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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 <stdint.h>

  32. #include <limits.h>

  33. #include <endian.h>

  34. 

  35. #include <jack/memops.h>

  36. 

  37. #define SAMPLE_MAX_24BIT  8388608.0f

  38. #define SAMPLE_MAX_16BIT  32768.0f

  39. 

  40. /* define these in case we end up on a platform that is missing

  41.    the real lrintf functions

  42. */

  43. 

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

  45. #define f_roundl(f) llrintf(f)

  46. 

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

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

  49. inline unsigned int fast_rand();

  50. 

  51. inline unsigned int fast_rand() {

  52. 	static unsigned int seed = 22222;

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

  54. 

  55. 	return seed;

  56. }

  57. 

  58. 

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

  60. 

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

  62. 	while (nsamples--) {

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

  64. 		dst++;

  65. 		src += src_skip;

  66. 	}

  67. }

  68. 

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

  70. 	while (nsamples--) {

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

  72. 		dst += dst_skip;

  73. 		src++;

  74. 	}

  75. }

  76. 

  77. /* NOTES on function naming:

  78. 

  79.    foo_bar_d<TYPE>_s<TYPE>

  80. 

  81.    the "d<TYPE>" component defines the destination type for the operation

  82.    the "s<TYPE>" component defines the source type for the operation

  83. 

  84.    TYPE can be one of:

  85.    

  86.    S      - sample is a jack_default_audio_sample_t, currently (October 2008) a 32 bit floating point value

  87.    Ss     - like S but reverse endian from the host CPU

  88.    32u24  - sample is an signed 32 bit integer value, but data is in upper 24 bits only

  89.    32u24s - like 32u24 but reverse endian from the host CPU

  90.    24     - sample is an signed 24 bit integer value

  91.    24s    - like 24 but reverse endian from the host CPU

  92.    16     - sample is an signed 16 bit integer value

  93.    16s    - like 16 but reverse endian from the host CPU

  94. 

  95.    For obvious reasons, the reverse endian versions only show as source types.

  96. 

  97.    This covers all known sample formats at 16 bits or larger.

  98. */   

  99. 

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

  101. 

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

  103. {

  104.         int64_t y;

  105. 	int z;

  106. 

  107. 	while (nsamples--) {

  108. 		y = f_roundl(*src * SAMPLE_MAX_24BIT) << 8;

  109. 		if (y > INT_MAX) {

  110. 			z = INT_MAX;

  111. 		} else if (y < INT_MIN) {

  112. 			z = INT_MIN;

  113. 		} else {

  114. 			z = (int)y;

  115. 		}

  116. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  121. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  126. #endif

  127. 		dst += dst_skip;

  128. 		src++;

  129. 	}

  130. }	

  131. 

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

  133. {

  134.     int64_t y;

  135. 

  136. 	while (nsamples--) {

  137. 		y = f_roundl(*src * SAMPLE_MAX_24BIT) << 8;

  138. 		if (y > INT_MAX) {

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

  140. 		} else if (y < INT_MIN) {

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

  142. 		} else {

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

  144. 		}

  145. 		dst += dst_skip;

  146. 		src++;

  147. 	}

  148. }	

  149. 

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

  151. {

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

  153. 

  154. 	while (nsamples--) {

  155. 		int x;

  156. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  158. 		x <<= 8;

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

  160. 		x <<= 8;

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

  162. 		x <<= 8;

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

  164. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  166. 		x <<= 8;

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

  168. 		x <<= 8;

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

  170. 		x <<= 8;

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

  172. #endif

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

  174. 		dst++;

  175. 		src += src_skip;

  176. 	}

  177. }	

  178. 

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

  180. {

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

  182. 

  183. 	while (nsamples--) {

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

  185. 		dst++;

  186. 		src += src_skip;

  187. 	}

  188. }	

  189. 

  190. 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)

  191. {

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

  193. 	jack_default_audio_sample_t  x;

  194. 	int64_t y;

  195. 	int z;

  196. 

  197. 	while (nsamples--) {

  198. 		x = *src * SAMPLE_MAX_16BIT;

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

  200. 		y = f_roundl(x);

  201. 		y <<= 16;

  202. 		if (y > INT_MAX) {

  203. 			z = INT_MAX;

  204. 		} else if (y < INT_MIN) {

  205. 			z = INT_MIN;

  206. 		} else {

  207. 			z = (int) y;

  208. 		}

  209. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  214. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  219. #endif

  220. 		dst += dst_skip;

  221. 		src++;

  222. 	}

  223. }	

  224. 

