[Fuse-for-macosx-commits] SF.net SVN: fuse-for-macosx: [268] branches/fusegl/fuse/sound/ coreaudiosound.c

[<fr...@us...>]

Revision: 268
          http://svn.sourceforge.net/fuse-for-macosx/?rev=268&view=rev
Author:   fredm
Date:     2006-12-27 04:55:52 -0800 (Wed, 27 Dec 2006)

Log Message:
-----------
Wait to start rendering sound until we have accumulated some data in the sound
fifo.

Modified Paths:
--------------
    branches/fusegl/fuse/sound/coreaudiosound.c

Modified: branches/fusegl/fuse/sound/coreaudiosound.c
===================================================================
--- branches/fusegl/fuse/sound/coreaudiosound.c	2006-12-27 12:14:20 UTC (rev 267)
+++ branches/fusegl/fuse/sound/coreaudiosound.c	2006-12-27 12:55:52 UTC (rev 268)
@@ -54,6 +54,9 @@
  */
 static AudioUnit gOutputUnit;
 
+/* Records sound writer status information */
+static int audio_output_started;
+
 int
 sound_lowlevel_init( const char *dev, int *freqptr, int *stereoptr )
 {
@@ -176,14 +179,8 @@
     return 1;
   }
 
-  /* Start the rendering
-     The DefaultOutputUnit will do any format conversions to the format of the
-     default device */
-  err = AudioOutputUnitStart( gOutputUnit );
-  if( err ) {
-    ui_error( UI_ERROR_ERROR, "AudioOutputUnitStart=%ld", err );
-    return 1;
-  }
+  /* wait to run sound until we have some sound to play */
+  audio_output_started = 0;
 
   return 0;
 }
@@ -193,7 +190,8 @@
 {
   OSStatus err;
 
-  verify_noerr( AudioOutputUnitStop( gOutputUnit ) );
+  if( audio_output_started )
+    verify_noerr( AudioOutputUnitStop( gOutputUnit ) );
 
   err = AudioUnitUninitialize( gOutputUnit );
   if( err ) {
@@ -229,6 +227,19 @@
     ui_error( UI_ERROR_ERROR, "Couldn't write sound fifo: %s",
               strerror( i ) );
   }
+
+  if( !audio_output_started ) {
+    /* Start the rendering
+       The DefaultOutputUnit will do any format conversions to the format of the
+       default device */
+    OSStatus err = AudioOutputUnitStart( gOutputUnit );
+    if( err ) {
+      ui_error( UI_ERROR_ERROR, "AudioOutputUnitStart=%ld", err );
+      return;
+    }
+
+    audio_output_started = 1;
+  }
 }
 
 /* This is the audio processing callback. */


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