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Diffstat (limited to '3rdparty/SDL2/src/audio/SDL_mixer.c')
-rw-r--r--3rdparty/SDL2/src/audio/SDL_mixer.c369
1 files changed, 0 insertions, 369 deletions
diff --git a/3rdparty/SDL2/src/audio/SDL_mixer.c b/3rdparty/SDL2/src/audio/SDL_mixer.c
deleted file mode 100644
index e0219392d5b..00000000000
--- a/3rdparty/SDL2/src/audio/SDL_mixer.c
+++ /dev/null
@@ -1,369 +0,0 @@
-/*
- Simple DirectMedia Layer
- Copyright (C) 1997-2016 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"
-
-/* This provides the default mixing callback for the SDL audio routines */
-
-#include "SDL_cpuinfo.h"
-#include "SDL_timer.h"
-#include "SDL_audio.h"
-#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)
- * Changed to use 0xFE instead of 0xFF for better sound quality.
- */
-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, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
- 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE
-};
-
-/* The volume ranges from 0 - 128 */
-#define ADJUST_VOLUME(s, v) (s = (s*v)/SDL_MIX_MAXVOLUME)
-#define ADJUST_VOLUME_U8(s, v) (s = (((s-128)*v)/SDL_MIX_MAXVOLUME)+128)
-
-
-void
-SDL_MixAudioFormat(Uint8 * dst, const Uint8 * src, SDL_AudioFormat format,
- Uint32 len, int volume)
-{
- if (volume == 0) {
- return;
- }
-
- switch (format) {
-
- case AUDIO_U8:
- {
-#if defined(__GNUC__) && defined(__M68000__) && !defined(__mcoldfire__) && defined(SDL_ASSEMBLY_ROUTINES)
- SDL_MixAudio_m68k_U8((char *) dst, (char *) src,
- (unsigned long) len, (long) volume,
- (char *) mix8);
-#else
- Uint8 src_sample;
-
- while (len--) {
- src_sample = *src;
- ADJUST_VOLUME_U8(src_sample, volume);
- *dst = mix8[*dst + src_sample];
- ++dst;
- ++src;
- }
-#endif
- }
- break;
-
- case AUDIO_S8:
- {
- Sint8 *dst8, *src8;
- Sint8 src_sample;
- int dst_sample;
- const int max_audioval = ((1 << (8 - 1)) - 1);
- const int min_audioval = -(1 << (8 - 1));
-
- src8 = (Sint8 *) src;
- dst8 = (Sint8 *) dst;
- while (len--) {
- src_sample = *src8;
- ADJUST_VOLUME(src_sample, volume);
- dst_sample = *dst8 + src_sample;
- if (dst_sample > max_audioval) {
- *dst8 = max_audioval;
- } else if (dst_sample < min_audioval) {
- *dst8 = min_audioval;
- } else {
- *dst8 = dst_sample;
- }
- ++dst8;
- ++src8;
- }
- }
- break;
-
- case AUDIO_S16LSB:
- {
- Sint16 src1, src2;
- int dst_sample;
- const int max_audioval = ((1 << (16 - 1)) - 1);
- const int min_audioval = -(1 << (16 - 1));
-
- len /= 2;
- while (len--) {
- src1 = ((src[1]) << 8 | src[0]);
- ADJUST_VOLUME(src1, volume);
- src2 = ((dst[1]) << 8 | dst[0]);
- 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;
- }
- dst[0] = dst_sample & 0xFF;
- dst_sample >>= 8;
- dst[1] = dst_sample & 0xFF;
- dst += 2;
- }
- }
- break;
-
- case AUDIO_S16MSB:
- {
-#if defined(__GNUC__) && defined(__M68000__) && !defined(__mcoldfire__) && defined(SDL_ASSEMBLY_ROUTINES)
- SDL_MixAudio_m68k_S16MSB((short *) dst, (short *) src,
- (unsigned long) len, (long) volume);
-#else
- Sint16 src1, src2;
- int dst_sample;
- const int max_audioval = ((1 << (16 - 1)) - 1);
- const int min_audioval = -(1 << (16 - 1));
-
- len /= 2;
- while (len--) {
- src1 = ((src[0]) << 8 | src[1]);
- ADJUST_VOLUME(src1, volume);
- src2 = ((dst[0]) << 8 | dst[1]);
- 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;
- }
- dst[1] = dst_sample & 0xFF;
- dst_sample >>= 8;
- dst[0] = dst_sample & 0xFF;
- dst += 2;
- }
-#endif
- }
- break;
-
- case AUDIO_U16LSB:
- {
- Uint16 src1, src2;
- int dst_sample;
- const int max_audioval = 0xFFFF;
-
- len /= 2;
- while (len--) {
