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jack1/drivers/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. */

  19. 

  20. #define _ISOC9X_SOURCE  1

  21. #define _ISOC99_SOURCE  1

  22. 

  23. #define __USE_ISOC9X    1

  24. #define __USE_ISOC99    1

  25. 

  26. #include <stdio.h>

  27. #include <string.h>

  28. #include <math.h>

  29. #include <memory.h>

  30. #include <stdlib.h>

  31. #include <limits.h>

  32. #include <endian.h>

  33. 

  34. #include <jack/memops.h>

  35. 

  36. #define SAMPLE_MAX_24BIT  8388608.0f

  37. #define SAMPLE_MAX_16BIT  32768.0f

  38. 

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

  40. 

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

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

  43. inline unsigned int fast_rand();

  44. 

  45. inline unsigned int fast_rand() {

  46. 	static unsigned int seed = 22222;

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

  48. 

  49. 	return seed;

  50. }

  51. 

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

  53. 

  54. {

  55.         long long y;

  56. 	int z;

  57. 

  58. 	while (nsamples--) {

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

  60. 		if (y > INT_MAX) {

  61. 			z = INT_MAX;

  62. 		} else if (y < INT_MIN) {

  63. 			z = INT_MIN;

  64. 		} else {

  65. 			z = (int)y;

  66. 		}

  67. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  72. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  77. #endif

  78. 		dst += dst_skip;

  79. 		src++;

  80. 	}

  81. }	

  82. 

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

  84. 

  85. {

  86.         long long y;

  87. 

  88. 	while (nsamples--) {

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

  90. 		if (y > INT_MAX) {

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

  92. 		} else if (y < INT_MIN) {

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

  94. 		} else {

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

  96. 		}

  97. 		dst += dst_skip;

  98. 		src++;

  99. 	}

  100. }	

  101. 

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

  103. {

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

  105. 

  106. 	while (nsamples--) {

  107. 		int x;

  108. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  110. 		x <<= 8;

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

  112. 		x <<= 8;

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

  114. 		x <<= 8;

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

  116. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  118. 		x <<= 8;

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

  120. 		x <<= 8;

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

  122. 		x <<= 8;

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

  124. #endif

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

  126. 		dst++;

  127. 		src += src_skip;

  128. 	}

  129. }	

  130. 

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

  132. {

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

  134. 

  135. 	while (nsamples--) {

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

  137. 		dst++;

  138. 		src += src_skip;

  139. 	}

  140. }	

  141. 

  142. 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)

  143. 

  144. {

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

  146. 	jack_default_audio_sample_t  x;

  147. 	long long y;

  148. 	int z;

  149. 

  150. 	while (nsamples--) {

  151. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  154. 		y <<= 16;

  155. 		if (y > INT_MAX) {

  156. 			z = INT_MAX;

  157. 		} else if (y < INT_MIN) {

  158. 			z = INT_MIN;

  159. 		} else {

  160. 			z = (int)y;

  161. 		}

  162. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  167. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  172. #endif

  173. 		dst += dst_skip;

  174. 		src++;

  175. 	}

  176. }	

  177. 

  178. 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)

  179. 

  180. {

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

  182. 	jack_default_audio_sample_t  x;

  183. 	long long y;

  184. 

  185. 	while (nsamples--) {

  186. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  189. 		y <<= 16;

  190. 		if (y > INT_MAX) {

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

  192. 		} else if (y < INT_MIN) {

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

  194. 		} else {

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

  196. 		}

  197. 		dst += dst_skip;

  198. 		src++;

  199. 	}

  200. }	

  201. 

  202. 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)

  203. 	

  204. {

  205. 	jack_default_audio_sample_t  x;

  206. 	float     r;

  207. 	float     rm1 = state->rm1;

  208. 	long long y;

  209. 	int z;

  210. 

  211. 	while (nsamples--) {

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

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

  214. 		x += r - rm1;

  215. 		rm1 = r;

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

  217. 		y <<= 16;

  218. 

  219. 		if (y > INT_MAX) {

  220. 			z = INT_MAX;

  221. 		} else if (y < INT_MIN) {

  222. 			z = INT_MIN;

  223. 		} else {

  224. 			z = (int)y;

  225. 		}

  226. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  231. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  236. #endif

  237. 		dst += dst_skip;

  238. 		src++;

  239. 	}

  240. 	state->rm1 = rm1;

  241. }

  242. 

