jackaudio
/
jack1
mirror of https://github.com/jackaudio/jack1
1
0
Fork 0
Code Releases 19 Activity
jack1 codebase
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1004 Commits
4 Branches
6.5MB
Tree: 606ab3652d
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '606ab3652d'
${ noResults }
jack1/drivers/netjack/net_driver.c

1084 lines
37KB
Raw Blame History 

  1. /* -*- mode: c; c-file-style: "linux"; -*- */

  2. /*

  3. NetJack Driver

  4. 

  5. Copyright (C) 2008 Pieter Palmers <pieterpalmers@users.sourceforge.net>

  6. Copyright (C) 2006 Torben Hohn <torbenh@gmx.de>

  7. Copyright (C) 2003 Robert Ham <rah@bash.sh>

  8. Copyright (C) 2001 Paul Davis

  9. 

  10. This program is free software; you can redistribute it and/or modify

  11. it under the terms of the GNU General Public License as published by

  12. the Free Software Foundation; either version 2 of the License, or

  13. (at your option) any later version.

  14. 

  15. This program is distributed in the hope that it will be useful,

  16. but WITHOUT ANY WARRANTY; without even the implied warranty of

  17. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  18. GNU General Public License for more details.

  19. 

  20. You should have received a copy of the GNU General Public License

  21. along with this program; if not, write to the Free Software

  22. Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

  23. 

  24. $Id: net_driver.c,v 1.17 2006/04/16 20:16:10 torbenh Exp $

  25. */

  26. 

  27. #include <math.h>

  28. #include <stdio.h>

  29. #include <memory.h>

  30. #include <unistd.h>

  31. #include <stdlib.h>

  32. #include <errno.h>

  33. #include <stdarg.h>

  34. #include <sys/mman.h>

  35. 

  36. #include <jack/types.h>

  37. #include <jack/engine.h>

  38. #include <sysdeps/time.h>

  39. 

  40. #include <sys/types.h>

  41. #include <sys/socket.h>

  42. #include <netinet/in.h>

  43. 

  44. #include "config.h"

  45. 

  46. #include <samplerate.h>

  47. 

  48. #if HAVE_CELT

  49. #include <celt/celt.h>

  50. #endif

  51. 

  52. #include "net_driver.h"

  53. #include "netjack_packet.h"

  54. 

  55. #undef DEBUG_WAKEUP

  56. 

  57. #define MIN(x,y) ((x)<(y) ? (x) : (y))

  58. 

  59. static int sync_state = TRUE;

  60. static jack_transport_state_t last_transport_state;

  61. 

  62. static int

  63. net_driver_sync_cb(jack_transport_state_t state, jack_position_t *pos, net_driver_t *driver)

  64. {

  65.     int retval = sync_state;

  66. 

  67.     if (state == JackTransportStarting && last_transport_state != JackTransportStarting) {

  68.         retval = 0;

  69.     }

  70. //    if (state == JackTransportStarting) 

  71. //		jack_info("Starting sync_state = %d", sync_state);

  72.     last_transport_state = state;

  73.     return retval;

  74. }

  75. 

  76. static jack_nframes_t

  77. net_driver_wait (net_driver_t *driver, int extra_fd, int *status, float *delayed_usecs)

  78. {

  79.     // ok... we wait for a packet on the socket

  80.     // TODO:

  81.     // we should be able to run freely if the sync source is not transmitting

  82.     // especially we should be able to compensate for packet loss somehow.

  83.     // but lets try this out first.

  84.     //

  85.     // on packet loss we should either detect an xrun or just continue running when we

  86.     // think, that the sync source is not running anymore.

  87. 

  88.     //socklen_t address_size = sizeof (struct sockaddr_in);

  89.     //int len;

  90.     int we_have_the_expected_frame = 0;

  91.     jack_nframes_t next_frame_avail;

  92.     jack_time_t packet_recv_time_stamp;

  93.     jacknet_packet_header *pkthdr = (jacknet_packet_header *) driver->rx_buf;

  94.     

  95.     if( !driver->next_deadline_valid ) {

  96. 	    if( driver->latency == 0 )

  97. 		// for full sync mode... always wait for packet.

  98. 		driver->next_deadline = jack_get_microseconds() + 500*driver->period_usecs;

  99. 	    else if( driver->latency == 1 )

  100. 		// for normal 1 period latency mode, only 1 period for dealine.

  101. 		driver->next_deadline = jack_get_microseconds() + driver->period_usecs;

  102. 	    else

  103. 		// looks like waiting 1 period always is correct.

  104. 		// not 100% sure yet. with the improved resync, it might be better,

  105. 		// to have more than one period headroom for high latency.

  106. 		//driver->next_deadline = jack_get_microseconds() + 5*driver->latency*driver->period_usecs/4;

  107. 		driver->next_deadline = jack_get_microseconds() + 2*driver->period_usecs;

  108. 

  109. 	    driver->next_deadline_valid = 1;

  110.     } else {

  111. 	    driver->next_deadline += driver->period_usecs;

  112.     }

  113. 

  114.     // Increment expected frame here.

  115.     driver->expected_framecnt += 1;

  116. 

  117.     // Now check if required packet is already in the cache.

  118.     // then poll (have deadline calculated)

  119.     // then drain socket, rinse and repeat.

  120.     while(1) {

  121. 	if( packet_cache_get_next_available_framecnt( global_packcache, driver->expected_framecnt, &next_frame_avail) ) {

  122. 	    if( next_frame_avail == driver->expected_framecnt ) {

  123. 		we_have_the_expected_frame = 1;

  124. 		break;

  125. 	    }

  126. 	}

  127. 	if( ! netjack_poll_deadline( driver->sockfd, driver->next_deadline ) )

  128. 	    break;

  129. 

  130. 	packet_cache_drain_socket( global_packcache, driver->sockfd );

  131.     }

  132. 

  133.     // check if we know who to send our packets too.

  134.     // TODO: there is still something wrong when trying

  135.     // to send back to another port on localhost.

  136.     // need to use -r on netsource for that.

  137.     if (!driver->srcaddress_valid)

  138. 	if( global_packcache->master_address_valid ) {

  139. 	    memcpy (&(driver->syncsource_address), &(global_packcache->master_address), sizeof( struct sockaddr_in ) );

  140. 	    driver->srcaddress_valid = 1;

  141. 	}

  142. 

