Update libwavpack to the latest stream specification

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9763 a1c6a512-1295-4272-9138-f99709370657

4 files changed, 51 insertions, 29 deletions

diff --git a/apps/codecs/libwavpack/unpack.c b/apps/codecs/libwavpack/unpack.c
index dcc9bf5bf9..5bb4467440 100644
--- a/apps/codecs/libwavpack/unpack.c
+++ b/apps/codecs/libwavpack/unpack.c
@@ -128,7 +128,7 @@ int read_decorr_weights (WavpackStream *wps, WavpackMetadata *wpmd)
     signed char *byteptr = wpmd->data;
     struct decorr_pass *dpp;
 
-    if (!(wps->wphdr.flags & MONO_FLAG))
+    if (!(wps->wphdr.flags & MONO_DATA))
         termcnt /= 2;
 
     if (termcnt > wps->num_terms)
@@ -140,7 +140,7 @@ int read_decorr_weights (WavpackStream *wps, WavpackMetadata *wpmd)
     while (--dpp >= wps->decorr_passes && termcnt--) {
         dpp->weight_A = restore_weight (*byteptr++);
 
-        if (!(wps->wphdr.flags & MONO_FLAG))
+        if (!(wps->wphdr.flags & MONO_DATA))
             dpp->weight_B = restore_weight (*byteptr++);
     }
 
@@ -170,7 +170,7 @@ int read_decorr_samples (WavpackStream *wps, WavpackMetadata *wpmd)
     if (wps->wphdr.version == 0x402 && (wps->wphdr.flags & HYBRID_FLAG)) {
         byteptr += 2;
 
-        if (!(wps->wphdr.flags & MONO_FLAG))
+        if (!(wps->wphdr.flags & MONO_DATA))
             byteptr += 2;
     }
 
@@ -180,7 +180,7 @@ int read_decorr_samples (WavpackStream *wps, WavpackMetadata *wpmd)
             dpp->samples_A [1] = exp2s ((short)(byteptr [2] + (byteptr [3] << 8)));
             byteptr += 4;
 
-            if (!(wps->wphdr.flags & MONO_FLAG)) {
+            if (!(wps->wphdr.flags & MONO_DATA)) {
                 dpp->samples_B [0] = exp2s ((short)(byteptr [0] + (byteptr [1] << 8)));
                 dpp->samples_B [1] = exp2s ((short)(byteptr [2] + (byteptr [3] << 8)));
                 byteptr += 4;
@@ -198,7 +198,7 @@ int read_decorr_samples (WavpackStream *wps, WavpackMetadata *wpmd)
                 dpp->samples_A [m] = exp2s ((short)(byteptr [0] + (byteptr [1] << 8)));
                 byteptr += 2;
 
-                if (!(wps->wphdr.flags & MONO_FLAG)) {
+                if (!(wps->wphdr.flags & MONO_DATA)) {
                     dpp->samples_B [m] = exp2s ((short)(byteptr [0] + (byteptr [1] << 8)));
                     byteptr += 2;
                 }
@@ -322,7 +322,7 @@ int32_t unpack_samples (WavpackContext *wpc, int32_t *buffer, uint32_t sample_co
 
     ///////////////////// handle version 4 mono data /////////////////////////
 
-    if (flags & MONO_FLAG) {
+    if (flags & MONO_DATA) {
         eptr = buffer + sample_count;
         i = get_words (buffer, sample_count, flags, &wps->w, &wps->wvbits);
 
@@ -394,9 +394,20 @@ int32_t unpack_samples (WavpackContext *wpc, int32_t *buffer, uint32_t sample_co
     fixup_samples (wps, buffer, i);
 
     if (flags & FLOAT_DATA)
-        float_normalize (buffer, (flags & MONO_FLAG) ? i : i * 2,
+        float_normalize (buffer, (flags & MONO_DATA) ? i : i * 2,
             127 - wps->float_norm_exp + wpc->norm_offset);
 
