/[svn]/liblscp/trunk/src/client.c
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Annotation of /liblscp/trunk/src/client.c

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Revision 948 - (hide annotations) (download)
Tue Nov 28 15:31:20 2006 UTC (17 years, 4 months ago) by capela
File MIME type: text/plain
File size: 63101 byte(s)
* Fixed some compilation warnings due to suspicious type
  casting and unsused header macros.

* Changed deprecated copyright attribute to license
  and added ldconfig to post-(un)install steps
  to liblscp.spec (RPM).

1 capela 107 // client.c
2     //
3     /****************************************************************************
4     liblscp - LinuxSampler Control Protocol API
5 capela 869 Copyright (C) 2004-2006, rncbc aka Rui Nuno Capela. All rights reserved.
6 capela 107
7     This library is free software; you can redistribute it and/or
8     modify it under the terms of the GNU Lesser General Public
9     License as published by the Free Software Foundation; either
10     version 2.1 of the License, or (at your option) any later version.
11    
12     This library is distributed in the hope that it will be useful,
13     but WITHOUT ANY WARRANTY; without even the implied warranty of
14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15     Lesser General Public License for more details.
16    
17 capela 921 You should have received a copy of the GNU General Public License along
18     with this program; if not, write to the Free Software Foundation, Inc.,
19     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 capela 107
21     *****************************************************************************/
22    
23     #include "common.h"
24    
25     // Default timeout value (in milliseconds).
26     #define LSCP_TIMEOUT_MSECS 500
27    
28    
29     // Local prototypes.
30    
31 capela 144 static void _lscp_client_evt_proc (void *pvClient);
32 capela 107
33 capela 144 static lscp_status_t _lscp_client_evt_connect (lscp_client_t *pClient);
34     static lscp_status_t _lscp_client_evt_request (lscp_client_t *pClient, int iSubscribe, lscp_event_t event);
35 capela 107
36 capela 144
37 capela 107 //-------------------------------------------------------------------------
38 capela 132 // Event service (datagram oriented).
39 capela 107
40 capela 132 static void _lscp_client_evt_proc ( void *pvClient )
41 capela 107 {
42     lscp_client_t *pClient = (lscp_client_t *) pvClient;
43 capela 562
44 capela 177 fd_set fds; // File descriptor list for select().
45     int fd, fdmax; // Maximum file descriptor number.
46     struct timeval tv; // For specifying a timeout value.
47     int iSelect; // Holds select return status.
48     int iTimeout;
49 capela 562
50 capela 177 char achBuffer[LSCP_BUFSIZ];
51     int cchBuffer;
52 capela 144 const char *pszSeps = ":\r\n";
53 capela 177 char * pszToken;
54     char * pch;
55     int cchToken;
56 capela 146 lscp_event_t event;
57 capela 107
58     #ifdef DEBUG
59 capela 132 fprintf(stderr, "_lscp_client_evt_proc: Client waiting for events.\n");
60 capela 107 #endif
61    
62 capela 132 while (pClient->evt.iState) {
63 capela 177
64     // Prepare for waiting on select...
65     fd = (int) pClient->evt.sock;
66     FD_ZERO(&fds);
67     FD_SET((unsigned int) fd, &fds);
68     fdmax = fd;
69    
70     // Use the timeout (x10) select feature ...
71     iTimeout = 10 * pClient->iTimeout;
72 capela 625 if (iTimeout >= 1000) {
73 capela 177 tv.tv_sec = iTimeout / 1000;
74     iTimeout -= tv.tv_sec * 1000;
75     }
76     else tv.tv_sec = 0;
77     tv.tv_usec = iTimeout * 1000;
78    
79 capela 144 // Wait for event...
80 capela 177 iSelect = select(fdmax + 1, &fds, NULL, NULL, &tv);
81     if (iSelect > 0 && FD_ISSET(fd, &fds)) {
82     // May recv now...
83     cchBuffer = recv(pClient->evt.sock, achBuffer, sizeof(achBuffer), 0);
84     if (cchBuffer > 0) {
85     // Make sure received buffer it's null terminated.
86     achBuffer[cchBuffer] = (char) 0;
87     // Parse for the notification event message...
88     pszToken = lscp_strtok(achBuffer, pszSeps, &(pch)); // Have "NOTIFY".
89     if (strcasecmp(pszToken, "NOTIFY") == 0) {
90     pszToken = lscp_strtok(NULL, pszSeps, &(pch));
91     event = lscp_event_from_text(pszToken);
92     // And pick the rest of data...
93     pszToken = lscp_strtok(NULL, pszSeps, &(pch));
94     cchToken = (pszToken == NULL ? 0 : strlen(pszToken));
95     // Double-check if we're really up to it...
96     if (pClient->events & event) {
97     // Invoke the client event callback...
98     if ((*pClient->pfnCallback)(
99     pClient,
100     event,
101     pszToken,
102     cchToken,
103     pClient->pvData) != LSCP_OK) {
104     pClient->evt.iState = 0;
105     }
106 capela 107 }
107     }
108 capela 177 } else {
109     lscp_socket_perror("_lscp_client_evt_proc: recv");
110     pClient->evt.iState = 0;
111 capela 107 }
112 capela 177 } // Check if select has in error.
113     else if (iSelect < 0) {
114 capela 370 lscp_socket_perror("_lscp_client_evt_proc: select");
115 capela 132 pClient->evt.iState = 0;
116 capela 107 }
117 capela 562
118 capela 177 // Finally, always signal the event.
119     lscp_cond_signal(pClient->cond);
120 capela 107 }
121    
122     #ifdef DEBUG
123 capela 132 fprintf(stderr, "_lscp_client_evt_proc: Client closing.\n");
124 capela 107 #endif
125     }
126    
127    
128     //-------------------------------------------------------------------------
129 capela 144 // Event subscription helpers.
130    
131     // Open the event service socket connection.
132     static lscp_status_t _lscp_client_evt_connect ( lscp_client_t *pClient )
133     {
134     lscp_socket_t sock;
135     struct sockaddr_in addr;
136     int cAddr;
137     #if defined(WIN32)
138     int iSockOpt = (-1);
139     #endif
140    
141     // Prepare the event connection socket...
142     sock = socket(AF_INET, SOCK_STREAM, 0);
143     if (sock == INVALID_SOCKET) {
144     lscp_socket_perror("_lscp_client_evt_connect: socket");
145     return LSCP_FAILED;
146     }
147    
148     #if defined(WIN32)
149     if (setsockopt(sock, SOL_SOCKET, SO_DONTLINGER, (char *) &iSockOpt, sizeof(int)) == SOCKET_ERROR)
150     lscp_socket_perror("lscp_client_evt_connect: setsockopt(SO_DONTLINGER)");
151     #endif
152    
153     #ifdef DEBUG
154     lscp_socket_getopts("_lscp_client_evt_connect:", sock);
155     #endif
156    
157     // Use same address of the command connection.
158     cAddr = sizeof(struct sockaddr_in);
159     memmove((char *) &addr, &(pClient->cmd.addr), cAddr);
160    
161     // Start the connection...
162     if (connect(sock, (struct sockaddr *) &addr, cAddr) == SOCKET_ERROR) {
163     lscp_socket_perror("_lscp_client_evt_connect: connect");
164     closesocket(sock);
165     return LSCP_FAILED;
166     }
167 capela 562
168 capela 144 // Set our socket agent struct...
169     lscp_socket_agent_init(&(pClient->evt), sock, &addr, cAddr);
170 capela 562
171 capela 144 // And finally the service thread...
172     return lscp_socket_agent_start(&(pClient->evt), _lscp_client_evt_proc, pClient, 0);
173     }
174    
175    
176     // Subscribe to a single event.
177     static lscp_status_t _lscp_client_evt_request ( lscp_client_t *pClient, int iSubscribe, lscp_event_t event )
178     {
179 capela 146 const char *pszEvent;
180 capela 144 char szQuery[LSCP_BUFSIZ];
181     int cchQuery;
182    
183     if (pClient == NULL)
184     return LSCP_FAILED;
185    
186     // Which (single) event?
187 capela 146 pszEvent = lscp_event_to_text(event);
188     if (pszEvent == NULL)
189 capela 144 return LSCP_FAILED;
190 capela 146
191 capela 144 // Build the query string...
192     cchQuery = sprintf(szQuery, "%sSUBSCRIBE %s\n\n", (iSubscribe == 0 ? "UN" : ""), pszEvent);
193     // Just send data, forget result...
194     if (send(pClient->evt.sock, szQuery, cchQuery, 0) < cchQuery) {
195     lscp_socket_perror("_lscp_client_evt_request: send");
196     return LSCP_FAILED;
197     }
198    
199 capela 177 // Wait on response.
200     lscp_cond_wait(pClient->cond, pClient->mutex);
201 capela 562
202 capela 144 // Update as naively as we can...
203     if (iSubscribe)
204     pClient->events |= event;
205     else
206     pClient->events &= ~event;
207    
208     return LSCP_OK;
209     }
210    
211    
212     //-------------------------------------------------------------------------
213 capela 107 // Client versioning teller fuunction.
214    
215    
216     /** Retrieve the current client library version string. */
217     const char* lscp_client_package (void) { return LSCP_PACKAGE; }
218    
219     /** Retrieve the current client library version string. */
220     const char* lscp_client_version (void) { return LSCP_VERSION; }
221    
222     /** Retrieve the current client library build timestamp string. */
223     const char* lscp_client_build (void) { return __DATE__ " " __TIME__; }
224    
225    
226     //-------------------------------------------------------------------------
227     // Client socket functions.
228    
229     /**
230     * Create a client instance, estabilishing a connection to a server hostname,
231     * which must be listening on the given port. A client callback function is
232     * also supplied for server notification event handling.
233     *
234     * @param pszHost Hostname of the linuxsampler listening server.
235     * @param iPort Port number of the linuxsampler listening server.
236     * @param pfnCallback Callback function to receive event notifications.
237     * @param pvData User context opaque data, that will be passed
238     * to the callback function.