  143.     // XXX: switching mode unconditionally is stupid.

  144.     //      if we were running free perhaps we like to behave differently

  145.     //      ie. fastforward one packet etc.

  146.     //      well... this is the first packet we see. hmm.... dunno ;S

  147.     //      it works... so...

  148.     driver->running_free = 0;

  149. 

  150.     if( we_have_the_expected_frame ) {

  151. 	driver->time_to_deadline = driver->next_deadline - jack_get_microseconds() - driver->period_usecs;

  152. 	packet_cache_retreive_packet( global_packcache, driver->expected_framecnt, (char *) driver->rx_buf, driver->rx_bufsize , &packet_recv_time_stamp);

  153. 	//int recv_time_offset = (int) (jack_get_microseconds() - packet_recv_time_stamp);

  154. 	packet_header_ntoh(pkthdr);

  155. 	driver->deadline_goodness = (int)pkthdr->sync_state;

  156. 	driver->packet_data_valid = 1;

  157. 	

  158. 	// TODO: Queue state could be taken into account.

  159. 	//       But needs more processing, cause, when we are running as

  160. 	//       fast as we can, recv_time_offset can be zero, which is

  161. 	//       good.

  162. 	//       need to add (now-deadline) and check that.

  163. 	/*

  164. 	if( recv_time_offset < driver->period_usecs )

  165. 	    //driver->next_deadline -= driver->period_usecs*driver->latency/100;

  166. 	    driver->next_deadline += driver->period_usecs/1000;

  167. 	    */

  168. 

  169. 	if( driver->deadline_goodness < 1*(int)driver->period_usecs/8*driver->latency ) {

  170. 	    driver->next_deadline -= driver->period_usecs/1000;

  171. 	    //printf( "goodness: %d, Adjust deadline: --- %d\n", driver->deadline_goodness, (int) driver->period_usecs*driver->latency/100 );

  172. 	}

  173. 	if( driver->deadline_goodness > 1*(int)driver->period_usecs/8*driver->latency ) {

  174. 	    driver->next_deadline += driver->period_usecs/1000;

  175. 	    //printf( "goodness: %d, Adjust deadline: +++ %d\n", driver->deadline_goodness, (int) driver->period_usecs*driver->latency/100 );

  176. 	}

  177.     } else {

  178. 	driver->time_to_deadline = 0;

  179. 	// bah... the packet is not there.

  180. 	// either 

  181. 	// - it got lost.

  182. 	// - its late

  183. 	// - sync source is not sending anymore.

  184. 	

  185. 	// lets check if we have the next packets, we will just run a cycle without data.

  186. 	// in that case.

  187. 	

  188. 	if( packet_cache_get_next_available_framecnt( global_packcache, driver->expected_framecnt, &next_frame_avail) ) 

  189. 	{

  190. 	    jack_nframes_t offset = next_frame_avail - driver->expected_framecnt;

  191. 

  192. 	    //if( offset < driver->resync_threshold )

  193. 	    if( offset < 10 ) {

  194. 		// ok. dont do nothing. we will run without data. 

  195. 		// this seems to be one or 2 lost packets.

  196. 		//

  197. 		// this can also be reordered packet jitter.

  198. 		// (maybe this is not happening in real live)

  199. 		//  but it happens in netem.

  200. 

  201. 		driver->packet_data_valid = 0;

  202. 

  203. 		// I also found this happening, when the packet queue, is too full.

  204. 		// but wtf ? use a smaller latency. this link can handle that ;S

  205. 		if( packet_cache_get_fill( global_packcache, driver->expected_framecnt ) > 80.0 )

  206. 		    driver->next_deadline -= driver->period_usecs/2;

  207. 

  208. 		

  209. 	    } else {

  210. 		// the diff is too high. but we have a packet in the future.

  211. 		// lets resync.

  212. 		driver->expected_framecnt = next_frame_avail;

  213. 		packet_cache_retreive_packet( global_packcache, driver->expected_framecnt, (char *) driver->rx_buf, driver->rx_bufsize, NULL );

  214. 		packet_header_ntoh(pkthdr);

  215. 		//driver->deadline_goodness = 0;

  216. 		driver->deadline_goodness = (int)pkthdr->sync_state - (int)driver->period_usecs * offset;

  217. 		driver->next_deadline_valid = 0;

  218. 		driver->packet_data_valid = 1;

  219. 	    }

  220. 	    

  221. 	} else {

  222. 	    // no packets in buffer.

  223. 	    driver->packet_data_valid = 0;

  224. 	    

  225. 	    //printf( "frame %d No Packet in queue. num_lost_packets = %d \n", driver->expected_framecnt, driver->num_lost_packets ); 

  226. 	    if( driver->num_lost_packets < 5 ) {

  227. 		// adjust deadline.

  228. 		driver->next_deadline += driver->period_usecs/8;

  229. 	    } else if( (driver->num_lost_packets <= 10) ) { 

  230. 		// lets try adjusting the deadline harder, for some packets, we might have just ran 2 fast.

  231. 		driver->next_deadline += driver->period_usecs*driver->latency/8;

  232. 	    } else {

  233. 		

  234. 		// But now we can check for any new frame available.

  235. 		// now with redundancy we would move back in most cases.

  236. 		// we dont want that.

  237. 		if( packet_cache_get_highest_available_framecnt( global_packcache, &next_frame_avail) ) {

  238. 		    driver->expected_framecnt = next_frame_avail;

  239. 		    packet_cache_retreive_packet( global_packcache, driver->expected_framecnt, (char *) driver->rx_buf, driver->rx_bufsize, NULL );

  240. 		    packet_header_ntoh(pkthdr);

  241. 		    driver->deadline_goodness = pkthdr->sync_state;

  242. 		    driver->next_deadline_valid = 0;

  243. 		    driver->packet_data_valid = 1;

  244. 		    driver->running_free = 0;

  245. 		    printf( "resync after freerun... %d\n", driver->expected_framecnt );

  246. 		} else {

  247. 		    // give up. lets run freely.

  248. 		    // XXX: hmm... 

  249. 

  250. 		    driver->running_free = 1;

  251. 

