/*
 * Copyright (C) 2010 ARM Limited. All rights reserved.
 *
 * Copyright (C) 2008 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 <string.h>
#include <errno.h>
#include <pthread.h>

#include <cutils/log.h>
#include <cutils/atomic.h>
#include <hardware/hardware.h>
#include <hardware/gralloc.h>

#include <sys/ioctl.h>

#include "alloc_device.h"
#include "gralloc_priv.h"
#include "gralloc_helper.h"
#include "framebuffer_device.h"

#include "alloc_device_allocator_specific.h"
#include "gralloc_buffer_priv.h"

#include "mali_gralloc_formats.h"

#define AFBC_PIXELS_PER_BLOCK                    16
#define AFBC_HEADER_BUFFER_BYTES_PER_BLOCKENTRY  16

#define AFBC_BODY_BUFFER_BYTE_ALIGNMENT          1024
#define AFBC_NORMAL_WIDTH_ALIGN                  16
#define AFBC_NORMAL_HEIGHT_ALIGN                 16
#define AFBC_WIDEBLK_WIDTH_ALIGN                 32
#define AFBC_WIDEBLK_HEIGHT_ALIGN                16
// Regarding Tiled Headers AFBC mode, both header and body buffer should aligned to 4KB
// and in non-wide mode (16x16), the width and height should be both rounded up to 128
// in wide mode (32x8) the width should be rounded up to 256, the height should be rounded up to 64
#define AFBC_TILED_HEADERS_BASIC_WIDTH_ALIGN           128
#define AFBC_TILED_HEADERS_BASIC_HEIGHT_ALIGN          128
#define AFBC_TILED_HEADERS_WIDEBLK_WIDTH_ALIGN         256
#define AFBC_TILED_HEADERS_WIDEBLK_HEIGHT_ALIGN        64

// This value is platform specific and should be set according to hardware YUV planes restrictions.
// Please note that EGL winsys platform config file needs to use the same value when importing buffers.
#define YUV_MALI_PLANE_ALIGN 128

// Default YUV stride aligment in Android
#define YUV_ANDROID_PLANE_ALIGN 16

static int gralloc_alloc_framebuffer_locked(alloc_device_t* dev, size_t size, int usage, buffer_handle_t* pHandle, int* stride, int* byte_stride)
{
	private_module_t* m = reinterpret_cast<private_module_t*>(dev->common.module);

	// allocate the framebuffer
	if (m->framebuffer == NULL)
	{
		// initialize the framebuffer, the framebuffer is mapped once and forever.
		int err = init_frame_buffer_locked(m);
		if (err < 0)
		{
			return err;
		}
	}

	const uint32_t bufferMask = m->bufferMask;
	const uint32_t numBuffers = m->numBuffers;
	/* framebufferSize is used for allocating the handle to the framebuffer and refers
	 *                 to the size of the actual framebuffer.
	 * alignedFramebufferSize is used for allocating a possible internal buffer and
	 *                        thus need to consider internal alignment requirements. */
	const size_t framebufferSize = m->finfo.line_length * m->info.yres;
	const size_t alignedFramebufferSize = GRALLOC_ALIGN(m->finfo.line_length, 64) * m->info.yres;

	*stride = m->info.xres;

	if (numBuffers == 1)
	{
		// If we have only one buffer, we never use page-flipping. Instead,
		// we return a regular buffer which will be memcpy'ed to the main
		// screen when post is called.
		int newUsage = (usage & ~GRALLOC_USAGE_HW_FB) | GRALLOC_USAGE_HW_2D;
		AWAR( "fallback to single buffering. Virtual Y-res too small %d", m->info.yres );
		*byte_stride = GRALLOC_ALIGN(m->finfo.line_length, 64);
		return alloc_backend_alloc(dev, alignedFramebufferSize, newUsage, pHandle, 0, 0, 0);
	}

	if (bufferMask >= ((1LU<<numBuffers)-1))
	{
		// We ran out of buffers.
		return -ENOMEM;
	}

	uintptr_t framebufferVaddr = (uintptr_t)m->framebuffer->base;
	// find a free slot
	for (uint32_t i=0 ; i<numBuffers ; i++)
	{
		if ((bufferMask & (1LU<<i)) == 0)
		{
			m->bufferMask |= (1LU<<i);
			break;
		}
		framebufferVaddr += framebufferSize;
	}

	// The entire framebuffer memory is already mapped, now create a buffer object for parts of this memory
	private_handle_t* hnd = new private_handle_t(private_handle_t::PRIV_FLAGS_FRAMEBUFFER, usage, size,
			(void*)framebufferVaddr, 0, dup(m->framebuffer->fd),
			(framebufferVaddr - (uintptr_t)m->framebuffer->base));

	/*
	 * Perform allocator specific actions. If these fail we fall back to a regular buffer
	 * which will be memcpy'ed to the main screen when fb_post is called.
	 */
	if (alloc_backend_alloc_framebuffer(m, hnd) == -1)
	{
		delete hnd;
		int newUsage = (usage & ~GRALLOC_USAGE_HW_FB) | GRALLOC_USAGE_HW_2D;
		AERR( "Fallback to single buffering. Unable to map framebuffer memory to handle:%p", hnd );
		*byte_stride = GRALLOC_ALIGN(m->finfo.line_length, 64);
		return alloc_backend_alloc(dev, alignedFramebufferSize, newUsage, pHandle, 0, 0, 0);
	}

	*pHandle = hnd;
	*byte_stride = m->finfo.line_length;

	return 0;
}

static int gralloc_alloc_framebuffer(alloc_device_t* dev, size_t size, int usage, buffer_handle_t* pHandle, int* stride, int* byte_stride)
{
	private_module_t* m = reinterpret_cast<private_module_t*>(dev->common.module);
	pthread_mutex_lock(&m->lock);
	int err = gralloc_alloc_framebuffer_locked(dev, size, usage, pHandle, stride, byte_stride);
	pthread_mutex_unlock(&m->lock);
	return err;
}

