Mercurial > sdl-ios-xcode
view src/video/photon/SDL_ph_video.h @ 765:4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
nanosleep because nanosleep may not be portable to all systems
using SDL with the ALSA backend. This may be a moot point with
the switch to blocking writes anyway...
Date: Sat, 27 Dec 2003 21:47:36 +0100
From: Michel Daenzer
To: Debian Bug Tracking System
Subject: [SDL] Bug#225252: [PATCH] ALSA fixes
Package: libsdl1.2debian-all
Version: 1.2.6-2
Severity: normal
Tags: patch
For SDL 1.2.6, the ALSA backend was changed to call snd_pcm_open() with
SND_PCM_NONBLOCK. That's a good idea per se, however, it causes high CPU
usage, interrupted sound and stuttering in some games here. Taking a nanosleep
whenever snd_pcm_writei() returns -EAGAIN fixes this, but I think it's more
efficient to use blocking mode for the actual sound playback. Feedback from the
SDL and ALSA lists appreciated.
The patch also fixes the default ALSA device to be used.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 04 Jan 2004 15:40:50 +0000 |
parents | b14fdadd8311 |
children | b8d311d90021 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 */ #ifndef __SDL_PH_VIDEO_H__ #define __SDL_PH_VIDEO_H__ #include "SDL_mouse.h" #include "SDL_sysvideo.h" #include <Ph.h> #include <Pt.h> #include <photon/Pg.h> #include <photon/PdDirect.h> #ifdef HAVE_OPENGL #include <photon/PdGL.h> #endif /* HAVE_OPENGL */ /* Hidden "this" pointer for the video functions */ #define _THIS SDL_VideoDevice* this #define PH_OGL_MAX_ATTRIBS 32 #define SDLPH_PAL_NONE 0x00000000L #define SDLPH_PAL_EMULATE 0x00000001L #define SDLPH_PAL_SYSTEM 0x00000002L typedef struct { unsigned char* Y; unsigned char* V; unsigned char* U; } FRAMEDATA; /* Mask values for SDL_ReallocFormat() */ struct ColourMasks { Uint32 red; Uint32 green; Uint32 blue; Uint32 alpha; Uint32 bpp; }; /* Private display data */ struct SDL_PrivateVideoData { PgDisplaySettings_t mode_settings; PtWidget_t *Window; /* used to handle input events */ PhImage_t *image; /* used to display image */ #ifdef HAVE_OPENGL PdOpenGLContext_t* OGLContext; /* OpenGL context */ Uint32 OGLFlags; /* OpenGL flags */ Uint32 OGLBPP; /* OpenGL bpp */ #endif /* HAVE_OPENGL */ PgColor_t savedpal[_Pg_MAX_PALETTE]; PgColor_t syspalph[_Pg_MAX_PALETTE]; struct { PdDirectContext_t* direct_context; PdOffscreenContext_t* offscreen_context; PdOffscreenContext_t* offscreen_backcontext; PhDrawContext_t* oldDC; uint8_t* dc_ptr; unsigned char* CurrentFrameData; unsigned char* FrameData0; unsigned char* FrameData1; Uint32 current; Uint32 flags; } ocimage; PgHWCaps_t graphics_card_caps; /* Graphics card caps at the moment of start */ PgVideoModeInfo_t desktop_mode; /* Current desktop video mode information */ int old_video_mode; /* Stored mode before fullscreen switch */ int old_refresh_rate; /* Stored refresh rate befor fullscreen switch */ int mouse_relative; WMcursor* BlankCursor; Uint32 depth; /* current visual depth (not bpp) */ Uint32 desktopbpp; /* bpp of desktop at the moment of start */ Uint32 desktoppal; /* palette mode emulation or system */ int currently_fullscreen; int currently_hided; /* 1 - window hided (minimazed), 0 - normal */ int currently_maximized; /* 1 - window hided (minimazed), 0 - normal */ PhEvent_t* event; SDL_Overlay* overlay; }; #define mode_settings (this->hidden->mode_settings) #define window (this->hidden->Window) #define SDL_Image (this->hidden->image) #define OCImage (this->hidden->ocimage) #define old_video_mode (this->hidden->old_video_mode) #define old_refresh_rate (this->hidden->old_refresh_rate) #define graphics_card_caps (this->hidden->graphics_card_caps) #define desktopbpp (this->hidden->desktopbpp) #define desktoppal (this->hidden->desktoppal) #define savedpal (this->hidden->savedpal) #define syspalph (this->hidden->syspalph) #define currently_fullscreen (this->hidden->currently_fullscreen) #define currently_hided (this->hidden->currently_hided) #define currently_maximized (this->hidden->currently_maximized) #define event (this->hidden->event) #define current_overlay (this->hidden->overlay) #define desktop_mode (this->hidden->desktop_mode) #define mouse_relative (this->hidden->mouse_relative) #define SDL_BlankCursor (this->hidden->BlankCursor) #ifdef HAVE_OPENGL #define oglctx (this->hidden->OGLContext) #define oglflags (this->hidden->OGLFlags) #define oglbpp (this->hidden->OGLBPP) #endif /* HAVE_OPENGL */ #endif /* __SDL_PH_VIDEO_H__ */