  252. 		    // when we really dont see packets.

  253. 		    // reset source address. and open possibility for new master.

  254. 		    // maybe dsl reconnect. Also restart of netsource without fix

  255. 		    // reply address changes port.

  256. 		    if (driver->num_lost_packets > 200 ) {

  257. 			driver->srcaddress_valid = 0;

  258. 			packet_cache_reset_master_address( global_packcache );

  259. 		    }

  260. 		}

  261. 	    }

  262. 	}

  263.     }

  264. 

  265.     if( !driver->packet_data_valid )

  266. 	driver->num_lost_packets += 1;

  267.     else {

  268. 	driver->num_lost_packets = 0;

  269. 	//packet_header_ntoh (pkthdr);

  270.     }

  271. 

  272. 

  273.     

  274.     driver->last_wait_ust = jack_get_microseconds ();

  275.     driver->engine->transport_cycle_start (driver->engine, driver->last_wait_ust);

  276. 

  277.     /* this driver doesn't work so well if we report a delay */

  278.     /* XXX: this might not be the case anymore */

  279.     /*      the delayed _usecs is a resync or something. */

  280.     *delayed_usecs = 0;		/* lie about it */

  281.     *status = 0;

  282.     return driver->period_size;

  283. }

  284. 

  285. static inline int

  286. net_driver_run_cycle (net_driver_t *driver)

  287. {

  288.     jack_engine_t *engine = driver->engine;

  289.     int wait_status = -1;

  290.     float delayed_usecs;

  291. 

  292.     jack_nframes_t nframes = net_driver_wait (driver, -1, &wait_status,

  293.                              &delayed_usecs);

  294. 

  295.     // XXX: xrun code removed.

  296.     //      especially with celt there are no real xruns anymore.

  297.     //      things are different on the net.

  298. 

  299.     if (wait_status == 0)

  300.         return engine->run_cycle (engine, nframes, delayed_usecs);

  301. 

  302.     if (wait_status < 0)

  303.         return -1;

  304.     else

  305.         return 0;

  306. }

  307. 

  308. static int

  309. net_driver_null_cycle (net_driver_t* driver, jack_nframes_t nframes)

  310. {

  311.     // TODO: talk to paul about this.

  312.     //       do i wait here ?

  313.     //       just sending out a packet marked with junk ?

  314. 

  315.     //int rx_size = get_sample_size(driver->bitdepth) * driver->capture_channels * driver->net_period_down + sizeof(jacknet_packet_header);

  316.     int tx_size = get_sample_size(driver->bitdepth) * driver->playback_channels * driver->net_period_up + sizeof(jacknet_packet_header);

  317.     unsigned int *packet_buf, *packet_bufX;

  318. 

  319.     packet_buf = alloca( tx_size);

  320.     jacknet_packet_header *tx_pkthdr = (jacknet_packet_header *)packet_buf;

  321.     jacknet_packet_header *rx_pkthdr = (jacknet_packet_header *)driver->rx_buf;

  322. 

  323.     //framecnt = rx_pkthdr->framecnt;

  324. 

  325.     driver->reply_port = rx_pkthdr->reply_port;

  326. 

  327.     // offset packet_bufX by the packetheader.

  328.     packet_bufX = packet_buf + sizeof(jacknet_packet_header) / sizeof(jack_default_audio_sample_t);

  329. 

  330.     tx_pkthdr->sync_state = (driver->engine->control->sync_remain <= 1);

  331. 

  332.     tx_pkthdr->framecnt = driver->expected_framecnt;

  333. 

  334.     // memset 0 the payload.

  335.     int payload_size = get_sample_size(driver->bitdepth) * driver->playback_channels * driver->net_period_up;

  336.     memset(packet_bufX, 0, payload_size);

  337. 

  338.     packet_header_hton(tx_pkthdr);

  339.     if (driver->srcaddress_valid)

  340.     {

  341. 	int r;

  342. 	if (driver->reply_port)

  343. 	    driver->syncsource_address.sin_port = htons(driver->reply_port);

  344. 

  345. 	for( r=0; r<driver->redundancy; r++ )

  346. 	    netjack_sendto(driver->outsockfd, (char *)packet_buf, tx_size,

  347. 		    0, (struct sockaddr*)&(driver->syncsource_address), sizeof(struct sockaddr_in), driver->mtu);

  348.     }

  349. 

  350.     return 0;

  351. }

  352. 

  353. static int

  354. net_driver_bufsize (net_driver_t* driver, jack_nframes_t nframes)

  355. {

  356.     if (nframes != driver->period_size)

  357.         return EINVAL;

  358. 

  359.     return 0;

  360. }

  361. 

  362. static int

  363. net_driver_read (net_driver_t* driver, jack_nframes_t nframes)

  364. {

  365.     jack_position_t local_trans_pos;

  366.     jack_transport_state_t local_trans_state;

  367. 

  368.     unsigned int *packet_buf, *packet_bufX;

  369. 

  370.     if( ! driver->packet_data_valid ) {

  371. 	render_payload_to_jack_ports (driver->bitdepth, NULL, driver->net_period_down, driver->capture_ports, driver->capture_srcs, nframes);

  372. 	return 0;

  373.     }

  374.     packet_buf = driver->rx_buf;

  375. 

  376.     jacknet_packet_header *pkthdr = (jacknet_packet_header *)packet_buf;

  377. 

  378.     packet_bufX = packet_buf + sizeof(jacknet_packet_header) / sizeof(jack_default_audio_sample_t);

  379. 

  380.     driver->reply_port = pkthdr->reply_port;

  381.     driver->latency = pkthdr->latency;

  382. 

  383.     // Special handling for latency=0

  384.     if( driver->latency == 0 )

  385. 	driver->resync_threshold = 0;

  386.     else

  387. 	driver->resync_threshold = MIN( 15, pkthdr->latency-1 );

  388. 

  389.     // check whether, we should handle the transport sync stuff, or leave trnasports untouched.

  390.     if (driver->handle_transport_sync) {

  391. 

  392.         // read local transport info....

  393.         local_trans_state = jack_transport_query(driver->client, &local_trans_pos);

  394. 

  395.         // Now check if we have to start or stop local transport to sync to remote...

