From: Mathias Agopian <mathias@google.com>
Date: Fri, 26 Jun 2009 00:38:50 +0000 (-0700)
Subject: add support for YUV formats
X-Git-Tag: android-x86-2.2~56^2~1
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=8bf1f752686a228256e2f3c29a374d76f42b126b;p=android-x86%2Fhardware-libhardware.git

add support for YUV formats
---

diff --git a/modules/gralloc/gralloc.cpp b/modules/gralloc/gralloc.cpp
index ccfe40b..3441eff 100644
--- a/modules/gralloc/gralloc.cpp
+++ b/modules/gralloc/gralloc.cpp
@@ -294,32 +294,52 @@ static int gralloc_alloc(alloc_device_t* dev,
     if (!pHandle || !pStride)
         return -EINVAL;
 
-    int align = 4;
-    int bpp = 0;
-    switch (format) {
-        case HAL_PIXEL_FORMAT_RGBA_8888:
-        case HAL_PIXEL_FORMAT_BGRA_8888:
-            bpp = 4;
-            break;
-        case HAL_PIXEL_FORMAT_RGB_565:
-        case HAL_PIXEL_FORMAT_RGBA_5551:
-        case HAL_PIXEL_FORMAT_RGBA_4444:
-            bpp = 2;
-            break;
-        default:
-            return -EINVAL;
+    size_t size, stride;
+    if (format == HAL_PIXEL_FORMAT_YCbCr_420_SP || 
+            format == HAL_PIXEL_FORMAT_YCbCr_422_SP) 
+    {
+        // FIXME: there is no way to return the vstride
+        int vstride;
+        stride = (w + 1) & ~1; 
+        switch (format) {
+            case HAL_PIXEL_FORMAT_YCbCr_420_SP:
+                size = stride * h * 2;
+                break;
+            case HAL_PIXEL_FORMAT_YCbCr_422_SP:
+                vstride = (h+1) & ~1;
+                size = (stride * vstride) + (w/2 * h/2) * 2;
+                break;
+            default:
+                return -EINVAL;
+        }
+    } else {
+        int align = 4;
+        int bpp = 0;
+        switch (format) {
+            case HAL_PIXEL_FORMAT_RGBA_8888:
+            case HAL_PIXEL_FORMAT_BGRA_8888:
+                bpp = 4;
+                break;
+            case HAL_PIXEL_FORMAT_RGB_565:
+            case HAL_PIXEL_FORMAT_RGBA_5551:
+            case HAL_PIXEL_FORMAT_RGBA_4444:
+                bpp = 2;
+                break;
+            default:
+                return -EINVAL;
+        }
+        size_t bpr = (w*bpp + (align-1)) & ~(align-1);
+        size = bpr * h;
+        stride = bpr / bpp;
     }
 
-    size_t bpr = (w*bpp + (align-1)) & ~(align-1);
-    size_t size = bpr * h;
-    size_t stride = bpr / bpp;
-
     int err;
     if (usage & GRALLOC_USAGE_HW_FB) {
         err = gralloc_alloc_framebuffer(dev, size, usage, pHandle);
     } else {
         err = gralloc_alloc_buffer(dev, size, usage, pHandle);
     }
+
     if (err < 0) {
         return err;
     }