From 30f41c02aec763d32e62351452da9ef582bc3472 Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Fri, 6 Mar 2026 13:30:59 -0800 Subject: Move contrib libraries to contrib repo --- contrib/SDL-3.2.8/src/audio/SDL_mixer.c | 290 -------------------------------- 1 file changed, 290 deletions(-) delete mode 100644 contrib/SDL-3.2.8/src/audio/SDL_mixer.c (limited to 'contrib/SDL-3.2.8/src/audio/SDL_mixer.c') diff --git a/contrib/SDL-3.2.8/src/audio/SDL_mixer.c b/contrib/SDL-3.2.8/src/audio/SDL_mixer.c deleted file mode 100644 index 047c6fd..0000000 --- a/contrib/SDL-3.2.8/src/audio/SDL_mixer.c +++ /dev/null @@ -1,290 +0,0 @@ -/* - 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" - -// This provides the default mixing callback for the SDL audio routines - -#include "SDL_sysaudio.h" - -/* This table is used to add two sound values together and pin - * the value to avoid overflow. (used with permission from ARDI) - */ -static const Uint8 mix8[] = { - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, - 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, - 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, - 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, - 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, - 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, - 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, - 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, - 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, - 0x5C, 0x5D, 0x5E, 0x5F, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, - 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, - 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, - 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, - 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92, - 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, - 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, - 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, - 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, - 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, - 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, - 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, - 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, - 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, - 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF -}; - -// The volume ranges from 0 - 128 -#define MIX_MAXVOLUME 128 -#define ADJUST_VOLUME(type, s, v) ((s) = (type)(((s) * (v)) / MIX_MAXVOLUME)) -#define ADJUST_VOLUME_U8(s, v) ((s) = (Uint8)(((((s) - 128) * (v)) / MIX_MAXVOLUME) + 128)) - -// !!! FIXME: This needs some SIMD magic. -// !!! FIXME: Add fast-path for volume = 1 -// !!! FIXME: Use larger scales for 16-bit/32-bit integers - -bool SDL_MixAudio(Uint8 *dst, const Uint8 *src, SDL_AudioFormat format, Uint32 len, float fvolume) -{ - int volume = (int)SDL_roundf(fvolume * MIX_MAXVOLUME); - - if (volume == 0) { - return true; - } - - switch (format) { - - case SDL_AUDIO_U8: - { - Uint8 src_sample; - - while (len--) { - src_sample = *src; - ADJUST_VOLUME_U8(src_sample, volume); - *dst = mix8[*dst + src_sample]; - ++dst; - ++src; - } - } break; - - case SDL_AUDIO_S8: - { - Sint8 *dst8, *src8; - Sint8 src_sample; - int dst_sample; - const int max_audioval = SDL_MAX_SINT8; - const int min_audioval = SDL_MIN_SINT8; - - src8 = (Sint8 *)src; - dst8 = (Sint8 *)dst; - while (len--) { - src_sample = *src8; - ADJUST_VOLUME(Sint8, src_sample, volume); - dst_sample = *dst8 + src_sample; - if (dst_sample > max_audioval) { - dst_sample = max_audioval; - } else if (dst_sample < min_audioval) { - dst_sample = min_audioval; - } - *dst8 = (Sint8)dst_sample; - ++dst8; - ++src8; - } - } break; - - case