+    if (flags & FALSE_STEREO) {
+        int32_t *dptr = buffer + i * 2;
+        int32_t *sptr = buffer + i;
+        int32_t c = i;
+
+        while (c--) {
+            *--dptr = *--sptr;
+            *--dptr = *sptr;
+        }
+    }
+
     wps->sample_index += i;
     wps->crc = crc;
 
@@ -695,12 +706,12 @@ static void fixup_samples (WavpackStream *wps, int32_t *buffer, uint32_t sample_
     shift += 21 - (flags & BYTES_STORED) * 8;   // this provides RockBox with 28-bit (+sign)
 
     if (flags & FLOAT_DATA) {
-        float_values (wps, buffer, (flags & MONO_FLAG) ? sample_count : sample_count * 2);
+        float_values (wps, buffer, (flags & MONO_DATA) ? sample_count : sample_count * 2);
         return;
     }
 
     if (flags & INT32_DATA) {
-        uint32_t count = (flags & MONO_FLAG) ? sample_count : sample_count * 2;
+        uint32_t count = (flags & MONO_DATA) ? sample_count : sample_count * 2;
         int sent_bits = wps->int32_sent_bits, zeros = wps->int32_zeros;
         int ones = wps->int32_ones, dups = wps->int32_dups;
         int32_t *dptr = buffer;
@@ -721,7 +732,7 @@ static void fixup_samples (WavpackStream *wps, int32_t *buffer, uint32_t sample_
     }
 
     if (shift > 0) {
-        if (!(flags & MONO_FLAG))
+        if (!(flags & MONO_DATA))
             sample_count *= 2;
 
         while (sample_count--)
@@ -730,7 +741,7 @@ static void fixup_samples (WavpackStream *wps, int32_t *buffer, uint32_t sample_
     else if (shift < 0) {
         shift = -shift;
 
-        if (!(flags & MONO_FLAG))
+        if (!(flags & MONO_DATA))
             sample_count *= 2;
 
         while (sample_count--)
diff --git a/apps/codecs/libwavpack/wavpack.h b/apps/codecs/libwavpack/wavpack.h
index 593af7831d..3128328e49 100644
--- a/apps/codecs/libwavpack/wavpack.h
+++ b/apps/codecs/libwavpack/wavpack.h
@@ -76,11 +76,19 @@ typedef struct {
 #define SRATE_LSB       23
 #define SRATE_MASK      (0xfL << SRATE_LSB)
 
+#define FALSE_STEREO    0x40000000      // block is stereo, but data is mono
+
 #define IGNORED_FLAGS   0x18000000      // reserved, but ignore if encountered
 #define NEW_SHAPING     0x20000000      // use IIR filter for negative shaping
-#define UNKNOWN_FLAGS   0xC0000000      // also reserved, but refuse decode if
+#define UNKNOWN_FLAGS   0x80000000      // also reserved, but refuse decode if
                                         //  encountered
 
+#define MONO_DATA (MONO_FLAG | FALSE_STEREO)
+
+#define MIN_STREAM_VERS     0x402       // lowest stream version we'll decode
+#define MAX_STREAM_VERS     0x410       // highest stream version we'll decode
+#define CUR_STREAM_VERS     0x403       // stream version we are writing now
+
 //////////////////////////// WavPack Metadata /////////////////////////////////
 
 // This is an internal representation of metadata.
@@ -426,5 +434,6 @@ void WavpackAddWrapper (WavpackContext *wpc, void *data, uint32_t bcount);
 int WavpackStartBlock (WavpackContext *wpc, uchar *begin, uchar *end);
 int WavpackPackSamples (WavpackContext *wpc, int32_t *sample_buffer, uint32_t sample_count);
 uint32_t WavpackFinishBlock (WavpackContext *wpc);
-
+void WavpackUpdateNumSamples (WavpackContext *wpc, void *first_block);
+void *WavpackGetWrapperLocation (void *first_block);
 
diff --git a/apps/codecs/libwavpack/words.c b/apps/codecs/libwavpack/words.c
index ccbd77f8f9..c7a8047d03 100644
--- a/apps/codecs/libwavpack/words.c
+++ b/apps/codecs/libwavpack/words.c
@@ -151,14 +151,14 @@ int read_entropy_vars (WavpackStream *wps, WavpackMetadata *wpmd)
 {
     uchar *byteptr = wpmd->data;
 
