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path: root/tvapi/libtv/tv/AutoBackLight.cpp (plain)
blob: db159559ca0c134d9b9cfba25b31c99a00e36334
1#define LOG_TAG "AutoBackLight"
2
3#include "AutoBackLight.h"
4#include "../tvsetting/CTvSetting.h"
5#include "../tvconfig/tvconfig.h"
6#include "../tvutils/tvutils.h"
7#include <stdio.h>
8#include <unistd.h>
9#include <sys/types.h>
10#include <sys/stat.h>
11#include <sys/ioctl.h>
12#include <fcntl.h>
13#include <string.h>
14#include <errno.h>
15#include <dlfcn.h>
16#include <linux/fb.h>
17#include <stdlib.h>
18#include <cutils/properties.h>
19
20AutoBackLight::AutoBackLight()
21{
22 mAutoBacklightSource = SOURCE_TYPE_TV;
23 mCur_source_default_backlight = 100;
24 mCur_sig_state == SIG_STATE_NOSIG;
25 mAutoBacklight_OnOff_Flag = false;
26 mCurrent_backlight = 100;
27 mCur_dest_backlight = 100;
28}
29
30AutoBackLight::~AutoBackLight()
31{
32 mAutoBacklight_OnOff_Flag = false;
33}
34
35bool AutoBackLight::isAutoBacklightOn()
36{
37 return mAutoBacklight_OnOff_Flag;
38}
39
40void AutoBackLight::updateSigState(int state)
41{
42 mCur_sig_state = state;
43 LOGD("updateSigState = %d", mCur_sig_state);
44}
45
46void AutoBackLight::startAutoBacklight( tv_source_input_type_t source_type )
47{
48 mAutoBacklightSource = source_type;
49 mCur_source_default_backlight = CVpp::getInstance()->GetBacklight(source_type);
50 mCurrent_backlight = mCur_source_default_backlight;
51 CVpp::getInstance()->SetBacklight(mCur_source_default_backlight, source_type, 1);
52
53 /*
54 mDefault_auto_bl_value = def_source_bl_value;
55 dynamicGamma = mDefault_auto_bl_value * mCur_source_default_backlight / 100;
56 // this if should not happen
57 if (dynamicGamma > mCur_source_default_backlight) {
58 dynamicGamma = mCur_source_default_backlight;
59 }
60 */
61
62 if (!mAutoBacklight_OnOff_Flag) {
63 mAutoBacklight_OnOff_Flag = true;
64 this->run();
65 }
66}
67
68void AutoBackLight::stopAutoBacklight()
69{
70 if (mAutoBacklight_OnOff_Flag) {
71 mAutoBacklight_OnOff_Flag = false;
72 CVpp::getInstance()->SetBacklight(mCur_source_default_backlight, mAutoBacklightSource, 1);
73 }
74}
75
76/**
77 * @ description: tpv project
78 * @ return:value
79 * value <= 20: mCur_dest_backlight is 14
80 * 20 < value <= 160: mCur_dest_backlight is 57
81 *160 < value: mCur_dest_backlight is 100
82 */
83void AutoBackLight::adjustDstBacklight()
84{
85 if (mCur_sig_state == SIG_STATE_STABLE) {
86 //the node is used to adjust current ts is static or dynamtic frame
87 char temp_str = 0;
88 int fd = open("/sys/module/di/parameters/frame_dynamic", O_RDWR);
89 if (fd <= 0) {
90 LOGE("open /sys/module/di/parameters/frame_dynamic ERROR!!\n");
91 return;
92 }
93
94 if (read(fd, &temp_str, 1) > 0) {
95
96 if (temp_str == 'N') {
97 mCur_dest_backlight = mCur_source_default_backlight;
98 } else if (temp_str == 'Y') {
99 int pwm = HistogramGet_AVE();
100 if (pwm <= 20) {
101 mCur_dest_backlight = 14;
102 } else if (pwm > 20 && pwm <= 160) {
103 mCur_dest_backlight = 57;
104 } else {
105 mCur_dest_backlight = 100;
106 }
107 //LOGD("pwm = %d, mCur_dest_backlight = %d", pwm, mCur_dest_backlight);