/*
 * Type of allocation
 */
enum AllocType
{
	UNCOMPRESSED = 0,
	AFBC,
	/* AFBC_WIDEBLK mode requires buffer to have 32 * 16 pixels alignment */
	AFBC_WIDEBLK,
	/* AN AFBC buffer with additional padding to ensure a 64-bte alignment
	 * for each row of blocks in the header */
	AFBC_PADDED,
	/* AFBC_TILED_HEADERS_AFBC_BASIC mode requires buffer to have 128*128 pixels alignment(16x16 superblocks) */
	AFBC_TILED_HEADERS_BASIC,
	/* AFBC_TILED_HEADERS_AFBC_WIDEBLK mode requires buffer to have 256*64 pixels alignment(32x8 superblocks) */
	AFBC_TILED_HEADERS_WIDEBLK,
};

/*
 * Computes the strides and size for an RGB buffer
 *
 * width               width of the buffer in pixels
 * height              height of the buffer in pixels
 * pixel_size          size of one pixel in bytes
 *
 * pixel_stride (out)  stride of the buffer in pixels
 * byte_stride  (out)  stride of the buffer in bytes
 * size         (out)  size of the buffer in bytes
 * type         (in)   if buffer should be allocated for afbc
 */
static void get_rgb_stride_and_size(int width, int height, int pixel_size,
                                    int* pixel_stride, int* byte_stride, size_t* size, AllocType type)
{
	int stride;

	stride = width * pixel_size;

	/* Align the lines to 64 bytes.
	 * It's more efficient to write to 64-byte aligned addresses because it's the burst size on the bus */
	stride = GRALLOC_ALIGN(stride, 64);

	if (size != NULL)
	{
		*size = stride * height;
	}

	if (byte_stride != NULL)
	{
		*byte_stride = stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = stride / pixel_size;
	}

	if (type != UNCOMPRESSED)
	{
		int w_aligned;
		int h_aligned = GRALLOC_ALIGN( height, AFBC_NORMAL_HEIGHT_ALIGN );
		int nblocks;
		int buffer_byte_alignment = AFBC_BODY_BUFFER_BYTE_ALIGNMENT;

		if (type == AFBC_TILED_HEADERS_BASIC)
		{
			w_aligned = GRALLOC_ALIGN( width, AFBC_TILED_HEADERS_BASIC_WIDTH_ALIGN );
			h_aligned = GRALLOC_ALIGN( height, AFBC_TILED_HEADERS_BASIC_HEIGHT_ALIGN );
			buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
		}
		else if (type == AFBC_TILED_HEADERS_WIDEBLK)
		{
			w_aligned = GRALLOC_ALIGN( width, AFBC_TILED_HEADERS_WIDEBLK_WIDTH_ALIGN );
			h_aligned = GRALLOC_ALIGN( height, AFBC_TILED_HEADERS_WIDEBLK_HEIGHT_ALIGN );
			buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
		}
		else if (type == AFBC_PADDED)
		{
			w_aligned = GRALLOC_ALIGN( width, 64 );
		}
		else if (type == AFBC_WIDEBLK)
		{
			w_aligned = GRALLOC_ALIGN( width, AFBC_WIDEBLK_WIDTH_ALIGN );
			h_aligned = GRALLOC_ALIGN( height, AFBC_WIDEBLK_HEIGHT_ALIGN );
		}
		else
		{
			w_aligned = GRALLOC_ALIGN( width, AFBC_NORMAL_WIDTH_ALIGN );
		}

		nblocks = w_aligned / AFBC_PIXELS_PER_BLOCK * h_aligned / AFBC_PIXELS_PER_BLOCK;

		if ( size != NULL )
		{
			*size = w_aligned * h_aligned * pixel_size +
					GRALLOC_ALIGN( nblocks * AFBC_HEADER_BUFFER_BYTES_PER_BLOCKENTRY, buffer_byte_alignment );
		}
	}
}

/*
 * Computes the strides and size for an AFBC 8BIT YUV 4:2:0 buffer
 *
 * width                Public known width of the buffer in pixels
 * height               Public known height of the buffer in pixels
 *
 * pixel_stride   (out) stride of the buffer in pixels
 * byte_stride    (out) stride of the buffer in bytes
 * size           (out) size of the buffer in bytes
 * type                 if buffer should be allocated for a certain afbc type
 * internalHeight (out) The internal height, which may be greater than the public known height.
 */
static bool get_afbc_yuv420_8bit_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride,
                                                 size_t* size, AllocType type, int *internalHeight)
{
	int yuv420_afbc_luma_stride, yuv420_afbc_chroma_stride;
	int buffer_byte_alignment = AFBC_BODY_BUFFER_BYTE_ALIGNMENT;

	*internalHeight = height;

#if MALI_VIDEO_VERSION != 0

	/* If we have a greater internal height than public we set the internalHeight. This
	 * implies that cropping will be applied of internal dimensions to fit the public one.
	 *
	 * NOTE: This should really only be done when the producer is determined to be VPU decoder.
	 */
	*internalHeight += AFBC_PIXELS_PER_BLOCK;
#endif