239     *
240     * @returns The new client instance pointer if successfull, which shall be
241     * used on all subsequent client calls, NULL otherwise.
242     */
243     lscp_client_t* lscp_client_create ( const char *pszHost, int iPort, lscp_client_proc_t pfnCallback, void *pvData )
244     {
245     lscp_client_t *pClient;
246     struct hostent *pHost;
247     lscp_socket_t sock;
248     struct sockaddr_in addr;
249     int cAddr;
250 capela 144 #if defined(WIN32)
251 capela 107 int iSockOpt = (-1);
252 capela 144 #endif
253 capela 107
254     if (pfnCallback == NULL) {
255     fprintf(stderr, "lscp_client_create: Invalid client callback function.\n");
256     return NULL;
257     }
258    
259     pHost = gethostbyname(pszHost);
260     if (pHost == NULL) {
261 capela 114 lscp_socket_herror("lscp_client_create: gethostbyname");
262 capela 107 return NULL;
263     }
264    
265     // Allocate client descriptor...
266    
267     pClient = (lscp_client_t *) malloc(sizeof(lscp_client_t));
268     if (pClient == NULL) {
269     fprintf(stderr, "lscp_client_create: Out of memory.\n");
270     return NULL;
271     }
272     memset(pClient, 0, sizeof(lscp_client_t));
273    
274     pClient->pfnCallback = pfnCallback;
275     pClient->pvData = pvData;
276    
277     #ifdef DEBUG
278     fprintf(stderr, "lscp_client_create: pClient=%p: pszHost=%s iPort=%d.\n", pClient, pszHost, iPort);
279     #endif
280    
281 capela 132 // Prepare the command connection socket...
282 capela 107
283     sock = socket(AF_INET, SOCK_STREAM, 0);
284     if (sock == INVALID_SOCKET) {
285 capela 132 lscp_socket_perror("lscp_client_create: cmd: socket");
286 capela 107 free(pClient);
287     return NULL;
288     }
289    
290     #if defined(WIN32)
291     if (setsockopt(sock, SOL_SOCKET, SO_DONTLINGER, (char *) &iSockOpt, sizeof(int)) == SOCKET_ERROR)
292 capela 132 lscp_socket_perror("lscp_client_create: cmd: setsockopt(SO_DONTLINGER)");
293 capela 107 #endif
294    
295     #ifdef DEBUG
296 capela 132 lscp_socket_getopts("lscp_client_create: cmd", sock);
297 capela 107 #endif
298    
299     cAddr = sizeof(struct sockaddr_in);
300     memset((char *) &addr, 0, cAddr);
301     addr.sin_family = pHost->h_addrtype;
302     memmove((char *) &(addr.sin_addr), pHost->h_addr, pHost->h_length);
303     addr.sin_port = htons((short) iPort);
304    
305     if (connect(sock, (struct sockaddr *) &addr, cAddr) == SOCKET_ERROR) {
306 capela 132 lscp_socket_perror("lscp_client_create: cmd: connect");
307 capela 107 closesocket(sock);
308     free(pClient);
309     return NULL;
310     }
311    
312 capela 144 // Initialize the command socket agent struct...
313 capela 132 lscp_socket_agent_init(&(pClient->cmd), sock, &addr, cAddr);
314 capela 107
315     #ifdef DEBUG
316 capela 132 fprintf(stderr, "lscp_client_create: cmd: pClient=%p: sock=%d addr=%s port=%d.\n", pClient, pClient->cmd.sock, inet_ntoa(pClient->cmd.addr.sin_addr), ntohs(pClient->cmd.addr.sin_port));
317 capela 107 #endif
318    
319 capela 144 // Initialize the event service socket struct...
320     lscp_socket_agent_init(&(pClient->evt), INVALID_SOCKET, NULL, 0);
321     // No events subscribed, yet.
322     pClient->events = LSCP_EVENT_NONE;
323 capela 107 // Initialize cached members.
324     pClient->audio_drivers = NULL;
325     pClient->midi_drivers = NULL;
326 capela 125 pClient->audio_devices = NULL;
327     pClient->midi_devices = NULL;
328 capela 107 pClient->engines = NULL;
329 capela 125 pClient->channels = NULL;
330 capela 948 pClient->midi_instruments = NULL;
331 capela 171 lscp_driver_info_init(&(pClient->audio_driver_info));
332     lscp_driver_info_init(&(pClient->midi_driver_info));
333     lscp_device_info_init(&(pClient->audio_device_info));
334     lscp_device_info_init(&(pClient->midi_device_info));
335 capela 163 lscp_param_info_init(&(pClient->audio_param_info));
336     lscp_param_info_init(&(pClient->midi_param_info));
337 capela 171 lscp_device_port_info_init(&(pClient->audio_channel_info));
338     lscp_device_port_info_init(&(pClient->midi_port_info));
339     lscp_param_info_init(&(pClient->audio_channel_param_info));
340     lscp_param_info_init(&(pClient->midi_port_param_info));
341 capela 564 lscp_server_info_init(&(pClient->server_info));
342 capela 107 lscp_engine_info_init(&(pClient->engine_info));
343     lscp_channel_info_init(&(pClient->channel_info));
344 capela 946 lscp_midi_instrument_info_init(&(pClient->midi_instrument_info));
345 capela 107 // Initialize error stuff.
346     pClient->pszResult = NULL;
347     pClient->iErrno = -1;
348     // Stream usage stuff.
349     pClient->buffer_fill = NULL;
350     pClient->iStreamCount = 0;
351     // Default timeout value.
352     pClient->iTimeout = LSCP_TIMEOUT_MSECS;
353 capela 626 pClient->iTimeoutCount = 0;
354 capela 107
355     // Initialize the transaction mutex.
356     lscp_mutex_init(pClient->mutex);
357 capela 177 lscp_cond_init(pClient->cond);
358 capela 107
359     // Finally we've some success...
360     return pClient;
361     }
362    
363    
364     /**
365     * Wait for a client instance to terminate graciously.
366     *
367     * @param pClient Pointer to client instance structure.
368     */
369     lscp_status_t lscp_client_join ( lscp_client_t *pClient )
370     {
371     if (pClient == NULL)
372     return LSCP_FAILED;
373    
374     #ifdef DEBUG
375     fprintf(stderr, "lscp_client_join: pClient=%p.\n", pClient);
376     #endif
377    
378 capela 132 // lscp_socket_agent_join(&(pClient->evt));
379     lscp_socket_agent_join(&(pClient->cmd));
380 capela 107
381     return LSCP_OK;
382     }
383    
384    
385     /**
386     * Terminate and destroy a client instance.
387     *
388     * @param pClient Pointer to client instance structure.
389     *
390     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
391     */
392     lscp_status_t lscp_client_destroy ( lscp_client_t *pClient )
393     {
394     if (pClient == NULL)
395     return LSCP_FAILED;
396    
397     #ifdef DEBUG
398     fprintf(stderr, "lscp_client_destroy: pClient=%p.\n", pClient);
399     #endif
400    
401 capela 132 // Lock this section up.
402     lscp_mutex_lock(pClient->mutex);
403 capela 562
404 capela 107 // Free up all cached members.
405 capela 946 lscp_midi_instrument_info_free(&(pClient->midi_instrument_info));
406 capela 179 lscp_channel_info_free(&(pClient->channel_info));
407     lscp_engine_info_free(&(pClient->engine_info));
408 capela 564 lscp_server_info_free(&(pClient->server_info));
409 capela 179 lscp_param_info_free(&(pClient->midi_port_param_info));
410     lscp_param_info_free(&(pClient->audio_channel_param_info));
411     lscp_device_port_info_free(&(pClient->midi_port_info));
412     lscp_device_port_info_free(&(pClient->audio_channel_info));
413     lscp_param_info_free(&(pClient->midi_param_info));
414     lscp_param_info_free(&(pClient->audio_param_info));
415     lscp_device_info_free(&(pClient->midi_device_info));
416     lscp_device_info_free(&(pClient->audio_device_info));
417     lscp_driver_info_free(&(pClient->midi_driver_info));
418     lscp_driver_info_free(&(pClient->audio_driver_info));
419 capela 107 // Free available engine table.
420     lscp_szsplit_destroy(pClient->audio_drivers);
421     lscp_szsplit_destroy(pClient->midi_drivers);
422 capela 125 lscp_isplit_destroy(pClient->audio_devices);
423     lscp_isplit_destroy(pClient->midi_devices);
424 capela 107 lscp_szsplit_destroy(pClient->engines);
425 capela 125 lscp_isplit_destroy(pClient->channels);
426 capela 948 lscp_midi_instruments_destroy(pClient->midi_instruments);
427 capela 107 // Make them null.
428     pClient->audio_drivers = NULL;
429     pClient->midi_drivers = NULL;
430 capela 948 pClient->audio_devices = NULL;
431     pClient->midi_devices = NULL;
432 capela 107 pClient->engines = NULL;
433 capela 948 pClient->channels = NULL;
434     pClient->midi_instruments = NULL;
435 capela 107 // Free result error stuff.
436 capela 132 lscp_client_set_result(pClient, NULL, 0);
437 capela 167 // Free stream usage stuff.
438 capela 107 if (pClient->buffer_fill)
439     free(pClient->buffer_fill);
440     pClient->buffer_fill = NULL;
441     pClient->iStreamCount = 0;
442     pClient->iTimeout = 0;
443    
444     // Free socket agents.
445 capela 132 lscp_socket_agent_free(&(pClient->evt));
446     lscp_socket_agent_free(&(pClient->cmd));
447 capela 107
448     // Last but not least, free good ol'transaction mutex.
449 capela 132 lscp_mutex_unlock(pClient->mutex);
450 capela 107 lscp_mutex_destroy(pClient->mutex);
451 capela 177 lscp_cond_destroy(pClient->cond);
452 capela 107
453     free(pClient);
454    
455     return LSCP_OK;
456     }
457    
458    
459     /**
460     * Set the client transaction timeout interval.
