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

  58. 

  59. {

  60.         long long y;

  61. 	int z;

  62. 

  63. 	while (nsamples--) {

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

  65. 		if (y > INT_MAX) {

  66. 			z = INT_MAX;

  67. 		} else if (y < INT_MIN) {

  68. 			z = INT_MIN;

  69. 		} else {

  70. 			z = (int)y;

  71. 		}

  72. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  77. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  82. #endif

  83. 		dst += dst_skip;

  84. 		src++;

  85. 	}

  86. }	

  87. 

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

  89. 

  90. {

  91.         long long y;

  92. 

  93. 	while (nsamples--) {

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

  95. 		if (y > INT_MAX) {

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

  97. 		} else if (y < INT_MIN) {

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

  99. 		} else {

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

  101. 		}

  102. 		dst += dst_skip;

  103. 		src++;

  104. 	}

  105. }	

  106. 

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

  108. {

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

  110. 

  111. 	while (nsamples--) {

  112. 		int x;

  113. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  115. 		x <<= 8;

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

  117. 		x <<= 8;

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

  119. 		x <<= 8;

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

  121. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  123. 		x <<= 8;

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

  125. 		x <<= 8;

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

  127. 		x <<= 8;

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

  129. #endif

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

  131. 		dst++;

  132. 		src += src_skip;

  133. 	}

  134. }	

  135. 

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

  137. {

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

  139. 

  140. 	while (nsamples--) {

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

  142. 		dst++;

  143. 		src += src_skip;

  144. 	}

  145. }	

  146. 

  147. 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)

  148. 

  149. {

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

  151. 	jack_default_audio_sample_t  x;

  152. 	long long y;

  153. 	int z;

  154. 

  155. 	while (nsamples--) {

  156. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  159. 		y <<= 16;

  160. 		if (y > INT_MAX) {

  161. 			z = INT_MAX;

  162. 		} else if (y < INT_MIN) {

  163. 			z = INT_MIN;

  164. 		} else {

  165. 			z = (int)y;

  166. 		}

  167. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  172. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  177. #endif

  178. 		dst += dst_skip;

  179. 		src++;

  180. 	}

  181. }	

  182. 

  183. 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)

  184. 

  185. {

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

  187. 	jack_default_audio_sample_t  x;

  188. 	long long y;

  189. 

  190. 	while (nsamples--) {

  191. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  194. 		y <<= 16;

  195. 		if (y > INT_MAX) {

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

  197. 		} else if (y < INT_MIN) {

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

  199. 		} else {

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

  201. 		}

  202. 		dst += dst_skip;

  203. 		src++;

  204. 	}

  205. }	

  206. 

  207. 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)

  208. 	

  209. {

  210. 	jack_default_audio_sample_t  x;

  211. 	float     r;

  212. 	float     rm1 = state->rm1;

  213. 	long long y;

  214. 	int z;

  215. 

  216. 	while (nsamples--) {

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

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

  219. 		x += r - rm1;

  220. 		rm1 = r;

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

  222. 		y <<= 16;

  223. 

  224. 		if (y > INT_MAX) {

  225. 			z = INT_MAX;

  226. 		} else if (y < INT_MIN) {

  227. 			z = INT_MIN;

  228. 		} else {

  229. 			z = (int)y;

  230. 		}

  231. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  236. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  241. #endif

  242. 		dst += dst_skip;

  243. 		src++;

  244. 	}

  245. 	state->rm1 = rm1;

  246. }

  247. 

  248. 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)

  249. 	

  250. {

  251. 	jack_default_audio_sample_t  x;

  252. 	float     r;

  253. 	float     rm1 = state->rm1;

  254. 	long long y;

  255. 

  256. 	while (nsamples--) {

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

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

  259. 		x += r - rm1;

  260. 		rm1 = r;

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

  262. 		y <<= 16;

  263. 

  264. 		if (y > INT_MAX) {

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

  266. 		} else if (y < INT_MIN) {

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

  268. 		} else {

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

  270. 		}

  271. 

  272. 		dst += dst_skip;

  273. 		src++;

  274. 	}

  275. 	state->rm1 = rm1;

  276. }

  277. 

  278. 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)

  279. 	