  225. 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)

  226. {

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

  228. 	jack_default_audio_sample_t  x;

  229. 	int64_t y;

  230. 

  231. 	while (nsamples--) {

  232. 		x = *src * SAMPLE_MAX_16BIT;

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

  234. 		y = f_roundl(x);

  235. 		y <<= 16;

  236. 		if (y > INT_MAX) {

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

  238. 		} else if (y < INT_MIN) {

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

  240. 		} else {

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

  242. 		}

  243. 		dst += dst_skip;

  244. 		src++;

  245. 	}

  246. }	

  247. 

  248. 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)	

  249. {

  250. 	jack_default_audio_sample_t  x;

  251. 	float     r;

  252. 	float     rm1 = state->rm1;

  253. 	int64_t y;

  254. 	int z;

  255. 

  256. 	while (nsamples--) {

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

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

  259. 		x += r - rm1;

  260. 		rm1 = r;

  261. 		y = f_roundl(x);

  262. 		y <<= 16;

  263. 

  264. 		if (y > INT_MAX) {

  265. 			z = INT_MAX;

  266. 		} else if (y < INT_MIN) {

  267. 			z = INT_MIN;

  268. 		} else {

  269. 			z = (int)y;

  270. 		}

  271. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  276. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  281. #endif

  282. 		dst += dst_skip;

  283. 		src++;

  284. 	}

  285. 	state->rm1 = rm1;

  286. }

  287. 

  288. 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)	

  289. {

  290. 	jack_default_audio_sample_t  x;

  291. 	float     r;

  292. 	float     rm1 = state->rm1;

  293. 	int64_t y;

  294. 

  295. 	while (nsamples--) {

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

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

  298. 		x += r - rm1;

  299. 		rm1 = r;

  300. 		y = f_roundl(x);

  301. 		y <<= 16;

  302. 

  303. 		if (y > INT_MAX) {

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

  305. 		} else if (y < INT_MIN) {

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

  307. 		} else {

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

  309. 		}

  310. 

  311. 		dst += dst_skip;

  312. 		src++;

  313. 	}

  314. 	state->rm1 = rm1;

  315. }

  316. 

  317. 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)	

  318. {

  319. 	jack_default_audio_sample_t     x;

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

  321. 	jack_default_audio_sample_t     xp; /* x' */

  322. 	float        r;

  323. 	float        rm1 = state->rm1;

  324. 	unsigned int idx = state->idx;

  325. 	int64_t    y;

  326. 	int z;

  327. 

  328. 	while (nsamples--) {

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

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

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

  332. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  333. 		xe = x

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

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

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

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

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

  339. 		xp = xe + r - rm1;

  340. 		rm1 = r;

  341. 

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

  343. 		y = f_roundl(xp);

  344. 

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

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

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

  348. 

  349. 		y <<= 16;

  350. 

  351. 		if (y > INT_MAX) {

  352. 			z = INT_MAX;

  353. 		} else if (y < INT_MIN) {

  354. 			z = INT_MIN;

  355. 		} else {

  356. 			z = (int)y;

  357. 		}

  358. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  363. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  368. #endif

  369. 		dst += dst_skip;

  370. 		src++;

  371. 	}

  372. 	state->rm1 = rm1;

  373. 	state->idx = idx;

  374. }

  375. 

  376. 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)	

  377. {

  378. 	jack_default_audio_sample_t     x;

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

  380. 	jack_default_audio_sample_t     xp; /* x' */

  381. 	float        r;

  382. 	float        rm1 = state->rm1;

  383. 	unsigned int idx = state->idx;

  384. 	int64_t    y;

  385. 

  386. 	while (nsamples--) {

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

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

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

  390. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  391. 		xe = x

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

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

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

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

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

  397. 		xp = xe + r - rm1;

  398. 		rm1 = r;

  399. 

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

  401. 		y = f_roundl(xp);

  402. 

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

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

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

  406. 

  407. 		y <<= 16;

  408. 

  409. 		if (y > INT_MAX) {

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

  411. 		} else if (y < INT_MIN) {

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

  413. 		} else {

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

  415. 		}

  416. 		dst += dst_skip;

  417. 		src++;

  418. 	}

  419. 	state->rm1 = rm1;

  420. 	state->idx = idx;

  421. }

  422. 

