diff --git a/adaptive_compress.c b/adaptive_compress.c
index 608e4e9..568006d 100644
--- a/adaptive_compress.c
+++ b/adaptive_compress.c
@@ -130,8 +130,14 @@ adapt_init(void **data, int *level, int nthreads, uint64_t chunksize,
 		adat = (struct adapt_data *)slab_alloc(NULL, sizeof (struct adapt_data));
 		adat->adapt_mode = 1;
 		rv = ppmd_init(&(adat->ppmd_data), level, nthreads, chunksize, file_version, op);
+
+		/*
+		 * LZ4 is used to tackle some embedded archive headers and/or zero paddings in
+		 * otherwise incompressible data. So we always use it at the lowest and fastest
+		 * compression level.
+		 */
 		if (rv == 0)
-			rv = lz4_init(&(adat->lz4_data), level, nthreads, chunksize, file_version, op);
+			rv = lz4_init(&(adat->lz4_data), 1, nthreads, chunksize, file_version, op);
 		adat->lzma_data = NULL;
 		adat->bsc_data = NULL;
 		*data = adat;
@@ -167,8 +173,13 @@ adapt2_init(void **data, int *level, int nthreads, uint64_t chunksize,
 		if (rv == 0)
 			rv = libbsc_init(&(adat->bsc_data), &lv, nthreads, chunksize, file_version, op);
 #endif
+		/*
+		 * LZ4 is used to tackle some embedded archive headers and/or zero paddings in
+		 * otherwise incompressible data. So we always use it at the lowest and fastest
+		 * compression level.
+		 */
 		if (rv == 0)
-			rv = lz4_init(&(adat->lz4_data), level, nthreads, chunksize, file_version, op);
+			rv = lz4_init(&(adat->lz4_data), 1, nthreads, chunksize, file_version, op);
 		*data = adat;
 		if (*level > 9) *level = 9;
 	}
@@ -304,7 +315,7 @@ adapt_decompress(void *src, uint64_t srclen, void *dst,
 	cmp_flags = CHDR_ALGO(chdr);
 
 	if (cmp_flags == ADAPT_COMPRESS_LZ4) {
-		return (lz4_decompress(src, srclen, dst, dstlen, level, chdr, btype, adat->lz4_data));
+		return (lz4_decompress(src, srclen, dst, dstlen, 1, chdr, btype, adat->lz4_data));
 
 	} else if (cmp_flags == ADAPT_COMPRESS_LZMA) {
 		return (lzma_decompress(src, srclen, dst, dstlen, level, chdr, btype, adat->lzma_data));
diff --git a/archive/pc_arc_filter.c b/archive/pc_arc_filter.c
index 1664916..9209bbb 100644
--- a/archive/pc_arc_filter.c
+++ b/archive/pc_arc_filter.c
@@ -43,7 +43,7 @@
 #include "pc_archive.h"
 
 #define	PACKJPG_DEF_BUFSIZ	(512 * 1024)
-#define	JPG_SIZE_LIMIT		(50 * 1024 * 1024)
+#define	JPG_SIZE_LIMIT		(25 * 1024 * 1024)
 
 struct packjpg_filter_data {
 	uchar_t *buff, *in_buff;
@@ -136,7 +136,7 @@ packjpg_filter(struct filter_info *fi, void *filter_private)
 {
 	struct packjpg_filter_data *pjdat = (struct packjpg_filter_data *)filter_private;
 	uchar_t *mapbuf, *out;
-	size_t len, in_size = 0, len1;
+	uint64_t len, in_size = 0, len1;
 
 	len = archive_entry_size(fi->entry);
 	len1 = len;
@@ -157,9 +157,7 @@ packjpg_filter(struct filter_info *fi, void *filter_private)
 			munmap(mapbuf, len);
 			return (FILTER_RETURN_SKIP);
 		}
-
 	} else {
-
 		/*
 		 * Allocate input buffer and read archive data stream for the entry
 		 * into this buffer.
diff --git a/archive/pc_archive.c b/archive/pc_archive.c
index 9a3d013..93ca24a 100644
--- a/archive/pc_archive.c
+++ b/archive/pc_archive.c
@@ -1422,6 +1422,12 @@ out:
 
