diff mbox

[v2] audio: fix integer overflow expression

Message ID 1306867221-13535-1-git-send-email-peter.maydell@linaro.org
State Accepted
Headers show

Commit Message

Peter Maydell May 31, 2011, 6:40 p.m. UTC 
From: Juha Riihimäki <juha.riihimaki@nokia.com>

Fix an integer overflow that can happen for signed 32 bit types
when using FLOAT_MIXENG. (Note that at the moment this is only true
when using the MacOSX coreaudio audio driver.)

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Peter Maydell: Removed unnecessary casts]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
v1->v2 : as suggested by Malc, removed one unnecessary cast
from each change.

 audio/mixeng_template.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

Comments

malc May 31, 2011, 8:14 p.m. UTC | #1 
On Tue, 31 May 2011, Peter Maydell wrote:

> From: Juha Riihim?ki <juha.riihimaki@nokia.com>
> 
> Fix an integer overflow that can happen for signed 32 bit types
> when using FLOAT_MIXENG. (Note that at the moment this is only true
> when using the MacOSX coreaudio audio driver.)
> 
> Signed-off-by: Juha Riihim?ki <juha.riihimaki@nokia.com>
> [Peter Maydell: Removed unnecessary casts]
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> v1->v2 : as suggested by Malc, removed one unnecessary cast
> from each change.

Applied with minor stylistic change, thanks to all involved.

[..snip..]
diff mbox

Patch

diff --git a/audio/mixeng_template.h b/audio/mixeng_template.h
index a2d0ef8..a38055c 100644
--- a/audio/mixeng_template.h
+++ b/audio/mixeng_template.h
@@ -46,7 +46,7 @@  static mixeng_real inline glue (conv_, ET) (IN_T v)
 #endif
 #else  /* !RECIPROCAL */
 #ifdef SIGNED
-    return nv / (mixeng_real) (IN_MAX - IN_MIN);
+    return nv / (mixeng_real) ((mixeng_real)IN_MAX - IN_MIN);
 #else
     return (nv - HALF) / (mixeng_real) IN_MAX;
 #endif
@@ -63,7 +63,7 @@  static IN_T inline glue (clip_, ET) (mixeng_real v)
     }
 
 #ifdef SIGNED
-    return ENDIAN_CONVERT ((IN_T) (v * (IN_MAX - IN_MIN)));
+    return ENDIAN_CONVERT ((IN_T) (v * ((mixeng_real)IN_MAX - IN_MIN)));
 #else
     return ENDIAN_CONVERT ((IN_T) ((v * IN_MAX) + HALF));
 #endif