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

  424. {

  425.         int64_t y;

  426. 	int z;

  427. 

  428. 	while (nsamples--) {

  429. 		y = (int64_t)(*src * SAMPLE_MAX_24BIT);

  430. 

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

  432. 			z = (INT_MAX >> 8);

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

  434. 			z = (INT_MIN >> 8 );

  435. 		} else {

  436. 			z = (int)y;

  437. 		}

  438. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  442. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  446. #endif

  447. 		dst += dst_skip;

  448. 		src++;

  449. 	}

  450. }	

  451. 

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

  453. {

  454.         int64_t y;

  455. 

  456. 	while (nsamples--) {

  457. 		y = (int64_t)(*src * SAMPLE_MAX_24BIT);

  458. 

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

  460. 			y = (INT_MAX >> 8);

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

  462. 			y = (INT_MIN >> 8 );

  463. 		}

  464. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  466. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  468. #endif

  469. 		dst += dst_skip;

  470. 		src++;

  471. 	}

  472. }	

  473. 

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

  475. {

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

  477. 

  478. 	while (nsamples--) {

  479. 		int x;

  480. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  482. 		x <<= 8;

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

  484. 		x <<= 8;

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

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

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

  488. 			x |= 0xff << 24;

  489. 		}

  490. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  492. 		x <<= 8;

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

  494. 		x <<= 8;

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

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

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

  498. 			x |= 0xff << 24;

  499. 		}

  500. #endif

  501. 		*dst = x / SAMPLE_MAX_24BIT;

  502. 		dst++;

  503. 		src += src_skip;

  504. 	}

  505. }	

  506. 

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

  508. {

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

  510. 

  511. 	while (nsamples--) {

  512. 		int x;

  513. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  515. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  517. #endif

  518. 		x >>= 8;

  519. 		*dst = x / SAMPLE_MAX_24BIT;

  520. 		dst++;

  521. 		src += src_skip;

  522. 	}

  523. }	

  524. 

  525. 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)

  526. {

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

  528. 	jack_default_audio_sample_t  x;

  529. 	int64_t y;

  530. 	int z;

  531. 

  532. 	while (nsamples--) {

  533. 		x = *src * SAMPLE_MAX_16BIT;

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

  535. 		y = f_roundl(x);

  536. 

  537. 		y <<= 8;

  538. 

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

  540. 			z = (INT_MAX >> 8);

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

  542. 			z = (INT_MIN >> 8);

  543. 		} else {

  544. 			z = (int)y;

  545. 		}

  546. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  550. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  554. #endif

  555. 		dst += dst_skip;

  556. 		src++;

  557. 	}

  558. }	

  559. 

  560. 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)

  561. {

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

  563. 	jack_default_audio_sample_t  x;

  564. 	int64_t y;

  565. 

  566. 	while (nsamples--) {

  567. 		x = *src * SAMPLE_MAX_16BIT;

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

  569. 		y = f_roundl(x);

  570. 

  571. 		y <<= 8;

  572. 

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

  574. 			y = (INT_MAX >> 8);

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

  576. 			y = (INT_MIN >> 8);

  577. 		}

  578. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  580. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  582. #endif

  583. 

  584. 		dst += dst_skip;

  585. 		src++;

  586. 	}

  587. }	

  588. 

  589. 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)	

  590. {

  591. 	jack_default_audio_sample_t  x;

  592. 	float     r;

  593. 	float     rm1 = state->rm1;

  594. 	int64_t y;

  595. 	int z;

  596. 

  597. 	while (nsamples--) {

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

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

  600. 		x += r - rm1;

  601. 		rm1 = r;

  602. 		y = f_roundl(x);

  603. 

  604. 		y <<= 8;

  605. 

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

  607. 			z = (INT_MAX >> 8);

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

  609. 			z = (INT_MIN >> 8);

  610. 		} else {

  611. 			z = (int)y;

  612. 		}

  613. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  617. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  621. #endif

  622. 		dst += dst_skip;

  623. 		src++;

  624. 	}

  625. 	state->rm1 = rm1;

  626. }

  627. 

  628. 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)	

  629. {

  630. 	jack_default_audio_sample_t  x;

  631. 	float     r;

  632. 	float     rm1 = state->rm1;

  633. 	int64_t y;

  634. 

