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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. 

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

  55. 

  56. 

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

  58.        while (nsamples--) {

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

  60.                dst++;

  61.                src += src_skip;

  62.        }

  63. }

  64. 

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

  66.        while (nsamples--) {

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

  68.                dst += dst_skip;

  69.                src++;

  70.        }

  71. }

  72. 

  73. 

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

  75. 

  76. 

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

  78. 

  79. {

  80.         long long y;

  81. 	int z;

  82. 

  83. 	while (nsamples--) {

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

  85. 		if (y > INT_MAX) {

  86. 			z = INT_MAX;

  87. 		} else if (y < INT_MIN) {

  88. 			z = INT_MIN;

  89. 		} else {

  90. 			z = (int)y;

  91. 		}

  92. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  97. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  102. #endif

  103. 		dst += dst_skip;

  104. 		src++;

  105. 	}

  106. }	

  107. 

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

  109. 

  110. {

  111.         long long y;

  112. 

  113. 	while (nsamples--) {

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

  115. 		if (y > INT_MAX) {

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

  117. 		} else if (y < INT_MIN) {

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

  119. 		} else {

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

  121. 		}

  122. 		dst += dst_skip;

  123. 		src++;

  124. 	}

  125. }	

  126. 

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

  128. {

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

  130. 

  131. 	while (nsamples--) {

  132. 		int x;

  133. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  135. 		x <<= 8;

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

  137. 		x <<= 8;

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

  139. 		x <<= 8;

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

  141. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  143. 		x <<= 8;

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

  145. 		x <<= 8;

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

  147. 		x <<= 8;

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

  149. #endif

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

  151. 		dst++;

  152. 		src += src_skip;

  153. 	}

  154. }	

  155. 

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

  157. {

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

  159. 

  160. 	while (nsamples--) {

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

  162. 		dst++;

  163. 		src += src_skip;

  164. 	}

  165. }	

  166. 

  167. 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)

  168. 

  169. {

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

  171. 	jack_default_audio_sample_t  x;

  172. 	long long y;

  173. 	int z;

  174. 

  175. 	while (nsamples--) {

  176. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  179. 		y <<= 16;

  180. 		if (y > INT_MAX) {

  181. 			z = INT_MAX;

  182. 		} else if (y < INT_MIN) {

  183. 			z = INT_MIN;

  184. 		} else {

  185. 			z = (int)y;

  186. 		}

  187. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  192. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  197. #endif

  198. 		dst += dst_skip;

  199. 		src++;

  200. 	}

  201. }	

  202. 

  203. 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)

  204. 

  205. {

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

  207. 	jack_default_audio_sample_t  x;

  208. 	long long y;

  209. 

  210. 	while (nsamples--) {

  211. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  214. 		y <<= 16;

  215. 		if (y > INT_MAX) {

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

  217. 		} else if (y < INT_MIN) {

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

  219. 		} else {

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

  221. 		}

  222. 		dst += dst_skip;

  223. 		src++;

  224. 	}

  225. }	

  226. 

  227. 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)

  228. 	

  229. {

  230. 	jack_default_audio_sample_t  x;

  231. 	float     r;

  232. 	float     rm1 = state->rm1;

  233. 	long long y;

  234. 	int z;

  235. 

  236. 	while (nsamples--) {

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

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

  239. 		x += r - rm1;

  240. 		rm1 = r;

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

  242. 		y <<= 16;

  243. 

  244. 		if (y > INT_MAX) {

  245. 			z = INT_MAX;

  246. 		} else if (y < INT_MIN) {

  247. 			z = INT_MIN;

  248. 		} else {

  249. 			z = (int)y;

  250. 		}

  251. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  256. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  261. #endif

  262. 		dst += dst_skip;

  263. 		src++;

  264. 	}

  265. 	state->rm1 = rm1;

  266. }

  267. 

  268. 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)

  269. 	

  270. {

  271. 	jack_default_audio_sample_t  x;

  272. 	float     r;

  273. 	float     rm1 = state->rm1;

  274. 	long long y;

  275. 

  276. 	while (nsamples--) {

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

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

  279. 		x += r - rm1;

  280. 		rm1 = r;

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

  282. 		y <<= 16;

  283. 

  284. 		if (y > INT_MAX) {

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

  286. 		} else if (y < INT_MIN) {

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

  288. 		} else {

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

  290. 		}

  291. 

