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/*
* Copyright (C) 2011 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.
*/
/**
******************************************************************************
* @file M4VIFI_RGB565toYUV420.c
* @brief Contain video library function
* @note Color Conversion Filter
* -# Contains the format conversion filters from RGB565 to YUV420
******************************************************************************
*/
/* Prototypes of functions, and type definitions */
#include "M4VIFI_FiltersAPI.h"
/* Macro definitions */
#include "M4VIFI_Defines.h"
/* Clip table declaration */
#include "M4VIFI_Clip.h"
/**
******************************************************************************
* M4VIFI_UInt8 M4VIFI_RGB565toYUV420 (void *pUserData,
* M4VIFI_ImagePlane *pPlaneIn,
* M4VIFI_ImagePlane *pPlaneOut)
* @brief transform RGB565 image to a YUV420 image.
* @note Convert RGB565 to YUV420,
* Loop on each row ( 2 rows by 2 rows )
* Loop on each column ( 2 col by 2 col )
* Get 4 RGB samples from input data and build 4 output Y samples
* and each single U & V data
* end loop on col
* end loop on row
* @param pUserData: (IN) User Specific Data
* @param pPlaneIn: (IN) Pointer to RGB565 Plane
* @param pPlaneOut: (OUT) Pointer to YUV420 buffer Plane
* @return M4VIFI_OK: there is no error
* @return M4VIFI_ILLEGAL_FRAME_HEIGHT: YUV Plane height is ODD
* @return M4VIFI_ILLEGAL_FRAME_WIDTH: YUV Plane width is ODD
******************************************************************************
*/
M4VIFI_UInt8 M4VIFI_xVSS_RGB565toYUV420(void *pUserData, M4VIFI_ImagePlane *pPlaneIn,
M4VIFI_ImagePlane *pPlaneOut)
{
M4VIFI_UInt32 u32_width, u32_height;
M4VIFI_UInt32 u32_stride_Y, u32_stride2_Y, u32_stride_U, u32_stride_V;
M4VIFI_UInt32 u32_stride_rgb, u32_stride_2rgb;
M4VIFI_UInt32 u32_col, u32_row;
M4VIFI_Int32 i32_r00, i32_r01, i32_r10, i32_r11;
M4VIFI_Int32 i32_g00, i32_g01, i32_g10, i32_g11;
M4VIFI_Int32 i32_b00, i32_b01, i32_b10, i32_b11;
M4VIFI_Int32 i32_y00, i32_y01, i32_y10, i32_y11;
M4VIFI_Int32 i32_u00, i32_u01, i32_u10, i32_u11;
M4VIFI_Int32 i32_v00, i32_v01, i32_v10, i32_v11;
M4VIFI_UInt8 *pu8_yn, *pu8_ys, *pu8_u, *pu8_v;
M4VIFI_UInt8 *pu8_y_data, *pu8_u_data, *pu8_v_data;
M4VIFI_UInt8 *pu8_rgbn_data, *pu8_rgbn;
M4VIFI_UInt16 u16_pix1, u16_pix2, u16_pix3, u16_pix4;
M4VIFI_UInt8 count_null=0;
/* Check planes height are appropriate */
if( (pPlaneIn->u_height != pPlaneOut[0].u_height) ||
(pPlaneOut[0].u_height != (pPlaneOut[1].u_height<<1)) ||
(pPlaneOut[0].u_height != (pPlaneOut[2].u_height<<1)))
{
return M4VIFI_ILLEGAL_FRAME_HEIGHT;
}
/* Check planes width are appropriate */
if( (pPlaneIn->u_width != pPlaneOut[0].u_width) ||
(pPlaneOut[0].u_width != (pPlaneOut[1].u_width<<1)) ||
(pPlaneOut[0].u_width != (pPlaneOut[2].u_width<<1)))
{
return M4VIFI_ILLEGAL_FRAME_WIDTH;
}
/* Set the pointer to the beginning of the output data buffers */
pu8_y_data = pPlaneOut[0].pac_data + pPlaneOut[0].u_topleft;
pu8_u_data = pPlaneOut[1].pac_data + pPlaneOut[1].u_topleft;
pu8_v_data = pPlaneOut[2].pac_data + pPlaneOut[2].u_topleft;
/* Set the pointer to the beginning of the input data buffers */
pu8_rgbn_data = pPlaneIn->pac_data + pPlaneIn->u_topleft;
/* Get the size of the output image */
u32_width = pPlaneOut[0].u_width;
u32_height = pPlaneOut[0].u_height;
/* Set the size of the memory jumps corresponding to row jump in each output plane */
