output/raop: delete the RAOP plugin

This plugin is horrible code, I mean it.  Last year, I tried hard to
fix it, but I figured would take less time to do a full rewrite.
Given that I don't even have any device that supports RAOP, I can't do
that properly.  After 16 months, nobody volunteered for fixing it.
Hereby, I delete it, because having no RAOP plugin is better than
having this mess.  Sorry.

1 files changed, 0 insertions, 1056 deletions

diff --git a/src/output/raop_output_plugin.c b/src/output/raop_output_plugin.c
deleted file mode 100644
index 6177b9b7d..000000000
--- a/src/output/raop_output_plugin.c
+++ /dev/null
@@ -1,1056 +0,0 @@
-/*
- * Copyright (C) 2003-2011 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"
-#include "raop_output_plugin.h"
-#include "output_api.h"
-#include "mixer_list.h"
-#include "fd_util.h"
-#include "ntp_server.h"
-#include "rtsp_client.h"
-#include "glib_compat.h"
-
-#include <glib.h>
-#include <unistd.h>
-#include <sys/time.h>
-#include <openssl/aes.h>
-#include <openssl/err.h>
-#include <openssl/rand.h>
-#include <openssl/rsa.h>
-#include <openssl/engine.h>
-
-#ifndef WIN32
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#endif
-
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "raop"
-
-struct play_state {
-	bool playing;
-	unsigned short seq_num;
-	unsigned int rtptime;
-	unsigned int sync_src;
-	unsigned int start_rtptime;
-	struct timeval start_time;
-	struct timeval last_send;
-};
-
-/*********************************************************************/
-
-enum pause_state {
-	NO_PAUSE = 0,
-	OP_PAUSE,
-	NODATA_PAUSE,
-};
-
-#define MINIMUM_SAMPLE_SIZE 32
-
-#define RAOP_FD_READ (1<<0)
-#define RAOP_FD_WRITE (1<<1)
-
-/*********************************************************************/
-
-struct encrypt_data {
-	AES_KEY ctx;
-	unsigned char iv[16]; // initialization vector for aes-cbc
-	unsigned char nv[16]; // next vector for aes-cbc
-	unsigned char key[16]; // key for aes-cbc
-};
-
-/*********************************************************************/
-
-struct raop_data {
-	struct audio_output base;
-
-	struct rtspcl_data *rtspcl;
-	const char *addr; // target host address
-	short rtsp_port;
-	struct sockaddr_in ctrl_addr;
-	struct sockaddr_in data_addr;
-
-	bool is_master;
-	struct raop_data *next;
-
-	unsigned volume;
-
-	GMutex *control_mutex;
-
-	bool started;
-	bool paused;
-};
-
-/*********************************************************************/
-
-struct control_data {
-	unsigned short port;
-	int fd;
-};
-
-/*********************************************************************/
-
-#define NUMSAMPLES 352
-#define RAOP_BUFFER_SIZE NUMSAMPLES * 4
-#define RAOP_HEADER_SIZE 12
-#define ALAC_MAX_HEADER_SIZE 8
-#define RAOP_MAX_PACKET_SIZE RAOP_BUFFER_SIZE + RAOP_HEADER_SIZE + ALAC_MAX_HEADER_SIZE
-
-// session
-struct raop_session_data {
-	struct raop_data *raop_list;
-	struct ntp_server ntp;
-	struct control_data ctrl;
-	struct encrypt_data encrypt;
-	struct play_state play_state;
-
-	int data_fd;
-
-	unsigned char buffer[RAOP_BUFFER_SIZE];
-	size_t bufferSize;
-
-	unsigned char data[RAOP_MAX_PACKET_SIZE];
-	int wblk_wsize;
-	int wblk_remsize;
-
-	GMutex *data_mutex;
-	GMutex *list_mutex;
-};
-
-/*********************************************************************/
-
-static struct raop_session_data *raop_session = NULL;
-
-/**
- * The quark used for GError.domain.
