/* * 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 "raop_output_plugin.h" #include "output_api.h" #include "mixer_list.h" #include "raop_output_plugin.h" #include "rtsp_client.h" #include "glib_compat.h" #include #include #include #include #include #include #ifndef WIN32 #include #include #include #endif #undef G_LOG_DOMAIN #define G_LOG_DOMAIN "raop" 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(raop_session->data_fd); if (raop_session->ctrl.fd >= 0) close(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(GError **error_r) { struct raop_data *ret = g_new(struct raop_data, 1); 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); 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; 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, (void *) &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(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(¤t_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(¤t_time, NULL); int diff = difference(&rtp_time, ¤t_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 void * raop_output_init(G_GNUC_UNUSED const struct audio_format *audio_format, G_GNUC_UNUSED 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(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; } 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(void *data) { struct raop_data *rd = data; if (rd->rtspcl) rtspcl_close(rd->rtspcl); g_mutex_free(rd->control_mutex); g_free(rd); } #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(void *data) { //flush struct key_data kd; struct raop_data *rd = (struct raop_data *) data; 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(void *data) { struct raop_data *rd = (struct raop_data *) data; 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) { raop_session_free(raop_session); raop_session = NULL; } } static void raop_output_close(void *data) { //teardown struct raop_data *rd = data; 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(void *data, struct audio_format *audio_format, GError **error_r) { //setup, etc. struct raop_data *rd = data; 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(void *data, const void *chunk, size_t size, GError **error_r) { //raopcl_send_sample struct raop_data *rd = data; 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 raopPlugin = { .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, };