Mercurial > sdl-ios-xcode
view README.AmigaOS @ 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 | 75a95f82bc1f |
| children | 6d2e1961661a |
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This is the porting of 1.2.0 version of SDL (the latest stable one) to AmigaOS/68k. All the bugs known of the past version have been corrected. And I've added all the new SDL features. This version of SDL needs Cybergraphx V3 (r69+) or CyberGraphX V4 and AHI v3+. Probably it works also with P96 or CGXAga, but it's untested. This version is available as linked library for SAS/C and GCC, only 68k this time, a powerup (ppcemu compatible) and a morphos version will be ready quite soon (i hope). Implemented: - 8/16/24/32bit video modes, both fullscreen and windowed. - Hardware surfaces. - CGX blitting acceleration. - CGX colorkey blitting acceleration. - AHI audio (8/16 bit, with any audio format), always uses unit 0 for now. - Thread support (maybe not 100% compatible with other implementations) - Semaphores - Window resizing and backdrop windows (NEW) - Joystick/Joypad support. To do: - CDRom audio playing support - OpenGL (A guy was working on it but I've lost his tracks :( ) The SAS/C library is distributed with debug info attached, to strip debug info simply add STRIPDEBUG argument to the linker. NOTE: SDL includes debug output using kprintf, to disable it add to your project a function like this: void kprintf(char *a,...) { } Otherwise you can redirect the debug to a console window with sushi, sashimi or similar tools (the default output is the internal serial port). For info, support, bugfix and other feel free to mail me: Gabriele Greco (gabriele.greco@aruba.it) You can find also a small SDL Amiga page at: http://ggreco.interfree.it/sdl.html