Wind Yuan | 75564b1 | 2015-01-15 06:51:15 -0500 | [diff] [blame] | 1 | /* |
| 2 | * sensor_descriptor.h - sensor descriptor |
| 3 | * |
| 4 | * Copyright (c) 2015 Intel Corporation |
| 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 | * Author: Wind Yuan <feng.yuan@intel.com> |
| 19 | */ |
| 20 | |
| 21 | #include "sensor_descriptor.h" |
| 22 | #include <math.h> |
| 23 | |
| 24 | namespace XCam { |
| 25 | |
| 26 | SensorDescriptor::SensorDescriptor () |
| 27 | { |
| 28 | xcam_mem_clear (&_sensor_data); |
| 29 | } |
| 30 | |
| 31 | SensorDescriptor::~SensorDescriptor () |
| 32 | { |
| 33 | } |
| 34 | |
| 35 | bool |
| 36 | SensorDescriptor::is_ready () |
| 37 | { |
| 38 | return (_sensor_data.line_length_pck > 0); |
| 39 | } |
| 40 | |
| 41 | void |
| 42 | SensorDescriptor::set_sensor_data (struct atomisp_sensor_mode_data &data) |
| 43 | { |
| 44 | _sensor_data = data; |
| 45 | } |
| 46 | |
| 47 | bool |
| 48 | SensorDescriptor::exposure_time_to_integration ( |
| 49 | int32_t exposure_time, uint32_t &coarse_time, uint32_t &fine_time) |
| 50 | { |
| 51 | if (exposure_time < 0 || !is_ready ()) |
| 52 | return false; |
| 53 | |
| 54 | uint32_t pixel_periods = ((uint64_t)exposure_time) * _sensor_data.vt_pix_clk_freq_mhz / XCAM_SECONDS_2_TIMESTAMP (1); |
| 55 | |
| 56 | coarse_time = pixel_periods / _sensor_data.line_length_pck; |
| 57 | fine_time = pixel_periods % _sensor_data.line_length_pck; |
| 58 | return true; |
| 59 | } |
| 60 | |
| 61 | bool |
| 62 | SensorDescriptor::exposure_integration_to_time ( |
| 63 | uint32_t coarse_time, uint32_t fine_time, int32_t &exposure_time) |
| 64 | { |
| 65 | if (!is_ready ()) |
| 66 | return false; |
| 67 | |
| 68 | uint64_t pixel_periods = coarse_time * _sensor_data.line_length_pck + fine_time; |
| 69 | exposure_time = pixel_periods * XCAM_SECONDS_2_TIMESTAMP(1) / _sensor_data.vt_pix_clk_freq_mhz; |
| 70 | return true; |
| 71 | } |
| 72 | |
| 73 | bool |
| 74 | SensorDescriptor::exposure_gain_to_code ( |
| 75 | double analog_gain, double digital_gain, |
| 76 | int32_t &analog_code, int32_t &digital_code) |
| 77 | { |
| 78 | XCAM_ASSERT (digital_gain == 1.0); |
| 79 | double db = log10 (analog_gain * digital_gain) * 20; |
| 80 | if (db > 48) |
| 81 | db = 48; |
| 82 | analog_code = (uint32_t) (db * 160.0 / 48); |
| 83 | digital_code = 0; |
| 84 | return true; |
| 85 | } |
| 86 | |
| 87 | bool |
| 88 | SensorDescriptor::exposure_code_to_gain ( |
| 89 | int32_t analog_code, int32_t digital_code, |
| 90 | double &analog_gain, double &digital_gain) |
| 91 | { |
| 92 | double db = analog_code * 48.0 / 160.0; |
| 93 | analog_gain = pow (10.0, db / 20.0); |
| 94 | digital_gain = 1.0; |
| 95 | |
| 96 | return true; |
| 97 | } |
| 98 | |
| 99 | }; |