 /* PPMZ packed into 32-bit integer. */
 #	define	PPMINT	(0x50504d5aU)
+
+/* wvpk packed into 32-bit integer. */
+#	define	WVPK	(0x7776706b)
+
+/* TTA1 packed into 32-bit integer. */
+#	define	TTA1	(0x54544131)
 #else
 /* 0x7fELF packed into 32-bit integer. */
 #	define	ELFINT (0x464c457fU)
@@ -1431,6 +1437,12 @@ out:
 
 /* PPMZ packed into 32-bit integer. */
 #	define	PPMINT	(0x5a4d5050U)
+
+/* wvpk packed into 32-bit integer. */
+#	define	WVPK	(0x6b707677)
+
+/* TTA1 packed into 32-bit integer. */
+#	define	TTA1	(0x31415454)
 #endif
 
 /*
@@ -1452,6 +1464,8 @@ detect_type_by_data(uchar_t *buf, size_t len)
 		return (TYPE_BINARY); // Timezone data
 	if (U32_P(buf) == PPMINT)
 		return (TYPE_BINARY|TYPE_COMPRESSED|TYPE_COMPRESSED_PPMD); // PPM Compressed archive
+	if (U32_P(buf) == WVPK || U32_P(buf) == TTA1)
+		return (TYPE_BINARY|TYPE_COMPRESSED|TYPE_AUDIO_COMPRESSED);
 
 	return (TYPE_UNKNOWN);
 }
diff --git a/pcompress.c b/pcompress.c
index d160a06..abf4bfe 100644
--- a/pcompress.c
+++ b/pcompress.c
@@ -205,44 +205,57 @@ preproc_compress(pc_ctx_t *pctx, compress_func_ptr cmp_func, void *src, uint64_t
 {
 	uchar_t *dest = (uchar_t *)dst, type = 0;
 	int64_t result;
-	uint64_t _dstlen;
+	uint64_t _dstlen, fromlen;
+	uchar_t *from, *to;
 	DEBUG_STAT_EN(double strt, en);
 
 	_dstlen = *dstlen;
+	from = src;
+	to = dst;
+	fromlen = srclen;
+	result = 0;
+
 	if (pctx->lzp_preprocess) {
 		int hashsize;
 
 		hashsize = lzp_hash_size(level);
-		result = lzp_compress((const uchar_t *)src, (uchar_t *)dst, srclen,
+		result = lzp_compress((const uchar_t *)from, to, fromlen,
 				      hashsize, LZP_DEFAULT_LZPMINLEN, 0);
-		if (result < 0 || result == srclen) {
-			if (!pctx->enable_delta2_encode)
-				return (-1);
-		} else {
+		if (result >= 0 && result < srclen) {
+			uchar_t *tmp;
+			tmp = from;
+			from = to;
+			to = tmp;
+			fromlen = result;
 			type |= PREPROC_TYPE_LZP;
-			srclen = result;
-			memcpy(src, dst, srclen);
 		}
-
-	} else if (!pctx->enable_delta2_encode)  {
-		/*
-		 * Execution won't come here but just in case ...
-		 */
-		log_msg(LOG_ERR, 0, "Invalid preprocessing mode");
-		return (-1);
 	}
 
 	if (pctx->enable_delta2_encode && props->delta2_span > 0) {
-		_dstlen = srclen;
-		result = delta2_encode((uchar_t *)src, srclen, (uchar_t *)dst,
+		_dstlen = fromlen;
+		result = delta2_encode((uchar_t *)from, fromlen, to,
 				       &_dstlen, props->delta2_span);
 		if (result != -1) {
-			memcpy(src, dst, _dstlen);
-			srclen = _dstlen;
+			uchar_t *tmp;
+			tmp = from;
+			from = to;
+			to = tmp;
+			fromlen = _dstlen;
 			type |= PREPROC_TYPE_DELTA2;
 		}
 	}
 
+	/*
+	 * Check which is the resulting buffer. If Encoded data is already sitting
+	 * in src buffer then a memcpy() is not needed.
+	 * Note that from,to ptrs are swapped after every encoding stage. So if
+	 * from == dst, it means that encoded data is in dst.
+	 */
+	if (from == dst) {
+		memcpy(src, dst, fromlen);
+	}
+	srclen = fromlen;
+
 	*dest = type;
 	U64_P(dest + 1) = htonll(srclen);
 	_dstlen = srclen;
@@ -305,7 +318,7 @@ preproc_decompress(pc_ctx_t *pctx, compress_func_ptr dec_func, void *src, uint64
 			memcpy(src, dst, _dstlen);
 			srclen = _dstlen;
 			*dstlen = _dstlen;
-	} else {
+		} else {
 			return (result);
 		}
 	}
@@ -819,9 +832,9 @@ start_decompress(pc_ctx_t *pctx, const char *filename, char *to_filename)
 			err = 1;
 			goto uncomp_done;
 		}
+		to_filename = (char *)origf;
 	}
 