  292. 		dst += dst_skip;

  293. 		src++;

  294. 	}

  295. 	state->rm1 = rm1;

  296. }

  297. 

  298. 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)

  299. 	

  300. {

  301. 	jack_default_audio_sample_t     x;

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

  303. 	jack_default_audio_sample_t     xp; /* x' */

  304. 	float        r;

  305. 	float        rm1 = state->rm1;

  306. 	unsigned int idx = state->idx;

  307. 	long long    y;

  308. 	int z;

  309. 

  310. 	while (nsamples--) {

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

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

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

  314. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  315. 		xe = x

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

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

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

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

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

  321. 		xp = xe + r - rm1;

  322. 		rm1 = r;

  323. 

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

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

  326. 

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

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

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

  330. 

  331. 		y <<= 16;

  332. 

  333. 		if (y > INT_MAX) {

  334. 			z = INT_MAX;

  335. 		} else if (y < INT_MIN) {

  336. 			z = INT_MIN;

  337. 		} else {

  338. 			z = (int)y;

  339. 		}

  340. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  345. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  350. #endif

  351. 		dst += dst_skip;

  352. 		src++;

  353. 	}

  354. 	state->rm1 = rm1;

  355. 	state->idx = idx;

  356. }

  357. 

  358. 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)

  359. 	

  360. {

  361. 	jack_default_audio_sample_t     x;

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

  363. 	jack_default_audio_sample_t     xp; /* x' */

  364. 	float        r;

  365. 	float        rm1 = state->rm1;

  366. 	unsigned int idx = state->idx;

  367. 	long long    y;

  368. 

  369. 	while (nsamples--) {

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

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

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

  373. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  374. 		xe = x

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

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

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

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

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

  380. 		xp = xe + r - rm1;

  381. 		rm1 = r;

  382. 

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

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

  385. 

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

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

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

  389. 

  390. 		y <<= 16;

  391. 

  392. 		if (y > INT_MAX) {

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

  394. 		} else if (y < INT_MIN) {

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

  396. 		} else {

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

  398. 		}

  399. 		dst += dst_skip;

  400. 		src++;

  401. 	}

  402. 	state->rm1 = rm1;

  403. 	state->idx = idx;

  404. }

  405. 

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

  407. 

  408. {

  409.         long long y;

  410. 	int z;

  411. 

  412. 	while (nsamples--) {

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

  414. 

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

  416. 			z = (INT_MAX >> 8);

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

  418. 			z = (INT_MIN >> 8 );

  419. 		} else {

  420. 			z = (int)y;

  421. 		}

  422. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  426. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  430. #endif

  431. 		dst += dst_skip;

  432. 		src++;

  433. 	}

  434. }	

  435. 

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

  437. 

  438. {

  439.         long long y;

  440. 

  441. 	while (nsamples--) {

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

  443. 

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

  445. 			y = (INT_MAX >> 8);

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

  447. 			y = (INT_MIN >> 8 );

  448. 		}

  449. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  451. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  453. #endif

  454. 		dst += dst_skip;

  455. 		src++;

  456. 	}

  457. }	

  458. 

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

  460. {

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

  462. 

  463. 	while (nsamples--) {

  464. 		int x;

  465. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  467. 		x <<= 8;

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

  469. 		x <<= 8;

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

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

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

  473. 			x |= 0xff << 24;

  474. 		}

  475. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  477. 		x <<= 8;

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

  479. 		x <<= 8;

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

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

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

  483. 			x |= 0xff << 24;

  484. 		}

  485. #endif

  486. 		*dst = x / SAMPLE_MAX_24BIT;

  487. 		dst++;

  488. 		src += src_skip;

  489. 	}

  490. }	

  491. 

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

  493. {

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

  495. 

  496. 	while (nsamples--) {

  497. 		int x;

  498. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  500. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  502. #endif

  503. 		x >>= 8;

  504. 		*dst = x / SAMPLE_MAX_24BIT;

  505. 		dst++;

  506. 		src += src_skip;

  507. 	}

  508. }	

  509. 

  510. 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)

  511. 

  512. {

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

  514. 	jack_default_audio_sample_t  x;

  515. 	long long y;

  516. 	int z;

  517. 

