/xbmc/cores/paplayer/WavPackCodec/extra1.c

https://github.com/tmacreturns/XBMC_wireless_setup · C · 563 lines · 431 code · 116 blank · 16 comment · 126 complexity · 24cdd0e17474c74f289614ce13fdeeb9 MD5 · raw file 

    

  1. ////////////////////////////////////////////////////////////////////////////
    2. 

  2. //			     **** WAVPACK ****				  //
    3. 

  3. //		    Hybrid Lossless Wavefile Compressor			  //
    4. 

  4. //		Copyright (c) 1998 - 2005 Conifer Software.		  //
    5. 

  5. //			    All Rights Reserved.			  //
    6. 

  6. //      Distributed under the BSD Software License (see license.txt)      //
    7. 

  7. ////////////////////////////////////////////////////////////////////////////
    8. 

  8. 

  9. // extra1.c
    10. 

  10. 

  11. // This module handles the "extra" mode for mono files.
    12. 

  12. 

  13. #include "wavpack.h"
    14. 

  14. 

  15. #include <stdlib.h>
    16. 

  16. #include <stdio.h>
    17. 

  17. #include <string.h>
    18. 

  18. #include <math.h>
    19. 

  19. 

  20. // #define EXTRA_DUMP
    21. 

  21. 

  22. #ifdef DEBUG_ALLOC
    23. 

  23. #define malloc malloc_db
    24. 

  24. #define realloc realloc_db
    25. 

  25. #define free free_db
    26. 

  26. void *malloc_db (uint32_t size);
    27. 

  27. void *realloc_db (void *ptr, uint32_t size);
    28. 

  28. void free_db (void *ptr);
    29. 

  29. int32_t dump_alloc (void);
    30. 

  30. #endif
    31. 

  31. 

  32. //////////////////////////////// local tables ///////////////////////////////
    33. 

  33. 

  34. extern const char default_terms [], high_terms [], fast_terms [];
    35. 

  35. 

  36. // #define MINMAX_WEIGHTS
    37. 

  37. 

  38. #ifdef MINMAX_WEIGHTS
    39. 

  39. static int32_t min_weight, max_weight;
    40. 

  40. static int min_term, max_term;
    41. 

  41. #endif
    42. 

  42. 

  43. static void decorr_mono_pass (int32_t *in_samples, int32_t *out_samples, uint32_t num_samples, struct decorr_pass *dpp, int dir)
    44. 

  44. {
    45. 

  45.     int m = 0;
    46. 

  46. 

  47.     dpp->sum_A = 0;
    48. 

  48. 

  49. #ifdef MINMAX_WEIGHTS
    50. 

  50.     dpp->min = dpp->max = 0;
    51. 

  51. #endif
    52. 

  52. 

  53.     if (dir < 0) {
    54. 

  54. 	out_samples += (num_samples - 1);
    55. 

  55. 	in_samples += (num_samples - 1);
    56. 

  56. 	dir = -1;
    57. 

  57.     }
    58. 

  58.     else
    59. 

  59. 	dir = 1;
    60. 

  60. 

  61.     if (dpp->term > MAX_TERM) {
    62. 

  62. 	while (num_samples--) {
    63. 

  63. 	    int32_t left, sam_A;
    64. 

  64. 

  65. 	    if (dpp->term & 1)
    66. 

  66. 		sam_A = 2 * dpp->samples_A [0] - dpp->samples_A [1];
    67. 

  67. 	    else
    68. 

  68. 		sam_A = (3 * dpp->samples_A [0] - dpp->samples_A [1]) >> 1;
    69. 

  69. 

  70. 	    dpp->samples_A [1] = dpp->samples_A [0];
    71. 

  71. 	    dpp->samples_A [0] = left = in_samples [0];
    72. 

  72. 

  73. 	    left -= apply_weight (dpp->weight_A, sam_A);
    74. 

  74. 	    update_weight (dpp->weight_A, dpp->delta, sam_A, left);
    75. 

  75. 	    dpp->sum_A += dpp->weight_A;
    76. 

  76. #ifdef MINMAX_WEIGHTS
    77. 

  77. 	    if (dpp->weight_A > dpp->max) dpp->max = dpp->weight_A;
    78. 

