/*
 * Copyright (C) 2017 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.
 */

package android.hardware.media.omx@1.0;

import android.hardware.media@1.0::types;

// Aliases
typedef uint32_t BufferId;

/**
 * Ref: system/core/include/utils/Errors.h
 * Ref: bionic/libc/kernel/uapi/asm-generic/errno-base.h
 * Ref: bionic/libc/kernel/uapi/asm-generic/errno.h
 * Ref: frameworks/av/include/media/stagefright/MediaError.h
 * Ref: frameworks/av/media/libstagefright/omx/OMXUtils.cpp: StatusFromOMXError
 */
enum Status : int32_t {
    OK                      = 0,
    NO_ERROR                = 0,

    NAME_NOT_FOUND          = -2,
    WOULD_BLOCK             = -11,
    NO_MEMORY               = -12,
    ALREADY_EXISTS          = -17,
    NO_INIT                 = -19,
    BAD_VALUE               = -22,
    DEAD_OBJECT             = -32,
    INVALID_OPERATION       = -38,
    TIMED_OUT               = -110,
    ERROR_UNSUPPORTED       = -1010,
    UNKNOWN_ERROR           = -2147483648,

    BUFFER_NEEDS_REALLOCATION = 0x1,
    RELEASE_ALL_BUFFERS       = 0x2,
};

/**
 * Ref: frameworks/av/include/media/IOMX.h: omx_message
 *
 * Data structure for an OMX message. This is essentially a union of different
 * message types.
 */
struct Message {

    /**
     * There are four main types of messages.
     */
    enum Type : uint32_t {
        EVENT,
        EMPTY_BUFFER_DONE,
        FILL_BUFFER_DONE,
        FRAME_RENDERED,
    };

    /**
     * @see OMX_EVENTTYPE in the OpenMax IL standard.
     */
    struct EventData {
        uint32_t event; // TODO: if there are common core events, convert to an enum or point to std
        uint32_t data1;
        uint32_t data2;
        uint32_t data3;
        uint32_t data4;
    };

    struct BufferData {
        BufferId buffer;
    };

    struct ExtendedBufferData {
        BufferId buffer;
        uint32_t rangeOffset;
        uint32_t rangeLength;
        uint32_t flags; // TODO: if common flags exist, define an enum of point to std
        uint64_t timestampUs;
    };

    struct RenderData {
        uint64_t timestampUs;
        int64_t systemTimeNs;
    };

    union Data {
        // if type == EVENT
        EventData eventData;

        // if type == EMPTY_BUFFER_DONE
        BufferData bufferData;

        // if type == FILL_BUFFER_DONE
        ExtendedBufferData extendedBufferData;

        // if type == FRAME_RENDERED
        RenderData renderData;
    };

    /**
     * The type of the message.
     */
    Type type;

    /**
     * The fence associated with the message.
     */
    Fence fence;

    /**
     * The union of data, discriminated by type.
     */
    Data data;
};

/**
 * Ref: frameworks/native/include/ui/GraphicBuffer.h
 * Ref: system/core/include/system/window.h
 * Ref: frameworks/native/include/binder/IMemory.h
 * Ref: frameworks/native/libs/binder/IMemory.cpp
 * Ref: frameworks/av/include/media/OMXBuffer.h
 *
 * Data structure for buffer information. This is essentially a union of
 * different buffer types.
 */
struct CodecBuffer {

    /**
     * There are four main types of buffers.
     */
    enum Type : int32_t {
        INVALID = 0,
        PRESET,
        SHARED_MEM,
        ANW_BUFFER,
        NATIVE_HANDLE,
    };

    struct PresetAttributes {
        uint32_t rangeOffset;
        uint32_t rangeLength;
    };

    union Attributes {
        // if bufferType == PRESET
        PresetAttributes preset;

        // if bufferType == SHARED_MEM
        // No additional attributes.

