[PATCH 1/5] mfplat/buffer: Use absolute pitch in memory_1d_2d_buffer_[Un]Lock().

[Paul Gofman]

From: Paul Gofman

---
 dlls/mfplat/buffer.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/dlls/mfplat/buffer.c b/dlls/mfplat/buffer.c
index cb1b3176a08..52d05f4ef80 100644
--- a/dlls/mfplat/buffer.c
+++ b/dlls/mfplat/buffer.c
@@ -313,8 +313,14 @@ static HRESULT WINAPI memory_1d_2d_buffer_Lock(IMFMediaBuffer *iface, BYTE **dat
             hr = E_OUTOFMEMORY;

if (SUCCEEDED(hr))
-            copy_image(buffer, buffer->_2d.linear_buffer, buffer->_2d.width, buffer->data, buffer->_2d.pitch,
+        {
+            int pitch = buffer->_2d.pitch;
+
+            if (pitch < 0)
+                pitch = -pitch;
+            copy_image(buffer, buffer->_2d.linear_buffer, buffer->_2d.width, buffer->data, pitch,
                     buffer->_2d.width, buffer->_2d.height);
+        }
     }

if (SUCCEEDED(hr))
@@ -342,7 +348,11 @@ static HRESULT WINAPI memory_1d_2d_buffer_Unlock(IMFMediaBuffer *iface)

if (buffer->_2d.linear_buffer && !--buffer->_2d.locks)
     {
-        copy_image(buffer, buffer->data, buffer->_2d.pitch, buffer->_2d.linear_buffer, buffer->_2d.width,
+        int pitch = buffer->_2d.pitch;
+
+        if (pitch < 0)
+            pitch = -pitch;
+        copy_image(buffer, buffer->data, pitch, buffer->_2d.linear_buffer, buffer->_2d.width,
                 buffer->_2d.width, buffer->_2d.height);

free(buffer->_2d.linear_buffer);