  78. 	    if (dpp->weight_A < dpp->min) dpp->min = dpp->weight_A;
    79. 

  79. #endif
    80. 

  80. 	    out_samples [0] = left;
    81. 

  81. 	    in_samples += dir;
    82. 

  82. 	    out_samples += dir;
    83. 

  83. 	}
    84. 

  84.     }
    85. 

  85.     else if (dpp->term > 0) {
    86. 

  86. 	while (num_samples--) {
    87. 

  87. 	    int k = (m + dpp->term) & (MAX_TERM - 1);
    88. 

  88. 	    int32_t left, sam_A;
    89. 

  89. 

  90. 	    sam_A = dpp->samples_A [m];
    91. 

  91. 	    dpp->samples_A [k] = left = in_samples [0];
    92. 

  92. 	    m = (m + 1) & (MAX_TERM - 1);
    93. 

  93. 

  94. 	    left -= apply_weight (dpp->weight_A, sam_A);
    95. 

  95. 	    update_weight (dpp->weight_A, dpp->delta, sam_A, left);
    96. 

  96. 	    dpp->sum_A += dpp->weight_A;
    97. 

  97. #ifdef MINMAX_WEIGHTS
    98. 

  98. 	    if (dpp->weight_A > dpp->max) dpp->max = dpp->weight_A;
    99. 

  99. 	    if (dpp->weight_A < dpp->min) dpp->min = dpp->weight_A;
    100. 

  100. #endif
    101. 

  101. 	    out_samples [0] = left;
    102. 

  102. 	    in_samples += dir;
    103. 

  103. 	    out_samples += dir;
    104. 

  104. 	}
    105. 

  105.     }
    106. 

  106. 

  107. #ifdef MINMAX_WEIGHTS
    108. 

  108.     if (dpp->term != 0) {
    109. 

  109. 	if (dpp->max > max_weight) { max_weight = dpp->max; max_term = dpp->term; }
    110. 

  110. 	if (dpp->min < min_weight) { min_weight = dpp->min; min_term = dpp->term; }
    111. 

  111.     }
    112. 

  112. #endif
    113. 

  113. 

  114.     if (m && dpp->term > 0 && dpp->term <= MAX_TERM) {
    115. 

  115. 	int32_t temp_A [MAX_TERM];
    116. 

  116. 	int k;
    117. 

  117. 

  118. 	memcpy (temp_A, dpp->samples_A, sizeof (dpp->samples_A));
    119. 

  119. 

  120. 	for (k = 0; k < MAX_TERM; k++) {
    121. 

  121. 	    dpp->samples_A [k] = temp_A [m];
    122. 

  122. 	    m = (m + 1) & (MAX_TERM - 1);
    123. 

  123. 	}
    124. 

  124.     }
    125. 

  125. }
    126. 

  126. 

  127. static void reverse_mono_decorr (struct decorr_pass *dpp)
    128. 

  128. {
    129. 

  129.     if (dpp->term > MAX_TERM) {
    130. 

  130. 	int32_t sam_A;
    131. 

  131. 

  132. 	if (dpp->term & 1)
    133. 

  133. 	    sam_A = 2 * dpp->samples_A [0] - dpp->samples_A [1];
    134. 

  134. 	else
    135. 

  135. 	    sam_A = (3 * dpp->samples_A [0] - dpp->samples_A [1]) >> 1;
    136. 

  136. 

  137. 	dpp->samples_A [1] = dpp->samples_A [0];
    138. 

  138. 	dpp->samples_A [0] = sam_A;
    139. 

  139. 

  140. 	if (dpp->term & 1)
    141. 

  141. 	    sam_A = 2 * dpp->samples_A [0] - dpp->samples_A [1];
    142. 

  142. 	else
    143. 

  143. 	    sam_A = (3 * dpp->samples_A [0] - dpp->samples_A [1]) >> 1;
    144. 

  144. 

  145. 	dpp->samples_A [1] = sam_A;
    146. 

  146.     }
    147. 

  147.     else if (dpp->term > 1) {
    148. 

  148. 	int i = 0, j = dpp->term - 1, cnt = dpp->term / 2;
    149. 

