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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 these in case we end up on a platform that is missing

  40.    the real lrintf functions

  41. */

  42. 

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

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

  45. 

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

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

  48. inline unsigned int fast_rand();

  49. 

  50. inline unsigned int fast_rand() {

  51. 	static unsigned int seed = 22222;

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

  53. 

  54. 	return seed;

  55. }

  56. 

  57. 

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

  59. 

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

  61. 	while (nsamples--) {

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

  63. 		dst++;

  64. 		src += src_skip;

  65. 	}

  66. }

  67. 

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

  69. 	while (nsamples--) {

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

  71. 		dst += dst_skip;

  72. 		src++;

  73. 	}

  74. }

  75. 

  76. /* NOTES on function naming:

  77. 

  78.    foo_bar_d<TYPE>_s<TYPE>

  79. 

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

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

  82. 

  83.    TYPE can be one of:

  84.    

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

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

  87.    32u24  - sample is an signed 32 bit integer value, but data is in upper 24 bits only

  88.    32u24s - like 32u24 but reverse endian from the host CPU

  89.    24     - sample is an signed 24 bit integer value

  90.    24s    - like 24 but reverse endian from the host CPU

  91.    16     - sample is an signed 16 bit integer value

  92.    16s    - like 16 but reverse endian from the host CPU

  93. 

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

  95. 

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

  97. */   

  98. 

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

  100. 

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

  102. {

  103.         long long y;

  104. 	int z;

  105. 

  106. 	while (nsamples--) {

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

  108. 		if (y > INT_MAX) {

  109. 			z = INT_MAX;

  110. 		} else if (y < INT_MIN) {

  111. 			z = INT_MIN;

  112. 		} else {

  113. 			z = (int)y;

  114. 		}

  115. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  120. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  125. #endif

  126. 		dst += dst_skip;

  127. 		src++;

  128. 	}

  129. }	

  130. 

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

  132. {

  133.     long long y;

  134. 

  135. 	while (nsamples--) {

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

  137. 		if (y > INT_MAX) {

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

  139. 		} else if (y < INT_MIN) {

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

  141. 		} else {

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

  143. 		}

  144. 		dst += dst_skip;

  145. 		src++;

  146. 	}

  147. }	

  148. 

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

  150. {

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

  152. 

  153. 	while (nsamples--) {

  154. 		int x;

  155. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  157. 		x <<= 8;

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

  159. 		x <<= 8;

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

  161. 		x <<= 8;

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

  163. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  165. 		x <<= 8;

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

  167. 		x <<= 8;

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

  169. 		x <<= 8;

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

  171. #endif

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

  173. 		dst++;

  174. 		src += src_skip;

  175. 	}

  176. }	

  177. 

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

  179. {

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

  181. 

  182. 	while (nsamples--) {

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

  184. 		dst++;

  185. 		src += src_skip;

  186. 	}

  187. }	

  188. 

  189. 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)

  190. {

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

  192. 	jack_default_audio_sample_t  x;

  193. 	long long y;

  194. 	int z;

  195. 

  196. 	while (nsamples--) {

  197. 		x = *src * SAMPLE_MAX_16BIT;

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

  199. 		y = f_roundl(x);

  200. 		y <<= 16;

  201. 		if (y > INT_MAX) {

  202. 			z = INT_MAX;

  203. 		} else if (y < INT_MIN) {

  204. 			z = INT_MIN;

  205. 		} else {

  206. 			z = (int) y;

  207. 		}

  208. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  213. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  218. #endif

  219. 		dst += dst_skip;

  220. 		src++;

  221. 	}

  222. }	

  223. 

  224. 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)

  225. {

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

  227. 	jack_default_audio_sample_t  x;

  228. 	long long y;

  229. 

  230. 	while (nsamples--) {

  231. 		x = *src * SAMPLE_MAX_16BIT;

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

  233. 		y = f_roundl(x);

  234. 		y <<= 16;

  235. 		if (y > INT_MAX) {

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

  237. 		} else if (y < INT_MIN) {

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

  239. 		} else {

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

  241. 		}

  242. 		dst += dst_skip;

  243. 		src++;

  244. 	}

  245. }	

  246. 

  247. 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)	

  248. {

  249. 	jack_default_audio_sample_t  x;

  250. 	float     r;

  251. 	float     rm1 = state->rm1;

  252. 	long long y;

  253. 	int z;

  254. 

