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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. #define _ISOC9X_SOURCE  1

  22. #define _ISOC99_SOURCE  1

  23. 

  24. #define __USE_ISOC9X    1

  25. #define __USE_ISOC99    1

  26. 

  27. #include <stdio.h>

  28. #include <string.h>

  29. #include <math.h>

  30. #include <memory.h>

  31. #include <stdlib.h>

  32. #include <limits.h>

  33. #include <endian.h>

  34. #include "memops.h"

  35. 

  36. 

  37. #define SAMPLE_MAX_24BIT  8388608.0f

  38. #define SAMPLE_MAX_16BIT  32768.0f

  39. 

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

  41. 

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

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

  44. inline unsigned int fast_rand();

  45. 

  46. inline unsigned int fast_rand() {

  47. 	static unsigned int seed = 22222;

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

  49. 

  50. 	return seed;

  51. }

  52. 

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

  54. 

  55. {

  56.         long long y;

  57. 	int z;

  58. 

  59. 	while (nsamples--) {

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

  61. 		if (y > INT_MAX) {

  62. 			z = INT_MAX;

  63. 		} else if (y < INT_MIN) {

  64. 			z = INT_MIN;

  65. 		} else {

  66. 			z = (int)y;

  67. 		}

  68. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  73. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  78. #endif

  79. 		dst += dst_skip;

  80. 		src++;

  81. 	}

  82. }	

  83. 

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

  85. 

  86. {

  87.         long long y;

  88. 

  89. 	while (nsamples--) {

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

  91. 		if (y > INT_MAX) {

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

  93. 		} else if (y < INT_MIN) {

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

  95. 		} else {

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

  97. 		}

  98. 		dst += dst_skip;

  99. 		src++;

  100. 	}

  101. }	

  102. 

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

  104. {

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

  106. 

  107. 	while (nsamples--) {

  108. 		int x;

  109. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  111. 		x <<= 8;

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

  113. 		x <<= 8;

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

  115. 		x <<= 8;

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

  117. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  119. 		x <<= 8;

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

  121. 		x <<= 8;

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

  123. 		x <<= 8;

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

  125. #endif

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

  127. 		dst++;

  128. 		src += src_skip;

  129. 	}

  130. }	

  131. 

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

  133. {

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

  135. 

  136. 	while (nsamples--) {

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

  138. 		dst++;

  139. 		src += src_skip;

  140. 	}

  141. }	

  142. 

  143. 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)

  144. 

  145. {

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

  147. 	jack_default_audio_sample_t  x;

  148. 	long long y;

  149. 	int z;

  150. 

  151. 	while (nsamples--) {

  152. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  155. 		y <<= 16;

  156. 		if (y > INT_MAX) {

  157. 			z = INT_MAX;

  158. 		} else if (y < INT_MIN) {

  159. 			z = INT_MIN;

  160. 		} else {

  161. 			z = (int)y;

  162. 		}

  163. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  168. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  173. #endif

  174. 		dst += dst_skip;

  175. 		src++;

  176. 	}

  177. }	

  178. 

  179. 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)

  180. 

  181. {

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

  183. 	jack_default_audio_sample_t  x;

  184. 	long long y;

  185. 

  186. 	while (nsamples--) {

  187. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  190. 		y <<= 16;

  191. 		if (y > INT_MAX) {

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

  193. 		} else if (y < INT_MIN) {

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

  195. 		} else {

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

  197. 		}

  198. 		dst += dst_skip;

  199. 		src++;

  200. 	}

  201. }	

  202. 

  203. 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)

  204. 	

  205. {

  206. 	jack_default_audio_sample_t  x;

  207. 	float     r;

  208. 	float     rm1 = state->rm1;

  209. 	long long y;

  210. 	int z;

  211. 

  212. 	while (nsamples--) {

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

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

  215. 		x += r - rm1;

  216. 		rm1 = r;

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

  218. 		y <<= 16;

  219. 

  220. 		if (y > INT_MAX) {

  221. 			z = INT_MAX;

  222. 		} else if (y < INT_MIN) {

  223. 			z = INT_MIN;

  224. 		} else {

  225. 			z = (int)y;

  226. 		}

  227. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  232. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  237. #endif

  238. 		dst += dst_skip;

  239. 		src++;

  240. 	}

  241. 	state->rm1 = rm1;

  242. }

  243. 

