gecko-dev/dom/camera/CameraPreferences.cpp

426 строки
11 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CameraPreferences.h"
#include "CameraCommon.h"
#include "DOMCameraManager.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Monitor.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/Preferences.h"
#ifdef MOZ_WIDGET_GONK
#include "mozilla/Services.h"
#include "nsIObserverService.h"
#endif
using namespace mozilla;
/* statics */
static StaticAutoPtr<Monitor> sPrefMonitor;
StaticAutoPtr<nsCString> CameraPreferences::sPrefTestEnabled;
StaticAutoPtr<nsCString> CameraPreferences::sPrefHardwareTest;
StaticAutoPtr<nsCString> CameraPreferences::sPrefGonkParameters;
nsresult CameraPreferences::sPrefCameraControlMethodErrorOverride = NS_OK;
nsresult CameraPreferences::sPrefCameraControlAsyncErrorOverride = NS_OK;
uint32_t CameraPreferences::sPrefCameraControlLowMemoryThresholdMB = 0;
bool CameraPreferences::sPrefCameraParametersIsLowMemory = false;
bool CameraPreferences::sPrefCameraParametersPermission = false;
#ifdef MOZ_WIDGET_GONK
StaticRefPtr<CameraPreferences> CameraPreferences::sObserver;
NS_IMPL_ISUPPORTS(CameraPreferences, nsIObserver);
#endif
/* static */
nsresult
CameraPreferences::UpdatePref(const char* aPref, nsresult& aVal)
{
uint32_t val;
nsresult rv = Preferences::GetUint(aPref, &val);
if (NS_SUCCEEDED(rv)) {
aVal = static_cast<nsresult>(val);
} else if(rv == NS_ERROR_UNEXPECTED) {
// Preference does not exist
rv = NS_OK;
aVal = NS_OK;
}
return rv;
}
/* static */
nsresult
CameraPreferences::UpdatePref(const char* aPref, uint32_t& aVal)
{
uint32_t val;
nsresult rv = Preferences::GetUint(aPref, &val);
if (NS_SUCCEEDED(rv)) {
aVal = val;
} else if(rv == NS_ERROR_UNEXPECTED) {
// Preference does not exist
rv = NS_OK;
aVal = 0;
}
return rv;
}
/* static */
nsresult
CameraPreferences::UpdatePref(const char* aPref, nsACString& aVal)
{
nsCString val;
nsresult rv = Preferences::GetCString(aPref, &val);
if (NS_SUCCEEDED(rv)) {
aVal = val;
} else if(rv == NS_ERROR_UNEXPECTED) {
// Preference does not exist
rv = NS_OK;
aVal.Truncate();
}
return rv;
}
/* static */
nsresult
CameraPreferences::UpdatePref(const char* aPref, bool& aVal)
{
bool val;
nsresult rv = Preferences::GetBool(aPref, &val);
if (NS_SUCCEEDED(rv)) {
aVal = val;
} else if(rv == NS_ERROR_UNEXPECTED) {
// Preference does not exist
rv = NS_OK;
aVal = false;
}
return rv;
}
/* static */
CameraPreferences::Pref CameraPreferences::sPrefs[] = {
{
"camera.control.test.enabled",
kPrefValueIsCString,
{ &sPrefTestEnabled }
},
{
"camera.control.test.hardware",
kPrefValueIsCString,
{ &sPrefHardwareTest }
},
{
"camera.control.test.permission",
kPrefValueIsBoolean,
{ &sPrefCameraParametersPermission }
},
#ifdef MOZ_B2G
{
"camera.control.test.hardware.gonk.parameters",
kPrefValueIsCString,
{ &sPrefGonkParameters }
},
#endif
{
"camera.control.test.method.error",
kPrefValueIsNsResult,
{ &sPrefCameraControlMethodErrorOverride }
},
{
"camera.control.test.async.error",
kPrefValueIsNsResult,
{ &sPrefCameraControlAsyncErrorOverride }
},
{
"camera.control.test.is_low_memory",
kPrefValueIsBoolean,
{ &sPrefCameraParametersIsLowMemory }
},
{
"camera.control.low_memory_thresholdMB",
kPrefValueIsUint32,