  149. 

  150. 	while (cnt--) {
    151. 

  151. 	    i &= (MAX_TERM - 1);
    152. 

  152. 	    j &= (MAX_TERM - 1);
    153. 

  153. 	    dpp->samples_A [i] ^= dpp->samples_A [j];
    154. 

  154. 	    dpp->samples_A [j] ^= dpp->samples_A [i];
    155. 

  155. 	    dpp->samples_A [i++] ^= dpp->samples_A [j--];
    156. 

  156. 	}
    157. 

  157. 

  158. 	CLEAR (dpp->samples_A);
    159. 

  159.     }
    160. 

  160. }
    161. 

  161. 

  162. static void decorr_mono_buffer (int32_t *samples, int32_t *outsamples, uint32_t num_samples, struct decorr_pass *dpp)
    163. 

  163. {
    164. 

  164.     int delta = dpp->delta, pre_delta, term = dpp->term;
    165. 

  165.     struct decorr_pass dp;
    166. 

  166. 

  167.     if (delta == 7)
    168. 

  168. 	pre_delta = 7;
    169. 

  169.     else if (delta < 2)
    170. 

  170. 	pre_delta = 3;
    171. 

  171.     else
    172. 

  172. 	pre_delta = delta + 1;
    173. 

  173. 

  174.     CLEAR (dp);
    175. 

  175.     dp.term = term;
    176. 

  176.     dp.delta = pre_delta;
    177. 

  177.     decorr_mono_pass (samples, outsamples, num_samples > 2048 ? 2048 : num_samples, &dp, -1);
    178. 

  178.     dp.delta = delta;
    179. 

  179.     reverse_mono_decorr (&dp);
    180. 

  180.     memcpy (dpp->samples_A, dp.samples_A, sizeof (dp.samples_A));
    181. 

  181.     dpp->weight_A = dp.weight_A;
    182. 

  182. 

  183.     if (delta == 0) {
    184. 

  184. 	dp.delta = 1;
    185. 

  185. 	decorr_mono_pass (samples, outsamples, num_samples, &dp, 1);
    186. 

  186. 	dp.delta = 0;
    187. 

  187. 	memcpy (dp.samples_A, dpp->samples_A, sizeof (dp.samples_A));
    188. 

  188. 	dpp->weight_A = dp.weight_A = dp.sum_A / num_samples;
    189. 

  189.     }
    190. 

  190. 

  191. //    if (memcmp (dpp, &dp, sizeof (dp)))
    192. 

  192. //	error_line ("decorr_passes don't match, delta = %d", delta);
    193. 

  193. 

  194.     decorr_mono_pass (samples, outsamples, num_samples, &dp, 1);
    195. 

  195. }
    196. 

  196. 

  197. static void recurse_mono (WavpackContext *wpc, int32_t *sampleptrs[], struct decorr_pass dps[],
    198. 

  198.     int depth, int nterms, int delta, uint32_t input_bits, uint32_t *best_bits)
    199. 

  199. {
    200. 

  200.     WavpackStream *wps = wpc->streams [wpc->current_stream];
    201. 

  201.     int term, branches = ((wpc->config.extra_flags & EXTRA_BRANCHES) >> 6) - depth;
    202. 

  202.     int32_t *samples, *outsamples;
    203. 

  203.     uint32_t term_bits [22], bits;
    204. 

  204. 

  205.     if (branches < 1 || depth + 1 == nterms)
    206. 

  206. 	branches = 1;
    207. 

  207. 

  208.     CLEAR (term_bits);
    209. 

  209.     samples = sampleptrs [depth];
    210. 

  210.     outsamples = sampleptrs [depth + 1];
    211. 

  211. 

  212.     for (term = 1; term <= 18; ++term) {
    213. 

  213. 	if (term == 17 && branches == 1 && depth + 1 < nterms)
    214. 

  214. 	    continue;
    215. 

  215. 

  216. 	if (term >= 9 && term <= 16)
    217. 

  217. 	    if (term > MAX_TERM || !(wpc->config.flags & CONFIG_HIGH_FLAG) || (wpc->config.extra_flags & EXTRA_SKIP_8TO16))
    218. 

  218. 		continue;
    219. 