-
 	compressed_chunksize = chunksize + CHUNK_HDR_SZ + zlib_buf_extra(chunksize);
 
 	if (pctx->_props_func) {
@@ -1546,7 +1559,7 @@ plain_index:
 		/* Compress data chunk. */
 		if (_chunksize == 0) {
 			rv = -1;
-		} else if ((pctx->lzp_preprocess || pctx->enable_delta2_encode)) {
+		} else if (pctx->preprocess_mode) {
 			rv = preproc_compress(pctx, tdat->compress,
 			    tdat->uncompressed_chunk + dedupe_index_sz, _chunksize,
 			    compressed_chunk + index_size_cmp, &_chunksize, tdat->level, 0,
@@ -1575,7 +1588,7 @@ plain_index:
 		_chunksize += index_size_cmp;
 	} else {
 		_chunksize = tdat->rbytes;
-		if (pctx->lzp_preprocess || pctx->enable_delta2_encode) {
+		if (pctx->preprocess_mode) {
 			rv = preproc_compress(pctx, tdat->compress, tdat->uncompressed_chunk,
 			    tdat->rbytes, compressed_chunk, &_chunksize, tdat->level, 0,
 			    tdat->btype, tdat->data, tdat->props);
@@ -1639,7 +1652,7 @@ plain_index:
 	if ((pctx->enable_rabin_scan || pctx->enable_fixed_scan) && tdat->rctx->valid) {
 		type |= CHUNK_FLAG_DEDUP;
 	}
-	if (pctx->lzp_preprocess || pctx->enable_delta2_encode) {
+	if (pctx->preprocess_mode) {
 		type |= CHUNK_FLAG_PREPROC;
 	}
 
@@ -2689,6 +2702,7 @@ create_pc_context(void)
 	ctx->rab_blk_size = -1;
 	ctx->archive_temp_fd = -1;
 	ctx->pagesize = sysconf(_SC_PAGE_SIZE);
+	ctx->btype = TYPE_UNKNOWN;
 
 	return (ctx);
 }
@@ -3140,7 +3154,9 @@ init_pc_context(pc_ctx_t *pctx, int argc, char *argv[])
 			init_filters(&ff);
 			pctx->enable_packjpg = ff.enable_packjpg;
 		}
-
+		if (pctx->lzp_preprocess || pctx->enable_delta2_encode) {
+			pctx->preprocess_mode = 1;
+		}
 	} else if (pctx->do_uncompress) {
 		struct filter_flags ff;
 		/*
diff --git a/pcompress.h b/pcompress.h
index d9ea44b..45d02bf 100644
--- a/pcompress.h
+++ b/pcompress.h
@@ -58,7 +58,7 @@ extern "C" {
 #define	CHUNK_FLAG_PREPROC	4
 #define	COMP_EXTN	".pz"
 
-#define	PREPROC_TYPE_LZP	1
+#define	PREPROC_TYPE_LZP		1
 #define	PREPROC_TYPE_DELTA2	2
 #define	PREPROC_COMPRESSED	128
 
