/*
 * Copyright (C) 2020 Samsung Electronics Co. Ltd.
 *
 * 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_TAG "VendorGraphicBuffer"

#include <log/log.h>
#include <gralloctypes/Gralloc4.h>
#include <android/hardware/graphics/mapper/4.0/IMapper.h>

#include "VendorGraphicBuffer.h"
#include "mali_gralloc_buffer.h"
#include "mali_gralloc_formats.h"
#include "hidl_common/SharedMetadata.h"
#include "exynos_format.h"

using namespace android;
using namespace vendor::graphics;

using arm::mapper::common::shared_metadata;
using aidl::android::hardware::graphics::common::Dataspace;
using android::gralloc4::encodeDataspace;
using android::gralloc4::decodeDataspace;
using android::hardware::graphics::mapper::V4_0::IMapper;
using android::hardware::graphics::mapper::V4_0::Error;

#define UNUSED(x) ((void)x)
#define SZ_4k 0x1000

// TODO(b/191912915): This is a non-thread safe version of the validate function
// from mapper-4.0-impl library. Ideally this should be decoupled from `impl`
// libraries and should depend upon HAL (and it's extension) to call into
// Gralloc.
int mali_gralloc_reference_validate(buffer_handle_t handle) {
	auto hnd = static_cast<const private_handle_t *>(handle);

	if (hnd->allocating_pid != getpid() && hnd->remote_pid != getpid()) {
		return -EINVAL;
	}

	return 0;
}

const private_handle_t * convertNativeHandleToPrivateHandle(buffer_handle_t handle) {
	if (mali_gralloc_reference_validate(handle) < 0)
		return nullptr;

	return static_cast<const private_handle_t *>(handle);
}

android::sp<IMapper> get_mapper() {
	static android::sp<IMapper> mapper = []() {
		auto mapper = IMapper::getService();
		if (!mapper) {
			ALOGE("Failed to get mapper service");
		}
		return mapper;
	}();

	return mapper;
}

int VendorGraphicBufferMeta::get_video_metadata_fd(buffer_handle_t hnd)
{
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(hnd);

	if (!gralloc_hnd)
		return -EINVAL;

	uint64_t usage = gralloc_hnd->producer_usage | gralloc_hnd->consumer_usage;

	if (usage & VendorGraphicBufferUsage::VIDEO_PRIVATE_DATA)
		return gralloc_hnd->get_share_attr_fd();
	else
		return -EINVAL;
}

int VendorGraphicBufferMeta::get_dataspace(buffer_handle_t hnd)
{
	native_handle_t* handle = const_cast<native_handle_t*>(hnd);
	if (!handle) {
		return -EINVAL;
	}

	Error error = Error::NONE;
	Dataspace dataspace;
	get_mapper()->get(handle, android::gralloc4::MetadataType_Dataspace,
	                  [&](const auto& tmpError, const android::hardware::hidl_vec<uint8_t>& tmpVec) {
	                  	error = tmpError;
	                  	if (error != Error::NONE) {
	                  		return;
	                  	}
	                  	error = static_cast<Error>(decodeDataspace(tmpVec, &dataspace));
	                  });


	if (error != Error::NONE) {
		ALOGE("Failed to get datasapce");
		return -EINVAL;
	}

	return static_cast<int>(dataspace);
}

int VendorGraphicBufferMeta::set_dataspace(buffer_handle_t hnd, android_dataspace_t dataspace)
{
	native_handle_t* handle = const_cast<native_handle_t*>(hnd);
	if (!handle) {
		return -EINVAL;
	}

	Error error = Error::NONE;
	android::hardware::hidl_vec<uint8_t> vec;
	error = static_cast<Error>(encodeDataspace(static_cast<Dataspace>(dataspace), &vec));
	if (error != Error::NONE) {
		ALOGE("Error encoding dataspace");
		return -EINVAL;
	}
	error = get_mapper()->set(handle, android::gralloc4::MetadataType_Dataspace, vec);

	if (error != Error::NONE) {
		ALOGE("Failed to set datasapce");
		return -EINVAL;
	}

	return 0;
}

int VendorGraphicBufferMeta::is_afbc(buffer_handle_t hnd)
{
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(hnd);

	if (!gralloc_hnd)
		return 0;

	if (gralloc_hnd->alloc_format & MALI_GRALLOC_INTFMT_AFBCENABLE_MASK)
		return 1;

	return 0;
}

int VendorGraphicBufferMeta::is_sbwc(buffer_handle_t buffer_hnd_p)
{
	const private_handle_t *hnd = static_cast<const private_handle_t *>(buffer_hnd_p);

	return is_sbwc_format(static_cast<uint32_t>(hnd->alloc_format & MALI_GRALLOC_INTFMT_FMT_MASK));
}

#define GRALLOC_META_GETTER(__type__, __name__, __member__) \
__type__ VendorGraphicBufferMeta::get_##__name__(buffer_handle_t hnd) \
{ \
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(hnd); \
	if (!gralloc_hnd) return 0; \
	return gralloc_hnd->__member__; \
} \


uint32_t VendorGraphicBufferMeta::get_format(buffer_handle_t hnd)
{
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(hnd);
	if (!gralloc_hnd)
		return 0;

	return static_cast<uint32_t>(gralloc_hnd->alloc_format);
}

uint64_t VendorGraphicBufferMeta::get_internal_format(buffer_handle_t hnd)
{
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(hnd);
	if (!gralloc_hnd)
		return 0;

	return static_cast<uint64_t>(gralloc_hnd->alloc_format & MALI_GRALLOC_INTFMT_FMT_MASK);
}