  243. 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)

  244. 	

  245. {

  246. 	jack_default_audio_sample_t  x;

  247. 	float     r;

  248. 	float     rm1 = state->rm1;

  249. 	long long y;

  250. 

  251. 	while (nsamples--) {

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

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

  254. 		x += r - rm1;

  255. 		rm1 = r;

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

  257. 		y <<= 16;

  258. 

  259. 		if (y > INT_MAX) {

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

  261. 		} else if (y < INT_MIN) {

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

  263. 		} else {

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

  265. 		}

  266. 

  267. 		dst += dst_skip;

  268. 		src++;

  269. 	}

  270. 	state->rm1 = rm1;

  271. }

  272. 

  273. 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)

  274. 	

  275. {

  276. 	jack_default_audio_sample_t     x;

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

  278. 	jack_default_audio_sample_t     xp; /* x' */

  279. 	float        r;

  280. 	float        rm1 = state->rm1;

  281. 	unsigned int idx = state->idx;

  282. 	long long    y;

  283. 	int z;

  284. 

  285. 	while (nsamples--) {

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

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

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

  289. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  290. 		xe = x

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

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

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

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

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

  296. 		xp = xe + r - rm1;

  297. 		rm1 = r;

  298. 

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

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

  301. 

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

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

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

  305. 

  306. 		y <<= 16;

  307. 

  308. 		if (y > INT_MAX) {

  309. 			z = INT_MAX;

  310. 		} else if (y < INT_MIN) {

  311. 			z = INT_MIN;

  312. 		} else {

  313. 			z = (int)y;

  314. 		}

  315. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  320. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  325. #endif

  326. 		dst += dst_skip;

  327. 		src++;

  328. 	}

  329. 	state->rm1 = rm1;

  330. 	state->idx = idx;

  331. }

  332. 

  333. 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)

  334. 	

  335. {

  336. 	jack_default_audio_sample_t     x;

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

  338. 	jack_default_audio_sample_t     xp; /* x' */

  339. 	float        r;

  340. 	float        rm1 = state->rm1;

  341. 	unsigned int idx = state->idx;

  342. 	long long    y;

  343. 

  344. 	while (nsamples--) {

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

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

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

  348. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  349. 		xe = x

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

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

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

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

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

  355. 		xp = xe + r - rm1;

  356. 		rm1 = r;

  357. 

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

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

  360. 

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

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

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

  364. 

  365. 		y <<= 16;

  366. 

  367. 		if (y > INT_MAX) {

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

  369. 		} else if (y < INT_MIN) {

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

  371. 		} else {

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

  373. 		}

  374. 		dst += dst_skip;

  375. 		src++;

  376. 	}

  377. 	state->rm1 = rm1;

  378. 	state->idx = idx;

  379. }

  380. 

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

  382. 

  383. {

  384.         long long y;

  385. 	int z;

  386. 

  387. 	while (nsamples--) {

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

  389. 

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

  391. 			z = (INT_MAX >> 8);

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

  393. 			z = (INT_MIN >> 8 );

  394. 		} else {

  395. 			z = (int)y;

  396. 		}

  397. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  401. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  405. #endif

  406. 		dst += dst_skip;

  407. 		src++;

  408. 	}

  409. }	

  410. 

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

  412. 

  413. {

  414.         long long y;

  415. 

  416. 	while (nsamples--) {

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

  418. 

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

  420. 			y = (INT_MAX >> 8);

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

  422. 			y = (INT_MIN >> 8 );

  423. 		}

  424. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  426. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  428. #endif

  429. 		dst += dst_skip;

  430. 		src++;

  431. 	}

  432. }	

  433. 

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

  435. {

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

  437. 

  438. 	while (nsamples--) {

  439. 		int x;

  440. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  442. 		x <<= 8;

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

  444. 		x <<= 8;

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

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

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

  448. 			x |= 0xff << 24;

  449. 		}

  450. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  452. 		x <<= 8;

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

  454. 		x <<= 8;

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

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

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

  458. 			x |= 0xff << 24;

  459. 		}

  460. #endif

  461. 		*dst = x / SAMPLE_MAX_24BIT;

  462. 		dst++;

  463. 		src += src_skip;

  464. 	}

  465. }	

  466. 

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

  468. {

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

  470. 

