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jack2/linux/alsa/memops.c

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  1. /*

  2.     Copyright (C) 2000 Paul Davis 

  3. 

  4.     This program is free software; you can redistribute it and/or modify

  5.     it under the terms of the GNU General Public License as published by

  6.     the Free Software Foundation; either version 2 of the License, or

  7.     (at your option) any later version.

  8. 

  9.     This program is distributed in the hope that it will be useful,

  10.     but WITHOUT ANY WARRANTY; without even the implied warranty of

  11.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  12.     GNU General Public License for more details.

  13. 

  14.     You should have received a copy of the GNU General Public License

  15.     along with this program; if not, write to the Free Software

  16.     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

  17. 

  18.     $Id: memops.c,v 1.2 2005/08/29 10:36:28 letz Exp $

  19. */

  20. 

  21. #if defined(HAVE_CONFIG_H)

  22. #include "config.h"

  23. #endif

  24. 

  25. #define _ISOC9X_SOURCE  1

  26. #define _ISOC99_SOURCE  1

  27. 

  28. #define __USE_ISOC9X    1

  29. #define __USE_ISOC99    1

  30. 

  31. #include <stdio.h>

  32. #include <string.h>

  33. #include <math.h>

  34. #include <memory.h>

  35. #include <stdlib.h>

  36. #include <limits.h>

  37. #include <endian.h>

  38. #include "memops.h"

  39. 

  40. 

  41. #define SAMPLE_MAX_24BIT  8388608.0f

  42. #define SAMPLE_MAX_16BIT  32768.0f

  43. 

  44. #define f_round(f) lrintf(f)

  45. 

  46. /* Linear Congruential noise generator. From the music-dsp list

  47.  * less random than rand(), but good enough and 10x faster */

  48. inline unsigned int fast_rand();

  49. 

  50. inline unsigned int fast_rand() {

  51. 	static unsigned int seed = 22222;

  52. 	seed = (seed * 96314165) + 907633515;

  53. 

  54. 	return seed;

  55. }

  56. 

  57. 

  58. /* functions for native float sample data */

  59. 

  60. 

  61. void sample_move_floatLE_sSs (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) {

  62.        while (nsamples--) {

  63.                *dst = *((float *) src);

  64.                dst++;

  65.                src += src_skip;

  66.        }

  67. }

  68. 

  69. void sample_move_dS_floatLE (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state) {

  70.        while (nsamples--) {

  71.                *((float *) dst) = *src;

  72.                dst += dst_skip;

  73.                src++;

  74.        }

  75. }

  76. 

  77. 

  78. /* functions for native integer sample data */

  79. 

  80. 

  81. void sample_move_d32u24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  82. 

  83. {

  84.         long long y;

  85. 	int z;

  86. 

  87. 	while (nsamples--) {

  88. 		y = (long long)(*src * SAMPLE_MAX_24BIT) << 8;

  89. 		if (y > INT_MAX) {

  90. 			z = INT_MAX;

  91. 		} else if (y < INT_MIN) {

  92. 			z = INT_MIN;

  93. 		} else {

  94. 			z = (int)y;

  95. 		}

  96. #if __BYTE_ORDER == __LITTLE_ENDIAN

  97. 		dst[0]=(char)(z>>24);

  98. 		dst[1]=(char)(z>>16);

  99. 		dst[2]=(char)(z>>8);

  100. 		dst[3]=(char)(z);

  101. #elif __BYTE_ORDER == __BIG_ENDIAN

  102. 		dst[0]=(char)(z);

  103. 		dst[1]=(char)(z>>8);

  104. 		dst[2]=(char)(z>>16);

  105. 		dst[3]=(char)(z>>24);

  106. #endif

  107. 		dst += dst_skip;

  108. 		src++;

  109. 	}

  110. }	

  111. 

  112. void sample_move_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  113. 

  114. {

  115.         long long y;

  116. 

  117. 	while (nsamples--) {

  118. 		y = (long long)(*src * SAMPLE_MAX_24BIT) << 8;

  119. 		if (y > INT_MAX) {

  120. 			*((int *) dst) = INT_MAX;

  121. 		} else if (y < INT_MIN) {

  122. 			*((int *) dst) = INT_MIN;

  123. 		} else {

  124. 			*((int *) dst) = (int)y;

  125. 		}

  126. 		dst += dst_skip;

  127. 		src++;

  128. 	}

  129. }	

  130. 

  131. void sample_move_dS_s32u24s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)

  132. {

  133. 	/* ALERT: signed sign-extension portability !!! */

  134. 

  135. 	while (nsamples--) {

  136. 		int x;

  137. #if __BYTE_ORDER == __LITTLE_ENDIAN

  138. 		x = (unsigned char)(src[0]);

  139. 		x <<= 8;

  140. 		x |= (unsigned char)(src[1]);

  141. 		x <<= 8;

  142. 		x |= (unsigned char)(src[2]);

  143. 		x <<= 8;

  144. 		x |= (unsigned char)(src[3]);

  145. #elif __BYTE_ORDER == __BIG_ENDIAN

  146. 		x = (unsigned char)(src[3]);

  147. 		x <<= 8;

  148. 		x |= (unsigned char)(src[2]);

  149. 		x <<= 8;

  150. 		x |= (unsigned char)(src[1]);

  151. 		x <<= 8;

  152. 		x |= (unsigned char)(src[0]);

  153. #endif

  154. 		*dst = (x >> 8) / SAMPLE_MAX_24BIT;

  155. 		dst++;

  156. 		src += src_skip;

  157. 	}

  158. }	

  159. 