  396.         switch (pkthdr->transport_state) {

  397.             case JackTransportStarting:

  398.                 // the master transport is starting... so we set our reply to the sync_callback;

  399.                 if (local_trans_state == JackTransportStopped) {

  400.                     jack_transport_start(driver->client);

  401.                     last_transport_state = JackTransportStopped;

  402.                     sync_state = FALSE;

  403.                     jack_info("locally stopped... starting...");

  404.                 }

  405. 

  406.                 if (local_trans_pos.frame != (pkthdr->transport_frame + (pkthdr->latency) * nframes)) {

  407.                     jack_transport_locate(driver->client, (pkthdr->transport_frame + (pkthdr->latency) * nframes));

  408.                     last_transport_state = JackTransportRolling;

  409.                     sync_state = FALSE;

  410.                     jack_info("starting locate to %d", pkthdr->transport_frame + (pkthdr->latency)*nframes);

  411.                 }

  412.                 break;

  413.             case JackTransportStopped:

  414.                 sync_state = TRUE;

  415.                 if (local_trans_pos.frame != (pkthdr->transport_frame)) {

  416.                     jack_transport_locate(driver->client, (pkthdr->transport_frame));

  417.                     jack_info("transport is stopped locate to %d", pkthdr->transport_frame);

  418.                 }

  419.                 if (local_trans_state != JackTransportStopped)

  420.                     jack_transport_stop(driver->client);

  421.                 break;

  422.             case JackTransportRolling:

  423.                 sync_state = TRUE;

  424. //		    		if(local_trans_pos.frame != (pkthdr->transport_frame + (pkthdr->latency) * nframes)) {

  425. //				    jack_transport_locate(driver->client, (pkthdr->transport_frame + (pkthdr->latency + 2) * nframes));

  426. //				    jack_info("running locate to %d", pkthdr->transport_frame + (pkthdr->latency)*nframes);

  427. //		    		}

  428.                 if (local_trans_state != JackTransportRolling)

  429.                     jack_transport_start (driver->client);

  430.                 break;

  431. 

  432.             case JackTransportLooping:

  433.                 break;

  434.         }

  435.     }

  436. 

  437.     render_payload_to_jack_ports (driver->bitdepth, packet_bufX, driver->net_period_down, driver->capture_ports, driver->capture_srcs, nframes);

  438. 

  439.     return 0;

  440. }

  441. 

  442. static int

  443. net_driver_write (net_driver_t* driver, jack_nframes_t nframes)

  444. {

  445.     uint32_t *packet_buf, *packet_bufX;

  446. 

  447.     int packet_size = get_sample_size(driver->bitdepth) * driver->playback_channels * driver->net_period_up + sizeof(jacknet_packet_header);

  448.     jacknet_packet_header *pkthdr; 

  449. 

  450.     packet_buf = alloca(packet_size);

  451.     pkthdr = (jacknet_packet_header *)packet_buf;

  452. 

  453.     if( driver->running_free ) {

  454. 	return 0;

  455.     }

  456. 

  457.     // offset packet_bufX by the packetheader.

  458.     packet_bufX = packet_buf + sizeof(jacknet_packet_header) / sizeof(jack_default_audio_sample_t);

  459. 

  460.     pkthdr->sync_state = (driver->engine->control->sync_remain <= 1);

  461.     pkthdr->latency = driver->time_to_deadline;

  462.     //printf( "time to deadline = %d  goodness=%d\n", (int)driver->time_to_deadline, driver->deadline_goodness );

  463.     pkthdr->framecnt = driver->expected_framecnt;

  464. 

  465. 

  466.     render_jack_ports_to_payload(driver->bitdepth, driver->playback_ports, driver->playback_srcs, nframes, packet_bufX, driver->net_period_up);

  467. 

  468.     packet_header_hton(pkthdr);

  469.     if (driver->srcaddress_valid)

  470.     {

  471. 	int r;

  472.         if (driver->reply_port)

  473.             driver->syncsource_address.sin_port = htons(driver->reply_port);

  474. 

  475. 	for( r=0; r<driver->redundancy; r++ )

  476. 	    netjack_sendto(driver->outsockfd, (char *)packet_buf, packet_size,

  477. 		    MSG_CONFIRM, (struct sockaddr*)&(driver->syncsource_address), sizeof(struct sockaddr_in), driver->mtu);

  478.     }

  479. 

  480.     return 0;

  481. }

  482. 

  483. 

  484. static int

  485. net_driver_attach (net_driver_t *driver)

  486. {

  487.     //puts ("net_driver_attach");

  488.     jack_port_t * port;

  489.     char buf[32];

  490.     unsigned int chn;

  491.     int port_flags;

  492. 

  493.     driver->engine->set_buffer_size (driver->engine, driver->period_size);

  494.     driver->engine->set_sample_rate (driver->engine, driver->sample_rate);

  495. 

  496.     if (driver->handle_transport_sync)

  497.         jack_set_sync_callback(driver->client, (JackSyncCallback) net_driver_sync_cb, driver);

  498. 

  499.     port_flags = JackPortIsOutput | JackPortIsPhysical | JackPortIsTerminal;

  500. 

  501.     for (chn = 0; chn < driver->capture_channels_audio; chn++) {

  502.         snprintf (buf, sizeof(buf) - 1, "capture_%u", chn + 1);

  503. 

  504.         port = jack_port_register (driver->client, buf,

  505.                                    JACK_DEFAULT_AUDIO_TYPE,

  506.                                    port_flags, 0);

  507.         if (!port) {

  508.             jack_error ("NET: cannot register port for %s", buf);

  509.             break;

  510.         }

  511. 

  512.         driver->capture_ports =

  513.             jack_slist_append (driver->capture_ports, port);

  514. 

  515. 	if( driver->bitdepth == 1000 ) {

  516. #if HAVE_CELT

  517. 	    // XXX: memory leak

  518. 	    CELTMode *celt_mode = celt_mode_create( driver->sample_rate, 1, driver->period_size, NULL );

  519. 	    driver->capture_srcs = jack_slist_append(driver->capture_srcs, celt_decoder_create( celt_mode ) );

  520. #endif

  521. 	} else {

  522. 	    driver->capture_srcs = jack_slist_append(driver->capture_srcs, src_new(SRC_LINEAR, 1, NULL));

  523. 	}

  524.     }

  525.     for (chn = driver->capture_channels_audio; chn < driver->capture_channels; chn++) {

  526.         snprintf (buf, sizeof(buf) - 1, "capture_%u", chn + 1);

  527. 