  471. 	while (nsamples--) {

  472. 		int x;

  473. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  475. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  477. #endif

  478. 		x >>= 8;

  479. 		*dst = x / SAMPLE_MAX_24BIT;

  480. 		dst++;

  481. 		src += src_skip;

  482. 	}

  483. }	

  484. 

  485. 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)

  486. 

  487. {

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

  489. 	jack_default_audio_sample_t  x;

  490. 	long long y;

  491. 	int z;

  492. 

  493. 	while (nsamples--) {

  494. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  497. 

  498. 		y <<= 8;

  499. 

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

  501. 			z = (INT_MAX >> 8);

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

  503. 			z = (INT_MIN >> 8);

  504. 		} else {

  505. 			z = (int)y;

  506. 		}

  507. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  511. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  515. #endif

  516. 		dst += dst_skip;

  517. 		src++;

  518. 	}

  519. }	

  520. 

  521. 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)

  522. 

  523. {

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

  525. 	jack_default_audio_sample_t  x;

  526. 	long long y;

  527. 

  528. 	while (nsamples--) {

  529. 		x = *src * SAMPLE_MAX_16BIT;

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

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

  532. 

  533. 		y <<= 8;

  534. 

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

  536. 			y = (INT_MAX >> 8);

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

  538. 			y = (INT_MIN >> 8);

  539. 		}

  540. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  542. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  544. #endif

  545. 

  546. 		dst += dst_skip;

  547. 		src++;

  548. 	}

  549. }	

  550. 

  551. 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)

  552. 	

  553. {

  554. 	jack_default_audio_sample_t  x;

  555. 	float     r;

  556. 	float     rm1 = state->rm1;

  557. 	long long y;

  558. 	int z;

  559. 

  560. 	while (nsamples--) {

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

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

  563. 		x += r - rm1;

  564. 		rm1 = r;

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

  566. 

  567. 		y <<= 8;

  568. 

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

  570. 			z = (INT_MAX >> 8);

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

  572. 			z = (INT_MIN >> 8);

  573. 		} else {

  574. 			z = (int)y;

  575. 		}

  576. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  580. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  584. #endif

  585. 		dst += dst_skip;

  586. 		src++;

  587. 	}

  588. 	state->rm1 = rm1;

  589. }

  590. 

  591. 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)

  592. 	

  593. {

  594. 	jack_default_audio_sample_t  x;

  595. 	float     r;

  596. 	float     rm1 = state->rm1;

  597. 	long long y;

  598. 

  599. 	while (nsamples--) {

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

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

  602. 		x += r - rm1;

  603. 		rm1 = r;

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

  605. 

  606. 		y <<= 8;

  607. 

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

  609. 			y = (INT_MAX >> 8);

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

  611. 			y = (INT_MIN >> 8);

  612. 		}

  613. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  615. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  617. #endif

  618. 

  619. 		dst += dst_skip;

  620. 		src++;

  621. 	}

  622. 	state->rm1 = rm1;

  623. }

  624. 

  625. 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)

  626. 	

  627. {

  628. 	jack_default_audio_sample_t     x;

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

  630. 	jack_default_audio_sample_t     xp; /* x' */

  631. 	float        r;

  632. 	float        rm1 = state->rm1;

  633. 	unsigned int idx = state->idx;

  634. 	long long    y;

  635. 	int z;

  636. 

  637. 	while (nsamples--) {

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

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

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

  641. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  642. 		xe = x

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

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

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

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

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

  648. 		xp = xe + r - rm1;

  649. 		rm1 = r;

  650. 

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

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

  653. 

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

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

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

  657. 

  658. 		y <<= 8;

  659. 

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

  661. 			z = (INT_MAX >> 8);

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

  663. 			z = (INT_MIN >> 8);

  664. 		} else {

  665. 			z = (int)y;

  666. 		}

  667. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  671. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  675. #endif

  676. 		dst += dst_skip;

  677. 		src++;

  678. 	}

  679. 	state->rm1 = rm1;

  680. 	state->idx = idx;

  681. }

  682. 

  683. 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)

  684. 	

  685. {

  686. 	jack_default_audio_sample_t     x;

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

  688. 	jack_default_audio_sample_t     xp; /* x' */

  689. 	float        r;

  690. 	float        rm1 = state->rm1;

  691. 	unsigned int idx = state->idx;

  692. 	long long    y;

  693. 