	/* The actual height used in size calculation must include the possible extra row. But
	 * it must also be AFBC-aligned. Only the extra row-padding should be reported back in
	 * internalHeight. This as only this row needs to be considered when cropping. */

	if (type == UNCOMPRESSED)
	{
		AERR(" Buffer must be allocated with AFBC mode for internal pixel format YUV420_8BIT_AFBC!");
		return false;
	}
	else if (type == AFBC_TILED_HEADERS_BASIC)
	{
		width = GRALLOC_ALIGN( width, AFBC_TILED_HEADERS_BASIC_WIDTH_ALIGN );
		height = GRALLOC_ALIGN( *internalHeight, AFBC_TILED_HEADERS_BASIC_HEIGHT_ALIGN );
		buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
	}
	else if (type == AFBC_TILED_HEADERS_WIDEBLK)
	{
		width = GRALLOC_ALIGN( width, AFBC_TILED_HEADERS_WIDEBLK_WIDTH_ALIGN );
		height = GRALLOC_ALIGN( *internalHeight, AFBC_TILED_HEADERS_WIDEBLK_HEIGHT_ALIGN );
		buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
	}
	else if (type == AFBC_PADDED)
	{
		AERR("GRALLOC_USAGE_PRIVATE_2 (64byte header row alignment for AFBC) is not supported for YUV");
		return false;
	}
	else if (type == AFBC_WIDEBLK)
	{
		width = GRALLOC_ALIGN(width, AFBC_WIDEBLK_WIDTH_ALIGN);
		height = GRALLOC_ALIGN( *internalHeight, AFBC_WIDEBLK_HEIGHT_ALIGN );
	}
	else
	{
		width = GRALLOC_ALIGN(width, AFBC_NORMAL_WIDTH_ALIGN);
		height = GRALLOC_ALIGN( *internalHeight, AFBC_NORMAL_HEIGHT_ALIGN );
	}

	yuv420_afbc_luma_stride = width;
	yuv420_afbc_chroma_stride = GRALLOC_ALIGN(yuv420_afbc_luma_stride / 2, 16); /* Horizontal downsampling*/

	if (size != NULL)
	{
		int nblocks = width / AFBC_PIXELS_PER_BLOCK * height / AFBC_PIXELS_PER_BLOCK;
		/* Simplification of (height * luma-stride + 2 * (height /2 * chroma_stride) */
		*size =
		    ( yuv420_afbc_luma_stride + yuv420_afbc_chroma_stride ) * height +
		    GRALLOC_ALIGN( nblocks * AFBC_HEADER_BUFFER_BYTES_PER_BLOCKENTRY, buffer_byte_alignment );
	}

	if (byte_stride != NULL)
	{
		*byte_stride = yuv420_afbc_luma_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = yuv420_afbc_luma_stride;
	}

	return true;
}

/*
 * Computes the strides and size for an YV12 buffer
 *
 * width                  Public known width of the buffer in pixels
 * height                 Public known height of the buffer in pixels
 *
 * pixel_stride     (out) stride of the buffer in pixels
 * byte_stride      (out) stride of the buffer in bytes
 * size             (out) size of the buffer in bytes
 * type             (in)  if buffer should be allocated for a certain afbc type
 * internalHeight   (out) The internal height, which may be greater than the public known height.
 * stride_alignment (in)  stride aligment value in bytes.
 */
static bool get_yv12_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride, size_t* size,
                                     AllocType type, int* internalHeight, int stride_alignment)
{
	int luma_stride;

	if (type != UNCOMPRESSED)
	{
		return get_afbc_yuv420_8bit_stride_and_size(width, height, pixel_stride, byte_stride, size, type, internalHeight);
	}

	/* 4:2:0 formats must have buffers with even height and width as the clump size is 2x2 pixels.
	 * Width will be even stride aligned anyway so just adjust height here for size calculation. */
	height = GRALLOC_ALIGN(height, 2);

	luma_stride = GRALLOC_ALIGN(width, stride_alignment);

	if (size != NULL)
	{
		int chroma_stride = GRALLOC_ALIGN(luma_stride / 2, stride_alignment);
		/* Simplification of ((height * luma_stride ) + 2 * ((height / 2) * chroma_stride)). */
		*size = height * (luma_stride + chroma_stride);
	}

	if (byte_stride != NULL)
	{
		*byte_stride = luma_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = luma_stride;
	}

	return true;
}
/*
 * Computes the strides and size for an 8 bit YUYV 422 buffer
 *
 * width                  Public known width of the buffer in pixels
 * height                 Public known height of the buffer in pixels
 *
 * pixel_stride     (out) stride of the buffer in pixels
 * byte_stride      (out) stride of the buffer in bytes
 * size             (out) size of the buffer in bytes
 */
static bool get_yuv422_8bit_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride, size_t* size)
{
	int local_byte_stride, local_pixel_stride;

	/* 4:2:2 formats must have buffers with even width as the clump size is 2x1 pixels.
	 * This is taken care of by the even stride alignment. */

	local_pixel_stride = GRALLOC_ALIGN(width, YUV_MALI_PLANE_ALIGN);
	local_byte_stride  = GRALLOC_ALIGN(width * 2, YUV_MALI_PLANE_ALIGN); /* 4 bytes per 2 pixels */

	if (size != NULL)
	{
		*size = local_byte_stride * height;
	}

	if (byte_stride != NULL)
	{
		*byte_stride = local_byte_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = local_pixel_stride;
	}

	return true;
}

/*
 * Computes the strides and size for an AFBC 8BIT YUV 4:2:2 buffer
 *
 * width               width of the buffer in pixels
 * height              height of the buffer in pixels
 *
 * pixel_stride (out)  stride of the buffer in pixels
 * byte_stride  (out)  stride of the buffer in bytes
 * size         (out)  size of the buffer in bytes
 * type                if buffer should be allocated for a certain afbc type
 */
static bool get_afbc_yuv422_8bit_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride, size_t* size, AllocType type)
{
	int yuv422_afbc_luma_stride;
	int buffer_byte_alignment = AFBC_BODY_BUFFER_BYTE_ALIGNMENT;