  280. {

  281. 	jack_default_audio_sample_t     x;

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

  283. 	jack_default_audio_sample_t     xp; /* x' */

  284. 	float        r;

  285. 	float        rm1 = state->rm1;

  286. 	unsigned int idx = state->idx;

  287. 	long long    y;

  288. 	int z;

  289. 

  290. 	while (nsamples--) {

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

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

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

  294. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  295. 		xe = x

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

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

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

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

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

  301. 		xp = xe + r - rm1;

  302. 		rm1 = r;

  303. 

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

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

  306. 

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

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

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

  310. 

  311. 		y <<= 16;

  312. 

  313. 		if (y > INT_MAX) {

  314. 			z = INT_MAX;

  315. 		} else if (y < INT_MIN) {

  316. 			z = INT_MIN;

  317. 		} else {

  318. 			z = (int)y;

  319. 		}

  320. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  325. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  330. #endif

  331. 		dst += dst_skip;

  332. 		src++;

  333. 	}

  334. 	state->rm1 = rm1;

  335. 	state->idx = idx;

  336. }

  337. 

  338. 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)

  339. 	

  340. {

  341. 	jack_default_audio_sample_t     x;

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

  343. 	jack_default_audio_sample_t     xp; /* x' */

  344. 	float        r;

  345. 	float        rm1 = state->rm1;

  346. 	unsigned int idx = state->idx;

  347. 	long long    y;

  348. 

  349. 	while (nsamples--) {

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

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

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

  353. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  354. 		xe = x

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

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

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

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

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

  360. 		xp = xe + r - rm1;

  361. 		rm1 = r;

  362. 

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

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

  365. 

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

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

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

  369. 

  370. 		y <<= 16;

  371. 

  372. 		if (y > INT_MAX) {

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

  374. 		} else if (y < INT_MIN) {

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

  376. 		} else {

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

  378. 		}

  379. 		dst += dst_skip;

  380. 		src++;

  381. 	}

  382. 	state->rm1 = rm1;

  383. 	state->idx = idx;

  384. }

  385. 

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

  387. 

  388. {

  389.         long long y;

  390. 	int z;

  391. 

  392. 	while (nsamples--) {

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

  394. 

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

  396. 			z = (INT_MAX >> 8);

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

  398. 			z = (INT_MIN >> 8 );

  399. 		} else {

  400. 			z = (int)y;

  401. 		}

  402. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  406. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  410. #endif

  411. 		dst += dst_skip;

  412. 		src++;

  413. 	}

  414. }	

  415. 

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

  417. 

  418. {

  419.         long long y;

  420. 

  421. 	while (nsamples--) {

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

  423. 

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

  425. 			y = (INT_MAX >> 8);

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

  427. 			y = (INT_MIN >> 8 );

  428. 		}

  429. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  431. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  433. #endif

  434. 		dst += dst_skip;

  435. 		src++;

  436. 	}

  437. }	

  438. 

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

  440. {

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

  442. 

  443. 	while (nsamples--) {

  444. 		int x;

  445. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  447. 		x <<= 8;

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

  449. 		x <<= 8;

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

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

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

  453. 			x |= 0xff << 24;

  454. 		}

  455. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  457. 		x <<= 8;

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

  459. 		x <<= 8;

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

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

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

  463. 			x |= 0xff << 24;

  464. 		}

  465. #endif

  466. 		*dst = x / SAMPLE_MAX_24BIT;

  467. 		dst++;

  468. 		src += src_skip;

  469. 	}

  470. }	

  471. 

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

  473. {

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

  475. 

  476. 	while (nsamples--) {

  477. 		int x;

  478. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  480. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  482. #endif

  483. 		x >>= 8;

  484. 		*dst = x / SAMPLE_MAX_24BIT;

  485. 		dst++;

  486. 		src += src_skip;

  487. 	}

  488. }	

  489. 

  490. 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)

  491. 

  492. {

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

  494. 	jack_default_audio_sample_t  x;

  495. 	long long y;

  496. 	int z;

  497. 

  498. 	while (nsamples--) {

  499. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  502. 

  503. 		y <<= 8;

  504. 