  160. void sample_move_dS_s32u24 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)

  161. {

  162. 	/* ALERT: signed sign-extension portability !!! */

  163. 

  164. 	while (nsamples--) {

  165. 		*dst = (*((int *) src) >> 8) / SAMPLE_MAX_24BIT;

  166. 		dst++;

  167. 		src += src_skip;

  168. 	}

  169. }	

  170. 

  171. void sample_move_dither_rect_d32u24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  172. 

  173. {

  174. 	/* ALERT: signed sign-extension portability !!! */

  175. 	jack_default_audio_sample_t  x;

  176. 	long long y;

  177. 	int z;

  178. 

  179. 	while (nsamples--) {

  180. 		x = *src * SAMPLE_MAX_16BIT;

  181. 		x -= (float)fast_rand() / (float)INT_MAX;

  182. 		y = (long long)f_round(x);

  183. 		y <<= 16;

  184. 		if (y > INT_MAX) {

  185. 			z = INT_MAX;

  186. 		} else if (y < INT_MIN) {

  187. 			z = INT_MIN;

  188. 		} else {

  189. 			z = (int)y;

  190. 		}

  191. #if __BYTE_ORDER == __LITTLE_ENDIAN

  192. 		dst[0]=(char)(z>>24);

  193. 		dst[1]=(char)(z>>16);

  194. 		dst[2]=(char)(z>>8);

  195. 		dst[3]=(char)(z);

  196. #elif __BYTE_ORDER == __BIG_ENDIAN

  197. 		dst[0]=(char)(z);

  198. 		dst[1]=(char)(z>>8);

  199. 		dst[2]=(char)(z>>16);

  200. 		dst[3]=(char)(z>>24);

  201. #endif

  202. 		dst += dst_skip;

  203. 		src++;

  204. 	}

  205. }	

  206. 

  207. void sample_move_dither_rect_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  208. 

  209. {

  210. 	/* ALERT: signed sign-extension portability !!! */

  211. 	jack_default_audio_sample_t  x;

  212. 	long long y;

  213. 

  214. 	while (nsamples--) {

  215. 		x = *src * SAMPLE_MAX_16BIT;

  216. 		x -= (float)fast_rand() / (float)INT_MAX;

  217. 		y = (long long)f_round(x);

  218. 		y <<= 16;

  219. 		if (y > INT_MAX) {

  220. 			*((int *) dst) = INT_MAX;

  221. 		} else if (y < INT_MIN) {

  222. 			*((int *) dst) = INT_MIN;

  223. 		} else {

  224. 			*((int *) dst) = (int)y;

  225. 		}

  226. 		dst += dst_skip;

  227. 		src++;

  228. 	}

  229. }	

  230. 

  231. void sample_move_dither_tri_d32u24_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  232. 	

  233. {

  234. 	jack_default_audio_sample_t  x;

  235. 	float     r;

  236. 	float     rm1 = state->rm1;

  237. 	long long y;

  238. 	int z;

  239. 

  240. 	while (nsamples--) {

  241. 		x = *src * (float)SAMPLE_MAX_16BIT;

  242. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  243. 		x += r - rm1;

  244. 		rm1 = r;

  245. 		y = (long long)f_round(x);

  246. 		y <<= 16;

  247. 

  248. 		if (y > INT_MAX) {

  249. 			z = INT_MAX;

  250. 		} else if (y < INT_MIN) {

  251. 			z = INT_MIN;

  252. 		} else {

  253. 			z = (int)y;

  254. 		}

  255. #if __BYTE_ORDER == __LITTLE_ENDIAN

  256. 		dst[0]=(char)(z>>24);

  257. 		dst[1]=(char)(z>>16);

  258. 		dst[2]=(char)(z>>8);

  259. 		dst[3]=(char)(z);

  260. #elif __BYTE_ORDER == __BIG_ENDIAN

  261. 		dst[0]=(char)(z);

  262. 		dst[1]=(char)(z>>8);

  263. 		dst[2]=(char)(z>>16);

  264. 		dst[3]=(char)(z>>24);

  265. #endif

  266. 		dst += dst_skip;

  267. 		src++;

  268. 	}

  269. 	state->rm1 = rm1;

  270. }

  271. 

  272. void sample_move_dither_tri_d32u24_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  273. 	

  274. {

  275. 	jack_default_audio_sample_t  x;

  276. 	float     r;

  277. 	float     rm1 = state->rm1;

  278. 	long long y;

  279. 

  280. 	while (nsamples--) {

  281. 		x = *src * (float)SAMPLE_MAX_16BIT;

  282. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  283. 		x += r - rm1;

  284. 		rm1 = r;

  285. 		y = (long long)f_round(x);

  286. 		y <<= 16;

  287. 

  288. 		if (y > INT_MAX) {

  289. 			*((int *) dst) = INT_MAX;

  290. 		} else if (y < INT_MIN) {

  291. 			*((int *) dst) = INT_MIN;

  292. 		} else {

  293. 			*((int *) dst) = (int)y;

  294. 		}

  295. 

  296. 		dst += dst_skip;

  297. 		src++;

  298. 	}

  299. 	state->rm1 = rm1;

  300. }

  301. 

  302. void sample_move_dither_shaped_d32u24_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  303. 	

  304. {

  305. 	jack_default_audio_sample_t     x;

  306. 	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */

  307. 	jack_default_audio_sample_t     xp; /* x' */

  308. 	float        r;

  309. 	float        rm1 = state->rm1;

  310. 	unsigned int idx = state->idx;

  311. 	long long    y;

  312. 	int z;

  313. 