-    if (wpmd->byte_length != ((wps->wphdr.flags & MONO_FLAG) ? 6 : 12))
+    if (wpmd->byte_length != ((wps->wphdr.flags & MONO_DATA) ? 6 : 12))
         return FALSE;
 
     wps->w.c [0].median [0] = exp2s (byteptr [0] + (byteptr [1] << 8));
     wps->w.c [0].median [1] = exp2s (byteptr [2] + (byteptr [3] << 8));
     wps->w.c [0].median [2] = exp2s (byteptr [4] + (byteptr [5] << 8));
 
-    if (!(wps->wphdr.flags & MONO_FLAG)) {
+    if (!(wps->wphdr.flags & MONO_DATA)) {
         wps->w.c [1].median [0] = exp2s (byteptr [6] + (byteptr [7] << 8));
         wps->w.c [1].median [1] = exp2s (byteptr [8] + (byteptr [9] << 8));
         wps->w.c [1].median [2] = exp2s (byteptr [10] + (byteptr [11] << 8));
@@ -215,7 +215,7 @@ int read_hybrid_profile (WavpackStream *wps, WavpackMetadata *wpmd)
         wps->w.c [0].slow_level = exp2s (byteptr [0] + (byteptr [1] << 8));
         byteptr += 2;
 
-        if (!(wps->wphdr.flags & MONO_FLAG)) {
+        if (!(wps->wphdr.flags & MONO_DATA)) {
             wps->w.c [1].slow_level = exp2s (byteptr [0] + (byteptr [1] << 8));
             byteptr += 2;
         }
@@ -224,7 +224,7 @@ int read_hybrid_profile (WavpackStream *wps, WavpackMetadata *wpmd)
     wps->w.bitrate_acc [0] = (int32_t)(byteptr [0] + (byteptr [1] << 8)) << 16;
     byteptr += 2;
 
-    if (!(wps->wphdr.flags & MONO_FLAG)) {
+    if (!(wps->wphdr.flags & MONO_DATA)) {
         wps->w.bitrate_acc [1] = (int32_t)(byteptr [0] + (byteptr [1] << 8)) << 16;
         byteptr += 2;
     }
@@ -233,7 +233,7 @@ int read_hybrid_profile (WavpackStream *wps, WavpackMetadata *wpmd)
         wps->w.bitrate_delta [0] = exp2s ((short)(byteptr [0] + (byteptr [1] << 8)));
         byteptr += 2;
 
-        if (!(wps->wphdr.flags & MONO_FLAG)) {
+        if (!(wps->wphdr.flags & MONO_DATA)) {
             wps->w.bitrate_delta [1] = exp2s ((short)(byteptr [0] + (byteptr [1] << 8)));
             byteptr += 2;
         }
@@ -257,7 +257,7 @@ void update_error_limit (struct words_data *w, uint32_t flags)
 {
     int bitrate_0 = (w->bitrate_acc [0] += w->bitrate_delta [0]) >> 16;
 
-    if (flags & MONO_FLAG) {
+    if (flags & MONO_DATA) {
         if (flags & HYBRID_BITRATE) {
             int slow_log_0 = (w->c [0].slow_level + SLO) >> SLS;
 
@@ -326,13 +326,13 @@ int32_t get_words (int32_t *buffer, int nsamples, uint32_t flags,
     register struct entropy_data *c = w->c;
     int csamples;
 
-    if (!(flags & MONO_FLAG))
+    if (!(flags & MONO_DATA))
         nsamples *= 2;
 
     for (csamples = 0; csamples < nsamples; ++csamples) {
         uint32_t ones_count, low, mid, high;
 