- src1 = ((src[1]) << 8 | src[0]);
- ADJUST_VOLUME(src1, volume);
- src2 = ((dst[1]) << 8 | dst[0]);
- src += 2;
- dst_sample = src1 + src2;
- if (dst_sample > max_audioval) {
- dst_sample = max_audioval;
- }
- dst[0] = dst_sample & 0xFF;
- dst_sample >>= 8;
- dst[1] = dst_sample & 0xFF;
- dst += 2;
- }
- }
- break;
-
- case AUDIO_U16MSB:
- {
- Uint16 src1, src2;
- int dst_sample;
- const int max_audioval = 0xFFFF;
-
- len /= 2;
- while (len--) {
- src1 = ((src[0]) << 8 | src[1]);
- ADJUST_VOLUME(src1, volume);
- src2 = ((dst[0]) << 8 | dst[1]);
- src += 2;
- dst_sample = src1 + src2;
- if (dst_sample > max_audioval) {
- dst_sample = max_audioval;
- }
- dst[1] = dst_sample & 0xFF;
- dst_sample >>= 8;
- dst[0] = dst_sample & 0xFF;
- dst += 2;
- }
- }
- break;
-
- case AUDIO_S32LSB:
- {
- const Uint32 *src32 = (Uint32 *) src;
- Uint32 *dst32 = (Uint32 *) dst;
- Sint64 src1, src2;
- Sint64 dst_sample;
- const Sint64 max_audioval = ((((Sint64) 1) << (32 - 1)) - 1);
- const Sint64 min_audioval = -(((Sint64) 1) << (32 - 1));
-
- len /= 4;
- while (len--) {
- src1 = (Sint64) ((Sint32) SDL_SwapLE32(*src32));
- src32++;
- ADJUST_VOLUME(src1, volume);
- src2 = (Sint64) ((Sint32) SDL_SwapLE32(*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_SwapLE32((Uint32) ((Sint32) dst_sample));
- }
- }
- break;
-
- case AUDIO_S32MSB:
- {
- const Uint32 *src32 = (Uint32 *) src;
- Uint32 *dst32 = (Uint32 *) dst;
- Sint64 src1, src2;
- Sint64 dst_sample;
- const Sint64 max_audioval = ((((Sint64) 1) << (32 - 1)) - 1);
- const Sint64 min_audioval = -(((Sint64) 1) << (32 - 1));
-
- len /= 4;
- while (len--) {
- src1 = (Sint64) ((Sint32) SDL_SwapBE32(*src32));
- src32++;
- ADJUST_VOLUME(src1, volume);
- src2 = (Sint64) ((Sint32) SDL_SwapBE32(*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_SwapBE32((Uint32) ((Sint32) dst_sample));
- }
- }
- break;
-
- case AUDIO_F32LSB:
- {
- const float fmaxvolume = 1.0f / ((float) SDL_MIX_MAXVOLUME);
- const float fvolume = (float) volume;
- const float *src32 = (float *) src;
- float *dst32 = (float *) dst;
- float src1, src2;
- double dst_sample;
- /* !!! FIXME: are these right? */
- const double max_audioval = 3.402823466e+38F;
- const double min_audioval = -3.402823466e+38F;
-
- len /= 4;
- while (len--) {
- src1 = ((SDL_SwapFloatLE(*src32) * fvolume) * fmaxvolume);
- src2 = SDL_SwapFloatLE(*dst32);
- src32++;
-
- dst_sample = ((double) src1) + ((double) src2);
- if (dst_sample > max_audioval) {
- dst_sample = max_audioval;
- } else if (dst_sample < min_audioval) {
- dst_sample = min_audioval;
- }
- *(dst32++) = SDL_SwapFloatLE((float) dst_sample);
- }
- }
- break;
-
- case AUDIO_F32MSB:
- {
- const float fmaxvolume = 1.0f / ((float) SDL_MIX_MAXVOLUME);
- const float fvolume = (float) volume;
- const float *src32 = (float *) src;
- float *dst32 = (float *) dst;
- float src1, src2;
- double dst_sample;
- /* !!! FIXME: are these right? */
- const double max_audioval = 3.402823466e+38F;
- const double min_audioval = -3.402823466e+38F;
-
- len /= 4;
- while (len--) {
- src1 = ((SDL_SwapFloatBE(*src32) * fvolume) * fmaxvolume);
- src2 = SDL_SwapFloatBE(*dst32);
- src32++;
-
- dst_sample = ((double) src1) + ((double) src2);
- if (dst_sample > max_audioval) {
- dst_sample = max_audioval;
- } else if (dst_sample < min_audioval) {
- dst_sample = min_audioval;
- }
- *(dst32++) = SDL_SwapFloatBE((float) dst_sample);
- }
- }
- break;
-
- default: /* If this happens... FIXME! */
- SDL_SetError("SDL_MixAudioFormat(): unknown audio format");
- return;
- }
-}
-
-/* vi: set ts=4 sw=4 expandtab: */