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-rw-r--r--src/decoder/mad_plugin.c34
1 files changed, 28 insertions, 6 deletions
diff --git a/src/decoder/mad_plugin.c b/src/decoder/mad_plugin.c
index c6b9d32d3..1ef7183fa 100644
--- a/src/decoder/mad_plugin.c
+++ b/src/decoder/mad_plugin.c
@@ -350,11 +350,11 @@ parse_id3_replay_gain_info(struct id3_tag *tag)
}
#endif
-#ifdef HAVE_ID3TAG
static void mp3_parse_id3(struct mp3_data *data, size_t tagsize,
struct tag **mpd_tag,
struct replay_gain_info **replay_gain_info_r)
{
+#ifdef HAVE_ID3TAG
struct id3_tag *id3_tag = NULL;
id3_length_t count;
id3_byte_t const *id3_data;
@@ -418,8 +418,34 @@ static void mp3_parse_id3(struct mp3_data *data, size_t tagsize,
id3_tag_delete(id3_tag);
g_free(allocated);
-}
+#else /* !HAVE_ID3TAG */
+ (void)mpd_tag;
+ (void)replay_gain_info_r;
+
+ /* This code is enabled when libid3tag is disabled. Instead
+ of parsing the ID3 frame, it just skips it. */
+
+ mad_stream_skip(&data->stream, tagsize);
#endif
+}
+
+#ifndef HAVE_ID3TAG
+/**
+ * This function emulates libid3tag when it is disabled. Instead of
+ * doing a real analyzation of the frame, it just checks whether the
+ * frame begins with the string "ID3". If so, it returns the full
+ * length.
+ */
+static signed long
+id3_tag_query(const void *p0, size_t length)
+{
+ const char *p = p0;
+
+ return length > 3 && memcmp(p, "ID3", 3) == 0
+ ? length
+ : 0;
+}
+#endif /* !HAVE_ID3TAG */
static enum mp3_action
decode_next_frame_header(struct mp3_data *data, G_GNUC_UNUSED struct tag **tag,
@@ -433,7 +459,6 @@ decode_next_frame_header(struct mp3_data *data, G_GNUC_UNUSED struct tag **tag,
return DECODE_BREAK;
}
if (mad_header_decode(&data->frame.header, &data->stream)) {
-#ifdef HAVE_ID3TAG
if ((data->stream).error == MAD_ERROR_LOSTSYNC &&
(data->stream).this_frame) {
signed long tagsize = id3_tag_query((data->stream).
@@ -454,7 +479,6 @@ decode_next_frame_header(struct mp3_data *data, G_GNUC_UNUSED struct tag **tag,
return DECODE_CONT;
}
}
-#endif
if (MAD_RECOVERABLE((data->stream).error)) {
return DECODE_SKIP;
} else {
@@ -493,7 +517,6 @@ decodeNextFrame(struct mp3_data *data)
return DECODE_BREAK;
}
if (mad_frame_decode(&data->frame, &data->stream)) {
-#ifdef HAVE_ID3TAG
if ((data->stream).error == MAD_ERROR_LOSTSYNC) {
signed long tagsize = id3_tag_query((data->stream).
this_frame,
@@ -506,7 +529,6 @@ decodeNextFrame(struct mp3_data *data)
return DECODE_CONT;
}
}
-#endif
if (MAD_RECOVERABLE((data->stream).error)) {
return DECODE_SKIP;
} else {