u32_stride_Y = pPlaneOut[0].u_stride;
u32_stride2_Y = u32_stride_Y << 1;
u32_stride_U = pPlaneOut[1].u_stride;
u32_stride_V = pPlaneOut[2].u_stride;
/* Set the size of the memory jumps corresponding to row jump in input plane */
u32_stride_rgb = pPlaneIn->u_stride;
u32_stride_2rgb = u32_stride_rgb << 1;
/* Loop on each row of the output image, input coordinates are estimated from output ones */
/* Two YUV rows are computed at each pass */
for (u32_row = u32_height ;u32_row != 0; u32_row -=2)
{
/* Current Y plane row pointers */
pu8_yn = pu8_y_data;
/* Next Y plane row pointers */
pu8_ys = pu8_yn + u32_stride_Y;
/* Current U plane row pointer */
pu8_u = pu8_u_data;
/* Current V plane row pointer */
pu8_v = pu8_v_data;
pu8_rgbn = pu8_rgbn_data;
/* Loop on each column of the output image */
for (u32_col = u32_width; u32_col != 0 ; u32_col -=2)
{
/* Get four RGB 565 samples from input data */
u16_pix1 = *( (M4VIFI_UInt16 *) pu8_rgbn);
u16_pix2 = *( (M4VIFI_UInt16 *) (pu8_rgbn + CST_RGB_16_SIZE));
u16_pix3 = *( (M4VIFI_UInt16 *) (pu8_rgbn + u32_stride_rgb));
u16_pix4 = *( (M4VIFI_UInt16 *) (pu8_rgbn + u32_stride_rgb + CST_RGB_16_SIZE));
/* Unpack RGB565 to 8bit R, G, B */
/* (x,y) */
GET_RGB565(i32_b00,i32_g00,i32_r00,u16_pix1);
/* (x+1,y) */
GET_RGB565(i32_b10,i32_g10,i32_r10,u16_pix2);
/* (x,y+1) */
GET_RGB565(i32_b01,i32_g01,i32_r01,u16_pix3);
/* (x+1,y+1) */
GET_RGB565(i32_b11,i32_g11,i32_r11,u16_pix4);
/* If RGB is transparent color (0, 63, 0), we transform it to white (31,63,31) */
if(i32_b00 == 0 && i32_g00 == 63 && i32_r00 == 0)
{
i32_b00 = 31;
i32_r00 = 31;
}
if(i32_b10 == 0 && i32_g10 == 63 && i32_r10 == 0)
{
i32_b10 = 31;
i32_r10 = 31;
}
if(i32_b01 == 0 && i32_g01 == 63 && i32_r01 == 0)
{
i32_b01 = 31;
i32_r01 = 31;
}
if(i32_b11 == 0 && i32_g11 == 63 && i32_r11 == 0)
{
i32_b11 = 31;
i32_r11 = 31;
}
/* Convert RGB value to YUV */
i32_u00 = U16(i32_r00, i32_g00, i32_b00);
i32_v00 = V16(i32_r00, i32_g00, i32_b00);
/* luminance value */
i32_y00 = Y16(i32_r00, i32_g00, i32_b00);
i32_u10 = U16(i32_r10, i32_g10, i32_b10);
i32_v10 = V16(i32_r10, i32_g10, i32_b10);
/* luminance value */
i32_y10 = Y16(i32_r10, i32_g10, i32_b10);
i32_u01 = U16(i32_r01, i32_g01, i32_b01);
i32_v01 = V16(i32_r01, i32_g01, i32_b01);
/* luminance value */
i32_y01 = Y16(i32_r01, i32_g01, i32_b01);
i32_u11 = U16(i32_r11, i32_g11, i32_b11);
i32_v11 = V16(i32_r11, i32_g11, i32_b11);
/* luminance value */
i32_y11 = Y16(i32_r11, i32_g11, i32_b11);
/* Store luminance data */
pu8_yn[0] = (M4VIFI_UInt8)i32_y00;
pu8_yn[1] = (M4VIFI_UInt8)i32_y10;
pu8_ys[0] = (M4VIFI_UInt8)i32_y01;
pu8_ys[1] = (M4VIFI_UInt8)i32_y11;
*pu8_u = (M4VIFI_UInt8)((i32_u00 + i32_u01 + i32_u10 + i32_u11 + 2) >> 2);
*pu8_v = (M4VIFI_UInt8)((i32_v00 + i32_v01 + i32_v10 + i32_v11 + 2) >> 2);
/* Prepare for next column */
pu8_rgbn += (CST_RGB_16_SIZE<<1);
/* Update current Y plane line pointer*/
pu8_yn += 2;
/* Update next Y plane line pointer*/
pu8_ys += 2;
/* Update U plane line pointer*/
pu8_u ++;
/* Update V plane line pointer*/
pu8_v ++;
} /* End of horizontal scanning */
/* Prepare pointers for the next row */
pu8_y_data += u32_stride2_Y;
pu8_u_data += u32_stride_U;
pu8_v_data += u32_stride_V;
pu8_rgbn_data += u32_stride_2rgb;
} /* End of vertical scanning */
return M4VIFI_OK;
}
/* End of file M4VIFI_RGB565toYUV420.c */
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