  244. 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)

  245. 	

  246. {

  247. 	jack_default_audio_sample_t  x;

  248. 	float     r;

  249. 	float     rm1 = state->rm1;

  250. 	long long y;

  251. 

  252. 	while (nsamples--) {

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

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

  255. 		x += r - rm1;

  256. 		rm1 = r;

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

  258. 		y <<= 16;

  259. 

  260. 		if (y > INT_MAX) {

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

  262. 		} else if (y < INT_MIN) {

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

  264. 		} else {

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

  266. 		}

  267. 

  268. 		dst += dst_skip;

  269. 		src++;

  270. 	}

  271. 	state->rm1 = rm1;

  272. }

  273. 

  274. 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)

  275. 	

  276. {

  277. 	jack_default_audio_sample_t     x;

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

  279. 	jack_default_audio_sample_t     xp; /* x' */

  280. 	float        r;

  281. 	float        rm1 = state->rm1;

  282. 	unsigned int idx = state->idx;

  283. 	long long    y;

  284. 	int z;

  285. 

  286. 	while (nsamples--) {

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

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

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

  290. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  291. 		xe = x

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

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

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

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

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

  297. 		xp = xe + r - rm1;

  298. 		rm1 = r;

  299. 

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

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

  302. 

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

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

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

  306. 

  307. 		y <<= 16;

  308. 

  309. 		if (y > INT_MAX) {

  310. 			z = INT_MAX;

  311. 		} else if (y < INT_MIN) {

  312. 			z = INT_MIN;

  313. 		} else {

  314. 			z = (int)y;

  315. 		}

  316. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  321. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  326. #endif

  327. 		dst += dst_skip;

  328. 		src++;

  329. 	}

  330. 	state->rm1 = rm1;

  331. 	state->idx = idx;

  332. }

  333. 

  334. 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)

  335. 	

  336. {

  337. 	jack_default_audio_sample_t     x;

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

  339. 	jack_default_audio_sample_t     xp; /* x' */

  340. 	float        r;

  341. 	float        rm1 = state->rm1;

  342. 	unsigned int idx = state->idx;

  343. 	long long    y;

  344. 

  345. 	while (nsamples--) {

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

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

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

  349. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  350. 		xe = x

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

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

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

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

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

  356. 		xp = xe + r - rm1;

  357. 		rm1 = r;

  358. 

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

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

  361. 

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

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

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

  365. 

  366. 		y <<= 16;

  367. 

  368. 		if (y > INT_MAX) {

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

  370. 		} else if (y < INT_MIN) {

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

  372. 		} else {

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

  374. 		}

  375. 		dst += dst_skip;

  376. 		src++;

  377. 	}

  378. 	state->rm1 = rm1;

  379. 	state->idx = idx;

  380. }

  381. 

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

  383. 

  384. {

  385.         long long y;

  386. 	int z;

  387. 

  388. 	while (nsamples--) {

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

  390. 

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

  392. 			z = (INT_MAX >> 8);

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

  394. 			z = (INT_MIN >> 8 );

  395. 		} else {

  396. 			z = (int)y;

  397. 		}

  398. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  402. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  406. #endif

  407. 		dst += dst_skip;

  408. 		src++;

  409. 	}

  410. }	

  411. 

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

  413. 

  414. {

  415.         long long y;

  416. 

  417. 	while (nsamples--) {

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

  419. 

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

  421. 			y = (INT_MAX >> 8);

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

  423. 			y = (INT_MIN >> 8 );

  424. 		}

  425. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  427. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  429. #endif

  430. 		dst += dst_skip;

  431. 		src++;

  432. 	}

  433. }	

  434. 

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

  436. {

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

  438. 

  439. 	while (nsamples--) {

  440. 		int x;

  441. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  443. 		x <<= 8;

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

  445. 		x <<= 8;

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

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

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

  449. 			x |= 0xff << 24;

  450. 		}

  451. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  453. 		x <<= 8;

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

  455. 		x <<= 8;

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

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

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

  459. 			x |= 0xff << 24;

  460. 		}

  461. #endif

  462. 		*dst = x / SAMPLE_MAX_24BIT;

  463. 		dst++;

  464. 		src += src_skip;

  465. 	}

  466. }	

  467. 

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

  469. {

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

  471. 