- */
-static inline GQuark
-raop_output_quark(void)
-{
-	return g_quark_from_static_string("raop_output");
-}
-
-static void
-raop_session_free(struct raop_session_data *session)
-{
-	assert(session != NULL);
-	assert(session->raop_list == NULL);
-
-	ntp_server_close(&session->ntp);
-
-	if (session->data_mutex != NULL)
-		g_mutex_free(session->data_mutex);
-
-	if (session->list_mutex != NULL)
-		g_mutex_free(session->list_mutex);
-
-	if (raop_session->data_fd >= 0)
-		close_socket(raop_session->data_fd);
-
-	if (raop_session->ctrl.fd >= 0)
-		close_socket(raop_session->ctrl.fd);
-
-	g_free(session);
-}
-
-static struct raop_session_data *
-raop_session_new(GError **error_r)
-{
-	struct raop_session_data *session = g_new(struct raop_session_data, 1);
-	session->raop_list = NULL;
-
-	session->data_mutex = g_mutex_new();
-	session->list_mutex = g_mutex_new();
-
-	ntp_server_init(&session->ntp);
-	session->ctrl.port = 6001;
-	session->ctrl.fd = -1;
-	session->play_state.playing = false;
-	session->play_state.seq_num = (short) g_random_int();
-	session->play_state.rtptime = g_random_int();
-	session->play_state.sync_src = g_random_int();
-	session->play_state.last_send.tv_sec = 0;
-	session->play_state.last_send.tv_usec = 0;
-	session->data_fd = -1;
-
-	if (!RAND_bytes(session->encrypt.iv, sizeof(session->encrypt.iv)) ||
-	    !RAND_bytes(session->encrypt.key, sizeof(session->encrypt.key))) {
-		raop_session_free(session);
-		g_set_error(error_r, raop_output_quark(), 0,
-			    "RAND_bytes error code=%ld", ERR_get_error());
-		return NULL;
-	}
-	memcpy(session->encrypt.nv, session->encrypt.iv, sizeof(session->encrypt.nv));
-	for (unsigned i = 0; i < 16; i++) {
-		printf("0x%x ", session->encrypt.key[i]);
-	}
-	printf("\n");
-	AES_set_encrypt_key(session->encrypt.key, 128, &session->encrypt.ctx);
-
-	memset(session->buffer, 0, RAOP_BUFFER_SIZE);
-	session->bufferSize = 0;
-
-	return session;
-}
-
-static struct raop_data *
-new_raop_data(const struct config_param *param, GError **error_r)
-{
-	struct raop_data *ret = g_new(struct raop_data, 1);
-	if (!ao_base_init(&ret->base, &raop_output_plugin, param, error_r)) {
-		g_free(ret);
-		return NULL;
-	}
-
-	ret->control_mutex = g_mutex_new();
-
-	ret->next = NULL;
-	ret->is_master = 0;
-	ret->started = 0;
-	ret->paused = 0;
-
-	if (raop_session == NULL &&
-	    (raop_session = raop_session_new(error_r)) == NULL) {
-		g_mutex_free(ret->control_mutex);
-		ao_base_finish(&ret->base);
-		g_free(ret);
-		return NULL;
-	}
-
-	return ret;
-}
-
-/*
- * remove one character from a string
- * return the number of deleted characters
- */
-static int
-remove_char_from_string(char *str, char c)
-{
-	char *src, *dst;
-
-	/* skip all characters that don't need to be copied */
-	src = strchr(str, c);
-	if (!src)
-		return 0;
-
-	for (dst = src; *src; src++)
-		if (*src != c)
-			*(dst++) = *src;
-
-	*dst = '\0';
-
-	return src - dst;
-}
-
-/* bind an opened socket to specified hostname and port.
- * if hostname=NULL, use INADDR_ANY.
- * if *port=0, use dynamically assigned port
- */
-static int bind_host(int sd, char *hostname, unsigned long ulAddr,
-		     unsigned short *port, GError **error_r)
-{
-	struct sockaddr_in my_addr;
-	socklen_t nlen = sizeof(struct sockaddr);