  694. 	while (nsamples--) {

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

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

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

  698. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  699. 		xe = x

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

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

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

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

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

  705. 		xp = xe + r - rm1;

  706. 		rm1 = r;

  707. 

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

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

  710. 

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

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

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

  714. 

  715. 		y <<= 8;

  716. 

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

  718. 			y = (INT_MAX >> 8);

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

  720. 			y = (INT_MIN >> 8);

  721. 		}

  722. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  724. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  726. #endif

  727. 

  728. 		dst += dst_skip;

  729. 		src++;

  730. 	}

  731. 	state->rm1 = rm1;

  732. 	state->idx = idx;

  733. }

  734. 

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

  736. 	

  737. {

  738. 	int tmp;

  739. 

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

  741. 

  742. 	while (nsamples--) {

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

  744. 		if (tmp > SHRT_MAX) {

  745. 			tmp = SHRT_MAX;

  746. 		} else if (tmp < SHRT_MIN) {

  747. 			tmp = SHRT_MIN;

  748. 		}

  749. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  752. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  755. #endif

  756. 		dst += dst_skip;

  757. 		src++;

  758. 	}

  759. }

  760. 

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

  762. 	

  763. {

  764. 	int tmp;

  765. 

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

  767. 

  768. 	while (nsamples--) {

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

  770. 		if (tmp > SHRT_MAX) {

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

  772. 		} else if (tmp < SHRT_MIN) {

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

  774. 		} else {

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

  776. 		}

  777. 		dst += dst_skip;

  778. 		src++;

  779. 	}

  780. }

  781. 

  782. 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)

  783. 	

  784. {

  785. 	jack_default_audio_sample_t val;

  786. 	int      tmp;

  787. 

  788. 	while (nsamples--) {

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

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

  791. 		tmp = f_round(val);

  792. 		if (tmp > SHRT_MAX) {

  793. 			tmp = SHRT_MAX;

  794. 		} else if (tmp < SHRT_MIN) {

  795. 			tmp = SHRT_MIN;

  796. 		}

  797. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  800. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  803. #endif

  804. 		dst += dst_skip;

  805. 		src++;

  806. 	}

  807. }

  808. 

  809. 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)

  810. 	

  811. {

  812. 	jack_default_audio_sample_t val;

  813. 	int      tmp;

  814. 

  815. 	while (nsamples--) {

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

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

  818. 		tmp = f_round(val);

  819. 		if (tmp > SHRT_MAX) {

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

  821. 		} else if (tmp < SHRT_MIN) {

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

  823. 		} else {

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

  825. 		}

  826. 		dst += dst_skip;

  827. 		src++;

  828. 	}

  829. }

  830. 

  831. 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)

  832. 	

  833. {

  834. 	jack_default_audio_sample_t x;

  835. 	float    r;

  836. 	float    rm1 = state->rm1;

  837. 	int      y;

  838. 

  839. 	while (nsamples--) {

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

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

  842. 		x += r - rm1;

  843. 		rm1 = r;

  844. 		y = f_round(x);

  845. 

  846. 		if (y > SHRT_MAX) {

  847. 			y = SHRT_MAX;

  848. 		} else if (y < SHRT_MIN) {

  849. 			y = SHRT_MIN;

  850. 		}

  851. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  854. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  857. #endif

  858. 		dst += dst_skip;

  859. 		src++;

  860. 	}

  861. 	state->rm1 = rm1;

  862. }

  863. 

  864. 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)

  865. 	

  866. {

  867. 	jack_default_audio_sample_t x;

  868. 	float    r;

  869. 	float    rm1 = state->rm1;

  870. 	int      y;

  871. 

  872. 	while (nsamples--) {

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

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

  875. 		x += r - rm1;

  876. 		rm1 = r;

  877. 		y = f_round(x);

  878. 

  879. 		if (y > SHRT_MAX) {

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

  881. 		} else if (y < SHRT_MIN) {

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

  883. 		} else {

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

  885. 		}

  886. 

  887. 		dst += dst_skip;

  888. 		src++;

  889. 	}

  890. 	state->rm1 = rm1;

  891. }

  892. 

  893. 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)

  894. 	

