omx/1.0/Conversion.h

/*
 * Copyright 2016, 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.
 */

#ifndef ANDROID_HARDWARE_MEDIA_OMX_V1_0_UTILS_CONVERSION_H
#define ANDROID_HARDWARE_MEDIA_OMX_V1_0_UTILS_CONVERSION_H

#include <vector>
#include <list>

#include <cinttypes>
#include <unistd.h>

#include <hidl/MQDescriptor.h>
#include <hidl/Status.h>

#include <binder/Binder.h>
#include <binder/Status.h>
#include <ui/FenceTime.h>
#include <cutils/native_handle.h>

#include <ui/BufferQueueDefs.h>
#include <ui/GraphicBuffer.h>
#include <media/OMXFenceParcelable.h>
#include <media/OMXBuffer.h>
#include <media/hardware/VideoAPI.h>
#include <media/stagefright/MediaErrors.h>

#include <android/hardware/media/omx/1.0/types.h>
#include <android/hardware/media/omx/1.0/IOmx.h>
#include <android/hardware/media/omx/1.0/IOmxNode.h>
#include <android/hardware/media/omx/1.0/IOmxBufferSource.h>
#include <android/hardware/media/omx/1.0/IOmxObserver.h>
#include <android/hardware/media/omx/1.0/IGraphicBufferSource.h>

#include <android/IOMXBufferSource.h>

namespace android {
namespace hardware {
namespace media {
namespace omx {
namespace V1_0 {
namespace utils {

using ::android::hardware::hidl_array;
using ::android::hardware::hidl_string;
using ::android::hardware::hidl_vec;
using ::android::hardware::hidl_handle;
using ::android::hardware::Return;
using ::android::hardware::Void;
using ::android::sp;

using ::android::String8;
using ::android::OMXFenceParcelable;

using ::android::hardware::media::omx::V1_0::Message;
using ::android::omx_message;

using ::android::hardware::media::omx::V1_0::ColorAspects;
using ::android::hardware::media::V1_0::Rect;
using ::android::hardware::media::V1_0::Region;

using ::android::hardware::graphics::common::V1_0::Dataspace;

using ::android::hardware::graphics::common::V1_0::PixelFormat;

using ::android::OMXBuffer;

using ::android::hardware::media::V1_0::AnwBuffer;
using ::android::GraphicBuffer;

using ::android::hardware::media::omx::V1_0::IOmx;
using ::android::IOMX;

using ::android::hardware::media::omx::V1_0::IOmxNode;
using ::android::IOMXNode;

using ::android::hardware::media::omx::V1_0::IOmxObserver;
using ::android::IOMXObserver;

using ::android::hardware::media::omx::V1_0::IOmxBufferSource;
using ::android::IOMXBufferSource;

// native_handle_t helper functions.

/**
 * \brief Take an fd and create a native handle containing only the given fd.
 * The created handle will need to be deleted manually with
 * `native_handle_delete()`.
 *
 * \param[in] fd The source file descriptor (of type `int`).
 * \return The create `native_handle_t*` that contains the given \p fd. If the
 * supplied \p fd is negative, the created native handle will contain no file
 * descriptors.
 *
 * If the native handle cannot be created, the return value will be
 * `nullptr`.
 *
 * This function does not duplicate the file descriptor.
 */
inline native_handle_t* native_handle_create_from_fd(int fd) {
    if (fd < 0) {
        return native_handle_create(0, 0);
    }
    native_handle_t* nh = native_handle_create(1, 0);
    if (nh == nullptr) {
        return nullptr;
    }
    nh->data[0] = fd;
    return nh;
}

/**
 * \brief Extract a file descriptor from a native handle.
 *
 * \param[in] nh The source `native_handle_t*`.
 * \param[in] index The index of the file descriptor in \p nh to read from. This
 * input has the default value of `0`.
 * \return The `index`-th file descriptor in \p nh. If \p nh does not have
 * enough file descriptors, the returned value will be `-1`.
 *
 * This function does not duplicate the file descriptor.
 */
inline int native_handle_read_fd(native_handle_t const* nh, int index = 0) {
    return ((nh == nullptr) || (nh->numFds == 0) ||
            (nh->numFds <= index) || (index < 0)) ?
            -1 : nh->data[index];
}