  472. 	while (nsamples--) {

  473. 		int x;

  474. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  476. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  478. #endif

  479. 		x >>= 8;

  480. 		*dst = x / SAMPLE_MAX_24BIT;

  481. 		dst++;

  482. 		src += src_skip;

  483. 	}

  484. }	

  485. 

  486. 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)

  487. 

  488. {

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

  490. 	jack_default_audio_sample_t  x;

  491. 	long long y;

  492. 	int z;

  493. 

  494. 	while (nsamples--) {

  495. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  498. 

  499. 		y <<= 8;

  500. 

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

  502. 			z = (INT_MAX >> 8);

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

  504. 			z = (INT_MIN >> 8);

  505. 		} else {

  506. 			z = (int)y;

  507. 		}

  508. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  512. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  516. #endif

  517. 		dst += dst_skip;

  518. 		src++;

  519. 	}

  520. }	

  521. 

  522. 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)

  523. 

  524. {

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

  526. 	jack_default_audio_sample_t  x;

  527. 	long long y;

  528. 

  529. 	while (nsamples--) {

  530. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  533. 

  534. 		y <<= 8;

  535. 

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

  537. 			y = (INT_MAX >> 8);

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

  539. 			y = (INT_MIN >> 8);

  540. 		}

  541. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  543. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  545. #endif

  546. 

  547. 		dst += dst_skip;

  548. 		src++;

  549. 	}

  550. }	

  551. 

  552. 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)

  553. 	

  554. {

  555. 	jack_default_audio_sample_t  x;

  556. 	float     r;

  557. 	float     rm1 = state->rm1;

  558. 	long long y;

  559. 	int z;

  560. 

  561. 	while (nsamples--) {

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

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

  564. 		x += r - rm1;

  565. 		rm1 = r;

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

  567. 

  568. 		y <<= 8;

  569. 

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

  571. 			z = (INT_MAX >> 8);

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

  573. 			z = (INT_MIN >> 8);

  574. 		} else {

  575. 			z = (int)y;

  576. 		}

  577. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  581. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  585. #endif

  586. 		dst += dst_skip;

  587. 		src++;

  588. 	}

  589. 	state->rm1 = rm1;

  590. }

  591. 

  592. 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)

  593. 	

  594. {

  595. 	jack_default_audio_sample_t  x;

  596. 	float     r;

  597. 	float     rm1 = state->rm1;

  598. 	long long y;

  599. 

  600. 	while (nsamples--) {

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

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

  603. 		x += r - rm1;

  604. 		rm1 = r;

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

  606. 

  607. 		y <<= 8;

  608. 

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

  610. 			y = (INT_MAX >> 8);

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

  612. 			y = (INT_MIN >> 8);

  613. 		}

  614. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  616. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  618. #endif

  619. 

  620. 		dst += dst_skip;

  621. 		src++;

  622. 	}

  623. 	state->rm1 = rm1;

  624. }

  625. 

  626. 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)

  627. 	

  628. {

  629. 	jack_default_audio_sample_t     x;

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

  631. 	jack_default_audio_sample_t     xp; /* x' */

  632. 	float        r;

  633. 	float        rm1 = state->rm1;

  634. 	unsigned int idx = state->idx;

  635. 	long long    y;

  636. 	int z;

  637. 

  638. 	while (nsamples--) {

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

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

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

  642. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  643. 		xe = x

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

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

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

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

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

  649. 		xp = xe + r - rm1;

  650. 		rm1 = r;

  651. 

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

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

  654. 

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

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

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

  658. 

  659. 		y <<= 8;

  660. 

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

  662. 			z = (INT_MAX >> 8);

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

  664. 			z = (INT_MIN >> 8);

  665. 		} else {

  666. 			z = (int)y;

  667. 		}

  668. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  672. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  676. #endif

  677. 		dst += dst_skip;

  678. 		src++;

  679. 	}

  680. 	state->rm1 = rm1;

  681. 	state->idx = idx;

  682. }

  683. 

  684. 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)

  685. 	

  686. {

  687. 	jack_default_audio_sample_t     x;

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

  689. 	jack_default_audio_sample_t     xp; /* x' */

  690. 	float        r;

  691. 	float        rm1 = state->rm1;

  692. 	unsigned int idx = state->idx;

  693. 	long long    y;

  694. 