  895. {

  896. 	jack_default_audio_sample_t     x;

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

  898. 	jack_default_audio_sample_t     xp; /* x' */

  899. 	float        r;

  900. 	float        rm1 = state->rm1;

  901. 	unsigned int idx = state->idx;

  902. 	int          y;

  903. 

  904. 	while (nsamples--) {

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

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

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

  908. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  909. 		xe = x

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

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

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

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

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

  915. 		xp = xe + r - rm1;

  916. 		rm1 = r;

  917. 

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

  919. 		y = f_round(xp);

  920. 

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

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

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

  924. 

  925. 		if (y > SHRT_MAX) {

  926. 			y = SHRT_MAX;

  927. 		} else if (y < SHRT_MIN) {

  928. 			y = SHRT_MIN;

  929. 		}

  930. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  933. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  936. #endif

  937. 		dst += dst_skip;

  938. 		src++;

  939. 	}

  940. 	state->rm1 = rm1;

  941. 	state->idx = idx;

  942. }

  943. 

  944. 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)

  945. 	

  946. {

  947. 	jack_default_audio_sample_t     x;

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

  949. 	jack_default_audio_sample_t     xp; /* x' */

  950. 	float        r;

  951. 	float        rm1 = state->rm1;

  952. 	unsigned int idx = state->idx;

  953. 	int          y;

  954. 

  955. 	while (nsamples--) {

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

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

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

  959. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  960. 		xe = x

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

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

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

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

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

  966. 		xp = xe + r - rm1;

  967. 		rm1 = r;

  968. 

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

  970. 		y = f_round(xp);

  971. 

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

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

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

  975. 

  976. 		if (y > SHRT_MAX) {

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

  978. 		} else if (y < SHRT_MIN) {

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

  980. 		} else {

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

  982. 		}

  983. 		dst += dst_skip;

  984. 		src++;

  985. 	}

  986. 	state->rm1 = rm1;

  987. 	state->idx = idx;

  988. }

  989. 

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

  991. 	

  992. {

  993. 	short z;

  994. 

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

  996. 	while (nsamples--) {

  997. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  999. 		z <<= 8;

  1000. 		z |= (unsigned char)(src[1]);

  1001. #elif __BYTE_ORDER == __BIG_ENDIAN

  1002. 		z = (unsigned char)(src[1]);

  1003. 		z <<= 8;

  1004. 		z |= (unsigned char)(src[0]);

  1005. #endif

  1006. 		*dst = z / SAMPLE_MAX_16BIT;

  1007. 		dst++;

  1008. 		src += src_skip;

  1009. 	}

  1010. }	

  1011. 

  1012. void sample_move_dS_s16 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 

  1013. 	

  1014. {

  1015. 	/* ALERT: signed sign-extension portability !!! */

  1016. 	while (nsamples--) {

  1017. 		*dst = (*((short *) src)) / SAMPLE_MAX_16BIT;

  1018. 		dst++;

  1019. 		src += src_skip;

  1020. 	}

  1021. }	

  1022. 

  1023. void sample_merge_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1024. {

  1025. 	short val;

  1026. 

  1027. 	/* ALERT: signed sign-extension portability !!! */

  1028. 	

  1029. 	while (nsamples--) {

  1030. 		val = (short) (*src * SAMPLE_MAX_16BIT);

  1031. 		

  1032. 		if (val > SHRT_MAX - *((short *) dst)) {

  1033. 			*((short *)dst) = SHRT_MAX;

  1034. 		} else if (val < SHRT_MIN - *((short *) dst)) {

  1035. 			*((short *)dst) = SHRT_MIN;

  1036. 		} else {

  1037. 			*((short *) dst) += val;

  1038. 		}

  1039. 		dst += dst_skip;

  1040. 		src++;

  1041. 	}

  1042. }	

  1043. 

  1044. void sample_merge_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1045. 

  1046. {

  1047. 	/* ALERT: signed sign-extension portability !!! */

  1048. 

  1049. 	while (nsamples--) {

  1050. 		*((int *) dst) += (((int) (*src * SAMPLE_MAX_24BIT)) << 8);

  1051. 		dst += dst_skip;

  1052. 		src++;

  1053. 	}

  1054. }	

  1055. 