  635. 	while (nsamples--) {

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

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

  638. 		x += r - rm1;

  639. 		rm1 = r;

  640. 		y = f_roundl(x);

  641. 

  642. 		y <<= 8;

  643. 

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

  645. 			y = (INT_MAX >> 8);

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

  647. 			y = (INT_MIN >> 8);

  648. 		}

  649. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  651. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  653. #endif

  654. 

  655. 		dst += dst_skip;

  656. 		src++;

  657. 	}

  658. 	state->rm1 = rm1;

  659. }

  660. 

  661. 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)	

  662. {

  663. 	jack_default_audio_sample_t     x;

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

  665. 	jack_default_audio_sample_t     xp; /* x' */

  666. 	float        r;

  667. 	float        rm1 = state->rm1;

  668. 	unsigned int idx = state->idx;

  669. 	int64_t    y;

  670. 	int z;

  671. 

  672. 	while (nsamples--) {

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

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

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

  676. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  677. 		xe = x

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

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

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

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

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

  683. 		xp = xe + r - rm1;

  684. 		rm1 = r;

  685. 

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

  687. 		y = f_roundl(xp);

  688. 

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

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

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

  692. 

  693. 		y <<= 8;

  694. 

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

  696. 			z = (INT_MAX >> 8);

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

  698. 			z = (INT_MIN >> 8);

  699. 		} else {

  700. 			z = (int)y;

  701. 		}

  702. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  706. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  710. #endif

  711. 		dst += dst_skip;

  712. 		src++;

  713. 	}

  714. 	state->rm1 = rm1;

  715. 	state->idx = idx;

  716. }

  717. 

  718. 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)	

  719. {

  720. 	jack_default_audio_sample_t     x;

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

  722. 	jack_default_audio_sample_t     xp; /* x' */

  723. 	float        r;

  724. 	float        rm1 = state->rm1;

  725. 	unsigned int idx = state->idx;

  726. 	int64_t    y;

  727. 

  728. 	while (nsamples--) {

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

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

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

  732. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  733. 		xe = x

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

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

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

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

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

  739. 		xp = xe + r - rm1;

  740. 		rm1 = r;

  741. 

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

  743. 		y = f_roundl(xp);

  744. 

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

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

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

  748. 

  749. 		y <<= 8;

  750. 

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

  752. 			y = (INT_MAX >> 8);

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

  754. 			y = (INT_MIN >> 8);

  755. 		}

  756. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  758. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  760. #endif

  761. 

  762. 		dst += dst_skip;

  763. 		src++;

  764. 	}

  765. 	state->rm1 = rm1;

  766. 	state->idx = idx;

  767. }

  768. 

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

  770. {

  771. 	int32_t tmp;

  772. 

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

  774. 

  775. 	while (nsamples--) {

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

  777. 		if (tmp > SHRT_MAX) {

  778. 			tmp = SHRT_MAX;

  779. 		} else if (tmp < SHRT_MIN) {

  780. 			tmp = SHRT_MIN;

  781. 		}

  782. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  785. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  788. #endif

  789. 		dst += dst_skip;

  790. 		src++;

  791. 	}

  792. }

  793. 

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

  795. {

  796. 	int32_t tmp;

  797. 

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

  799. 

  800. 	while (nsamples--) {

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

  802. 		if (tmp > SHRT_MAX) {

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

  804. 		} else if (tmp < SHRT_MIN) {

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

  806. 		} else {

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

  808. 		}

  809. 		dst += dst_skip;

  810. 		src++;

  811. 	}

  812. }

  813. 

  814. 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)	

  815. {

  816. 	jack_default_audio_sample_t val;

  817. 	int      tmp;

  818. 

  819. 	while (nsamples--) {

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

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

  822. 		tmp = f_round(val);

  823. 		if (tmp > SHRT_MAX) {

  824. 			tmp = SHRT_MAX;

  825. 		} else if (tmp < SHRT_MIN) {

  826. 			tmp = SHRT_MIN;

  827. 		}

  828. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  831. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  834. #endif

  835. 		dst += dst_skip;

  836. 		src++;

  837. 	}

  838. }

  839. 

  840. 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)	

  841. {

  842. 	jack_default_audio_sample_t val;

  843. 	int      tmp;

  844. 

  845. 	while (nsamples--) {

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

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

  848. 		tmp = f_round(val);

  849. 		if (tmp > SHRT_MAX) {

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

  851. 		} else if (tmp < SHRT_MIN) {

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

  853. 		} else {

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

  855. 		}

  856. 		dst += dst_skip;

  857. 		src++;

  858. 	}

  859. }

  860. 