108 }
109 }
110 close(fd);
111 } else {
112 mCurrent_backlight = mCur_dest_backlight = mCur_source_default_backlight;
113 CVpp::getInstance()->SetBacklight(mCurrent_backlight, mAutoBacklightSource, 0);
114 }
115
116 /*
117 if (pwm > 0)
118 pwm_max = pwm;
119 else
120 pwm_min = pwm;
121 pwm = 255 - pwm;
122 int average = (pwm_min + pwm_max) / 2;
123 dynamicGammaOffset = (pwm - average) / 10;
124 dynamicGammaOffset = dynamicGammaOffset * mDefault_auto_bl_value / 100;
125
126 //the node is used to adjust current ts is static or dynamtic frame
127 char temp_str = 0;
128 int fd = open("/sys/module/di/parameters/frame_dynamic", O_RDWR);
129 if (fd <= 0) {
130 LOGE("open /sys/module/di/parameters/frame_dynamic ERROR!!\n");
131 return;
132 }
133
134 if (read(fd, &temp_str, 1) > 0) {
135 if (temp_str== 'N') {
136 mCur_dest_backlight = mCur_source_default_backlight;
137 }
138 else if (temp_str == 'Y') {
139 mCur_dest_backlight = dynamicGamma + dynamicGammaOffset;
140
141 if (mCur_dest_backlight > mCur_source_default_backlight) {
142 mCur_dest_backlight = mCur_source_default_backlight;
143 }
144 else if (mCur_dest_backlight < 0) {
145 mCur_dest_backlight = 0;
146 }
147 }
148 }
149 close(fd);
150 */
151}
152
153void AutoBackLight::adjustBacklight()
154{
155 if (mCurrent_backlight == mCur_dest_backlight) {
156 return;
157 } else if ((mCurrent_backlight - mCur_dest_backlight) > -2 && (mCurrent_backlight - mCur_dest_backlight) < 2) {
158 mCurrent_backlight = mCur_dest_backlight;
159 CVpp::getInstance()->SetBacklight(mCurrent_backlight, mAutoBacklightSource, 0);
160 } else if (mCurrent_backlight < mCur_dest_backlight) {
161 mCurrent_backlight = mCurrent_backlight + 2;
162 CVpp::getInstance()->SetBacklight(mCurrent_backlight, mAutoBacklightSource, 0);
163 } else if (mCurrent_backlight > mCur_dest_backlight) {
164 mCurrent_backlight = mCurrent_backlight - 2;
165 CVpp::getInstance()->SetBacklight(mCurrent_backlight, mAutoBacklightSource, 0);
166 }
167
168 //LOGD("mCurrent_backlight = %d", mCurrent_backlight);
169}
170
171/**
172 * @ description: get current picture's average brightness
173 * @ return: 0~255,0 is darkest,255 is brightest
174 */
175int AutoBackLight::HistogramGet_AVE()
176{
177 int hist_ave = 0;
178 tvin_parm_t vdinParam;
179 if (0 == CTvin::getInstance()->VDIN_GetVdinParam(&vdinParam)) {
180 if (vdinParam.pixel_sum != 0) {
181 hist_ave = vdinParam.luma_sum / vdinParam.pixel_sum;
182 LOGD("[hist_ave][%d].", hist_ave);
183 return hist_ave;
184 }
185 LOGE("vdinParam.pixel_sum is zero, so the value is infinity\n");
186 return -1;
187 }
188 LOGE("VDIN_GetVdinParam get data error!!!\n");
189 return -1;
190}
191
192bool AutoBackLight::threadLoop()
193{
194 int sleeptime = 50;//ms
195 int adjustBacklightCount = 0;
196 while ( mAutoBacklight_OnOff_Flag ) {
197 usleep ( sleeptime * 1000 );
198 adjustBacklightCount++;
199 if (adjustBacklightCount == 24) {
200 adjustBacklightCount = 0;
201 adjustDstBacklight();
202 }
203 adjustBacklight();
204 }
205
206 return false;//return true, run again, return false,not run.
207}
208
generated by cgit at 2024-05-10 21:50:00 (GMT)