Move the get_chunk and the get_header functions from vss.c to afh.c.

[paraslash.git] / afh_common.c

diff --git a/afh_common.c b/afh_common.c
index 3fa88f14e7015c42b4c2adadaf1977ccc790f774..4f84334c8486d48aee712f6099fd72e847b78af5 100644 (file)
--- a/afh_common.c
+++ b/afh_common.c
@@ -176,3 +176,33 @@ 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, 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, char **buf, size_t *len)
+{
+       if (!map || !afhi || ! afhi->header_len) {
+               *buf = NULL;
+               *len = 0;
+       }
+       *len = afhi->header_len;
+       *buf = map + afhi->header_offset;
+}