X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=ogg_afh_common.h;h=e0cf2d40c3ffb825c9f19338aa792558cb1c8742;hp=89c8268b1fa0335bf98675c89135a7d1531a9630;hb=3685a9093ae12ff9ce02fc58e607eb9b63894443;hpb=92e4a0579a320372d2e94efc7c2a0d9f419e3ffe

diff --git a/ogg_afh_common.h b/ogg_afh_common.h
index 89c8268b..e0cf2d40 100644
--- a/ogg_afh_common.h
+++ b/ogg_afh_common.h
@@ -1,33 +1,41 @@
-/*
- * Copyright (C) 2010-2011 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2010 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
 
 /**
  * \file ogg_afh_common.h Structures and prototypes common to audio format
  * handlers that use the ogg container format.
  */
 
+struct oac_custom_header *oac_custom_header_new(void);
+void oac_custom_header_init(int serial, struct oac_custom_header *h);
+int oac_custom_header_append(ogg_packet *op, struct oac_custom_header *h);
+void oac_custom_header_flush(struct oac_custom_header *h);
+size_t oac_custom_header_get(char **buf, struct oac_custom_header *h);
+
 /**
- * Callback structure provided by vorbis/speex audio format handlers.
+ * Callback structure provided by audio format handlers.
  *
- * Both audio formats utilize the ogg container format. Meta info about
- * the audio file is contained in the first three ogg packets.
+ * All audio formats which utilize the ogg container format define a callback
+ * function whose purpose is to extract the meta information about the audio
+ * file from the first few ogg packets of the bitstream.
  */
-struct ogg_afh_callback_info {
+struct oac_callback_info {
  	/**
-	  * ogg_get_file_info() calls this function for each of the three
-	  * header packets. If this callback returns a negative value, the
-	  * audio file is considered invalid and the chunk table is not
-	  * created. If it returns zero, the end of the header has been
-	  * reached and no further ogg packets should be processed.
-	  */
+	 * ogg_get_file_info() calls this function for the first three ogg
+	 * packets, or until the callback returns a non-positive value. If it
+	 * returns negative, the audio file was not recognized by the audio
+	 * format handler. If it returns zero, the audio file is considered
+	 * valid, and no further processing by the callback is needed. In this
+	 * case the header chunk, i.e. chunk number zero, is defined as the
+	 * concatenation of all packets that have been processed by the
+	 * callback.
+	 */
 	int (*packet_callback)(ogg_packet *packet, int packet_num,
 		int serial, struct afh_info *afhi, void *private_data);
-	/** Vorbis/speex specific data. */
+	/** Data specific to the audio format handler. */
 	void *private_data;
 };
 
-int ogg_get_file_info(char *map, size_t numbytes, struct afh_info *afhi,
-		struct ogg_afh_callback_info *ci);
+int oac_get_file_info(char *map, size_t numbytes, struct afh_info *afhi,
+		struct oac_callback_info *ci);
+int oac_rewrite_tags(const char *map, size_t mapsize, int fd,
+		char *meta_packet, size_t meta_sz);