461     *
462     * @param pClient Pointer to client instance structure.
463     * @param iTimeout Transaction timeout in milliseconds.
464     *
465     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
466     */
467     lscp_status_t lscp_client_set_timeout ( lscp_client_t *pClient, int iTimeout )
468     {
469     if (pClient == NULL)
470     return LSCP_FAILED;
471     if (iTimeout < 0)
472     return LSCP_FAILED;
473    
474     pClient->iTimeout = iTimeout;
475     return LSCP_OK;
476     }
477    
478    
479     /**
480     * Get the client transaction timeout interval.
481     *
482     * @param pClient Pointer to client instance structure.
483     *
484     * @returns The current timeout value milliseconds, -1 in case of failure.
485     */
486     int lscp_client_get_timeout ( lscp_client_t *pClient )
487     {
488     if (pClient == NULL)
489     return -1;
490    
491     return pClient->iTimeout;
492     }
493    
494    
495     //-------------------------------------------------------------------------
496     // Client common protocol functions.
497    
498     /**
499     * Submit a command query line string to the server. The query string
500     * must be cr/lf and null terminated. Besides the return code, the
501     * specific server response to the command request is made available
502     * by the @ref lscp_client_get_result and @ref lscp_client_get_errno
503     * function calls.
504     *
505     * @param pClient Pointer to client instance structure.
506     * @param pszQuery Command request line to be sent to server,
507     * must be cr/lf and null terminated.
508     *
509     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
510     */
511     lscp_status_t lscp_client_query ( lscp_client_t *pClient, const char *pszQuery )
512     {
513 capela 132 lscp_status_t ret;
514 capela 562
515 capela 107 // Lock this section up.
516     lscp_mutex_lock(pClient->mutex);
517    
518 capela 132 // Just make the now guarded call.
519 capela 948 ret = lscp_client_call(pClient, pszQuery, 0);
520 capela 562
521 capela 132 // Unlock this section down.
522 capela 107 lscp_mutex_unlock(pClient->mutex);
523 capela 562
524 capela 107 return ret;
525     }
526    
527     /**
528     * Get the last received result string. In case of error or warning,
529     * this is the text of the error or warning message issued.
530     *
531     * @param pClient Pointer to client instance structure.
532     *
533     * @returns A pointer to the literal null-terminated result string as
534     * of the last command request.
535     */
536     const char *lscp_client_get_result ( lscp_client_t *pClient )
537     {
538     if (pClient == NULL)
539     return NULL;
540    
541     return pClient->pszResult;
542     }
543    
544    
545     /**
546     * Get the last error/warning number received.
547     *
548     * @param pClient Pointer to client instance structure.
549     *
550     * @returns The numerical value of the last error or warning
551     * response code received.
552     */
553     int lscp_client_get_errno ( lscp_client_t *pClient )
554     {
555     if (pClient == NULL)
556     return -1;
557    
558     return pClient->iErrno;
559     }
560    
561    
562     //-------------------------------------------------------------------------
563     // Client registration protocol functions.
564    
565     /**
566 capela 144 * Register frontend for receiving event messages:
567 capela 562 * SUBSCRIBE CHANNEL_COUNT | VOICE_COUNT | STREAM_COUNT | BUFFER_FILL
568 capela 144 * | CHANNEL_INFO | MISCELLANEOUS
569 capela 107 *
570     * @param pClient Pointer to client instance structure.
571 capela 144 * @param events Bit-wise OR'ed event flags to subscribe.
572 capela 107 *
573     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
574     */
575 capela 144 lscp_status_t lscp_client_subscribe ( lscp_client_t *pClient, lscp_event_t events )
576 capela 107 {
577 capela 144 lscp_status_t ret = LSCP_FAILED;
578 capela 107
579 capela 144 if (pClient == NULL)
580 capela 107 return LSCP_FAILED;
581    
582 capela 132 // Lock this section up.
583     lscp_mutex_lock(pClient->mutex);
584 capela 144
585     // If applicable, start the alternate connection...
586     if (pClient->events == LSCP_EVENT_NONE)
587     ret = _lscp_client_evt_connect(pClient);
588 capela 562
589 capela 144 // Send the subscription commands.
590 capela 562 if (ret == LSCP_OK && (events & LSCP_EVENT_CHANNEL_COUNT))
591     ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_CHANNEL_COUNT);
592 capela 144 if (ret == LSCP_OK && (events & LSCP_EVENT_VOICE_COUNT))
593     ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_VOICE_COUNT);
594     if (ret == LSCP_OK && (events & LSCP_EVENT_STREAM_COUNT))
595     ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_STREAM_COUNT);
596     if (ret == LSCP_OK && (events & LSCP_EVENT_BUFFER_FILL))
597     ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_BUFFER_FILL);
598     if (ret == LSCP_OK && (events & LSCP_EVENT_CHANNEL_INFO))
599     ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_CHANNEL_INFO);
600     if (ret == LSCP_OK && (events & LSCP_EVENT_MISCELLANEOUS))
601     ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_MISCELLANEOUS);
602 capela 107
603 capela 132 // Unlock this section down.
604     lscp_mutex_unlock(pClient->mutex);
605    
606 capela 107 return ret;
607     }
608    
609    
610     /**
611 capela 144 * Deregister frontend from receiving UDP event messages anymore:
612 capela 562 * SUBSCRIBE CHANNEL_COUNT | VOICE_COUNT | STREAM_COUNT | BUFFER_FILL
613 capela 144 * | CHANNEL_INFO | MISCELLANEOUS
614 capela 107 *
615     * @param pClient Pointer to client instance structure.
616 capela 144 * @param events Bit-wise OR'ed event flags to unsubscribe.
617 capela 107 *
618     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
619     */
620 capela 144 lscp_status_t lscp_client_unsubscribe ( lscp_client_t *pClient, lscp_event_t events )
621 capela 107 {
622 capela 144 lscp_status_t ret = LSCP_OK;
623 capela 107
624     if (pClient == NULL)
625     return LSCP_FAILED;
626    
627 capela 132 // Lock this section up.
628     lscp_mutex_lock(pClient->mutex);
629    
630 capela 144 // Send the unsubscription commands.
631 capela 562 if (ret == LSCP_OK && (events & LSCP_EVENT_CHANNEL_COUNT))
632     ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_CHANNEL_COUNT);
633 capela 144 if (ret == LSCP_OK && (events & LSCP_EVENT_VOICE_COUNT))
634     ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_VOICE_COUNT);
635     if (ret == LSCP_OK && (events & LSCP_EVENT_STREAM_COUNT))
636     ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_STREAM_COUNT);
637     if (ret == LSCP_OK && (events & LSCP_EVENT_BUFFER_FILL))
638     ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_BUFFER_FILL);
639     if (ret == LSCP_OK && (events & LSCP_EVENT_CHANNEL_INFO))
640     ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_CHANNEL_INFO);
641     if (ret == LSCP_OK && (events & LSCP_EVENT_MISCELLANEOUS))
642     ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_MISCELLANEOUS);
643 capela 107
644 capela 144 // If necessary, close the alternate connection...
645     if (pClient->events == LSCP_EVENT_NONE)
646     lscp_socket_agent_free(&(pClient->evt));
647    
648 capela 132 // Unlock this section down.
649     lscp_mutex_unlock(pClient->mutex);
650    
651 capela 107 return ret;
652     }
653    
654    
655 capela 213 /**
656     * Getting current subscribed events.
657     *
658     * @param pClient Pointer to client instance structure.
659     *
660     * @returns The current subscrived bit-wise OR'ed event flags.
661     */
662     lscp_event_t lscp_client_get_events ( lscp_client_t *pClient )
663     {
664     if (pClient == NULL)
665     return LSCP_EVENT_NONE;
666    
667     return pClient->events;
668     }
669    
670    
671 capela 107 //-------------------------------------------------------------------------
672     // Client command protocol functions.
673    
674     /**
675     * Loading an instrument:
676     * LOAD INSTRUMENT <filename> <instr-index> <sampler-channel>
677     *
678     * @param pClient Pointer to client instance structure.
679     * @param pszFileName Instrument file name.
680     * @param iInstrIndex Instrument index number.
681     * @param iSamplerChannel Sampler Channel.
682     *
683     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
684     */
685     lscp_status_t lscp_load_instrument ( lscp_client_t *pClient, const char *pszFileName, int iInstrIndex, int iSamplerChannel )
686     {
687     char szQuery[LSCP_BUFSIZ];
688    
689     if (pszFileName == NULL || iSamplerChannel < 0)
690     return LSCP_FAILED;
691    
692 capela 144 sprintf(szQuery, "LOAD INSTRUMENT '%s' %d %d\r\n", pszFileName, iInstrIndex, iSamplerChannel);
693 capela 107 return lscp_client_query(pClient, szQuery);
694     }
695    
696    
697     /**
698 capela 144 * Loading an instrument in the background (non modal):
699     * LOAD INSTRUMENT NON_MODAL <filename> <instr-index> <sampler-channel>
700     *
701     * @param pClient Pointer to client instance structure.
702     * @param pszFileName Instrument file name.
703     * @param iInstrIndex Instrument index number.
704     * @param iSamplerChannel Sampler Channel.
705     *
706     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
707     */
708     lscp_status_t lscp_load_instrument_non_modal ( lscp_client_t *pClient, const char *pszFileName, int iInstrIndex, int iSamplerChannel )
709     {
710     char szQuery[LSCP_BUFSIZ];
711    
712     if (pszFileName == NULL || iSamplerChannel < 0)
713     return LSCP_FAILED;
714    
715     sprintf(szQuery, "LOAD INSTRUMENT NON_MODAL '%s' %d %d\r\n", pszFileName, iInstrIndex, iSamplerChannel);
716     return lscp_client_query(pClient, szQuery);
717     }
718    
719    
720     /**
721 capela 107 * Loading a sampler engine:
722     * LOAD ENGINE <engine-name> <sampler-channel>
723     *
724     * @param pClient Pointer to client instance structure.
725     * @param pszEngineName Engine name.
