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// client.c |
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// |
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/**************************************************************************** |
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liblscp - LinuxSampler Control Protocol API |
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Copyright (C) 2004-2006, rncbc aka Rui Nuno Capela. All rights reserved. |
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|
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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|
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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|
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You should 14have received a copy of the GNU Lesser General Public |
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License along with this library; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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|
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*****************************************************************************/ |
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|
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#include "common.h" |
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|
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// Default timeout value (in milliseconds). |
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#define LSCP_TIMEOUT_MSECS 500 |
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|
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|
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// Local prototypes. |
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|
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static void _lscp_client_evt_proc (void *pvClient); |
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|
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static lscp_status_t _lscp_client_evt_connect (lscp_client_t *pClient); |
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static lscp_status_t _lscp_client_evt_request (lscp_client_t *pClient, int iSubscribe, lscp_event_t event); |
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|
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|
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//------------------------------------------------------------------------- |
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// Event service (datagram oriented). |
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|
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static void _lscp_client_evt_proc ( void *pvClient ) |
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{ |
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lscp_client_t *pClient = (lscp_client_t *) pvClient; |
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|
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fd_set fds; // File descriptor list for select(). |
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int fd, fdmax; // Maximum file descriptor number. |
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struct timeval tv; // For specifying a timeout value. |
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int iSelect; // Holds select return status. |
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int iTimeout; |
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|
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char achBuffer[LSCP_BUFSIZ]; |
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int cchBuffer; |
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const char *pszSeps = ":\r\n"; |
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char * pszToken; |
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char * pch; |
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int cchToken; |
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lscp_event_t event; |
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|
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#ifdef DEBUG |
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fprintf(stderr, "_lscp_client_evt_proc: Client waiting for events.\n"); |
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#endif |
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|
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while (pClient->evt.iState) { |
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|
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// Prepare for waiting on select... |
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fd = (int) pClient->evt.sock; |
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FD_ZERO(&fds); |
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FD_SET((unsigned int) fd, &fds); |
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fdmax = fd; |
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|
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// Use the timeout (x10) select feature ... |
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iTimeout = 10 * pClient->iTimeout; |
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if (iTimeout >= 1000) { |
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tv.tv_sec = iTimeout / 1000; |
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iTimeout -= tv.tv_sec * 1000; |
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} |
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else tv.tv_sec = 0; |
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tv.tv_usec = iTimeout * 1000; |
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|
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// Wait for event... |
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iSelect = select(fdmax + 1, &fds, NULL, NULL, &tv); |
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if (iSelect > 0 && FD_ISSET(fd, &fds)) { |
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// May recv now... |