  314. 	while (nsamples--) {

  315. 		x = *src * (float)SAMPLE_MAX_16BIT;

  316. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  317. 		/* Filter the error with Lipshitz's minimally audible FIR:

  318. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  319. 		xe = x

  320. 		     - state->e[idx] * 2.033f

  321. 		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f

  322. 		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f

  323. 		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f

  324. 		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;

  325. 		xp = xe + r - rm1;

  326. 		rm1 = r;

  327. 

  328. 		/* This could be some inline asm on x86 */

  329. 		y = (long long)f_round(xp);

  330. 

  331. 		/* Intrinsic z^-1 delay */

  332. 		idx = (idx + 1) & DITHER_BUF_MASK;

  333. 		state->e[idx] = y - xe;

  334. 

  335. 		y <<= 16;

  336. 

  337. 		if (y > INT_MAX) {

  338. 			z = INT_MAX;

  339. 		} else if (y < INT_MIN) {

  340. 			z = INT_MIN;

  341. 		} else {

  342. 			z = (int)y;

  343. 		}

  344. #if __BYTE_ORDER == __LITTLE_ENDIAN

  345. 		dst[0]=(char)(z>>24);

  346. 		dst[1]=(char)(z>>16);

  347. 		dst[2]=(char)(z>>8);

  348. 		dst[3]=(char)(z);

  349. #elif __BYTE_ORDER == __BIG_ENDIAN

  350. 		dst[0]=(char)(z);

  351. 		dst[1]=(char)(z>>8);

  352. 		dst[2]=(char)(z>>16);

  353. 		dst[3]=(char)(z>>24);

  354. #endif

  355. 		dst += dst_skip;

  356. 		src++;

  357. 	}

  358. 	state->rm1 = rm1;

  359. 	state->idx = idx;

  360. }

  361. 

  362. void sample_move_dither_shaped_d32u24_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  363. 	

  364. {

  365. 	jack_default_audio_sample_t     x;

  366. 	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */

  367. 	jack_default_audio_sample_t     xp; /* x' */

  368. 	float        r;

  369. 	float        rm1 = state->rm1;

  370. 	unsigned int idx = state->idx;

  371. 	long long    y;

  372. 

  373. 	while (nsamples--) {

  374. 		x = *src * (float)SAMPLE_MAX_16BIT;

  375. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  376. 		/* Filter the error with Lipshitz's minimally audible FIR:

  377. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  378. 		xe = x

  379. 		     - state->e[idx] * 2.033f

  380. 		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f

  381. 		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f

  382. 		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f

  383. 		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;

  384. 		xp = xe + r - rm1;

  385. 		rm1 = r;

  386. 

  387. 		/* This could be some inline asm on x86 */

  388. 		y = (long long)f_round(xp);

  389. 

  390. 		/* Intrinsic z^-1 delay */

  391. 		idx = (idx + 1) & DITHER_BUF_MASK;

  392. 		state->e[idx] = y - xe;

  393. 

  394. 		y <<= 16;

  395. 

  396. 		if (y > INT_MAX) {

  397. 			*((int *) dst) = INT_MAX;

  398. 		} else if (y < INT_MIN) {

  399. 			*((int *) dst) = INT_MIN;

  400. 		} else {

  401. 			*((int *) dst) = y;

  402. 		}

  403. 		dst += dst_skip;

  404. 		src++;

  405. 	}

  406. 	state->rm1 = rm1;

  407. 	state->idx = idx;

  408. }

  409. 

  410. void sample_move_d24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  411. 

  412. {

  413.         long long y;

  414. 	int z;

  415. 

  416. 	while (nsamples--) {

  417. 		y = (long long)(*src * SAMPLE_MAX_24BIT);

  418. 

  419. 		if (y > (INT_MAX >> 8 )) {

  420. 			z = (INT_MAX >> 8);

  421. 		} else if (y < (INT_MIN >> 8 )) {

  422. 			z = (INT_MIN >> 8 );

  423. 		} else {

  424. 			z = (int)y;

  425. 		}

  426. #if __BYTE_ORDER == __LITTLE_ENDIAN

  427. 		dst[0]=(char)(z>>16);

  428. 		dst[1]=(char)(z>>8);

  429. 		dst[2]=(char)(z);

  430. #elif __BYTE_ORDER == __BIG_ENDIAN

  431. 		dst[0]=(char)(z);

  432. 		dst[1]=(char)(z>>8);

  433. 		dst[2]=(char)(z>>16);

  434. #endif

  435. 		dst += dst_skip;

  436. 		src++;

  437. 	}

  438. }	

  439. 

  440. void sample_move_d24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  441. 

  442. {

  443.         long long y;

  444. 

  445. 	while (nsamples--) {

  446. 		y = (long long)(*src * SAMPLE_MAX_24BIT);

  447. 

  448. 		if (y > (INT_MAX >> 8 )) {

  449. 			y = (INT_MAX >> 8);

  450. 		} else if (y < (INT_MIN >> 8 )) {

  451. 			y = (INT_MIN >> 8 );

  452. 		}

  453. #if __BYTE_ORDER == __LITTLE_ENDIAN

  454. 		memcpy (dst, &y, 3);

  455. #elif __BYTE_ORDER == __BIG_ENDIAN

  456. 		memcpy (dst, (char *)&y + 5, 3);

  457. #endif

  458. 		dst += dst_skip;

  459. 		src++;

  460. 	}

  461. }	

  462. 