726     * @param iSamplerChannel Sampler channel number.
727     *
728     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
729     */
730     lscp_status_t lscp_load_engine ( lscp_client_t *pClient, const char *pszEngineName, int iSamplerChannel )
731     {
732     char szQuery[LSCP_BUFSIZ];
733    
734     if (pszEngineName == NULL || iSamplerChannel < 0)
735     return LSCP_FAILED;
736    
737     sprintf(szQuery, "LOAD ENGINE %s %d\r\n", pszEngineName, iSamplerChannel);
738     return lscp_client_query(pClient, szQuery);
739     }
740    
741    
742     /**
743     * Current number of sampler channels:
744     * GET CHANNELS
745     *
746     * @param pClient Pointer to client instance structure.
747     *
748     * @returns The current total number of sampler channels on success,
749     * -1 otherwise.
750     */
751     int lscp_get_channels ( lscp_client_t *pClient )
752     {
753     int iChannels = -1;
754 capela 132
755     // Lock this section up.
756     lscp_mutex_lock(pClient->mutex);
757    
758 capela 948 if (lscp_client_call(pClient, "GET CHANNELS\r\n", 0) == LSCP_OK)
759 capela 107 iChannels = atoi(lscp_client_get_result(pClient));
760 capela 132
761     // Unlock this section doen.
762     lscp_mutex_unlock(pClient->mutex);
763    
764 capela 107 return iChannels;
765     }
766    
767    
768     /**
769 capela 125 * List current sampler channels number identifiers:
770     * LIST CHANNELS
771     *
772     * @param pClient Pointer to client instance structure.
773     *
774     * @returns An array of the sampler channels identifiers as positive integers,
775     * terminated with -1 on success, NULL otherwise.
776     */
777     int *lscp_list_channels ( lscp_client_t *pClient )
778     {
779     const char *pszSeps = ",";
780    
781     if (pClient == NULL)
782     return NULL;
783 capela 562
784 capela 132 // Lock this section up.
785     lscp_mutex_lock(pClient->mutex);
786    
787 capela 125 if (pClient->channels) {
788     lscp_isplit_destroy(pClient->channels);
789     pClient->channels = NULL;
790     }
791    
792 capela 948 if (lscp_client_call(pClient, "LIST CHANNELS\r\n", 0) == LSCP_OK)
793 capela 125 pClient->channels = lscp_isplit_create(lscp_client_get_result(pClient), pszSeps);
794    
795 capela 132 // Unlock this section down.
796     lscp_mutex_unlock(pClient->mutex);
797    
798 capela 125 return pClient->channels;
799     }
800    
801    
802     /**
803 capela 107 * Adding a new sampler channel:
804     * ADD CHANNEL
805     *
806     * @param pClient Pointer to client instance structure.
807     *
808     * @returns The new sampler channel number identifier,
809     * or -1 in case of failure.
810     */
811     int lscp_add_channel ( lscp_client_t *pClient )
812     {
813     int iSamplerChannel = -1;
814 capela 132
815     // Lock this section up.
816     lscp_mutex_lock(pClient->mutex);
817    
818 capela 948 if (lscp_client_call(pClient, "ADD CHANNEL\r\n", 0) == LSCP_OK)
819 capela 107 iSamplerChannel = atoi(lscp_client_get_result(pClient));
820 capela 562
821 capela 132 // Unlock this section down.
822     lscp_mutex_unlock(pClient->mutex);
823    
824 capela 107 return iSamplerChannel;
825     }
826    
827    
828     /**
829     * Removing a sampler channel:
830     * REMOVE CHANNEL <sampler-channel>
831     *
832     * @param pClient Pointer to client instance structure.
833     * @param iSamplerChannel Sampler channel number.
834     *
835     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
836     */
837     lscp_status_t lscp_remove_channel ( lscp_client_t *pClient, int iSamplerChannel )
838     {
839     char szQuery[LSCP_BUFSIZ];
840    
841     if (iSamplerChannel < 0)
842     return LSCP_FAILED;
843    
844     sprintf(szQuery, "REMOVE CHANNEL %d\r\n", iSamplerChannel);
845     return lscp_client_query(pClient, szQuery);
846     }
847    
848    
849     /**
850 capela 523 * Getting all available engines count:
851 capela 107 * GET AVAILABLE_ENGINES
852     *
853     * @param pClient Pointer to client instance structure.
854     *
855 capela 523 * @returns The current total number of sampler engines on success,
856     * -1 otherwise.
857     */
858     int lscp_get_available_engines ( lscp_client_t *pClient )
859     {
860 capela 562 int iAvailableEngines = -1;
861 capela 523
862     // Lock this section up.
863     lscp_mutex_lock(pClient->mutex);
864    
865 capela 948 if (lscp_client_call(pClient, "GET AVAILABLE_ENGINES\r\n", 0) == LSCP_OK)
866 capela 523 iAvailableEngines = atoi(lscp_client_get_result(pClient));
867    
868     // Unlock this section down.
869     lscp_mutex_unlock(pClient->mutex);
870    
871     return iAvailableEngines;
872     }
873    
874    
875     /**
876     * Getting all available engines:
877     * LIST AVAILABLE_ENGINES
878     *
879     * @param pClient Pointer to client instance structure.
880     *
881 capela 107 * @returns A NULL terminated array of engine name strings,
882     * or NULL in case of failure.
883     */
884 capela 523 const char **lscp_list_available_engines ( lscp_client_t *pClient )
885 capela 107 {
886     const char *pszSeps = ",";
887    
888 capela 132 // Lock this section up.
889     lscp_mutex_lock(pClient->mutex);
890    
891 capela 107 if (pClient->engines) {
892     lscp_szsplit_destroy(pClient->engines);
893     pClient->engines = NULL;
894     }
895    
896 capela 948 if (lscp_client_call(pClient, "LIST AVAILABLE_ENGINES\r\n", 0) == LSCP_OK)
897 capela 107 pClient->engines = lscp_szsplit_create(lscp_client_get_result(pClient), pszSeps);
898    
899 capela 132 // Unlock this section down.
900     lscp_mutex_unlock(pClient->mutex);
901    
902 capela 107 return (const char **) pClient->engines;
903     }
904    
905    
906     /**
907     * Getting information about an engine.
908     * GET ENGINE INFO <engine-name>
909     *
910     * @param pClient Pointer to client instance structure.
911     * @param pszEngineName Engine name.
912     *
913     * @returns A pointer to a @ref lscp_engine_info_t structure, with all the
914     * information of the given sampler engine, or NULL in case of failure.
915     */
916     lscp_engine_info_t *lscp_get_engine_info ( lscp_client_t *pClient, const char *pszEngineName )
917     {
918     lscp_engine_info_t *pEngineInfo;
919     char szQuery[LSCP_BUFSIZ];
920     const char *pszResult;
921     const char *pszSeps = ":";
922     const char *pszCrlf = "\r\n";
923     char *pszToken;
924     char *pch;
925    
926     if (pszEngineName == NULL)
927     return NULL;
928    
929 capela 132 // Lock this section up.
930     lscp_mutex_lock(pClient->mutex);
931    
932 capela 107 pEngineInfo = &(pClient->engine_info);
933     lscp_engine_info_reset(pEngineInfo);
934    
935     sprintf(szQuery, "GET ENGINE INFO %s\r\n", pszEngineName);
936 capela 948 if (lscp_client_call(pClient, szQuery, 1) == LSCP_OK) {
937 capela 132 pszResult = lscp_client_get_result(pClient);
938     pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch));
939     while (pszToken) {
940     if (strcasecmp(pszToken, "DESCRIPTION") == 0) {
941     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
942     if (pszToken)
943 capela 180 lscp_unquote_dup(&(pEngineInfo->description), &pszToken);
944 capela 132 }
945     else if (strcasecmp(pszToken, "VERSION") == 0) {
946     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
947     if (pszToken)
948 capela 180 lscp_unquote_dup(&(pEngineInfo->version), &pszToken);
949 capela 132 }
950     pszToken = lscp_strtok(NULL, pszSeps, &(pch));
951 capela 107 }
952     }
953 capela 132 else pEngineInfo = NULL;
954 capela 562
955 capela 132 // Unlock this section down.
956     lscp_mutex_unlock(pClient->mutex);
957 capela 107
958     return pEngineInfo;
959     }
960    
961    
962     /**
963     * Getting sampler channel informations:
964     * GET CHANNEL INFO <sampler-channel>
965     *
966     * @param pClient Pointer to client instance structure.
967     * @param iSamplerChannel Sampler channel number.
968     *
969     * @returns A pointer to a @ref lscp_channel_info_t structure, with all the
970     * information of the given sampler channel, or NULL in case of failure.
971     */
972     lscp_channel_info_t *lscp_get_channel_info ( lscp_client_t *pClient, int iSamplerChannel )
973     {
974     lscp_channel_info_t *pChannelInfo;
975     char szQuery[LSCP_BUFSIZ];
976     const char *pszResult;
977     const char *pszSeps = ":";
978     const char *pszCrlf = "\r\n";
979     char *pszToken;
980     char *pch;
981    
982     if (iSamplerChannel < 0)
983     return NULL;
984    
985 capela 132 // Lock this section up.
