package com.arksine.easycam;
import android.app.Activity;
import android.content.Context;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbManager;
import android.os.Bundle;
import android.preference.EditTextPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;
import android.util.Log;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
/**
* TODO: Create a fragment to Add and Edit entries in the devices.json file.
* PrefenceFragment isn't robust enough to easily handle all of the functionality
* required. In the meantime, the devices.json file can be edited directly
* if we need to change settings or create a new device profile. This will probably
* require that I implement a custom "ListPreference" for the "select device" preference.
*/
public class SettingsActivity extends Activity {
private static String TAG = "SettingsActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getFragmentManager().beginTransaction()
.add(android.R.id.content, new SettingsFragment())
.commit();
}
public static class SettingsFragment extends PreferenceFragment {
private class DeviceEntry {
public String deviceDescription;
public String deviceName;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Load the preferences from an XML resource
addPreferencesFromResource(R.xml.preferences);
PreferenceScreen root = this.getPreferenceScreen();
ListPreference selectDevice = (ListPreference) root.findPreference("pref_key_select_device");
ListPreference selectStandard = (ListPreference) root.findPreference("pref_key_select_standard");
ListPreference selectDeint = (ListPreference) root.findPreference("pref_key_deinterlace_method");
EditTextPreference selectDevLoc = (EditTextPreference) root.findPreference("pref_select_dev_loc");
ArrayList<DeviceEntry> validStreamingDeviceList = enumerateUsbDevices();
populateDeviceListPreference(validStreamingDeviceList, selectDevice);
// Set the summaries for preferences that assign them dynamically
selectDevice.setSummary(selectDevice.getEntry());
selectStandard.setSummary(selectStandard.getEntry());
selectDeint.setSummary(selectDeint.getEntry());
selectDevLoc.setSummary(selectDevLoc.getText());
/**
* Below are listeners for each of our device settings that update the summary based on the
* currently selected value.
*/
selectDevice.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
ListPreference list = (ListPreference)preference;
CharSequence[] entries = list.getEntries();
int index = list.findIndexOfValue((String)newValue);
preference.setSummary(entries[index]);
return true;
}
});
selectStandard.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
ListPreference list = (ListPreference)preference;
CharSequence[] entries = list.getEntries();
int index = list.findIndexOfValue((String)newValue);
preference.setSummary(entries[index]);
return true;
}
});
selectDeint.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
ListPreference list = (ListPreference)preference;
CharSequence[] entries = list.getEntries();
int index = list.findIndexOfValue((String)newValue);
preference.setSummary(entries[index]);
return true;
}
});
selectDevLoc.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
preference.setSummary((String)newValue);
return true;
}
});
}
private void populateDeviceListPreference(ArrayList<DeviceEntry> validStreamingDeviceList,
ListPreference selectDevice) {
CharSequence[] entries;
CharSequence[] entryValues;
if (validStreamingDeviceList.isEmpty()) {
Log.i(TAG, "No V4L2 compatible streaming devices found on system");
entries = new CharSequence[1];
entryValues = new CharSequence[1];
entries[0] = "No devices found";
entryValues[0] = "NO_DEVICE";
selectDevice.setSummary(entries[0]);
}
else {
entries = new CharSequence[validStreamingDeviceList.size()];
entryValues = new CharSequence[validStreamingDeviceList.size()];
for (int i = 0; i < validStreamingDeviceList.size(); i++) {
entries[i] = validStreamingDeviceList.get(i).deviceDescription;
entryValues[i] = validStreamingDeviceList.get(i).deviceName;
}
}
selectDevice.setEntries(entries);
selectDevice.setEntryValues(entryValues);
}
private ArrayList<DeviceEntry> enumerateUsbDevices() {
ArrayList<DeviceEntry> validStreamingDeviceList = new ArrayList<>(5);
synchronized (JsonManager.lock) {
//Make sure the JsonManger has been initialized
if (!JsonManager.isInitialized())
JsonManager.initialize();
// Enumerate a list of currently connected Usb devices so we can pick out which
// ones are supported easycap devices
UsbManager mUsbManager = (UsbManager) getActivity().getSystemService(Context.USB_SERVICE);
HashMap<String, UsbDevice> usbDeviceList = mUsbManager.getDeviceList();
Iterator<UsbDevice> deviceIterator = usbDeviceList.values().iterator();
// Make sure the device list is empty before enumeration
validStreamingDeviceList.clear();
while(deviceIterator.hasNext()) {
UsbDevice uDevice = deviceIterator.next();
DeviceInfo devInfo = JsonManager.getDevice(uDevice.getVendorId(), uDevice.getProductId(),
DeviceInfo.DeviceStandard.NTSC);
// If a supported device is listed in json list, request permission
// to access it
if (devInfo != null) {
Log.i(TAG, "Supported usb device found: " + uDevice.toString());
Log.i(TAG, "Device ID: " + uDevice.getDeviceId());
Log.i(TAG, "Device Name: " + uDevice.getDeviceName());
Log.i(TAG, "Vendor: ID " + uDevice.getVendorId());
Log.i(TAG, "Product ID: " + uDevice.getProductId());
DeviceEntry devEntry = new DeviceEntry();
devEntry.deviceDescription = devInfo.getDescription() + " @ " + uDevice.getDeviceName();
devEntry.deviceName = uDevice.getDeviceName() + ":" + devInfo.getVendorID()
+ ":" + devInfo.getProductID();
validStreamingDeviceList.add(devEntry);
}
}
}
return validStreamingDeviceList;
}
}
}