{ &sPrefCameraControlLowMemoryThresholdMB }
},
};
/* static */
uint32_t
CameraPreferences::PrefToIndex(const char* aPref)
{
for (uint32_t i = 0; i < ArrayLength(sPrefs); ++i) {
if (strcmp(aPref, sPrefs[i].mPref) == 0) {
return i;
}
}
return kPrefNotFound;
}
/* static */
void
CameraPreferences::PreferenceChanged(const char* aPref, void* aClosure)
{
MonitorAutoLock mon(*sPrefMonitor);
uint32_t i = PrefToIndex(aPref);
if (i == kPrefNotFound) {
DOM_CAMERA_LOGE("Preference '%s' is not tracked by CameraPreferences\n", aPref);
return;
}
Pref& p = sPrefs[i];
nsresult rv;
switch (p.mValueType) {
case kPrefValueIsNsResult:
{
nsresult& v = *p.mValue.mAsNsResult;
rv = UpdatePref(aPref, v);
if (NS_SUCCEEDED(rv)) {
DOM_CAMERA_LOGI("Preference '%s' has changed, 0x%x\n", aPref, v);
}
}
break;
case kPrefValueIsUint32:
{
uint32_t& v = *p.mValue.mAsUint32;
rv = UpdatePref(aPref, v);
if (NS_SUCCEEDED(rv)) {
DOM_CAMERA_LOGI("Preference '%s' has changed, %u\n", aPref, v);
}
}
break;
case kPrefValueIsCString:
{
nsCString& v = **p.mValue.mAsCString;
rv = UpdatePref(aPref, v);
if (NS_SUCCEEDED(rv)) {
DOM_CAMERA_LOGI("Preference '%s' has changed, '%s'\n", aPref, v.get());
}
}
break;
case kPrefValueIsBoolean:
{
bool& v = *p.mValue.mAsBoolean;
rv = UpdatePref(aPref, v);
if (NS_SUCCEEDED(rv)) {
DOM_CAMERA_LOGI("Preference '%s' has changed, %s\n",
aPref, v ? "true" : "false");
}
}
break;
default:
MOZ_ASSERT_UNREACHABLE("Unhandled preference value type!");
return;
}
if (NS_FAILED(rv)) {
DOM_CAMERA_LOGE("Failed to get pref '%s' (0x%x)\n", aPref, rv);
}
}
/* static */
bool
CameraPreferences::Initialize()
{
DOM_CAMERA_LOGI("Initializing camera preference callbacks\n");
nsresult rv;
#ifdef MOZ_WIDGET_GONK
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
sObserver = new CameraPreferences();
rv = obs->AddObserver(sObserver, "init-camera-hw", false);
if (NS_WARN_IF(NS_FAILED(rv))) {
sObserver = nullptr;
}
} else {
DOM_CAMERA_LOGE("Could not get observer service\n");
}
#endif
sPrefMonitor = new Monitor("CameraPreferences.sPrefMonitor");
sPrefTestEnabled = new nsCString();
sPrefHardwareTest = new nsCString();
sPrefGonkParameters = new nsCString();
for (uint32_t i = 0; i < ArrayLength(sPrefs); ++i) {
rv = Preferences::RegisterCallbackAndCall(CameraPreferences::PreferenceChanged,
sPrefs[i].mPref);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
}
DOM_CAMERA_LOGI("Camera preferences initialized\n");
return true;
}
/* static */
void
CameraPreferences::Shutdown()
{
DOM_CAMERA_LOGI("Shutting down camera preference callbacks\n");
for (uint32_t i = 0; i < ArrayLength(sPrefs); ++i) {
Preferences::UnregisterCallback(CameraPreferences::PreferenceChanged,
sPrefs[i].mPref);
}
sPrefTestEnabled = nullptr;
sPrefHardwareTest = nullptr;
sPrefGonkParameters = nullptr;
sPrefMonitor = nullptr;
#ifdef MOZ_WIDGET_GONK
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
nsresult rv = obs->RemoveObserver(sObserver , "init-camera-hw");
if (NS_FAILED(rv)) {
DOM_CAMERA_LOGE("Failed to remove CameraPreferences observer (0x%x)\n", rv);
}
sObserver = nullptr;
} else {
DOM_CAMERA_LOGE("Could not get observer service\n");
}
#endif
DOM_CAMERA_LOGI("Camera preferences shut down\n");
}
#ifdef MOZ_WIDGET_GONK
nsresult
CameraPreferences::PreinitCameraHardware()
