1 files changed, 171 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libwavpack/metadata.c b/lib/rbcodec/codecs/libwavpack/metadata.c
new file mode 100644
index 0000000000..4dce10100f
--- /dev/null
+++ b/lib/rbcodec/codecs/libwavpack/metadata.c
@@ -0,0 +1,171 @@
+////////////////////////////////////////////////////////////////////////////
+//                           **** WAVPACK ****                            //
+//                  Hybrid Lossless Wavefile Compressor                   //
+//              Copyright (c) 1998 - 2003 Conifer Software.               //
+//                          All Rights Reserved.                          //
+//      Distributed under the BSD Software License (see license.txt)      //
+////////////////////////////////////////////////////////////////////////////
+
+// metadata.c
+
+// This module handles the metadata structure introduced in WavPack 4.0
+
+#include "wavpack.h"
+
+#include <string.h>
+
+int read_metadata_buff (WavpackContext *wpc, WavpackMetadata *wpmd)
+{
+    uint32_t bytes_to_read;
+    uchar tchar;
+
+    if (wpc->stream.block_bytes_left < 2 || !wpc->infile (&wpmd->id, 1) || !wpc->infile (&tchar, 1))
+        return FALSE;
+
+    wpmd->byte_length = tchar << 1;
+    wpc->stream.block_bytes_left -= 2;
+
+    if (wpmd->id & ID_LARGE) {
+        wpmd->id &= ~ID_LARGE;
+
+        if (wpc->stream.block_bytes_left < 2 || !wpc->infile (&tchar, 1))
+            return FALSE;
+
+        wpmd->byte_length += (int32_t) tchar << 9; 
+
+        if (!wpc->infile (&tchar, 1))
+            return FALSE;
+
+        wpmd->byte_length += (int32_t) tchar << 17;
+        wpc->stream.block_bytes_left -= 2;
+    }
+
+    if ((wpc->stream.block_bytes_left -= wpmd->byte_length) < 0)
+        return FALSE;
+
+    if (wpmd->id & ID_ODD_SIZE) {
+        wpmd->id &= ~ID_ODD_SIZE;
+        wpmd->byte_length--;
+    }
+
+    if (!wpmd->byte_length || wpmd->id == ID_WV_BITSTREAM) {
+        wpmd->data = NULL;
+        return TRUE;
+    }
+
+    bytes_to_read = wpmd->byte_length + (wpmd->byte_length & 1);
+
+    if (bytes_to_read > sizeof (wpc->read_buffer)) {
+        wpmd->data = NULL;
+
+        while (bytes_to_read > sizeof (wpc->read_buffer))
+            if (wpc->infile (wpc->read_buffer, sizeof (wpc->read_buffer)) == sizeof (wpc->read_buffer))
+                bytes_to_read -= sizeof (wpc->read_buffer);
+            else
+                return FALSE;
+    }
+    else
+        wpmd->data = wpc->read_buffer;
+
+    if (bytes_to_read && wpc->infile (wpc->read_buffer, bytes_to_read) != (int32_t) bytes_to_read) {
+        wpmd->data = NULL;
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+int process_metadata (WavpackContext *wpc, WavpackMetadata *wpmd)
+{
+    WavpackStream *wps = &wpc->stream;
+
+    switch (wpmd->id) {
+        case ID_DUMMY:
+            return TRUE;
+
+        case ID_DECORR_TERMS:
+            return read_decorr_terms (wps, wpmd);
+
+        case ID_DECORR_WEIGHTS:
+            return read_decorr_weights (wps, wpmd);
+
+        case ID_DECORR_SAMPLES:
+            return read_decorr_samples (wps, wpmd);
+
+        case ID_ENTROPY_VARS:
+            return read_entropy_vars (wps, wpmd);
+
+        case ID_HYBRID_PROFILE:
+            return read_hybrid_profile (wps, wpmd);
+
+        case ID_FLOAT_INFO:
+            return read_float_info (wps, wpmd);
+
+        case ID_INT32_INFO:
+            return read_int32_info (wps, wpmd);
+
+        case ID_CHANNEL_INFO:
+            return read_channel_info (wpc, wpmd);
+
+        case ID_SAMPLE_RATE:
+            return read_sample_rate (wpc, wpmd);
+
+        case ID_CONFIG_BLOCK:
+            return read_config_info (wpc, wpmd);
+
+        case ID_WV_BITSTREAM:
+            return init_wv_bitstream (wpc, wpmd);
+
+        case ID_SHAPING_WEIGHTS:
+        case ID_WVC_BITSTREAM:
+        case ID_WVX_BITSTREAM:
+            return TRUE;
+
+        default:
+            return (wpmd->id & ID_OPTIONAL_DATA) ? TRUE : FALSE;
+    }
+}
+
+int copy_metadata (WavpackMetadata *wpmd, uchar *buffer_start, uchar *buffer_end)
+{
+    uint32_t mdsize = wpmd->byte_length + (wpmd->byte_length & 1);
+    WavpackHeader *wphdr = (WavpackHeader *) buffer_start;
+
+    if (wpmd->byte_length & 1)
+        ((char *) wpmd->data) [wpmd->byte_length] = 0;
+
+    mdsize += (wpmd->byte_length > 510) ? 4 : 2;
+    buffer_start += wphdr->ckSize + 8;
+
+    if (buffer_start + mdsize >= buffer_end)
+        return FALSE;
+
+    buffer_start [0] = wpmd->id | (wpmd->byte_length & 1 ? ID_ODD_SIZE : 0);
+    buffer_start [1] = (wpmd->byte_length + 1) >> 1;
+
+    if (wpmd->byte_length > 510) {
+        buffer_start [0] |= ID_LARGE;
+        buffer_start [2] = (wpmd->byte_length + 1) >> 9;
+        buffer_start [3] = (wpmd->byte_length + 1) >> 17;
+    }
+
+    if (wpmd->data && wpmd->byte_length) {
+        if (wpmd->byte_length > 510) {
+            buffer_start [0] |= ID_LARGE;
+            buffer_start [2] = (wpmd->byte_length + 1) >> 9;
+            buffer_start [3] = (wpmd->byte_length + 1) >> 17;
+            memcpy (buffer_start + 4, wpmd->data, mdsize - 4);
+        }
+        else
+            memcpy (buffer_start + 2, wpmd->data, mdsize - 2);
+    }
+
+    wphdr->ckSize += mdsize;
+    return TRUE;
+}
+
+void free_metadata (WavpackMetadata *wpmd)
+{
+    wpmd->data = NULL;
+}
+