  255. 	while (nsamples--) {

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

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

  258. 		x += r - rm1;

  259. 		rm1 = r;

  260. 		y = f_roundl(x);

  261. 		y <<= 16;

  262. 

  263. 		if (y > INT_MAX) {

  264. 			z = INT_MAX;

  265. 		} else if (y < INT_MIN) {

  266. 			z = INT_MIN;

  267. 		} else {

  268. 			z = (int)y;

  269. 		}

  270. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  275. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  280. #endif

  281. 		dst += dst_skip;

  282. 		src++;

  283. 	}

  284. 	state->rm1 = rm1;

  285. }

  286. 

  287. 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)	

  288. {

  289. 	jack_default_audio_sample_t  x;

  290. 	float     r;

  291. 	float     rm1 = state->rm1;

  292. 	long long y;

  293. 

  294. 	while (nsamples--) {

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

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

  297. 		x += r - rm1;

  298. 		rm1 = r;

  299. 		y = f_roundl(x);

  300. 		y <<= 16;

  301. 

  302. 		if (y > INT_MAX) {

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

  304. 		} else if (y < INT_MIN) {

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

  306. 		} else {

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

  308. 		}

  309. 

  310. 		dst += dst_skip;

  311. 		src++;

  312. 	}

  313. 	state->rm1 = rm1;

  314. }

  315. 

  316. 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)	

  317. {

  318. 	jack_default_audio_sample_t     x;

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

  320. 	jack_default_audio_sample_t     xp; /* x' */

  321. 	float        r;

  322. 	float        rm1 = state->rm1;

  323. 	unsigned int idx = state->idx;

  324. 	long long    y;

  325. 	int z;

  326. 

  327. 	while (nsamples--) {

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

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

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

  331. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  332. 		xe = x

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

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

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

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

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

  338. 		xp = xe + r - rm1;

  339. 		rm1 = r;

  340. 

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

  342. 		y = f_roundl(xp);

  343. 

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

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

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

  347. 

  348. 		y <<= 16;

  349. 

  350. 		if (y > INT_MAX) {

  351. 			z = INT_MAX;

  352. 		} else if (y < INT_MIN) {

  353. 			z = INT_MIN;

  354. 		} else {

  355. 			z = (int)y;

  356. 		}

  357. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

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

  362. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

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

  367. #endif

  368. 		dst += dst_skip;

  369. 		src++;

  370. 	}

  371. 	state->rm1 = rm1;

  372. 	state->idx = idx;

  373. }

  374. 

  375. 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)	

  376. {

  377. 	jack_default_audio_sample_t     x;

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

  379. 	jack_default_audio_sample_t     xp; /* x' */

  380. 	float        r;

  381. 	float        rm1 = state->rm1;

  382. 	unsigned int idx = state->idx;

  383. 	long long    y;

  384. 

  385. 	while (nsamples--) {

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

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

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

  389. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  390. 		xe = x

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

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

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

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

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

  396. 		xp = xe + r - rm1;

  397. 		rm1 = r;

  398. 

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

  400. 		y = f_roundl(xp);

  401. 

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

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

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

  405. 

  406. 		y <<= 16;

  407. 

  408. 		if (y > INT_MAX) {

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

  410. 		} else if (y < INT_MIN) {

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

  412. 		} else {

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

  414. 		}

  415. 		dst += dst_skip;

  416. 		src++;

  417. 	}

  418. 	state->rm1 = rm1;

  419. 	state->idx = idx;

  420. }

  421. 

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

  423. {

  424.         long long y;

  425. 	int z;

  426. 

  427. 	while (nsamples--) {

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

  429. 

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

  431. 			z = (INT_MAX >> 8);

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

  433. 			z = (INT_MIN >> 8 );

  434. 		} else {

  435. 			z = (int)y;

  436. 		}

  437. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  441. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  445. #endif

  446. 		dst += dst_skip;

  447. 		src++;

  448. 	}

  449. }	

  450. 

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

  452. {

  453.         long long y;

  454. 

  455. 	while (nsamples--) {

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

  457. 

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

  459. 			y = (INT_MAX >> 8);

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

  461. 			y = (INT_MIN >> 8 );

  462. 		}

  463. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  465. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  467. #endif

  468. 		dst += dst_skip;

  469. 		src++;

  470. 	}

  471. }	

  472. 

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

  474. {

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

  476. 

