>
1.27 +
1.28 +namespace android {
1.29 +
1.30 +class Flattenable
1.31 +{
1.32 +public:
1.33 + // size in bytes of the flattened object
1.34 + virtual size_t getFlattenedSize() const = 0;
1.35 +
1.36 + // number of file descriptors to flatten
1.37 + virtual size_t getFdCount() const = 0;
1.38 +
1.39 + // flattens the object into buffer.
1.40 + // size should be at least of getFlattenedSize()
1.41 + // file descriptors are written in the fds[] array but ownership is
1.42 + // not transfered (ie: they must be dupped by the caller of
1.43 + // flatten() if needed).
1.44 + virtual status_t flatten(void* buffer, size_t size,
1.45 + int fds[], size_t count) const = 0;
1.46 +
1.47 + // unflattens the object from buffer.
1.48 + // size should be equal to the value of getFlattenedSize() when the
1.49 + // object was flattened.
1.50 + // unflattened file descriptors are found in the fds[] array and
1.51 + // don't need to be dupped(). ie: the caller of unflatten doesn't
1.52 + // keep ownership. If a fd is not retained by unflatten() it must be
1.53 + // explicitly closed.
1.54 + virtual status_t unflatten(void const* buffer, size_t size,
1.55 + int fds[], size_t count) = 0;
1.56 +
1.57 +protected:
1.58 + virtual ~Flattenable() = 0;
1.59 +
1.60 +};
1.61 +
1.62 +}; // namespace android
1.63 +
1.64 +
1.65 +#endif /* ANDROID_UTILS_FLATTENABLE_H */