  219. 

  220. 	if ((wpc->config.flags & CONFIG_FAST_FLAG) && (term >= 5 && term <= 16))
    221. 

  221. 	    continue;
    222. 

  222. 

  223. 	dps [depth].term = term;
    224. 

  224. 	dps [depth].delta = delta;
    225. 

  225. 	decorr_mono_buffer (samples, outsamples, wps->wphdr.block_samples, &dps [depth]);
    226. 

  226. 	bits = log2buffer (outsamples, wps->wphdr.block_samples);
    227. 

  227. 

  228. 	if (bits < *best_bits) {
    229. 

  229. 	    *best_bits = bits;
    230. 

  230. 	    CLEAR (wps->decorr_passes);
    231. 

  231. 	    memcpy (wps->decorr_passes, dps, sizeof (dps [0]) * (depth + 1));
    232. 

  232. 	    memcpy (sampleptrs [nterms + 1], sampleptrs [depth + 1], wps->wphdr.block_samples * 4);
    233. 

  233. 	}
    234. 

  234. 

  235. 	term_bits [term + 3] = bits;
    236. 

  236.     }
    237. 

  237. 

  238.     while (depth + 1 < nterms && branches--) {
    239. 

  239. 	uint32_t local_best_bits = input_bits;
    240. 

  240. 	int best_term = 0, i;
    241. 

  241. 

  242. 	for (i = 0; i < 22; ++i)
    243. 

  243. 	    if (term_bits [i] && term_bits [i] < local_best_bits) {
    244. 

  244. 		local_best_bits = term_bits [i];
    245. 

  245. 		term_bits [i] = 0;
    246. 

  246. 		best_term = i - 3;
    247. 

  247. 	    }
    248. 

  248. 

  249. 	if (!best_term)
    250. 

  250. 	    break;
    251. 

  251. 

  252. 	dps [depth].term = best_term;
    253. 

  253. 	dps [depth].delta = delta;
    254. 

  254. 	decorr_mono_buffer (samples, outsamples, wps->wphdr.block_samples, &dps [depth]);
    255. 

  255. 

  256. //	if (log2buffer (outsamples, wps->wphdr.block_samples * 2) != local_best_bits)
    257. 

  257. //	    error_line ("data doesn't match!");
    258. 

  258. 

  259. 	recurse_mono (wpc, sampleptrs, dps, depth + 1, nterms, delta, local_best_bits, best_bits);
    260. 

  260.     }
    261. 

  261. }
    262. 

  262. 

  263. static void delta_mono (WavpackContext *wpc, int32_t *sampleptrs[], struct decorr_pass dps[],
    264. 

  264.     int nterms, uint32_t *best_bits)
    265. 

  265. {
    266. 

  266.     WavpackStream *wps = wpc->streams [wpc->current_stream];
    267. 

  267.     int lower = FALSE, delta, d;
    268. 

  268.     uint32_t bits;
    269. 

  269. 

  270.     if (wps->decorr_passes [0].term)
    271. 

  271. 	delta = wps->decorr_passes [0].delta;
    272. 

  272.     else
    273. 

  273. 	return;
    274. 

  274. 

  275.     for (d = delta - 1; d >= 0; --d) {
    276. 

  276. 	int i;
    277. 

  277. 

  278. 	if (!d && (wps->wphdr.flags & HYBRID_FLAG))
    279. 

  279. 	    break;
    280. 

  280. 

  281. 	for (i = 0; i < nterms && wps->decorr_passes [i].term; ++i) {
    282. 

  282. 	    dps [i].term = wps->decorr_passes [i].term;
    283. 

  283. 	    dps [i].delta = d;
    284. 

  284. 	    decorr_mono_buffer (sampleptrs [i], sampleptrs [i+1], wps->wphdr.block_samples, &dps [i]);
    285. 

  285. 	}
    286. 

  286. 

  287. 	bits = log2buffer (sampleptrs [i], wps->wphdr.block_samples);
    288. 

  288. 

  289. 	if (bits < *best_bits) {
    290. 

  290. 	    lower = TRUE;
    291. 

  291. 	    *best_bits = bits;
    292. 