  528.         port = jack_port_register (driver->client, buf,

  529.                                    JACK_DEFAULT_MIDI_TYPE,

  530.                                    port_flags, 0);

  531.         if (!port) {

  532.             jack_error ("NET: cannot register port for %s", buf);

  533.             break;

  534.         }

  535. 

  536.         driver->capture_ports =

  537.             jack_slist_append (driver->capture_ports, port);

  538.         //driver->capture_srcs = jack_slist_append(driver->capture_srcs, src_new(SRC_LINEAR, 1, NULL));

  539.     }

  540. 

  541.     port_flags = JackPortIsInput | JackPortIsPhysical | JackPortIsTerminal;

  542. 

  543.     for (chn = 0; chn < driver->playback_channels_audio; chn++) {

  544.         snprintf (buf, sizeof(buf) - 1, "playback_%u", chn + 1);

  545. 

  546.         port = jack_port_register (driver->client, buf,

  547.                                    JACK_DEFAULT_AUDIO_TYPE,

  548.                                    port_flags, 0);

  549. 

  550.         if (!port) {

  551.             jack_error ("NET: cannot register port for %s", buf);

  552.             break;

  553.         }

  554. 

  555.         driver->playback_ports =

  556.             jack_slist_append (driver->playback_ports, port);

  557. 	if( driver->bitdepth == 1000 ) {

  558. #if HAVE_CELT

  559. 	    // XXX: memory leak

  560. 	    CELTMode *celt_mode = celt_mode_create( driver->sample_rate, 1, driver->period_size, NULL );

  561. 	    driver->playback_srcs = jack_slist_append(driver->playback_srcs, celt_encoder_create( celt_mode ) );

  562. #endif

  563. 	} else {

  564. 	    driver->playback_srcs = jack_slist_append(driver->playback_srcs, src_new(SRC_LINEAR, 1, NULL));

  565. 	}

  566.     }

  567.     for (chn = driver->playback_channels_audio; chn < driver->playback_channels; chn++) {

  568.         snprintf (buf, sizeof(buf) - 1, "playback_%u", chn + 1);

  569. 

  570.         port = jack_port_register (driver->client, buf,

  571.                                    JACK_DEFAULT_MIDI_TYPE,

  572.                                    port_flags, 0);

  573. 

  574.         if (!port) {

  575.             jack_error ("NET: cannot register port for %s", buf);

  576.             break;

  577.         }

  578. 

  579.         driver->playback_ports =

  580.             jack_slist_append (driver->playback_ports, port);

  581.         //driver->playback_srcs = jack_slist_append(driver->playback_srcs, src_new(SRC_LINEAR, 1, NULL));

  582.     }

  583. 

  584.     jack_activate (driver->client);

  585.     return 0;

  586. }

  587. 

  588. static int

  589. net_driver_detach (net_driver_t *driver)

  590. {

  591.     JSList * node;

  592. 

  593.     if (driver->engine == 0)

  594.         return 0;

  595. //#if 0

  596.     for (node = driver->capture_ports; node; node = jack_slist_next (node))

  597.         jack_port_unregister (driver->client,

  598.                               ((jack_port_t *) node->data));

  599. 

  600.     jack_slist_free (driver->capture_ports);

  601.     driver->capture_ports = NULL;

  602. //#endif

  603. 

  604.     for (node = driver->playback_ports; node; node = jack_slist_next (node))

  605.         jack_port_unregister (driver->client,

  606.                               ((jack_port_t *) node->data));

  607. 

  608.     jack_slist_free (driver->playback_ports);

  609.     driver->playback_ports = NULL;

  610. 

  611.     return 0;

  612. }

  613. 

  614. static void

  615. net_driver_delete (net_driver_t *driver)

  616. {

  617.     jack_driver_nt_finish ((jack_driver_nt_t *) driver);

  618.     free (driver);

  619. }

  620. 

  621. static jack_driver_t *

  622. net_driver_new (jack_client_t * client,

  623.                 char *name,

  624.                 unsigned int capture_ports,

  625.                 unsigned int playback_ports,

  626.                 unsigned int capture_ports_midi,

  627.                 unsigned int playback_ports_midi,

  628.                 jack_nframes_t sample_rate,

  629.                 jack_nframes_t period_size,

  630.                 unsigned int listen_port,

  631.                 unsigned int transport_sync,

  632.                 unsigned int resample_factor,

  633.                 unsigned int resample_factor_up,

  634.                 unsigned int bitdepth,

  635. 		unsigned int use_autoconfig,

  636. 		unsigned int latency,

  637. 		unsigned int redundancy)

  638. {

  639.     net_driver_t * driver;

  640.     int first_pack_len;

  641.     struct sockaddr_in address;

  642. 

  643.     jack_info ("creating net driver ... %s|%" PRIu32 "|%" PRIu32

  644.             "|%u|%u|%u|transport_sync:%u", name, sample_rate, period_size, listen_port,

  645.             capture_ports, playback_ports, transport_sync);

  646. 

  647.     driver = (net_driver_t *) calloc (1, sizeof (net_driver_t));

  648. 

  649.     jack_driver_nt_init ((jack_driver_nt_t *) driver);

  650. 

  651.     driver->write         = (JackDriverWriteFunction)      net_driver_write;

  652.     driver->read          = (JackDriverReadFunction)       net_driver_read;

  653.     driver->null_cycle    = (JackDriverNullCycleFunction)  net_driver_null_cycle;

  654.     driver->nt_attach     = (JackDriverNTAttachFunction)   net_driver_attach;

  655.     driver->nt_detach     = (JackDriverNTDetachFunction)   net_driver_detach;

  656.     driver->nt_bufsize    = (JackDriverNTBufSizeFunction)  net_driver_bufsize;

  657.     driver->nt_run_cycle  = (JackDriverNTRunCycleFunction) net_driver_run_cycle;

  658. 

  659.     // Fill in driver values.

  660.     // might be subject to autoconfig...