/**
 * Conversion functions
 * ====================
 *
 * There are two main directions of conversion:
 * - `inTargetType(...)`: Create a wrapper whose lifetime depends on the
 *   input. The wrapper has type `TargetType`.
 * - `toTargetType(...)`: Create a standalone object of type `TargetType` that
 *   corresponds to the input. The lifetime of the output does not depend on the
 *   lifetime of the input.
 * - `wrapIn(TargetType*, ...)`: Same as `inTargetType()`, but for `TargetType`
 *   that cannot be copied and/or moved efficiently, or when there are multiple
 *   output arguments.
 * - `convertTo(TargetType*, ...)`: Same as `toTargetType()`, but for
 *   `TargetType` that cannot be copied and/or moved efficiently, or when there
 *   are multiple output arguments.
 *
 * `wrapIn()` and `convertTo()` functions will take output arguments before
 * input arguments. Some of these functions might return a value to indicate
 * success or error.
 *
 * In converting or wrapping something as a Treble type that contains a
 * `hidl_handle`, `native_handle_t*` will need to be created and returned as
 * an additional output argument, hence only `wrapIn()` or `convertTo()` would
 * be available. The caller must call `native_handle_delete()` to deallocate the
 * returned native handle when it is no longer needed.
 *
 * For types that contain file descriptors, `inTargetType()` and `wrapAs()` do
 * not perform duplication of file descriptors, while `toTargetType()` and
 * `convertTo()` do.
 */

/**
 * \brief Convert `Return<void>` to `binder::Status`.
 *
 * \param[in] t The source `Return<void>`.
 * \return The corresponding `binder::Status`.
 */
// convert: Return<void> -> ::android::binder::Status
inline ::android::binder::Status toBinderStatus(
        Return<void> const& t) {
    return ::android::binder::Status::fromExceptionCode(
            t.isOk() ? OK : UNKNOWN_ERROR,
            t.description().c_str());
}

/**
 * \brief Convert `Return<Status>` to `binder::Status`.
 *
 * \param[in] t The source `Return<Status>`.
 * \return The corresponding `binder::Status`.
 */
// convert: Return<Status> -> ::android::binder::Status
inline ::android::binder::Status toBinderStatus(
        Return<Status> const& t) {
    return ::android::binder::Status::fromStatusT(
            t.isOk() ? static_cast<status_t>(static_cast<Status>(t)) : UNKNOWN_ERROR);
}

/**
 * \brief Convert `Return<void>` to `status_t`. This is for legacy binder calls.
 *
 * \param[in] t The source `Return<void>`.
 * \return The corresponding `status_t`.
 */
// convert: Return<void> -> status_t
inline status_t toStatusT(Return<void> const& t) {
    return t.isOk() ? OK : UNKNOWN_ERROR;
}

/**
 * \brief Convert `Status` to `status_t`. This is for legacy binder calls.
 *
 * \param[in] t The source `Status`.
 * \return the corresponding `status_t`.
 */
// convert: Status -> status_t
inline status_t toStatusT(Status const& t) {
    switch (t) {
    case Status::NO_ERROR:
    case Status::NAME_NOT_FOUND:
    case Status::WOULD_BLOCK:
    case Status::NO_MEMORY:
    case Status::ALREADY_EXISTS:
    case Status::NO_INIT:
    case Status::BAD_VALUE:
    case Status::DEAD_OBJECT:
    case Status::INVALID_OPERATION:
    case Status::TIMED_OUT:
    case Status::ERROR_UNSUPPORTED:
    case Status::UNKNOWN_ERROR:
    case Status::RELEASE_ALL_BUFFERS:
        return static_cast<status_t>(t);
    case Status::BUFFER_NEEDS_REALLOCATION:
        return NOT_ENOUGH_DATA;
    default:
        ALOGW("Unrecognized status value: %" PRId32, static_cast<int32_t>(t));
        return static_cast<status_t>(t);
    }
}

/**
 * \brief Convert `Return<Status>` to `status_t`. This is for legacy binder
 * calls.
 *
 * \param[in] t The source `Return<Status>`.
 * \return The corresponding `status_t`.
 *
 * This function first check if \p t has a transport error. If it does, then the
 * return value is the transport error code. Otherwise, the return value is
 * converted from `Status` contained inside \p t.
 *
 * Note:
 * - This `Status` is omx-specific. It is defined in `types.hal`.
 * - The name of this function is not `convert`.
 */
// convert: Status -> status_t
inline status_t toStatusT(Return<Status> const& t) {
    if (t.isOk()) {
        return toStatusT(static_cast<Status>(t));
    } else if (t.isDeadObject()) {
        return DEAD_OBJECT;
    }
    return UNKNOWN_ERROR;
}