  292. 	    CLEAR (wps->decorr_passes);
    293. 

  293. 	    memcpy (wps->decorr_passes, dps, sizeof (dps [0]) * i);
    294. 

  294. 	    memcpy (sampleptrs [nterms + 1], sampleptrs [i], wps->wphdr.block_samples * 4);
    295. 

  295. 	}
    296. 

  296. 	else
    297. 

  297. 	    break;
    298. 

  298.     }
    299. 

  299. 

  300.     for (d = delta + 1; !lower && d <= 7; ++d) {
    301. 

  301. 	int i;
    302. 

  302. 

  303. 	for (i = 0; i < nterms && wps->decorr_passes [i].term; ++i) {
    304. 

  304. 	    dps [i].term = wps->decorr_passes [i].term;
    305. 

  305. 	    dps [i].delta = d;
    306. 

  306. 	    decorr_mono_buffer (sampleptrs [i], sampleptrs [i+1], wps->wphdr.block_samples, &dps [i]);
    307. 

  307. 	}
    308. 

  308. 

  309. 	bits = log2buffer (sampleptrs [i], wps->wphdr.block_samples);
    310. 

  310. 

  311. 	if (bits < *best_bits) {
    312. 

  312. 	    *best_bits = bits;
    313. 

  313. 	    CLEAR (wps->decorr_passes);
    314. 

  314. 	    memcpy (wps->decorr_passes, dps, sizeof (dps [0]) * i);
    315. 

  315. 	    memcpy (sampleptrs [nterms + 1], sampleptrs [i], wps->wphdr.block_samples * 4);
    316. 

  316. 	}
    317. 

  317. 	else
    318. 

  318. 	    break;
    319. 

  319.     }
    320. 

  320. }
    321. 

  321. 

  322. static void sort_mono (WavpackContext *wpc, int32_t *sampleptrs[], struct decorr_pass dps[],
    323. 

  323.     int nterms, uint32_t *best_bits)
    324. 

  324. {
    325. 

  325.     WavpackStream *wps = wpc->streams [wpc->current_stream];
    326. 

  326.     int reversed = TRUE;
    327. 

  327.     uint32_t bits;
    328. 

  328. 

  329.     while (reversed) {
    330. 

  330. 	int ri, i;
    331. 

  331. 

  332. 	memcpy (dps, wps->decorr_passes, sizeof (wps->decorr_passes));
    333. 

  333. 	reversed = FALSE;
    334. 

  334. 

  335. 	for (ri = 0; ri < nterms && wps->decorr_passes [ri].term; ++ri) {
    336. 

  336. 

  337. 	    if (ri + 1 >= nterms || !wps->decorr_passes [ri+1].term)
    338. 

  338. 		break;
    339. 

  339. 

  340. 	    if (wps->decorr_passes [ri].term == wps->decorr_passes [ri+1].term) {
    341. 

  341. 		decorr_mono_buffer (sampleptrs [ri], sampleptrs [ri+1], wps->wphdr.block_samples, &dps [ri]);
    342. 

  342. 		continue;
    343. 

  343. 	    }
    344. 

  344. 

  345. 	    dps [ri] = wps->decorr_passes [ri+1];
    346. 

  346. 	    dps [ri+1] = wps->decorr_passes [ri];
    347. 

  347. 

  348. 	    for (i = ri; i < nterms && wps->decorr_passes [i].term; ++i)
    349. 

  349. 		decorr_mono_buffer (sampleptrs [i], sampleptrs [i+1], wps->wphdr.block_samples, &dps [i]);
    350. 

  350. 

  351. 	    bits = log2buffer (sampleptrs [i], wps->wphdr.block_samples);
    352. 

  352. 

  353. 	    if (bits < *best_bits) {
    354. 

  354. 		reversed = TRUE;
    355. 

  355. 		*best_bits = bits;
    356. 

  356. 		CLEAR (wps->decorr_passes);
    357. 

  357. 		memcpy (wps->decorr_passes, dps, sizeof (dps [0]) * i);
    358. 

  358. 		memcpy (sampleptrs [nterms + 1], sampleptrs [i], wps->wphdr.block_samples * 4);
    359. 

  359. 	    }
    360. 

  360. 	    else {
    361. 