  477. 	while (nsamples--) {

  478. 		int x;

  479. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  481. 		x <<= 8;

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

  483. 		x <<= 8;

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

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

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

  487. 			x |= 0xff << 24;

  488. 		}

  489. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  491. 		x <<= 8;

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

  493. 		x <<= 8;

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

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

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

  497. 			x |= 0xff << 24;

  498. 		}

  499. #endif

  500. 		*dst = x / SAMPLE_MAX_24BIT;

  501. 		dst++;

  502. 		src += src_skip;

  503. 	}

  504. }	

  505. 

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

  507. {

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

  509. 

  510. 	while (nsamples--) {

  511. 		int x;

  512. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  514. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  516. #endif

  517. 		x >>= 8;

  518. 		*dst = x / SAMPLE_MAX_24BIT;

  519. 		dst++;

  520. 		src += src_skip;

  521. 	}

  522. }	

  523. 

  524. 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)

  525. {

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

  527. 	jack_default_audio_sample_t  x;

  528. 	long long y;

  529. 	int z;

  530. 

  531. 	while (nsamples--) {

  532. 		x = *src * SAMPLE_MAX_16BIT;

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

  534. 		y = f_roundl(x);

  535. 

  536. 		y <<= 8;

  537. 

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

  539. 			z = (INT_MAX >> 8);

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

  541. 			z = (INT_MIN >> 8);

  542. 		} else {

  543. 			z = (int)y;

  544. 		}

  545. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  549. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  553. #endif

  554. 		dst += dst_skip;

  555. 		src++;

  556. 	}

  557. }	

  558. 

  559. 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)

  560. {

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

  562. 	jack_default_audio_sample_t  x;

  563. 	long long y;

  564. 

  565. 	while (nsamples--) {

  566. 		x = *src * SAMPLE_MAX_16BIT;

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

  568. 		y = f_roundl(x);

  569. 

  570. 		y <<= 8;

  571. 

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

  573. 			y = (INT_MAX >> 8);

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

  575. 			y = (INT_MIN >> 8);

  576. 		}

  577. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  579. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  581. #endif

  582. 

  583. 		dst += dst_skip;

  584. 		src++;

  585. 	}

  586. }	

  587. 

  588. 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)	

  589. {

  590. 	jack_default_audio_sample_t  x;

  591. 	float     r;

  592. 	float     rm1 = state->rm1;

  593. 	long long y;

  594. 	int z;

  595. 

  596. 	while (nsamples--) {

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

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

  599. 		x += r - rm1;

  600. 		rm1 = r;

  601. 		y = f_roundl(x);

  602. 

  603. 		y <<= 8;

  604. 

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

  606. 			z = (INT_MAX >> 8);

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

  608. 			z = (INT_MIN >> 8);

  609. 		} else {

  610. 			z = (int)y;

  611. 		}

  612. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  616. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  620. #endif

  621. 		dst += dst_skip;

  622. 		src++;

  623. 	}

  624. 	state->rm1 = rm1;

  625. }

  626. 

  627. 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)	

  628. {

  629. 	jack_default_audio_sample_t  x;

  630. 	float     r;

  631. 	float     rm1 = state->rm1;

  632. 	long long y;

  633. 

  634. 	while (nsamples--) {

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

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

  637. 		x += r - rm1;

  638. 		rm1 = r;

  639. 		y = f_roundl(x);

  640. 

  641. 		y <<= 8;

  642. 

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

  644. 			y = (INT_MAX >> 8);

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

  646. 			y = (INT_MIN >> 8);

  647. 		}

  648. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  650. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  652. #endif

  653. 

  654. 		dst += dst_skip;

  655. 		src++;

  656. 	}

  657. 	state->rm1 = rm1;

  658. }

  659. 

  660. 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)	

  661. {

  662. 	jack_default_audio_sample_t     x;

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

  664. 	jack_default_audio_sample_t     xp; /* x' */

  665. 	float        r;

  666. 	float        rm1 = state->rm1;

  667. 	unsigned int idx = state->idx;

  668. 	long long    y;

  669. 	int z;

  670. 

  671. 	while (nsamples--) {

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

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

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

  675. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  676. 		xe = x

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

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

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

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

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

  682. 		xp = xe + r - rm1;

  683. 		rm1 = r;

  684. 

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

  686. 		y = f_roundl(xp);

  687. 

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

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

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

  691. 

  692. 		y <<= 8;

  693. 