	if (type == UNCOMPRESSED)
	{
		AERR(" Buffer must be allocated with AFBC mode for internal pixel format YUV422_8BIT_AFBC!");
		return false;
	}
	else if (type == AFBC_TILED_HEADERS_BASIC)
	{
		width = GRALLOC_ALIGN(width, AFBC_TILED_HEADERS_BASIC_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(height, AFBC_TILED_HEADERS_BASIC_HEIGHT_ALIGN);
		buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
	}
	else if (type == AFBC_TILED_HEADERS_WIDEBLK)
	{
		width = GRALLOC_ALIGN(width, AFBC_TILED_HEADERS_WIDEBLK_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(height, AFBC_TILED_HEADERS_WIDEBLK_HEIGHT_ALIGN);
		buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
	}
	else if (type == AFBC_PADDED)
	{
		AERR("GRALLOC_USAGE_PRIVATE_2 (64byte header row alignment for AFBC) is not supported for YUV");
		return false;
	}
	else if (type == AFBC_WIDEBLK)
	{
		width = GRALLOC_ALIGN(width, AFBC_WIDEBLK_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(height, AFBC_WIDEBLK_HEIGHT_ALIGN);
	}
	else
	{
		width = GRALLOC_ALIGN(width, AFBC_NORMAL_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(height, AFBC_NORMAL_HEIGHT_ALIGN);
	}

	yuv422_afbc_luma_stride = width;

	if (size != NULL)
	{
		int nblocks = width / AFBC_PIXELS_PER_BLOCK * height / AFBC_PIXELS_PER_BLOCK;
		/* YUV 4:2:2 luma size equals chroma size */
		*size = yuv422_afbc_luma_stride * height * 2
			+ GRALLOC_ALIGN(nblocks * AFBC_HEADER_BUFFER_BYTES_PER_BLOCKENTRY, buffer_byte_alignment);
	}

	if (byte_stride != NULL)
	{
		*byte_stride = yuv422_afbc_luma_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = yuv422_afbc_luma_stride;
	}

	return true;
}

/*
 * Calculate strides and sizes for a P010 (Y-UV 4:2:0) or P210 (Y-UV 4:2:2) buffer.
 *
 * @param width         [in]    Buffer width.
 * @param height        [in]    Buffer height.
 * @param vss           [in]    Vertical sub-sampling factor (2 for P010, 1 for
 *                              P210. Anything else is invalid).
 * @param pixel_stride  [out]   Pixel stride; number of pixels between
 *                              consecutive rows.
 * @param byte_stride   [out]   Byte stride; number of bytes between
 *                              consecutive rows.
 * @param size          [out]   Size of the buffer in bytes. Cumulative sum of
 *                              sizes of all planes.
 *
 * @return true if the calculation was successful; false otherwise (invalid
 * parameter)
 */
static bool get_yuv_pX10_stride_and_size(int width, int height, int vss, int* pixel_stride, int* byte_stride, size_t* size)
{
	int luma_pixel_stride, luma_byte_stride;

	if (vss < 1 || vss > 2)
	{
		AERR("Invalid vertical sub-sampling factor: %d, should be 1 or 2", vss);
		return false;
	}

	/* 4:2:2 must have even width as the clump size is 2x1 pixels. This will be taken care of by the
	 * even stride alignment */
	if (vss == 2)
	{
		/* 4:2:0 must also have even height as the clump size is 2x2 */
		height = GRALLOC_ALIGN(height, 2);
	}

	luma_pixel_stride = GRALLOC_ALIGN(width, YUV_MALI_PLANE_ALIGN);
	luma_byte_stride  = GRALLOC_ALIGN(width * 2, YUV_MALI_PLANE_ALIGN);

	if (size != NULL)
	{
		int chroma_size = GRALLOC_ALIGN(width * 2, YUV_MALI_PLANE_ALIGN) * (height / vss);
		*size = luma_byte_stride * height + chroma_size;
	}

	if (byte_stride != NULL)
	{
		*byte_stride = luma_byte_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = luma_pixel_stride;
	}

	return true;
}

/*
 *  Calculate strides and strides for Y210 (10 bit YUYV packed, 4:2:2) format buffer.
 *
 * @param width         [in]    Buffer width.
 * @param height        [in]    Buffer height.
 * @param pixel_stride  [out]   Pixel stride; number of pixels between
 *                              consecutive rows.
 * @param byte_stride   [out]   Byte stride; number of bytes between
 *                              consecutive rows.
 * @param size          [out]   Size of the buffer in bytes. Cumulative sum of
 *                              sizes of all planes.
 *
 * @return true if the calculation was successful; false otherwise (invalid
 * parameter)
 */
static bool get_yuv_y210_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride, size_t* size)
{
	int y210_byte_stride, y210_pixel_stride;

	/* 4:2:2 formats must have buffers with even width as the clump size is 2x1 pixels.
	 * This is taken care of by the even stride alignment */

	y210_pixel_stride = GRALLOC_ALIGN(width, YUV_MALI_PLANE_ALIGN);
	/* 4x16 bits per 2 pixels */
	y210_byte_stride  = GRALLOC_ALIGN(width * 4, YUV_MALI_PLANE_ALIGN);

	if (size != NULL)
	{
		*size = y210_byte_stride * height;
	}

	if (byte_stride != NULL)
	{
		*byte_stride = y210_byte_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = y210_pixel_stride;
	}

	return true;
}

/*
 *  Calculate strides and strides for Y0L2 (YUYAAYVYAA, 4:2:0) format buffer.
 *
 * @param width         [in]    Buffer width.
 * @param height        [in]    Buffer height.
 * @param pixel_stride  [out]   Pixel stride; number of pixels between
 *                              consecutive rows.
 * @param byte_stride   [out]   Byte stride; number of bytes between
 *                              consecutive rows.
 * @param size          [out]   Size of the buffer in bytes. Cumulative sum of
 *                              sizes of all planes.
 *
 * @return true if the calculation was successful; false otherwise (invalid
 * parameter)
 *
 * @note Each YUYAAYVYAA clump encodes a 2x2 area of pixels. YU&V are 10 bits. A is 1 bit. total 8 bytes
 *
 */
static bool get_yuv_y0l2_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride, size_t* size)
{
	int y0l2_byte_stride, y0l2_pixel_stride;

