path: root/tvapi/libtv/tv/AutoBackLight.cpp (plain)
blob: ae13228c2f8e1e66293acb663c06ec4520e92fdf

1	#include "AutoBackLight.h"
2	#include "../tvsetting/CTvSetting.h"
3	#include "../tvconfig/tvconfig.h"
4	#include "../tvutils/tvutils.h"
5	#include <stdio.h>
6	#include <unistd.h>
7	#include <sys/types.h>
8	#include <sys/stat.h>
9	#include <sys/ioctl.h>
10	#include <fcntl.h>
11	#include <string.h>
12	#include <errno.h>
13	#include <dlfcn.h>
14	#include <linux/fb.h>
15	#include <stdlib.h>
16	#include <cutils/properties.h>
17
18	#ifdef LOG_TAG
19	#undef LOG_TAG
20	#define LOG_TAG "AutoBackLight"
21	#endif
22
23	AutoBackLight::AutoBackLight()
24	{
25	mAutoBacklightSource = SOURCE_TYPE_TV;
26	mCur_source_default_backlight = 100;
27	mCur_sig_state == SIG_STATE_NOSIG;
28	mAutoBacklight_OnOff_Flag = false;
29	mCurrent_backlight = 100;
30	mCur_dest_backlight = 100;
31	}
32
33	AutoBackLight::~AutoBackLight()
34	{
35	mAutoBacklight_OnOff_Flag = false;
36	}
37
38	bool AutoBackLight::isAutoBacklightOn()
39	{
40	return mAutoBacklight_OnOff_Flag;
41	}
42
43	void AutoBackLight::updateSigState(int state)
44	{
45	mCur_sig_state = state;
46	LOGD("updateSigState = %d", mCur_sig_state);
47	}
48
49	void AutoBackLight::startAutoBacklight( tv_source_input_type_t source_type )
50	{
51	mAutoBacklightSource = source_type;
52	mCur_source_default_backlight = CVpp::getInstance()->GetBacklight(source_type);
53	mCurrent_backlight = mCur_source_default_backlight;
54	CVpp::getInstance()->SetBacklight(mCur_source_default_backlight, source_type, 1);
55
56	/*
57	mDefault_auto_bl_value = def_source_bl_value;
58	dynamicGamma = mDefault_auto_bl_value * mCur_source_default_backlight / 100;
59	// this if should not happen
60	if (dynamicGamma > mCur_source_default_backlight) {
61	dynamicGamma = mCur_source_default_backlight;
62	}
63	*/
64
65	if (!mAutoBacklight_OnOff_Flag) {
66	mAutoBacklight_OnOff_Flag = true;
67	this->run();
68	}
69	}
70
71	void AutoBackLight::stopAutoBacklight()
72	{
73	if (mAutoBacklight_OnOff_Flag) {
74	mAutoBacklight_OnOff_Flag = false;
75	CVpp::getInstance()->SetBacklight(mCur_source_default_backlight, mAutoBacklightSource, 1);
76	}
77	}
78
79	/**
80	* @ description: tpv project
81	* @ return:value
82	* value <= 20: mCur_dest_backlight is 14
83	* 20 < value <= 160: mCur_dest_backlight is 57
84	*160 < value: mCur_dest_backlight is 100
85	*/
86	void AutoBackLight::adjustDstBacklight()
87	{
88	if (mCur_sig_state == SIG_STATE_STABLE) {
89	//the node is used to adjust current ts is static or dynamtic frame
90	char temp_str = 0;
91	int fd = open("/sys/module/di/parameters/frame_dynamic", O_RDWR);
92	if (fd <= 0) {
93	LOGE("open /sys/module/di/parameters/frame_dynamic ERROR!!\n");
94	return;
95	}
96
97	if (read(fd, &temp_str, 1) > 0) {
98
99	if (temp_str == 'N') {
100	mCur_dest_backlight = mCur_source_default_backlight;
101	} else if (temp_str == 'Y') {
102	int pwm = HistogramGet_AVE();
103	if (pwm <= 20) {
104	mCur_dest_backlight = 14;
105	} else if (pwm > 20 && pwm <= 160) {
