gecko-dev/dom/camera/DOMCameraCapabilities.cpp

405 строки
11 KiB
C++

/* 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 <cstring>
#include <cstdlib>
#include "base/basictypes.h"
#include "nsDOMClassInfo.h"
#include "jsapi.h"
#include "CameraRecorderProfiles.h"
#include "DOMCameraControl.h"
#include "DOMCameraCapabilities.h"
#include "CameraCommon.h"
using namespace mozilla;
using namespace mozilla::dom;
DOMCI_DATA(CameraCapabilities, nsICameraCapabilities)
NS_INTERFACE_MAP_BEGIN(DOMCameraCapabilities)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsICameraCapabilities)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CameraCapabilities)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(DOMCameraCapabilities)
NS_IMPL_RELEASE(DOMCameraCapabilities)
static nsresult
ParseZoomRatioItemAndAdd(JSContext* aCx, JSObject* aArray, uint32_t aIndex, const char* aStart, char** aEnd)
{
if (!*aEnd) {
// make 'aEnd' follow the same semantics as strchr().
aEnd = nullptr;
}
/**
* The by-100 divisor is Gonk-specific. For now, assume other platforms
* return actual fractional multipliers.
*/
double d = strtod(aStart, aEnd);
#if MOZ_WIDGET_GONK
d /= 100;
#endif
jsval v = JS_NumberValue(d);
if (!JS_SetElement(aCx, aArray, aIndex, &v)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
static nsresult
ParseStringItemAndAdd(JSContext* aCx, JSObject* aArray, uint32_t aIndex, const char* aStart, char** aEnd)
{
JSString* s;
if (*aEnd) {
s = JS_NewStringCopyN(aCx, aStart, *aEnd - aStart);
} else {
s = JS_NewStringCopyZ(aCx, aStart);
}
if (!s) {
return NS_ERROR_OUT_OF_MEMORY;
}
jsval v = STRING_TO_JSVAL(s);
if (!JS_SetElement(aCx, aArray, aIndex, &v)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
static nsresult
ParseDimensionItemAndAdd(JSContext* aCx, JSObject* aArray, uint32_t aIndex, const char* aStart, char** aEnd)
{
char* x;
if (!*aEnd) {
// make 'aEnd' follow the same semantics as strchr().
aEnd = nullptr;
}
jsval w = INT_TO_JSVAL(strtol(aStart, &x, 10));
jsval h = INT_TO_JSVAL(strtol(x + 1, aEnd, 10));
JSObject* o = JS_NewObject(aCx, nullptr, nullptr, nullptr);
if (!o) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (!JS_SetProperty(aCx, o, "width", &w)) {
return NS_ERROR_FAILURE;
}
if (!JS_SetProperty(aCx, o, "height", &h)) {
return NS_ERROR_FAILURE;
}
jsval v = OBJECT_TO_JSVAL(o);
if (!JS_SetElement(aCx, aArray, aIndex, &v)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult
DOMCameraCapabilities::ParameterListToNewArray(JSContext* aCx, JSObject** aArray, uint32_t aKey, ParseItemAndAddFunc aParseItemAndAdd)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
const char* value = mCamera->GetParameterConstChar(aKey);
if (!value) {
// in case we get nonsense data back
*aArray = nullptr;
return NS_OK;
}
*aArray = JS_NewArrayObject(aCx, 0, nullptr);
if (!*aArray) {
return NS_ERROR_OUT_OF_MEMORY;
}
const char* p = value;
uint32_t index = 0;
nsresult rv;
char* q;
while (p) {
/**
* In C's string.h, strchr() is declared as returning 'char*'; in C++'s
* cstring, it is declared as returning 'const char*', _except_ in MSVC,
* where the C version is declared to return const like the C++ version.
*
* Unfortunately, for both cases, strtod() and strtol() take a 'char**' as
* the end-of-conversion pointer, so we need to cast away strchr()'s
* const-ness here to make the MSVC build everything happy.