GRALLOC_META_GETTER(uint64_t, frameworkFormat, req_format);

GRALLOC_META_GETTER(int, width, width);
GRALLOC_META_GETTER(int, height, height);
GRALLOC_META_GETTER(uint32_t, stride, stride);
GRALLOC_META_GETTER(uint32_t, vstride, plane_info[0].alloc_height);

GRALLOC_META_GETTER(uint64_t, producer_usage, producer_usage);
GRALLOC_META_GETTER(uint64_t, consumer_usage, consumer_usage);

GRALLOC_META_GETTER(uint64_t, flags, flags);


int VendorGraphicBufferMeta::get_fd(buffer_handle_t hnd, int num)
{
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(hnd);

	if (!gralloc_hnd)
		return -1;

	if (num > 2)
		return -1;

	return gralloc_hnd->fds[num];
}

int VendorGraphicBufferMeta::get_size(buffer_handle_t hnd, int num)
{
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(hnd);

	if (!gralloc_hnd)
		return 0;

	if (num > 2)
		return 0;

	return gralloc_hnd->alloc_sizes[num];
}


uint64_t VendorGraphicBufferMeta::get_usage(buffer_handle_t hnd)
{
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(hnd);

	if (!gralloc_hnd)
		return 0;

	return gralloc_hnd->producer_usage | gralloc_hnd->consumer_usage;
}

void* VendorGraphicBufferMeta::get_video_metadata(buffer_handle_t hnd)
{
	const auto *gralloc_hnd = convertNativeHandleToPrivateHandle(hnd);

	if (gralloc_hnd == nullptr)
		return nullptr;

	return gralloc_hnd->attr_base;
}

void* VendorGraphicBufferMeta::get_video_metadata_roiinfo(buffer_handle_t hnd)
{
	const auto *gralloc_hnd = convertNativeHandleToPrivateHandle(hnd);

	if (gralloc_hnd == nullptr)
		return nullptr;

	if (gralloc_hnd->get_usage() & VendorGraphicBufferUsage::ROIINFO)
		return static_cast<char*>(gralloc_hnd->attr_base) + SZ_4k * 2;

	return nullptr;
}

void VendorGraphicBufferMeta::init(const buffer_handle_t handle)
{
	const private_handle_t *gralloc_hnd = static_cast<const private_handle_t *>(handle);

	if (!gralloc_hnd)
		return;

	fd = gralloc_hnd->fds[0];
	fd1 = gralloc_hnd->fds[1];
	fd2 = gralloc_hnd->fds[2];

	size   = gralloc_hnd->alloc_sizes[0];
	size1  = gralloc_hnd->alloc_sizes[1];
	size2  = gralloc_hnd->alloc_sizes[2];

	offsets[0] = gralloc_hnd->plane_info[0].offset;
	offsets[1] = gralloc_hnd->plane_info[1].offset;
	offsets[2] = gralloc_hnd->plane_info[2].offset;

	uint64_t usage = gralloc_hnd->producer_usage | gralloc_hnd->consumer_usage;
	if (usage & VendorGraphicBufferUsage::VIDEO_PRIVATE_DATA) {
		switch (gralloc_hnd->get_share_attr_fd_index()) {
		case 1:
			size1 = gralloc_hnd->attr_size;
			break;
		case 2:
			size2 = gralloc_hnd->attr_size;
			break;
		}
	}

	internal_format = gralloc_hnd->alloc_format;
	frameworkFormat = gralloc_hnd->req_format;

	width  = gralloc_hnd->width;
	height = gralloc_hnd->height;
	stride = gralloc_hnd->stride;
	vstride = gralloc_hnd->plane_info[0].alloc_height;

	producer_usage = gralloc_hnd->producer_usage;
	consumer_usage = gralloc_hnd->consumer_usage;

	flags = gralloc_hnd->flags;

	unique_id = gralloc_hnd->backing_store_id;
}

buffer_handle_t VendorGraphicBufferMeta::import_buffer(buffer_handle_t hnd)
{
	native_handle_t* handle = const_cast<native_handle_t*>(hnd);
	if (!handle) {
		return nullptr;
	}

	native_handle_t* bufferHandle = nullptr;
	Error error = Error::NONE;
	get_mapper()->importBuffer(handle, [&](const auto& tmpError, const auto& tmpBuffer) {
				error = tmpError;
				if (error != Error::NONE) {
					return;
				}
				bufferHandle = static_cast<native_handle_t*>(tmpBuffer);
			});

	if (error != Error::NONE) {
		ALOGE("[%s] Unable to import buffer", __FUNCTION__);
		return nullptr;
	}

	return bufferHandle;
}

int VendorGraphicBufferMeta::free_buffer(buffer_handle_t hnd)
{
	native_handle_t* handle = const_cast<native_handle_t*>(hnd);
	if (!handle) {
		return -EINVAL;
	}
	Error error = get_mapper()->freeBuffer(handle);
	if (error != Error::NONE) {
		ALOGE("[%s] Failed to free buffer", __FUNCTION__);
		return -EINVAL;
	}
	return 0;
}

VendorGraphicBufferMeta::VendorGraphicBufferMeta(buffer_handle_t handle)
{
	init(handle);
}