	/* 4:2:0 formats must have buffers with even height and width as the clump size is 2x2 pixels.
	 * Width is take care of by the even stride alignment so just adjust height here for size calculation. */
	height = GRALLOC_ALIGN(height, 2);

	y0l2_pixel_stride = GRALLOC_ALIGN(width, YUV_MALI_PLANE_ALIGN);
	y0l2_byte_stride  = GRALLOC_ALIGN(width * 4, YUV_MALI_PLANE_ALIGN); /* 2 horiz pixels per 8 byte clump */

	if (size != NULL)
	{
		*size = y0l2_byte_stride * height / 2; /* byte stride covers 2 vert pixels */
	}

	if (byte_stride != NULL)
	{
		*byte_stride = y0l2_byte_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = y0l2_pixel_stride;
	}
	return true;
}
/*
 *  Calculate strides and strides for Y410 (AVYU packed, 4:4:4) format buffer.
 *
 * @param width         [in]    Buffer width.
 * @param height        [in]    Buffer height.
 * @param pixel_stride  [out]   Pixel stride; number of pixels between
 *                              consecutive rows.
 * @param byte_stride   [out]   Byte stride; number of bytes between
 *                              consecutive rows.
 * @param size          [out]   Size of the buffer in bytes. Cumulative sum of
 *                              sizes of all planes.
 *
 * @return true if the calculation was successful; false otherwise (invalid
 * parameter)
 */
static bool get_yuv_y410_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride, size_t* size)
{
	int y410_byte_stride, y410_pixel_stride;

	y410_pixel_stride = GRALLOC_ALIGN(width, YUV_MALI_PLANE_ALIGN);
	y410_byte_stride  = GRALLOC_ALIGN(width * 4, YUV_MALI_PLANE_ALIGN);

	if (size != NULL)
	{
		/* 4x8bits per pixel */
		*size = y410_byte_stride * height;
	}

	if (byte_stride != NULL)
	{
		*byte_stride = y410_byte_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = y410_pixel_stride;
	}
	return true;
}

/*
 *  Calculate strides and strides for YUV420_10BIT_AFBC (Compressed, 4:2:0) format buffer.
 *
 * @param width         [in]    Buffer width.
 * @param height        [in]    Buffer height.
 * @param pixel_stride  [out]   Pixel stride; number of pixels between
 *                              consecutive rows.
 * @param byte_stride   [out]   Byte stride; number of bytes between
 *                              consecutive rows.
 * @param size          [out]   Size of the buffer in bytes. Cumulative sum of
 *                              sizes of all planes.
 * @param type          [in]    afbc mode that buffer should be allocated with.
 *
 * @param internalHeight [out]  Internal buffer height that used by consumer or producer
 *
 * @return true if the calculation was successful; false otherwise (invalid
 * parameter)
 */
static bool get_yuv420_10bit_afbc_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride, size_t* size, AllocType type, int* internalHeight)
{
	int yuv420_afbc_byte_stride, yuv420_afbc_pixel_stride;
	int buffer_byte_alignment = AFBC_BODY_BUFFER_BYTE_ALIGNMENT;

	if (width & 3)
	{
		return false;
	}

        *internalHeight = height;
#if MALI_VIDEO_VERSION
	/* If we have a greater internal height than public we set the internalHeight. This
	 * implies that cropping will be applied of internal dimensions to fit the public one. */
        *internalHeight += AFBC_PIXELS_PER_BLOCK;
#endif
	/* The actual height used in size calculation must include the possible extra row. But
	 * it must also be AFBC-aligned. Only the extra row-padding should be reported back in
	 * internalHeight. This as only this row needs to be considered when cropping. */
	if (type == UNCOMPRESSED)
	{
		AERR(" Buffer must be allocated with AFBC mode for internal pixel format YUV420_10BIT_AFBC!");
		return false;
	}
	else if (type == AFBC_TILED_HEADERS_BASIC)
	{
		width = GRALLOC_ALIGN(width, AFBC_TILED_HEADERS_BASIC_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(*internalHeight/2, AFBC_TILED_HEADERS_BASIC_HEIGHT_ALIGN);
		buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
	}
	else if (type == AFBC_TILED_HEADERS_WIDEBLK)
	{
		width = GRALLOC_ALIGN(width, AFBC_TILED_HEADERS_WIDEBLK_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(*internalHeight/2, AFBC_TILED_HEADERS_WIDEBLK_HEIGHT_ALIGN);
		buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
	}
	else if (type == AFBC_PADDED)
	{
		AERR("GRALLOC_USAGE_PRIVATE_2 (64byte header row alignment for AFBC) is not supported for YUV");
		return false;
	}
	else if (type == AFBC_WIDEBLK)
	{
		width = GRALLOC_ALIGN(width, AFBC_WIDEBLK_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(*internalHeight/2, AFBC_WIDEBLK_HEIGHT_ALIGN);
	}
	else
	{
		width = GRALLOC_ALIGN(width, AFBC_NORMAL_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(*internalHeight/2, AFBC_NORMAL_HEIGHT_ALIGN);
	}

	yuv420_afbc_pixel_stride = GRALLOC_ALIGN(width, 16);
	yuv420_afbc_byte_stride  = GRALLOC_ALIGN(width * 4, 16); /* 64-bit packed and horizontally downsampled */

	if (size != NULL)
	{
		int nblocks = width / AFBC_PIXELS_PER_BLOCK * (*internalHeight) / AFBC_PIXELS_PER_BLOCK;
		*size = yuv420_afbc_byte_stride * height
			+ GRALLOC_ALIGN(nblocks * AFBC_HEADER_BUFFER_BYTES_PER_BLOCKENTRY, buffer_byte_alignment);
	}

	if (byte_stride != NULL)
	{
		*byte_stride = yuv420_afbc_pixel_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = yuv420_afbc_pixel_stride;
	}

