1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * Copyright (C) 2016 Mopria Alliance, Inc. 4 * Copyright (C) 2013 Hewlett-Packard Development Company, L.P. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #ifndef LIB_PHOTO_SCALER_H 20 #define LIB_PHOTO_SCALER_H 21 22 #ifdef __cplusplus 23 extern "C" { 24 #endif 25 26 #include "wtypes.h" 27 28 typedef unsigned char bool_t; 29 30 /* 31 * A 64-bit floating point value 32 */ 33 typedef struct float64_s { 34 uint32 decimal; 35 uint32 fraction; 36 } float64_t; 37 38 /* 39 * Mode selected for a scaling operation 40 */ 41 typedef enum scaler_modes_e { 42 PSCALER_SCALE_UP = 1, 43 PSCALER_SCALE_DOWN = 2, 44 PSCALER_SCALE_MIXED_XUP = 5, 45 PSCALER_SCALE_MIXED_YUP = 7, 46 47 PSCALER_SCALE_MODE_INVALID 48 } scaler_mode_t; 49 50 /* 51 * Context structure for a scaling operation 52 */ 53 typedef struct scaler_config_s { 54 uint16 iSrcWidth; // input width (x-axis dimension) 55 uint16 iSrcHeight; // input height (y-axis dimension) 56 57 uint16 iOutWidth; // output width (x-axis dimension) 58 uint16 iOutHeight; // output height (y-axis dimension) 59 60 uint8 *pSrcBuf; // input buffers [plane] 61 uint16 iSrcBufWidth; // input buffer width (typically source width) 62 63 uint8 *pOutBuf; // output buffers [plane] 64 uint16 iOutBufWidth; // output buffer width 65 66 uint8 *pTmpBuf; // mixed axis temp buffer 67 float64_t fSrcStartRow; // first input row as a float 68 uint16 iSrcStartRow; // first input row of this slice 69 uint16 iSrcEndRow; // last input row of this slice 70 71 uint16 iOutStartRow; // first output row of this slice 72 uint16 iOutEndRow; // last output row of this slice 73 74 float64_t fSrcStartColumn; // first input column as a float 75 76 uint16 iOutStartColumn; // first output column of this slice 77 78 float64_t fXfactor; // x_factor_int & x_factor_fract 79 float64_t fXfactorInv; // x_factor_inv_int & x_factor_inv_fract 80 float64_t fYfactor; // y_factor_int & y_factor_fract 81 float64_t fYfactorInv; // y_factor_inv_int & y_factor_inv_fract 82 83 scaler_mode_t scaleMode; // scale mode for the current image 84 } scaler_config_t; 85 86 /* 87 * Called once per job to initialize pscaler_config for specified input/output sizes 88 */ 89 extern void scaler_make_image_scaler_tables(uint16 image_input_width, uint16 image_input_buf_width, 90 uint16 image_output_width, uint16 image_output_buf_width, uint16 image_input_height, 91 uint16 image_output_height, scaler_config_t *pscaler_config); 92 93 /* 94 * Called once to configure a single image stripe/slice. Must be called after 95 * scaler_make_image_scaler_tables. 96 */ 97 extern void scaler_calculate_scaling_rows(uint16 start_output_row_number, 98 uint16 end_output_row_number, void *tables_ptr, uint16 *start_input_row_number, 99 uint16 *end_input_row_number, uint16 *num_output_rows_generated, 100 uint16 *num_rows_offset_to_start_output_row, 101 uint32 *mixed_axis_temp_buffer_size_needed); 102 103 /* 104 * Called after each call to scaler_calculate_scaling_rows to produce scaled output 105 */ 106 extern void scaler_scale_image_data(uint8 *input_plane, void *tables_ptr, 107 uint8 *scaled_output_plane, uint8 *temp_buffer_for_mixed_axis_scaling); 108 109 #ifdef __cplusplus 110 } 111 #endif 112 113 #endif // LIB_PHOTO_SCALER_H