view src/video/Xext/Xv/Xvlibint.h @ 1982:3b4ce57c6215

First shot at new audio data types (int32 and float32). Notable changes: - Converters between types are autogenerated. Instead of making multiple passes over the data with seperate filters for endianess, size, signedness, etc, converting between data types is always one specialized filter. This simplifies SDL_BuildAudioCVT(), which otherwise had a million edge cases with the new types, and makes the actually conversions more CPU cache friendly. Left a stub for adding specific optimized versions of these routines (SSE/MMX/Altivec, assembler, etc) - Autogenerated converters are built by SDL/src/audio/sdlgenaudiocvt.pl. This does not need to be run unless tweaking the code, and thus doesn't need integration into the build system. - Went through all the drivers and tried to weed out all the "Uint16" references that are better specified with the new SDL_AudioFormat typedef. - Cleaned out a bunch of hardcoded bitwise magic numbers and replaced them with new SDL_AUDIO_* macros. - Added initial float32 and int32 support code. Theoretically, existing drivers will push these through converters to get the data they want to feed to the hardware. Still TODO: - Optimize and debug new converters. - Update the CoreAudio backend to accept float32 data directly. - Other backends, too? - SDL_LoadWAV() needs to be updated to support int32 and float32 .wav files (both of which exist and can be generated by 'sox' for testing purposes). - Update the mixer to handle new datatypes. - Optionally update SDL_sound and SDL_mixer, etc.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 24 Aug 2006 12:10:46 +0000
parents c121d94672cb
children 81dde1b00bf1
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/***********************************************************
Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
and the Massachusetts Institute of Technology, Cambridge, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
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both that copyright notice and this permission notice appear in 
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software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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******************************************************************/
/* $XFree86: xc/lib/Xv/Xvlibint.h,v 1.5 2001/07/25 15:04:53 dawes Exp $ */

#ifndef XVLIBINT_H
#define XVLIBINT_H
/*
** File: 
**
**   Xvlibint.h --- Xv library internal header file
**
** Author: 
**
**   David Carver (Digital Workstation Engineering/Project Athena)
**
** Revisions:
**
**   01.24.91 Carver
**     - version 1.4 upgrade
**
*/

#define NEED_REPLIES

#include <X11/Xlibint.h>
#include "../extensions/Xvproto.h"
#include "../extensions/Xvlib.h"

#if !defined(UNIXCPP)
#define XvGetReq(name, req) \
        WORD64ALIGN\
	if ((dpy->bufptr + SIZEOF(xv##name##Req)) > dpy->bufmax)\
		_XFlush(dpy);\
	req = (xv##name##Req *)(dpy->last_req = dpy->bufptr);\
	req->reqType = info->codes->major_opcode;\
        req->xvReqType = xv_##name; \
        req->length = (SIZEOF(xv##name##Req))>>2;\
	dpy->bufptr += SIZEOF(xv##name##Req);\
	dpy->request++

#else /* non-ANSI C uses empty comment instead of "##" for token concatenation */
#define XvGetReq(name, req) \
        WORD64ALIGN\
	if ((dpy->bufptr + SIZEOF(xv/**/name/**/Req)) > dpy->bufmax)\
		_XFlush(dpy);\
	req = (xv/**/name/**/Req *)(dpy->last_req = dpy->bufptr);\
	req->reqType = info->codes->major_opcode;\
	req->xvReqType = xv_/**/name;\
	req->length = (SIZEOF(xv/**/name/**/Req))>>2;\
	dpy->bufptr += SIZEOF(xv/**/name/**/Req);\
	dpy->request++
#endif


#endif /* XVLIBINT_H */
/* vi: set ts=4 sw=4 expandtab: */