void prepareCacheForYUV420i(int width, int height);
static bool convertYUV420i2Grey(int width, int height, const unsigned char* yuv, cv::Mat& resmat);
- static bool convertYUV420i2BGR888(int width, int height, const unsigned char* yuv, cv::Mat& resmat, bool inRGBorder);
+ static bool convertYUV420i2BGR(int width, int height, const unsigned char* yuv, cv::Mat& resmat, bool inRGBorder, bool withAlpha);
friend class HighguiAndroidCameraActivity;
};
{
switch(outputType)
{
- case CV_CAP_ANDROID_COLOR_FRAME:
- if (!m_hasColor)
- if (!(m_hasColor = convertYUV420i2BGR888(m_width, m_height, current_frameYUV420i, m_frameColor.mat, false)))
- return NULL;
- image = m_frameColor.getIplImagePtr();
- break;
case CV_CAP_ANDROID_GREY_FRAME:
if (!m_hasGray)
if (!(m_hasGray = convertYUV420i2Grey(m_width, m_height, current_frameYUV420i, m_frameGray.mat)))
return NULL;
image = m_frameGray.getIplImagePtr();
break;
- case CV_CAP_ANDROID_COLOR_FRAME_RGB:
+ case CV_CAP_ANDROID_COLOR_FRAME_BGR: case CV_CAP_ANDROID_COLOR_FRAME_RGB:
+ if (!m_hasColor)
+ if (!(m_hasColor = convertYUV420i2BGR(m_width, m_height, current_frameYUV420i, m_frameColor.mat, outputType == CV_CAP_ANDROID_COLOR_FRAME_RGB, false)))
+ return NULL;
+ image = m_frameColor.getIplImagePtr();
+ break;
+ case CV_CAP_ANDROID_COLOR_FRAME_BGRA: case CV_CAP_ANDROID_COLOR_FRAME_RGBA:
if (!m_hasColor)
- if (!(m_hasColor = convertYUV420i2BGR888(m_width, m_height, current_frameYUV420i, m_frameColor.mat, true)))
+ if (!(m_hasColor = convertYUV420i2BGR(m_width, m_height, current_frameYUV420i, m_frameColor.mat, outputType == CV_CAP_ANDROID_COLOR_FRAME_RGBA, true)))
return NULL;
image = m_frameColor.getIplImagePtr();
break;
}
}
-inline unsigned char clamp(int value)
-{
- if (value <= 0)
- return 0;
- if (value >= 255)
- return (unsigned char)255;
- return (unsigned char)value;
-}
-
-
bool CvCapture_Android::convertYUV420i2Grey(int width, int height, const unsigned char* yuv, cv::Mat& resmat)
{
if (yuv == 0) return false;
-
+#define ALWAYS_COPY_GRAY 0
+#if ALWAYS_COPY_GRAY
resmat.create(height, width, CV_8UC1);
unsigned char* matBuff = resmat.ptr<unsigned char> (0);
memcpy(matBuff, yuv, width * height);
+#else
+ resmat = cv::Mat(height, width, CV_8UC1, (void*)yuv);
+#endif
return !resmat.empty();
}
-template<int R>
-struct YUV420i2BGR888Invoker
-{
- cv::Mat& dst;
- unsigned char* my1, *muv;
- int width;
-
- YUV420i2BGR888Invoker(cv::Mat& _dst, int _width, unsigned char* _y1, unsigned char* _uv)
- : dst(_dst), my1(_y1), muv(_uv), width(_width) {}
-
- void operator()(const cv::BlockedRange& range) const
- {
- //B = 1.164(Y - 16) + 2.018(U - 128)
- //G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128)
- //R = 1.164(Y - 16) + 1.596(V - 128)
-
- unsigned char* y1 = my1 + range.begin() * width, *uv = muv + range.begin() * width / 2;
-
- for (int j = range.begin(); j < range.end(); j+=2, y1+=width*2, uv+=width)
- {
- unsigned char* row1 = dst.ptr<unsigned char>(j);
- unsigned char* row2 = dst.ptr<unsigned char>(j+1);
- unsigned char* y2 = y1 + width;
-
- for(int i = 0; i < width; i+=2,row1+=6,row2+=6)
- {
- int cr = uv[i] - 128;
- int cb = uv[i+1] - 128;
-
- int ruv = 409 * cr + 128;
- int guv = 128 - 100 * cb - 208 * cr;
- int buv = 516 * cb + 128;
-
- int y00 = (y1[i] - 16) * 298;
- row1[0+R] = clamp((y00 + buv) >> 8);
- row1[1] = clamp((y00 + guv) >> 8);
- row1[2-R] = clamp((y00 + ruv) >> 8);
-
- int y01 = (y1[i+1] - 16) * 298;
- row1[3+R] = clamp((y01 + buv) >> 8);
- row1[4] = clamp((y01 + guv) >> 8);
- row1[5-R] = clamp((y01 + ruv) >> 8);
-
- int y10 = (y2[i] - 16) * 298;
- row2[0+R] = clamp((y10 + buv) >> 8);
- row2[1] = clamp((y10 + guv) >> 8);
- row2[2-R] = clamp((y10 + ruv) >> 8);
-
- int y11 = (y2[i+1] - 16) * 298;
- row2[3+R] = clamp((y11 + buv) >> 8);
- row2[4] = clamp((y11 + guv) >> 8);
- row2[5-R] = clamp((y11 + ruv) >> 8);
- }
- }
- }
-};
-
-bool CvCapture_Android::convertYUV420i2BGR888(int width, int height, const unsigned char* yuv, cv::Mat& resmat, bool inRGBorder)
+bool CvCapture_Android::convertYUV420i2BGR(int width, int height, const unsigned char* yuv, cv::Mat& resmat, bool inRGBorder, bool withAlpha)
{
if (yuv == 0) return false;
CV_Assert(width % 2 == 0 && height % 2 == 0);
- resmat.create(height, width, CV_8UC3);
-
- unsigned char* y1 = (unsigned char*)yuv;
- unsigned char* uv = y1 + width * height;
+ cv::Mat src(height*3/2, width, CV_8UC1, (void*)yuv);
-#ifdef HAVE_TEGRA_OPTIMIZATION
-#warning "TEGRA OPTIMIZED YUV420i TO RGB888 CONVERSION IS USED"
- if (!tegra::YUV420i2BGR888(width, height, y1, uv, resmat, inRGBorder))
-#endif
- {
- if (inRGBorder)
- cv::parallel_for(cv::BlockedRange(0, height, 2), YUV420i2BGR888Invoker<2>(resmat, width, y1, uv));
- else
- cv::parallel_for(cv::BlockedRange(0, height, 2), YUV420i2BGR888Invoker<0>(resmat, width, y1, uv));
- }
+ cv::cvtColor(src, resmat, inRGBorder ? CV_YUV420i2RGB : CV_YUV420i2BGR, withAlpha ? 4 : 3);
return !resmat.empty();
}