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Added white balance settings to the camera Emulator.

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- Added the white balance control to the fake camera.

Change-Id: I5ada253a3ae7195ca5625a3601c9e4ed819fa2cc
This commit is contained in:
Christine Chen
2011-10-18 17:43:52 -07:00
parent 61533d2fe7
commit 12c0b21abe
6 changed files with 165 additions and 24 deletions
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45
tools/emulator/system/camera/EmulatedCameraDevice.cpp
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@@ -29,25 +29,33 @@
#include <sys/select.h>
#include <cmath>
#include "EmulatedCameraDevice.h"
#include "Converters.h"
namespace android {
const float GAMMA_CORRECTION = 2.2f;
EmulatedCameraDevice::EmulatedCameraDevice(EmulatedCamera* camera_hal)
: mObjectLock(),
mCurFrameTimestamp(0),
mCameraHAL(camera_hal),
mCurrentFrame(NULL),
mExposureCompensation(1.0f),
mWhiteBalanceScale(NULL),
mSupportedWhiteBalanceScale(),
mState(ECDS_CONSTRUCTED)
{
}
EmulatedCameraDevice::~EmulatedCameraDevice()
{
LOGV("EmulatedCameraDevice destructor");
if (mCurrentFrame != NULL) {
delete[] mCurrentFrame;
}
for (int i = 0; i < mSupportedWhiteBalanceScale.size(); ++i) {
if (mSupportedWhiteBalanceScale.valueAt(i) != NULL) {
delete[] mSupportedWhiteBalanceScale.valueAt(i);
}
}
}
/****************************************************************************
@@ -110,10 +118,43 @@ void EmulatedCameraDevice::setExposureCompensation(const float ev) {
LOGW("%s: Fake camera device is not started.", __FUNCTION__);
}
mExposureCompensation = std::pow(2.0f, ev);
mExposureCompensation = std::pow(2.0f, ev / GAMMA_CORRECTION);
LOGV("New exposure compensation is %f", mExposureCompensation);
}
void EmulatedCameraDevice::initializeWhiteBalanceModes(const char* mode,
const float r_scale,
const float b_scale) {
LOGV("%s with %s, %f, %f", __FUNCTION__, mode, r_scale, b_scale);
float* value = new float[3];
value[0] = r_scale; value[1] = 1.0f; value[2] = b_scale;
mSupportedWhiteBalanceScale.add(String8(mode), value);
}
void EmulatedCameraDevice::setWhiteBalanceMode(const char* mode) {
LOGV("%s with white balance %s", __FUNCTION__, mode);
mWhiteBalanceScale =
mSupportedWhiteBalanceScale.valueFor(String8(mode));
}
/* Computes the pixel value after adjusting the white balance to the current
* one. The input the y, u, v channel of the pixel and the adjusted value will
* be stored in place. The adjustment is done in RGB space.
*/
void EmulatedCameraDevice::changeWhiteBalance(uint8_t& y,
uint8_t& u,
uint8_t& v) const {
float r_scale = mWhiteBalanceScale[0];
float b_scale = mWhiteBalanceScale[2];
int r = static_cast<float>(YUV2R(y, u, v)) / r_scale;
int g = YUV2G(y, u, v);
int b = static_cast<float>(YUV2B(y, u, v)) / b_scale;
y = RGB2Y(r, g, b);
u = RGB2U(r, g, b);
v = RGB2V(r, g, b);
}
status_t EmulatedCameraDevice::getCurrentPreviewFrame(void* buffer)
{
if (!isStarted()) {