  695. 	while (nsamples--) {

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

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

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

  699. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  700. 		xe = x

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

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

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

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

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

  706. 		xp = xe + r - rm1;

  707. 		rm1 = r;

  708. 

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

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

  711. 

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

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

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

  715. 

  716. 		y <<= 8;

  717. 

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

  719. 			y = (INT_MAX >> 8);

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

  721. 			y = (INT_MIN >> 8);

  722. 		}

  723. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  725. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  727. #endif

  728. 

  729. 		dst += dst_skip;

  730. 		src++;

  731. 	}

  732. 	state->rm1 = rm1;

  733. 	state->idx = idx;

  734. }

  735. 

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

  737. 	

  738. {

  739. 	int tmp;

  740. 

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

  742. 

  743. 	while (nsamples--) {

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

  745. 		if (tmp > SHRT_MAX) {

  746. 			tmp = SHRT_MAX;

  747. 		} else if (tmp < SHRT_MIN) {

  748. 			tmp = SHRT_MIN;

  749. 		}

  750. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  753. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  756. #endif

  757. 		dst += dst_skip;

  758. 		src++;

  759. 	}

  760. }

  761. 

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

  763. 	

  764. {

  765. 	int tmp;

  766. 

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

  768. 

  769. 	while (nsamples--) {

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

  771. 		if (tmp > SHRT_MAX) {

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

  773. 		} else if (tmp < SHRT_MIN) {

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

  775. 		} else {

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

  777. 		}

  778. 		dst += dst_skip;

  779. 		src++;

  780. 	}

  781. }

  782. 

  783. 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)

  784. 	

  785. {

  786. 	jack_default_audio_sample_t val;

  787. 	int      tmp;

  788. 

  789. 	while (nsamples--) {

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

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

  792. 		tmp = f_round(val);

  793. 		if (tmp > SHRT_MAX) {

  794. 			tmp = SHRT_MAX;

  795. 		} else if (tmp < SHRT_MIN) {

  796. 			tmp = SHRT_MIN;

  797. 		}

  798. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  801. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  804. #endif

  805. 		dst += dst_skip;

  806. 		src++;

  807. 	}

  808. }

  809. 

  810. 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)

  811. 	

  812. {

  813. 	jack_default_audio_sample_t val;

  814. 	int      tmp;

  815. 

  816. 	while (nsamples--) {

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

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

  819. 		tmp = f_round(val);

  820. 		if (tmp > SHRT_MAX) {

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

  822. 		} else if (tmp < SHRT_MIN) {

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

  824. 		} else {

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

  826. 		}

  827. 		dst += dst_skip;

  828. 		src++;

  829. 	}

  830. }

  831. 

  832. 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)

  833. 	

  834. {

  835. 	jack_default_audio_sample_t x;

  836. 	float    r;

  837. 	float    rm1 = state->rm1;

  838. 	int      y;

  839. 

  840. 	while (nsamples--) {

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

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

  843. 		x += r - rm1;

  844. 		rm1 = r;

  845. 		y = f_round(x);

  846. 

  847. 		if (y > SHRT_MAX) {

  848. 			y = SHRT_MAX;

  849. 		} else if (y < SHRT_MIN) {

  850. 			y = SHRT_MIN;

  851. 		}

  852. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  855. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  858. #endif

  859. 		dst += dst_skip;

  860. 		src++;

  861. 	}

  862. 	state->rm1 = rm1;

  863. }

  864. 

  865. 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)

  866. 	

  867. {

  868. 	jack_default_audio_sample_t x;

  869. 	float    r;

  870. 	float    rm1 = state->rm1;

  871. 	int      y;

  872. 

  873. 	while (nsamples--) {

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

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

  876. 		x += r - rm1;

  877. 		rm1 = r;

  878. 		y = f_round(x);

  879. 

  880. 		if (y > SHRT_MAX) {

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

  882. 		} else if (y < SHRT_MIN) {

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

  884. 		} else {

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

  886. 		}

  887. 

  888. 		dst += dst_skip;

  889. 		src++;

  890. 	}

  891. 	state->rm1 = rm1;

  892. }

  893. 

  894. 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)

  895. 	

  896. {

  897. 	jack_default_audio_sample_t     x;

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

  899. 	jack_default_audio_sample_t     xp; /* x' */

  900. 	float        r;

  901. 	float        rm1 = state->rm1;

  902. 	unsigned int idx = state->idx;

  903. 	int          y;

  904. 