  361. 		dps [ri] = wps->decorr_passes [ri];
    362. 

  362. 		dps [ri+1] = wps->decorr_passes [ri+1];
    363. 

  363. 		decorr_mono_buffer (sampleptrs [ri], sampleptrs [ri+1], wps->wphdr.block_samples, &dps [ri]);
    364. 

  364. 	    }
    365. 

  365. 	}
    366. 

  366.     }
    367. 

  367. }
    368. 

  368. 

  369. #define EXTRA_ADVANCED (EXTRA_BRANCHES | EXTRA_SORT_FIRST | EXTRA_SORT_LAST | EXTRA_TRY_DELTAS)
    370. 

  370. 

  371. void analyze_mono (WavpackContext *wpc, int32_t *samples)
    372. 

  372. {
    373. 

  373.     WavpackStream *wps = wpc->streams [wpc->current_stream];
    374. 

  374. #ifdef EXTRA_DUMP
    375. 

  375.     uint32_t bits, best_bits, default_bits, cnt;
    376. 

  376. #else
    377. 

  377.     uint32_t bits, best_bits, cnt;
    378. 

  378. #endif
    379. 

  379.     const char *decorr_terms = default_terms, *tp;
    380. 

  380.     int32_t *sampleptrs [MAX_NTERMS+2], *lptr;
    381. 

  381.     struct decorr_pass dps [MAX_NTERMS];
    382. 

  382.     int nterms, i;
    383. 

  383. 

  384.     CLEAR (wps->decorr_passes);
    385. 

  385.     cnt = wps->wphdr.block_samples;
    386. 

  386.     lptr = samples;
    387. 

  387. 

  388.     while (cnt--)
    389. 

  389. 	if (*lptr++)
    390. 

  390. 	    break;
    391. 

  391. 

  392.     if (cnt == (uint32_t) -1) {
    393. 

  393. 	scan_word (wps, samples, wps->wphdr.block_samples, -1);
    394. 

  394. 	wps->num_terms = 0;
    395. 

  395. 	return;
    396. 

  396.     }
    397. 

  397. 

  398.     if (wpc->config.flags & CONFIG_HIGH_FLAG)
    399. 

  399. 	decorr_terms = high_terms;
    400. 

  400.     else if (wpc->config.flags & CONFIG_FAST_FLAG)
    401. 

  401. 	decorr_terms = fast_terms;
    402. 

  402. 

  403.     for (nterms = 0, tp = decorr_terms; *tp; tp++)
    404. 

  404. 	if (*tp > 0)
    405. 

  405. 	    ++nterms;
    406. 

  406. 

  407.     if (wpc->config.extra_flags & EXTRA_TERMS)
    408. 

  408. 	if ((nterms += (wpc->config.extra_flags & EXTRA_TERMS) >> 10) > MAX_NTERMS)
    409. 

  409. 	    nterms = MAX_NTERMS;
    410. 

  410. 

  411.     for (i = 0; i < nterms + 2; ++i)
    412. 

  412. 	sampleptrs [i] = malloc (wps->wphdr.block_samples * 4);
    413. 

  413. 

  414.     memcpy (sampleptrs [nterms + 1], samples, wps->wphdr.block_samples * 4);
    415. 

  415.     best_bits = log2buffer (sampleptrs [nterms + 1], wps->wphdr.block_samples);
    416. 

  416.     memcpy (sampleptrs [0], samples, wps->wphdr.block_samples * 4);
    417. 

  417.     CLEAR (dps);
    418. 

  418. 

  419.     for (tp = decorr_terms, i = 0; *tp; tp++)
    420. 

  420. 	if (*tp > 0) {
    421. 

  421. 	    dps [i].term = *tp;
    422. 

  422. 	    dps [i].delta = 2;
    423. 

  423. 	    decorr_mono_buffer (sampleptrs [i], sampleptrs [i+1], wps->wphdr.block_samples, &dps [i]);
    424. 

  424. 	    ++i;
    425. 

  425. 	}
    426. 

  426. 

  427. #ifdef EXTRA_DUMP
    428. 

  428.     default_bits = bits = log2buffer (sampleptrs [i], wps->wphdr.block_samples);
    429. 