  463. void sample_move_dS_s24s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)

  464. {

  465. 	/* ALERT: signed sign-extension portability !!! */

  466. 

  467. 	while (nsamples--) {

  468. 		int x;

  469. #if __BYTE_ORDER == __LITTLE_ENDIAN

  470. 		x = (unsigned char)(src[0]);

  471. 		x <<= 8;

  472. 		x |= (unsigned char)(src[1]);

  473. 		x <<= 8;

  474. 		x |= (unsigned char)(src[2]);

  475. 		/* correct sign bit and the rest of the top byte */

  476. 		if (src[0] & 0x80) {

  477. 			x |= 0xff << 24;

  478. 		}

  479. #elif __BYTE_ORDER == __BIG_ENDIAN

  480. 		x = (unsigned char)(src[2]);

  481. 		x <<= 8;

  482. 		x |= (unsigned char)(src[1]);

  483. 		x <<= 8;

  484. 		x |= (unsigned char)(src[0]);

  485. 		/* correct sign bit and the rest of the top byte */

  486. 		if (src[0] & 0x80) {

  487. 			x |= 0xff << 24;

  488. 		}

  489. #endif

  490. 		*dst = x / SAMPLE_MAX_24BIT;

  491. 		dst++;

  492. 		src += src_skip;

  493. 	}

  494. }	

  495. 

  496. void sample_move_dS_s24 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)

  497. {

  498. 	/* ALERT: signed sign-extension portability !!! */

  499. 

  500. 	while (nsamples--) {

  501. 		int x;

  502. #if __BYTE_ORDER == __LITTLE_ENDIAN

  503. 		memcpy((char*)&x + 1, src, 3);

  504. #elif __BYTE_ORDER == __BIG_ENDIAN

  505. 		memcpy(&x, src, 3);

  506. #endif

  507. 		x >>= 8;

  508. 		*dst = x / SAMPLE_MAX_24BIT;

  509. 		dst++;

  510. 		src += src_skip;

  511. 	}

  512. }	

  513. 

  514. void sample_move_dither_rect_d24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  515. 

  516. {

  517. 	/* ALERT: signed sign-extension portability !!! */

  518. 	jack_default_audio_sample_t  x;

  519. 	long long y;

  520. 	int z;

  521. 

  522. 	while (nsamples--) {

  523. 		x = *src * SAMPLE_MAX_16BIT;

  524. 		x -= (float)fast_rand() / (float)INT_MAX;

  525. 		y = (long long)f_round(x);

  526. 

  527. 		y <<= 8;

  528. 

  529. 		if (y > (INT_MAX >> 8)) {

  530. 			z = (INT_MAX >> 8);

  531. 		} else if (y < (INT_MIN >> 8)) {

  532. 			z = (INT_MIN >> 8);

  533. 		} else {

  534. 			z = (int)y;

  535. 		}

  536. #if __BYTE_ORDER == __LITTLE_ENDIAN

  537. 		dst[0]=(char)(z>>16);

  538. 		dst[1]=(char)(z>>8);

  539. 		dst[2]=(char)(z);

  540. #elif __BYTE_ORDER == __BIG_ENDIAN

  541. 		dst[0]=(char)(z);

  542. 		dst[1]=(char)(z>>8);

  543. 		dst[2]=(char)(z>>16);

  544. #endif

  545. 		dst += dst_skip;

  546. 		src++;

  547. 	}

  548. }	

  549. 

  550. void sample_move_dither_rect_d24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  551. 

  552. {

  553. 	/* ALERT: signed sign-extension portability !!! */

  554. 	jack_default_audio_sample_t  x;

  555. 	long long y;

  556. 

  557. 	while (nsamples--) {

  558. 		x = *src * SAMPLE_MAX_16BIT;

  559. 		x -= (float)fast_rand() / (float)INT_MAX;

  560. 		y = (long long)f_round(x);

  561. 

  562. 		y <<= 8;

  563. 

  564. 		if (y > (INT_MAX >> 8)) {

  565. 			y = (INT_MAX >> 8);

  566. 		} else if (y < (INT_MIN >> 8)) {

  567. 			y = (INT_MIN >> 8);

  568. 		}

  569. #if __BYTE_ORDER == __LITTLE_ENDIAN

  570. 		memcpy (dst, &y, 3);

  571. #elif __BYTE_ORDER == __BIG_ENDIAN

  572. 		memcpy (dst, (char *)&y + 5, 3);

  573. #endif

  574. 

  575. 		dst += dst_skip;

  576. 		src++;

  577. 	}

  578. }	

  579. 

  580. void sample_move_dither_tri_d24_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  581. 	

  582. {

  583. 	jack_default_audio_sample_t  x;

  584. 	float     r;

  585. 	float     rm1 = state->rm1;

  586. 	long long y;

  587. 	int z;

  588. 

  589. 	while (nsamples--) {

  590. 		x = *src * (float)SAMPLE_MAX_16BIT;

  591. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  592. 		x += r - rm1;

  593. 		rm1 = r;

  594. 		y = (long long)f_round(x);

  595. 

  596. 		y <<= 8;

  597. 

  598. 		if (y > (INT_MAX >> 8)) {

  599. 			z = (INT_MAX >> 8);

  600. 		} else if (y < (INT_MIN >> 8)) {

  601. 			z = (INT_MIN >> 8);

  602. 		} else {

  603. 			z = (int)y;

  604. 		}

  605. #if __BYTE_ORDER == __LITTLE_ENDIAN

  606. 		dst[0]=(char)(z>>16);

  607. 		dst[1]=(char)(z>>8);

  608. 		dst[2]=(char)(z);

  609. #elif __BYTE_ORDER == __BIG_ENDIAN

  610. 		dst[0]=(char)(z);

  611. 		dst[1]=(char)(z>>8);

  612. 		dst[2]=(char)(z>>16);

  613. #endif

  614. 		dst += dst_skip;

  615. 		src++;

  616. 	}

  617. 	state->rm1 = rm1;

  618. }

  619. 