  661.     // so dont calculate anything with them...

  662. 

  663.     driver->sample_rate = sample_rate;

  664.     driver->period_size = period_size;

  665. 

  666.     driver->listen_port   = listen_port;

  667.     driver->last_wait_ust = 0;

  668. 

  669.     driver->capture_channels  = capture_ports + capture_ports_midi;

  670.     driver->capture_channels_audio  = capture_ports;

  671.     driver->capture_channels_midi   = capture_ports_midi;

  672.     driver->capture_ports     = NULL;

  673.     driver->playback_channels = playback_ports + playback_ports_midi;

  674.     driver->playback_channels_audio = playback_ports;

  675.     driver->playback_channels_midi = playback_ports_midi;

  676.     driver->playback_ports    = NULL;

  677. 

  678.     driver->handle_transport_sync = transport_sync;

  679.     driver->mtu = 1400;

  680.     driver->latency = latency;

  681.     driver->redundancy = redundancy;

  682. 

  683. 

  684.     driver->client = client;

  685.     driver->engine = NULL;

  686. 

  687. 

  688.     if ((bitdepth != 0) && (bitdepth != 8) && (bitdepth != 16) && (bitdepth != 1000))

  689.     {

  690.         jack_info ("Invalid bitdepth: %d (8, 16 or 0 for float) !!!", bitdepth);

  691.         return NULL;

  692.     }

  693.     driver->bitdepth = bitdepth;

  694. 

  695. 

  696.     if (resample_factor_up == 0)

  697.         resample_factor_up = resample_factor;

  698. 

  699.     // Now open the socket, and wait for the first packet to arrive...

  700.     driver->sockfd = socket (PF_INET, SOCK_DGRAM, 0);

  701.     if (driver->sockfd == -1)

  702.     {

  703.         jack_info ("socket error");

  704.         return NULL;

  705.     }

  706.     address.sin_family = AF_INET;

  707.     address.sin_port = htons(driver->listen_port);

  708.     address.sin_addr.s_addr = htonl(INADDR_ANY);

  709.     if (bind (driver->sockfd, (struct sockaddr *) &address, sizeof (address)) < 0)

  710.     {

  711.         jack_info("bind error");

  712.         return NULL;

  713.     }

  714. 

  715.     driver->outsockfd = socket (PF_INET, SOCK_DGRAM, 0);

  716.     if (driver->outsockfd == -1)

  717.     {

  718.         jack_info ("socket error");

  719.         return NULL;

  720.     }

  721.     driver->srcaddress_valid = 0;

  722. 

  723.     if (use_autoconfig)

  724.     {

  725. 	jacknet_packet_header *first_packet = alloca (sizeof (jacknet_packet_header));

  726. 	socklen_t address_size = sizeof (struct sockaddr_in);

  727. 

  728. 	jack_info ("Waiting for an incoming packet !!!");

  729. 	jack_info ("*** IMPORTANT *** Dont connect a client to jackd until the driver is attached to a clock source !!!");

  730. 

  731. 	// XXX: netjack_poll polls forever.

  732. 	//      thats ok here.

  733. 	if (netjack_poll (driver->sockfd, 500))

  734. 	    first_pack_len = recvfrom (driver->sockfd, first_packet, sizeof (jacknet_packet_header), 0, (struct sockaddr*) & driver->syncsource_address, &address_size);

  735. 	else

  736. 	    first_pack_len = 0;

  737. 

  738. 	driver->srcaddress_valid = 1;

  739. 

  740. 	if (first_pack_len == sizeof (jacknet_packet_header))

  741. 	{

  742. 	    packet_header_ntoh (first_packet);

  743. 

  744. 	    jack_info ("AutoConfig Override !!!");

  745. 	    if (driver->sample_rate != first_packet->sample_rate)

  746. 	    {

  747. 		jack_info ("AutoConfig Override: Master JACK sample rate = %d", first_packet->sample_rate);

  748. 		driver->sample_rate = first_packet->sample_rate;

  749. 	    }

  750. 

  751. 	    if (driver->period_size != first_packet->period_size)

  752. 	    {

  753. 		jack_info ("AutoConfig Override: Master JACK period size is %d", first_packet->period_size);

  754. 		driver->period_size = first_packet->period_size;

  755. 	    }

  756. 	    if (driver->capture_channels_audio != first_packet->capture_channels_audio)

  757. 	    {

  758. 		jack_info ("AutoConfig Override: capture_channels_audio = %d", first_packet->capture_channels_audio);

  759. 		driver->capture_channels_audio = first_packet->capture_channels_audio;

  760. 	    }

  761. 	    if (driver->capture_channels_midi != first_packet->capture_channels_midi)

  762. 	    {

  763. 		jack_info ("AutoConfig Override: capture_channels_midi = %d", first_packet->capture_channels_midi);

  764. 		driver->capture_channels_midi = first_packet->capture_channels_midi;

  765. 	    }

  766. 	    if (driver->playback_channels_audio != first_packet->playback_channels_audio)

  767. 	    {

  768. 		jack_info ("AutoConfig Override: playback_channels_audio = %d", first_packet->playback_channels_audio);

  769. 		driver->playback_channels_audio = first_packet->playback_channels_audio;

  770. 	    }

  771. 	    if (driver->playback_channels_midi != first_packet->playback_channels_midi)

  772. 	    {

  773. 		jack_info ("AutoConfig Override: playback_channels_midi = %d", first_packet->playback_channels_midi);

  774. 		driver->playback_channels_midi = first_packet->playback_channels_midi;

  775. 	    }

  776. 

  777. 	    driver->mtu = first_packet->mtu;

  778. 	    jack_info ("MTU is set to %d bytes", first_packet->mtu);

  779. 	    driver->latency = first_packet->latency;

  780. 	}

  781.     }

  782.     driver->capture_channels  = driver->capture_channels_audio + driver->capture_channels_midi;

  783.     driver->playback_channels = driver->playback_channels_audio + driver->playback_channels_midi;

  784. 

  785.     // After possible Autoconfig: do all calculations...

  786.     driver->period_usecs =

  787.         (jack_time_t) floor ((((float) driver->period_size) / (float)driver->sample_rate)

  788.                              * 1000000.0f);

  789. 

