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Date: Thu, 27 Oct 2005 16:30:08 -0700
From: Bill May <wmay@cisco.com>
To: sdl@libsdl.org
Subject: [SDL] Use of fake_stream in SDL_RunAudio

Hi,

I'm trying to get the playback latency as low as I can for
audio playback.

I'm using Linux, and noticed that there is a delay in SDL_RunAudio while
stream gets set to audio->fake_stream, instead of getting the
buffer.

The below patch seems to work fine in my system (it tries GetAudioBuf
before the main loop); is there any reason this will not work ?

Thanks,
Bill May

Index: src/audio/SDL_audio.c
===================================================================
RCS file: /vws/pan/mpeg4ip/lib/SDLAudio/src/audio/SDL_audio.c,v
retrieving revision 1.6
diff -c -w -r1.6 SDL_audio.c
*** src/audio/SDL_audio.c       13 Jan 2005 18:21:29 -0000      1.6
--- src/audio/SDL_audio.c       27 Oct 2005 22:58:17 -0000
***************
*** 168,173 ****
--- 168,175 ----
                 silence = audio->spec.silence;
                 stream_len = audio->spec.size;
         }
+       stream = audio->GetAudioBuf(audio);
+       if (stream == NULL)
           stream = audio->fake_stream;

   #ifdef ENABLE_AHI