986     lscp_mutex_lock(pClient->mutex);
987 capela 562
988 capela 107 pChannelInfo = &(pClient->channel_info);
989     lscp_channel_info_reset(pChannelInfo);
990    
991     sprintf(szQuery, "GET CHANNEL INFO %d\r\n", iSamplerChannel);
992 capela 948 if (lscp_client_call(pClient, szQuery, 1) == LSCP_OK) {
993 capela 132 pszResult = lscp_client_get_result(pClient);
994     pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch));
995     while (pszToken) {
996     if (strcasecmp(pszToken, "ENGINE_NAME") == 0) {
997     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
998     if (pszToken)
999 capela 180 lscp_unquote_dup(&(pChannelInfo->engine_name), &pszToken);
1000 capela 132 }
1001     else if (strcasecmp(pszToken, "AUDIO_OUTPUT_DEVICE") == 0) {
1002     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1003     if (pszToken)
1004     pChannelInfo->audio_device = atoi(lscp_ltrim(pszToken));
1005     }
1006     else if (strcasecmp(pszToken, "AUDIO_OUTPUT_CHANNELS") == 0) {
1007     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1008     if (pszToken)
1009     pChannelInfo->audio_channels = atoi(lscp_ltrim(pszToken));
1010     }
1011     else if (strcasecmp(pszToken, "AUDIO_OUTPUT_ROUTING") == 0) {
1012     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1013 capela 180 if (pszToken) {
1014     if (pChannelInfo->audio_routing)
1015     lscp_szsplit_destroy(pChannelInfo->audio_routing);
1016 capela 132 pChannelInfo->audio_routing = lscp_szsplit_create(pszToken, ",");
1017 capela 180 }
1018 capela 132 }
1019     else if (strcasecmp(pszToken, "INSTRUMENT_FILE") == 0) {
1020     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1021     if (pszToken)
1022 capela 180 lscp_unquote_dup(&(pChannelInfo->instrument_file), &pszToken);
1023 capela 132 }
1024     else if (strcasecmp(pszToken, "INSTRUMENT_NR") == 0) {
1025     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1026     if (pszToken)
1027     pChannelInfo->instrument_nr = atoi(lscp_ltrim(pszToken));
1028     }
1029 capela 378 else if (strcasecmp(pszToken, "INSTRUMENT_NAME") == 0) {
1030     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1031     if (pszToken)
1032     lscp_unquote_dup(&(pChannelInfo->instrument_name), &pszToken);
1033     }
1034 capela 132 else if (strcasecmp(pszToken, "INSTRUMENT_STATUS") == 0) {
1035     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1036     if (pszToken)
1037     pChannelInfo->instrument_status = atoi(lscp_ltrim(pszToken));
1038     }
1039     else if (strcasecmp(pszToken, "MIDI_INPUT_DEVICE") == 0) {
1040     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1041     if (pszToken)
1042     pChannelInfo->midi_device = atoi(lscp_ltrim(pszToken));
1043     }
1044     else if (strcasecmp(pszToken, "MIDI_INPUT_PORT") == 0) {
1045     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1046     if (pszToken)
1047     pChannelInfo->midi_port = atoi(lscp_ltrim(pszToken));
1048     }
1049     else if (strcasecmp(pszToken, "MIDI_INPUT_CHANNEL") == 0) {
1050     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1051 capela 279 if (pszToken) {
1052     pszToken = lscp_ltrim(pszToken);
1053     if (strcasecmp(pszToken, "ALL") == 0)
1054     pChannelInfo->midi_channel = LSCP_MIDI_CHANNEL_ALL;
1055     else
1056     pChannelInfo->midi_channel = atoi(pszToken);
1057     }
1058 capela 132 }
1059     else if (strcasecmp(pszToken, "VOLUME") == 0) {
1060     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1061     if (pszToken)
1062     pChannelInfo->volume = (float) atof(lscp_ltrim(pszToken));
1063     }
1064 capela 735 else if (strcasecmp(pszToken, "MUTE") == 0) {
1065     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1066     if (pszToken)
1067     pChannelInfo->mute = (strcasecmp(lscp_unquote(&pszToken, 0), "TRUE") == 0);
1068     }
1069     else if (strcasecmp(pszToken, "SOLO") == 0) {
1070     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1071     if (pszToken)
1072     pChannelInfo->solo = (strcasecmp(lscp_unquote(&pszToken, 0), "TRUE") == 0);
1073     }
1074 capela 132 pszToken = lscp_strtok(NULL, pszSeps, &(pch));
1075 capela 107 }
1076     }
1077 capela 132 else pChannelInfo = NULL;
1078 capela 562
1079 capela 132 // Unlock this section up.
1080     lscp_mutex_unlock(pClient->mutex);
1081 capela 107
1082     return pChannelInfo;
1083     }
1084    
1085    
1086     /**
1087     * Current number of active voices:
1088     * GET CHANNEL VOICE_COUNT <sampler-channel>
1089     *
1090     * @param pClient Pointer to client instance structure.
1091     * @param iSamplerChannel Sampler channel number.
1092     *
1093     * @returns The number of voices currently active, -1 in case of failure.
1094     */
1095     int lscp_get_channel_voice_count ( lscp_client_t *pClient, int iSamplerChannel )
1096     {
1097     char szQuery[LSCP_BUFSIZ];
1098     int iVoiceCount = -1;
1099    
1100     if (iSamplerChannel < 0)
1101     return iVoiceCount;
1102    
1103 capela 132 // Lock this section up.
1104     lscp_mutex_lock(pClient->mutex);
1105    
1106 capela 107 sprintf(szQuery, "GET CHANNEL VOICE_COUNT %d\r\n", iSamplerChannel);
1107 capela 948 if (lscp_client_call(pClient, szQuery, 0) == LSCP_OK)
1108 capela 107 iVoiceCount = atoi(lscp_client_get_result(pClient));
1109    
1110 capela 132 // Unlock this section down.
1111     lscp_mutex_unlock(pClient->mutex);
1112    
1113 capela 107 return iVoiceCount;
1114     }
1115    
1116    
1117     /**
1118     * Current number of active disk streams:
1119     * GET CHANNEL STREAM_COUNT <sampler-channel>
1120     *
1121 capela 167 * @param pClient Pointer to client instance structure.
1122     * @param iSamplerChannel Sampler channel number.
1123     *
1124 capela 107 * @returns The number of active disk streams on success, -1 otherwise.
1125     */
1126     int lscp_get_channel_stream_count ( lscp_client_t *pClient, int iSamplerChannel )
1127     {
1128     char szQuery[LSCP_BUFSIZ];
1129     int iStreamCount = -1;
1130    
1131     if (iSamplerChannel < 0)
1132     return iStreamCount;
1133    
1134 capela 132 // Lock this section up.
1135     lscp_mutex_lock(pClient->mutex);
1136    
1137 capela 107 sprintf(szQuery, "GET CHANNEL STREAM_COUNT %d\r\n", iSamplerChannel);
1138 capela 948 if (lscp_client_call(pClient, szQuery, 0) == LSCP_OK)
1139 capela 107 iStreamCount = atoi(lscp_client_get_result(pClient));
1140    
1141 capela 132 // Unlock this section down.
1142     lscp_mutex_unlock(pClient->mutex);
1143    
1144 capela 107 return iStreamCount;
1145     }
1146    
1147    
1148     /**
1149 capela 167 * Current least usage of active disk streams.
1150     *
1151     * @param pClient Pointer to client instance structure.
1152     * @param iSamplerChannel Sampler channel number.
1153     *
1154     * @returns The usage percentage of the least filled active disk stream
1155     * on success, -1 otherwise.
1156     */
1157     int lscp_get_channel_stream_usage ( lscp_client_t *pClient, int iSamplerChannel )
1158     {
1159     char szQuery[LSCP_BUFSIZ];
1160     int iStreamUsage = -1;
1161     const char *pszResult;
1162     const char *pszSeps = "[]%,";
1163     char *pszToken;
1164     char *pch;
1165     int iStream;
1166     int iPercent;
1167    
1168     if (iSamplerChannel < 0)
1169     return iStreamUsage;
1170    
1171     // Lock this section up.
1172     lscp_mutex_lock(pClient->mutex);
1173    
1174     iStream = 0;
1175     sprintf(szQuery, "GET CHANNEL BUFFER_FILL PERCENTAGE %d\r\n", iSamplerChannel);
1176 capela 948 if (lscp_client_call(pClient, szQuery, 0) == LSCP_OK) {
1177 capela 167 pszResult = lscp_client_get_result(pClient);
1178     pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch));
1179     while (pszToken) {
1180     if (*pszToken) {
1181     // Skip stream id.
1182     pszToken = lscp_strtok(NULL, pszSeps, &(pch));
1183     if (pszToken == NULL)
1184     break;
1185     // Get least buffer fill percentage.
1186     iPercent = atol(pszToken);
1187     if (iStreamUsage > iPercent || iStream == 0)
1188     iStreamUsage = iPercent;
1189     iStream++;
1190     }
1191     pszToken = lscp_strtok(NULL, pszSeps, &(pch));
1192     }
1193     }
1194    
1195     // Unlock this section down.
1196     lscp_mutex_unlock(pClient->mutex);
1197    
1198     return iStreamUsage;
1199     }
1200    
1201    
1202     /**
1203 capela 107 * Current fill state of disk stream buffers:
1204     * GET CHANNEL BUFFER_FILL {BYTES|PERCENTAGE} <sampler-channel>
1205     *
1206     * @param pClient Pointer to client instance structure.
1207     * @param usage_type Usage type to be returned, either
1208     * @ref LSCP_USAGE_BYTES, or
1209     * @ref LSCP_USAGE_PERCENTAGE.
1210     * @param iSamplerChannel Sampler channel number.
1211     *
1212     * @returns A pointer to a @ref lscp_buffer_fill_t structure, with the
1213     * information of the current disk stream buffer fill usage, for the given
1214     * sampler channel, or NULL in case of failure.
1215     */
1216     lscp_buffer_fill_t *lscp_get_channel_buffer_fill ( lscp_client_t *pClient, lscp_usage_t usage_type, int iSamplerChannel )
1217     {
1218     lscp_buffer_fill_t *pBufferFill;
1219     char szQuery[LSCP_BUFSIZ];
1220     int iStreamCount;
1221     const char *pszUsageType = (usage_type == LSCP_USAGE_BYTES ? "BYTES" : "PERCENTAGE");
1222     const char *pszResult;
1223     const char *pszSeps = "[]%,";
1224     char *pszToken;
1225     char *pch;
1226     int iStream;
1227    
1228 capela 132 // Retrieve a channel stream estimation.
1229 capela 107 iStreamCount = lscp_get_channel_stream_count(pClient, iSamplerChannel);
1230 capela 132 if (pClient->iStreamCount < 0)
1231     return NULL;
1232    
1233     // Lock this section up.