@@ -203,6 +203,7 @@ typedef struct pc_ctx {
 	int enable_delta2_encode;
 	int enable_rabin_split;
 	int enable_fixed_scan;
+	int preprocess_mode;
 	int lzp_preprocess;
 	int encrypt_type;
 	int archive_mode;
diff --git a/utils/phash/extensions.h b/utils/phash/extensions.h
index 55925e2..c6c765f 100644
--- a/utils/phash/extensions.h
+++ b/utils/phash/extensions.h
@@ -68,11 +68,11 @@ struct ext_entry {
 	{"bib"	, TYPE_TEXT, 3},
 	{"lua"	, TYPE_TEXT, 3},
 	{"qml"	, TYPE_TEXT|TYPE_MARKUP, 3},
-	{"fa"	, TYPE_TEXT, 2},
+	{"fa"	, TYPE_TEXT|TYPE_DNA_SEQ, 2},
 	{"faa"	, TYPE_TEXT, 3},
 	{"asn"	, TYPE_TEXT|TYPE_MARKUP, 3},
-	{"ffn"	, TYPE_TEXT, 3},
-	{"fna"	, TYPE_TEXT, 3},
+	{"ffn"	, TYPE_TEXT|TYPE_DNA_SEQ, 3},
+	{"fna"	, TYPE_TEXT|TYPE_DNA_SEQ, 3},
 	{"frn"	, TYPE_TEXT, 3},
 	{"gbk"	, TYPE_TEXT, 3},
 	{"gff"	, TYPE_TEXT, 3},
@@ -101,6 +101,7 @@ struct ext_entry {
 	{"pdf"	, TYPE_BINARY, 3},
 	{"jpg"	, TYPE_BINARY|TYPE_COMPRESSED|TYPE_JPEG, 3},
 	{"jpeg"	, TYPE_BINARY|TYPE_COMPRESSED|TYPE_JPEG, 4},
+	{"mjpeg"	, TYPE_BINARY|TYPE_COMPRESSED|TYPE_MJPEG, 5},
 	{"png"	, TYPE_BINARY|TYPE_COMPRESSED|TYPE_COMPRESSED_GZ, 3},
 	{"mp3"	, TYPE_BINARY|TYPE_COMPRESSED, 3},
 	{"wma"	, TYPE_BINARY|TYPE_COMPRESSED, 3},
@@ -145,5 +146,11 @@ struct ext_entry {
 	{"pyo"	, TYPE_BINARY, 3},
 	{"pyc"	, TYPE_BINARY, 3},
 	{"wav"	, TYPE_BINARY, 3},
+	{"tta"	, TYPE_BINARY|TYPE_COMPRESSED|TYPE_AUDIO_COMPRESSED, 3},
+	{"wv"	, TYPE_BINARY|TYPE_COMPRESSED|TYPE_AUDIO_COMPRESSED, 2},
+	{"swf"	, TYPE_BINARY, 3},
+	{"SVGZ"	, TYPE_BINARY, 4},
+	{"ODT"	, TYPE_BINARY, 3},
+	{"3DM"	, TYPE_BINARY, 3},
 };
 #endif
diff --git a/utils/phash/extensions.txt b/utils/phash/extensions.txt
index db2785e..ccde73f 100644
--- a/utils/phash/extensions.txt
+++ b/utils/phash/extensions.txt
@@ -57,11 +57,11 @@ lua,TYPE_TEXT
 qml,TYPE_TEXT|TYPE_MARKUP
 
 # These are all genomic data file extensions
-fa,TYPE_TEXT
+fa,TYPE_TEXT|TYPE_DNA_SEQ
 faa,TYPE_TEXT
 asn,TYPE_TEXT|TYPE_MARKUP
-ffn,TYPE_TEXT
-fna,TYPE_TEXT
+ffn,TYPE_TEXT|TYPE_DNA_SEQ
+fna,TYPE_TEXT|TYPE_DNA_SEQ
 frn,TYPE_TEXT
 gbk,TYPE_TEXT
 gff,TYPE_TEXT
@@ -91,6 +91,7 @@ off,TYPE_BINARY|TYPE_EXE
 pdf,TYPE_BINARY
 jpg,TYPE_BINARY|TYPE_COMPRESSED|TYPE_JPEG
 jpeg,TYPE_BINARY|TYPE_COMPRESSED|TYPE_JPEG
+mjpeg,TYPE_BINARY|TYPE_COMPRESSED|TYPE_MJPEG
 png,TYPE_BINARY|TYPE_COMPRESSED|TYPE_COMPRESSED_GZ
 mp3,TYPE_BINARY|TYPE_COMPRESSED
 wma,TYPE_BINARY|TYPE_COMPRESSED
@@ -135,3 +136,9 @@ bmp,TYPE_BINARY
 pyo,TYPE_BINARY
 pyc,TYPE_BINARY
 wav,TYPE_BINARY
+tta,TYPE_BINARY|TYPE_COMPRESSED|TYPE_AUDIO_COMPRESSED
+wv,TYPE_BINARY|TYPE_COMPRESSED|TYPE_AUDIO_COMPRESSED
+swf,TYPE_BINARY
+SVGZ,TYPE_BINARY,TYPE_COMPRESSED|TYPE_COMPRESSED_GZ
+ODT,TYPE_BINARY,TYPE_COMPRESSED|TYPE_COMPRESSED_ZIP
+3DM,TYPE_BINARY
diff --git a/utils/phash/phash.c b/utils/phash/phash.c
index b235b11..3196f2f 100644
--- a/utils/phash/phash.c
+++ b/utils/phash/phash.c
@@ -12,14 +12,14 @@
 