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cchBuffer = recv(pClient->evt.sock, achBuffer, sizeof(achBuffer), 0); |
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if (cchBuffer > 0) { |
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// Make sure received buffer it's null terminated. |
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achBuffer[cchBuffer] = (char) 0; |
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// Parse for the notification event message... |
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pszToken = lscp_strtok(achBuffer, pszSeps, &(pch)); // Have "NOTIFY". |
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if (strcasecmp(pszToken, "NOTIFY") == 0) { |
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pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
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event = lscp_event_from_text(pszToken); |
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// And pick the rest of data... |
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pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
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cchToken = (pszToken == NULL ? 0 : strlen(pszToken)); |
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// Double-check if we're really up to it... |
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if (pClient->events & event) { |
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// Invoke the client event callback... |
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if ((*pClient->pfnCallback)( |
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pClient, |
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event, |
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pszToken, |
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cchToken, |
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pClient->pvData) != LSCP_OK) { |
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pClient->evt.iState = 0; |
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} |
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} |
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} |
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} else { |
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lscp_socket_perror("_lscp_client_evt_proc: recv"); |
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pClient->evt.iState = 0; |
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} |
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} // Check if select has in error. |
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else if (iSelect < 0) { |
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lscp_socket_perror("_lscp_client_evt_proc: select"); |
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pClient->evt.iState = 0; |
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} |
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|
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// Finally, always signal the event. |
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lscp_cond_signal(pClient->cond); |
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} |
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|
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#ifdef DEBUG |
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fprintf(stderr, "_lscp_client_evt_proc: Client closing.\n"); |
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#endif |
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} |
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|
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|
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//------------------------------------------------------------------------- |
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// Event subscription helpers. |
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|
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// Open the event service socket connection. |
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static lscp_status_t _lscp_client_evt_connect ( lscp_client_t *pClient ) |
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{ |
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lscp_socket_t sock; |
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struct sockaddr_in addr; |
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int cAddr; |
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#if defined(WIN32) |
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int iSockOpt = (-1); |
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#endif |
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|
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// Prepare the event connection socket... |
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sock = socket(AF_INET, SOCK_STREAM, 0); |
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if (sock == INVALID_SOCKET) { |
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lscp_socket_perror("_lscp_client_evt_connect: socket"); |
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return LSCP_FAILED; |
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} |
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|
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#if defined(WIN32) |
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if (setsockopt(sock, SOL_SOCKET, SO_DONTLINGER, (char *) &iSockOpt, sizeof(int)) == SOCKET_ERROR) |
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lscp_socket_perror("lscp_client_evt_connect: setsockopt(SO_DONTLINGER)"); |
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#endif |
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|
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#ifdef DEBUG |
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lscp_socket_getopts("_lscp_client_evt_connect:", sock); |
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#endif |
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|
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// Use same address of the command connection. |
