1 files changed, 92 insertions, 0 deletions
diff --git a/camera/CameraHalCommon.cpp b/camera/CameraHalCommon.cpp
index 1cad4cb..ff460f9 100644
--- a/camera/CameraHalCommon.cpp
+++ b/camera/CameraHalCommon.cpp
@@ -117,5 +117,97 @@ void CameraHal::PPM(const char* str, struct timeval* ppm_first, ...){
 
 #endif
 
+
+/** Common utility function definitions used all over the HAL */
+
+unsigned int CameraHal::getBPP(const char* format) {
+    unsigned int bytesPerPixel;
+
+   // Calculate bytes per pixel based on the pixel format
+   if (strcmp(format, android::CameraParameters::PIXEL_FORMAT_YUV422I) == 0) {
+       bytesPerPixel = 2;
+   } else if (strcmp(format, android::CameraParameters::PIXEL_FORMAT_RGB565) == 0 ||
+              strcmp(format, android::CameraParameters::PIXEL_FORMAT_BAYER_RGGB) == 0) {
+       bytesPerPixel = 2;
+   } else if (strcmp(format, android::CameraParameters::PIXEL_FORMAT_YUV420SP) == 0) {
+       bytesPerPixel = 1;
+   } else {
+       bytesPerPixel = 1;
+   }
+
+   return bytesPerPixel;
+}
+
+void CameraHal::getXYFromOffset(unsigned int *x, unsigned int *y,
+                                unsigned int offset, unsigned int stride,
+                                const char* format)
+{
+   CAMHAL_ASSERT( x && y && format && (0U < stride) );
+
+   *x = (offset % stride) / getBPP(format);
+   *y = (offset / stride);
+}
+
+const char* CameraHal::getPixelFormatConstant(const char* parametersFormat)
+{
+    const char *pixelFormat = NULL;
+
+    if ( NULL != parametersFormat ) {
+        if ( 0 == strcmp(parametersFormat, (const char *) android::CameraParameters::PIXEL_FORMAT_YUV422I) ) {
+            CAMHAL_LOGVA("CbYCrY format selected");
+            pixelFormat = (const char *) android::CameraParameters::PIXEL_FORMAT_YUV422I;
+        } else if ( (0 == strcmp(parametersFormat, (const char *) android::CameraParameters::PIXEL_FORMAT_YUV420SP)) ||
+                    (0 == strcmp(parametersFormat, (const char *) android::CameraParameters::PIXEL_FORMAT_YUV420P)) ) {
+            // TODO(XXX): We are treating YV12 the same as YUV420SP
+            CAMHAL_LOGVA("YUV420SP format selected");
+            pixelFormat = (const char *) android::CameraParameters::PIXEL_FORMAT_YUV420SP;
+        } else if ( 0 == strcmp(parametersFormat, (const char *) android::CameraParameters::PIXEL_FORMAT_RGB565) ) {
+            CAMHAL_LOGVA("RGB565 format selected");
+            pixelFormat = (const char *) android::CameraParameters::PIXEL_FORMAT_RGB565;
+        } else if ( 0 == strcmp(parametersFormat, (const char *) android::CameraParameters::PIXEL_FORMAT_BAYER_RGGB) ) {
+            CAMHAL_LOGVA("BAYER format selected");
+            pixelFormat = (const char *) android::CameraParameters::PIXEL_FORMAT_BAYER_RGGB;
+        } else if ( 0 == strcmp(parametersFormat, android::CameraParameters::PIXEL_FORMAT_JPEG) ) {
+            CAMHAL_LOGVA("JPEG format selected");
+            pixelFormat = (const char *) android::CameraParameters::PIXEL_FORMAT_JPEG;
+        } else {
+            CAMHAL_LOGEA("Invalid format, NV12 format selected as default");
+            pixelFormat = (const char *) android::CameraParameters::PIXEL_FORMAT_YUV420SP;
+        }
+    } else {
+        CAMHAL_LOGEA("Preview format is NULL, defaulting to NV12");
+        pixelFormat = (const char *) android::CameraParameters::PIXEL_FORMAT_YUV420SP;
+    }
+
+    return pixelFormat;
+}
+
+size_t CameraHal::calculateBufferSize(const char* parametersFormat, int width, int height)
+{
+    int bufferSize = -1;
+
+    if ( NULL != parametersFormat ) {
+        if ( 0 == strcmp(parametersFormat, (const char *) android::CameraParameters::PIXEL_FORMAT_YUV422I) ) {
+            bufferSize = width * height * 2;
+        } else if ( (0 == strcmp(parametersFormat, android::CameraParameters::PIXEL_FORMAT_YUV420SP)) ||
+                    (0 == strcmp(parametersFormat, android::CameraParameters::PIXEL_FORMAT_YUV420P)) ) {
+            bufferSize = width * height * 3 / 2;
+        } else if ( 0 == strcmp(parametersFormat, (const char *) android::CameraParameters::PIXEL_FORMAT_RGB565) ) {
+            bufferSize = width * height * 2;
+        } else if ( 0 == strcmp(parametersFormat, (const char *) android::CameraParameters::PIXEL_FORMAT_BAYER_RGGB) ) {
+            bufferSize = width * height * 2;
+        } else {
+            CAMHAL_LOGEA("Invalid format");
+            bufferSize = 0;
+        }
+    } else {
+        CAMHAL_LOGEA("Preview format is NULL");
+        bufferSize = 0;
+    }
+
+    return bufferSize;
+}
+
+
 } // namespace Camera
 } // namespace Ti