Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_AudioCVT.3 @ 1135:cf6133247d34
Mac Classic and CodeWarrior patches.
--ryan.
From: =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb@algonet.se>
Subject: Re: [SDL] Updated Mac patch
Date: Tue, 6 Sep 2005 15:21:27 +0200
To: A list for developers using the SDL library <sdl@libsdl.org>
Earlier, I wrote:
> Updated the previous Mac patch to disable Carbon by default.
> Also "fixed" the SDL.spec again, so that it builds on Darwin.
>
> http://www.algonet.se/~afb/SDL-1.2.9-mac.patch
> Also applied fine to SDL12 CVS, when I tried it.
>
> Haven't completed any new packaging or projects for Xcode/PB,
> but it seems to build and install fine here (in development).
Tested the new patch to build with old CodeWarrior and MPW,
and it seems it needed some hacks with those old headers...
Just in case you want to support the archeological versions -
here is a small add-on to the above patch, to fix those...
http://www.algonet.se/~afb/SDL-1.2.9-classic.patch
I couldn't get the old CW5 projects to build without a few
modifications - such as deleting the stray old header in:
"CWprojects/Support/Carbon/Include/ConditionalMacros.h" ?
But I updated both projects to CW6 too and built for Carbon,
and it ran all of the Mac test projects without any problems.
The MPW file seems to have compiled, with a small order change.
As long as you're still shipping the CWProjects and MPWmake
with the download, they should probably be updated/fixed ?
(another "solution" would of course be to just delete them)
I'll post my new projects along with the new Xcode projects
later on, along with XML exports of the various .mcp files.
(CW5 builds for Classic / "PPC", and CW6 builds for Carbon)
It'll be packaged as a part of the next SpriteWorld X release...
http://spriteworldx.sourceforge.net/ [Classic/Carbon/Win/X11]
--anders
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 08 Sep 2005 06:34:28 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
| rev | line source |
|---|---|
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
1 .TH "SDL_AudioCVT" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_AudioCVT\- Audio Conversion Structure | |
| 4 .SH "STRUCTURE DEFINITION" | |
| 5 .PP | |
| 6 .nf | |
| 7 \f(CWtypedef struct{ | |
| 8 int needed; | |
| 9 Uint16 src_format; | |
| 10 Uint16 dest_format; | |
| 11 double rate_incr; | |
| 12 Uint8 *buf; | |
| 13 int len; | |
| 14 int len_cvt; | |
| 15 int len_mult; | |
| 16 double len_ratio; | |
| 17 void (*filters[10])(struct SDL_AudioCVT *cvt, Uint16 format); | |
| 18 int filter_index; | |
| 19 } SDL_AudioCVT;\fR | |
| 20 .fi | |
| 21 .PP | |
| 22 .SH "STRUCTURE DATA" | |
| 23 .TP 20 | |
| 24 \fBneeded\fR | |
| 25 Set to one if the conversion is possible | |
| 26 .TP 20 | |
| 27 \fBsrc_format\fR | |
| 28 Audio format of the source | |
| 29 .TP 20 | |
| 30 \fBdest_format\fR | |
| 31 Audio format of the destination | |
| 32 .TP 20 | |
| 33 \fBrate_incr\fR | |
| 34 Rate conversion increment | |
| 35 .TP 20 | |
| 36 \fBbuf\fR | |
| 37 Audio buffer | |
| 38 .TP 20 | |
| 39 \fBlen\fR | |
| 40 Length of the original audio buffer in bytes | |
| 41 .TP 20 | |
| 42 \fBlen_cvt\fR | |
| 43 Length of converted audio buffer in bytes (calculated) | |
| 44 .TP 20 | |
| 45 \fBlen_mult\fR | |
| 46 \fBbuf\fR must be \fBlen\fR*\fBlen_mult\fR bytes in size(calculated) | |
| 47 .TP 20 | |
| 48 \fBlen_ratio\fR | |
| 49 Final audio size is \fBlen\fR*\fBlen_ratio\fR | |
| 50 .TP 20 | |
| 51 \fBfilters[10](\&.\&.)\fR | |
| 52 Pointers to functions needed for this conversion | |
| 53 .TP 20 | |
| 54 \fBfilter_index\fR | |
| 55 Current conversion function | |
| 56 .SH "DESCRIPTION" | |
| 57 .PP | |
| 58 The \fBSDL_AudioCVT\fR is used to convert audio data between different formats\&. A \fBSDL_AudioCVT\fR structure is created with the \fI\fBSDL_BuildAudioCVT\fP\fR function, while the actual conversion is done by the \fI\fBSDL_ConvertAudio\fP\fR function\&. | |
| 59 .PP | |
| 60 Many of the fields in the \fBSDL_AudioCVT\fR structure should be considered private and their function will not be discussed here\&. | |
| 61 .IP "\fBUint8 *\fP\fBbuf\fR" 10This points to the audio data that will be used in the conversion\&. It is both the source and the destination, which means the converted audio data overwrites the original data\&. It also means that the converted data may be larger than the original data (if you were converting from 8-bit to 16-bit, for instance), so you must ensure \fBbuf\fR is large enough\&. See below\&. | |
| 62 .IP "\fBint\fP \fBlen\fR" 10This is the length of the original audio data in bytes\&. | |
| 63 .IP "\fBint\fP \fBlen_mult\fR" 10As explained above, the audio buffer needs to be big enough to store the converted data, which may be bigger than the original audio data\&. The length of \fBbuf\fR should be \fBlen\fR*\fBlen_mult\fR\&. | |
| 64 .IP "\fBdouble\fP \fBlen_ratio\fR" 10When you have finished converting your audio data, you need to know how much of your audio buffer is valid\&. \fBlen\fR*\fBlen_ratio\fR is the size of the converted audio data in bytes\&. This is very similar to \fBlen_mult\fR, however when the convert audio data is shorter than the original \fBlen_mult\fR would be 1\&. \fBlen_ratio\fR, on the other hand, would be a fractional number between 0 and 1\&. | |
| 65 .SH "SEE ALSO" | |
| 66 .PP | |
| 67 \fI\fBSDL_BuildAudioCVT\fP\fR, \fI\fBSDL_ConvertAudio\fP\fR, \fI\fBSDL_AudioSpec\fR\fR | |
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
68 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58 |