  518. 	while (nsamples--) {

  519. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  522. 

  523. 		y <<= 8;

  524. 

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

  526. 			z = (INT_MAX >> 8);

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

  528. 			z = (INT_MIN >> 8);

  529. 		} else {

  530. 			z = (int)y;

  531. 		}

  532. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  536. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  540. #endif

  541. 		dst += dst_skip;

  542. 		src++;

  543. 	}

  544. }	

  545. 

  546. 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)

  547. 

  548. {

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

  550. 	jack_default_audio_sample_t  x;

  551. 	long long y;

  552. 

  553. 	while (nsamples--) {

  554. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  557. 

  558. 		y <<= 8;

  559. 

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

  561. 			y = (INT_MAX >> 8);

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

  563. 			y = (INT_MIN >> 8);

  564. 		}

  565. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  567. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  569. #endif

  570. 

  571. 		dst += dst_skip;

  572. 		src++;

  573. 	}

  574. }	

  575. 

  576. 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)

  577. 	

  578. {

  579. 	jack_default_audio_sample_t  x;

  580. 	float     r;

  581. 	float     rm1 = state->rm1;

  582. 	long long y;

  583. 	int z;

  584. 

  585. 	while (nsamples--) {

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

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

  588. 		x += r - rm1;

  589. 		rm1 = r;

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

  591. 

  592. 		y <<= 8;

  593. 

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

  595. 			z = (INT_MAX >> 8);

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

  597. 			z = (INT_MIN >> 8);

  598. 		} else {

  599. 			z = (int)y;

  600. 		}

  601. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  605. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  609. #endif

  610. 		dst += dst_skip;

  611. 		src++;

  612. 	}

  613. 	state->rm1 = rm1;

  614. }

  615. 

  616. 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)

  617. 	

  618. {

  619. 	jack_default_audio_sample_t  x;

  620. 	float     r;

  621. 	float     rm1 = state->rm1;

  622. 	long long y;

  623. 

  624. 	while (nsamples--) {

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

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

  627. 		x += r - rm1;

  628. 		rm1 = r;

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

  630. 

  631. 		y <<= 8;

  632. 

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

  634. 			y = (INT_MAX >> 8);

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

  636. 			y = (INT_MIN >> 8);

  637. 		}

  638. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  640. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  642. #endif

  643. 

  644. 		dst += dst_skip;

  645. 		src++;

  646. 	}

  647. 	state->rm1 = rm1;

  648. }

  649. 

  650. 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)

  651. 	

  652. {

  653. 	jack_default_audio_sample_t     x;

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

  655. 	jack_default_audio_sample_t     xp; /* x' */

  656. 	float        r;

  657. 	float        rm1 = state->rm1;

  658. 	unsigned int idx = state->idx;

  659. 	long long    y;

  660. 	int z;

  661. 

  662. 	while (nsamples--) {

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

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

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

  666. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  667. 		xe = x

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

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

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

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

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

  673. 		xp = xe + r - rm1;

  674. 		rm1 = r;

  675. 

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

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

  678. 

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

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

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

  682. 

  683. 		y <<= 8;

  684. 

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

  686. 			z = (INT_MAX >> 8);

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

  688. 			z = (INT_MIN >> 8);

  689. 		} else {

  690. 			z = (int)y;

  691. 		}

  692. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  696. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  700. #endif

  701. 		dst += dst_skip;

  702. 		src++;

  703. 	}

  704. 	state->rm1 = rm1;

  705. 	state->idx = idx;

  706. }

  707. 

  708. 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)

  709. 	

  710. {

  711. 	jack_default_audio_sample_t     x;

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

  713. 	jack_default_audio_sample_t     xp; /* x' */

  714. 	float        r;

  715. 	float        rm1 = state->rm1;

  716. 	unsigned int idx = state->idx;

  717. 	long long    y;

  718. 

  719. 	while (nsamples--) {

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

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

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

  723. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  724. 		xe = x

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

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

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

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

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

  730. 		xp = xe + r - rm1;

  731. 		rm1 = r;

  732. 

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

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

  735. 

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

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

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

  739. 

  740. 		y <<= 8;

  741. 

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

  743. 			y = (INT_MAX >> 8);

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

  745. 			y = (INT_MIN >> 8);

  746. 		}

  747. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  749. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  751. #endif

  752. 