SDL_AUDIO_S16LE: - { - Sint16 src1, src2; - int dst_sample; - const int max_audioval = SDL_MAX_SINT16; - const int min_audioval = SDL_MIN_SINT16; - - len /= 2; - while (len--) { - src1 = SDL_Swap16LE(*(Sint16 *)src); - ADJUST_VOLUME(Sint16, src1, volume); - src2 = SDL_Swap16LE(*(Sint16 *)dst); - src += 2; - dst_sample = src1 + src2; - if (dst_sample > max_audioval) { - dst_sample = max_audioval; - } else if (dst_sample < min_audioval) { - dst_sample = min_audioval; - } - *(Sint16 *)dst = SDL_Swap16LE((Sint16)dst_sample); - dst += 2; - } - } break; - - case SDL_AUDIO_S16BE: - { - Sint16 src1, src2; - int dst_sample; - const int max_audioval = SDL_MAX_SINT16; - const int min_audioval = SDL_MIN_SINT16; - - len /= 2; - while (len--) { - src1 = SDL_Swap16BE(*(Sint16 *)src); - ADJUST_VOLUME(Sint16, src1, volume); - src2 = SDL_Swap16BE(*(Sint16 *)dst); - src += 2; - dst_sample = src1 + src2; - if (dst_sample > max_audioval) { - dst_sample = max_audioval; - } else if (dst_sample < min_audioval) { - dst_sample = min_audioval; - } - *(Sint16 *)dst = SDL_Swap16BE((Sint16)dst_sample); - dst += 2; - } - } break; - - case SDL_AUDIO_S32LE: - { - const Uint32 *src32 = (Uint32 *)src; - Uint32 *dst32 = (Uint32 *)dst; - Sint64 src1, src2; - Sint64 dst_sample; - const Sint64 max_audioval = SDL_MAX_SINT32; - const Sint64 min_audioval = SDL_MIN_SINT32; - - len /= 4; - while (len--) { - src1 = (Sint64)((Sint32)SDL_Swap32LE(*src32)); - src32++; - ADJUST_VOLUME(Sint64, src1, volume); - src2 = (Sint64)((Sint32)SDL_Swap32LE(*dst32)); - dst_sample = src1 + src2; - if (dst_sample > max_audioval) { - dst_sample = max_audioval; - } else if (dst_sample < min_audioval) { - dst_sample = min_audioval; - } - *(dst32++) = SDL_Swap32LE((Uint32)((Sint32)dst_sample)); - } - } break; - - case SDL_AUDIO_S32BE: - { - const Uint32 *src32 = (Uint32 *)src; - Uint32 *dst32 = (Uint32 *)dst; - Sint64 src1, src2; - Sint64 dst_sample; - const Sint64 max_audioval = SDL_MAX_SINT32; - const Sint64 min_audioval = SDL_MIN_SINT32; - - len /= 4; - while (len--) { - src1 = (Sint64)((Sint32)SDL_Swap32BE(*src32)); - src32++; - ADJUST_VOLUME(Sint64, src1, volume); - src2 = (Sint64)((Sint32)SDL_Swap32BE(*dst32)); - dst_sample = src1 + src2; - if (dst_sample > max_audioval) { - dst_sample = max_audioval; - } else if (dst_sample < min_audioval) { - dst_sample = min_audioval; - } - *(dst32++) = SDL_Swap32BE((Uint32)((Sint32)dst_sample)); - } - } break; - - case SDL_AUDIO_F32LE: - { - const float *src32 = (float *)src; - float *dst32 = (float *)dst; - float src1, src2; - float dst_sample; - const float max_audioval = 1.0f; - const float min_audioval = -1.0f; - - len /= 4; - while (len--) { - src1 = SDL_SwapFloatLE(*src32) * fvolume; - src2 = SDL_SwapFloatLE(*dst32); - src32++; - - dst_sample = src1 + src2; - if (dst_sample > max_audioval) { - dst_sample = max_audioval; - } else if (dst_sample < min_audioval) { - dst_sample = min_audioval; - } - *(dst32++) = SDL_SwapFloatLE(dst_sample); - } - } break; - - case SDL_AUDIO_F32BE: - { - const float *src32 = (float *)src; - float *dst32 = (float *)dst; - float src1, src2; - float dst_sample; - const float max_audioval = 1.0f; - const float min_audioval = -1.0f; - - len /= 4; - while (len--) { - src1 = SDL_SwapFloatBE(*src32) * fvolume; - src2 = SDL_SwapFloatBE(*dst32); - src32++; - - dst_sample = src1 + src2; - if (dst_sample > max_audioval) { - dst_sample = max_audioval; - } else if (dst_sample < min_audioval) { - dst_sample = min_audioval; - } - *(dst32++) = SDL_SwapFloatBE(dst_sample); - } - } break; - - default: // If this happens... FIXME! - return SDL_SetError("SDL_MixAudio(): unknown audio format"); - } - - return true; -} -- cgit v1.2.3