  429. #else
    430. 

  430.     bits = log2buffer (sampleptrs [i], wps->wphdr.block_samples);
    431. 

  431. #endif
    432. 

  432. 

  433.     if (bits < best_bits) {
    434. 

  434. 	best_bits = bits;
    435. 

  435. 	CLEAR (wps->decorr_passes);
    436. 

  436. 	memcpy (wps->decorr_passes, dps, sizeof (dps [0]) * i);
    437. 

  437. 	memcpy (sampleptrs [nterms + 1], sampleptrs [i], wps->wphdr.block_samples * 4);
    438. 

  438.     }
    439. 

  439. 

  440.     if ((wps->wphdr.flags & HYBRID_FLAG) && (wpc->config.extra_flags & EXTRA_ADVANCED)) {
    441. 

  441. 	int shaping_weight, new = wps->wphdr.flags & NEW_SHAPING;
    442. 

  442. 	int32_t *rptr = sampleptrs [nterms + 1], error = 0, temp;
    443. 

  443. 

  444. 	scan_word (wps, rptr, wps->wphdr.block_samples, -1);
    445. 

  445. 	cnt = wps->wphdr.block_samples;
    446. 

  446. 	lptr = sampleptrs [0];
    447. 

  447. 

  448. 	if (wps->wphdr.flags & HYBRID_SHAPE) {
    449. 

  449. 	    while (cnt--) {
    450. 

  450. 		shaping_weight = (wps->dc.shaping_acc [0] += wps->dc.shaping_delta [0]) >> 16;
    451. 

  451. 		temp = -apply_weight (shaping_weight, error);
    452. 

  452. 

  453. 		if (new && shaping_weight < 0 && temp) {
    454. 

  454. 		    if (temp == error)
    455. 

  455. 			temp = (temp < 0) ? temp + 1 : temp - 1;
    456. 

  456. 

  457. 		    lptr [0] += (error = nosend_word (wps, rptr [0], 0) - rptr [0] + temp);
    458. 

  458. 		}
    459. 

  459. 		else
    460. 

  460. 		    lptr [0] += (error = nosend_word (wps, rptr [0], 0) - rptr [0]) + temp;
    461. 

  461. 

  462. 		lptr++;
    463. 

  463. 		rptr++;
    464. 

  464. 	    }
    465. 

  465. 

  466. 	    wps->dc.shaping_acc [0] -= wps->dc.shaping_delta [0] * wps->wphdr.block_samples;
    467. 

  467. 	}
    468. 

  468. 	else
    469. 

  469. 	    while (cnt--) {
    470. 

  470. 		lptr [0] += nosend_word (wps, rptr [0], 0) - rptr [0];
    471. 

  471. 		lptr++;
    472. 

  472. 		rptr++;
    473. 

  473. 	    }
    474. 

  474. 

  475. 	memcpy (dps, wps->decorr_passes, sizeof (dps));
    476. 

  476. 

  477. 	for (i = 0; i < nterms && dps [i].term; ++i)
    478. 

  478. 	    decorr_mono_buffer (sampleptrs [i], sampleptrs [i + 1], wps->wphdr.block_samples, dps + i);
    479. 

  479. 

  480. #ifdef EXTRA_DUMP
    481. 

  481. 	best_bits = default_bits = log2buffer (sampleptrs [i], wps->wphdr.block_samples);
    482. 

  482. #else
    483. 

  483. 	best_bits = log2buffer (sampleptrs [i], wps->wphdr.block_samples);
    484. 

  484. #endif
    485. 

  485. 

  486. 	CLEAR (wps->decorr_passes);
    487. 

  487. 	memcpy (wps->decorr_passes, dps, sizeof (dps [0]) * i);
    488. 

  488. 	memcpy (sampleptrs [nterms + 1], sampleptrs [i], wps->wphdr.block_samples * 4);
    489. 

  489.     }
    490. 

  490. 

  491.     if (wpc->config.extra_flags & EXTRA_BRANCHES)
    492. 

  492. 	recurse_mono (wpc, sampleptrs, dps, 0, nterms, (int) floor (wps->delta_decay + 0.5),
    493. 