  790.     if( driver->bitdepth == 1000 ) {

  791. 	// celt mode. 

  792. 	// TODO: this is a hack. But i dont want to change the packet header.

  793. 	driver->net_period_down = resample_factor;

  794. 	driver->net_period_up = resample_factor_up;

  795.     } else {

  796. 	driver->net_period_down = (float) driver->period_size / (float) resample_factor;

  797. 	driver->net_period_up = (float) driver->period_size / (float) resample_factor_up;

  798.     }

  799. 

  800.     driver->rx_bufsize = sizeof (jacknet_packet_header) + driver->net_period_down * driver->capture_channels * get_sample_size (driver->bitdepth);

  801.     driver->rx_buf = malloc (driver->rx_bufsize);

  802.     driver->pkt_buf = malloc (driver->rx_bufsize);

  803.     global_packcache = packet_cache_new (driver->latency + 5, driver->rx_bufsize, driver->mtu);

  804. 

  805.     driver->expected_framecnt_valid = 0;

  806.     driver->num_lost_packets = 0;

  807.     driver->next_deadline_valid = 0;

  808.     driver->deadline_goodness = 0;

  809.     driver->time_to_deadline = 0;

  810. 

  811.     // Special handling for latency=0

  812.     if( driver->latency == 0 )

  813. 	driver->resync_threshold = 0;

  814.     else

  815. 	driver->resync_threshold = MIN( 15, driver->latency-1 );

  816. 

  817.     driver->running_free = 0;

  818. 

  819.     jack_info ("netjack: period   : up: %d / dn: %d", driver->net_period_up, driver->net_period_down);

  820.     jack_info ("netjack: framerate: %d", driver->sample_rate);

  821.     jack_info ("netjack: audio    : cap: %d / pbk: %d)", driver->capture_channels_audio, driver->playback_channels_audio);

  822.     jack_info ("netjack: midi     : cap: %d / pbk: %d)", driver->capture_channels_midi, driver->playback_channels_midi);

  823.     jack_info ("netjack: buffsize : rx: %d)", driver->rx_bufsize);

  824.     return (jack_driver_t *) driver;

  825. }

  826. 

  827. /* DRIVER "PLUGIN" INTERFACE */

  828. 

  829. jack_driver_desc_t *

  830. driver_get_descriptor ()

  831. {

  832.     jack_driver_desc_t * desc;

  833.     jack_driver_param_desc_t * params;

  834.     unsigned int i;

  835. 

  836.     desc = calloc (1, sizeof (jack_driver_desc_t));

  837.     strcpy (desc->name, "net");

  838.     desc->nparams = 15;

  839. 

  840.     params = calloc (desc->nparams, sizeof (jack_driver_param_desc_t));

  841. 

  842.     i = 0;

  843.     strcpy (params[i].name, "inchannels");

  844.     params[i].character  = 'i';

  845.     params[i].type       = JackDriverParamUInt;

  846.     params[i].value.ui   = 2U;

  847.     strcpy (params[i].short_desc, "Number of capture channels (defaults to 2)");

  848.     strcpy (params[i].long_desc, params[i].short_desc);

  849. 

  850.     i++;

  851.     strcpy (params[i].name, "outchannels");

  852.     params[i].character  = 'o';

  853.     params[i].type       = JackDriverParamUInt;

  854.     params[i].value.ui   = 2U;

  855.     strcpy (params[i].short_desc, "Number of playback channels (defaults to 2)");

  856.     strcpy (params[i].long_desc, params[i].short_desc);

  857. 

  858.     i++;

  859.     strcpy (params[i].name, "midi inchannels");

  860.     params[i].character  = 'I';

  861.     params[i].type       = JackDriverParamUInt;

  862.     params[i].value.ui   = 1U;

  863.     strcpy (params[i].short_desc, "Number of midi capture channels (defaults to 1)");

  864.     strcpy (params[i].long_desc, params[i].short_desc);

  865. 

  866.     i++;

  867.     strcpy (params[i].name, "midi outchannels");

  868.     params[i].character  = 'O';

  869.     params[i].type       = JackDriverParamUInt;

  870.     params[i].value.ui   = 1U;

  871.     strcpy (params[i].short_desc, "Number of midi playback channels (defaults to 1)");

  872.     strcpy (params[i].long_desc, params[i].short_desc);

  873. 

  874.     i++;

  875.     strcpy (params[i].name, "rate");

  876.     params[i].character  = 'r';

  877.     params[i].type       = JackDriverParamUInt;

  878.     params[i].value.ui   = 48000U;

  879.     strcpy (params[i].short_desc, "Sample rate");

  880.     strcpy (params[i].long_desc, params[i].short_desc);

  881. 

  882.     i++;

  883.     strcpy (params[i].name, "period");

  884.     params[i].character  = 'p';

  885.     params[i].type       = JackDriverParamUInt;

  886.     params[i].value.ui   = 1024U;

  887.     strcpy (params[i].short_desc, "Frames per period");

  888.     strcpy (params[i].long_desc, params[i].short_desc);

  889. 

  890.     i++;

  891.     strcpy (params[i].name, "listen-port");

  892.     params[i].character  = 'l';

  893.     params[i].type       = JackDriverParamUInt;

  894.     params[i].value.ui   = 3000U;

  895.     strcpy (params[i].short_desc,

  896.             "The socket port we are listening on for sync packets");

  897.     strcpy (params[i].long_desc, params[i].short_desc);

  898. 

  899.     i++;

  900.     strcpy (params[i].name, "factor");

  901.     params[i].character  = 'f';

  902.     params[i].type       = JackDriverParamUInt;

  903.     params[i].value.ui   = 1U;

  904.     strcpy (params[i].short_desc,

  905.             "Factor for sample rate reduction");

  906.     strcpy (params[i].long_desc, params[i].short_desc);

  907. 

  908.     i++;

  909.     strcpy (params[i].name, "upstream-factor");

  910.     params[i].character  = 'u';

  911.     params[i].type       = JackDriverParamUInt;

  912.     params[i].value.ui   = 0U;

  913.     strcpy (params[i].short_desc,

  914.             "Factor for sample rate reduction on the upstream");

  915.     strcpy (params[i].long_desc, params[i].short_desc);

  916. 