/**
 * \brief Convert `status_t` to `Status`.
 *
 * \param[in] l The source `status_t`.
 * \return The corresponding `Status`.
 */
// convert: status_t -> Status
inline Status toStatus(status_t l) {
    switch (l) {
    case NO_ERROR:
    case NAME_NOT_FOUND:
    case WOULD_BLOCK:
    case NO_MEMORY:
    case ALREADY_EXISTS:
    case NO_INIT:
    case BAD_VALUE:
    case DEAD_OBJECT:
    case INVALID_OPERATION:
    case TIMED_OUT:
    case ERROR_UNSUPPORTED:
    case UNKNOWN_ERROR:
    case BufferQueueDefs::RELEASE_ALL_BUFFERS:
    case BufferQueueDefs::BUFFER_NEEDS_REALLOCATION:
        return static_cast<Status>(l);
    case NOT_ENOUGH_DATA:
        return Status::BUFFER_NEEDS_REALLOCATION;
    default:
        ALOGW("Unrecognized status value: %" PRId32, static_cast<int32_t>(l));
        return static_cast<Status>(l);
    }
}

/**
 * \brief Wrap `native_handle_t*` in `hidl_handle`.
 *
 * \param[in] nh The source `native_handle_t*`.
 * \return The `hidl_handle` that points to \p nh.
 */
// wrap: native_handle_t* -> hidl_handle
inline hidl_handle inHidlHandle(native_handle_t const* nh) {
    return hidl_handle(nh);
}

/**
 * \brief Wrap an `omx_message` and construct the corresponding `Message`.
 *
 * \param[out] t The wrapper of type `Message`.
 * \param[out] nh The native_handle_t referred to by `t->fence`.
 * \param[in] l The source `omx_message`.
 * \return `true` if the wrapping is successful; `false` otherwise.
 *
 * Upon success, \p nh will be created to hold the file descriptor stored in
 * `l.fenceFd`, and `t->fence` will point to \p nh. \p nh will need to be
 * destroyed manually by `native_handle_delete()` when \p t is no longer needed.
 *
 * Upon failure, \p nh will not be created and will not need to be deleted. \p t
 * will be invalid.
 */
// wrap, omx_message -> Message, native_handle_t*
inline bool wrapAs(Message* t, native_handle_t** nh, omx_message const& l) {
    *nh = native_handle_create_from_fd(l.fenceFd);
    if (!*nh) {
        return false;
    }
    t->fence = *nh;
    switch (l.type) {
        case omx_message::EVENT:
            t->type = Message::Type::EVENT;
            t->data.eventData.event = uint32_t(l.u.event_data.event);
            t->data.eventData.data1 = l.u.event_data.data1;
            t->data.eventData.data2 = l.u.event_data.data2;
            t->data.eventData.data3 = l.u.event_data.data3;
            t->data.eventData.data4 = l.u.event_data.data4;
            break;
        case omx_message::EMPTY_BUFFER_DONE:
            t->type = Message::Type::EMPTY_BUFFER_DONE;
            t->data.bufferData.buffer = l.u.buffer_data.buffer;
            break;
        case omx_message::FILL_BUFFER_DONE:
            t->type = Message::Type::FILL_BUFFER_DONE;
            t->data.extendedBufferData.buffer = l.u.extended_buffer_data.buffer;
            t->data.extendedBufferData.rangeOffset =
                    l.u.extended_buffer_data.range_offset;
            t->data.extendedBufferData.rangeLength =
                    l.u.extended_buffer_data.range_length;
            t->data.extendedBufferData.flags = l.u.extended_buffer_data.flags;
            t->data.extendedBufferData.timestampUs =
                    l.u.extended_buffer_data.timestamp;
            break;
        case omx_message::FRAME_RENDERED:
            t->type = Message::Type::FRAME_RENDERED;
            t->data.renderData.timestampUs = l.u.render_data.timestamp;
            t->data.renderData.systemTimeNs = l.u.render_data.nanoTime;
            break;
        default:
            native_handle_delete(*nh);
            return false;
    }
    return true;
}

