1 files changed, 65 insertions, 7 deletions

diff --git a/src/decoder/dsdlib.c b/src/decoder/dsdlib.c
index 3df9497c..d3043fb0 100644
--- a/src/decoder/dsdlib.c
+++ b/src/decoder/dsdlib.c
@@ -27,12 +27,18 @@
 #include "dsf_decoder_plugin.h"
 #include "decoder_api.h"
 #include "util/bit_reverse.h"
+#include "tag_handler.h"
+#include "tag_id3.h"
 #include "dsdlib.h"
 #include "dsdiff_decoder_plugin.h"
 
 #include <unistd.h>
 #include <stdio.h> /* for SEEK_SET, SEEK_CUR */
 
+#ifdef HAVE_ID3TAG
+#include <id3tag.h>
+#endif
+
 bool
 dsdlib_id_equals(const struct dsdlib_id *id, const char *s)
 {
@@ -58,24 +64,24 @@ bool
 dsdlib_skip_to(struct decoder *decoder, struct input_stream *is,
 	       goffset offset)
 {
-	if (is->seekable)
+	if (input_stream_is_seekable(is))
 		return input_stream_seek(is, offset, SEEK_SET, NULL);
 
-	if (is->offset > offset)
+	if (input_stream_get_offset(is) > offset)
 		return false;
 
 	char buffer[8192];
-	while (is->offset < offset) {
+	while (input_stream_get_offset(is) < offset) {
 		size_t length = sizeof(buffer);
-		if (offset - is->offset < (goffset)length)
-			length = offset - is->offset;
+		if (offset - input_stream_get_offset(is) < (goffset)length)
+			length = offset - input_stream_get_offset(is);
 
 		size_t nbytes = decoder_read(decoder, is, buffer, length);
 		if (nbytes == 0)
 			return false;
 	}
 
-	assert(is->offset == offset);
+	assert(input_stream_get_offset(is) == offset);
 	return true;
 }
 
@@ -91,7 +97,7 @@ dsdlib_skip(struct decoder *decoder, struct input_stream *is,
 	if (delta == 0)
 		return true;
 
-	if (is->seekable)
+	if (input_stream_is_seekable(is))
 		return input_stream_seek(is, delta, SEEK_CUR, NULL);
 
 	char buffer[8192];
@@ -110,3 +116,55 @@ dsdlib_skip(struct decoder *decoder, struct input_stream *is,
 	return true;
 }
 
+/**
+ * Add tags from ID3 tag. All tags commonly found in the ID3 tags of
+ * DSF and DSDIFF files are imported
+ */
+
+#ifdef HAVE_ID3TAG
+void
+dsdlib_tag_id3(struct input_stream *is,
+	       const struct tag_handler *handler,
+	       void *handler_ctx, goffset tagoffset)
+{
+	assert(tagoffset >= 0);
+
+	if (tagoffset == 0)
+		return;
+
+	if (!dsdlib_skip_to(NULL, is, tagoffset))
+		return;
+
+	struct id3_tag *id3_tag = NULL;
+	id3_length_t count;
+
+	/* Prevent broken files causing problems */
+	const goffset size = input_stream_get_size(is);
+	const goffset offset = input_stream_get_offset(is);
+	if (offset >= size)
+		return;
+
+	count = size - offset;
+
+	/* Check and limit id3 tag size to prevent a stack overflow */
+	if (count == 0 || count > 4096)
+		return;
+
+	id3_byte_t dsdid3[count];
+	id3_byte_t *dsdid3data;
+	dsdid3data = dsdid3;
+
+	if (!dsdlib_read(NULL, is, dsdid3data, count))
+		return;
+
+	id3_tag = id3_tag_parse(dsdid3data, count);
+	if (id3_tag == NULL)
+		return;
+
+	scan_id3_tag(id3_tag, handler, handler_ctx);
+
+	id3_tag_delete(id3_tag);
+
+	return;
+}
+#endif