  753. 		dst += dst_skip;

  754. 		src++;

  755. 	}

  756. 	state->rm1 = rm1;

  757. 	state->idx = idx;

  758. }

  759. 

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

  761. 	

  762. {

  763. 	int tmp;

  764. 

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

  766. 

  767. 	while (nsamples--) {

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

  769. 		if (tmp > SHRT_MAX) {

  770. 			tmp = SHRT_MAX;

  771. 		} else if (tmp < SHRT_MIN) {

  772. 			tmp = SHRT_MIN;

  773. 		}

  774. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  777. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  780. #endif

  781. 		dst += dst_skip;

  782. 		src++;

  783. 	}

  784. }

  785. 

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

  787. 	

  788. {

  789. 	int tmp;

  790. 

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

  792. 

  793. 	while (nsamples--) {

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

  795. 		if (tmp > SHRT_MAX) {

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

  797. 		} else if (tmp < SHRT_MIN) {

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

  799. 		} else {

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

  801. 		}

  802. 		dst += dst_skip;

  803. 		src++;

  804. 	}

  805. }

  806. 

  807. 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)

  808. 	

  809. {

  810. 	jack_default_audio_sample_t val;

  811. 	int      tmp;

  812. 

  813. 	while (nsamples--) {

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

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

  816. 		tmp = f_round(val);

  817. 		if (tmp > SHRT_MAX) {

  818. 			tmp = SHRT_MAX;

  819. 		} else if (tmp < SHRT_MIN) {

  820. 			tmp = SHRT_MIN;

  821. 		}

  822. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  825. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  828. #endif

  829. 		dst += dst_skip;

  830. 		src++;

  831. 	}

  832. }

  833. 

  834. 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)

  835. 	

  836. {

  837. 	jack_default_audio_sample_t val;

  838. 	int      tmp;

  839. 

  840. 	while (nsamples--) {

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

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

  843. 		tmp = f_round(val);

  844. 		if (tmp > SHRT_MAX) {

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

  846. 		} else if (tmp < SHRT_MIN) {

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

  848. 		} else {

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

  850. 		}

  851. 		dst += dst_skip;

  852. 		src++;

  853. 	}

  854. }

  855. 

  856. 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)

  857. 	

  858. {

  859. 	jack_default_audio_sample_t x;

  860. 	float    r;

  861. 	float    rm1 = state->rm1;

  862. 	int      y;

  863. 

  864. 	while (nsamples--) {

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

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

  867. 		x += r - rm1;

  868. 		rm1 = r;

  869. 		y = f_round(x);

  870. 

  871. 		if (y > SHRT_MAX) {

  872. 			y = SHRT_MAX;

  873. 		} else if (y < SHRT_MIN) {

  874. 			y = SHRT_MIN;

  875. 		}

  876. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  879. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  882. #endif

  883. 		dst += dst_skip;

  884. 		src++;

  885. 	}

  886. 	state->rm1 = rm1;

  887. }

  888. 

  889. 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)

  890. 	

  891. {

  892. 	jack_default_audio_sample_t x;

  893. 	float    r;

  894. 	float    rm1 = state->rm1;

  895. 	int      y;

  896. 

  897. 	while (nsamples--) {

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

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

  900. 		x += r - rm1;

  901. 		rm1 = r;

  902. 		y = f_round(x);

  903. 

  904. 		if (y > SHRT_MAX) {

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

  906. 		} else if (y < SHRT_MIN) {

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

  908. 		} else {

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

  910. 		}

  911. 

  912. 		dst += dst_skip;

  913. 		src++;

  914. 	}

  915. 	state->rm1 = rm1;

  916. }

  917. 

  918. 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)

  919. 	

  920. {

  921. 	jack_default_audio_sample_t     x;

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

  923. 	jack_default_audio_sample_t     xp; /* x' */

  924. 	float        r;

  925. 	float        rm1 = state->rm1;

  926. 	unsigned int idx = state->idx;

  927. 	int          y;

  928. 

  929. 	while (nsamples--) {

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

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

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

  933. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  934. 		xe = x

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

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

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

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

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

  940. 		xp = xe + r - rm1;

  941. 		rm1 = r;

  942. 

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

  944. 		y = f_round(xp);

  945. 

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

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

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

  949. 

