Initial import of libwavpack

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6056 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 105 insertions, 0 deletions

diff --git a/apps/codecs/libwavpack/metadata.c b/apps/codecs/libwavpack/metadata.c
new file mode 100644
index 0000000000..40ede99cd4
--- /dev/null
+++ b/apps/codecs/libwavpack/metadata.c
@@ -0,0 +1,105 @@
+////////////////////////////////////////////////////////////////////////////
+//                           **** 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"
+
+int read_metadata_buff (WavpackContext *wpc, WavpackMetadata *wpmd)
+{
+    uchar tchar;
+
+    if (!wpc->infile (&wpmd->id, 1) || !wpc->infile (&tchar, 1))
+        return FALSE;
+
+    wpmd->byte_length = tchar << 1;
+
+    if (wpmd->id & ID_LARGE) {
+        wpmd->id &= ~ID_LARGE;
+
+        if (!wpc->infile (&tchar, 1))
+            return FALSE;
+
+        wpmd->byte_length += (long) tchar << 9; 
+
+        if (!wpc->infile (&tchar, 1))
+            return FALSE;
+
+        wpmd->byte_length += (long) tchar << 17;
+    }
+
+    if (wpmd->id & ID_ODD_SIZE) {
+        wpmd->id &= ~ID_ODD_SIZE;
+        wpmd->byte_length--;
+    }
+
+    if (wpmd->byte_length && wpmd->byte_length <= sizeof (wpc->read_buffer)) {
+        ulong bytes_to_read = wpmd->byte_length + (wpmd->byte_length & 1);
+
+        if (wpc->infile (wpc->read_buffer, bytes_to_read) != (long) bytes_to_read) {
+            wpmd->data = NULL;
+            return FALSE;
+        }
+
+        wpmd->data = wpc->read_buffer;
+    }
+    else
+        wpmd->data = NULL;
+
+    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_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;
+    }
+}