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

  695. 			z = (INT_MAX >> 8);

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

  697. 			z = (INT_MIN >> 8);

  698. 		} else {

  699. 			z = (int)y;

  700. 		}

  701. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

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

  705. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

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

  709. #endif

  710. 		dst += dst_skip;

  711. 		src++;

  712. 	}

  713. 	state->rm1 = rm1;

  714. 	state->idx = idx;

  715. }

  716. 

  717. 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)	

  718. {

  719. 	jack_default_audio_sample_t     x;

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

  721. 	jack_default_audio_sample_t     xp; /* x' */

  722. 	float        r;

  723. 	float        rm1 = state->rm1;

  724. 	unsigned int idx = state->idx;

  725. 	long long    y;

  726. 

  727. 	while (nsamples--) {

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

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

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

  731. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  732. 		xe = x

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

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

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

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

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

  738. 		xp = xe + r - rm1;

  739. 		rm1 = r;

  740. 

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

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

  743. 

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

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

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

  747. 

  748. 		y <<= 8;

  749. 

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

  751. 			y = (INT_MAX >> 8);

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

  753. 			y = (INT_MIN >> 8);

  754. 		}

  755. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

  757. #elif __BYTE_ORDER == __BIG_ENDIAN

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

  759. #endif

  760. 

  761. 		dst += dst_skip;

  762. 		src++;

  763. 	}

  764. 	state->rm1 = rm1;

  765. 	state->idx = idx;

  766. }

  767. 

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

  769. {

  770. 	int tmp;

  771. 

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

  773. 

  774. 	while (nsamples--) {

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

  776. 		if (tmp > SHRT_MAX) {

  777. 			tmp = SHRT_MAX;

  778. 		} else if (tmp < SHRT_MIN) {

  779. 			tmp = SHRT_MIN;

  780. 		}

  781. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  784. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  787. #endif

  788. 		dst += dst_skip;

  789. 		src++;

  790. 	}

  791. }

  792. 

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

  794. {

  795. 	int tmp;

  796. 

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

  798. 

  799. 	while (nsamples--) {

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

  801. 		if (tmp > SHRT_MAX) {

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

  803. 		} else if (tmp < SHRT_MIN) {

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

  805. 		} else {

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

  807. 		}

  808. 		dst += dst_skip;

  809. 		src++;

  810. 	}

  811. }

  812. 

  813. 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)	

  814. {

  815. 	jack_default_audio_sample_t val;

  816. 	int      tmp;

  817. 

  818. 	while (nsamples--) {

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

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

  821. 		tmp = f_round(val);

  822. 		if (tmp > SHRT_MAX) {

  823. 			tmp = SHRT_MAX;

  824. 		} else if (tmp < SHRT_MIN) {

  825. 			tmp = SHRT_MIN;

  826. 		}

  827. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  830. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  833. #endif

  834. 		dst += dst_skip;

  835. 		src++;

  836. 	}

  837. }

  838. 

  839. 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)	

  840. {

  841. 	jack_default_audio_sample_t val;

  842. 	int      tmp;

  843. 

  844. 	while (nsamples--) {

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

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

  847. 		tmp = f_round(val);

  848. 		if (tmp > SHRT_MAX) {

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

  850. 		} else if (tmp < SHRT_MIN) {

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

  852. 		} else {

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

  854. 		}

  855. 		dst += dst_skip;

  856. 		src++;

  857. 	}

  858. }

  859. 

  860. 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)	

  861. {

  862. 	jack_default_audio_sample_t x;

  863. 	float    r;

  864. 	float    rm1 = state->rm1;

  865. 	int      y;

  866. 

  867. 	while (nsamples--) {

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

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

  870. 		x += r - rm1;

  871. 		rm1 = r;

  872. 		y = f_round(x);

  873. 

  874. 		if (y > SHRT_MAX) {

  875. 			y = SHRT_MAX;

  876. 		} else if (y < SHRT_MIN) {

  877. 			y = SHRT_MIN;

  878. 		}

  879. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  882. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  885. #endif

  886. 		dst += dst_skip;

  887. 		src++;

  888. 	}

  889. 	state->rm1 = rm1;

  890. }

  891. 

  892. 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)	

  893. {

  894. 	jack_default_audio_sample_t x;

  895. 	float    r;

  896. 	float    rm1 = state->rm1;

  897. 	int      y;

  898. 

  899. 	while (nsamples--) {

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

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

  902. 		x += r - rm1;

  903. 		rm1 = r;

  904. 		y = f_round(x);

  905. 

  906. 		if (y > SHRT_MAX) {

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

  908. 		} else if (y < SHRT_MIN) {

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

  910. 		} else {

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

  912. 		}

  913. 