  917.     i++;

  918.     strcpy (params[i].name, "celt");

  919.     params[i].character  = 'c';

  920.     params[i].type       = JackDriverParamUInt;

  921.     params[i].value.ui   = 0U;

  922.     strcpy (params[i].short_desc,

  923.             "sets celt encoding and number of bytes per channel");

  924.     strcpy (params[i].long_desc, params[i].short_desc);

  925. 

  926.     i++;

  927.     strcpy (params[i].name, "bit-depth");

  928.     params[i].character  = 'b';

  929.     params[i].type       = JackDriverParamUInt;

  930.     params[i].value.ui   = 0U;

  931.     strcpy (params[i].short_desc,

  932.             "Sample bit-depth (0 for float, 8 for 8bit and 16 for 16bit)");

  933.     strcpy (params[i].long_desc, params[i].short_desc);

  934. 

  935.     i++;

  936.     strcpy (params[i].name, "transport-sync");

  937.     params[i].character  = 't';

  938.     params[i].type       = JackDriverParamUInt;

  939.     params[i].value.ui   = 1U;

  940.     strcpy (params[i].short_desc,

  941.             "Whether to slave the transport to the master transport");

  942.     strcpy (params[i].long_desc, params[i].short_desc);

  943. 

  944.     i++;

  945.     strcpy (params[i].name, "autoconf");

  946.     params[i].character  = 'a';

  947.     params[i].type       = JackDriverParamUInt;

  948.     params[i].value.ui   = 1U;

  949.     strcpy (params[i].short_desc,

  950.             "Whether to use Autoconfig, or just start.");

  951.     strcpy (params[i].long_desc, params[i].short_desc);

  952. 

  953.     i++;

  954.     strcpy (params[i].name, "latency");

  955.     params[i].character  = 'L';

  956.     params[i].type       = JackDriverParamUInt;

  957.     params[i].value.ui   = 5U;

  958.     strcpy (params[i].short_desc,

  959.             "Latency setting");

  960.     strcpy (params[i].long_desc, params[i].short_desc);

  961. 

  962.     i++;

  963.     strcpy (params[i].name, "redundancy");

  964.     params[i].character  = 'R';

  965.     params[i].type       = JackDriverParamUInt;

  966.     params[i].value.ui   = 1U;

  967.     strcpy (params[i].short_desc,

  968.             "Send packets N times");

  969.     strcpy (params[i].long_desc, params[i].short_desc);

  970. 

  971.     desc->params = params;

  972. 

  973.     return desc;

  974. }

  975. 

  976. const char driver_client_name[] = "net_pcm";

  977. 

  978. jack_driver_t *

  979. driver_initialize (jack_client_t *client, const JSList * params)

  980. {

  981.     jack_nframes_t sample_rate = 48000;

  982.     jack_nframes_t resample_factor = 1;

  983.     jack_nframes_t period_size = 1024;

  984.     unsigned int capture_ports = 2;

  985.     unsigned int playback_ports = 2;

  986.     unsigned int capture_ports_midi = 1;

  987.     unsigned int playback_ports_midi = 1;

  988.     unsigned int listen_port = 3000;

  989.     unsigned int resample_factor_up = 0;

  990.     unsigned int bitdepth = 0;

  991.     unsigned int handle_transport_sync = 1;

  992.     unsigned int use_autoconfig = 1;

  993.     unsigned int latency = 5;

  994.     unsigned int redundancy = 1;

  995.     const JSList * node;

  996.     const jack_driver_param_t * param;

  997. 

  998.     for (node = params; node; node = jack_slist_next (node)) {

  999.         param = (const jack_driver_param_t *) node->data;

  1000. 

  1001.         switch (param->character) {

  1002. 

  1003.             case 'i':

  1004.                 capture_ports = param->value.ui;

  1005.                 break;

  1006. 

  1007.             case 'o':

  1008.                 playback_ports = param->value.ui;

  1009.                 break;

  1010. 

  1011.             case 'I':

  1012.                 capture_ports_midi = param->value.ui;

  1013.                 break;

  1014. 

  1015.             case 'O':

  1016.                 playback_ports_midi = param->value.ui;

  1017.                 break;

  1018. 

  1019.             case 'r':

  1020.                 sample_rate = param->value.ui;

  1021.                 break;

  1022. 

  1023.             case 'p':

  1024.                 period_size = param->value.ui;

  1025.                 break;

  1026. 

  1027.             case 'l':

  1028.                 listen_port = param->value.ui;

  1029.                 break;

  1030. 

  1031.             case 'f':

  1032.                 resample_factor = param->value.ui;

  1033.                 break;

  1034. 

  1035.             case 'u':

  1036.                 resample_factor_up = param->value.ui;

  1037.                 break;

  1038. 

  1039.             case 'b':

  1040.                 bitdepth = param->value.ui;

  1041.                 break;

  1042. 

  1043. 	    case 'c':

  1044. #if HAVE_CELT

  1045. 		bitdepth = 1000;

  1046. 		resample_factor = param->value.ui;

  1047. #else

  1048. 		printf( "not built with celt support\n" );

  1049. 		exit(10);

  1050. #endif

  1051. 		break;

  1052. 

  1053.             case 't':

  1054.                 handle_transport_sync = param->value.ui;

  1055.                 break;

  1056. 

  1057.             case 'a':

  1058.                 use_autoconfig = param->value.ui;

  1059.                 break;

  1060. 

  1061.             case 'L':

  1062.                 latency = param->value.ui;

  1063.                 break;

  1064. 

  1065.             case 'R':

  1066.                 redundancy = param->value.ui;

  1067.                 break;

  1068.         }

  1069.     }

  1070. 

  1071.     return net_driver_new (client, "net_pcm", capture_ports, playback_ports,

  1072.                            capture_ports_midi, playback_ports_midi,

  1073.                            sample_rate, period_size,

  1074.                            listen_port, handle_transport_sync,

  1075.                            resample_factor, resample_factor_up, bitdepth,

  1076. 			   use_autoconfig, latency, redundancy);

  1077. }

  1078. 

  1079. void

  1080. driver_finish (jack_driver_t *driver)

  1081. {

  1082.     net_driver_delete ((net_driver_t *) driver);

  1083. }