  950. 		if (y > SHRT_MAX) {

  951. 			y = SHRT_MAX;

  952. 		} else if (y < SHRT_MIN) {

  953. 			y = SHRT_MIN;

  954. 		}

  955. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  958. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  961. #endif

  962. 		dst += dst_skip;

  963. 		src++;

  964. 	}

  965. 	state->rm1 = rm1;

  966. 	state->idx = idx;

  967. }

  968. 

  969. 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)

  970. 	

  971. {

  972. 	jack_default_audio_sample_t     x;

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

  974. 	jack_default_audio_sample_t     xp; /* x' */

  975. 	float        r;

  976. 	float        rm1 = state->rm1;

  977. 	unsigned int idx = state->idx;

  978. 	int          y;

  979. 

  980. 	while (nsamples--) {

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

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

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

  984. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  985. 		xe = x

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

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

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

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

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

  991. 		xp = xe + r - rm1;

  992. 		rm1 = r;

  993. 

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

  995. 		y = f_round(xp);

  996. 

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

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

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

  1000. 

  1001. 		if (y > SHRT_MAX) {

  1002. 			*((short *)dst) = SHRT_MAX;

  1003. 		} else if (y < SHRT_MIN) {

  1004. 			*((short *)dst) = SHRT_MIN;

  1005. 		} else {

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

  1007. 		}

  1008. 		dst += dst_skip;

  1009. 		src++;

  1010. 	}

  1011. 	state->rm1 = rm1;

  1012. 	state->idx = idx;

  1013. }

  1014. 

  1015. void sample_move_dS_s16s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 

  1016. 	

  1017. {

  1018. 	short z;

  1019. 

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

  1021. 	while (nsamples--) {

  1022. #if __BYTE_ORDER == __LITTLE_ENDIAN

  1023. 		z = (unsigned char)(src[0]);

  1024. 		z <<= 8;

  1025. 		z |= (unsigned char)(src[1]);

  1026. #elif __BYTE_ORDER == __BIG_ENDIAN

  1027. 		z = (unsigned char)(src[1]);

  1028. 		z <<= 8;

  1029. 		z |= (unsigned char)(src[0]);

  1030. #endif

  1031. 		*dst = z / SAMPLE_MAX_16BIT;

  1032. 		dst++;

  1033. 		src += src_skip;

  1034. 	}

  1035. }	

  1036. 

  1037. void sample_move_dS_s16 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 

  1038. 	

  1039. {

  1040. 	/* ALERT: signed sign-extension portability !!! */

  1041. 	while (nsamples--) {

  1042. 		*dst = (*((short *) src)) / SAMPLE_MAX_16BIT;

  1043. 		dst++;

  1044. 		src += src_skip;

  1045. 	}

  1046. }	

  1047. 

  1048. void sample_merge_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1049. {

  1050. 	short val;

  1051. 

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

  1053. 	

  1054. 	while (nsamples--) {

  1055. 		val = (short) (*src * SAMPLE_MAX_16BIT);

  1056. 		

  1057. 		if (val > SHRT_MAX - *((short *) dst)) {

  1058. 			*((short *)dst) = SHRT_MAX;

  1059. 		} else if (val < SHRT_MIN - *((short *) dst)) {

  1060. 			*((short *)dst) = SHRT_MIN;

  1061. 		} else {

  1062. 			*((short *) dst) += val;

  1063. 		}

  1064. 		dst += dst_skip;

  1065. 		src++;

  1066. 	}

  1067. }	

  1068. 

  1069. void sample_merge_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1070. 

  1071. {

  1072. 	/* ALERT: signed sign-extension portability !!! */

  1073. 

  1074. 	while (nsamples--) {

  1075. 		*((int *) dst) += (((int) (*src * SAMPLE_MAX_24BIT)) << 8);

  1076. 		dst += dst_skip;

  1077. 		src++;

  1078. 	}

  1079. }	

  1080. 

