Added lossless encoding to WavPack library. Also made a few changes to

decoding stuff in preparation for future optimization and eliminated all tabs.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7009 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 91 insertions, 45 deletions

diff --git a/apps/codecs/libwavpack/metadata.c b/apps/codecs/libwavpack/metadata.c
index 661b25e..ebc7dcf 100644
--- a/apps/codecs/libwavpack/metadata.c
+++ b/apps/codecs/libwavpack/metadata.c
@@ -12,46 +12,48 @@
 
 #include "wavpack.h"
 
+#include <string.h>
+
 int read_metadata_buff (WavpackContext *wpc, WavpackMetadata *wpmd)
 {
     uchar tchar;
 
     if (!wpc->infile (&wpmd->id, 1) || !wpc->infile (&tchar, 1))
-	return FALSE;
+        return FALSE;
 
     wpmd->byte_length = tchar << 1;
 
     if (wpmd->id & ID_LARGE) {
-	wpmd->id &= ~ID_LARGE;
+        wpmd->id &= ~ID_LARGE;
 
-	if (!wpc->infile (&tchar, 1))
-	    return FALSE;
+        if (!wpc->infile (&tchar, 1))
+            return FALSE;
 
-	wpmd->byte_length += (long) tchar << 9; 
+        wpmd->byte_length += (long) tchar << 9; 
 
-	if (!wpc->infile (&tchar, 1))
-	    return FALSE;
+        if (!wpc->infile (&tchar, 1))
+            return FALSE;
 
-	wpmd->byte_length += (long) tchar << 17;
+        wpmd->byte_length += (long) tchar << 17;
     }
 
     if (wpmd->id & ID_ODD_SIZE) {
-	wpmd->id &= ~ID_ODD_SIZE;
-	wpmd->byte_length--;
+        wpmd->id &= ~ID_ODD_SIZE;
+        wpmd->byte_length--;
     }
 
     if (wpmd->byte_length && wpmd->byte_length <= (long)sizeof (wpc->read_buffer)) {
-	ulong bytes_to_read = wpmd->byte_length + (wpmd->byte_length & 1);
+        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;
-	}
+        if (wpc->infile (wpc->read_buffer, bytes_to_read) != (long) bytes_to_read) {
+            wpmd->data = NULL;
+            return FALSE;
+        }
 
-	wpmd->data = wpc->read_buffer;
+        wpmd->data = wpc->read_buffer;
     }
     else
-	wpmd->data = NULL;
+        wpmd->data = NULL;
 
     return TRUE;
 }
@@ -61,45 +63,89 @@ int process_metadata (WavpackContext *wpc, WavpackMetadata *wpmd)
     WavpackStream *wps = &wpc->stream;
 
     switch (wpmd->id) {
-	case ID_DUMMY:
-	    return TRUE;
+        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_DECORR_TERMS:
-	    return read_decorr_terms (wps, wpmd);
+        case ID_HYBRID_PROFILE:
+            return read_hybrid_profile (wps, wpmd);
 
-	case ID_DECORR_WEIGHTS:
-	    return read_decorr_weights (wps, wpmd);
+        case ID_FLOAT_INFO:
+            return read_float_info (wps, wpmd);
 
-	case ID_DECORR_SAMPLES:
-	    return read_decorr_samples (wps, wpmd);
+        case ID_INT32_INFO:
+            return read_int32_info (wps, wpmd);
 
-	case ID_ENTROPY_VARS:
-	    return read_entropy_vars (wps, wpmd);
+        case ID_CHANNEL_INFO:
+            return read_channel_info (wpc, wpmd);
 
-	case ID_HYBRID_PROFILE:
-	    return read_hybrid_profile (wps, 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;
+    }
+}
 
-	case ID_FLOAT_INFO:
-	    return read_float_info (wps, wpmd);
+int copy_metadata (WavpackMetadata *wpmd, uchar *buffer_start, uchar *buffer_end)
+{
+    ulong mdsize = wpmd->byte_length + (wpmd->byte_length & 1);
+    WavpackHeader *wphdr = (WavpackHeader *) buffer_start;
 
-	case ID_INT32_INFO:
-	    return read_int32_info (wps, wpmd);
+    if (wpmd->byte_length & 1)
+        ((char *) wpmd->data) [wpmd->byte_length] = 0;
 
-	case ID_CHANNEL_INFO:
-	    return read_channel_info (wpc, wpmd);
+    mdsize += (wpmd->byte_length > 510) ? 4 : 2;
+    buffer_start += wphdr->ckSize + 8;
 
-	case ID_CONFIG_BLOCK:
-	    return read_config_info (wpc, wpmd);
+    if (buffer_start + mdsize >= buffer_end)
+        return FALSE;
 
-	case ID_WV_BITSTREAM:
-	    return init_wv_bitstream (wpc, wpmd);
+    buffer_start [0] = wpmd->id | (wpmd->byte_length & 1 ? ID_ODD_SIZE : 0);
+    buffer_start [1] = (wpmd->byte_length + 1) >> 1;
 
-	case ID_SHAPING_WEIGHTS:
-	case ID_WVC_BITSTREAM:
-	case ID_WVX_BITSTREAM:
-	    return TRUE;
+    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;
+    }
 
-	default:
-	    return (wpmd->id & ID_OPTIONAL_DATA) ? TRUE : FALSE;
+    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;
+}
+