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fixed crash when changing to a errornous sounddevice (i.e. the change from wav-writer to directsound which returned E-Fail)

This commit is contained in:
mightymax 2007-01-09 16:30:41 +00:00
parent bdfb144695
commit 629f89e81b
1 changed files with 21 additions and 10 deletions
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31
desmume/src/windows/snddx.c
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@ -16,8 +16,10 @@
along with DeSmuME; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <dsound.h>
#ifdef __MINGW32__
// I have to do this because for some reason because the dxerr8.h header is fubared
@ -61,7 +63,8 @@ static u32 soundbufsize;
static LONG soundvolume;
static int issoundmuted;
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
int SNDDXInit(int buffersize)
{
@ -160,7 +163,8 @@ int SNDDXInit(int buffersize)
return 0;
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
void SNDDXDeInit()
{
@ -190,7 +194,8 @@ void SNDDXDeInit()
}
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
void SNDDXUpdateAudio(s16 *buffer, u32 num_samples)
{
@ -216,7 +221,8 @@ void SNDDXUpdateAudio(s16 *buffer, u32 num_samples)
IDirectSoundBuffer8_Unlock(lpDSB2, buffer1, buffer1_size, buffer2, buffer2_size);
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
u32 SNDDXGetAudioSpace()
{
@ -237,7 +243,8 @@ u32 SNDDXGetAudioSpace()
// return 0;
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
void SNDDXMuteAudio()
{
@ -245,7 +252,8 @@ void SNDDXMuteAudio()
IDirectSoundBuffer8_SetVolume (lpDSB2, DSBVOLUME_MIN);
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
void SNDDXUnMuteAudio()
{
@ -253,14 +261,17 @@ void SNDDXUnMuteAudio()
IDirectSoundBuffer8_SetVolume (lpDSB2, soundvolume);
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
void SNDDXSetVolume(int volume)
{
if (!lpDSB2) return ; /* might happen when changing sounddevice on the fly, caused a gpf */
soundvolume = (((LONG)volume) - 100) * 100;
if (!issoundmuted)
IDirectSoundBuffer8_SetVolume (lpDSB2, soundvolume);
}
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////