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cAddr = sizeof(struct sockaddr_in); |
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memmove((char *) &addr, &(pClient->cmd.addr), cAddr); |
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|
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// Start the connection... |
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if (connect(sock, (struct sockaddr *) &addr, cAddr) == SOCKET_ERROR) { |
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lscp_socket_perror("_lscp_client_evt_connect: connect"); |
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closesocket(sock); |
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return LSCP_FAILED; |
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} |
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|
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// Set our socket agent struct... |
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lscp_socket_agent_init(&(pClient->evt), sock, &addr, cAddr); |
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|
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// And finally the service thread... |
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return lscp_socket_agent_start(&(pClient->evt), _lscp_client_evt_proc, pClient, 0); |
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} |
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|
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|
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// Subscribe to a single event. |
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static lscp_status_t _lscp_client_evt_request ( lscp_client_t *pClient, int iSubscribe, lscp_event_t event ) |
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{ |
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const char *pszEvent; |
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char szQuery[LSCP_BUFSIZ]; |
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int cchQuery; |
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|
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if (pClient == NULL) |
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return LSCP_FAILED; |
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|
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// Which (single) event? |
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pszEvent = lscp_event_to_text(event); |
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if (pszEvent == NULL) |
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return LSCP_FAILED; |
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|
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// Build the query string... |
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cchQuery = sprintf(szQuery, "%sSUBSCRIBE %s\n\n", (iSubscribe == 0 ? "UN" : ""), pszEvent); |
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// Just send data, forget result... |
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if (send(pClient->evt.sock, szQuery, cchQuery, 0) < cchQuery) { |
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lscp_socket_perror("_lscp_client_evt_request: send"); |
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return LSCP_FAILED; |
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} |
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|
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// Wait on response. |
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lscp_cond_wait(pClient->cond, pClient->mutex); |
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|
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// Update as naively as we can... |
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if (iSubscribe) |
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pClient->events |= event; |
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else |
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pClient->events &= ~event; |
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|
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return LSCP_OK; |
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} |
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|
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|
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//------------------------------------------------------------------------- |
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// Client versioning teller fuunction. |
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|
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|
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/** Retrieve the current client library version string. */ |
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const char* lscp_client_package (void) { return LSCP_PACKAGE; } |
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|
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/** Retrieve the current client library version string. */ |
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const char* lscp_client_version (void) { return LSCP_VERSION; } |
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|
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/** Retrieve the current client library build timestamp string. */ |
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const char* lscp_client_build (void) { return __DATE__ " " __TIME__; } |
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|
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|
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//------------------------------------------------------------------------- |
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// Client socket functions. |
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|
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/** |
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* Create a client instance, estabilishing a connection to a server hostname, |