  620. void sample_move_dither_tri_d24_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  621. 	

  622. {

  623. 	jack_default_audio_sample_t  x;

  624. 	float     r;

  625. 	float     rm1 = state->rm1;

  626. 	long long y;

  627. 

  628. 	while (nsamples--) {

  629. 		x = *src * (float)SAMPLE_MAX_16BIT;

  630. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  631. 		x += r - rm1;

  632. 		rm1 = r;

  633. 		y = (long long)f_round(x);

  634. 

  635. 		y <<= 8;

  636. 

  637. 		if (y > (INT_MAX >> 8)) {

  638. 			y = (INT_MAX >> 8);

  639. 		} else if (y < (INT_MIN >> 8)) {

  640. 			y = (INT_MIN >> 8);

  641. 		}

  642. #if __BYTE_ORDER == __LITTLE_ENDIAN

  643. 		memcpy (dst, &y, 3);

  644. #elif __BYTE_ORDER == __BIG_ENDIAN

  645. 		memcpy (dst, (char *)&y + 5, 3);

  646. #endif

  647. 

  648. 		dst += dst_skip;

  649. 		src++;

  650. 	}

  651. 	state->rm1 = rm1;

  652. }

  653. 

  654. void sample_move_dither_shaped_d24_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  655. 	

  656. {

  657. 	jack_default_audio_sample_t     x;

  658. 	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */

  659. 	jack_default_audio_sample_t     xp; /* x' */

  660. 	float        r;

  661. 	float        rm1 = state->rm1;

  662. 	unsigned int idx = state->idx;

  663. 	long long    y;

  664. 	int z;

  665. 

  666. 	while (nsamples--) {

  667. 		x = *src * (float)SAMPLE_MAX_16BIT;

  668. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  669. 		/* Filter the error with Lipshitz's minimally audible FIR:

  670. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  671. 		xe = x

  672. 		     - state->e[idx] * 2.033f

  673. 		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f

  674. 		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f

  675. 		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f

  676. 		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;

  677. 		xp = xe + r - rm1;

  678. 		rm1 = r;

  679. 

  680. 		/* This could be some inline asm on x86 */

  681. 		y = (long long)f_round(xp);

  682. 

  683. 		/* Intrinsic z^-1 delay */

  684. 		idx = (idx + 1) & DITHER_BUF_MASK;

  685. 		state->e[idx] = y - xe;

  686. 

  687. 		y <<= 8;

  688. 

  689. 		if (y > (INT_MAX >> 8)) {

  690. 			z = (INT_MAX >> 8);

  691. 		} else if (y < (INT_MIN >> 8)) {

  692. 			z = (INT_MIN >> 8);

  693. 		} else {

  694. 			z = (int)y;

  695. 		}

  696. #if __BYTE_ORDER == __LITTLE_ENDIAN

  697. 		dst[0]=(char)(z>>16);

  698. 		dst[1]=(char)(z>>8);

  699. 		dst[2]=(char)(z);

  700. #elif __BYTE_ORDER == __BIG_ENDIAN

  701. 		dst[0]=(char)(z);

  702. 		dst[1]=(char)(z>>8);

  703. 		dst[2]=(char)(z>>16);

  704. #endif

  705. 		dst += dst_skip;

  706. 		src++;

  707. 	}

  708. 	state->rm1 = rm1;

  709. 	state->idx = idx;

  710. }

  711. 

  712. void sample_move_dither_shaped_d24_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  713. 	

  714. {

  715. 	jack_default_audio_sample_t     x;

  716. 	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */

  717. 	jack_default_audio_sample_t     xp; /* x' */

  718. 	float        r;

  719. 	float        rm1 = state->rm1;

  720. 	unsigned int idx = state->idx;

  721. 	long long    y;

  722. 

  723. 	while (nsamples--) {

  724. 		x = *src * (float)SAMPLE_MAX_16BIT;

  725. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  726. 		/* Filter the error with Lipshitz's minimally audible FIR:

  727. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  728. 		xe = x

  729. 		     - state->e[idx] * 2.033f

  730. 		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f

  731. 		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f

  732. 		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f

  733. 		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;

  734. 		xp = xe + r - rm1;

  735. 		rm1 = r;

  736. 

  737. 		/* This could be some inline asm on x86 */

  738. 		y = (long long)f_round(xp);

  739. 

  740. 		/* Intrinsic z^-1 delay */

  741. 		idx = (idx + 1) & DITHER_BUF_MASK;

  742. 		state->e[idx] = y - xe;

  743. 

  744. 		y <<= 8;

  745. 

  746. 		if (y > (INT_MAX >> 8)) {

  747. 			y = (INT_MAX >> 8);

  748. 		} else if (y < (INT_MIN >> 8)) {

  749. 			y = (INT_MIN >> 8);

  750. 		}

  751. #if __BYTE_ORDER == __LITTLE_ENDIAN

  752. 		memcpy (dst, &y, 3);

  753. #elif __BYTE_ORDER == __BIG_ENDIAN

  754. 		memcpy (dst, (char *)&y + 5, 3);

  755. #endif

  756. 

