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owntone-server/src/filescanner_icy.c

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/*
* Copyright (C) 2009-2010 Julien BLACHE <jb@jblache.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
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <netdb.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <pthread.h>
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <netinet/in.h>
#endif
#include <event.h>
#if defined HAVE_LIBEVENT2
# include <event2/http.h>
#else
# include "evhttp/evhttp_compat.h"
#endif
#include <libavformat/avformat.h>
#include "logger.h"
#include "filescanner.h"
#include "misc.h"
#define ICY_TIMEOUT 3
enum icy_request_status { ICY_INIT, ICY_WAITING, ICY_DONE };
static enum icy_request_status status;
/* TODO why doesn't evbase_scan work... */
extern struct event_base *evbase_main;
struct icy_ctx
{
char *url;
char address[INET6_ADDRSTRLEN];
char hostname[PATH_MAX];
char path[PATH_MAX];
int port;
char *icy_name;
char *icy_description;
char *icy_genre;
pthread_mutex_t lck;
pthread_cond_t cond;
};
#ifndef HAVE_LIBEVENT2
static int
resolve_address(char *hostname, char *s, size_t maxlen)
{
struct addrinfo *result;
int ret;
ret = getaddrinfo(hostname, NULL, NULL, &result);
if (ret != 0)
return -1;
switch(result->ai_addr->sa_family)
{
case AF_INET:
inet_ntop(AF_INET, &(((struct sockaddr_in *)result->ai_addr)->sin_addr), s, maxlen);
break;
case AF_INET6:
inet_ntop(AF_INET6, &(((struct sockaddr_in6 *)result->ai_addr)->sin6_addr), s, maxlen);
break;
default:
strncpy(s, "Unknown AF", maxlen);
freeaddrinfo(result);
return -1;
}
freeaddrinfo(result);
return 0;
}
#endif
#ifndef HAVE_LIBEVENT2_OLD
static void
scan_icy_request_cb(struct evhttp_request *req, void *arg)
{
struct icy_ctx *ctx;
ctx = (struct icy_ctx *)arg;
pthread_mutex_lock(&ctx->lck);
DPRINTF(E_DBG, L_SCAN, "ICY metadata request: Signal callback\n");
status = ICY_DONE;
pthread_cond_signal(&ctx->cond);
pthread_mutex_unlock(&ctx->lck);
}
/* Will always return -1 to make evhttp close the connection - we only need the http headers */
static int
scan_icy_header_cb(struct evhttp_request *req, void *arg)
{
struct icy_ctx *ctx;
struct evkeyvalq *headers;
const char *ptr;
ctx = (struct icy_ctx *)arg;
DPRINTF(E_DBG, L_SCAN, "ICY metadata request: Headers received\n");
headers = evhttp_request_get_input_headers(req);
if ( (ptr = evhttp_find_header(headers, "icy-name")) )
{
ctx->icy_name = strdup(ptr);
DPRINTF(E_DBG, L_SCAN, "Found ICY metadata, name is %s\n", ctx->icy_name);
}
if ( (ptr = evhttp_find_header(headers, "icy-description")) )
{
ctx->icy_description = strdup(ptr);
DPRINTF(E_DBG, L_SCAN, "Found ICY metadata, description is %s\n", ctx->icy_description);
}
if ( (ptr = evhttp_find_header(headers, "icy-genre")) )
{
ctx->icy_genre = strdup(ptr);
DPRINTF(E_DBG, L_SCAN, "Found ICY metadata, genre is %s\n", ctx->icy_genre);
}
return -1;
}
#endif
int
scan_metadata_icy(char *url, struct media_file_info *mfi)
{
struct icy_ctx *ctx;
struct evhttp_connection *evcon;
#ifndef HAVE_LIBEVENT2_OLD
struct evhttp_request *req;
struct evkeyvalq *headers;
char s[PATH_MAX];
#endif
time_t start;
time_t end;
int ret;
status = ICY_INIT;
start = time(NULL);
/* We can set this straight away */
mfi->url = strdup(url);
ctx = (struct icy_ctx *)malloc(sizeof(struct icy_ctx));
if (!ctx)
{
DPRINTF(E_LOG, L_SCAN, "Out of memory for ICY metadata context\n");
return -1;
}
memset(ctx, 0, sizeof(struct icy_ctx));
pthread_mutex_init(&ctx->lck, NULL);
pthread_cond_init(&ctx->cond, NULL);
ctx->url = url;
/* TODO https */