  861. 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)	

  862. {

  863. 	jack_default_audio_sample_t x;

  864. 	float    r;

  865. 	float    rm1 = state->rm1;

  866. 	int      y;

  867. 

  868. 	while (nsamples--) {

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

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

  871. 		x += r - rm1;

  872. 		rm1 = r;

  873. 		y = f_round(x);

  874. 

  875. 		if (y > SHRT_MAX) {

  876. 			y = SHRT_MAX;

  877. 		} else if (y < SHRT_MIN) {

  878. 			y = SHRT_MIN;

  879. 		}

  880. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  883. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  886. #endif

  887. 		dst += dst_skip;

  888. 		src++;

  889. 	}

  890. 	state->rm1 = rm1;

  891. }

  892. 

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

  894. {

  895. 	jack_default_audio_sample_t x;

  896. 	float    r;

  897. 	float    rm1 = state->rm1;

  898. 	int      y;

  899. 

  900. 	while (nsamples--) {

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

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

  903. 		x += r - rm1;

  904. 		rm1 = r;

  905. 		y = f_round(x);

  906. 

  907. 		if (y > SHRT_MAX) {

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

  909. 		} else if (y < SHRT_MIN) {

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

  911. 		} else {

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

  913. 		}

  914. 

  915. 		dst += dst_skip;

  916. 		src++;

  917. 	}

  918. 	state->rm1 = rm1;

  919. }

  920. 

  921. 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)	

  922. {

  923. 	jack_default_audio_sample_t     x;

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

  925. 	jack_default_audio_sample_t     xp; /* x' */

  926. 	float        r;

  927. 	float        rm1 = state->rm1;

  928. 	unsigned int idx = state->idx;

  929. 	int          y;

  930. 

  931. 	while (nsamples--) {

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

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

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

  935. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  936. 		xe = x

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

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

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

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

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

  942. 		xp = xe + r - rm1;

  943. 		rm1 = r;

  944. 

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

  946. 		y = f_round(xp);

  947. 

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

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

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

  951. 

  952. 		if (y > SHRT_MAX) {

  953. 			y = SHRT_MAX;

  954. 		} else if (y < SHRT_MIN) {

  955. 			y = SHRT_MIN;

  956. 		}

  957. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  960. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  963. #endif

  964. 		dst += dst_skip;

  965. 		src++;

  966. 	}

  967. 	state->rm1 = rm1;

  968. 	state->idx = idx;

  969. }

  970. 

  971. 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)	

  972. {

  973. 	jack_default_audio_sample_t     x;

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

  975. 	jack_default_audio_sample_t     xp; /* x' */

  976. 	float        r;

  977. 	float        rm1 = state->rm1;

  978. 	unsigned int idx = state->idx;

  979. 	int          y;

  980. 

  981. 	while (nsamples--) {

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

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

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

  985. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  986. 		xe = x

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

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

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

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

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

  992. 		xp = xe + r - rm1;

  993. 		rm1 = r;

  994. 

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

  996. 		y = f_round(xp);

  997. 

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

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

  1000. 		state->e[idx] = y - xe;

  1001. 

  1002. 		if (y > SHRT_MAX) {

  1003. 			*((short *)dst) = SHRT_MAX;

  1004. 		} else if (y < SHRT_MIN) {

  1005. 			*((short *)dst) = SHRT_MIN;

  1006. 		} else {

  1007. 			*((short *) dst) = (short)y;

  1008. 		}

  1009. 		dst += dst_skip;

  1010. 		src++;

  1011. 	}

  1012. 	state->rm1 = rm1;

  1013. 	state->idx = idx;

  1014. }

  1015. 

  1016. void sample_move_dS_s16s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 	

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

  1072. 

  1073. 	while (nsamples--) {

  1074. 		*((int *) dst) += (((int) (*src * SAMPLE_MAX_24BIT)) << 8);

  1075. 		dst += dst_skip;

  1076. 		src++;

  1077. 	}

  1078. }	

  1079. 