  757. 		dst += dst_skip;

  758. 		src++;

  759. 	}

  760. 	state->rm1 = rm1;

  761. 	state->idx = idx;

  762. }

  763. 

  764. void sample_move_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  765. 	

  766. {

  767. 	int tmp;

  768. 

  769. 	/* ALERT: signed sign-extension portability !!! */

  770. 

  771. 	while (nsamples--) {

  772. 		tmp = f_round(*src * SAMPLE_MAX_16BIT);

  773. 		if (tmp > SHRT_MAX) {

  774. 			tmp = SHRT_MAX;

  775. 		} else if (tmp < SHRT_MIN) {

  776. 			tmp = SHRT_MIN;

  777. 		}

  778. #if __BYTE_ORDER == __LITTLE_ENDIAN

  779. 		dst[0]=(char)(tmp>>8);

  780. 		dst[1]=(char)(tmp);

  781. #elif __BYTE_ORDER == __BIG_ENDIAN

  782. 		dst[0]=(char)(tmp);

  783. 		dst[1]=(char)(tmp>>8);

  784. #endif

  785. 		dst += dst_skip;

  786. 		src++;

  787. 	}

  788. }

  789. 

  790. void sample_move_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  791. 	

  792. {

  793. 	int tmp;

  794. 

  795. 	/* ALERT: signed sign-extension portability !!! */

  796. 

  797. 	while (nsamples--) {

  798. 		tmp = f_round(*src * SAMPLE_MAX_16BIT);

  799. 		if (tmp > SHRT_MAX) {

  800. 			*((short *)dst) = SHRT_MAX;

  801. 		} else if (tmp < SHRT_MIN) {

  802. 			*((short *)dst) = SHRT_MIN;

  803. 		} else {

  804. 			*((short *) dst) = (short) tmp;

  805. 		}

  806. 		dst += dst_skip;

  807. 		src++;

  808. 	}

  809. }

  810. 

  811. void sample_move_dither_rect_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  812. 	

  813. {

  814. 	jack_default_audio_sample_t val;

  815. 	int      tmp;

  816. 

  817. 	while (nsamples--) {

  818. 		val = *src * (float)SAMPLE_MAX_16BIT;

  819. 		val -= (float)fast_rand() / (float)INT_MAX;

  820. 		tmp = f_round(val);

  821. 		if (tmp > SHRT_MAX) {

  822. 			tmp = SHRT_MAX;

  823. 		} else if (tmp < SHRT_MIN) {

  824. 			tmp = SHRT_MIN;

  825. 		}

  826. #if __BYTE_ORDER == __LITTLE_ENDIAN

  827. 		dst[0]=(char)(tmp>>8);

  828. 		dst[1]=(char)(tmp);

  829. #elif __BYTE_ORDER == __BIG_ENDIAN

  830. 		dst[0]=(char)(tmp);

  831. 		dst[1]=(char)(tmp>>8);

  832. #endif

  833. 		dst += dst_skip;

  834. 		src++;

  835. 	}

  836. }

  837. 

  838. void sample_move_dither_rect_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  839. 	

  840. {

  841. 	jack_default_audio_sample_t val;

  842. 	int      tmp;

  843. 

  844. 	while (nsamples--) {

  845. 		val = *src * (float)SAMPLE_MAX_16BIT;

  846. 		val -= (float)fast_rand() / (float)INT_MAX;

  847. 		tmp = f_round(val);

  848. 		if (tmp > SHRT_MAX) {

  849. 			*((short *)dst) = SHRT_MAX;

  850. 		} else if (tmp < SHRT_MIN) {

  851. 			*((short *)dst) = SHRT_MIN;

  852. 		} else {

  853. 			*((short *) dst) = (short)tmp;

  854. 		}

  855. 		dst += dst_skip;

  856. 		src++;

  857. 	}

  858. }

  859. 

  860. void sample_move_dither_tri_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  861. 	

  862. {

  863. 	jack_default_audio_sample_t x;

  864. 	float    r;

  865. 	float    rm1 = state->rm1;

  866. 	int      y;

  867. 

  868. 	while (nsamples--) {

  869. 		x = *src * (float)SAMPLE_MAX_16BIT;

  870. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  871. 		x += r - rm1;

  872. 		rm1 = r;

  873. 		y = f_round(x);

  874. 

  875. 		if (y > SHRT_MAX) {

  876. 			y = SHRT_MAX;

  877. 		} else if (y < SHRT_MIN) {

  878. 			y = SHRT_MIN;

  879. 		}

  880. #if __BYTE_ORDER == __LITTLE_ENDIAN

  881. 		dst[0]=(char)(y>>8);

  882. 		dst[1]=(char)(y);

  883. #elif __BYTE_ORDER == __BIG_ENDIAN

  884. 		dst[0]=(char)(y);

  885. 		dst[1]=(char)(y>>8);

  886. #endif

  887. 		dst += dst_skip;

  888. 		src++;

  889. 	}

  890. 	state->rm1 = rm1;

  891. }

  892. 

  893. void sample_move_dither_tri_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  894. 	

  895. {

  896. 	jack_default_audio_sample_t x;

  897. 	float    r;

  898. 	float    rm1 = state->rm1;

  899. 	int      y;

  900. 

  901. 	while (nsamples--) {

  902. 		x = *src * (float)SAMPLE_MAX_16BIT;

  903. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  904. 		x += r - rm1;

  905. 		rm1 = r;

  906. 		y = f_round(x);

  907. 