 /* small adjustments to _a_ to make values distinct */
 ub1 tab[] = {
-125,0,0,82,113,0,125,85,113,0,0,7,0,0,125,0,
-0,0,7,87,0,0,82,0,0,125,0,7,0,85,125,85,
-0,113,0,0,85,0,0,113,0,113,124,0,0,125,0,0,
-113,0,11,113,125,7,0,0,0,85,113,85,22,0,0,125,
-0,113,0,0,113,0,82,0,125,111,87,124,69,183,113,0,
-124,0,7,22,120,22,0,127,0,120,51,125,0,0,74,120,
-0,124,87,113,0,127,0,0,11,85,85,146,69,11,183,146,
-0,0,88,0,0,85,42,0,171,0,0,0,0,83,0,0,
+125,0,0,220,235,125,82,0,113,0,0,7,0,0,82,0,
+0,0,7,124,0,0,82,0,0,125,0,7,0,220,125,120,
+0,0,0,0,22,0,0,113,0,113,113,0,0,125,85,0,
+113,0,11,113,125,7,0,0,0,40,0,113,85,0,0,125,
+0,113,0,0,113,0,125,183,40,27,7,15,58,183,113,0,
+124,0,0,22,125,220,0,40,0,87,87,125,113,0,183,125,
+0,125,87,7,0,85,0,0,59,229,85,7,135,116,0,146,
+0,0,82,0,0,0,200,0,56,125,0,0,61,202,0,0,
 };
 
 /* The hash function */
diff --git a/utils/phash/phash.h b/utils/phash/phash.h
index e422e47..aa7445c 100644
--- a/utils/phash/phash.h
+++ b/utils/phash/phash.h
@@ -8,7 +8,7 @@
 
 extern ub1 tab[];
 #define PHASHLEN 0x80  /* length of hash mapping table */
-#define PHASHNKEYS 134  /* How many keys were hashed */
+#define PHASHNKEYS 141  /* How many keys were hashed */
 #define PHASHRANGE 256  /* Range any input might map to */
 #define PHASHSALT 0x9e3779b9 /* internal, initialize normal hash */
 
diff --git a/utils/utils.c b/utils/utils.c
index 6f3a591..d256324 100644
--- a/utils/utils.c
+++ b/utils/utils.c
@@ -572,6 +572,6 @@ is_incompressible(int type)
 	int ic = 0;
 	int st = PC_SUBTYPE(type);
 
-	ic = (st == TYPE_JPEG) | (st == TYPE_PACKJPG);
+	ic = (st == TYPE_JPEG) | (st == TYPE_PACKJPG) | (st == TYPE_AUDIO_COMPRESSED);
 	return (ic);
 }
diff --git a/utils/utils.h b/utils/utils.h
index a4a68ff..973b97d 100644
--- a/utils/utils.h
+++ b/utils/utils.h
@@ -90,9 +90,11 @@ typedef int32_t bsize_t;
 #	if !defined(sun) && !defined (__sun)
 #		define LE64(x) __bswap_64(x)
 #		define LE32(x) __bswap_32(x)
+#		define LE16(x) __bswap_16(x)
 #	else
 #		define LE64(x) BSWAP_64(x)
 #		define LE32(x) BSWAP_32(x)
+#		define LE16(x) BSWAP_16(x)
 #	endif
 #else
 #	if !defined(sun) && !defined (__sun)
@@ -105,6 +107,7 @@ typedef int32_t bsize_t;
 #	endif
 #	define LE64(x) (x)
 #	define LE32(x) (x)
+#	define LE16(x) (x)
 #endif
 
 
@@ -262,7 +265,10 @@ typedef enum {
 	TYPE_COMPRESSED_LZ = 136,
 	TYPE_COMPRESSED_PPMD = 144,
 	TYPE_COMPRESSED_ZPAQ = 152,
-	TYPE_PACKJPG = 160
+	TYPE_PACKJPG = 160,
+	TYPE_DNA_SEQ = 168,
+	TYPE_MJPEG = 176,
+	TYPE_AUDIO_COMPRESSED = 184
 } data_type_t;
 
 /*