[SDL] SDL 1.3 audio API proposal...

[Torsten Giebl]

Hello !


> The API changes are in Subversion for 1.3, but the actual
> implementations are not, yet.
>
>
> The basic gist:
>
>
> - Macros to extract information from AUDIO_* values:
>
>
> printf("AUDIO_S16LSB is %d bits per sample.\n", (int)
> SDL_AUDIO_BITSIZE(AUDIO_S16LSB));
>
>
> if (SDL_AUDIO_ISSIGNED(AUDIO_S16LSB)) printf("AUDIO_S16LSB is a signed
> data type.\n"); if (SDL_AUDIO_ISBIGENDIAN(AUDIO_S16MSB))
> printf("AUDIO_S16LSB is bigendian.\n");
>
>
> - New data types: 32-bit int and floating point samples (AUDIO_S32LSB,
> AUDIO_F32LSB, etc). This will allow better range, and a fast path for
> Mac OS X's CoreAudio. 32-bit types are always signed, but can be in
> either byte order.
>
> - Multiple audio devices. If a given API exposes multiple devices--for
> example, DirectSound can see a Sound Blaster Live, the motherboard's ac97
> chip, and a USB headset--then all three will be available for seperate
> control by the application. Opening a specific device with the new APIs
> will give you an SDL_AudioDeviceID handle. The old APIs will continue to
> exist (and treat the unnamed device as ID #1), which allows backwards
> compatibility for those that don't care about multiple devices. APIs to
> match the old functionality but accept a device ID are being added, as
> well as functionality to enumerate available devices.
>
> - Audio disconnect notifications. The app can be notified if a
> USB/firewire device has been unplugged, or an esound server has dropped
> the connection, etc.
>
> - SDL_MixAudioFormat(): mix a sound buffer in an arbitrary format,
> instead of whatever format the audio device is opened to use. Doesn't
> require an open audio device at all.

I would like to have two of them. A high speed, low quality one and a low
speed, high quality one.

> - Capture support: the multiple device support also allows for devices
> to be opened for capture (recording). These function as separate logical
> devices, even if it's all on the same sound card.


100 %


CU