Maarten Lankhorst : avifile: Fix playback of fixed sample size audio streams.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bfe9e6d74c833b485116bb51bb3196daf661b332
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=bfe9e6d74c833b485116bb51bb...

Author: Maarten Lankhorst <m.b.lankhorst(a)gmail.com>
Date:   Wed Jan 20 01:08:31 2010 +0100

avifile: Fix playback of fixed sample size audio streams.

---

 dlls/avifil32/avifile.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/dlls/avifil32/avifile.c b/dlls/avifil32/avifile.c
index c034a6b..e627196 100644
--- a/dlls/avifil32/avifile.c
+++ b/dlls/avifil32/avifile.c
@@ -1087,6 +1087,15 @@ static HRESULT WINAPI IAVIStream_fnRead(IAVIStream *iface, LONG start,
     LONG block = start;
     LONG offset = 0;
 
+    if (!buffer)
+    {
+      if (bytesread)
+        *bytesread = samples*This->sInfo.dwSampleSize;
+      if (samplesread)
+        *samplesread = samples;
+      return AVIERR_OK;
+    }
+
     /* convert start sample to block,offset pair */
     AVIFILE_SamplesToBlock(This, &block, &offset);