-	struct hostent *h;
-
-	memset(&my_addr, 0, sizeof(my_addr));
-	/* use specified hostname */
-	if (hostname) {
-		/* get server IP address (no check if input is IP address or DNS name) */
-		h = gethostbyname(hostname);
-		if (h == NULL) {
-			if (strstr(hostname, "255.255.255.255") == hostname) {
-				my_addr.sin_addr.s_addr=-1;
-			} else {
-				if ((my_addr.sin_addr.s_addr = inet_addr(hostname)) == 0xFFFFFFFF) {
-					g_set_error(error_r, raop_output_quark(), 0,
-						    "failed to resolve host '%s'",
-						    hostname);
-					return -1;
-				}
-			}
-			my_addr.sin_family = AF_INET;
-		} else {
-			my_addr.sin_family = h->h_addrtype;
-			memcpy((char *) &my_addr.sin_addr.s_addr,
-			       h->h_addr_list[0], h->h_length);
-		}
-	} else {
-		// if hostname=NULL, use INADDR_ANY
-		if (ulAddr)
-			my_addr.sin_addr.s_addr = ulAddr;
-		else
-			my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
-		my_addr.sin_family = AF_INET;
-	}
-
-	/* bind a specified port */
-	my_addr.sin_port = htons(*port);
-
-	if (bind(sd, (struct sockaddr *) &my_addr, sizeof(my_addr)) < 0) {
-		g_set_error(error_r, raop_output_quark(), errno,
-			    "failed to bind socket: %s",
-			    g_strerror(errno));
-		return -1;
-	}
-
-	if (*port == 0) {
-		getsockname(sd, (struct sockaddr *) &my_addr, &nlen);
-		*port = ntohs(my_addr.sin_port);
-	}
-
-	return 0;
-}
-
-/*
- * open udp  port
- */
-static int
-open_udp_socket(char *hostname, unsigned short *port,
-		GError **error_r)
-{
-	int sd;
-	const int size = 30000;
-
-	/* socket creation */
-	sd = socket(PF_INET, SOCK_DGRAM, 0);
-	if (sd < 0) {
-		g_set_error(error_r, raop_output_quark(), errno,
-			    "failed to create UDP socket: %s",
-			    g_strerror(errno));
-		return -1;
-	}
-	if (setsockopt(sd, SOL_SOCKET, SO_SNDBUF, (const char *) &size, sizeof(size)) < 0) {
-		g_set_error(error_r, raop_output_quark(), errno,
-			    "failed to set UDP buffer size: %s",
-			    g_strerror(errno));
-		return -1;
-	}
-	if (bind_host(sd, hostname, 0, port, error_r)) {
-		close_socket(sd);
-		return -1;
-	}
-
-	return sd;
-}
-
-static bool
-get_sockaddr_by_host(const char *host, short destport,
-		     struct sockaddr_in *addr,
-		     GError **error_r)
-{
-	struct hostent *h;
-
-	h = gethostbyname(host);
-	if (h) {
-		addr->sin_family = h->h_addrtype;
-		memcpy((char *) &addr->sin_addr.s_addr, h->h_addr_list[0], h->h_length);
-	} else {
-		addr->sin_family = AF_INET;
-		if ((addr->sin_addr.s_addr=inet_addr(host))==0xFFFFFFFF) {
-			g_set_error(error_r, rtsp_client_quark(), 0,
-				    "failed to resolve host '%s'", host);
-			return false;
-		}
-	}
-	addr->sin_port = htons(destport);
-	return true;
-}
-
-/*
- * Calculate the current NTP time, store it in the buffer.
- */
-static void
-fill_int(unsigned char *buffer, uint32_t value)
-{
-	uint32_t be = GINT32_TO_BE(value);
-	memcpy(buffer, &be, sizeof(be));
-}
-
-/*
- * Store time in the NTP format in the buffer
- */
-static void
-fill_time_buffer_with_time(unsigned char *buffer, struct timeval *tout)
-{
-	unsigned long secs_to_baseline = 964697997;
-	double fraction;
-	unsigned long long_fraction;
-	unsigned long secs;
-
-	fraction = ((double) tout->tv_usec) / 1000000.0;
-	long_fraction = (unsigned long) (fraction * 256.0 * 256.0 * 256.0 * 256.0);