106	mCur_dest_backlight = 57;
107	} else {
108	mCur_dest_backlight = 100;
109	}
110	//LOGD("pwm = %d, mCur_dest_backlight = %d", pwm, mCur_dest_backlight);
111	}
112	}
113	close(fd);
114	} else {
115	mCurrent_backlight = mCur_dest_backlight = mCur_source_default_backlight;
116	CVpp::getInstance()->SetBacklight(mCurrent_backlight, mAutoBacklightSource, 0);
117	}
118
119	/*
120	if (pwm > 0)
121	pwm_max = pwm;
122	else
123	pwm_min = pwm;
124	pwm = 255 - pwm;
125	int average = (pwm_min + pwm_max) / 2;
126	dynamicGammaOffset = (pwm - average) / 10;
127	dynamicGammaOffset = dynamicGammaOffset * mDefault_auto_bl_value / 100;
128
129	//the node is used to adjust current ts is static or dynamtic frame
130	char temp_str = 0;
131	int fd = open("/sys/module/di/parameters/frame_dynamic", O_RDWR);
132	if (fd <= 0) {
133	LOGE("open /sys/module/di/parameters/frame_dynamic ERROR!!\n");
134	return;
135	}
136
137	if (read(fd, &temp_str, 1) > 0) {
138	if (temp_str== 'N') {
139	mCur_dest_backlight = mCur_source_default_backlight;
140	}
141	else if (temp_str == 'Y') {
142	mCur_dest_backlight = dynamicGamma + dynamicGammaOffset;
143
144	if (mCur_dest_backlight > mCur_source_default_backlight) {
145	mCur_dest_backlight = mCur_source_default_backlight;
146	}
147	else if (mCur_dest_backlight < 0) {
148	mCur_dest_backlight = 0;
149	}
150	}
151	}
152	close(fd);
153	*/
154	}
155
156	void AutoBackLight::adjustBacklight()
157	{
158	if (mCurrent_backlight == mCur_dest_backlight) {
159	return;
160	} else if ((mCurrent_backlight - mCur_dest_backlight) > -2 && (mCurrent_backlight - mCur_dest_backlight) < 2) {
161	mCurrent_backlight = mCur_dest_backlight;
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	} else if (mCurrent_backlight > mCur_dest_backlight) {
167	mCurrent_backlight = mCurrent_backlight - 2;
168	CVpp::getInstance()->SetBacklight(mCurrent_backlight, mAutoBacklightSource, 0);
169	}
170
171	//LOGD("mCurrent_backlight = %d", mCurrent_backlight);
172	}
173
174	/**
175	* @ description: get current picture's average brightness
176	* @ return: 0~255,0 is darkest,255 is brightest
177	*/
178	int AutoBackLight::HistogramGet_AVE()
179	{
180	int hist_ave = 0;
181	tvin_parm_t vdinParam;
182	if (0 == CTvin::getInstance()->VDIN_GetVdinParam(&vdinParam)) {
183	if (vdinParam.pixel_sum != 0) {
184	hist_ave = vdinParam.luma_sum / vdinParam.pixel_sum;
185	LOGD("[hist_ave][%d].", hist_ave);
186	return hist_ave;
187	}
188	LOGE("vdinParam.pixel_sum is zero, so the value is infinity\n");
189	return -1;
190	}
191	LOGE("VDIN_GetVdinParam get data error!!!\n");
192	return -1;
193	}
194
195	bool AutoBackLight::threadLoop()
196	{
197	int sleeptime = 50;//ms
198	int adjustBacklightCount = 0;
199	while ( mAutoBacklight_OnOff_Flag ) {
200	usleep ( sleeptime * 1000 );
201	adjustBacklightCount++;
202	if (adjustBacklightCount == 24) {
203	adjustBacklightCount = 0;
204	adjustDstBacklight();
205	}
206	adjustBacklight();
207	}
208
209	return false;//return true, run again, return false,not run.
210	}
211