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* which must be listening on the given port. A client callback function is |
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* also supplied for server notification event handling. |
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* |
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* @param pszHost Hostname of the linuxsampler listening server. |
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* @param iPort Port number of the linuxsampler listening server. |
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* @param pfnCallback Callback function to receive event notifications. |
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* @param pvData User context opaque data, that will be passed |
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* to the callback function. |
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* |
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* @returns The new client instance pointer if successfull, which shall be |
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* used on all subsequent client calls, NULL otherwise. |
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*/ |
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lscp_client_t* lscp_client_create ( const char *pszHost, int iPort, lscp_client_proc_t pfnCallback, void *pvData ) |
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{ |
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lscp_client_t *pClient; |
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struct hostent *pHost; |
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lscp_socket_t sock; |
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struct sockaddr_in addr; |
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int cAddr; |
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#if defined(WIN32) |
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int iSockOpt = (-1); |
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#endif |
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|
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if (pfnCallback == NULL) { |
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fprintf(stderr, "lscp_client_create: Invalid client callback function.\n"); |
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return NULL; |
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} |
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|
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pHost = gethostbyname(pszHost); |
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if (pHost == NULL) { |
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lscp_socket_herror("lscp_client_create: gethostbyname"); |
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return NULL; |
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} |
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|
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// Allocate client descriptor... |
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|
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pClient = (lscp_client_t *) malloc(sizeof(lscp_client_t)); |
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if (pClient == NULL) { |
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fprintf(stderr, "lscp_client_create: Out of memory.\n"); |
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return NULL; |
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} |
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memset(pClient, 0, sizeof(lscp_client_t)); |
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|
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pClient->pfnCallback = pfnCallback; |
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pClient->pvData = pvData; |
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|
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#ifdef DEBUG |
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fprintf(stderr, "lscp_client_create: pClient=%p: pszHost=%s iPort=%d.\n", pClient, pszHost, iPort); |
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#endif |
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|
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// Prepare the command connection socket... |
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|
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sock = socket(AF_INET, SOCK_STREAM, 0); |
284 |
if (sock == INVALID_SOCKET) { |
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lscp_socket_perror("lscp_client_create: cmd: socket"); |
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free(pClient); |
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return NULL; |
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} |
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|
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#if defined(WIN32) |
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if (setsockopt(sock, SOL_SOCKET, SO_DONTLINGER, (char *) &iSockOpt, sizeof(int)) == SOCKET_ERROR) |
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lscp_socket_perror("lscp_client_create: cmd: setsockopt(SO_DONTLINGER)"); |
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#endif |
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|
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#ifdef DEBUG |
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lscp_socket_getopts("lscp_client_create: cmd", sock); |
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#endif |
298 |
|
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cAddr = sizeof(struct sockaddr_in); |
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memset((char *) &addr, 0, cAddr); |
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addr.sin_family = pHost->h_addrtype; |
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memmove((char *) &(addr.sin_addr), pHost->h_addr, pHost->h_length); |
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addr.sin_port = htons((short) iPort); |