/**
 * \brief Wrap a `Message` inside an `omx_message`.
 *
 * \param[out] l The wrapper of type `omx_message`.
 * \param[in] t The source `Message`.
 * \return `true` if the wrapping is successful; `false` otherwise.
 */
// wrap: Message -> omx_message
inline bool wrapAs(omx_message* l, Message const& t) {
    l->fenceFd = native_handle_read_fd(t.fence);
    switch (t.type) {
        case Message::Type::EVENT:
            l->type = omx_message::EVENT;
            l->u.event_data.event = OMX_EVENTTYPE(t.data.eventData.event);
            l->u.event_data.data1 = t.data.eventData.data1;
            l->u.event_data.data2 = t.data.eventData.data2;
            l->u.event_data.data3 = t.data.eventData.data3;
            l->u.event_data.data4 = t.data.eventData.data4;
            break;
        case Message::Type::EMPTY_BUFFER_DONE:
            l->type = omx_message::EMPTY_BUFFER_DONE;
            l->u.buffer_data.buffer = t.data.bufferData.buffer;
            break;
        case Message::Type::FILL_BUFFER_DONE:
            l->type = omx_message::FILL_BUFFER_DONE;
            l->u.extended_buffer_data.buffer = t.data.extendedBufferData.buffer;
            l->u.extended_buffer_data.range_offset =
                    t.data.extendedBufferData.rangeOffset;
            l->u.extended_buffer_data.range_length =
                    t.data.extendedBufferData.rangeLength;
            l->u.extended_buffer_data.flags = t.data.extendedBufferData.flags;
            l->u.extended_buffer_data.timestamp =
                    t.data.extendedBufferData.timestampUs;
            break;
        case Message::Type::FRAME_RENDERED:
            l->type = omx_message::FRAME_RENDERED;
            l->u.render_data.timestamp = t.data.renderData.timestampUs;
            l->u.render_data.nanoTime = t.data.renderData.systemTimeNs;
            break;
        default:
            return false;
    }
    return true;
}

/**
 * \brief Similar to `wrapTo(omx_message*, Message const&)`, but the output will
 * have an extended lifetime.
 *
 * \param[out] l The output `omx_message`.
 * \param[in] t The source `Message`.
 * \return `true` if the conversion is successful; `false` otherwise.
 *
 * This function calls `wrapto()`, then attempts to duplicate the file
 * descriptor for the fence if it is not `-1`. If duplication fails, `false`
 * will be returned.
 */
// convert: Message -> omx_message
inline bool convertTo(omx_message* l, Message const& t) {
    if (!wrapAs(l, t)) {
        return false;
    }
    if (l->fenceFd == -1) {
        return true;
    }
    l->fenceFd = dup(l->fenceFd);
    return l->fenceFd != -1;
}

/**
 * \brief Wrap an `OMXFenceParcelable` inside a `hidl_handle`.
 *
 * \param[out] t The wrapper of type `hidl_handle`.
 * \param[out] nh The native handle created to hold the file descriptor inside
 * \p l.
 * \param[in] l The source `OMXFenceParcelable`, which essentially contains one
 * file descriptor.
 * \return `true` if \p t and \p nh are successfully created to wrap around \p
 * l; `false` otherwise.
 *
 * On success, \p nh needs to be deleted by the caller with
 * `native_handle_delete()` after \p t and \p nh are no longer needed.
 *
 * On failure, \p nh will not need to be deleted, and \p t will hold an invalid
 * value.
 */
// wrap: OMXFenceParcelable -> hidl_handle, native_handle_t*
inline bool wrapAs(hidl_handle* t, native_handle_t** nh,
        OMXFenceParcelable const& l) {
    *nh = native_handle_create_from_fd(l.get());
    if (!*nh) {
        return false;
    }
    *t = *nh;
    return true;
}

/**
 * \brief Wrap a `hidl_handle` inside an `OMXFenceParcelable`.
 *
 * \param[out] l The wrapper of type `OMXFenceParcelable`.
 * \param[in] t The source `hidl_handle`.
 */
// wrap: hidl_handle -> OMXFenceParcelable
inline void wrapAs(OMXFenceParcelable* l, hidl_handle const& t) {
    l->mFenceFd = native_handle_read_fd(t);
}

/**
 * \brief Convert a `hidl_handle` to `OMXFenceParcelable`. If `hidl_handle`
 * contains file descriptors, the first file descriptor will be duplicated and
 * stored in the output `OMXFenceParcelable`.
 *
 * \param[out] l The output `OMXFenceParcelable`.
 * \param[in] t The input `hidl_handle`.
 * \return `false` if \p t contains a valid file descriptor but duplication
 * fails; `true` otherwise.
 */
// convert: hidl_handle -> OMXFenceParcelable
inline bool convertTo(OMXFenceParcelable* l, hidl_handle const& t) {
    int fd = native_handle_read_fd(t);
    if (fd != -1) {
        fd = dup(fd);
        if (fd == -1) {
            return false;
        }
    }
    l->mFenceFd = fd;
    return true;
}