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

  506. 			z = (INT_MAX >> 8);

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

  508. 			z = (INT_MIN >> 8);

  509. 		} else {

  510. 			z = (int)y;

  511. 		}

  512. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  516. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  520. #endif

  521. 		dst += dst_skip;

  522. 		src++;

  523. 	}

  524. }	

  525. 

  526. 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)

  527. 

  528. {

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

  530. 	jack_default_audio_sample_t  x;

  531. 	long long y;

  532. 

  533. 	while (nsamples--) {

  534. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  537. 

  538. 		y <<= 8;

  539. 

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

  541. 			y = (INT_MAX >> 8);

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

  543. 			y = (INT_MIN >> 8);

  544. 		}

  545. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  547. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  549. #endif

  550. 

  551. 		dst += dst_skip;

  552. 		src++;

  553. 	}

  554. }	

  555. 

  556. 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)

  557. 	

  558. {

  559. 	jack_default_audio_sample_t  x;

  560. 	float     r;

  561. 	float     rm1 = state->rm1;

  562. 	long long y;

  563. 	int z;

  564. 

  565. 	while (nsamples--) {

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

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

  568. 		x += r - rm1;

  569. 		rm1 = r;

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

  571. 

  572. 		y <<= 8;

  573. 

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

  575. 			z = (INT_MAX >> 8);

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

  577. 			z = (INT_MIN >> 8);

  578. 		} else {

  579. 			z = (int)y;

  580. 		}

  581. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  585. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  589. #endif

  590. 		dst += dst_skip;

  591. 		src++;

  592. 	}

  593. 	state->rm1 = rm1;

  594. }

  595. 

  596. 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)

  597. 	

  598. {

  599. 	jack_default_audio_sample_t  x;

  600. 	float     r;

  601. 	float     rm1 = state->rm1;

  602. 	long long y;

  603. 

  604. 	while (nsamples--) {

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

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

  607. 		x += r - rm1;

  608. 		rm1 = r;

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

  610. 

  611. 		y <<= 8;

  612. 

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

  614. 			y = (INT_MAX >> 8);

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

  616. 			y = (INT_MIN >> 8);

  617. 		}

  618. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  620. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  622. #endif

  623. 

  624. 		dst += dst_skip;

  625. 		src++;

  626. 	}

  627. 	state->rm1 = rm1;

  628. }

  629. 

  630. 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)

  631. 	

  632. {

  633. 	jack_default_audio_sample_t     x;

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

  635. 	jack_default_audio_sample_t     xp; /* x' */

  636. 	float        r;

  637. 	float        rm1 = state->rm1;

  638. 	unsigned int idx = state->idx;

  639. 	long long    y;

  640. 	int z;

  641. 

  642. 	while (nsamples--) {

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

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

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

  646. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  647. 		xe = x

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

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

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

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

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

  653. 		xp = xe + r - rm1;

  654. 		rm1 = r;

  655. 

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

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

  658. 

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

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

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

  662. 

  663. 		y <<= 8;

  664. 

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

  666. 			z = (INT_MAX >> 8);

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

  668. 			z = (INT_MIN >> 8);

  669. 		} else {

  670. 			z = (int)y;

  671. 		}

  672. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  676. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  680. #endif

  681. 		dst += dst_skip;

  682. 		src++;

  683. 	}

  684. 	state->rm1 = rm1;

  685. 	state->idx = idx;

  686. }

  687. 

  688. 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)

  689. 	

  690. {

  691. 	jack_default_audio_sample_t     x;

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

  693. 	jack_default_audio_sample_t     xp; /* x' */

  694. 	float        r;

  695. 	float        rm1 = state->rm1;

  696. 	unsigned int idx = state->idx;

  697. 	long long    y;

  698. 

  699. 	while (nsamples--) {

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

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

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

  703. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  704. 		xe = x

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

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

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

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

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

  710. 		xp = xe + r - rm1;

  711. 		rm1 = r;

  712. 

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

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

  715. 

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

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

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

  719. 

  720. 		y <<= 8;

  721. 

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

  723. 			y = (INT_MAX >> 8);

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

  725. 			y = (INT_MIN >> 8);

  726. 		}

  727. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  729. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  731. #endif

  732. 

  733. 		dst += dst_skip;

  734. 		src++;

  735. 	}

  736. 	state->rm1 = rm1;

  737. 	state->idx = idx;

  738. }

  739. 