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|
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if (connect(sock, (struct sockaddr *) &addr, cAddr) == SOCKET_ERROR) { |
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lscp_socket_perror("lscp_client_create: cmd: connect"); |
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closesocket(sock); |
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free(pClient); |
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return NULL; |
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} |
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|
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// Initialize the command socket agent struct... |
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lscp_socket_agent_init(&(pClient->cmd), sock, &addr, cAddr); |
314 |
|
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#ifdef DEBUG |
316 |
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 |
#endif |
318 |
|
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// Initialize the event service socket struct... |
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lscp_socket_agent_init(&(pClient->evt), INVALID_SOCKET, NULL, 0); |
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// No events subscribed, yet. |
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pClient->events = LSCP_EVENT_NONE; |
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// Initialize cached members. |
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pClient->audio_drivers = NULL; |
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pClient->midi_drivers = NULL; |
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pClient->audio_devices = NULL; |
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pClient->midi_devices = NULL; |
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pClient->engines = NULL; |
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pClient->channels = NULL; |
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lscp_driver_info_init(&(pClient->audio_driver_info)); |
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lscp_driver_info_init(&(pClient->midi_driver_info)); |
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lscp_device_info_init(&(pClient->audio_device_info)); |
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lscp_device_info_init(&(pClient->midi_device_info)); |
334 |
lscp_param_info_init(&(pClient->audio_param_info)); |
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lscp_param_info_init(&(pClient->midi_param_info)); |
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lscp_device_port_info_init(&(pClient->audio_channel_info)); |
337 |
lscp_device_port_info_init(&(pClient->midi_port_info)); |
338 |
lscp_param_info_init(&(pClient->audio_channel_param_info)); |
339 |
lscp_param_info_init(&(pClient->midi_port_param_info)); |
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lscp_server_info_init(&(pClient->server_info)); |
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lscp_engine_info_init(&(pClient->engine_info)); |
342 |
lscp_channel_info_init(&(pClient->channel_info)); |
343 |
// Initialize error stuff. |
344 |
pClient->pszResult = NULL; |
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pClient->iErrno = -1; |
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// Stream usage stuff. |
347 |
pClient->buffer_fill = NULL; |
348 |
pClient->iStreamCount = 0; |
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// Default timeout value. |
350 |
pClient->iTimeout = LSCP_TIMEOUT_MSECS; |
351 |
pClient->iTimeoutCount = 0; |
352 |
|
353 |
// Initialize the transaction mutex. |
354 |
lscp_mutex_init(pClient->mutex); |
355 |
lscp_cond_init(pClient->cond); |
356 |
|
357 |
// Finally we've some success... |
358 |
return pClient; |
359 |
} |
360 |
|
361 |
|
362 |
/** |
363 |
* Wait for a client instance to terminate graciously. |
364 |
* |
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* @param pClient Pointer to client instance structure. |
366 |
*/ |
367 |
lscp_status_t lscp_client_join ( lscp_client_t *pClient ) |
368 |
{ |
369 |
if (pClient == NULL) |
370 |
return LSCP_FAILED; |
371 |
|
372 |
#ifdef DEBUG |
373 |
fprintf(stderr, "lscp_client_join: pClient=%p.\n", pClient); |
374 |
#endif |
375 |
|
376 |
// lscp_socket_agent_join(&(pClient->evt)); |
377 |
lscp_socket_agent_join(&(pClient->cmd)); |
378 |
|
379 |
return LSCP_OK; |
380 |
} |
381 |
|
382 |
|
383 |
/** |
384 |
* Terminate and destroy a client instance. |
385 |
* |
386 |
* @param pClient Pointer to client instance structure. |
387 |
* |
388 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
389 |
*/ |
390 |
lscp_status_t lscp_client_destroy ( lscp_client_t *pClient ) |
391 |
{ |
392 |
if (pClient == NULL) |
393 |
return LSCP_FAILED; |
394 |
|
395 |
#ifdef DEBUG |
396 |
fprintf(stderr, "lscp_client_destroy: pClient=%p.\n", pClient); |
397 |
#endif |
398 |
|
399 |
// Lock this section up. |
400 |
lscp_mutex_lock(pClient->mutex); |
401 |
|
402 |
// Free up all cached members. |
403 |
lscp_channel_info_free(&(pClient->channel_info)); |
404 |
lscp_engine_info_free(&(pClient->engine_info)); |
405 |
lscp_server_info_free(&(pClient->server_info)); |
406 |
lscp_param_info_free(&(pClient->midi_port_param_info)); |
407 |
lscp_param_info_free(&(pClient->audio_channel_param_info)); |
408 |
lscp_device_port_info_free(&(pClient->midi_port_info)); |
409 |
lscp_device_port_info_free(&(pClient->audio_channel_info)); |
410 |
lscp_param_info_free(&(pClient->midi_param_info)); |
411 |
lscp_param_info_free(&(pClient->audio_param_info)); |
412 |
lscp_device_info_free(&(pClient->midi_device_info)); |
413 |
lscp_device_info_free(&(pClient->audio_device_info)); |
414 |
lscp_driver_info_free(&(pClient->midi_driver_info)); |
415 |
lscp_driver_info_free(&(pClient->audio_driver_info)); |
416 |
// Free available engine table. |
417 |
lscp_szsplit_destroy(pClient->audio_drivers); |
418 |
lscp_szsplit_destroy(pClient->midi_drivers); |
419 |
lscp_isplit_destroy(pClient->audio_devices); |
420 |
lscp_isplit_destroy(pClient->midi_devices); |