/**
 * \brief Convert `::android::ColorAspects` to `ColorAspects`.
 *
 * \param[in] l The source `::android::ColorAspects`.
 * \return The corresponding `ColorAspects`.
 */
// convert: ::android::ColorAspects -> ColorAspects
inline ColorAspects toHardwareColorAspects(::android::ColorAspects const& l) {
    return ColorAspects{
            static_cast<ColorAspects::Range>(l.mRange),
            static_cast<ColorAspects::Primaries>(l.mPrimaries),
            static_cast<ColorAspects::Transfer>(l.mTransfer),
            static_cast<ColorAspects::MatrixCoeffs>(l.mMatrixCoeffs)};
}

/**
 * \brief Convert `int32_t` to `ColorAspects`.
 *
 * \param[in] l The source `int32_t`.
 * \return The corresponding `ColorAspects`.
 */
// convert: int32_t -> ColorAspects
inline ColorAspects toHardwareColorAspects(int32_t l) {
    return ColorAspects{
            static_cast<ColorAspects::Range>((l >> 24) & 0xFF),
            static_cast<ColorAspects::Primaries>((l >> 16) & 0xFF),
            static_cast<ColorAspects::Transfer>(l & 0xFF),
            static_cast<ColorAspects::MatrixCoeffs>((l >> 8) & 0xFF)};
}

/**
 * \brief Convert `ColorAspects` to `::android::ColorAspects`.
 *
 * \param[in] t The source `ColorAspects`.
 * \return The corresponding `::android::ColorAspects`.
 */
// convert: ColorAspects -> ::android::ColorAspects
inline int32_t toCompactColorAspects(ColorAspects const& t) {
    return static_cast<int32_t>(
            (static_cast<uint32_t>(t.range) << 24) |
            (static_cast<uint32_t>(t.primaries) << 16) |
            (static_cast<uint32_t>(t.transfer)) |
            (static_cast<uint32_t>(t.matrixCoeffs) << 8));
}

/**
 * \brief Convert `int32_t` to `Dataspace`.
 *
 * \param[in] l The source `int32_t`.
 * \result The corresponding `Dataspace`.
 */
// convert: int32_t -> Dataspace
inline Dataspace toHardwareDataspace(int32_t l) {
    return static_cast<Dataspace>(l);
}

/**
 * \brief Convert `Dataspace` to `int32_t`.
 *
 * \param[in] t The source `Dataspace`.
 * \result The corresponding `int32_t`.
 */
// convert: Dataspace -> int32_t
inline int32_t toRawDataspace(Dataspace const& t) {
    return static_cast<int32_t>(t);
}

/**
 * \brief Wrap an opaque buffer inside a `hidl_vec<uint8_t>`.
 *
 * \param[in] l The pointer to the beginning of the opaque buffer.
 * \param[in] size The size of the buffer.
 * \return A `hidl_vec<uint8_t>` that points to the buffer.
 */
// wrap: void*, size_t -> hidl_vec<uint8_t>
inline hidl_vec<uint8_t> inHidlBytes(void const* l, size_t size) {
    hidl_vec<uint8_t> t;
    t.setToExternal(static_cast<uint8_t*>(const_cast<void*>(l)), size, false);
    return t;
}

/**
 * \brief Create a `hidl_vec<uint8_t>` that is a copy of an opaque buffer.
 *
 * \param[in] l The pointer to the beginning of the opaque buffer.
 * \param[in] size The size of the buffer.
 * \return A `hidl_vec<uint8_t>` that is a copy of the input buffer.
 */
// convert: void*, size_t -> hidl_vec<uint8_t>
inline hidl_vec<uint8_t> toHidlBytes(void const* l, size_t size) {
    hidl_vec<uint8_t> t;
    t.resize(size);
    uint8_t const* src = static_cast<uint8_t const*>(l);
    std::copy(src, src + size, t.data());
    return t;
}

/**
 * \brief Wrap `GraphicBuffer` in `AnwBuffer`.
 *
 * \param[out] t The wrapper of type `AnwBuffer`.
 * \param[in] l The source `GraphicBuffer`.
 */
// wrap: GraphicBuffer -> AnwBuffer
inline void wrapAs(AnwBuffer* t, GraphicBuffer const& l) {
    t->attr.width = l.getWidth();
    t->attr.height = l.getHeight();
    t->attr.stride = l.getStride();
    t->attr.format = static_cast<PixelFormat>(l.getPixelFormat());
    t->attr.layerCount = l.getLayerCount();
    t->attr.usage = l.getUsage();
    t->attr.id = l.getId();
    t->attr.generationNumber = l.getGenerationNumber();
    t->nativeHandle = hidl_handle(l.handle);
}