        // if bufferType == ANW_BUFFER
        AnwBufferAttributes anwBuffer;

        // if bufferType == NATIVE_HANDLE
        // No additional attributes.
    };

    /**
     * Type of the buffer.
     */
    Type type;

    /**
     * Attributes that can be put into a union.
     */
    Attributes attr;

    /**
     * Used only for types ANW_BUFFER and NATIVE_HANDLE.
     *
     * (A native handle cannot be put into a union as HIDL currently does not
     * support discriminated unions.)
     */
    handle nativeHandle;

    /**
     * Used only for type SHARED_MEM.
     */
    memory sharedMemory;

};

/**
 * Ref: frameworks/av/include/media/IOMX.h
 *
 * Enumeration of port modes.
 */
enum PortMode : int32_t {
    PRESET_START = 0,
    PRESET_BYTE_BUFFER,
    PRESET_ANW_BUFFER,
    PRESET_SECURE_BUFFER,
    PRESET_END,
    DYNAMIC_START = 100,
    DYNAMIC_ANW_BUFFER,
    DYNAMIC_NATIVE_HANDLE,
    DYNAMIC_END
};

/**
 * Ref: frameworks/native/include/media/hardware/VideoAPI.h
 *
 * Framework defined color aspects. These are based mainly on ISO 23001-8 spec. As this standard
 * continues to evolve, new values may be defined in the future. Use OTHER for these future values
 * as well as for values not listed here, as those are not supported by the framework.
 */
struct ColorAspects {
    enum Range : uint32_t {
        UNSPECIFIED,  // Unspecified
        FULL,         // Full range
        LIMITED,      // Limited range (if defined), or not full range

        OTHER = 0xff, // Not one of the above values
    };

    // Color primaries
    enum Primaries : uint32_t {
        UNSPECIFIED,  // Unspecified
        BT709_5,      // Rec.ITU-R BT.709-5 or equivalent
        BT470_6M,     // Rec.ITU-R BT.470-6 System M or equivalent
        BT601_6_625,  // Rec.ITU-R BT.601-6 625 or equivalent
        BT601_6_525,  // Rec.ITU-R BT.601-6 525 or equivalent
        GENERIC_FILM, // Generic Film
        BT2020,       // Rec.ITU-R BT.2020 or equivalent

        OTHER = 0xff, // Not one of the above values
    };

    // Transfer characteristics
    enum Transfer : uint32_t {
        UNSPECIFIED,  // Unspecified
        LINEAR,       // Linear transfer characteristics
        SRGB,         // sRGB or equivalent
        SMPTE170M,    // SMPTE 170M or equivalent (e.g. BT.601/709/2020)
        GAMMA22,      // Assumed display gamma 2.2
        GAMMA28,      // Assumed display gamma 2.8
        ST2084,       // SMPTE ST 2084 for 10/12/14/16 bit systems
        HLG,          // ARIB STD-B67 hybrid-log-gamma

        // values unlikely to be required by Android follow here
        SMPTE240M = 0x40, // SMPTE 240M
        XVYCC,        // IEC 61966-2-4
        BT1361,       // Rec.ITU-R BT.1361 extended gamut
        ST428,        // SMPTE ST 428-1

        OTHER = 0xff, // Not one of the above values
    };

    // YUV <-> RGB conversion
    enum MatrixCoeffs : uint32_t {
        UNSPECIFIED,    // Unspecified
        BT709_5,        // Rec.ITU-R BT.709-5 or equivalent
        BT470_6M,       // KR=0.30, KB=0.11 or equivalent
        BT601_6,        // Rec.ITU-R BT.601-6 625 or equivalent
        SMPTE240M,      // SMPTE 240M or equivalent
        BT2020,         // Rec.ITU-R BT.2020 non-constant luminance
        BT2020CONSTANT, // Rec.ITU-R BT.2020 constant luminance

        OTHER = 0xff,   // Not one of the above values
    };

    Range range;
    Primaries primaries;
    Transfer transfer;
    MatrixCoeffs matrixCoeffs;
};