1234     lscp_mutex_lock(pClient->mutex);
1235    
1236     // Check if we need to reallocate the stream usage array.
1237 capela 107 if (pClient->iStreamCount != iStreamCount) {
1238     if (pClient->buffer_fill)
1239     free(pClient->buffer_fill);
1240     if (iStreamCount > 0)
1241     pClient->buffer_fill = (lscp_buffer_fill_t *) malloc(iStreamCount * sizeof(lscp_buffer_fill_t));
1242     else
1243     pClient->buffer_fill = NULL;
1244     pClient->iStreamCount = iStreamCount;
1245     }
1246    
1247 capela 132 // Get buffer fill usage...
1248 capela 107 pBufferFill = pClient->buffer_fill;
1249 capela 132 if (pBufferFill && iStreamCount > 0) {
1250     iStream = 0;
1251     pBufferFill = pClient->buffer_fill;
1252     sprintf(szQuery, "GET CHANNEL BUFFER_FILL %s %d\r\n", pszUsageType, iSamplerChannel);
1253 capela 948 if (lscp_client_call(pClient, szQuery, 0) == LSCP_OK) {
1254 capela 132 pszResult = lscp_client_get_result(pClient);
1255     pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch));
1256     while (pszToken && iStream < pClient->iStreamCount) {
1257     if (*pszToken) {
1258     pBufferFill[iStream].stream_id = atol(pszToken);
1259     pszToken = lscp_strtok(NULL, pszSeps, &(pch));
1260     if (pszToken == NULL)
1261     break;
1262     pBufferFill[iStream].stream_usage = atol(pszToken);
1263     iStream++;
1264     }
1265 capela 107 pszToken = lscp_strtok(NULL, pszSeps, &(pch));
1266     }
1267 capela 132 } // Reset the usage, whatever it was before.
1268     else while (iStream < pClient->iStreamCount)
1269     pBufferFill[iStream++].stream_usage = 0;
1270     }
1271 capela 562
1272 capela 132 // Unlock this section down.
1273     lscp_mutex_unlock(pClient->mutex);
1274 capela 107
1275     return pBufferFill;
1276     }
1277    
1278    
1279     /**
1280     * Setting audio output type:
1281     * SET CHANNEL AUDIO_OUTPUT_TYPE <sampler-channel> <audio-output-type>
1282     *
1283     * @param pClient Pointer to client instance structure.
1284     * @param iSamplerChannel Sampler channel number.
1285     * @param pszAudioDriver Audio output driver type (e.g. "ALSA" or "JACK").
1286 capela 946 *
1287     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1288 capela 107 */
1289     lscp_status_t lscp_set_channel_audio_type ( lscp_client_t *pClient, int iSamplerChannel, const char *pszAudioDriver )
1290     {
1291     char szQuery[LSCP_BUFSIZ];
1292    
1293     if (iSamplerChannel < 0 || pszAudioDriver == NULL)
1294     return LSCP_FAILED;
1295    
1296     sprintf(szQuery, "SET CHANNEL AUDIO_OUTPUT_TYPE %d %s\r\n", iSamplerChannel, pszAudioDriver);
1297     return lscp_client_query(pClient, szQuery);
1298     }
1299    
1300    
1301     /**
1302 capela 144 * Setting audio output device:
1303     * SET CHANNEL AUDIO_OUTPUT_DEVICE <sampler-channel> <device-id>
1304     *
1305     * @param pClient Pointer to client instance structure.
1306     * @param iSamplerChannel Sampler channel number.
1307     * @param iAudioDevice Audio output device number identifier.
1308 capela 946 *
1309     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1310 capela 144 */
1311     lscp_status_t lscp_set_channel_audio_device ( lscp_client_t *pClient, int iSamplerChannel, int iAudioDevice )
1312     {
1313     char szQuery[LSCP_BUFSIZ];
1314    
1315     if (iSamplerChannel < 0 || iAudioDevice < 0)
1316     return LSCP_FAILED;
1317    
1318     sprintf(szQuery, "SET CHANNEL AUDIO_OUTPUT_DEVICE %d %d\r\n", iSamplerChannel, iAudioDevice);
1319     return lscp_client_query(pClient, szQuery);
1320     }
1321    
1322    
1323     /**
1324 capela 107 * Setting audio output channel:
1325     * SET CHANNEL AUDIO_OUTPUT_CHANNEL <sampler-channel> <audio-output-chan> <audio-input-chan>
1326     *
1327     * @param pClient Pointer to client instance structure.
1328     * @param iSamplerChannel Sampler channel number.
1329     * @param iAudioOut Audio output device channel to be routed from.
1330     * @param iAudioIn Audio output device channel to be routed into.
1331     *
1332     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1333     */
1334     lscp_status_t lscp_set_channel_audio_channel ( lscp_client_t *pClient, int iSamplerChannel, int iAudioOut, int iAudioIn )
1335     {
1336     char szQuery[LSCP_BUFSIZ];
1337    
1338     if (iSamplerChannel < 0 || iAudioOut < 0 || iAudioIn < 0)
1339     return LSCP_FAILED;
1340    
1341 capela 188 sprintf(szQuery, "SET CHANNEL AUDIO_OUTPUT_CHANNEL %d %d %d\r\n", iSamplerChannel, iAudioOut, iAudioIn);
1342 capela 107 return lscp_client_query(pClient, szQuery);
1343     }
1344    
1345    
1346     /**
1347     * Setting MIDI input type:
1348     * SET CHANNEL MIDI_INPUT_TYPE <sampler-channel> <midi-input-type>
1349     *
1350     * @param pClient Pointer to client instance structure.
1351     * @param iSamplerChannel Sampler channel number.
1352     * @param pszMidiDriver MIDI input driver type (e.g. "ALSA").
1353     *
1354     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1355     */
1356     lscp_status_t lscp_set_channel_midi_type ( lscp_client_t *pClient, int iSamplerChannel, const char *pszMidiDriver )
1357     {
1358     char szQuery[LSCP_BUFSIZ];
1359    
1360     if (iSamplerChannel < 0 || pszMidiDriver == NULL)
1361     return LSCP_FAILED;
1362    
1363     sprintf(szQuery, "SET CHANNEL MIDI_INPUT_TYPE %d %s\r\n", iSamplerChannel, pszMidiDriver);
1364     return lscp_client_query(pClient, szQuery);
1365     }
1366    
1367    
1368     /**
1369 capela 144 * Setting MIDI input device:
1370     * SET CHANNEL MIDI_INPUT_DEVICE <sampler-channel> <device-id>
1371     *
1372     * @param pClient Pointer to client instance structure.
1373     * @param iSamplerChannel Sampler channel number.
1374     * @param iMidiDevice MIDI input device number identifier.
1375 capela 946 *
1376     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1377 capela 144 */
1378     lscp_status_t lscp_set_channel_midi_device ( lscp_client_t *pClient, int iSamplerChannel, int iMidiDevice )
1379     {
1380     char szQuery[LSCP_BUFSIZ];
1381    
1382     if (iSamplerChannel < 0 || iMidiDevice < 0)
1383     return LSCP_FAILED;
1384    
1385     sprintf(szQuery, "SET CHANNEL MIDI_INPUT_DEVICE %d %d\r\n", iSamplerChannel, iMidiDevice);
1386     return lscp_client_query(pClient, szQuery);
1387     }
1388    
1389    
1390     /**
1391 capela 107 * Setting MIDI input port:
1392     * SET CHANNEL MIDI_INPUT_PORT <sampler-channel> <midi-input-port>
1393     *
1394     * @param pClient Pointer to client instance structure.
1395     * @param iSamplerChannel Sampler channel number.
1396     * @param iMidiPort MIDI input driver virtual port number.
1397     *
1398     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1399     */
1400     lscp_status_t lscp_set_channel_midi_port ( lscp_client_t *pClient, int iSamplerChannel, int iMidiPort )
1401     {
1402     char szQuery[LSCP_BUFSIZ];
1403    
1404     if (iSamplerChannel < 0 || iMidiPort < 0)
1405     return LSCP_FAILED;
1406    
1407     sprintf(szQuery, "SET CHANNEL MIDI_INPUT_PORT %d %d\r\n", iSamplerChannel, iMidiPort);
1408     return lscp_client_query(pClient, szQuery);
1409     }
1410    
1411    
1412     /**
1413     * Setting MIDI input channel:
1414     * SET CHANNEL MIDI_INPUT_CHANNEL <sampler-channel> <midi-input-chan>
1415     *
1416     * @param pClient Pointer to client instance structure.
1417     * @param iSamplerChannel Sampler channel number.
1418 capela 278 * @param iMidiChannel MIDI channel address number to listen (0-15) or
1419     * LSCP_MIDI_CHANNEL_ALL (16) to listen on all channels.
1420 capela 107 *
1421     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1422     */
1423     lscp_status_t lscp_set_channel_midi_channel ( lscp_client_t *pClient, int iSamplerChannel, int iMidiChannel )
1424     {
1425     char szQuery[LSCP_BUFSIZ];
1426    
1427 capela 254 if (iSamplerChannel < 0 || iMidiChannel < 0 || iMidiChannel > 16)
1428 capela 107 return LSCP_FAILED;
1429    
1430 capela 278 if (iMidiChannel == LSCP_MIDI_CHANNEL_ALL)
1431     sprintf(szQuery, "SET CHANNEL MIDI_INPUT_CHANNEL %d ALL\r\n", iSamplerChannel);
1432     else
1433 capela 107 sprintf(szQuery, "SET CHANNEL MIDI_INPUT_CHANNEL %d %d\r\n", iSamplerChannel, iMidiChannel);
1434     return lscp_client_query(pClient, szQuery);
1435     }
1436    
1437    
1438     /**
1439     * Setting channel volume:
1440     * SET CHANNEL VOLUME <sampler-channel> <volume>
1441     *
1442     * @param pClient Pointer to client instance structure.
