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audio: First shot at the SDL3 audio subsystem redesign!

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This is a work in progress! (and this commit will probably get
force-pushed over at some point).
This commit is contained in:
Ryan C. Gordon 2023-05-12 23:37:02 -04:00
parent b221b59995
commit 905c4fff5b
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GPG key ID: FA148B892AB48044
19 changed files with 1974 additions and 2464 deletions
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55
src/audio/SDL_audio_c.h
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@ -22,59 +22,8 @@
#ifndef SDL_audio_c_h_
#define SDL_audio_c_h_
#include "SDL_internal.h"
/* !!! FIXME: remove this header and have things just include SDL_sysaudio.h directly. */
#define DEBUG_AUDIOSTREAM 0
#define DEBUG_AUDIO_CONVERT 0
#if DEBUG_AUDIO_CONVERT
#define LOG_DEBUG_AUDIO_CONVERT(from, to) SDL_Log("SDL_AUDIO_CONVERT: Converting %s to %s.\n", from, to);
#else
#define LOG_DEBUG_AUDIO_CONVERT(from, to)
#endif
/* Functions and variables exported from SDL_audio.c for SDL_sysaudio.c */
/* Function to get a list of audio formats, ordered most similar to `format` to least, 0-terminated. Don't free results. */
const SDL_AudioFormat *SDL_ClosestAudioFormats(SDL_AudioFormat format);
/* Function to calculate the size and silence for a SDL_AudioSpec */
extern Uint8 SDL_GetSilenceValueForFormat(const SDL_AudioFormat format);
extern void SDL_CalculateAudioSpec(SDL_AudioSpec *spec);
/* Must be called at least once before using converters (SDL_CreateAudioStream will call it). */
extern void SDL_ChooseAudioConverters(void);
/* These pointers get set during SDL_ChooseAudioConverters() to various SIMD implementations. */
extern void (*SDL_Convert_S8_to_F32)(float *dst, const Sint8 *src, int num_samples);
extern void (*SDL_Convert_U8_to_F32)(float *dst, const Uint8 *src, int num_samples);
extern void (*SDL_Convert_S16_to_F32)(float *dst, const Sint16 *src, int num_samples);
extern void (*SDL_Convert_S32_to_F32)(float *dst, const Sint32 *src, int num_samples);
extern void (*SDL_Convert_F32_to_S8)(Sint8 *dst, const float *src, int num_samples);
extern void (*SDL_Convert_F32_to_U8)(Uint8 *dst, const float *src, int num_samples);
extern void (*SDL_Convert_F32_to_S16)(Sint16 *dst, const float *src, int num_samples);
extern void (*SDL_Convert_F32_to_S32)(Sint32 *dst, const float *src, int num_samples);
/**
* Use this function to initialize a particular audio driver.
*
* This function is used internally, and should not be used unless you have a
* specific need to designate the audio driver you want to use. You should
* normally use SDL_Init() or SDL_InitSubSystem().
*
* \param driver_name the name of the desired audio driver
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*/
extern int SDL_InitAudio(const char *driver_name);
/**
* Use this function to shut down audio if you initialized it with SDL_InitAudio().
*
* This function is used internally, and should not be used unless you have a
* specific need to specify the audio driver you want to use. You should
* normally use SDL_Quit() or SDL_QuitSubSystem().
*/
extern void SDL_QuitAudio(void);
#include "SDL_sysaudio.h"
#endif /* SDL_audio_c_h_ */