  493. 	    log2buffer (sampleptrs [0], wps->wphdr.block_samples), &best_bits);
    494. 

  494. 

  495.     if (wpc->config.extra_flags & EXTRA_SORT_FIRST)
    496. 

  496. 	sort_mono (wpc, sampleptrs, dps, nterms, &best_bits);
    497. 

  497. 

  498.     if (wpc->config.extra_flags & EXTRA_TRY_DELTAS) {
    499. 

  499. 	delta_mono (wpc, sampleptrs, dps, nterms, &best_bits);
    500. 

  500. 

  501. 	if ((wpc->config.extra_flags & EXTRA_ADJUST_DELTAS) && wps->decorr_passes [0].term)
    502. 

  502. 	    wps->delta_decay = (wps->delta_decay * 2.0 + wps->decorr_passes [0].delta) / 3.0;
    503. 

  503. 	else
    504. 

  504. 	    wps->delta_decay = 2.0;
    505. 

  505.     }
    506. 

  506. 

  507.     if (wpc->config.extra_flags & EXTRA_SORT_LAST)
    508. 

  508. 	sort_mono (wpc, sampleptrs, dps, nterms, &best_bits);
    509. 

  509. 

  510. #if 0
    511. 

  511.     memcpy (dps, wps->decorr_passes, sizeof (dps));
    512. 

  512. 

  513.     for (i = 0; i < nterms && dps [i].term; ++i)
    514. 

  514. 	decorr_mono_pass (sampleptrs [i], sampleptrs [i + 1], wps->wphdr.block_samples, dps + i, 1);
    515. 

  515. 

  516.     if (log2buffer (sampleptrs [i], wps->wphdr.block_samples) != best_bits)
    517. 

  517. 	error_line ("(1) samples do not match!");
    518. 

  518. 

  519.     if (log2buffer (sampleptrs [nterms + 1], wps->wphdr.block_samples) != best_bits)
    520. 

  520. 	error_line ("(2) samples do not match!");
    521. 

  521. #endif
    522. 

  522. 

  523.     scan_word (wps, sampleptrs [nterms + 1], wps->wphdr.block_samples, -1);
    524. 

  524. 

  525. #ifdef EXTRA_DUMP
    526. 

  526.     if (wpc->config.extra_flags & EXTRA_DUMP_TERMS) {
    527. 

  527. 	char string [256], substring [20];
    528. 

  528. 	int i;
    529. 

  529. 

  530. 	sprintf (string, "M: delta = %.4f%%, terms =",
    531. 

  531. 	    ((double) best_bits - default_bits) / 256.0 / wps->wphdr.block_samples / 32.0 * 100.0);
    532. 

  532. 

  533. 	for (i = 0; i < nterms; ++i) {
    534. 

  534. 	    if (wps->decorr_passes [i].term) {
    535. 

  535. 		if (i && wps->decorr_passes [i-1].delta == wps->decorr_passes [i].delta)
    536. 

  536. 		    sprintf (substring, " %d", wps->decorr_passes [i].term);
    537. 

  537. 		else
    538. 

  538. 		    sprintf (substring, " %d->%d", wps->decorr_passes [i].term,
    539. 

  539. 			wps->decorr_passes [i].delta);
    540. 

  540. 	    }
    541. 

  541. 	    else
    542. 

  542. 		sprintf (substring, " *");
    543. 

  543. 

  544. 	    strcat (string, substring);
    545. 

  545. 	}
    546. 

  546. 

  547. 	error_line (string);
    548. 

  548.     }
    549. 

  549. #endif
    550. 

  550. 

  551.     for (i = 0; i < nterms; ++i)
    552. 

  552. 	if (!wps->decorr_passes [i].term)
    553. 

  553. 	    break;
    554. 

  554. 

  555.     wps->num_terms = i;
    556. 

  556. 

  557.     for (i = 0; i < nterms + 2; ++i)
    558. 

  558. 	free (sampleptrs [i]);
    559. 

  559. 

  560. #ifdef MINMAX_WEIGHTS
    561. 

  561.     error_line ("weight range = %ld (%d) to %ld (%d)", min_weight, min_term, max_weight, max_term);
    562. 

  562. #endif
    563. 

  563. }
    564.