-	secs = secs_to_baseline + tout->tv_sec;
-	fill_int(buffer, secs);
-	fill_int(buffer + 4, long_fraction);
-}
-
-static void
-get_time_for_rtp(struct play_state *state, struct timeval *tout)
-{
-	unsigned long rtp_diff = state->rtptime - state->start_rtptime;
-	unsigned long add_secs = rtp_diff / 44100;
-	unsigned long add_usecs = (((rtp_diff % 44100) * 10000) / 441) % 1000000;
-	tout->tv_sec = state->start_time.tv_sec + add_secs;
-	tout->tv_usec = state->start_time.tv_usec + add_usecs;
-	if (tout->tv_usec >= 1000000) {
-		tout->tv_sec++;
-		tout->tv_usec = tout->tv_usec % 1000000;
-	}
-}
-
-/*
- * Send a control command
- */
-static bool
-send_control_command(struct control_data *ctrl, struct raop_data *rd,
-		     struct play_state *state,
-		     GError **error_r)
-{
-	unsigned char buf[20];
-	int diff;
-	int num_bytes;
-	struct timeval ctrl_time;
-
-	diff = 88200;
-	if (rd->started) {
-		buf[0] = 0x80;
-		diff += NUMSAMPLES;
-	} else {
-		buf[0] = 0x90;
-		state->playing = true;
-		state->start_rtptime = state->rtptime;
-	}
-	buf[1] = 0xd4;
-	buf[2] = 0x00;
-	buf[3] = 0x07;
-	fill_int(buf + 4, state->rtptime - diff);
-	get_time_for_rtp(state, &ctrl_time);
-	fill_time_buffer_with_time(buf + 8, &ctrl_time);
-	fill_int(buf + 16, state->rtptime);
-
-	num_bytes = sendto(ctrl->fd, (const void *)buf, sizeof(buf), 0,
-			   (struct sockaddr *)&rd->ctrl_addr,
-			   sizeof(rd->ctrl_addr));
-	if (num_bytes < 0) {
-		g_set_error(error_r, raop_output_quark(), errno,
-			    "Unable to send control command: %s",
-			    g_strerror(errno));
-		return false;
-	}
-
-	return true;
-}
-
-static int rsa_encrypt(const unsigned char *text, int len, unsigned char *res)
-{
-	RSA *rsa;
-	gsize usize;
-	unsigned char *modulus;
-	unsigned char *exponent;
-	int size;
-
-	char n[] =
-		"59dE8qLieItsH1WgjrcFRKj6eUWqi+bGLOX1HL3U3GhC/j0Qg90u3sG/1CUtwC"
-		"5vOYvfDmFI6oSFXi5ELabWJmT2dKHzBJKa3k9ok+8t9ucRqMd6DZHJ2YCCLlDR"
-		"KSKv6kDqnw4UwPdpOMXziC/AMj3Z/lUVX1G7WSHCAWKf1zNS1eLvqr+boEjXuB"
-		"OitnZ/bDzPHrTOZz0Dew0uowxf/+sG+NCK3eQJVxqcaJ/vEHKIVd2M+5qL71yJ"
-		"Q+87X6oV3eaYvt3zWZYD6z5vYTcrtij2VZ9Zmni/UAaHqn9JdsBWLUEpVviYnh"
-		"imNVvYFZeCXg/IdTQ+x4IRdiXNv5hEew==";
-	char e[] = "AQAB";
-
-	rsa = RSA_new();
-
-	modulus = g_base64_decode(n, &usize);
-	rsa->n = BN_bin2bn(modulus, usize, NULL);
-	exponent = g_base64_decode(e, &usize);
-	rsa->e = BN_bin2bn(exponent, usize, NULL);
-	g_free(modulus);
-	g_free(exponent);
-	size = RSA_public_encrypt(len, text, res, rsa, RSA_PKCS1_OAEP_PADDING);
-
-	RSA_free(rsa);
-	return size;
-}
-
-static int
-raop_encrypt(struct encrypt_data *encryp, unsigned char *data, int size)
-{
-	// any bytes that fall beyond the last 16 byte page should be sent
-	// in the clear
-	int alt_size = size - (size % 16);
-
-	memcpy(encryp->nv, encryp->iv, 16);
-
-	AES_cbc_encrypt(data, data, alt_size, &encryp->ctx, encryp->nv, 1);
-
-	return size;
-}
-
-/* write bits filed data, *bpos=0 for msb, *bpos=7 for lsb
-   d=data, blen=length of bits field
-*/
-static inline void
-bits_write(unsigned char **p, unsigned char d, int blen, int *bpos)
-{
-	int lb, rb, bd;
-	lb =7 - *bpos;
-	rb = lb - blen + 1;
-	if (rb >= 0) {
-		bd = d << rb;
-		if (*bpos)
-			**p |= bd;
-		else
-			**p = bd;
-		*bpos += blen;
-	} else {
-		bd = d >> -rb;
