1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include "M4VIFI_FiltersAPI.h" 17 18 #include "M4VIFI_Defines.h" 19 20 #include "M4VIFI_Clip.h" 21 22 /*************************************************************************** 23 Proto: 24 M4VIFI_UInt8 M4VIFI_RGB888toYUV420(void *pUserData, M4VIFI_ImagePlane *PlaneIn, 25 M4VIFI_ImagePlane PlaneOut[3]); 26 Purpose: filling of the YUV420 plane from a BGR24 plane 27 Abstract: Loop on each row ( 2 rows by 2 rows ) 28 Loop on each column ( 2 col by 2 col ) 29 Get 4 BGR samples from input data and build 4 output Y samples and 30 each single U & V data 31 end loop on col 32 end loop on row 33 34 In: RGB24 plane 35 InOut: none 36 Out: array of 3 M4VIFI_ImagePlane structures 37 Modified: ML: RGB function modified to BGR. 38 ***************************************************************************/ 39 M4VIFI_UInt8 M4VIFI_RGB888toYUV420(void *pUserData, M4VIFI_ImagePlane *PlaneIn, 40 M4VIFI_ImagePlane PlaneOut[3]) 41 { 42 M4VIFI_UInt32 u32_width, u32_height; 43 M4VIFI_UInt32 u32_stride_Y, u32_stride2_Y, u32_stride_U, u32_stride_V, u32_stride_rgb,\ 44 u32_stride_2rgb; 45 M4VIFI_UInt32 u32_col, u32_row; 46 47 M4VIFI_Int32 i32_r00, i32_r01, i32_r10, i32_r11; 48 M4VIFI_Int32 i32_g00, i32_g01, i32_g10, i32_g11; 49 M4VIFI_Int32 i32_b00, i32_b01, i32_b10, i32_b11; 50 M4VIFI_Int32 i32_y00, i32_y01, i32_y10, i32_y11; 51 M4VIFI_Int32 i32_u00, i32_u01, i32_u10, i32_u11; 52 M4VIFI_Int32 i32_v00, i32_v01, i32_v10, i32_v11; 53 M4VIFI_UInt8 *pu8_yn, *pu8_ys, *pu8_u, *pu8_v; 54 M4VIFI_UInt8 *pu8_y_data, *pu8_u_data, *pu8_v_data; 55 M4VIFI_UInt8 *pu8_rgbn_data, *pu8_rgbn; 56 57 /* check sizes */ 58 if( (PlaneIn->u_height != PlaneOut[0].u_height) || 59 (PlaneOut[0].u_height != (PlaneOut[1].u_height<<1)) || 60 (PlaneOut[0].u_height != (PlaneOut[2].u_height<<1))) 61 return M4VIFI_ILLEGAL_FRAME_HEIGHT; 62 63 if( (PlaneIn->u_width != PlaneOut[0].u_width) || 64 (PlaneOut[0].u_width != (PlaneOut[1].u_width<<1)) || 65 (PlaneOut[0].u_width != (PlaneOut[2].u_width<<1))) 66 return M4VIFI_ILLEGAL_FRAME_WIDTH; 67 68 69 /* set the pointer to the beginning of the output data buffers */ 70 pu8_y_data = PlaneOut[0].pac_data + PlaneOut[0].u_topleft; 71 pu8_u_data = PlaneOut[1].pac_data + PlaneOut[1].u_topleft; 72 pu8_v_data = PlaneOut[2].pac_data + PlaneOut[2].u_topleft; 73 74 /* idem for input buffer */ 75 pu8_rgbn_data = PlaneIn->pac_data + PlaneIn->u_topleft; 76 77 /* get the size of the output image */ 78 u32_width = PlaneOut[0].u_width; 79 u32_height = PlaneOut[0].u_height; 80 81 /* set the size of the memory jumps corresponding to row jump in each output plane */ 82 u32_stride_Y = PlaneOut[0].u_stride; 83 u32_stride2_Y= u32_stride_Y << 1; 84 u32_stride_U = PlaneOut[1].u_stride; 85 u32_stride_V = PlaneOut[2].u_stride; 86 87 /* idem for input plane */ 88 u32_stride_rgb = PlaneIn->u_stride; 89 u32_stride_2rgb = u32_stride_rgb << 1; 90 91 /* loop on each row of the output image, input coordinates are estimated from output ones */ 92 /* two YUV rows are computed at each pass */ 93 for (u32_row = u32_height ;u32_row != 0; u32_row -=2) 94 { 95 /* update working pointers */ 96 pu8_yn = pu8_y_data; 97 pu8_ys = pu8_yn + u32_stride_Y; 98 99 pu8_u = pu8_u_data; 100 pu8_v = pu8_v_data; 101 102 pu8_rgbn= pu8_rgbn_data; 103 104 /* loop on each column of the output image*/ 105 for (u32_col = u32_width; u32_col != 0 ; u32_col -=2) 106 { 107 /* get RGB samples of 4 pixels */ 108 GET_RGB24(i32_r00, i32_g00, i32_b00, pu8_rgbn, 0); 109 GET_RGB24(i32_r10, i32_g10, i32_b10, pu8_rgbn, CST_RGB_24_SIZE); 110 GET_RGB24(i32_r01, i32_g01, i32_b01, pu8_rgbn, u32_stride_rgb); 111 GET_RGB24(i32_r11, i32_g11, i32_b11, pu8_rgbn, u32_stride_rgb + CST_RGB_24_SIZE); 112 113 i32_u00 = U24(i32_r00, i32_g00, i32_b00); 114 i32_v00 = V24(i32_r00, i32_g00, i32_b00); 115 i32_y00 = Y24(i32_r00, i32_g00, i32_b00); /* matrix luminance */ 116 pu8_yn[0]= (M4VIFI_UInt8)i32_y00; 117 118 i32_u10 = U24(i32_r10, i32_g10, i32_b10); 119 i32_v10 = V24(i32_r10, i32_g10, i32_b10); 120 i32_y10 = Y24(i32_r10, i32_g10, i32_b10); 121 pu8_yn[1]= (M4VIFI_UInt8)i32_y10; 122 123 i32_u01 = U24(i32_r01, i32_g01, i32_b01); 124 i32_v01 = V24(i32_r01, i32_g01, i32_b01); 125 i32_y01 = Y24(i32_r01, i32_g01, i32_b01); 126 pu8_ys[0]= (M4VIFI_UInt8)i32_y01; 127 128 i32_u11 = U24(i32_r11, i32_g11, i32_b11); 129 i32_v11 = V24(i32_r11, i32_g11, i32_b11); 130 i32_y11 = Y24(i32_r11, i32_g11, i32_b11); 131 pu8_ys[1] = (M4VIFI_UInt8)i32_y11; 132 133 *pu8_u = (M4VIFI_UInt8)((i32_u00 + i32_u01 + i32_u10 + i32_u11 + 2) >> 2); 134 *pu8_v = (M4VIFI_UInt8)((i32_v00 + i32_v01 + i32_v10 + i32_v11 + 2) >> 2); 135 136 pu8_rgbn += (CST_RGB_24_SIZE<<1); 137 pu8_yn += 2; 138 pu8_ys += 2; 139 140 pu8_u ++; 141 pu8_v ++; 142 } /* end of horizontal scanning */ 143 144 pu8_y_data += u32_stride2_Y; 145 pu8_u_data += u32_stride_U; 146 pu8_v_data += u32_stride_V; 147 pu8_rgbn_data += u32_stride_2rgb; 148 149 150 } /* End of vertical scanning */ 151 152 return M4VIFI_OK; 153 } 154