  914. 		dst += dst_skip;

  915. 		src++;

  916. 	}

  917. 	state->rm1 = rm1;

  918. }

  919. 

  920. 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)	

  921. {

  922. 	jack_default_audio_sample_t     x;

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

  924. 	jack_default_audio_sample_t     xp; /* x' */

  925. 	float        r;

  926. 	float        rm1 = state->rm1;

  927. 	unsigned int idx = state->idx;

  928. 	int          y;

  929. 

  930. 	while (nsamples--) {

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

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

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

  934. 		   [2.033 -2.165 1.959 -1.590 0.6149] */

  935. 		xe = x

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

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

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

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

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

  941. 		xp = xe + r - rm1;

  942. 		rm1 = r;

  943. 

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

  945. 		y = f_round(xp);

  946. 

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

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

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

  950. 

  951. 		if (y > SHRT_MAX) {

  952. 			y = SHRT_MAX;

  953. 		} else if (y < SHRT_MIN) {

  954. 			y = SHRT_MIN;

  955. 		}

  956. #if __BYTE_ORDER == __LITTLE_ENDIAN

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

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

  959. #elif __BYTE_ORDER == __BIG_ENDIAN

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

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

  962. #endif

  963. 		dst += dst_skip;

  964. 		src++;

  965. 	}

  966. 	state->rm1 = rm1;

  967. 	state->idx = idx;

  968. }

  969. 

  970. 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)	

  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. 	short z;

  1018. 

  1019. 	/* ALERT: signed sign-extension portability !!! */

  1020. 	while (nsamples--) {

  1021. #if __BYTE_ORDER == __LITTLE_ENDIAN

  1022. 		z = (unsigned char)(src[0]);

  1023. 		z <<= 8;

  1024. 		z |= (unsigned char)(src[1]);

  1025. #elif __BYTE_ORDER == __BIG_ENDIAN

  1026. 		z = (unsigned char)(src[1]);

  1027. 		z <<= 8;

  1028. 		z |= (unsigned char)(src[0]);

  1029. #endif

  1030. 		*dst = z / SAMPLE_MAX_16BIT;

  1031. 		dst++;

  1032. 		src += src_skip;

  1033. 	}

  1034. }	

  1035. 

  1036. void sample_move_dS_s16 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) 

  1037. 	

  1038. {

  1039. 	/* ALERT: signed sign-extension portability !!! */

  1040. 	while (nsamples--) {

  1041. 		*dst = (*((short *) src)) / SAMPLE_MAX_16BIT;

  1042. 		dst++;

  1043. 		src += src_skip;

  1044. 	}

  1045. }	

  1046. 

  1047. void sample_merge_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1048. {

  1049. 	short val;

  1050. 

  1051. 	/* ALERT: signed sign-extension portability !!! */

  1052. 	

  1053. 	while (nsamples--) {

  1054. 		val = (short) (*src * SAMPLE_MAX_16BIT);

  1055. 		

  1056. 		if (val > SHRT_MAX - *((short *) dst)) {

  1057. 			*((short *)dst) = SHRT_MAX;

  1058. 		} else if (val < SHRT_MIN - *((short *) dst)) {

  1059. 			*((short *)dst) = SHRT_MIN;

  1060. 		} else {

  1061. 			*((short *) dst) += val;

  1062. 		}

  1063. 		dst += dst_skip;

  1064. 		src++;

  1065. 	}

  1066. }	

  1067. 

  1068. void sample_merge_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

  1069. {

  1070. 	/* ALERT: signed sign-extension portability !!! */

  1071. 

  1072. 	while (nsamples--) {

  1073. 		*((int *) dst) += (((int) (*src * SAMPLE_MAX_24BIT)) << 8);

  1074. 		dst += dst_skip;

  1075. 		src++;

  1076. 	}

  1077. }	

  1078. 