{
nsDOMCameraManager::PreinitCameraHardware();
return NS_OK;
}
NS_IMETHODIMP
CameraPreferences::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
{
if (strcmp(aTopic, "init-camera-hw") == 0) {
return PreinitCameraHardware();
}
DOM_CAMERA_LOGE("Got unhandled topic '%s'\n", aTopic);
return NS_OK;
}
#endif
/* static */
bool
CameraPreferences::GetPref(const char* aPref, nsACString& aVal)
{
MOZ_ASSERT(sPrefMonitor, "sPrefMonitor missing in CameraPreferences::GetPref()");
MonitorAutoLock mon(*sPrefMonitor);
uint32_t i = PrefToIndex(aPref);
if (i == kPrefNotFound || i >= ArrayLength(sPrefs)) {
DOM_CAMERA_LOGW("Preference '%s' is not tracked by CameraPreferences\n", aPref);
return false;
}
if (sPrefs[i].mValueType != kPrefValueIsCString) {
DOM_CAMERA_LOGW("Preference '%s' is not a string type\n", aPref);
return false;
}
StaticAutoPtr<nsCString>* s = sPrefs[i].mValue.mAsCString;
if (!*s) {
DOM_CAMERA_LOGE("Preference '%s' cache is not initialized\n", aPref);
return false;
}
if ((*s)->IsEmpty()) {
DOM_CAMERA_LOGI("Preference '%s' is not set\n", aPref);
return false;
}
DOM_CAMERA_LOGI("Preference '%s', got '%s'\n", aPref, (*s)->get());
aVal = **s;
return true;
}
/* static */
bool
CameraPreferences::GetPref(const char* aPref, nsresult& aVal)
{
MOZ_ASSERT(sPrefMonitor, "sPrefMonitor missing in CameraPreferences::GetPref()");
MonitorAutoLock mon(*sPrefMonitor);
uint32_t i = PrefToIndex(aPref);
if (i == kPrefNotFound || i >= ArrayLength(sPrefs)) {
DOM_CAMERA_LOGW("Preference '%s' is not tracked by CameraPreferences\n", aPref);
return false;
}
if (sPrefs[i].mValueType != kPrefValueIsNsResult) {
DOM_CAMERA_LOGW("Preference '%s' is not an nsresult type\n", aPref);
return false;
}
nsresult v = *sPrefs[i].mValue.mAsNsResult;
if (v == NS_OK) {
DOM_CAMERA_LOGW("Preference '%s' is not set\n", aPref);
return false;
}
DOM_CAMERA_LOGI("Preference '%s', got 0x%x\n", aPref, v);
aVal = v;
return true;
}
/* static */
bool
CameraPreferences::GetPref(const char* aPref, uint32_t& aVal)
{
MOZ_ASSERT(sPrefMonitor, "sPrefMonitor missing in CameraPreferences::GetPref()");
MonitorAutoLock mon(*sPrefMonitor);
uint32_t i = PrefToIndex(aPref);
if (i == kPrefNotFound || i >= ArrayLength(sPrefs)) {
DOM_CAMERA_LOGW("Preference '%s' is not tracked by CameraPreferences\n", aPref);
return false;
}
if (sPrefs[i].mValueType != kPrefValueIsUint32) {
DOM_CAMERA_LOGW("Preference '%s' is not a uint32_t type\n", aPref);
return false;
}
uint32_t v = *sPrefs[i].mValue.mAsUint32;
DOM_CAMERA_LOGI("Preference '%s', got %u\n", aPref, v);
aVal = v;
return true;
}
/* static */
bool
CameraPreferences::GetPref(const char* aPref, bool& aVal)
{
MOZ_ASSERT(sPrefMonitor, "sPrefMonitor missing in CameraPreferences::GetPref()");
MonitorAutoLock mon(*sPrefMonitor);
uint32_t i = PrefToIndex(aPref);
if (i == kPrefNotFound || i >= ArrayLength(sPrefs)) {
DOM_CAMERA_LOGW("Preference '%s' is not tracked by CameraPreferences\n", aPref);
return false;
}
if (sPrefs[i].mValueType != kPrefValueIsBoolean) {
DOM_CAMERA_LOGW("Preference '%s' is not a boolean type\n", aPref);
return false;
}
bool v = *sPrefs[i].mValue.mAsBoolean;
DOM_CAMERA_LOGI("Preference '%s', got %s\n", aPref, v ? "true" : "false");
aVal = v;
return true;
}