| /* |
| * 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. |
| */ |
| #include "M4VIFI_FiltersAPI.h" |
| |
| #include "M4VIFI_Defines.h" |
| |
| #include "M4VIFI_Clip.h" |
| |
| /*************************************************************************** |
| Proto: |
| M4VIFI_UInt8 M4VIFI_RGB888toYUV420(void *pUserData, M4VIFI_ImagePlane *PlaneIn, |
| M4VIFI_ImagePlane PlaneOut[3]); |
| Purpose: filling of the YUV420 plane from a BGR24 plane |
| Abstract: Loop on each row ( 2 rows by 2 rows ) |
| Loop on each column ( 2 col by 2 col ) |
| Get 4 BGR samples from input data and build 4 output Y samples and |
| each single U & V data |
| end loop on col |
| end loop on row |
| |
| In: RGB24 plane |
| InOut: none |
| Out: array of 3 M4VIFI_ImagePlane structures |
| Modified: ML: RGB function modified to BGR. |
| ***************************************************************************/ |
| M4VIFI_UInt8 M4VIFI_RGB888toYUV420(void *pUserData, M4VIFI_ImagePlane *PlaneIn, |
| M4VIFI_ImagePlane PlaneOut[3]) |
| { |
| M4VIFI_UInt32 u32_width, u32_height; |
| M4VIFI_UInt32 u32_stride_Y, u32_stride2_Y, u32_stride_U, u32_stride_V, 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; |
| |
| /* check sizes */ |
| if( (PlaneIn->u_height != PlaneOut[0].u_height) || |
| (PlaneOut[0].u_height != (PlaneOut[1].u_height<<1)) || |
| (PlaneOut[0].u_height != (PlaneOut[2].u_height<<1))) |
| return M4VIFI_ILLEGAL_FRAME_HEIGHT; |
| |
| if( (PlaneIn->u_width != PlaneOut[0].u_width) || |
| (PlaneOut[0].u_width != (PlaneOut[1].u_width<<1)) || |
| (PlaneOut[0].u_width != (PlaneOut[2].u_width<<1))) |
| return M4VIFI_ILLEGAL_FRAME_WIDTH; |
| |
| |
| /* set the pointer to the beginning of the output data buffers */ |
| pu8_y_data = PlaneOut[0].pac_data + PlaneOut[0].u_topleft; |
| pu8_u_data = PlaneOut[1].pac_data + PlaneOut[1].u_topleft; |
| pu8_v_data = PlaneOut[2].pac_data + PlaneOut[2].u_topleft; |
| |
| /* idem for input buffer */ |
| pu8_rgbn_data = PlaneIn->pac_data + PlaneIn->u_topleft; |
| |
| /* get the size of the output image */ |
| u32_width = PlaneOut[0].u_width; |
| u32_height = PlaneOut[0].u_height; |
| |
| /* set the size of the memory jumps corresponding to row jump in each output plane */ |
| u32_stride_Y = PlaneOut[0].u_stride; |
| u32_stride2_Y= u32_stride_Y << 1; |
| u32_stride_U = PlaneOut[1].u_stride; |
| u32_stride_V = PlaneOut[2].u_stride; |
| |
| /* idem for input plane */ |
| u32_stride_rgb = PlaneIn->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) |
| { |
| /* update working pointers */ |
| pu8_yn = pu8_y_data; |
| pu8_ys = pu8_yn + u32_stride_Y; |
| |
| pu8_u = pu8_u_data; |
| 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 RGB samples of 4 pixels */ |
| GET_RGB24(i32_r00, i32_g00, i32_b00, pu8_rgbn, 0); |
| GET_RGB24(i32_r10, i32_g10, i32_b10, pu8_rgbn, CST_RGB_24_SIZE); |
| GET_RGB24(i32_r01, i32_g01, i32_b01, pu8_rgbn, u32_stride_rgb); |
| GET_RGB24(i32_r11, i32_g11, i32_b11, pu8_rgbn, u32_stride_rgb + CST_RGB_24_SIZE); |
| |
| i32_u00 = U24(i32_r00, i32_g00, i32_b00); |
| i32_v00 = V24(i32_r00, i32_g00, i32_b00); |
| i32_y00 = Y24(i32_r00, i32_g00, i32_b00); /* matrix luminance */ |
| pu8_yn[0]= (M4VIFI_UInt8)i32_y00; |
| |
| i32_u10 = U24(i32_r10, i32_g10, i32_b10); |
| i32_v10 = V24(i32_r10, i32_g10, i32_b10); |
| i32_y10 = Y24(i32_r10, i32_g10, i32_b10); |
| pu8_yn[1]= (M4VIFI_UInt8)i32_y10; |
| |
| i32_u01 = U24(i32_r01, i32_g01, i32_b01); |
| i32_v01 = V24(i32_r01, i32_g01, i32_b01); |
| i32_y01 = Y24(i32_r01, i32_g01, i32_b01); |
| pu8_ys[0]= (M4VIFI_UInt8)i32_y01; |
| |
| i32_u11 = U24(i32_r11, i32_g11, i32_b11); |
| i32_v11 = V24(i32_r11, i32_g11, i32_b11); |
| i32_y11 = Y24(i32_r11, i32_g11, i32_b11); |
| 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); |
| |
| pu8_rgbn += (CST_RGB_24_SIZE<<1); |
| pu8_yn += 2; |
| pu8_ys += 2; |
| |
| pu8_u ++; |
| pu8_v ++; |
| } /* end of horizontal scanning */ |
| |
| 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; |
| } |