*/
q = const_cast<char*>(strchr(p, ','));
if (q != p) { // skip consecutive delimiters, just in case
rv = aParseItemAndAdd(aCx, *aArray, index, p, &q);
NS_ENSURE_SUCCESS(rv, rv);
++index;
}
p = q;
if (p) {
++p;
}
}
return JS_FreezeObject(aCx, *aArray) ? NS_OK : NS_ERROR_FAILURE;
}
nsresult
DOMCameraCapabilities::StringListToNewObject(JSContext* aCx, JS::Value* aArray, uint32_t aKey)
{
JSObject* array;
nsresult rv = ParameterListToNewArray(aCx, &array, aKey, ParseStringItemAndAdd);
NS_ENSURE_SUCCESS(rv, rv);
*aArray = OBJECT_TO_JSVAL(array);
return NS_OK;
}
nsresult
DOMCameraCapabilities::DimensionListToNewObject(JSContext* aCx, JS::Value* aArray, uint32_t aKey)
{
JSObject* array;
nsresult rv;
rv = ParameterListToNewArray(aCx, &array, aKey, ParseDimensionItemAndAdd);
NS_ENSURE_SUCCESS(rv, rv);
*aArray = OBJECT_TO_JSVAL(array);
return NS_OK;
}
/* readonly attribute jsval previewSizes; */
NS_IMETHODIMP
DOMCameraCapabilities::GetPreviewSizes(JSContext* cx, JS::Value* aPreviewSizes)
{
return DimensionListToNewObject(cx, aPreviewSizes, CAMERA_PARAM_SUPPORTED_PREVIEWSIZES);
}
/* readonly attribute jsval pictureSizes; */
NS_IMETHODIMP
DOMCameraCapabilities::GetPictureSizes(JSContext* cx, JS::Value* aPictureSizes)
{
return DimensionListToNewObject(cx, aPictureSizes, CAMERA_PARAM_SUPPORTED_PICTURESIZES);
}
/* readonly attribute jsval fileFormats; */
NS_IMETHODIMP
DOMCameraCapabilities::GetFileFormats(JSContext* cx, JS::Value* aFileFormats)
{
return StringListToNewObject(cx, aFileFormats, CAMERA_PARAM_SUPPORTED_PICTUREFORMATS);
}
/* readonly attribute jsval whiteBalanceModes; */
NS_IMETHODIMP
DOMCameraCapabilities::GetWhiteBalanceModes(JSContext* cx, JS::Value* aWhiteBalanceModes)
{
return StringListToNewObject(cx, aWhiteBalanceModes, CAMERA_PARAM_SUPPORTED_WHITEBALANCES);
}
/* readonly attribute jsval sceneModes; */
NS_IMETHODIMP
DOMCameraCapabilities::GetSceneModes(JSContext* cx, JS::Value* aSceneModes)
{
return StringListToNewObject(cx, aSceneModes, CAMERA_PARAM_SUPPORTED_SCENEMODES);
}
/* readonly attribute jsval effects; */
NS_IMETHODIMP
DOMCameraCapabilities::GetEffects(JSContext* cx, JS::Value* aEffects)
{
return StringListToNewObject(cx, aEffects, CAMERA_PARAM_SUPPORTED_EFFECTS);
}
/* readonly attribute jsval flashModes; */
NS_IMETHODIMP
DOMCameraCapabilities::GetFlashModes(JSContext* cx, JS::Value* aFlashModes)
{
return StringListToNewObject(cx, aFlashModes, CAMERA_PARAM_SUPPORTED_FLASHMODES);
}
/* readonly attribute jsval focusModes; */
NS_IMETHODIMP
DOMCameraCapabilities::GetFocusModes(JSContext* cx, JS::Value* aFocusModes)
{
return StringListToNewObject(cx, aFocusModes, CAMERA_PARAM_SUPPORTED_FOCUSMODES);
}
/* readonly attribute long maxFocusAreas; */
NS_IMETHODIMP
DOMCameraCapabilities::GetMaxFocusAreas(JSContext* cx, int32_t* aMaxFocusAreas)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
const char* value = mCamera->GetParameterConstChar(CAMERA_PARAM_SUPPORTED_MAXFOCUSAREAS);
if (!value) {
// in case we get nonsense data back
*aMaxFocusAreas = 0;
return NS_OK;
}
*aMaxFocusAreas = atoi(value);
return NS_OK;
}
/* readonly attribute double minExposureCompensation; */
NS_IMETHODIMP
DOMCameraCapabilities::GetMinExposureCompensation(JSContext* cx, double* aMinExposureCompensation)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
const char* value = mCamera->GetParameterConstChar(CAMERA_PARAM_SUPPORTED_MINEXPOSURECOMPENSATION);
if (!value) {
// in case we get nonsense data back
*aMinExposureCompensation = 0;
return NS_OK;
}
*aMinExposureCompensation = atof(value);
return NS_OK;
}