  905. 	while (nsamples--) {

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

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

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

  909. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  910. 		xe = x

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

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

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

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

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

  916. 		xp = xe + r - rm1;

  917. 		rm1 = r;

  918. 

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

  920. 		y = f_round(xp);

  921. 

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

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

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

  925. 

  926. 		if (y > SHRT_MAX) {

  927. 			y = SHRT_MAX;

  928. 		} else if (y < SHRT_MIN) {

  929. 			y = SHRT_MIN;

  930. 		}

  931. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  934. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  937. #endif

  938. 		dst += dst_skip;

  939. 		src++;

  940. 	}

  941. 	state->rm1 = rm1;

  942. 	state->idx = idx;

  943. }

  944. 

  945. 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)

  946. 	

  947. {

  948. 	jack_default_audio_sample_t     x;

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

  950. 	jack_default_audio_sample_t     xp; /* x' */

  951. 	float        r;

  952. 	float        rm1 = state->rm1;

  953. 	unsigned int idx = state->idx;

  954. 	int          y;

  955. 

  956. 	while (nsamples--) {

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

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

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

  960. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  961. 		xe = x

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

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

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

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

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

  967. 		xp = xe + r - rm1;

  968. 		rm1 = r;

  969. 

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

  971. 		y = f_round(xp);

  972. 

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

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

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

  976. 

  977. 		if (y > SHRT_MAX) {

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

  979. 		} else if (y < SHRT_MIN) {

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

  981. 		} else {

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

  983. 		}

  984. 		dst += dst_skip;

  985. 		src++;

  986. 	}

  987. 	state->rm1 = rm1;

  988. 	state->idx = idx;

  989. }

  990. 

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

  992. 	

  993. {

  994. 	short z;

  995. 

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

  997. 	while (nsamples--) {

  998. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  1000. 		z <<= 8;

  1001. 		z |= (unsigned char)(src[1]);

  1002. #elif __BYTE_ORDER == __BIG_ENDIAN

  1003. 		z = (unsigned char)(src[1]);

  1004. 		z <<= 8;

  1005. 		z |= (unsigned char)(src[0]);

  1006. #endif

  1007. 		*dst = z / SAMPLE_MAX_16BIT;

  1008. 		dst++;

  1009. 		src += src_skip;

  1010. 	}

  1011. }	

  1012. 

  1013. void sample_move_dS_s16 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 

  1014. 	

  1015. {

  1016. 	/* ALERT: signed sign-extension portability !!! */

  1017. 	while (nsamples--) {

  1018. 		*dst = (*((short *) src)) / SAMPLE_MAX_16BIT;

  1019. 		dst++;

  1020. 		src += src_skip;

  1021. 	}

  1022. }	

  1023. 

  1024. void sample_merge_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1025. {

  1026. 	short val;

  1027. 

  1028. 	/* ALERT: signed sign-extension portability !!! */

  1029. 	

  1030. 	while (nsamples--) {

  1031. 		val = (short) (*src * SAMPLE_MAX_16BIT);

  1032. 		

  1033. 		if (val > SHRT_MAX - *((short *) dst)) {

  1034. 			*((short *)dst) = SHRT_MAX;

  1035. 		} else if (val < SHRT_MIN - *((short *) dst)) {

  1036. 			*((short *)dst) = SHRT_MIN;

  1037. 		} else {

  1038. 			*((short *) dst) += val;

  1039. 		}

  1040. 		dst += dst_skip;

  1041. 		src++;

  1042. 	}

  1043. }	

  1044. 

  1045. void sample_merge_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1046. 

  1047. {

  1048. 	/* ALERT: signed sign-extension portability !!! */

  1049. 

  1050. 	while (nsamples--) {

  1051. 		*((int *) dst) += (((int) (*src * SAMPLE_MAX_24BIT)) << 8);

  1052. 		dst += dst_skip;

  1053. 		src++;

  1054. 	}

  1055. }	

  1056. 