  1080. void memset_interleave (char *dst, char val, unsigned long bytes, 

  1081. 			unsigned long unit_bytes, 

  1082. 			unsigned long skip_bytes) 

  1083. {

  1084. 	switch (unit_bytes) {

  1085. 	case 1:

  1086. 		while (bytes--) {

  1087. 			*dst = val;

  1088. 			dst += skip_bytes;

  1089. 		}

  1090. 		break;

  1091. 	case 2:

  1092. 		while (bytes) {

  1093. 			*((short *) dst) = (short) val;

  1094. 			dst += skip_bytes;

  1095. 			bytes -= 2;

  1096. 		}

  1097. 		break;

  1098. 	case 4:		    

  1099. 		while (bytes) {

  1100. 			*((int *) dst) = (int) val;

  1101. 			dst += skip_bytes;

  1102. 			bytes -= 4;

  1103. 		}

  1104. 		break;

  1105. 	default:

  1106. 		while (bytes) {

  1107. 			memset(dst, val, unit_bytes);

  1108. 			dst += skip_bytes;

  1109. 			bytes -= unit_bytes;

  1110. 		}

  1111. 		break;

  1112. 	}

  1113. }

  1114. 

  1115. /* COPY FUNCTIONS: used to move data from an input channel to an

  1116.    output channel. Note that we assume that the skip distance

  1117.    is the same for both channels. This is completely fine

  1118.    unless the input and output were on different audio interfaces that

  1119.    were interleaved differently. We don't try to handle that.

  1120. */

  1121. 

  1122. void 

  1123. memcpy_fake (char *dst, char *src, unsigned long src_bytes, unsigned long foo, unsigned long bar)

  1124. {

  1125. 	memcpy (dst, src, src_bytes);

  1126. }

  1127. 

  1128. void 

  1129. merge_memcpy_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1130. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1131. {

  1132. 	while (src_bytes) {

  1133. 		*((short *) dst) += *((short *) src);

  1134. 		dst += 2;

  1135. 		src += 2;

  1136. 		src_bytes -= 2;

  1137. 	}

  1138. }

  1139. 

  1140. void 

  1141. merge_memcpy_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1142. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1143. 

  1144. {

  1145. 	while (src_bytes) {

  1146. 		*((int *) dst) += *((int *) src);

  1147. 		dst += 4;

  1148. 		src += 4;

  1149. 		src_bytes -= 4;

  1150. 	}

  1151. }

  1152. 

  1153. void 

  1154. merge_memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes, 

  1155. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1156. {

  1157. 	while (src_bytes) {

  1158. 		*((short *) dst) += *((short *) src);

  1159. 		dst += dst_skip_bytes;

  1160. 		src += src_skip_bytes;

  1161. 		src_bytes -= 2;

  1162. 	}

  1163. }

  1164. 

  1165. void 

  1166. merge_memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1167. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1168. {

  1169. 	while (src_bytes) {

  1170. 		*((int *) dst) += *((int *) src);

  1171. 		dst += dst_skip_bytes;

  1172. 		src += src_skip_bytes;

  1173. 		src_bytes -= 4;

  1174. 	}

  1175. }

  1176. 

  1177. void 

  1178. merge_memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1179. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1180. {

  1181. 	while (src_bytes) {

  1182. 		int acc = (*(int *)dst & 0xFFFFFF) + (*(int *)src & 0xFFFFFF);

  1183. 		memcpy(dst, &acc, 3);

  1184. 		dst += dst_skip_bytes;

  1185. 		src += src_skip_bytes;

  1186. 		src_bytes -= 3;

  1187. 	}

  1188. }

  1189. 

  1190. void 

  1191. memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1192. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1193. {

  1194. 	while (src_bytes) {

  1195. 		*((short *) dst) = *((short *) src);

  1196. 		dst += dst_skip_bytes;

  1197. 		src += src_skip_bytes;

  1198. 		src_bytes -= 2;

  1199. 	}

  1200. }

  1201. 

  1202. void 

  1203. memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1204. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1205. 

  1206. {

  1207. 	while (src_bytes) {

  1208. 		memcpy(dst, src, 3);

  1209. 		dst += dst_skip_bytes;

  1210. 		src += src_skip_bytes;

  1211. 		src_bytes -= 3;

  1212. 	}

  1213. }

  1214. 

  1215. void 

  1216. memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1217. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1218. 

  1219. {

  1220. 	while (src_bytes) {

  1221. 		*((int *) dst) = *((int *) src);

  1222. 		dst += dst_skip_bytes;

  1223. 		src += src_skip_bytes;

  1224. 		src_bytes -= 4;

  1225. 	}

  1226. }