3    Decompression for chipset version 2 et 3
4    (C) 2004-2006  Luc Saillard (luc@saillard.org)
24  *   0: use a C version of this tests:  {  a<0?0:(a>255?255:a) }
127 				p0[k + 0x10] = (2 * pw) + 0x80;  in build_table_color()
131 				p0[k + 0x50] = (-2 * pw) + 0x80;  in build_table_color()
161  *   if look_bits(2) == 0:	# op == 2 in the lookup table
162  *      skip_bits(2)
181  *   op == 2 when (i%4)==0
258 	{0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3,},
259 	{0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,},
263 	{1, 3, 0, 2, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3, 0, 2,},
264 	{0, 3, 3, 0, 1, 2, 2, 1, 2, 1, 1, 2, 3, 0, 0, 3,},
265 	{0, 1, 2, 3, 3, 2, 1, 0, 3, 2, 1, 0, 0, 1, 2, 3,},
266 	{1, 1, 1, 1, 3, 3, 3, 3, 0, 0, 0, 0, 2, 2, 2, 2,},
270 	{1, 3, 0, 2, 2, 0, 3, 1, 2, 0, 3, 1, 1, 3, 0, 2,},
271 	{1, 2, 2, 1, 3, 0, 0, 3, 0, 3, 3, 0, 2, 1, 1, 2,},
277 static unsigned char pwc_crop_table[256 + 2*MAX_OUTER_CROP_VALUE];
292 	if (pdec->last_cmd_valid && pdec->last_cmd == cmd[2])  in pwc_dec23_init()
296 		flags = cmd[2] & 0x18;  in pwc_dec23_init()
304 		version = cmd[2] >> 5;  in pwc_dec23_init()
310 		flags = cmd[2] & 6;  in pwc_dec23_init()
311 		if (flags == 2)  in pwc_dec23_init()
318 		version = cmd[2] >> 3;  in pwc_dec23_init()
342 	pdec->last_cmd = cmd[2];  in pwc_dec23_init()
353 	const int *c = src;  in copy_image_block_Y()  local
356 	*d++ = cm[c[0] >> scalebits];  in copy_image_block_Y()
357 	*d++ = cm[c[1] >> scalebits];  in copy_image_block_Y()
358 	*d++ = cm[c[2] >> scalebits];  in copy_image_block_Y()
359 	*d++ = cm[c[3] >> scalebits];  in copy_image_block_Y()
362 	*d++ = cm[c[4] >> scalebits];  in copy_image_block_Y()
363 	*d++ = cm[c[5] >> scalebits];  in copy_image_block_Y()
364 	*d++ = cm[c[6] >> scalebits];  in copy_image_block_Y()
365 	*d++ = cm[c[7] >> scalebits];  in copy_image_block_Y()
367 	d = dst + bytes_per_line*2;  in copy_image_block_Y()
368 	*d++ = cm[c[8] >> scalebits];  in copy_image_block_Y()
369 	*d++ = cm[c[9] >> scalebits];  in copy_image_block_Y()
370 	*d++ = cm[c[10] >> scalebits];  in copy_image_block_Y()
371 	*d++ = cm[c[11] >> scalebits];  in copy_image_block_Y()
374 	*d++ = cm[c[12] >> scalebits];  in copy_image_block_Y()
375 	*d++ = cm[c[13] >> scalebits];  in copy_image_block_Y()
376 	*d++ = cm[c[14] >> scalebits];  in copy_image_block_Y()
377 	*d++ = cm[c[15] >> scalebits];  in copy_image_block_Y()
380 	const int *c = src;  in copy_image_block_Y()
382 	for (i = 0; i < 4; i++, c++)  in copy_image_block_Y()
383 		*d++ = CLAMP((*c) >> scalebits);  in copy_image_block_Y()
386 	for (i = 0; i < 4; i++, c++)  in copy_image_block_Y()
387 		*d++ = CLAMP((*c) >> scalebits);  in copy_image_block_Y()
389 	d = dst + bytes_per_line*2;  in copy_image_block_Y()
390 	for (i = 0; i < 4; i++, c++)  in copy_image_block_Y()
391 		*d++ = CLAMP((*c) >> scalebits);  in copy_image_block_Y()
394 	for (i = 0; i < 4; i++, c++)  in copy_image_block_Y()
395 		*d++ = CLAMP((*c) >> scalebits);  in copy_image_block_Y()
408 	const int *c = src;  in copy_image_block_CrCb()  local
411 	*d++ = cm[c[0] >> scalebits];  in copy_image_block_CrCb()
412 	*d++ = cm[c[4] >> scalebits];  in copy_image_block_CrCb()
413 	*d++ = cm[c[1] >> scalebits];  in copy_image_block_CrCb()
414 	*d++ = cm[c[5] >> scalebits];  in copy_image_block_CrCb()
415 	*d++ = cm[c[2] >> scalebits];  in copy_image_block_CrCb()
416 	*d++ = cm[c[6] >> scalebits];  in copy_image_block_CrCb()
417 	*d++ = cm[c[3] >> scalebits];  in copy_image_block_CrCb()
418 	*d++ = cm[c[7] >> scalebits];  in copy_image_block_CrCb()
421 	*d++ = cm[c[12] >> scalebits];  in copy_image_block_CrCb()
422 	*d++ = cm[c[8] >> scalebits];  in copy_image_block_CrCb()
423 	*d++ = cm[c[13] >> scalebits];  in copy_image_block_CrCb()
424 	*d++ = cm[c[9] >> scalebits];  in copy_image_block_CrCb()
425 	*d++ = cm[c[14] >> scalebits];  in copy_image_block_CrCb()
426 	*d++ = cm[c[10] >> scalebits];  in copy_image_block_CrCb()
427 	*d++ = cm[c[15] >> scalebits];  in copy_image_block_CrCb()
428 	*d++ = cm[c[11] >> scalebits];  in copy_image_block_CrCb()
498 	if (look_nbits(pdec,2) == 0) {  in decode_block()
499 		skip_nbits(pdec, 2);  in decode_block()
512 	channel_v = ((channel_v & 1) << 2) | (channel_v & 2) | ((channel_v & 4) >> 2);  in decode_block()
533 		if (op == 2) {  in decode_block()
534 			skip_nbits(pdec, 2);  in decode_block()
550 			nbits = ptable8004[offset1 * 2];  in decode_block()
557 			shift = ptable8004[offset1 * 2 + 1];  in decode_block()
570 			offset1 += hash_table_ops [htable_idx * 4 + 2];  in decode_block()
582 	} while (op != 2);  in decode_block()
618 	/* pass 2: uncompress UV component */  in DecompressBand23()
627 		copy_image_block_CrCb(pdec->temp_colors, planar_u, real_image_width/2, pdec->scalebits);  in DecompressBand23()
630 		copy_image_block_CrCb(pdec->temp_colors, planar_v, real_image_width/2, pdec->scalebits);  in DecompressBand23()
634 		nblocks -= 2;  in DecompressBand23()