av_url_split(NULL, 0, NULL, 0, ctx->hostname, sizeof(ctx->hostname), &ctx->port, ctx->path, sizeof(ctx->path), ctx->url);
if ((!ctx->hostname) || (strlen(ctx->hostname) == 0))
{
DPRINTF(E_LOG, L_SCAN, "Error extracting hostname from playlist URL: %s\n", ctx->url);
return -1;
}
if (ctx->port < 0)
ctx->port = 80;
if (strlen(ctx->path) == 0)
{
ctx->path[0] = '/';
ctx->path[1] = '\0';
}
#ifdef HAVE_LIBEVENT2
evcon = evhttp_connection_base_new(evbase_main, NULL, ctx->hostname, (unsigned short)ctx->port);
if (!evcon)
{
DPRINTF(E_LOG, L_SCAN, "Could not create connection to %s\n", ctx->hostname);
goto no_icy;
}
#else
/* Resolve IP address */
ret = resolve_address(ctx->hostname, ctx->address, sizeof(ctx->address));
if (ret < 0)
{
DPRINTF(E_LOG, L_SCAN, "Could not find IP address of %s\n", ctx->hostname);
return -1;
}
DPRINTF(E_DBG, L_SCAN, "URL %s converted to hostname %s, port %d, path %s, IP %s\n", ctx->url, ctx->hostname, ctx->port, ctx->path, ctx->address);
/* Set up connection */
evcon = evhttp_connection_new(ctx->address, (unsigned short)ctx->port);
if (!evcon)
{
DPRINTF(E_LOG, L_SCAN, "Could not create connection to %s\n", ctx->hostname);
goto no_icy;
}
evhttp_connection_set_base(evcon, evbase_main);
#endif
#ifdef HAVE_LIBEVENT2_OLD
DPRINTF(E_LOG, L_SCAN, "Skipping Shoutcast metadata request for %s (requires libevent>=2.1.4 or libav 10)\n", ctx->hostname);
#else
evhttp_connection_set_timeout(evcon, ICY_TIMEOUT);
/* Set up request */
req = evhttp_request_new(scan_icy_request_cb, ctx);
if (!req)
{
DPRINTF(E_LOG, L_SCAN, "Could not create request to %s\n", ctx->hostname);
goto no_icy;
}
evhttp_request_set_header_cb(req, scan_icy_header_cb);
headers = evhttp_request_get_output_headers(req);
snprintf(s, PATH_MAX, "%s:%d", ctx->hostname, ctx->port);
evhttp_add_header(headers, "Host", s);
evhttp_add_header(headers, "Icy-MetaData", "1");
/* Make request */
DPRINTF(E_INFO, L_SCAN, "Making request to %s asking for ICY (Shoutcast) metadata\n", ctx->hostname);
status = ICY_WAITING;
ret = evhttp_make_request(evcon, req, EVHTTP_REQ_GET, ctx->path);
if (ret < 0)
{
DPRINTF(E_LOG, L_SCAN, "Error making request to %s\n", ctx->hostname);
status = ICY_DONE;
goto no_icy;
}
#endif
/* Can't count on server support for ICY metadata, so
* while waiting for a reply make a parallel call to scan_metadata_ffmpeg.
*/
no_icy:
ret = scan_metadata_ffmpeg(url, mfi);
if (ret < 0)
{
DPRINTF(E_LOG, L_SCAN, "Playlist URL is unavailable for probe/metadata, assuming MP3 encoding\n");
mfi->type = strdup("mp3");
mfi->codectype = strdup("mpeg");
mfi->description = strdup("MPEG audio file");
}
/* Wait for ICY request to complete or timeout */
pthread_mutex_lock(&ctx->lck);
if (status == ICY_WAITING)
pthread_cond_wait(&ctx->cond, &ctx->lck);
pthread_mutex_unlock(&ctx->lck);
/* Copy result to mfi */
if (ctx->icy_name)
{
if (mfi->title)
free(mfi->title);
if (mfi->artist)
free(mfi->artist);
if (mfi->album_artist)
free(mfi->album_artist);
mfi->title = strdup(ctx->icy_name);
mfi->artist = strdup(ctx->icy_name);
mfi->album_artist = strdup(ctx->icy_name);
free(ctx->icy_name);
}
if (ctx->icy_description)
{
if (mfi->album)
free(mfi->album);
mfi->album = ctx->icy_description;
}
if (ctx->icy_genre)
{
if (mfi->genre)
free(mfi->genre);
mfi->genre = ctx->icy_genre;
}
/* Clean up */
if (evcon)
evhttp_connection_free(evcon);
pthread_cond_destroy(&ctx->cond);
pthread_mutex_destroy(&ctx->lck);
free(ctx);
end = time(NULL);
DPRINTF(E_DBG, L_SCAN, "ICY metadata scan of %s completed in %.f sec\n", url, difftime(end, start));
return 1;
}
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