-        if (!(flags & MONO_FLAG))
+        if (!(flags & MONO_DATA))
             c = w->c + (csamples & 1);
 
         if (!(w->c [0].median [0] & ~1) && !w->holding_zero && !w->holding_one && !(w->c [1].median [0] & ~1)) {
@@ -435,7 +435,7 @@ int32_t get_words (int32_t *buffer, int nsamples, uint32_t flags,
             w->holding_zero = ~w->holding_one & 1;
         }
 
-        if ((flags & HYBRID_FLAG) && ((flags & MONO_FLAG) || !(csamples & 1)))
+        if ((flags & HYBRID_FLAG) && ((flags & MONO_DATA) || !(csamples & 1)))
             update_error_limit (w, flags);
 
         if (ones_count == 0) {
@@ -484,7 +484,7 @@ int32_t get_words (int32_t *buffer, int nsamples, uint32_t flags,
             c->slow_level = c->slow_level - ((c->slow_level + SLO) >> SLS) + mylog2 (mid);
     }
 
-    return (flags & MONO_FLAG) ? csamples : (csamples / 2);
+    return (flags & MONO_DATA) ? csamples : (csamples / 2);
 }
 
 // Read a single unsigned value from the specified bitstream with a value
diff --git a/apps/codecs/libwavpack/wputils.c b/apps/codecs/libwavpack/wputils.c
index 7a6cc44ad4..7fabc7ab34 100644
--- a/apps/codecs/libwavpack/wputils.c
+++ b/apps/codecs/libwavpack/wputils.c
@@ -69,9 +69,10 @@ WavpackContext *WavpackOpenFileInput (read_stream infile, char *error)
             return NULL;
         }
 
-        if ((wps->wphdr.flags & UNKNOWN_FLAGS) || wps->wphdr.version < 0x402 || wps->wphdr.version > 0x40f) {
-            strcpy_loc (error, "invalid WavPack file!");
-            return NULL;
+        if ((wps->wphdr.flags & UNKNOWN_FLAGS) || wps->wphdr.version < MIN_STREAM_VERS ||
+            wps->wphdr.version > MAX_STREAM_VERS) {
+                strcpy_loc (error, "invalid WavPack file!");
+                return NULL;
         }
 
         if (wps->wphdr.block_samples && wps->wphdr.total_samples != (uint32_t) -1)
@@ -170,7 +171,7 @@ uint32_t WavpackUnpackSamples (WavpackContext *wpc, int32_t *buffer, uint32_t sa
                 if (bcount == (uint32_t) -1)
                     break;
 
-                if (wps->wphdr.version < 0x402 || wps->wphdr.version > 0x40f) {
+                if (wps->wphdr.version < MIN_STREAM_VERS || wps->wphdr.version > MAX_STREAM_VERS) {
                     strcpy_loc (wpc->error_message, "invalid WavPack file!");
                     break;
                 }
@@ -341,7 +342,8 @@ static uint32_t read_next_header (read_stream infile, WavpackHeader *wphdr)
         sp = buffer;
 
         if (*sp++ == 'w' && *sp == 'v' && *++sp == 'p' && *++sp == 'k' &&
-            !(*++sp & 1) && sp [2] < 16 && !sp [3] && sp [5] == 4 && sp [4] >= 2 && sp [4] <= 0xf) {
+            !(*++sp & 1) && sp [2] < 16 && !sp [3] && sp [5] == 4 &&
+            sp [4] >= (MIN_STREAM_VERS & 0xff) && sp [4] <= (MAX_STREAM_VERS & 0xff)) {
                 memcpy (wphdr, buffer, sizeof (*wphdr));
                 little_endian_to_native (wphdr, WavpackHeaderFormat);
                 return bytes_skipped;
@@ -452,7 +454,7 @@ int WavpackSetConfiguration (WavpackContext *wpc, WavpackConfig *config, uint32_
     memcpy (wps->wphdr.ckID, "wvpk", 4);
     wps->wphdr.ckSize = sizeof (WavpackHeader) - 8;
     wps->wphdr.total_samples = wpc->total_samples;
-    wps->wphdr.version = 0x403;
+    wps->wphdr.version = CUR_STREAM_VERS;
     wps->wphdr.flags = flags;
 
     pack_init (wpc);