From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Sat, 27 Dec 2025 12:03:39 -0800 Subject: Initial commit --- contrib/SDL-3.2.8/src/audio/SDL_audioresample.h | 43 +++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 contrib/SDL-3.2.8/src/audio/SDL_audioresample.h (limited to 'contrib/SDL-3.2.8/src/audio/SDL_audioresample.h') diff --git a/contrib/SDL-3.2.8/src/audio/SDL_audioresample.h b/contrib/SDL-3.2.8/src/audio/SDL_audioresample.h new file mode 100644 index 0000000..6620073 --- /dev/null +++ b/contrib/SDL-3.2.8/src/audio/SDL_audioresample.h @@ -0,0 +1,43 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2025 Sam Lantinga + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "SDL_internal.h" + +#ifndef SDL_audioresample_h_ +#define SDL_audioresample_h_ + +// Internal functions used by SDL_AudioStream for resampling audio. +// The resampler uses 32:32 fixed-point arithmetic to track its position. + +Sint64 SDL_GetResampleRate(int src_rate, int dst_rate); + +int SDL_GetResamplerHistoryFrames(void); +int SDL_GetResamplerPaddingFrames(Sint64 resample_rate); + +Sint64 SDL_GetResamplerInputFrames(Sint64 output_frames, Sint64 resample_rate, Sint64 resample_offset); +Sint64 SDL_GetResamplerOutputFrames(Sint64 input_frames, Sint64 resample_rate, Sint64 *inout_resample_offset); + +// Resample some audio. +// REQUIRES: `inframes >= SDL_GetResamplerInputFrames(outframes)` +// REQUIRES: At least `SDL_GetResamplerPaddingFrames(...)` extra frames to the left of src, and right of src+inframes +void SDL_ResampleAudio(int chans, const float *src, int inframes, float *dst, int outframes, + Sint64 resample_rate, Sint64 *inout_resample_offset); + +#endif // SDL_audioresample_h_ -- cgit v1.2.3