Mercurial > sdl-ios-xcode

comparison src/audio/SDL_mixer.c @ 2014:7abe37467fa5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Replaced unions with calls to SDL_SwapFloat...
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 01 Sep 2006 19:29:49 +0000
parents 0615fa58c0be
children 5f6550e5184f
comparison
equal deleted inserted replaced
2013:0615fa58c0be 2014:7abe37467fa5
319 double dst_sample; 319 double dst_sample;
320 /* !!! FIXME: are these right? */ 320 /* !!! FIXME: are these right? */
321 const double max_audioval = 3.40282347e+38F; 321 const double max_audioval = 3.40282347e+38F;
322 const double min_audioval = -3.40282347e+38F; 322 const double min_audioval = -3.40282347e+38F;
323 323
324 /* !!! FIXME: this is a little nasty. */
325 union
326 {
327 float f;
328 Uint32 ui32;
329 } cvt;
330
331 len /= 4; 324 len /= 4;
332 while (len--) { 325 while (len--) {
333 cvt.f = *(src32++); 326 src1 = ((SDL_SwapFloatLE(*src32) * fvolume) * fmaxvolume);
334 cvt.ui32 = SDL_SwapLE32(cvt.ui32); 327 src2 = SDL_SwapFloatLE(*dst32);
335 src1 = ((cvt.f * fvolume) * fmaxvolume); 328 src32++;
336 329
337 cvt.f = *dst32; 330 dst_sample = ((double) src1) + ((double) src2);
338 cvt.ui32 = SDL_SwapLE32(cvt.ui32); 331 if (dst_sample > max_audioval) {
339 src2 = cvt.f; 332 dst_sample = max_audioval;
340 333 } else if (dst_sample < min_audioval) {
341 dst_sample = src1 + src2; 334 dst_sample = min_audioval;
342 if (dst_sample > max_audioval) { 335 }
343 dst_sample = max_audioval; 336 *(dst32++) = SDL_SwapFloatLE((float) dst_sample);
344 } else if (dst_sample < min_audioval) {
345 dst_sample = min_audioval;
346 }
347 cvt.f = ((float) dst_sample);
348 cvt.ui32 = SDL_SwapLE32(cvt.ui32);
349 *(dst32++) = cvt.f;
350 } 337 }
351 } 338 }
352 break; 339 break;
353 340
354 case AUDIO_F32MSB: 341 case AUDIO_F32MSB:
361 double dst_sample; 348 double dst_sample;
362 /* !!! FIXME: are these right? */ 349 /* !!! FIXME: are these right? */
363 const double max_audioval = 3.40282347e+38F; 350 const double max_audioval = 3.40282347e+38F;
364 const double min_audioval = -3.40282347e+38F; 351 const double min_audioval = -3.40282347e+38F;
365 352
366 /* !!! FIXME: this is a little nasty. */
367 union
368 {
369 float f;
370 Uint32 ui32;
371 } cvt;
372
373 len /= 4; 353 len /= 4;
374 while (len--) { 354 while (len--) {
375 cvt.f = *(src32++); 355 src1 = ((SDL_SwapFloatBE(*src32) * fvolume) * fmaxvolume);
376 cvt.ui32 = SDL_SwapBE32(cvt.ui32); 356 src2 = SDL_SwapFloatBE(*dst32);
377 src1 = ((cvt.f * fvolume) * fmaxvolume); 357 src32++;
378 358
379 cvt.f = *dst32; 359 dst_sample = ((double) src1) + ((double) src2);
380 cvt.ui32 = SDL_SwapBE32(cvt.ui32); 360 if (dst_sample > max_audioval) {
381 src2 = cvt.f; 361 dst_sample = max_audioval;
382 362 } else if (dst_sample < min_audioval) {
383 dst_sample = src1 + src2; 363 dst_sample = min_audioval;
384 if (dst_sample > max_audioval) { 364 }
385 dst_sample = max_audioval; 365 *(dst32++) = SDL_SwapFloatBE((float) dst_sample);
386 } else if (dst_sample < min_audioval) {
387 dst_sample = min_audioval;
388 }
389 cvt.f = ((float) dst_sample);
390 cvt.ui32 = SDL_SwapBE32(cvt.ui32);
391 *(dst32++) = cvt.f;
392 } 366 }
393 } 367 }
394 break; 368 break;
395 369
396 default: /* If this happens... FIXME! */ 370 default: /* If this happens... FIXME! */