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-rw-r--r--src/Makefile.am3
-rw-r--r--src/icy_metadata.c175
-rw-r--r--src/icy_metadata.h98
3 files changed, 275 insertions, 1 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index 399534da8..e89905bf2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -37,6 +37,7 @@ mpd_headers = \
input_stream.h \
input_file.h \
input_curl.h \
+ icy_metadata.h \
client.h \
dlist.h \
listen.h \
@@ -264,7 +265,7 @@ endif
if HAVE_CURL
-mpd_SOURCES += input_curl.c
+mpd_SOURCES += input_curl.c icy_metadata.c
endif
diff --git a/src/icy_metadata.c b/src/icy_metadata.c
new file mode 100644
index 000000000..5049d2805
--- /dev/null
+++ b/src/icy_metadata.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2003-2008 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "icy_metadata.h"
+#include "tag.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+
+void
+icy_deinit(struct icy_metadata *im)
+{
+ if (!icy_defined(im))
+ return;
+
+ if (im->data_rest == 0 && im->meta_size > 0)
+ g_free(im->meta_data);
+
+ if (im->tag != NULL)
+ tag_free(im->tag);
+}
+
+void
+icy_reset(struct icy_metadata *im)
+{
+ if (!icy_defined(im))
+ return;
+
+ icy_deinit(im);
+
+ im->data_rest = im->data_size;
+ im->meta_size = 0;
+}
+
+size_t
+icy_data(struct icy_metadata *im, size_t length)
+{
+ assert(icy_defined(im));
+ assert(length > 0);
+
+ if (im->data_rest == 0)
+ return 0;
+
+ if (length >= im->data_rest) {
+ length = im->data_rest;
+ im->data_rest = 0;
+ } else
+ im->data_rest -= length;
+
+ return length;
+}
+
+static void
+icy_add_item(struct tag *tag, enum tag_type type, const char *value)
+{
+ size_t length = strlen(value);
+
+ if (length >= 2 && value[0] == '\'' && value[length - 1] == '\'') {
+ /* strip the single quotes */
+ ++value;
+ length -= 2;
+ }
+
+ if (length > 0)
+ tag_add_item_n(tag, type, value, length);
+}
+
+static void
+icy_parse_tag_item(struct tag *tag, const char *item)
+{
+ gchar **p = g_strsplit(item, "=", 0);
+
+ if (p[0] != NULL && p[1] != NULL) {
+ if (strcmp(p[0], "StreamTitle") == 0)
+ icy_add_item(tag, TAG_ITEM_TITLE, p[1]);
+ else
+ g_debug("unknown icy-tag: '%s'", p[0]);
+ }
+
+ g_strfreev(p);
+}
+
+static struct tag *
+icy_parse_tag(const char *p)
+{
+ struct tag *tag = tag_new();
+ gchar **items = g_strsplit(p, ";", 0);
+
+ for (unsigned i = 0; items[i] != NULL; ++i)
+ icy_parse_tag_item(tag, items[i]);
+
+ g_strfreev(items);
+
+ return tag;
+}
+
+size_t
+icy_meta(struct icy_metadata *im, const void *data, size_t length)
+{
+ const unsigned char *p = data;
+
+ assert(icy_defined(im));
+ assert(im->data_rest == 0);
+ assert(length > 0);
+
+ if (im->meta_size == 0) {
+ /* read meta_size from the first byte of a meta
+ block */
+ im->meta_size = *p++ * 16;
+ if (im->meta_size == 0) {
+ /* special case: no metadata */
+ im->data_rest = im->data_size;
+ return 1;
+ }
+
+ /* 1 byte was consumed (must be re-added later for the
+ return value */
+ --length;
+
+ /* initialize metadata reader, allocate enough
+ memory (+1 for the null terminator) */
+ im->meta_position = 0;
+ im->meta_data = g_malloc(im->meta_size + 1);
+ }
+
+ assert(im->meta_position < im->meta_size);
+
+ if (length > im->meta_size - im->meta_position)
+ length = im->meta_size - im->meta_position;
+
+ memcpy(im->meta_data + im->meta_position, data, length);
+ im->meta_position += length;
+
+ if (p != data)
+ /* re-add the first byte (which contained meta_size) */
+ ++length;
+
+ if (im->meta_position == im->meta_size) {
+ /* null-terminate the string */
+
+ im->meta_data[im->meta_size] = 0;
+
+ /* parse */
+
+ if (im->tag != NULL)
+ tag_free(im->tag);
+
+ im->tag = icy_parse_tag(im->meta_data);
+ g_free(im->meta_data);
+
+ /* change back to normal data mode */
+
+ im->meta_size = 0;
+ im->data_rest = im->data_size;
+ }
+
+ return length;
+}
diff --git a/src/icy_metadata.h b/src/icy_metadata.h
new file mode 100644
index 000000000..fd2c7bbc0
--- /dev/null
+++ b/src/icy_metadata.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2003-2008 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef ICY_METADATA_H
+#define ICY_METADATA_H
+
+#include <stdbool.h>
+#include <stddef.h>
+
+struct icy_metadata {
+ size_t data_size, data_rest;
+
+ size_t meta_size, meta_position;
+ char *meta_data;
+
+ struct tag *tag;
+};
+
+/**
+ * Initialize a disabled icy_metadata object.
+ */
+static inline void
+icy_clear(struct icy_metadata *im)
+{
+ im->data_size = 0;
+}
+
+/**
+ * Initialize an enabled icy_metadata object with the specified
+ * data_size (from the icy-metaint HTTP response header).
+ */
+static inline void
+icy_start(struct icy_metadata *im, size_t data_size)
+{
+ im->data_size = im->data_rest = data_size;
+ im->meta_size = 0;
+ im->tag = NULL;
+}
+
+/**
+ * Resets the icy_metadata. Call this after rewinding the stream.
+ */
+void
+icy_reset(struct icy_metadata *im);
+
+void
+icy_deinit(struct icy_metadata *im);
+
+/**
+ * Checks whether the icy_metadata object is enabled.
+ */
+static inline bool
+icy_defined(const struct icy_metadata *im)
+{
+ return im->data_size > 0;
+}
+
+/**
+ * Evaluates data. Returns the number of bytes of normal data which
+ * can be read by the caller, but not more than "length". If the
+ * return value is smaller than "length", the caller should invoke
+ * icy_meta().
+ */
+size_t
+icy_data(struct icy_metadata *im, size_t length);
+
+/**
+ * Reads metadata from the stream. Returns the number of bytes
+ * consumed. If the return value is smaller than "length", the caller
+ * should invoke icy_data().
+ */
+size_t
+icy_meta(struct icy_metadata *im, const void *data, size_t length);
+
+static inline struct tag *
+icy_tag(struct icy_metadata *im)
+{
+ struct tag *tag = im->tag;
+ im->tag = NULL;
+ return tag;
+}
+
+#endif
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