/**
 * \brief Convert `AnwBuffer` to `GraphicBuffer`.
 *
 * \param[out] l The destination `GraphicBuffer`.
 * \param[in] t The source `AnwBuffer`.
 *
 * This function will duplicate all file descriptors in \p t.
 */
// convert: AnwBuffer -> GraphicBuffer
// Ref: frameworks/native/libs/ui/GraphicBuffer.cpp: GraphicBuffer::flatten
inline bool convertTo(GraphicBuffer* l, AnwBuffer const& t) {
    native_handle_t* handle = nullptr;

    if (t.nativeHandle != nullptr) {
        handle = native_handle_clone(t.nativeHandle);
        if (handle == nullptr) {
            ALOGE("Failed to clone handle: numFds=%d, data[0]=%d, data[1]=%d",
                    t.nativeHandle->numFds,
                    (t.nativeHandle->numFds > 0) ? t.nativeHandle->data[0] : -1,
                    (t.nativeHandle->numFds > 1) ? t.nativeHandle->data[1] : -1);
            return false;
        }
    }

    size_t const numInts = 12 + (handle ? handle->numInts : 0);
    int32_t* ints = new int32_t[numInts];

    size_t numFds = static_cast<size_t>(handle ? handle->numFds : 0);
    int* fds = new int[numFds];

    ints[0] = 'GBFR';
    ints[1] = static_cast<int32_t>(t.attr.width);
    ints[2] = static_cast<int32_t>(t.attr.height);
    ints[3] = static_cast<int32_t>(t.attr.stride);
    ints[4] = static_cast<int32_t>(t.attr.format);
    ints[5] = static_cast<int32_t>(t.attr.layerCount);
    ints[6] = static_cast<int32_t>(t.attr.usage);
    ints[7] = static_cast<int32_t>(t.attr.id >> 32);
    ints[8] = static_cast<int32_t>(t.attr.id & 0xFFFFFFFF);
    ints[9] = static_cast<int32_t>(t.attr.generationNumber);
    ints[10] = 0;
    ints[11] = 0;
    if (handle) {
        ints[10] = static_cast<int32_t>(handle->numFds);
        ints[11] = static_cast<int32_t>(handle->numInts);
        int* intsStart = handle->data + handle->numFds;
        std::copy(handle->data, intsStart, fds);
        std::copy(intsStart, intsStart + handle->numInts, &ints[12]);
    }

    void const* constBuffer = static_cast<void const*>(ints);
    size_t size = numInts * sizeof(int32_t);
    int const* constFds = static_cast<int const*>(fds);
    status_t status = l->unflatten(constBuffer, size, constFds, numFds);

    delete [] fds;
    delete [] ints;
    native_handle_delete(handle);
    return status == NO_ERROR;
}

/**
 * \brief Wrap `OMXBuffer` in `CodecBuffer`.
 *
 * \param[out] t The wrapper of type `CodecBuffer`.
 * \param[in] l The source `OMXBuffer`.
 * \return `true` if the wrapping is successful; `false` otherwise.
 */
// wrap: OMXBuffer -> CodecBuffer
inline bool wrapAs(CodecBuffer* t, OMXBuffer const& l) {
    t->sharedMemory = hidl_memory();
    t->nativeHandle = hidl_handle();
    switch (l.mBufferType) {
        case OMXBuffer::kBufferTypeInvalid: {
            t->type = CodecBuffer::Type::INVALID;
            return true;
        }
        case OMXBuffer::kBufferTypePreset: {
            t->type = CodecBuffer::Type::PRESET;
            t->attr.preset.rangeLength = static_cast<uint32_t>(l.mRangeLength);
            t->attr.preset.rangeOffset = static_cast<uint32_t>(l.mRangeOffset);
            return true;
        }
        case OMXBuffer::kBufferTypeHidlMemory: {
            t->type = CodecBuffer::Type::SHARED_MEM;
            t->sharedMemory = l.mHidlMemory;
            return true;
        }
        case OMXBuffer::kBufferTypeSharedMem: {
            // This is not supported.
            return false;
        }
        case OMXBuffer::kBufferTypeANWBuffer: {
            t->type = CodecBuffer::Type::ANW_BUFFER;
            if (l.mGraphicBuffer == nullptr) {
                t->attr.anwBuffer.width = 0;
                t->attr.anwBuffer.height = 0;
                t->attr.anwBuffer.stride = 0;
                t->attr.anwBuffer.format = static_cast<PixelFormat>(1);
                t->attr.anwBuffer.layerCount = 0;
                t->attr.anwBuffer.usage = 0;
                return true;
            }
            t->attr.anwBuffer.width = l.mGraphicBuffer->getWidth();
            t->attr.anwBuffer.height = l.mGraphicBuffer->getHeight();
            t->attr.anwBuffer.stride = l.mGraphicBuffer->getStride();
            t->attr.anwBuffer.format = static_cast<PixelFormat>(
                    l.mGraphicBuffer->getPixelFormat());
            t->attr.anwBuffer.layerCount = l.mGraphicBuffer->getLayerCount();
            t->attr.anwBuffer.usage = l.mGraphicBuffer->getUsage();
            t->nativeHandle = l.mGraphicBuffer->handle;
            return true;
        }
        case OMXBuffer::kBufferTypeNativeHandle: {
            t->type = CodecBuffer::Type::NATIVE_HANDLE;
            t->nativeHandle = l.mNativeHandle->handle();
            return true;
        }
    }
    return false;
}