  908. 		if (y > SHRT_MAX) {

  909. 			*((short *)dst) = SHRT_MAX;

  910. 		} else if (y < SHRT_MIN) {

  911. 			*((short *)dst) = SHRT_MIN;

  912. 		} else {

  913. 			*((short *) dst) = (short)y;

  914. 		}

  915. 

  916. 		dst += dst_skip;

  917. 		src++;

  918. 	}

  919. 	state->rm1 = rm1;

  920. }

  921. 

  922. void sample_move_dither_shaped_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  923. 	

  924. {

  925. 	jack_default_audio_sample_t     x;

  926. 	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */

  927. 	jack_default_audio_sample_t     xp; /* x' */

  928. 	float        r;

  929. 	float        rm1 = state->rm1;

  930. 	unsigned int idx = state->idx;

  931. 	int          y;

  932. 

  933. 	while (nsamples--) {

  934. 		x = *src * (float)SAMPLE_MAX_16BIT;

  935. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  936. 		/* Filter the error with Lipshitz's minimally audible FIR:

  937. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  938. 		xe = x

  939. 		     - state->e[idx] * 2.033f

  940. 		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f

  941. 		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f

  942. 		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f

  943. 		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;

  944. 		xp = xe + r - rm1;

  945. 		rm1 = r;

  946. 

  947. 		/* This could be some inline asm on x86 */

  948. 		y = f_round(xp);

  949. 

  950. 		/* Intrinsic z^-1 delay */

  951. 		idx = (idx + 1) & DITHER_BUF_MASK;

  952. 		state->e[idx] = y - xe;

  953. 

  954. 		if (y > SHRT_MAX) {

  955. 			y = SHRT_MAX;

  956. 		} else if (y < SHRT_MIN) {

  957. 			y = SHRT_MIN;

  958. 		}

  959. #if __BYTE_ORDER == __LITTLE_ENDIAN

  960. 		dst[0]=(char)(y>>8);

  961. 		dst[1]=(char)(y);

  962. #elif __BYTE_ORDER == __BIG_ENDIAN

  963. 		dst[0]=(char)(y);

  964. 		dst[1]=(char)(y>>8);

  965. #endif

  966. 		dst += dst_skip;

  967. 		src++;

  968. 	}

  969. 	state->rm1 = rm1;

  970. 	state->idx = idx;

  971. }

  972. 

  973. void sample_move_dither_shaped_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  974. 	

  975. {

  976. 	jack_default_audio_sample_t     x;

  977. 	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */

  978. 	jack_default_audio_sample_t     xp; /* x' */

  979. 	float        r;

  980. 	float        rm1 = state->rm1;

  981. 	unsigned int idx = state->idx;

  982. 	int          y;

  983. 

  984. 	while (nsamples--) {

  985. 		x = *src * (float)SAMPLE_MAX_16BIT;

  986. 		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;

  987. 		/* Filter the error with Lipshitz's minimally audible FIR:

  988. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  989. 		xe = x

  990. 		     - state->e[idx] * 2.033f

  991. 		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f

  992. 		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f

  993. 		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f

  994. 		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;

  995. 		xp = xe + r - rm1;

  996. 		rm1 = r;

  997. 

  998. 		/* This could be some inline asm on x86 */

  999. 		y = f_round(xp);

  1000. 

  1001. 		/* Intrinsic z^-1 delay */

  1002. 		idx = (idx + 1) & DITHER_BUF_MASK;

  1003. 		state->e[idx] = y - xe;

  1004. 

  1005. 		if (y > SHRT_MAX) {

  1006. 			*((short *)dst) = SHRT_MAX;

  1007. 		} else if (y < SHRT_MIN) {

  1008. 			*((short *)dst) = SHRT_MIN;

  1009. 		} else {

  1010. 			*((short *) dst) = (short)y;

  1011. 		}

  1012. 		dst += dst_skip;

  1013. 		src++;

  1014. 	}

  1015. 	state->rm1 = rm1;

  1016. 	state->idx = idx;

  1017. }

  1018. 

  1019. void sample_move_dS_s16s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 

  1020. 	

  1021. {

  1022. 	short z;

  1023. 

  1024. 	/* ALERT: signed sign-extension portability !!! */

  1025. 	while (nsamples--) {

  1026. #if __BYTE_ORDER == __LITTLE_ENDIAN

  1027. 		z = (unsigned char)(src[0]);

  1028. 		z <<= 8;

  1029. 		z |= (unsigned char)(src[1]);

  1030. #elif __BYTE_ORDER == __BIG_ENDIAN

  1031. 		z = (unsigned char)(src[1]);

  1032. 		z <<= 8;

  1033. 		z |= (unsigned char)(src[0]);

  1034. #endif

  1035. 		*dst = z / SAMPLE_MAX_16BIT;

  1036. 		dst++;

  1037. 		src += src_skip;

  1038. 	}

  1039. }	

  1040. 

  1041. void sample_move_dS_s16 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 

  1042. 	

  1043. {

  1044. 	/* ALERT: signed sign-extension portability !!! */

  1045. 	while (nsamples--) {

  1046. 		*dst = (*((short *) src)) / SAMPLE_MAX_16BIT;

  1047. 		dst++;

  1048. 		src += src_skip;

  1049. 	}

  1050. }	

  1051. 

  1052. void sample_merge_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1053. {

  1054. 	short val;

  1055. 

  1056. 	/* ALERT: signed sign-extension portability !!! */

  1057. 	

  1058. 	while (nsamples--) {

  1059. 		val = (short) (*src * SAMPLE_MAX_16BIT);

  1060. 		