-		**p |= bd;
-		*p += 1;
-		**p = d << (8 + rb);
-		*bpos = -rb;
-	}
-}
-
-static bool
-wrap_pcm(unsigned char *buffer, int bsize, int *size, unsigned char *inData, int inSize)
-{
-	unsigned char one[4];
-	int count = 0;
-	int bpos = 0;
-	unsigned char *bp = buffer;
-	int i, nodata = 0;
-	bits_write(&bp, 1, 3, &bpos); // channel=1, stereo
-	bits_write(&bp, 0, 4, &bpos); // unknown
-	bits_write(&bp, 0, 8, &bpos); // unknown
-	bits_write(&bp, 0, 4, &bpos); // unknown
-	if (bsize != 4096 && false)
-		bits_write(&bp, 1, 1, &bpos); // hassize
-	else
-		bits_write(&bp, 0, 1, &bpos); // hassize
-	bits_write(&bp, 0, 2, &bpos); // unused
-	bits_write(&bp, 1, 1, &bpos); // is-not-compressed
-	if (bsize != 4096 && false) {
-		// size of data, integer, big endian
-		bits_write(&bp, (bsize >> 24) & 0xff, 8, &bpos);
-		bits_write(&bp, (bsize >> 16) & 0xff, 8, &bpos);
-		bits_write(&bp, (bsize >> 8) & 0xff, 8, &bpos);
-		bits_write(&bp, bsize&0xff, 8, &bpos);
-	}
-	while (1) {
-		if (inSize <= count * 4) nodata = 1;
-		if (nodata) break;
-		one[0] = inData[count * 4];
-		one[1] = inData[count * 4 + 1];
-		one[2] = inData[count * 4 + 2];
-		one[3] = inData[count * 4 + 3];
-
-#if BYTE_ORDER == BIG_ENDIAN
-		bits_write(&bp, one[0], 8, &bpos);
-		bits_write(&bp, one[1], 8, &bpos);
-		bits_write(&bp, one[2], 8, &bpos);
-		bits_write(&bp, one[3], 8, &bpos);
-#else
-		bits_write(&bp, one[1], 8, &bpos);
-		bits_write(&bp, one[0], 8, &bpos);
-		bits_write(&bp, one[3], 8, &bpos);
-		bits_write(&bp, one[2], 8, &bpos);
-#endif
-
-		if (++count == bsize) break;
-	}
-	if (!count) return false; // when no data at all, it should stop playing
-	/* when readable size is less than bsize, fill 0 at the bottom */
-	for(i = 0; i < (bsize - count) * 4; i++) {
-		bits_write(&bp, 0, 8, &bpos);
-	}
-	*size = (int)(bp - buffer);
-	if (bpos) *size += 1;
-	return true;
-}
-
-static bool
-raopcl_connect(struct raop_data *rd, GError **error_r)
-{
-	unsigned char buf[4 + 8 + 16];
-	char sid[16];
-	char sci[24];
-	char act_r[17];
-	char *sac=NULL, *key = NULL, *iv = NULL;
-	char sdp[1024];
-	int rval = false;
-	unsigned char rsakey[512];
-	struct timeval current_time;
-	unsigned int sessionNum;
-	int i;
-
-
-	gettimeofday(&current_time,NULL);
-	sessionNum = current_time.tv_sec + 2082844804;
-
-	RAND_bytes(buf, sizeof(buf));
-	sprintf(act_r, "%u", (unsigned int) g_random_int());
-	sprintf(sid, "%u", sessionNum);
-	sprintf(sci, "%08x%08x", *((int *)(buf + 4)), *((int *)(buf + 8)));
-	sac = g_base64_encode(buf + 12, 16);
-	rd->rtspcl = rtspcl_open();
-	rtspcl_set_useragent(rd->rtspcl, "iTunes/8.1.1 (Macintosh; U; PPC Mac OS X 10.4)");
-	rtspcl_add_exthds(rd->rtspcl, "Client-Instance", sci);
-	rtspcl_add_exthds(rd->rtspcl, "DACP-ID", sci);
-	rtspcl_add_exthds(rd->rtspcl, "Active-Remote", act_r);
-	if (!rtspcl_connect(rd->rtspcl, rd->addr, rd->rtsp_port, sid, error_r))
-		goto erexit;
-
-	i = rsa_encrypt(raop_session->encrypt.key, 16, rsakey);
-	key = g_base64_encode(rsakey, i);
-	remove_char_from_string(key, '=');
-	iv = g_base64_encode(raop_session->encrypt.iv, 16);
-	remove_char_from_string(iv, '=');
-	sprintf(sdp,
-		"v=0\r\n"
-		"o=iTunes %s 0 IN IP4 %s\r\n"
-		"s=iTunes\r\n"
-		"c=IN IP4 %s\r\n"
-		"t=0 0\r\n"
-		"m=audio 0 RTP/AVP 96\r\n"