  1081. void memset_interleave (char *dst, char val, unsigned long bytes, 

  1082. 			unsigned long unit_bytes, 

  1083. 			unsigned long skip_bytes) 

  1084. {

  1085. 	switch (unit_bytes) {

  1086. 	case 1:

  1087. 		while (bytes--) {

  1088. 			*dst = val;

  1089. 			dst += skip_bytes;

  1090. 		}

  1091. 		break;

  1092. 	case 2:

  1093. 		while (bytes) {

  1094. 			*((short *) dst) = (short) val;

  1095. 			dst += skip_bytes;

  1096. 			bytes -= 2;

  1097. 		}

  1098. 		break;

  1099. 	case 4:		    

  1100. 		while (bytes) {

  1101. 			*((int *) dst) = (int) val;

  1102. 			dst += skip_bytes;

  1103. 			bytes -= 4;

  1104. 		}

  1105. 		break;

  1106. 	default:

  1107. 		while (bytes) {

  1108. 			memset(dst, val, unit_bytes);

  1109. 			dst += skip_bytes;

  1110. 			bytes -= unit_bytes;

  1111. 		}

  1112. 		break;

  1113. 	}

  1114. }

  1115. 

  1116. /* COPY FUNCTIONS: used to move data from an input channel to an

  1117.    output channel. Note that we assume that the skip distance

  1118.    is the same for both channels. This is completely fine

  1119.    unless the input and output were on different audio interfaces that

  1120.    were interleaved differently. We don't try to handle that.

  1121. */

  1122. 

  1123. void 

  1124. memcpy_fake (char *dst, char *src, unsigned long src_bytes, unsigned long foo, unsigned long bar)

  1125. {

  1126. 	memcpy (dst, src, src_bytes);

  1127. }

  1128. 

  1129. void 

  1130. merge_memcpy_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1131. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1132. {

  1133. 	while (src_bytes) {

  1134. 		*((short *) dst) += *((short *) src);

  1135. 		dst += 2;

  1136. 		src += 2;

  1137. 		src_bytes -= 2;

  1138. 	}

  1139. }

  1140. 

  1141. void 

  1142. merge_memcpy_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1143. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1144. 

  1145. {

  1146. 	while (src_bytes) {

  1147. 		*((int *) dst) += *((int *) src);

  1148. 		dst += 4;

  1149. 		src += 4;

  1150. 		src_bytes -= 4;

  1151. 	}

  1152. }

  1153. 

  1154. void 

  1155. merge_memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes, 

  1156. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1157. 

  1158. {

  1159. 	while (src_bytes) {

  1160. 		*((short *) dst) += *((short *) src);

  1161. 		dst += dst_skip_bytes;

  1162. 		src += src_skip_bytes;

  1163. 		src_bytes -= 2;

  1164. 	}

  1165. }

  1166. 

  1167. void 

  1168. merge_memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1169. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1170. {

  1171. 	while (src_bytes) {

  1172. 		*((int *) dst) += *((int *) src);

  1173. 		dst += dst_skip_bytes;

  1174. 		src += src_skip_bytes;

  1175. 		src_bytes -= 4;

  1176. 	}

  1177. }

  1178. 

  1179. void 

  1180. merge_memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1181. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1182. {

  1183. 	while (src_bytes) {

  1184. 		int acc = (*(int *)dst & 0xFFFFFF) + (*(int *)src & 0xFFFFFF);

  1185. 		memcpy(dst, &acc, 3);

  1186. 		dst += dst_skip_bytes;

  1187. 		src += src_skip_bytes;

  1188. 		src_bytes -= 3;

  1189. 	}

  1190. }

  1191. 

  1192. void 

  1193. memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1194. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1195. {

  1196. 	while (src_bytes) {

  1197. 		*((short *) dst) = *((short *) src);

  1198. 		dst += dst_skip_bytes;

  1199. 		src += src_skip_bytes;

  1200. 		src_bytes -= 2;

  1201. 	}

  1202. }

  1203. 

  1204. void 

  1205. memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1206. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1207. 

  1208. {

  1209. 	while (src_bytes) {

  1210. 		memcpy(dst, src, 3);

  1211. 		dst += dst_skip_bytes;

  1212. 		src += src_skip_bytes;

  1213. 		src_bytes -= 3;

  1214. 	}

  1215. }

  1216. 

  1217. void 

  1218. memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1219. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1220. 

  1221. {

  1222. 	while (src_bytes) {

  1223. 		*((int *) dst) = *((int *) src);

  1224. 		dst += dst_skip_bytes;

  1225. 		src += src_skip_bytes;

  1226. 		src_bytes -= 4;

  1227. 	}

  1228. }