1443     * @param iSamplerChannel Sampler channel number.
1444     * @param fVolume Sampler channel volume as a positive floating point
1445     * number, where a value less than 1.0 for attenuation,
1446     * and greater than 1.0 for amplification.
1447     *
1448     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1449     */
1450     lscp_status_t lscp_set_channel_volume ( lscp_client_t *pClient, int iSamplerChannel, float fVolume )
1451     {
1452     char szQuery[LSCP_BUFSIZ];
1453    
1454     if (iSamplerChannel < 0 || fVolume < 0.0)
1455     return LSCP_FAILED;
1456    
1457     sprintf(szQuery, "SET CHANNEL VOLUME %d %g\r\n", iSamplerChannel, fVolume);
1458     return lscp_client_query(pClient, szQuery);
1459     }
1460    
1461    
1462     /**
1463 capela 735 * Muting a sampler channel:
1464     * SET CHANNEL MUTE <sampler-channel> <mute>
1465     *
1466     * @param pClient Pointer to client instance structure.
1467     * @param iSamplerChannel Sampler channel number.
1468     * @param iMute Sampler channel mute state as a boolean value,
1469     * either 1 (one) to mute the channel or 0 (zero)
1470     * to unmute the channel.
1471     *
1472     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1473     */
1474     lscp_status_t lscp_set_channel_mute ( lscp_client_t *pClient, int iSamplerChannel, int iMute )
1475     {
1476     char szQuery[LSCP_BUFSIZ];
1477    
1478     if (iSamplerChannel < 0 || iMute < 0 || iMute > 1)
1479     return LSCP_FAILED;
1480    
1481 capela 742 sprintf(szQuery, "SET CHANNEL MUTE %d %d\r\n", iSamplerChannel, iMute);
1482 capela 735 return lscp_client_query(pClient, szQuery);
1483     }
1484    
1485    
1486     /**
1487     * Soloing a sampler channel:
1488     * SET CHANNEL SOLO <sampler-channel> <solo>
1489     *
1490     * @param pClient Pointer to client instance structure.
1491     * @param iSamplerChannel Sampler channel number.
1492     * @param iSolo Sampler channel solo state as a boolean value,
1493     * either 1 (one) to solo the channel or 0 (zero)
1494     * to unsolo the channel.
1495     *
1496     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1497     */
1498     lscp_status_t lscp_set_channel_solo ( lscp_client_t *pClient, int iSamplerChannel, int iSolo )
1499     {
1500     char szQuery[LSCP_BUFSIZ];
1501    
1502     if (iSamplerChannel < 0 || iSolo < 0 || iSolo > 1)
1503     return LSCP_FAILED;
1504    
1505 capela 742 sprintf(szQuery, "SET CHANNEL SOLO %d %d\r\n", iSamplerChannel, iSolo);
1506 capela 735 return lscp_client_query(pClient, szQuery);
1507     }
1508    
1509    
1510     /**
1511 capela 107 * Resetting a sampler channel:
1512     * RESET CHANNEL <sampler-channel>
1513     *
1514     * @param pClient Pointer to client instance structure.
1515     * @param iSamplerChannel Sampler channel number.
1516     *
1517     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1518     */
1519     lscp_status_t lscp_reset_channel ( lscp_client_t *pClient, int iSamplerChannel )
1520     {
1521     char szQuery[LSCP_BUFSIZ];
1522    
1523     if (iSamplerChannel < 0)
1524     return LSCP_FAILED;
1525    
1526     sprintf(szQuery, "RESET CHANNEL %d\r\n", iSamplerChannel);
1527     return lscp_client_query(pClient, szQuery);
1528     }
1529    
1530    
1531 capela 213 /**
1532     * Resetting the sampler:
1533     * RESET
1534     *
1535     * @param pClient Pointer to client instance structure.
1536     *
1537     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1538     */
1539     lscp_status_t lscp_reset_sampler ( lscp_client_t *pClient )
1540     {
1541     return lscp_client_query(pClient, "RESET\r\n");
1542     }
1543    
1544    
1545 capela 564 /**
1546     * Getting information about the server.
1547     * GET SERVER INFO
1548     *
1549     * @param pClient Pointer to client instance structure.
1550     *
1551     * @returns A pointer to a @ref lscp_server_info_t structure, with all the
1552     * information of the current connected server, or NULL in case of failure.
1553     */
1554     lscp_server_info_t *lscp_get_server_info ( lscp_client_t *pClient )
1555     {
1556     lscp_server_info_t *pServerInfo;
1557     const char *pszResult;
1558     const char *pszSeps = ":";
1559     const char *pszCrlf = "\r\n";
1560     char *pszToken;
1561     char *pch;
1562    
1563     // Lock this section up.
1564     lscp_mutex_lock(pClient->mutex);
1565    
1566     pServerInfo = &(pClient->server_info);
1567 capela 565 lscp_server_info_reset(pServerInfo);
1568 capela 564
1569 capela 948 if (lscp_client_call(pClient, "GET SERVER INFO\r\n", 1) == LSCP_OK) {
1570 capela 564 pszResult = lscp_client_get_result(pClient);
1571     pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch));
1572     while (pszToken) {
1573     if (strcasecmp(pszToken, "DESCRIPTION") == 0) {
1574     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1575     if (pszToken)
1576     lscp_unquote_dup(&(pServerInfo->description), &pszToken);
1577     }
1578     else if (strcasecmp(pszToken, "VERSION") == 0) {
1579     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1580     if (pszToken)
1581     lscp_unquote_dup(&(pServerInfo->version), &pszToken);
1582     }
1583     pszToken = lscp_strtok(NULL, pszSeps, &(pch));
1584     }
1585     }
1586     else pServerInfo = NULL;
1587    
1588     // Unlock this section down.
1589     lscp_mutex_unlock(pClient->mutex);
1590    
1591     return pServerInfo;
1592     }
1593    
1594    
1595 capela 946 /**
1596     * Current total number of active voices:
1597     * GET TOTAL_VOICE_COUNT
1598     *
1599     * @param pClient Pointer to client instance structure.
1600     *
1601     * @returns The total number of voices currently active,
1602     * -1 in case of failure.
1603     */
1604     int lscp_get_total_voice_count ( lscp_client_t *pClient )
1605     {
1606     int iVoiceCount = -1;
1607    
1608     // Lock this section up.
1609     lscp_mutex_lock(pClient->mutex);
1610    
1611 capela 948 if (lscp_client_call(pClient, "GET TOTAL_VOICE_COUNT\r\n", 0) == LSCP_OK)
1612 capela 946 iVoiceCount = atoi(lscp_client_get_result(pClient));
1613    
1614     // Unlock this section down.
1615     lscp_mutex_unlock(pClient->mutex);
1616    
1617     return iVoiceCount;
1618     }
1619    
1620    
1621     /**
1622     * Maximum amount of active voices:
1623     * GET TOTAL_VOICE_COUNT_MAX
1624     *
1625     * @param pClient Pointer to client instance structure.
1626     *
1627     * @returns The maximum amount of voices currently active,
1628     * -1 in case of failure.
1629     */
1630     int lscp_get_total_voice_count_max ( lscp_client_t *pClient )
1631     {
1632     int iVoiceCount = -1;
1633    
1634     // Lock this section up.
1635     lscp_mutex_lock(pClient->mutex);
1636    
1637 capela 948 if (lscp_client_call(pClient, "GET TOTAL_VOICE_COUNT_MAX\r\n", 0) == LSCP_OK)
1638 capela 946 iVoiceCount = atoi(lscp_client_get_result(pClient));
1639    
1640     // Unlock this section down.
1641     lscp_mutex_unlock(pClient->mutex);
1642    
1643     return iVoiceCount;
1644     }
1645    
1646    
1647     /**
1648     * Create or replace a MIDI instrumnet map entry:
1649     * MAP MIDI_INSTRUMENT <midi-bank-msb> <midi-bank-lsb> <midi-prog>
1650     * <engine-name> <filename> <instr-index> <volume> <load-mode> [<name>]
1651     *
1652     * @param pClient Pointer to client instance structure.
1653     * @param pMidiInstr MIDI instrument bank and program parameter key.
1654     * @param pszEngineName Engine name.
1655     * @param pszFileName Instrument file name.
1656     * @param iInstrIndex Instrument index number.
1657     * @param fVolume Reflects the master volume of the instrument as
1658     * a positive floating point number, where a value
1659     * less than 1.0 for attenuation, and greater than
1660     * 1.0 for amplification.
1661     * @param load_mode Instrument load life-time strategy, either
1662     * @ref LSCP_LOAD_DEFAULT, or
1663     * @ref LSCP_LOAD_ON_DEMAND, or
1664     * @ref LSCP_LOAD_ON_DEMAND_HOLD, or
1665     * @ref LSCP_LOAD_PERSISTENT.
1666     * @param pszName Instrument custom name for the map entry.