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

  741. 	

  742. {

  743. 	int tmp;

  744. 

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

  746. 

  747. 	while (nsamples--) {

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

  749. 		if (tmp > SHRT_MAX) {

  750. 			tmp = SHRT_MAX;

  751. 		} else if (tmp < SHRT_MIN) {

  752. 			tmp = SHRT_MIN;

  753. 		}

  754. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  757. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  760. #endif

  761. 		dst += dst_skip;

  762. 		src++;

  763. 	}

  764. }

  765. 

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

  767. 	

  768. {

  769. 	int tmp;

  770. 

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

  772. 

  773. 	while (nsamples--) {

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

  775. 		if (tmp > SHRT_MAX) {

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

  777. 		} else if (tmp < SHRT_MIN) {

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

  779. 		} else {

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

  781. 		}

  782. 		dst += dst_skip;

  783. 		src++;

  784. 	}

  785. }

  786. 

  787. 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)

  788. 	

  789. {

  790. 	jack_default_audio_sample_t val;

  791. 	int      tmp;

  792. 

  793. 	while (nsamples--) {

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

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

  796. 		tmp = f_round(val);

  797. 		if (tmp > SHRT_MAX) {

  798. 			tmp = SHRT_MAX;

  799. 		} else if (tmp < SHRT_MIN) {

  800. 			tmp = SHRT_MIN;

  801. 		}

  802. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  805. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  808. #endif

  809. 		dst += dst_skip;

  810. 		src++;

  811. 	}

  812. }

  813. 

  814. 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)

  815. 	

  816. {

  817. 	jack_default_audio_sample_t val;

  818. 	int      tmp;

  819. 

  820. 	while (nsamples--) {

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

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

  823. 		tmp = f_round(val);

  824. 		if (tmp > SHRT_MAX) {

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

  826. 		} else if (tmp < SHRT_MIN) {

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

  828. 		} else {

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

  830. 		}

  831. 		dst += dst_skip;

  832. 		src++;

  833. 	}

  834. }

  835. 

  836. 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)

  837. 	

  838. {

  839. 	jack_default_audio_sample_t x;

  840. 	float    r;

  841. 	float    rm1 = state->rm1;

  842. 	int      y;

  843. 

  844. 	while (nsamples--) {

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

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

  847. 		x += r - rm1;

  848. 		rm1 = r;

  849. 		y = f_round(x);

  850. 

  851. 		if (y > SHRT_MAX) {

  852. 			y = SHRT_MAX;

  853. 		} else if (y < SHRT_MIN) {

  854. 			y = SHRT_MIN;

  855. 		}

  856. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  859. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  862. #endif

  863. 		dst += dst_skip;

  864. 		src++;

  865. 	}

  866. 	state->rm1 = rm1;

  867. }

  868. 

  869. 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)

  870. 	

  871. {

  872. 	jack_default_audio_sample_t x;

  873. 	float    r;

  874. 	float    rm1 = state->rm1;

  875. 	int      y;

  876. 

  877. 	while (nsamples--) {

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

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

  880. 		x += r - rm1;

  881. 		rm1 = r;

  882. 		y = f_round(x);

  883. 

  884. 		if (y > SHRT_MAX) {

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

  886. 		} else if (y < SHRT_MIN) {

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

  888. 		} else {

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

  890. 		}

  891. 

  892. 		dst += dst_skip;

  893. 		src++;

  894. 	}

  895. 	state->rm1 = rm1;

  896. }

  897. 

  898. 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)

  899. 	

  900. {

  901. 	jack_default_audio_sample_t     x;

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

  903. 	jack_default_audio_sample_t     xp; /* x' */

  904. 	float        r;

  905. 	float        rm1 = state->rm1;

  906. 	unsigned int idx = state->idx;

  907. 	int          y;

  908. 

  909. 	while (nsamples--) {

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

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

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

  913. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  914. 		xe = x

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

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

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

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

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

  920. 		xp = xe + r - rm1;

  921. 		rm1 = r;

  922. 

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

  924. 		y = f_round(xp);

  925. 

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

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

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

  929. 