	return true;
}

/*
 *  Calculate strides and strides for YUV422_10BIT_AFBC (Compressed, 4:2:2) format buffer.
 *
 * @param width         [in]    Buffer width.
 * @param height        [in]    Buffer height.
 * @param pixel_stride  [out]   Pixel stride; number of pixels between
 *                              consecutive rows.
 * @param byte_stride   [out]   Byte stride; number of bytes between
 *                              consecutive rows.
 * @param size          [out]   Size of the buffer in bytes. Cumulative sum of
 *                              sizes of all planes.
 * @param type          [in]    afbc mode that buffer should be allocated with.
 *
 * @return true if the calculation was successful; false otherwise (invalid
 * parameter)
 */
static bool get_yuv422_10bit_afbc_stride_and_size(int width, int height, int* pixel_stride, int* byte_stride, size_t* size, AllocType type)
{
	int yuv422_afbc_byte_stride, yuv422_afbc_pixel_stride;
	int buffer_byte_alignment = AFBC_BODY_BUFFER_BYTE_ALIGNMENT;

	if (width & 3)
	{
		return false;
	}

	if (type == UNCOMPRESSED)
	{
		AERR(" Buffer must be allocated with AFBC mode for internal pixel format YUV422_10BIT_AFBC!");
		return false;
	}
	else if (type == AFBC_TILED_HEADERS_BASIC)
	{
		width = GRALLOC_ALIGN(width, AFBC_TILED_HEADERS_BASIC_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(height, AFBC_TILED_HEADERS_BASIC_HEIGHT_ALIGN);
		buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
	}
	else if (type == AFBC_TILED_HEADERS_WIDEBLK)
	{
		width = GRALLOC_ALIGN(width, AFBC_TILED_HEADERS_WIDEBLK_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(height, AFBC_TILED_HEADERS_WIDEBLK_HEIGHT_ALIGN);
		buffer_byte_alignment = 4 * AFBC_BODY_BUFFER_BYTE_ALIGNMENT;
	}
	else if (type == AFBC_PADDED)
	{
		AERR("GRALLOC_USAGE_PRIVATE_2 (64byte header row alignment for AFBC) is not supported for YUV");
		return false;
	}
	else if (type == AFBC_WIDEBLK)
	{
		width = GRALLOC_ALIGN(width, AFBC_WIDEBLK_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(height, AFBC_WIDEBLK_HEIGHT_ALIGN);
	}
	else
	{
		width = GRALLOC_ALIGN(width, AFBC_NORMAL_WIDTH_ALIGN);
		height = GRALLOC_ALIGN(height, AFBC_NORMAL_HEIGHT_ALIGN);
	}

	yuv422_afbc_pixel_stride = GRALLOC_ALIGN(width, 16);
	yuv422_afbc_byte_stride  = GRALLOC_ALIGN(width * 2, 16);

	if (size != NULL)
	{
		int nblocks = width / AFBC_PIXELS_PER_BLOCK * height / AFBC_PIXELS_PER_BLOCK;
		/* YUV 4:2:2 chroma size equals to luma size */
		*size = yuv422_afbc_byte_stride * height * 2
			+ GRALLOC_ALIGN(nblocks * AFBC_HEADER_BUFFER_BYTES_PER_BLOCKENTRY, buffer_byte_alignment);
	}

	if (byte_stride != NULL)
	{
		*byte_stride = yuv422_afbc_byte_stride;
	}

	if (pixel_stride != NULL)
	{
		*pixel_stride = yuv422_afbc_pixel_stride;
	}

	return true;
}

/*
 *  Calculate strides and strides for Camera RAW and Blob formats
 *
 * @param w             [in]    Buffer width.
 * @param h             [in]    Buffer height.
 * @param format        [in]    Requested HAL format
 * @param out_stride    [out]   Pixel stride; number of pixels/bytes between
 *                              consecutive rows. Format description calls for
 *                              either bytes or pixels.
 * @param size          [out]   Size of the buffer in bytes. Cumulative sum of
 *                              sizes of all planes.
 *
 * @return true if the calculation was successful; false otherwise (invalid
 * parameter)
 */
static bool get_camera_formats_stride_and_size(int w, int h, uint64_t format, int *out_stride, size_t *out_size)
{
	int stride, size;

	switch (format)
	{
		case HAL_PIXEL_FORMAT_RAW16:
			stride = w; /* Format assumes stride in pixels */
			stride = GRALLOC_ALIGN(stride, 16); /* Alignment mandated by Android */
			size = stride * h * 2; /* 2 bytes per pixel */
			break;

		case HAL_PIXEL_FORMAT_RAW12:
			if (w % 4 != 0)
			{
				ALOGE("ERROR: Width for HAL_PIXEL_FORMAT_RAW12 buffers has to be multiple of 4.");
				return false;
			}
			stride = (w / 2) * 3; /* Stride in bytes; 2 pixels in 3 bytes */
			size = stride * h;
			break;

		case HAL_PIXEL_FORMAT_RAW10:
			if (w % 4 != 0)
			{
				ALOGE("ERROR: Width for HAL_PIXEL_FORMAT_RAW10 buffers has to be multiple of 4.");
				return false;
			}
			stride = (w / 4) * 5; /* Stride in bytes; 4 pixels in 5 bytes */
			size = stride * h;
			break;

		case HAL_PIXEL_FORMAT_BLOB:
			if (h != 1)
			{
				ALOGE("ERROR: Height for HAL_PIXEL_FORMAT_BLOB must be 1.");
				return false;
			}
			stride = 0; /* No 'rows', it's effectively a long one dimensional array */
			size = w;
			break;

		default:
			return false;