-		"a=rtpmap:96 AppleLossless\r\n"
-		"a=fmtp:96 %d  0 16 40 10 14 2 255 0 0 44100\r\n"
-		"a=rsaaeskey:%s\r\n"
-		"a=aesiv:%s\r\n",
-		sid, rtspcl_local_ip(rd->rtspcl), rd->addr, NUMSAMPLES, key, iv);
-	remove_char_from_string(sac, '=');
-	// rtspcl_add_exthds(rd->rtspcl, "Apple-Challenge", sac);
-	if (!rtspcl_announce_sdp(rd->rtspcl, sdp, error_r))
-		goto erexit;
-	//	if (!rtspcl_mark_del_exthds(rd->rtspcl, "Apple-Challenge")) goto erexit;
-	if (!rtspcl_setup(rd->rtspcl, NULL,
-			  raop_session->ctrl.port, raop_session->ntp.port,
-			  error_r))
-		goto erexit;
-
-	if (!get_sockaddr_by_host(rd->addr, rd->rtspcl->control_port,
-				  &rd->ctrl_addr, error_r))
-		goto erexit;
-
-	if (!get_sockaddr_by_host(rd->addr, rd->rtspcl->server_port,
-				  &rd->data_addr, error_r))
-		goto erexit;
-
-	if (!rtspcl_record(rd->rtspcl,
-			   raop_session->play_state.seq_num,
-			   raop_session->play_state.rtptime,
-			   error_r))
-		goto erexit;
-
-	rval = true;
-
- erexit:
-	g_free(sac);
-	g_free(key);
-	g_free(iv);
-	return rval;
-}
-
-static int
-difference (struct timeval *t1, struct timeval *t2)
-{
-	int ret = 150000000;
-	if (t1->tv_sec - t2->tv_sec < 150) {
-		ret = (t1->tv_sec - t2->tv_sec) * 1000000;
-		ret += t1->tv_usec - t2->tv_usec;
-	}
-	return ret;
-}
-
-/*
- * With airtunes version 2, we don't get responses back when we send audio
- * data.  The only requests we get from the airtunes device are timing
- * requests.
- */
-static bool
-send_audio_data(int fd, GError **error_r)
-{
-	int i = 0;
-	struct timeval current_time, rtp_time;
-	struct raop_data *rd = raop_session->raop_list;
-
-	get_time_for_rtp(&raop_session->play_state, &rtp_time);
-	gettimeofday(&current_time, NULL);
-	int diff = difference(&rtp_time, &current_time);
-	if (diff > 0)
-		g_usleep(diff);
-
-	gettimeofday(&raop_session->play_state.last_send, NULL);
-	while (rd) {
-		if (rd->started) {
-			raop_session->data[1] = 0x60;
-		} else {
-			rd->started = true;
-			raop_session->data[1] = 0xe0;
-		}
-		i = sendto(fd, (const void *)(raop_session->data + raop_session->wblk_wsize),
-			   raop_session->wblk_remsize, 0, (struct sockaddr *) &rd->data_addr,
-			   sizeof(rd->data_addr));
-		if (i < 0) {
-			g_set_error(error_r, raop_output_quark(), errno,
-				    "write error: %s",
-				    g_strerror(errno));
-			return false;
-		}
-		if (i == 0) {
-			g_set_error_literal(error_r, raop_output_quark(), 0,
-					    "disconnected on the other end");
-			return false;
-		}
-		rd = rd->next;
-	}
-	raop_session->wblk_wsize += i;
-	raop_session->wblk_remsize -= i;
-
-	return true;
-}
-
-static struct audio_output *
-raop_output_init(const struct config_param *param, GError **error_r)
-{
-	const char *host = config_get_block_string(param, "host", NULL);
-	if (host == NULL) {
-		g_set_error_literal(error_r, raop_output_quark(), 0,
-				    "missing option 'host'");
-		return NULL;
-	}
-
-	struct raop_data *rd;
-
-	rd = new_raop_data(param, error_r);
-	if (rd == NULL)
-		return NULL;
-
-	rd->addr = host;
-	rd->rtsp_port = config_get_block_unsigned(param, "port", 5000);
-	rd->volume = config_get_block_unsigned(param, "volume", 75);
-	return &rd->base;
-}
-
-static bool
-raop_set_volume_local(struct raop_data *rd, int volume, GError **error_r)
-{