/**
 * \brief Convert `CodecBuffer` to `OMXBuffer`.
 *
 * \param[out] l The destination `OMXBuffer`.
 * \param[in] t The source `CodecBuffer`.
 * \return `true` if successful; `false` otherwise.
 */
// convert: CodecBuffer -> OMXBuffer
inline bool convertTo(OMXBuffer* l, CodecBuffer const& t) {
    switch (t.type) {
        case CodecBuffer::Type::INVALID: {
            *l = OMXBuffer();
            return true;
        }
        case CodecBuffer::Type::PRESET: {
            *l = OMXBuffer(
                    t.attr.preset.rangeOffset,
                    t.attr.preset.rangeLength);
            return true;
        }
        case CodecBuffer::Type::SHARED_MEM: {
            *l = OMXBuffer(t.sharedMemory);
            return true;
        }
        case CodecBuffer::Type::ANW_BUFFER: {
            if (t.nativeHandle.getNativeHandle() == nullptr) {
                *l = OMXBuffer(sp<GraphicBuffer>(nullptr));
                return true;
            }
            AnwBuffer anwBuffer;
            // Explicitly get the native_handle_t* (in stead of assigning t.nativeHandle)
            // so that we don't do an extra native_handle_clone() in this step, as the
            // convertion to GraphicBuffer below will do a clone regardless.
            // If we encounter an invalid handle, the convertTo() below would fail (while
            // the assigning of hidl_handle would abort and cause a crash).
            anwBuffer.nativeHandle = t.nativeHandle.getNativeHandle();
            anwBuffer.attr = t.attr.anwBuffer;
            sp<GraphicBuffer> graphicBuffer = new GraphicBuffer();
            if (!convertTo(graphicBuffer.get(), anwBuffer)) {
                return false;
            }
            *l = OMXBuffer(graphicBuffer);
            return true;
        }
        case CodecBuffer::Type::NATIVE_HANDLE: {
            *l = OMXBuffer(NativeHandle::create(
                    native_handle_clone(t.nativeHandle), true));
            return true;
        }
    }
    return false;
}

/**
 * \brief Convert `IOMX::ComponentInfo` to `IOmx::ComponentInfo`.
 *
 * \param[out] t The destination `IOmx::ComponentInfo`.
 * \param[in] l The source `IOMX::ComponentInfo`.
 */
// convert: IOMX::ComponentInfo -> IOmx::ComponentInfo
inline bool convertTo(IOmx::ComponentInfo* t, IOMX::ComponentInfo const& l) {
    t->mName = l.mName.string();
    t->mRoles.resize(l.mRoles.size());
    size_t i = 0;
    for (auto& role : l.mRoles) {
        t->mRoles[i++] = role.string();
    }
    return true;
}

/**
 * \brief Convert `IOmx::ComponentInfo` to `IOMX::ComponentInfo`.
 *
 * \param[out] l The destination `IOMX::ComponentInfo`.
 * \param[in] t The source `IOmx::ComponentInfo`.
 */
// convert: IOmx::ComponentInfo -> IOMX::ComponentInfo
inline bool convertTo(IOMX::ComponentInfo* l, IOmx::ComponentInfo const& t) {
    l->mName = t.mName.c_str();
    l->mRoles.clear();
    for (size_t i = 0; i < t.mRoles.size(); ++i) {
        l->mRoles.push_back(String8(t.mRoles[i].c_str()));
    }
    return true;
}

/**
 * \brief Convert `OMX_BOOL` to `bool`.
 *
 * \param[in] l The source `OMX_BOOL`.
 * \return The destination `bool`.
 */
// convert: OMX_BOOL -> bool
inline bool toRawBool(OMX_BOOL l) {
    return l == OMX_FALSE ? false : true;
}