  1079. void memset_interleave (char *dst, char val, unsigned long bytes, 

  1080. 			unsigned long unit_bytes, 

  1081. 			unsigned long skip_bytes) 

  1082. {

  1083. 	switch (unit_bytes) {

  1084. 	case 1:

  1085. 		while (bytes--) {

  1086. 			*dst = val;

  1087. 			dst += skip_bytes;

  1088. 		}

  1089. 		break;

  1090. 	case 2:

  1091. 		while (bytes) {

  1092. 			*((short *) dst) = (short) val;

  1093. 			dst += skip_bytes;

  1094. 			bytes -= 2;

  1095. 		}

  1096. 		break;

  1097. 	case 4:		    

  1098. 		while (bytes) {

  1099. 			*((int *) dst) = (int) val;

  1100. 			dst += skip_bytes;

  1101. 			bytes -= 4;

  1102. 		}

  1103. 		break;

  1104. 	default:

  1105. 		while (bytes) {

  1106. 			memset(dst, val, unit_bytes);

  1107. 			dst += skip_bytes;

  1108. 			bytes -= unit_bytes;

  1109. 		}

  1110. 		break;

  1111. 	}

  1112. }

  1113. 

  1114. /* COPY FUNCTIONS: used to move data from an input channel to an

  1115.    output channel. Note that we assume that the skip distance

  1116.    is the same for both channels. This is completely fine

  1117.    unless the input and output were on different audio interfaces that

  1118.    were interleaved differently. We don't try to handle that.

  1119. */

  1120. 

  1121. void 

  1122. memcpy_fake (char *dst, char *src, unsigned long src_bytes, unsigned long foo, unsigned long bar)

  1123. {

  1124. 	memcpy (dst, src, src_bytes);

  1125. }

  1126. 

  1127. void 

  1128. merge_memcpy_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1129. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1130. {

  1131. 	while (src_bytes) {

  1132. 		*((short *) dst) += *((short *) src);

  1133. 		dst += 2;

  1134. 		src += 2;

  1135. 		src_bytes -= 2;

  1136. 	}

  1137. }

  1138. 

  1139. void 

  1140. merge_memcpy_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1141. 		      unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1142. 

  1143. {

  1144. 	while (src_bytes) {

  1145. 		*((int *) dst) += *((int *) src);

  1146. 		dst += 4;

  1147. 		src += 4;

  1148. 		src_bytes -= 4;

  1149. 	}

  1150. }

  1151. 

  1152. void 

  1153. merge_memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes, 

  1154. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1155. {

  1156. 	while (src_bytes) {

  1157. 		*((short *) dst) += *((short *) src);

  1158. 		dst += dst_skip_bytes;

  1159. 		src += src_skip_bytes;

  1160. 		src_bytes -= 2;

  1161. 	}

  1162. }

  1163. 

  1164. void 

  1165. merge_memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1166. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1167. {

  1168. 	while (src_bytes) {

  1169. 		*((int *) dst) += *((int *) src);

  1170. 		dst += dst_skip_bytes;

  1171. 		src += src_skip_bytes;

  1172. 		src_bytes -= 4;

  1173. 	}

  1174. }

  1175. 

  1176. void 

  1177. merge_memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1178. 				 unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1179. {

  1180. 	while (src_bytes) {

  1181. 		int acc = (*(int *)dst & 0xFFFFFF) + (*(int *)src & 0xFFFFFF);

  1182. 		memcpy(dst, &acc, 3);

  1183. 		dst += dst_skip_bytes;

  1184. 		src += src_skip_bytes;

  1185. 		src_bytes -= 3;

  1186. 	}

  1187. }

  1188. 

  1189. void 

  1190. memcpy_interleave_d16_s16 (char *dst, char *src, unsigned long src_bytes,

  1191. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1192. {

  1193. 	while (src_bytes) {

  1194. 		*((short *) dst) = *((short *) src);

  1195. 		dst += dst_skip_bytes;

  1196. 		src += src_skip_bytes;

  1197. 		src_bytes -= 2;

  1198. 	}

  1199. }

  1200. 

  1201. void 

  1202. memcpy_interleave_d24_s24 (char *dst, char *src, unsigned long src_bytes,

  1203. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1204. 

  1205. {

  1206. 	while (src_bytes) {

  1207. 		memcpy(dst, src, 3);

  1208. 		dst += dst_skip_bytes;

  1209. 		src += src_skip_bytes;

  1210. 		src_bytes -= 3;

  1211. 	}

  1212. }

  1213. 

  1214. void 

  1215. memcpy_interleave_d32_s32 (char *dst, char *src, unsigned long src_bytes,

  1216. 			   unsigned long dst_skip_bytes, unsigned long src_skip_bytes)

  1217. 

  1218. {

  1219. 	while (src_bytes) {

  1220. 		*((int *) dst) = *((int *) src);

  1221. 		dst += dst_skip_bytes;

  1222. 		src += src_skip_bytes;

  1223. 		src_bytes -= 4;

  1224. 	}

  1225. }