mpd/src/output/plugins/httpd/IcyMetaDataServer.cxx

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/*
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* Copyright 2003-2017 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
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#include "IcyMetaDataServer.hxx"
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#include "Page.hxx"
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#include "tag/Tag.hxx"
#include "util/FormatString.hxx"
#include "util/AllocatedString.hxx"
#include "util/StringUtil.hxx"
#include "util/Macros.hxx"
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#include <string.h>
AllocatedString<>
icy_server_metadata_header(const char *name,
const char *genre, const char *url,
const char *content_type, int metaint)
{
return FormatString("ICY 200 OK\r\n"
"icy-notice1:<BR>This stream requires an audio player!<BR>\r\n" /* TODO */
"icy-notice2:MPD - The music player daemon<BR>\r\n"
"icy-name: %s\r\n" /* TODO */
"icy-genre: %s\r\n" /* TODO */
"icy-url: %s\r\n" /* TODO */
"icy-pub:1\r\n"
"icy-metaint:%d\r\n"
/* TODO "icy-br:%d\r\n" */
"Content-Type: %s\r\n"
"Connection: close\r\n"
"Pragma: no-cache\r\n"
"Cache-Control: no-cache, no-store\r\n"
"\r\n",
name,
genre,
url,
metaint,
/* bitrate, */
content_type);
}
static AllocatedString<>
icy_server_metadata_string(const char *stream_title, const char* stream_url)
{
// The leading n is a placeholder for the length information
auto icy_metadata = FormatString("nStreamTitle='%s';"
"StreamUrl='%s';",
stream_title,
stream_url);
size_t meta_length = strlen(icy_metadata.c_str());
meta_length--; // subtract placeholder
meta_length = meta_length / 16 + 1;
icy_metadata[0] = meta_length;
if (meta_length > 255)
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return nullptr;
return icy_metadata;
}
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Page *
icy_server_metadata_page(const Tag &tag, const TagType *types)
{
const char *tag_items[TAG_NUM_OF_ITEM_TYPES];
int last_item = -1;
while (*types != TAG_NUM_OF_ITEM_TYPES) {
const char *tag_item = tag.GetValue(*types++);
if (tag_item)
tag_items[++last_item] = tag_item;
}
int item = 0;
// Length + Metadata - "StreamTitle='';StreamUrl='';" = 4081 - 28
char stream_title[(1 + 255 - 28) * 16];
char *p = stream_title, *const end = stream_title + ARRAY_SIZE(stream_title);
stream_title[0] = '\0';
while (p < end && item <= last_item) {
p = CopyString(p, tag_items[item++], end - p);
if (item <= last_item)
p = CopyString(p, " - ", end - p);
}
const auto icy_string = icy_server_metadata_string(stream_title, "");
if (icy_string.IsNull())
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return nullptr;
return Page::Copy(icy_string.c_str(), (icy_string[0] * 16) + 1);
}