	}

	if (out_size != NULL)
	{
		*out_size = size;
	}

	if (out_stride != NULL)
	{
		*out_stride = stride;
	}

	return true;
}

static int alloc_device_alloc(alloc_device_t* dev, int w, int h, int format, int usage, buffer_handle_t* pHandle, int* pStride)
{

	if (!pHandle || !pStride)
	{
		return -EINVAL;
	}

	size_t size;       // Size to be allocated for the buffer
	int byte_stride;   // Stride of the buffer in bytes
	int pixel_stride;  // Stride of the buffer in pixels - as returned in pStride
	uint64_t internal_format;
	AllocType type = UNCOMPRESSED;
	int internalWidth,internalHeight;

#if GRALLOC_FB_SWAP_RED_BLUE == 1
	/* match the framebuffer format */
	if (usage & GRALLOC_USAGE_HW_FB)
	{
#ifdef GRALLOC_16_BITS
		format = HAL_PIXEL_FORMAT_RGB_565;
#else
		format = HAL_PIXEL_FORMAT_BGRA_8888;
#endif
	}
#endif

	/* Some formats require an internal width and height that may be used by
	 * consumers/producers.
	 */
	internalWidth = w;
	internalHeight = h;

	internal_format = mali_gralloc_select_format(format, usage, w*h);
	if(internal_format == 0)
	{
		ALOGE("Unrecognized and/or unsupported format(0x%08X) and usage(0x%08X).",format,usage);
		return -EINVAL;
	}

	if (internal_format & MALI_GRALLOC_INTFMT_AFBCENABLE_MASK)
	{
		if (internal_format & MALI_GRALLOC_INTFMT_AFBC_TILED_HEADERS)
		{
			if (internal_format & MALI_GRALLOC_INTFMT_AFBC_WIDEBLK)
			{
				type = AFBC_TILED_HEADERS_WIDEBLK;
			}
			else if (internal_format & MALI_GRALLOC_INTFMT_AFBC_BASIC)
			{
				type = AFBC_TILED_HEADERS_BASIC;
			}
			else if (internal_format & MALI_GRALLOC_INTFMT_AFBC_SPLITBLK)
			{
				ALOGE("Unsupported format. Splitblk in tiled header configuration.");
				return -EINVAL;
			}
		}
		else if (usage & MALI_GRALLOC_USAGE_AFBC_PADDING)
		{
			type = AFBC_PADDED;
		}
		else if (internal_format & MALI_GRALLOC_INTFMT_AFBC_WIDEBLK)
		{
			type = AFBC_WIDEBLK;
		}
		else
		{
			type = AFBC;
		}
	}

	uint64_t base_format = internal_format & MALI_GRALLOC_INTFMT_FMT_MASK;
	switch (base_format)
	{
		case HAL_PIXEL_FORMAT_RGBA_8888:
		case HAL_PIXEL_FORMAT_RGBX_8888:
		case HAL_PIXEL_FORMAT_BGRA_8888:
			get_rgb_stride_and_size(w, h, 4, &pixel_stride, &byte_stride, &size, type );
			break;
		case HAL_PIXEL_FORMAT_RGB_888:
			get_rgb_stride_and_size(w, h, 3, &pixel_stride, &byte_stride, &size, type );
			break;
		case HAL_PIXEL_FORMAT_RGB_565:
			get_rgb_stride_and_size(w, h, 2, &pixel_stride, &byte_stride, &size, type );
			break;

		case HAL_PIXEL_FORMAT_YCrCb_420_SP:
		case MALI_GRALLOC_FORMAT_INTERNAL_YV12:
		case MALI_GRALLOC_FORMAT_INTERNAL_NV12:
		case MALI_GRALLOC_FORMAT_INTERNAL_NV21:
		{
			/* Mali subsystem prefers higher stride alignment values (128 bytes) for YUV, but software components assume
			 * default of 16. We only need to care about YV12 as it's the only, implicit, HAL YUV format in Android.
			 */
			int yv12_align = YUV_MALI_PLANE_ALIGN;
			if(usage & (GRALLOC_USAGE_SW_READ_MASK | GRALLOC_USAGE_SW_WRITE_MASK))
			{
				yv12_align = YUV_ANDROID_PLANE_ALIGN;
			}

			if (!get_yv12_stride_and_size(w, h, &pixel_stride, &byte_stride, &size, type,
										  &internalHeight, yv12_align))
			{
				return -EINVAL;
			}
			break;
		}
		case HAL_PIXEL_FORMAT_YCbCr_422_I:
		{
			/* YUYV 4:2:2 */
			if (type != UNCOMPRESSED || !get_yuv422_8bit_stride_and_size(w, h, &pixel_stride, &byte_stride, &size))
			{
				return -EINVAL;
			}
			break;
		}
		case HAL_PIXEL_FORMAT_RAW16:
		case HAL_PIXEL_FORMAT_RAW12:
		case HAL_PIXEL_FORMAT_RAW10:
		case HAL_PIXEL_FORMAT_BLOB:
			if (type != UNCOMPRESSED)
			{
				return -EINVAL;
			}
			get_camera_formats_stride_and_size(w, h, base_format, &pixel_stride, &size);
			byte_stride = pixel_stride; /* For Raw/Blob formats stride is defined to be either in bytes or pixels per format */
			break;

		case MALI_GRALLOC_FORMAT_INTERNAL_Y0L2:
			/* YUYAAYUVAA 4:2:0 with and without AFBC */
			if (type != UNCOMPRESSED)
			{
				if (!get_yuv420_10bit_afbc_stride_and_size(w, h, &pixel_stride, &byte_stride, &size, type, &internalHeight))
				{
					return -EINVAL;
				}
			}
			else
			{
				if(!get_yuv_y0l2_stride_and_size(w, h, &pixel_stride, &byte_stride, &size))
				{
					return -EINVAL;
				}
			}
			break;

		case MALI_GRALLOC_FORMAT_INTERNAL_P010:
			/* Y-UV 4:2:0 */
			if (type != UNCOMPRESSED || !get_yuv_pX10_stride_and_size(w, h, 2, &pixel_stride, &byte_stride, &size))
			{
				return -EINVAL;
			}
			break;

