change build system to CMake and use SDL3 for everything

2025-02-24 19:47:40 +01:00
parent e6a5a00dcb
commit 74e0d78a4c
2052 changed files with 981424 additions and 1461 deletions
@@ -0,0 +1,43 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  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_