  1061. 		if (val > SHRT_MAX - *((short *) dst)) {

  1062. 			*((short *)dst) = SHRT_MAX;

  1063. 		} else if (val < SHRT_MIN - *((short *) dst)) {

  1064. 			*((short *)dst) = SHRT_MIN;

  1065. 		} else {

  1066. 			*((short *) dst) += val;

  1067. 		}

  1068. 		dst += dst_skip;

  1069. 		src++;

  1070. 	}

  1071. }	

  1072. 

  1073. void sample_merge_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1074. 

  1075. {

  1076. 	/* ALERT: signed sign-extension portability !!! */

  1077. 

  1078. 	while (nsamples--) {

  1079. 		*((int *) dst) += (((int) (*src * SAMPLE_MAX_24BIT)) << 8);

  1080. 		dst += dst_skip;

  1081. 		src++;

  1082. 	}

  1083. }	

  1084. 

  1085. void memset_interleave (char *dst, char val, unsigned long bytes, 

  1086. 			unsigned long unit_bytes, 

  1087. 			unsigned long skip_bytes) 

  1088. {

  1089. 	switch (unit_bytes) {

  1090. 	case 1:

  1091. 		while (bytes--) {

  1092. 			*dst = val;

  1093. 			dst += skip_bytes;

  1094. 		}

  1095. 		break;

  1096. 	case 2:

  1097. 		while (bytes) {

  1098. 			*((short *) dst) = (short) val;

  1099. 			dst += skip_bytes;

  1100. 			bytes -= 2;

  1101. 		}

  1102. 		break;

  1103. 	case 4:		    

  1104. 		while (bytes) {

  1105. 			*((int *) dst) = (int) val;

  1106. 			dst += skip_bytes;

  1107. 			bytes -= 4;

  1108. 		}

  1109. 		break;

  1110. 	default:

  1111. 		while (bytes) {

  1112. 			memset(dst, val, unit_bytes);

  1113. 			dst += skip_bytes;

  1114. 			bytes -= unit_bytes;

  1115. 		}

  1116. 		break;

  1117. 	}

  1118. }

  1119. 

  1120. /* COPY FUNCTIONS: used to move data from an input channel to an

  1121.    output channel. Note that we assume that the skip distance

  1122.    is the same for both channels. This is completely fine

  1123.    unless the input and output were on different audio interfaces that

  1124.    were interleaved differently. We don't try to handle that.

  1125. */

  1126. 

  1127. void 

  1128. memcpy_fake (char *dst, char *src, unsigned long src_bytes, unsigned long foo, unsigned long bar)

  1129. {

  1130. 	memcpy (dst, src, src_bytes);

  1131. }

  1132. 

  1133. void 

  1134. merge_memcpy_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1135. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1136. {

  1137. 	while (src_bytes) {

  1138. 		*((short *) dst) += *((short *) src);

  1139. 		dst += 2;

  1140. 		src += 2;

  1141. 		src_bytes -= 2;

  1142. 	}

  1143. }

  1144. 

  1145. void 

  1146. merge_memcpy_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1147. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1148. 

  1149. {

  1150. 	while (src_bytes) {

  1151. 		*((int *) dst) += *((int *) src);

  1152. 		dst += 4;

  1153. 		src += 4;

  1154. 		src_bytes -= 4;

  1155. 	}

  1156. }

  1157. 

  1158. void 

  1159. merge_memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes, 

  1160. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1161. 

  1162. {

  1163. 	while (src_bytes) {

  1164. 		*((short *) dst) += *((short *) src);

  1165. 		dst += dst_skip_bytes;

  1166. 		src += src_skip_bytes;

  1167. 		src_bytes -= 2;

  1168. 	}

  1169. }

  1170. 

  1171. void 

  1172. merge_memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1173. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1174. {

  1175. 	while (src_bytes) {

  1176. 		*((int *) dst) += *((int *) src);

  1177. 		dst += dst_skip_bytes;

  1178. 		src += src_skip_bytes;

  1179. 		src_bytes -= 4;

  1180. 	}

  1181. }

  1182. 

  1183. void 

  1184. merge_memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1185. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1186. {

  1187. 	while (src_bytes) {

  1188. 		int acc = (*(int *)dst & 0xFFFFFF) + (*(int *)src & 0xFFFFFF);

  1189. 		memcpy(dst, &acc, 3);

  1190. 		dst += dst_skip_bytes;

  1191. 		src += src_skip_bytes;

  1192. 		src_bytes -= 3;

  1193. 	}

  1194. }

  1195. 

  1196. void 

  1197. memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1198. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1199. {

  1200. 	while (src_bytes) {

  1201. 		*((short *) dst) = *((short *) src);

  1202. 		dst += dst_skip_bytes;

  1203. 		src += src_skip_bytes;

  1204. 		src_bytes -= 2;

  1205. 	}

  1206. }

  1207. 

  1208. void 

  1209. memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1210. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1211. 

  1212. {

  1213. 	while (src_bytes) {

  1214. 		memcpy(dst, src, 3);

  1215. 		dst += dst_skip_bytes;

  1216. 		src += src_skip_bytes;

  1217. 		src_bytes -= 3;

  1218. 	}

  1219. }

  1220. 

  1221. void 

  1222. memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1223. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1224. 

  1225. {

  1226. 	while (src_bytes) {

  1227. 		*((int *) dst) = *((int *) src);

  1228. 		dst += dst_skip_bytes;

  1229. 		src += src_skip_bytes;

  1230. 		src_bytes -= 4;

  1231. 	}

  1232. }