/**
 * \brief Convert `bool` to `OMX_BOOL`.
 *
 * \param[in] t The source `bool`.
 * \return The destination `OMX_BOOL`.
 */
// convert: bool -> OMX_BOOL
inline OMX_BOOL toEnumBool(bool t) {
    return t ? OMX_TRUE : OMX_FALSE;
}

/**
 * \brief Convert `OMX_COMMANDTYPE` to `uint32_t`.
 *
 * \param[in] l The source `OMX_COMMANDTYPE`.
 * \return The underlying value of type `uint32_t`.
 *
 * `OMX_COMMANDTYPE` is an enum type whose underlying type is `uint32_t`.
 */
// convert: OMX_COMMANDTYPE -> uint32_t
inline uint32_t toRawCommandType(OMX_COMMANDTYPE l) {
    return static_cast<uint32_t>(l);
}

/**
 * \brief Convert `uint32_t` to `OMX_COMMANDTYPE`.
 *
 * \param[in] t The source `uint32_t`.
 * \return The corresponding enum value of type `OMX_COMMANDTYPE`.
 *
 * `OMX_COMMANDTYPE` is an enum type whose underlying type is `uint32_t`.
 */
// convert: uint32_t -> OMX_COMMANDTYPE
inline OMX_COMMANDTYPE toEnumCommandType(uint32_t t) {
    return static_cast<OMX_COMMANDTYPE>(t);
}

/**
 * \brief Convert `OMX_INDEXTYPE` to `uint32_t`.
 *
 * \param[in] l The source `OMX_INDEXTYPE`.
 * \return The underlying value of type `uint32_t`.
 *
 * `OMX_INDEXTYPE` is an enum type whose underlying type is `uint32_t`.
 */
// convert: OMX_INDEXTYPE -> uint32_t
inline uint32_t toRawIndexType(OMX_INDEXTYPE l) {
    return static_cast<uint32_t>(l);
}

/**
 * \brief Convert `uint32_t` to `OMX_INDEXTYPE`.
 *
 * \param[in] t The source `uint32_t`.
 * \return The corresponding enum value of type `OMX_INDEXTYPE`.
 *
 * `OMX_INDEXTYPE` is an enum type whose underlying type is `uint32_t`.
 */
// convert: uint32_t -> OMX_INDEXTYPE
inline OMX_INDEXTYPE toEnumIndexType(uint32_t t) {
    return static_cast<OMX_INDEXTYPE>(t);
}

/**
 * \brief Convert `IOMX::PortMode` to `PortMode`.
 *
 * \param[in] l The source `IOMX::PortMode`.
 * \return The destination `PortMode`.
 */
// convert: IOMX::PortMode -> PortMode
inline PortMode toHardwarePortMode(IOMX::PortMode l) {
    return static_cast<PortMode>(l);
}

/**
 * \brief Convert `PortMode` to `IOMX::PortMode`.
 *
 * \param[in] t The source `PortMode`.
 * \return The destination `IOMX::PortMode`.
 */
// convert: PortMode -> IOMX::PortMode
inline IOMX::PortMode toIOMXPortMode(PortMode t) {
    return static_cast<IOMX::PortMode>(t);
}

/**
 * \brief Convert `OMX_TICKS` to `uint64_t`.
 *
 * \param[in] l The source `OMX_TICKS`.
 * \return The destination `uint64_t`.
 */
// convert: OMX_TICKS -> uint64_t
inline uint64_t toRawTicks(OMX_TICKS l) {
#ifndef OMX_SKIP64BIT
    return static_cast<uint64_t>(l);
#else
    return static_cast<uint64_t>(l.nLowPart) |
            static_cast<uint64_t>(l.nHighPart << 32);
#endif
}

/**
 * \brief Convert `uint64_t` to `OMX_TICKS`.
 *
 * \param[in] l The source `uint64_t`.
 * \return The destination `OMX_TICKS`.
 */
// convert: uint64_t -> OMX_TICKS
inline OMX_TICKS toOMXTicks(uint64_t t) {
#ifndef OMX_SKIP64BIT
    return static_cast<OMX_TICKS>(t);
#else
    return OMX_TICKS{
            static_cast<uint32_t>(t & 0xFFFFFFFF),
            static_cast<uint32_t>(t >> 32)};
#endif
}

}  // namespace utils
}  // namespace V1_0
}  // namespace omx
}  // namespace media
}  // namespace hardware
}  // namespace android

#endif  // ANDROID_HARDWARE_MEDIA_OMX_V1_0_UTILS_CONVERSION_H