		case MALI_GRALLOC_FORMAT_INTERNAL_P210:
			/* Y-UV 4:2:2 */
			if (type != UNCOMPRESSED || !get_yuv_pX10_stride_and_size(w, h, 1, &pixel_stride, &byte_stride, &size))
			{
				return -EINVAL;
			}
			break;

		case MALI_GRALLOC_FORMAT_INTERNAL_Y210:
			/* YUYV 4:2:2 with and without AFBC */
			if (type != UNCOMPRESSED)
			{
				if (!get_yuv422_10bit_afbc_stride_and_size(w, h, &pixel_stride, &byte_stride, &size, type))
				{
					return -EINVAL;
				}
			}
			else
			{
				if(!get_yuv_y210_stride_and_size(w, h, &pixel_stride, &byte_stride, &size))
				{
					return -EINVAL;
				}
			}
			break;

		case MALI_GRALLOC_FORMAT_INTERNAL_Y410:
			/* AVYU 2-10-10-10 */
			if (type != UNCOMPRESSED || !get_yuv_y410_stride_and_size(w, h, &pixel_stride, &byte_stride, &size))
			{
				return -EINVAL;
			}
			break;

		case MALI_GRALLOC_FORMAT_INTERNAL_YUV422_8BIT:
			/* 8BIT AFBC YUV4:2:2 testing usage */

			 /* We only support compressed for this format right now.
			  * Below will fail in case format is uncompressed.
			  */
			if (!get_afbc_yuv422_8bit_stride_and_size(w, h, &pixel_stride, &byte_stride, &size, type))
			{
				return -EINVAL;
			}
			break;
			/*
			 * Additional custom formats can be added here
			 * and must fill the variables pixel_stride, byte_stride and size.
			 */
		default:
			return -EINVAL;
	}

	int err;
#if DISABLE_FRAMEBUFFER_HAL != 1
	if (usage & GRALLOC_USAGE_HW_FB)
	{
		err = gralloc_alloc_framebuffer(dev, size, usage, pHandle, &pixel_stride, &byte_stride);
	}
	else
#endif
	{
		err = alloc_backend_alloc(dev, size, usage, pHandle, internal_format, w, h);
	}

	if (err < 0)
	{
		return err;
	}

	private_handle_t *hnd = (private_handle_t *)*pHandle;

	err = gralloc_buffer_attr_allocate( hnd );
	if( err < 0 )
	{
		private_module_t* m = reinterpret_cast<private_module_t*>(dev->common.module);

		if ( (usage & GRALLOC_USAGE_HW_FB) )
		{
			/*
			 * Having the attribute region is not critical for the framebuffer so let it pass.
			 */
			err = 0;
		}
		else
		{
			alloc_backend_alloc_free( hnd, m );
			return err;
		}
	}

	hnd->req_format = format;
	hnd->byte_stride = byte_stride;
	hnd->internal_format = internal_format;

	int private_usage = usage & MALI_GRALLOC_USAGE_YUV_CONF_MASK;

	switch (private_usage)
	{
		case MALI_GRALLOC_USAGE_YUV_CONF_0:
			hnd->yuv_info = MALI_YUV_BT601_NARROW;
			break;
		case MALI_GRALLOC_USAGE_YUV_CONF_1:
			hnd->yuv_info = MALI_YUV_BT601_WIDE;
			break;
		case MALI_GRALLOC_USAGE_YUV_CONF_2:
			hnd->yuv_info = MALI_YUV_BT709_NARROW;
			break;
		case MALI_GRALLOC_USAGE_YUV_CONF_3:
			hnd->yuv_info = MALI_YUV_BT709_WIDE;
			break;
	}

	/* Workaround 10bit YUV only support BT709_WIDE in GPU DDK */
	if ((hnd->internal_format & MALI_GRALLOC_INTFMT_FMT_MASK) == MALI_GRALLOC_FORMAT_INTERNAL_Y0L2)
	{
		hnd->yuv_info = MALI_YUV_BT709_WIDE;
	}
	hnd->width = w;
	hnd->height = h;
	hnd->stride = pixel_stride;
	hnd->internalWidth = internalWidth;
	hnd->internalHeight = internalHeight;

	*pStride = pixel_stride;
	return 0;
}

static int alloc_device_free(alloc_device_t* dev, buffer_handle_t handle)
{
	if (private_handle_t::validate(handle) < 0)
	{
		return -EINVAL;
	}

	private_handle_t const* hnd = reinterpret_cast<private_handle_t const*>(handle);
	private_module_t* m = reinterpret_cast<private_module_t*>(dev->common.module);

	if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)
	{
		// free this buffer
		private_module_t* m = reinterpret_cast<private_module_t*>(dev->common.module);
		const size_t bufferSize = m->finfo.line_length * m->info.yres;
		int index = ((uintptr_t)hnd->base - (uintptr_t)m->framebuffer->base) / bufferSize;
		m->bufferMask &= ~(1 << index);
		close(hnd->fd);
	}

	gralloc_buffer_attr_free( (private_handle_t *) hnd );
	alloc_backend_alloc_free(hnd, m);

	delete hnd;

	return 0;
}

int alloc_device_open(hw_module_t const* module, const char* name, hw_device_t** device)
{
	alloc_device_t *dev;

	GRALLOC_UNUSED(name);

	dev = new alloc_device_t;
	if (NULL == dev)
	{
		return -1;
	}

	/* initialize our state here */
	memset(dev, 0, sizeof(*dev));

	/* initialize the procs */
	dev->common.tag = HARDWARE_DEVICE_TAG;
	dev->common.version = 0;
	dev->common.module = const_cast<hw_module_t*>(module);
	dev->common.close = alloc_backend_close;
	dev->alloc = alloc_device_alloc;
	dev->free = alloc_device_free;

	if (0 != alloc_backend_open(dev)) {
		delete dev;
		return -1;
	}

	*device = &dev->common;

	return 0;
}