  1056. void memset_interleave (char *dst, char val, unsigned long bytes, 

  1057. 			unsigned long unit_bytes, 

  1058. 			unsigned long skip_bytes) 

  1059. {

  1060. 	switch (unit_bytes) {

  1061. 	case 1:

  1062. 		while (bytes--) {

  1063. 			*dst = val;

  1064. 			dst += skip_bytes;

  1065. 		}

  1066. 		break;

  1067. 	case 2:

  1068. 		while (bytes) {

  1069. 			*((short *) dst) = (short) val;

  1070. 			dst += skip_bytes;

  1071. 			bytes -= 2;

  1072. 		}

  1073. 		break;

  1074. 	case 4:		    

  1075. 		while (bytes) {

  1076. 			*((int *) dst) = (int) val;

  1077. 			dst += skip_bytes;

  1078. 			bytes -= 4;

  1079. 		}

  1080. 		break;

  1081. 	default:

  1082. 		while (bytes) {

  1083. 			memset(dst, val, unit_bytes);

  1084. 			dst += skip_bytes;

  1085. 			bytes -= unit_bytes;

  1086. 		}

  1087. 		break;

  1088. 	}

  1089. }

  1090. 

  1091. /* COPY FUNCTIONS: used to move data from an input channel to an

  1092.    output channel. Note that we assume that the skip distance

  1093.    is the same for both channels. This is completely fine

  1094.    unless the input and output were on different audio interfaces that

  1095.    were interleaved differently. We don't try to handle that.

  1096. */

  1097. 

  1098. void 

  1099. memcpy_fake (char *dst, char *src, unsigned long src_bytes, unsigned long foo, unsigned long bar)

  1100. {

  1101. 	memcpy (dst, src, src_bytes);

  1102. }

  1103. 

  1104. void 

  1105. merge_memcpy_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1106. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1107. {

  1108. 	while (src_bytes) {

  1109. 		*((short *) dst) += *((short *) src);

  1110. 		dst += 2;

  1111. 		src += 2;

  1112. 		src_bytes -= 2;

  1113. 	}

  1114. }

  1115. 

  1116. void 

  1117. merge_memcpy_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1118. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1119. 

  1120. {

  1121. 	while (src_bytes) {

  1122. 		*((int *) dst) += *((int *) src);

  1123. 		dst += 4;

  1124. 		src += 4;

  1125. 		src_bytes -= 4;

  1126. 	}

  1127. }

  1128. 

  1129. void 

  1130. merge_memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes, 

  1131. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1132. 

  1133. {

  1134. 	while (src_bytes) {

  1135. 		*((short *) dst) += *((short *) src);

  1136. 		dst += dst_skip_bytes;

  1137. 		src += src_skip_bytes;

  1138. 		src_bytes -= 2;

  1139. 	}

  1140. }

  1141. 

  1142. void 

  1143. merge_memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1144. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1145. {

  1146. 	while (src_bytes) {

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

  1148. 		dst += dst_skip_bytes;

  1149. 		src += src_skip_bytes;

  1150. 		src_bytes -= 4;

  1151. 	}

  1152. }

  1153. 

  1154. void 

  1155. merge_memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1156. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1157. {

  1158. 	while (src_bytes) {

  1159. 		int acc = (*(int *)dst & 0xFFFFFF) + (*(int *)src & 0xFFFFFF);

  1160. 		memcpy(dst, &acc, 3);

  1161. 		dst += dst_skip_bytes;

  1162. 		src += src_skip_bytes;

  1163. 		src_bytes -= 3;

  1164. 	}

  1165. }

  1166. 

  1167. void 

  1168. memcpy_interleave_d16_s16 (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. 		*((short *) dst) = *((short *) src);

  1173. 		dst += dst_skip_bytes;

  1174. 		src += src_skip_bytes;

  1175. 		src_bytes -= 2;

  1176. 	}

  1177. }

  1178. 

  1179. void 

  1180. 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. {

  1184. 	while (src_bytes) {

  1185. 		memcpy(dst, src, 3);

  1186. 		dst += dst_skip_bytes;

  1187. 		src += src_skip_bytes;

  1188. 		src_bytes -= 3;

  1189. 	}

  1190. }

  1191. 

  1192. void 

  1193. memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1194. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1195. 

  1196. {

  1197. 	while (src_bytes) {

  1198. 		*((int *) dst) = *((int *) src);

  1199. 		dst += dst_skip_bytes;

  1200. 		src += src_skip_bytes;

  1201. 		src_bytes -= 4;

  1202. 	}

  1203. }