  930. 		if (y > SHRT_MAX) {

  931. 			y = SHRT_MAX;

  932. 		} else if (y < SHRT_MIN) {

  933. 			y = SHRT_MIN;

  934. 		}

  935. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  938. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  941. #endif

  942. 		dst += dst_skip;

  943. 		src++;

  944. 	}

  945. 	state->rm1 = rm1;

  946. 	state->idx = idx;

  947. }

  948. 

  949. 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)

  950. 	

  951. {

  952. 	jack_default_audio_sample_t     x;

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

  954. 	jack_default_audio_sample_t     xp; /* x' */

  955. 	float        r;

  956. 	float        rm1 = state->rm1;

  957. 	unsigned int idx = state->idx;

  958. 	int          y;

  959. 

  960. 	while (nsamples--) {

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

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

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

  964. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  965. 		xe = x

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

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

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

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

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

  971. 		xp = xe + r - rm1;

  972. 		rm1 = r;

  973. 

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

  975. 		y = f_round(xp);

  976. 

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

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

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

  980. 

  981. 		if (y > SHRT_MAX) {

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

  983. 		} else if (y < SHRT_MIN) {

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

  985. 		} else {

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

  987. 		}

  988. 		dst += dst_skip;

  989. 		src++;

  990. 	}

  991. 	state->rm1 = rm1;

  992. 	state->idx = idx;

  993. }

  994. 

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

  996. 	

  997. {

  998. 	short z;

  999. 

  1000. 	/* ALERT: signed sign-extension portability !!! */

  1001. 	while (nsamples--) {

  1002. #if __BYTE_ORDER == __LITTLE_ENDIAN

  1003. 		z = (unsigned char)(src[0]);

  1004. 		z <<= 8;

  1005. 		z |= (unsigned char)(src[1]);

  1006. #elif __BYTE_ORDER == __BIG_ENDIAN

  1007. 		z = (unsigned char)(src[1]);

  1008. 		z <<= 8;

  1009. 		z |= (unsigned char)(src[0]);

  1010. #endif

  1011. 		*dst = z / SAMPLE_MAX_16BIT;

  1012. 		dst++;

  1013. 		src += src_skip;

  1014. 	}

  1015. }	

  1016. 

  1017. void sample_move_dS_s16 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 

  1018. 	

  1019. {

  1020. 	/* ALERT: signed sign-extension portability !!! */

  1021. 	while (nsamples--) {

  1022. 		*dst = (*((short *) src)) / SAMPLE_MAX_16BIT;

  1023. 		dst++;

  1024. 		src += src_skip;

  1025. 	}

  1026. }	

  1027. 

  1028. void sample_merge_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1029. {

  1030. 	short val;

  1031. 

  1032. 	/* ALERT: signed sign-extension portability !!! */

  1033. 	

  1034. 	while (nsamples--) {

  1035. 		val = (short) (*src * SAMPLE_MAX_16BIT);

  1036. 		

  1037. 		if (val > SHRT_MAX - *((short *) dst)) {

  1038. 			*((short *)dst) = SHRT_MAX;

  1039. 		} else if (val < SHRT_MIN - *((short *) dst)) {

  1040. 			*((short *)dst) = SHRT_MIN;

  1041. 		} else {

  1042. 			*((short *) dst) += val;

  1043. 		}

  1044. 		dst += dst_skip;

  1045. 		src++;

  1046. 	}

  1047. }	

  1048. 

  1049. void sample_merge_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1050. 

  1051. {

  1052. 	/* ALERT: signed sign-extension portability !!! */

  1053. 

  1054. 	while (nsamples--) {

  1055. 		*((int *) dst) += (((int) (*src * SAMPLE_MAX_24BIT)) << 8);

  1056. 		dst += dst_skip;

  1057. 		src++;

  1058. 	}

  1059. }	

  1060. 