/* readonly attribute double maxExposureCompensation; */
NS_IMETHODIMP
DOMCameraCapabilities::GetMaxExposureCompensation(JSContext* cx, double* aMaxExposureCompensation)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
const char* value = mCamera->GetParameterConstChar(CAMERA_PARAM_SUPPORTED_MAXEXPOSURECOMPENSATION);
if (!value) {
// in case we get nonsense data back
*aMaxExposureCompensation = 0;
return NS_OK;
}
*aMaxExposureCompensation = atof(value);
return NS_OK;
}
/* readonly attribute double stepExposureCompensation; */
NS_IMETHODIMP
DOMCameraCapabilities::GetStepExposureCompensation(JSContext* cx, double* aStepExposureCompensation)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
const char* value = mCamera->GetParameterConstChar(CAMERA_PARAM_SUPPORTED_EXPOSURECOMPENSATIONSTEP);
if (!value) {
// in case we get nonsense data back
*aStepExposureCompensation = 0;
return NS_OK;
}
*aStepExposureCompensation = atof(value);
return NS_OK;
}
/* readonly attribute long maxMeteringAreas; */
NS_IMETHODIMP
DOMCameraCapabilities::GetMaxMeteringAreas(JSContext* cx, int32_t* aMaxMeteringAreas)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
const char* value = mCamera->GetParameterConstChar(CAMERA_PARAM_SUPPORTED_MAXMETERINGAREAS);
if (!value) {
// in case we get nonsense data back
*aMaxMeteringAreas = 0;
return NS_OK;
}
*aMaxMeteringAreas = atoi(value);
return NS_OK;
}
/* readonly attribute jsval zoomRatios; */
NS_IMETHODIMP
DOMCameraCapabilities::GetZoomRatios(JSContext* cx, JS::Value* aZoomRatios)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
const char* value = mCamera->GetParameterConstChar(CAMERA_PARAM_SUPPORTED_ZOOM);
if (!value || strcmp(value, "true") != 0) {
// if zoom is not supported, return a null object
*aZoomRatios = JSVAL_NULL;
return NS_OK;
}
JSObject* array;
nsresult rv = ParameterListToNewArray(cx, &array, CAMERA_PARAM_SUPPORTED_ZOOMRATIOS, ParseZoomRatioItemAndAdd);
NS_ENSURE_SUCCESS(rv, rv);
*aZoomRatios = OBJECT_TO_JSVAL(array);
return NS_OK;
}
/* readonly attribute jsval videoSizes; */
NS_IMETHODIMP
DOMCameraCapabilities::GetVideoSizes(JSContext* cx, JS::Value* aVideoSizes)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
nsTArray<mozilla::idl::CameraSize> sizes;
nsresult rv = mCamera->GetVideoSizes(sizes);
NS_ENSURE_SUCCESS(rv, rv);
if (sizes.Length() == 0) {
// video recording not supported, return a null object
*aVideoSizes = JSVAL_NULL;
return NS_OK;
}
JSObject* array = JS_NewArrayObject(cx, 0, nullptr);
if (!array) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < sizes.Length(); ++i) {
JSObject* o = JS_NewObject(cx, nullptr, nullptr, nullptr);
jsval v = INT_TO_JSVAL(sizes[i].width);
if (!JS_SetProperty(cx, o, "width", &v)) {
return NS_ERROR_FAILURE;
}
v = INT_TO_JSVAL(sizes[i].height);
if (!JS_SetProperty(cx, o, "height", &v)) {
return NS_ERROR_FAILURE;
}
v = OBJECT_TO_JSVAL(o);
if (!JS_SetElement(cx, array, i, &v)) {
return NS_ERROR_FAILURE;
}
}
*aVideoSizes = OBJECT_TO_JSVAL(array);
return NS_OK;
}
/* readonly attribute jsval recorderProfiles; */
NS_IMETHODIMP
DOMCameraCapabilities::GetRecorderProfiles(JSContext* cx, JS::Value* aRecorderProfiles)
{
NS_ENSURE_TRUE(mCamera, NS_ERROR_NOT_AVAILABLE);
nsRefPtr<RecorderProfileManager> profileMgr = mCamera->GetRecorderProfileManager();
if (!profileMgr) {
*aRecorderProfiles = JSVAL_NULL;
return NS_OK;
}
JSObject* o = nullptr; // keeps the compiler from emitting a warning
nsresult rv = profileMgr->GetJsObject(cx, &o);
NS_ENSURE_SUCCESS(rv, rv);
*aRecorderProfiles = OBJECT_TO_JSVAL(o);
return NS_OK;
}