-	char vol_str[128];
-	sprintf(vol_str, "volume: %d.000000\r\n", volume);
-	return rtspcl_set_parameter(rd->rtspcl, vol_str, error_r);
-}
-
-
-static void
-raop_output_finish(struct audio_output *ao)
-{
-	struct raop_data *rd = (struct raop_data *)ao;
-
-	if (rd->rtspcl)
-		rtspcl_close(rd->rtspcl);
-
-	g_mutex_free(rd->control_mutex);
-	ao_base_finish(&rd->base);
-	g_free(rd);
-
-	if (raop_session->raop_list == NULL) {
-		raop_session_free(raop_session);
-		raop_session = NULL;
-	}
-}
-
-#define RAOP_VOLUME_MIN -30
-#define RAOP_VOLUME_MAX 0
-
-int
-raop_get_volume(struct raop_data *rd)
-{
-	return rd->volume;
-}
-
-bool
-raop_set_volume(struct raop_data *rd, unsigned volume, GError **error_r)
-{
-	int raop_volume;
-	bool rval;
-
-	//set parameter volume
-	if (volume == 0) {
-		raop_volume = -144;
-	} else {
-		raop_volume = RAOP_VOLUME_MIN +
-			(RAOP_VOLUME_MAX - RAOP_VOLUME_MIN) * volume / 100;
-	}
-	g_mutex_lock(rd->control_mutex);
-	rval = raop_set_volume_local(rd, raop_volume, error_r);
-	if (rval) rd->volume = volume;
-	g_mutex_unlock(rd->control_mutex);
-
-	return rval;
-}
-
-static void
-raop_output_cancel(struct audio_output *ao)
-{
-	//flush
-	struct key_data kd;
-	struct raop_data *rd = (struct raop_data *)ao;
-	int flush_diff = 1;
-
-	rd->started = 0;
-	if (rd->is_master) {
-		raop_session->play_state.playing = false;
-	}
-	if (rd->paused) {
-		return;
-	}
-
-	g_mutex_lock(rd->control_mutex);
-	static char rtp_key[] = "RTP-Info";
-	kd.key = rtp_key;
-	char buf[128];
-	sprintf(buf, "seq=%d; rtptime=%d", raop_session->play_state.seq_num + flush_diff, raop_session->play_state.rtptime + NUMSAMPLES * flush_diff);
-	kd.data = buf;
-	kd.next = NULL;
-	exec_request(rd->rtspcl, "FLUSH", NULL, NULL, 1,
-		     &kd, NULL, NULL);
-	g_mutex_unlock(rd->control_mutex);
-}
-
-static bool
-raop_output_pause(struct audio_output *ao)
-{
-	struct raop_data *rd = (struct raop_data *)ao;
-
-	rd->paused = true;
-	return true;
-}
-
-/**
- * Remove the output from the session's list.  Caller must not lock
- * the list_mutex.
- */
-static void
-raop_output_remove(struct raop_data *rd)
-{
-	struct raop_data *iter = raop_session->raop_list;
-	struct raop_data *prev = NULL;
-
-	g_mutex_lock(raop_session->list_mutex);
-	while (iter) {
-		if (iter == rd) {
-			if (prev != NULL) {
-				prev->next = rd->next;
-			} else {
-				raop_session->raop_list = rd->next;
-			}
-			if (rd->is_master && raop_session->raop_list != NULL) {
-				raop_session->raop_list->is_master = true;
-			}
-			rd->next = NULL;
-			rd->is_master = false;
-			break;
-		}
-		prev = iter;
-		iter = iter->next;
-	}
-	g_mutex_unlock(raop_session->list_mutex);
-
-	if (raop_session->raop_list == NULL) {
-		ntp_server_close(&raop_session->ntp);
-		close(raop_session->ctrl.fd);
-		raop_session->ctrl.fd = -1;
-	}
-}
-
-static void
-raop_output_close(struct audio_output *ao)
-{
-	//teardown
-	struct raop_data *rd = (struct raop_data *)ao;
-
-	raop_output_remove(rd);
-
-	g_mutex_lock(rd->control_mutex);
-	exec_request(rd->rtspcl, "TEARDOWN", NULL, NULL, 0,
-		     NULL, NULL, NULL);
-	g_mutex_unlock(rd->control_mutex);
-
-	rd->started = 0;
-}
-
-
-static bool
-raop_output_open(struct audio_output *ao, struct audio_format *audio_format, GError **error_r)
-{
-	//setup, etc.