1667     *
1668     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1669     */
1670     lscp_status_t lscp_map_midi_instrument ( lscp_client_t *pClient, lscp_midi_instrument_t *pMidiInstr, const char *pszEngineName, const char *pszFileName, int iInstrIndex, float fVolume, lscp_load_mode_t load_mode, const char *pszName )
1671     {
1672     char szQuery[LSCP_BUFSIZ];
1673 capela 948
1674 capela 946 if (pMidiInstr->bank_msb < 0 || pMidiInstr->bank_msb > 127)
1675     return LSCP_FAILED;
1676     if (pMidiInstr->bank_lsb < 0 || pMidiInstr->bank_lsb > 127)
1677     return LSCP_FAILED;
1678     if (pMidiInstr->program < 0 || pMidiInstr->program > 127)
1679     return LSCP_FAILED;
1680     if (pszEngineName == NULL || pszFileName == NULL)
1681     return LSCP_FAILED;
1682 capela 948
1683     if (fVolume < 0.0f)
1684     fVolume = 1.0f;
1685    
1686 capela 946 sprintf(szQuery, "MAP MIDI_INSTRUMENT %d %d %d %s '%s' %d %g",
1687 capela 948 pMidiInstr->bank_msb, pMidiInstr->bank_lsb, pMidiInstr->program,
1688     pszEngineName, pszFileName, iInstrIndex, fVolume);
1689    
1690     switch (load_mode) {
1691     case LSCP_LOAD_PERSISTENT:
1692     strcat(szQuery, " PERSISTENT");
1693     break;
1694     case LSCP_LOAD_ON_DEMAND_HOLD:
1695     strcat(szQuery, " ON_DEMAND_HOLD");
1696     break;
1697     case LSCP_LOAD_ON_DEMAND:
1698     strcat(szQuery, " ON_DEMAND_HOLD");
1699     break;
1700     case LSCP_LOAD_DEFAULT:
1701     default:
1702     break;
1703     }
1704    
1705     if (pszName)
1706     sprintf(szQuery + strlen(szQuery), " '%s'", pszName);
1707    
1708     strcat(szQuery, "\r\n");
1709    
1710 capela 946 return lscp_client_query(pClient, szQuery);
1711     }
1712    
1713    
1714     /**
1715     * Remove an entry from the MIDI instrument map:
1716     * UNMAP MIDI_INSTRUMENT <midi-bank-msb> <midi-bank-lsb> <midi-prog>
1717     *
1718     * @param pClient Pointer to client instance structure.
1719     * @param pMidiInstr MIDI instrument bank and program parameter key.
1720     *
1721     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1722     */
1723     lscp_status_t lscp_unmap_midi_instrument ( lscp_client_t *pClient, lscp_midi_instrument_t *pMidiInstr )
1724     {
1725     char szQuery[LSCP_BUFSIZ];
1726    
1727     if (pMidiInstr->bank_msb < 0 || pMidiInstr->bank_msb > 127)
1728     return LSCP_FAILED;
1729     if (pMidiInstr->bank_lsb < 0 || pMidiInstr->bank_lsb > 127)
1730     return LSCP_FAILED;
1731     if (pMidiInstr->program < 0 || pMidiInstr->program > 127)
1732     return LSCP_FAILED;
1733    
1734     sprintf(szQuery, "UNMAP MIDI_INSTRUMENT %d %d %d\r\n",
1735     pMidiInstr->bank_msb, pMidiInstr->bank_lsb, pMidiInstr->program);
1736    
1737     return lscp_client_query(pClient, szQuery);
1738     }
1739    
1740    
1741     /**
1742     * Get the total count of MIDI instrument map entries:
1743     * GET MIDI_INSTRUMENTS
1744     *
1745     * @param pClient Pointer to client instance structure.
1746     *
1747     * @returns The current total number of MIDI instrument map entries
1748     * on success, -1 otherwise.
1749     */
1750     int lscp_get_midi_instruments ( lscp_client_t *pClient )
1751     {
1752     int iInstruments = -1;
1753    
1754     // Lock this section up.
1755     lscp_mutex_lock(pClient->mutex);
1756    
1757 capela 948 if (lscp_client_call(pClient, "GET MIDI_INSTRUMENTS\r\n", 0) == LSCP_OK)
1758 capela 946 iInstruments = atoi(lscp_client_get_result(pClient));
1759    
1760     // Unlock this section down.
1761     lscp_mutex_unlock(pClient->mutex);
1762    
1763     return iInstruments;
1764     }
1765    
1766    
1767     /**
1768 capela 948 * Getting indeces of all MIDI instrument map entries:
1769     * LIST MIDI_INSTRUMENTS
1770     *
1771     * @param pClient Pointer to client instance structure.
1772     *
1773     * @returns An array of @ref lscp_midi_instrument_t, terminated with the
1774     * {-1,-1,-1} triplet, NULL otherwise.
1775     */
1776     lscp_midi_instrument_t *lscp_list_midi_instruments ( lscp_client_t *pClient )
1777     {
1778     if (pClient == NULL)
1779     return NULL;
1780    
1781     // Lock this section up.
1782     lscp_mutex_lock(pClient->mutex);
1783    
1784     if (pClient->midi_instruments) {
1785     lscp_midi_instruments_destroy(pClient->midi_instruments);
1786     pClient->midi_instruments = NULL;
1787     }
1788    
1789     if (lscp_client_call(pClient, "LIST MIDI_INSTRUMENTS\r\n", 0) == LSCP_OK)
1790     pClient->midi_instruments = lscp_midi_instruments_create(lscp_client_get_result(pClient));
1791    
1792     // Unlock this section down.
1793     lscp_mutex_unlock(pClient->mutex);
1794    
1795     return pClient->midi_instruments;
1796     }
1797    
1798    
1799     /**
1800 capela 946 * Getting information about a MIDI instrument map entry:
1801     * GET MIDI_INSTRUMENT INFO <midi-bank-msb> <midi-bank-lsb> <midi-prog>
1802     *
1803     * @param pClient Pointer to client instance structure.
1804     * @param pMidiInstr MIDI instrument bank and program parameter key.
1805     *
1806     * @returns A pointer to a @ref lscp_midi_instrument_info_t structure,
1807     * with all the information of the given MIDI instrument map entry,
1808     * or NULL in case of failure.
1809     */
1810     lscp_midi_instrument_info_t *lscp_get_midi_instrument_info ( lscp_client_t *pClient, lscp_midi_instrument_t *pMidiInstr )
1811     {
1812     lscp_midi_instrument_info_t *pInstrInfo;
1813     char szQuery[LSCP_BUFSIZ];
1814     const char *pszResult;
1815     const char *pszSeps = ":";
1816     const char *pszCrlf = "\r\n";
1817     char *pszToken;
1818     char *pch;
1819 capela 948
1820 capela 946 if (pMidiInstr->bank_msb < 0 || pMidiInstr->bank_msb > 127)
1821     return NULL;
1822     if (pMidiInstr->bank_lsb < 0 || pMidiInstr->bank_lsb > 127)
1823     return NULL;
1824     if (pMidiInstr->program < 0 || pMidiInstr->program > 127)
1825     return NULL;
1826 capela 948
1827 capela 946 // Lock this section up.
1828     lscp_mutex_lock(pClient->mutex);
1829 capela 948
1830 capela 946 pInstrInfo = &(pClient->midi_instrument_info);
1831     lscp_midi_instrument_info_reset(pInstrInfo);
1832 capela 948
1833 capela 946 sprintf(szQuery, "GET MIDI_INSTRUMENT INFO %d %d %d\r\n",
1834 capela 948 pMidiInstr->bank_msb, pMidiInstr->bank_lsb, pMidiInstr->program);
1835     if (lscp_client_call(pClient, szQuery, 1) == LSCP_OK) {
1836 capela 946 pszResult = lscp_client_get_result(pClient);
1837     pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch));
1838     while (pszToken) {
1839     if (strcasecmp(pszToken, "NAME") == 0) {
1840     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1841     if (pszToken)
1842     lscp_unquote_dup(&(pInstrInfo->name), &pszToken);
1843     }
1844     else if (strcasecmp(pszToken, "ENGINE_NAME") == 0) {
1845     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1846     if (pszToken)
1847     lscp_unquote_dup(&(pInstrInfo->engine_name), &pszToken);
1848     }
1849     else if (strcasecmp(pszToken, "INSTRUMENT_FILE") == 0) {
1850     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1851     if (pszToken)
1852     lscp_unquote_dup(&(pInstrInfo->instrument_file), &pszToken);
1853     }
1854     else if (strcasecmp(pszToken, "INSTRUMENT_NR") == 0) {
1855     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1856     if (pszToken)
1857     pInstrInfo->instrument_nr = atoi(lscp_ltrim(pszToken));
1858     }
1859     else if (strcasecmp(pszToken, "INSTRUMENT_NAME") == 0) {
1860     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1861     if (pszToken)
1862     lscp_unquote_dup(&(pInstrInfo->instrument_name), &pszToken);
1863     }
1864     else if (strcasecmp(pszToken, "LOAD_MODE") == 0) {
1865     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1866     if (pszToken) {
1867     pszToken = lscp_ltrim(pszToken);
1868     if (strcasecmp(pszToken, "ON_DEMAND") == 0)
1869     pInstrInfo->load_mode = LSCP_LOAD_ON_DEMAND;
1870     else
1871     if (strcasecmp(pszToken, "ON_DEMAND_HOLD") == 0)
1872     pInstrInfo->load_mode = LSCP_LOAD_ON_DEMAND_HOLD;
1873     else
1874     if (strcasecmp(pszToken, "PERSISTENT") == 0)
1875     pInstrInfo->load_mode = LSCP_LOAD_PERSISTENT;
1876     else
1877     pInstrInfo->load_mode = LSCP_LOAD_DEFAULT;
1878     }
1879     }
1880     else if (strcasecmp(pszToken, "VOLUME") == 0) {
1881     pszToken = lscp_strtok(NULL, pszCrlf, &(pch));
1882     if (pszToken)
1883     pInstrInfo->volume = (float) atof(lscp_ltrim(pszToken));
1884     }
1885     pszToken = lscp_strtok(NULL, pszSeps, &(pch));
1886 capela 948 }
1887 capela 946 }
1888     else pInstrInfo = NULL;
1889 capela 948
1890 capela 946 // Unlock this section down.
1891     lscp_mutex_unlock(pClient->mutex);
1892 capela 948
1893 capela 946 return pInstrInfo;
1894     }
1895    
1896    
1897     /**
1898     * Clear the MIDI instrumnet map:
1899     * CLEAR MIDI_INSTRUMENTS
1900     *
1901     * @param pClient Pointer to client instance structure.
1902     * @param iSamplerChannel Sampler channel number.
1903     *
1904     * @returns LSCP_OK on success, LSCP_FAILED otherwise.
1905     */
1906     lscp_status_t lscp_clear_midi_instruments ( lscp_client_t *pClient )
1907     {
1908     return lscp_client_query(pClient, "CLEAR MIDI_INSTRUMENTS\r\n");
1909     }
1910    
1911    
1912 capela 107 // end of client.c

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