  1057. void memset_interleave (char *dst, char val, unsigned long bytes, 

  1058. 			unsigned long unit_bytes, 

  1059. 			unsigned long skip_bytes) 

  1060. {

  1061. 	switch (unit_bytes) {

  1062. 	case 1:

  1063. 		while (bytes--) {

  1064. 			*dst = val;

  1065. 			dst += skip_bytes;

  1066. 		}

  1067. 		break;

  1068. 	case 2:

  1069. 		while (bytes) {

  1070. 			*((short *) dst) = (short) val;

  1071. 			dst += skip_bytes;

  1072. 			bytes -= 2;

  1073. 		}

  1074. 		break;

  1075. 	case 4:		    

  1076. 		while (bytes) {

  1077. 			*((int *) dst) = (int) val;

  1078. 			dst += skip_bytes;

  1079. 			bytes -= 4;

  1080. 		}

  1081. 		break;

  1082. 	default:

  1083. 		while (bytes) {

  1084. 			memset(dst, val, unit_bytes);

  1085. 			dst += skip_bytes;

  1086. 			bytes -= unit_bytes;

  1087. 		}

  1088. 		break;

  1089. 	}

  1090. }

  1091. 

  1092. /* COPY FUNCTIONS: used to move data from an input channel to an

  1093.    output channel. Note that we assume that the skip distance

  1094.    is the same for both channels. This is completely fine

  1095.    unless the input and output were on different audio interfaces that

  1096.    were interleaved differently. We don't try to handle that.

  1097. */

  1098. 

  1099. void 

  1100. memcpy_fake (char *dst, char *src, unsigned long src_bytes, unsigned long foo, unsigned long bar)

  1101. {

  1102. 	memcpy (dst, src, src_bytes);

  1103. }

  1104. 

  1105. void 

  1106. merge_memcpy_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1107. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1108. {

  1109. 	while (src_bytes) {

  1110. 		*((short *) dst) += *((short *) src);

  1111. 		dst += 2;

  1112. 		src += 2;

  1113. 		src_bytes -= 2;

  1114. 	}

  1115. }

  1116. 

  1117. void 

  1118. merge_memcpy_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1119. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1120. 

  1121. {

  1122. 	while (src_bytes) {

  1123. 		*((int *) dst) += *((int *) src);

  1124. 		dst += 4;

  1125. 		src += 4;

  1126. 		src_bytes -= 4;

  1127. 	}

  1128. }

  1129. 

  1130. void 

  1131. merge_memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes, 

  1132. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1133. 

  1134. {

  1135. 	while (src_bytes) {

  1136. 		*((short *) dst) += *((short *) src);

  1137. 		dst += dst_skip_bytes;

  1138. 		src += src_skip_bytes;

  1139. 		src_bytes -= 2;

  1140. 	}

  1141. }

  1142. 

  1143. void 

  1144. merge_memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1145. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1146. {

  1147. 	while (src_bytes) {

  1148. 		*((int *) dst) += *((int *) src);

  1149. 		dst += dst_skip_bytes;

  1150. 		src += src_skip_bytes;

  1151. 		src_bytes -= 4;

  1152. 	}

  1153. }

  1154. 

  1155. void 

  1156. merge_memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1157. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1158. {

  1159. 	while (src_bytes) {

  1160. 		int acc = (*(int *)dst & 0xFFFFFF) + (*(int *)src & 0xFFFFFF);

  1161. 		memcpy(dst, &acc, 3);

  1162. 		dst += dst_skip_bytes;

  1163. 		src += src_skip_bytes;

  1164. 		src_bytes -= 3;

  1165. 	}

  1166. }

  1167. 

  1168. void 

  1169. memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1170. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1171. {

  1172. 	while (src_bytes) {

  1173. 		*((short *) dst) = *((short *) src);

  1174. 		dst += dst_skip_bytes;

  1175. 		src += src_skip_bytes;

  1176. 		src_bytes -= 2;

  1177. 	}

  1178. }

  1179. 

  1180. void 

  1181. memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1182. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1183. 

  1184. {

  1185. 	while (src_bytes) {

  1186. 		memcpy(dst, src, 3);

  1187. 		dst += dst_skip_bytes;

  1188. 		src += src_skip_bytes;

  1189. 		src_bytes -= 3;

  1190. 	}

  1191. }

  1192. 

  1193. void 

  1194. memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1195. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1196. 

  1197. {

  1198. 	while (src_bytes) {

  1199. 		*((int *) dst) = *((int *) src);

  1200. 		dst += dst_skip_bytes;

  1201. 		src += src_skip_bytes;

  1202. 		src_bytes -= 4;

  1203. 	}

  1204. }