X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=ogg_afh.c;h=29f08965077be97b6015208bb16cd8e8ef2d270c;hp=debc0c9f3dec6e9416bf42ea52a0e3c05ff6d6e6;hb=2b12fc963d15219721dd23eb7947bf516f2ad574;hpb=a731a7c6e78fb137268b42062d9fb08b4e49a2c8

diff --git a/ogg_afh.c b/ogg_afh.c
index debc0c9f..29f08965 100644
--- a/ogg_afh.c
+++ b/ogg_afh.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2004-2014 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2004 Andre Noll <maan@tuebingen.mpg.de>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -20,6 +20,20 @@ struct private_vorbis_data {
 	vorbis_comment vc;
 };
 
+/*
+ * Vorbis uses three header packets, all of which are required: the
+ * identification header, the comments header, and the setup header.
+ *
+ * The identification header identifies the bitstream as Vorbis. It contains
+ * the Vorbis version and simple audio characteristics of the stream such as
+ * sample rate and number of channels.
+ *
+ * The comment header includes user text comments (tags) and a vendor string
+ * for the application/library that produced the bitstream.
+ *
+ * The setup header includes extensive CODEC setup information as well as the
+ * complete VQ and Huffman codebooks needed for decoding.
+ */
 static int vorbis_packet_callback(ogg_packet *packet, int packet_num,
 		__a_unused int serial, struct afh_info *afhi, void *private_data)
 {
@@ -157,7 +171,41 @@ fail:
 	PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 }
 
-static const char* ogg_suffixes[] = {"ogg", NULL};
+static int vorbis_make_meta_packet(struct taginfo *tags, ogg_packet *result)
+{
+	vorbis_comment vc;
+	int ret;
+
+	vorbis_comment_init(&vc);
+	vorbis_comment_add_tag(&vc, "artist", tags->artist);
+	vorbis_comment_add_tag(&vc, "title", tags->title);
+	vorbis_comment_add_tag(&vc, "album", tags->album);
+	vorbis_comment_add_tag(&vc, "year", tags->year);
+	vorbis_comment_add_tag(&vc, "comment", tags->comment);
+	ret = vorbis_commentheader_out(&vc, result);
+	vorbis_comment_clear(&vc);
+	if (ret != 0)
+		return -E_VORBIS_COMMENTHEADER;
+	return 1;
+}
+
+static int vorbis_rewrite_tags(const char *map, size_t mapsize,
+		struct taginfo *tags, int output_fd,
+		__a_unused const char *filename)
+{
+	int ret;
+	ogg_packet packet;
+
+	ret = vorbis_make_meta_packet(tags, &packet);
+	if (ret < 0)
+		return ret;
+	ret = ogg_rewrite_tags(map, mapsize, output_fd, (char *)packet.packet,
+		packet.bytes);
+	free(packet.packet);
+	return ret;
+}
+
+static const char * const ogg_suffixes[] = {"ogg", NULL};
 
 /**
  * The init function of the ogg vorbis audio format handler.
@@ -169,4 +217,5 @@ void ogg_init(struct audio_format_handler *afh)
 	afh->get_file_info = ogg_vorbis_get_file_info;
 	afh->get_header = vorbis_get_header;
 	afh->suffixes = ogg_suffixes;
+	afh->rewrite_tags = vorbis_rewrite_tags;
 }