-	struct raop_data *rd = (struct raop_data *)ao;
-
-	g_mutex_lock(raop_session->list_mutex);
-	if (raop_session->raop_list == NULL) {
-		// first raop, need to initialize session data
-		unsigned short myport = 0;
-		raop_session->raop_list = rd;
-		rd->is_master = true;
-
-		raop_session->data_fd = open_udp_socket(NULL, &myport,
-							error_r);
-		if (raop_session->data_fd < 0)
-			return false;
-
-		if (!ntp_server_open(&raop_session->ntp, error_r))
-			return false;
-
-		raop_session->ctrl.fd =
-			open_udp_socket(NULL, &raop_session->ctrl.port,
-					error_r);
-		if (raop_session->ctrl.fd < 0) {
-			ntp_server_close(&raop_session->ntp);
-			raop_session->ctrl.fd = -1;
-			g_mutex_unlock(raop_session->list_mutex);
-			return false;
-		}
-	}
-	g_mutex_unlock(raop_session->list_mutex);
-
-	audio_format->format = SAMPLE_FORMAT_S16;
-	if (!raopcl_connect(rd, error_r)) {
-		raop_output_remove(rd);
-		return false;
-	}
-
-	if (!raop_set_volume(rd, rd->volume, error_r)) {
-		raop_output_remove(rd);
-		return false;
-	}
-
-	g_mutex_lock(raop_session->list_mutex);
-	if (!rd->is_master) {
-		rd->next = raop_session->raop_list;
-		raop_session->raop_list = rd;
-	}
-	g_mutex_unlock(raop_session->list_mutex);
-	return true;
-}
-
-static size_t
-raop_output_play(struct audio_output *ao, const void *chunk, size_t size,
-		 GError **error_r)
-{
-	//raopcl_send_sample
-	struct raop_data *rd = (struct raop_data *)ao;
-	size_t rval = 0, orig_size = size;
-
-	rd->paused = false;
-	if (!rd->is_master) {
-		// only process data for the master raop
-		return size;
-	}
-
-	g_mutex_lock(raop_session->data_mutex);
-
-	if (raop_session->play_state.rtptime <= NUMSAMPLES) {
-		// looped over, need new reference point to calculate correct times
-		raop_session->play_state.playing = false;
-	}
-
-	while (raop_session->bufferSize + size >= RAOP_BUFFER_SIZE) {
-		// ntp header
-		unsigned char header[] = {
-			0x80, 0x60, 0x00, 0x00,
-			// rtptime
-			0x00, 0x00, 0x00, 0x00,
-			// device
-			0x7e, 0xad, 0xd2, 0xd3,
-		};
-
-
-		int count = 0;
-		int copyBytes = RAOP_BUFFER_SIZE - raop_session->bufferSize;
-
-		if (!raop_session->play_state.playing ||
-		    raop_session->play_state.seq_num % (44100 / NUMSAMPLES + 1) == 0) {
-			struct raop_data *iter;
-			g_mutex_lock(raop_session->list_mutex);
-			if (!raop_session->play_state.playing) {
-				gettimeofday(&raop_session->play_state.start_time,NULL);
-			}
-			iter = raop_session->raop_list;
-			while (iter) {
-				if (!send_control_command(&raop_session->ctrl, iter,
-							  &raop_session->play_state,
-							  error_r))
-					goto erexit;
-
-				iter = iter->next;
-			}
-			g_mutex_unlock(raop_session->list_mutex);
-		}
-
-		fill_int(header + 8, raop_session->play_state.sync_src);
-
-		memcpy(raop_session->buffer + raop_session->bufferSize, chunk, copyBytes);
-		raop_session->bufferSize += copyBytes;
-		chunk = ((const char *)chunk) + copyBytes;
-		size -= copyBytes;
-
-		if (!wrap_pcm(raop_session->data + RAOP_HEADER_SIZE, NUMSAMPLES, &count, raop_session->buffer, RAOP_BUFFER_SIZE)) {
-			g_warning("unable to encode %d bytes properly\n", RAOP_BUFFER_SIZE);
-		}
-
-		memcpy(raop_session->data, header, RAOP_HEADER_SIZE);
-		raop_session->data[2] = raop_session->play_state.seq_num >> 8;
-		raop_session->data[3] = raop_session->play_state.seq_num & 0xff;
-		raop_session->play_state.seq_num ++;
-
-		fill_int(raop_session->data + 4, raop_session->play_state.rtptime);
-		raop_session->play_state.rtptime += NUMSAMPLES;
-
-		raop_encrypt(&raop_session->encrypt, raop_session->data + RAOP_HEADER_SIZE, count);
-		raop_session->wblk_remsize = count + RAOP_HEADER_SIZE;
-		raop_session->wblk_wsize = 0;
-
-		if (!send_audio_data(raop_session->data_fd, error_r))
-			goto erexit;
-
-		raop_session->bufferSize = 0;
-	}
-	if (size > 0) {
-		memcpy(raop_session->buffer + raop_session->bufferSize, chunk, size);
-		raop_session->bufferSize += size;
-	}
-	rval = orig_size;
- erexit:
-	g_mutex_unlock(raop_session->data_mutex);
-	return rval;
-}
-
-const struct audio_output_plugin raop_output_plugin = {
-	.name = "raop",
-	.init = raop_output_init,
-	.finish = raop_output_finish,
-	.open = raop_output_open,
-	.play = raop_output_play,
-	.cancel = raop_output_cancel,
-	.pause = raop_output_pause,
-	.close = raop_output_close,
-	.mixer_plugin = &raop_mixer_plugin,
-};