view src/video/os2fslib/SDL_os2fslib.h @ 4216:5b99971a27b4 SDL-1.2

Fixed bug #698 Hans de Goede 2009-02-13 01:10:52 PST Since the new "glitch free" version of pulseaudio (used in Fedora 10 amongst others), the sound of SDL using apps (like a simple playmus call) has been crackling. While looking in to fixing this I noticed that the current pulseaudio code in SDL uses pa_simple. However pa_simple uses a thread to pump pulseaudio events and ipc, given that SDL already has its own thread for audio handling this is clearly suboptimal, leading to unnecessary context switching IPC, etc. Also pa_simple does not allow one to implement the WaitAudio() callback for SDL audiodrivers properly. Given that my work is mostly a rewrite (although some original pieces remain) I'm attaching the new .c and .h file, as that is easier to review then the huge diff. Let me know if you also want the diff. This new version has the following features: -no longer use an additional thread next to the SDL sound thread -do not crackle with glitch free audio -when used with a newer pulse, which does glitch free audio, the total latency is the same as with the alsa driver -proper WaitAudio() implementation, saving another mixlen worth of latency -adds a WaitDone() implementation This patch has been written in consultancy with Lennart Poetering (the pulseaudio author) and has been reviewed by him for correct use of the pa API.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 09:27:08 +0000
parents a1b03ba2fcd0
children
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#ifndef _SDL_os2fslib_h
#define _SDL_os2fslib_h


// OS2 specific includes
#define INCL_TYPES
#define INCL_DOS
#define INCL_DOSERRORS
#define INCL_DOSPROCESS
#define INCL_WIN
#define INCL_GPI
#include <os2.h>

#include <FSLib.h>

/* Hidden "this" pointer for the video functions */
#define _THIS	SDL_VideoDevice *_this

/* Private display data */
struct SDL_PrivateVideoData
{
  FSLib_VideoMode_p   pAvailableFSLibVideoModes;
  SDL_Rect          **pListModesResult; // Allocated memory to return list of modes for os2fslib_ListModes() API

  FSLib_VideoMode     SrcBufferDesc;    // Description of current source image buffer
  char               *pchSrcBuffer;     // The source image buffer itself
  SDL_Surface        *pSDLSurface;      // The SDL surface describing the buffer
  HMTX                hmtxUseSrcBuffer; // Mutex semaphore to manipulate src buffer
  HWND                hwndFrame, hwndClient;  // Window handle of frame and client
  int                 iPMThreadStatus;  // 0: Not running
                                        // 1: Running
                                        // Other: Not running, had an error
  int                 tidPMThread;      // Thread ID of PM Thread
  int                 fInFocus;         // True if we're in focus!
  int                 iSkipWMMOUSEMOVE; // Number of WM_MOUSEMOVE messages to skip!
  int                 iMouseVisible;    //

  PFNWP               pfnOldFrameProc;  // Old window frame procedure
  int                 bProportionalResize; // 0: No proportional resizing
                                           // 1: Do proportional resizing
  ULONG               ulResizingFlag;   // First resizing flag value
};

/* OS/2 specific backdoor function to be able to set FrameControlFlags of */
/* the SDL window before creating it. */
extern DECLSPEC void SDLCALL SDL_OS2FSLIB_SetFCFToUse(ULONG ulFCF);

#endif /* _SDL_os2fslib_h */