X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=afh_common.c;h=f57ca89fb4b4afc8d7387269d97c0dd1630fddd5;hp=a1ea3c72ef49c2d5e538fe2a59a47670b164b238;hb=39bb1a102b14e3f230a659290622b2d1b1658b44;hpb=a6e79f02b6eab623425686f8f3cab5bc942e77d4

diff --git a/afh_common.c b/afh_common.c
index a1ea3c72..f57ca89f 100644
--- a/afh_common.c
+++ b/afh_common.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1997-2008 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -75,6 +75,9 @@ static inline int next_audio_format(int format)
 /** Iterate over each supported audio format. */
 #define FOR_EACH_AUDIO_FORMAT(i) for (i = 0; afl[i].name; i = next_audio_format(i))
 
+/**
+ * Call the init function of each supported audio format handler.
+ */
 void afh_init(void)
 {
 	int i;
@@ -116,7 +119,7 @@ int guess_audio_format(const char *name)
 			return i;
 		}
 	}
-	return -E_BAD_AUDIO_FILE_SUFFIX;
+	return -1;
 }
 
 /**
@@ -140,7 +143,11 @@ int guess_audio_format(const char *name)
 int compute_afhi(const char *path, char *data, size_t size,
 		struct afh_info *afhi)
 {
-	int ret, i, format = guess_audio_format(path);
+	int ret, i, format;
+
+	afhi->header_offset = 0;
+	afhi->header_len = 0;
+	format = guess_audio_format(path);
 
 	if (format >= 0) {
 		ret = afl[format].get_file_info(data, size, afhi);
@@ -153,7 +160,7 @@ int compute_afhi(const char *path, char *data, size_t size,
 		ret = afl[i].get_file_info(data, size, afhi);
 		if (ret >= 0)
 			return i;
-		PARA_WARNING_LOG("%s\n", PARA_STRERROR(-ret));
+		PARA_WARNING_LOG("%s\n", para_strerror(-ret));
 	}
 	return -E_AUDIO_FORMAT;
 }
@@ -173,3 +180,33 @@ const char *audio_format_name(int i)
 	return i >= 0?  afl[i].name : "(none)";
 }
 
+
+void afh_get_chunk(long unsigned chunk_num, struct afh_info *afhi,
+		void *map, const char **buf, size_t *len)
+{
+	size_t pos = afhi->chunk_table[chunk_num];
+	*buf = map + pos;
+	*len = afhi->chunk_table[chunk_num + 1] - pos;
+}
+
+/**
+ * Get the header of an audio file.
+ *
+ * \param afhi The audio file handler data describing the file.
+ * \param map The data of the audio file.
+ * \param buf The length of the header is stored here.
+ * \param len Points to a buffer containing the header on return.
+ *
+ * This function sets \a buf to \p NULL and \a len to zero if \a map or \a
+ * afhi is \p NULL, or if the current audio format does not need special
+ * header treamtment.
+ */
+void afh_get_header(struct afh_info *afhi, void *map, const char **buf, size_t *len)
+{
+	if (!map || !afhi || ! afhi->header_len) {
+		*buf = NULL;
+		*len = 0;
+	}
+	*len = afhi->header_len;
+	*buf = map + afhi->header_offset;
+}