  1061. void memset_interleave (char *dst, char val, unsigned long bytes, 

  1062. 			unsigned long unit_bytes, 

  1063. 			unsigned long skip_bytes) 

  1064. {

  1065. 	switch (unit_bytes) {

  1066. 	case 1:

  1067. 		while (bytes--) {

  1068. 			*dst = val;

  1069. 			dst += skip_bytes;

  1070. 		}

  1071. 		break;

  1072. 	case 2:

  1073. 		while (bytes) {

  1074. 			*((short *) dst) = (short) val;

  1075. 			dst += skip_bytes;

  1076. 			bytes -= 2;

  1077. 		}

  1078. 		break;

  1079. 	case 4:		    

  1080. 		while (bytes) {

  1081. 			*((int *) dst) = (int) val;

  1082. 			dst += skip_bytes;

  1083. 			bytes -= 4;

  1084. 		}

  1085. 		break;

  1086. 	default:

  1087. 		while (bytes) {

  1088. 			memset(dst, val, unit_bytes);

  1089. 			dst += skip_bytes;

  1090. 			bytes -= unit_bytes;

  1091. 		}

  1092. 		break;

  1093. 	}

  1094. }

  1095. 

  1096. /* COPY FUNCTIONS: used to move data from an input channel to an

  1097.    output channel. Note that we assume that the skip distance

  1098.    is the same for both channels. This is completely fine

  1099.    unless the input and output were on different audio interfaces that

  1100.    were interleaved differently. We don't try to handle that.

  1101. */

  1102. 

  1103. void 

  1104. memcpy_fake (char *dst, char *src, unsigned long src_bytes, unsigned long foo, unsigned long bar)

  1105. {

  1106. 	memcpy (dst, src, src_bytes);

  1107. }

  1108. 

  1109. void 

  1110. merge_memcpy_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1111. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1112. {

  1113. 	while (src_bytes) {

  1114. 		*((short *) dst) += *((short *) src);

  1115. 		dst += 2;

  1116. 		src += 2;

  1117. 		src_bytes -= 2;

  1118. 	}

  1119. }

  1120. 

  1121. void 

  1122. merge_memcpy_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1123. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1124. 

  1125. {

  1126. 	while (src_bytes) {

  1127. 		*((int *) dst) += *((int *) src);

  1128. 		dst += 4;

  1129. 		src += 4;

  1130. 		src_bytes -= 4;

  1131. 	}

  1132. }

  1133. 

  1134. void 

  1135. merge_memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes, 

  1136. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1137. 

  1138. {

  1139. 	while (src_bytes) {

  1140. 		*((short *) dst) += *((short *) src);

  1141. 		dst += dst_skip_bytes;

  1142. 		src += src_skip_bytes;

  1143. 		src_bytes -= 2;

  1144. 	}

  1145. }

  1146. 

  1147. void 

  1148. merge_memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1149. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1150. {

  1151. 	while (src_bytes) {

  1152. 		*((int *) dst) += *((int *) src);

  1153. 		dst += dst_skip_bytes;

  1154. 		src += src_skip_bytes;

  1155. 		src_bytes -= 4;

  1156. 	}

  1157. }

  1158. 

  1159. void 

  1160. merge_memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1161. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1162. {

  1163. 	while (src_bytes) {

  1164. 		int acc = (*(int *)dst & 0xFFFFFF) + (*(int *)src & 0xFFFFFF);

  1165. 		memcpy(dst, &acc, 3);

  1166. 		dst += dst_skip_bytes;

  1167. 		src += src_skip_bytes;

  1168. 		src_bytes -= 3;

  1169. 	}

  1170. }

  1171. 

  1172. void 

  1173. memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1174. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1175. {

  1176. 	while (src_bytes) {

  1177. 		*((short *) dst) = *((short *) src);

  1178. 		dst += dst_skip_bytes;

  1179. 		src += src_skip_bytes;

  1180. 		src_bytes -= 2;

  1181. 	}

  1182. }

  1183. 

  1184. void 

  1185. memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1186. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1187. 

  1188. {

  1189. 	while (src_bytes) {

  1190. 		memcpy(dst, src, 3);

  1191. 		dst += dst_skip_bytes;

  1192. 		src += src_skip_bytes;

  1193. 		src_bytes -= 3;

  1194. 	}

  1195. }

  1196. 

  1197. void 

  1198. memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1199. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1200. 

  1201. {

  1202. 	while (src_bytes) {

  1203. 		*((int *) dst) = *((int *) src);

  1204. 		dst += dst_skip_bytes;

  1205. 		src += src_skip_bytes;

  1206. 		src_bytes -= 4;

  1207. 	}

  1208. }