2009-01-03 23:35:30 +01:00
|
|
|
/*
|
2010-01-01 05:55:13 +01:00
|
|
|
* Copyright (C) 2003-2010 The Music Player Daemon Project
|
2009-01-03 23:35:30 +01:00
|
|
|
* 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.
|
2009-03-13 18:43:16 +01:00
|
|
|
*
|
|
|
|
* 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.,
|
|
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
2009-01-03 23:35:30 +01:00
|
|
|
*/
|
|
|
|
|
2009-11-12 09:12:38 +01:00
|
|
|
#include "config.h"
|
2009-01-03 23:35:30 +01:00
|
|
|
#include "icy_metadata.h"
|
|
|
|
#include "tag.h"
|
|
|
|
|
|
|
|
#include <glib.h>
|
|
|
|
|
|
|
|
#include <assert.h>
|
|
|
|
#include <string.h>
|
|
|
|
|
2009-02-17 22:58:27 +01:00
|
|
|
#undef G_LOG_DOMAIN
|
|
|
|
#define G_LOG_DOMAIN "icy_metadata"
|
|
|
|
|
2009-01-03 23:35:30 +01:00
|
|
|
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(length > 0);
|
|
|
|
|
2009-01-03 23:55:03 +01:00
|
|
|
if (!icy_defined(im))
|
|
|
|
return length;
|
|
|
|
|
2009-01-03 23:35:30 +01:00
|
|
|
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)
|
2009-10-13 16:12:45 +02:00
|
|
|
icy_add_item(tag, TAG_TITLE, p[1]);
|
2009-01-03 23:35:30 +01:00
|
|
|
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;
|
|
|
|
|
2009-01-03 23:55:03 +01:00
|
|
|
memcpy(im->meta_data + im->meta_position, p, length);
|
2009-01-03 23:35:30 +01:00
|
|
|
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;
|
|
|
|
}
|