421 |
lscp_szsplit_destroy(pClient->engines); |
422 |
lscp_isplit_destroy(pClient->channels); |
423 |
// Make them null. |
424 |
pClient->audio_drivers = NULL; |
425 |
pClient->midi_drivers = NULL; |
426 |
pClient->engines = NULL; |
427 |
// Free result error stuff. |
428 |
lscp_client_set_result(pClient, NULL, 0); |
429 |
// Free stream usage stuff. |
430 |
if (pClient->buffer_fill) |
431 |
free(pClient->buffer_fill); |
432 |
pClient->buffer_fill = NULL; |
433 |
pClient->iStreamCount = 0; |
434 |
pClient->iTimeout = 0; |
435 |
|
436 |
// Free socket agents. |
437 |
lscp_socket_agent_free(&(pClient->evt)); |
438 |
lscp_socket_agent_free(&(pClient->cmd)); |
439 |
|
440 |
// Last but not least, free good ol'transaction mutex. |
441 |
lscp_mutex_unlock(pClient->mutex); |
442 |
lscp_mutex_destroy(pClient->mutex); |
443 |
lscp_cond_destroy(pClient->cond); |
444 |
|
445 |
free(pClient); |
446 |
|
447 |
return LSCP_OK; |
448 |
} |
449 |
|
450 |
|
451 |
/** |
452 |
* Set the client transaction timeout interval. |
453 |
* |
454 |
* @param pClient Pointer to client instance structure. |
455 |
* @param iTimeout Transaction timeout in milliseconds. |
456 |
* |
457 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
458 |
*/ |
459 |
lscp_status_t lscp_client_set_timeout ( lscp_client_t *pClient, int iTimeout ) |
460 |
{ |
461 |
if (pClient == NULL) |
462 |
return LSCP_FAILED; |
463 |
if (iTimeout < 0) |
464 |
return LSCP_FAILED; |
465 |
|
466 |
pClient->iTimeout = iTimeout; |
467 |
return LSCP_OK; |
468 |
} |
469 |
|
470 |
|
471 |
/** |
472 |
* Get the client transaction timeout interval. |
473 |
* |
474 |
* @param pClient Pointer to client instance structure. |
475 |
* |
476 |
* @returns The current timeout value milliseconds, -1 in case of failure. |
477 |
*/ |
478 |
int lscp_client_get_timeout ( lscp_client_t *pClient ) |
479 |
{ |
480 |
if (pClient == NULL) |
481 |
return -1; |
482 |
|
483 |
return pClient->iTimeout; |
484 |
} |
485 |
|
486 |
|
487 |
//------------------------------------------------------------------------- |
488 |
// Client common protocol functions. |
489 |
|
490 |
/** |
491 |
* Submit a command query line string to the server. The query string |
492 |
* must be cr/lf and null terminated. Besides the return code, the |
493 |
* specific server response to the command request is made available |
494 |
* by the @ref lscp_client_get_result and @ref lscp_client_get_errno |
495 |
* function calls. |
496 |
* |
497 |
* @param pClient Pointer to client instance structure. |
498 |
* @param pszQuery Command request line to be sent to server, |
499 |
* must be cr/lf and null terminated. |
500 |
* |
501 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
502 |
*/ |
503 |
lscp_status_t lscp_client_query ( lscp_client_t *pClient, const char *pszQuery ) |
504 |
{ |
505 |
lscp_status_t ret; |
506 |
|
507 |
// Lock this section up. |
508 |
lscp_mutex_lock(pClient->mutex); |
509 |
|
510 |
// Just make the now guarded call. |
511 |
ret = lscp_client_call(pClient, pszQuery); |
512 |
|
513 |
// Unlock this section down. |
514 |
lscp_mutex_unlock(pClient->mutex); |
515 |
|
516 |
return ret; |
517 |
} |
518 |
|
519 |
/** |
520 |
* Get the last received result string. In case of error or warning, |
521 |
* this is the text of the error or warning message issued. |
522 |
* |
523 |
* @param pClient Pointer to client instance structure. |
524 |
* |
525 |
* @returns A pointer to the literal null-terminated result string as |
526 |
* of the last command request. |
527 |
*/ |
528 |
const char *lscp_client_get_result ( lscp_client_t *pClient ) |
529 |
{ |
530 |
if (pClient == NULL) |
531 |
return NULL; |
532 |
|
533 |
return pClient->pszResult; |
534 |
} |
535 |
|
536 |
|
537 |
/** |
538 |
* Get the last error/warning number received. |
539 |
* |
540 |
* @param pClient Pointer to client instance structure. |
541 |
* |
542 |
* @returns The numerical value of the last error or warning |
543 |
* response code received. |
544 |
*/ |
545 |
int lscp_client_get_errno ( lscp_client_t *pClient ) |
546 |
{ |
547 |
if (pClient == NULL) |
548 |
return -1; |
549 |
|
550 |
return pClient->iErrno; |
551 |
} |
552 |
|
553 |
|
554 |
//------------------------------------------------------------------------- |
555 |
// Client registration protocol functions. |
556 |
|
557 |
/** |
558 |
* Register frontend for receiving event messages: |
559 |
* SUBSCRIBE CHANNEL_COUNT | VOICE_COUNT | STREAM_COUNT | BUFFER_FILL |
560 |
* | CHANNEL_INFO | MISCELLANEOUS |
561 |
* |
562 |
* @param pClient Pointer to client instance structure. |
563 |
* @param events Bit-wise OR'ed event flags to subscribe. |
564 |
* |
565 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
566 |
*/ |
567 |
lscp_status_t lscp_client_subscribe ( lscp_client_t *pClient, lscp_event_t events ) |
568 |
{ |
569 |
lscp_status_t ret = LSCP_FAILED; |
570 |
|
571 |
if (pClient == NULL) |
572 |
return LSCP_FAILED; |
573 |
|
574 |
// Lock this section up. |
575 |
lscp_mutex_lock(pClient->mutex); |
576 |
|
577 |
// If applicable, start the alternate connection... |
578 |
if (pClient->events == LSCP_EVENT_NONE) |
579 |
ret = _lscp_client_evt_connect(pClient); |
580 |
|
581 |
// Send the subscription commands. |
582 |
if (ret == LSCP_OK && (events & LSCP_EVENT_CHANNEL_COUNT)) |
583 |
ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_CHANNEL_COUNT); |
584 |
if (ret == LSCP_OK && (events & LSCP_EVENT_VOICE_COUNT)) |
585 |
ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_VOICE_COUNT); |
586 |
if (ret == LSCP_OK && (events & LSCP_EVENT_STREAM_COUNT)) |
587 |
ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_STREAM_COUNT); |
588 |
if (ret == LSCP_OK && (events & LSCP_EVENT_BUFFER_FILL)) |
589 |
ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_BUFFER_FILL); |
590 |
if (ret == LSCP_OK && (events & LSCP_EVENT_CHANNEL_INFO)) |
591 |
ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_CHANNEL_INFO); |
592 |
if (ret == LSCP_OK && (events & LSCP_EVENT_MISCELLANEOUS)) |
593 |
ret = _lscp_client_evt_request(pClient, 1, LSCP_EVENT_MISCELLANEOUS); |
594 |
|
595 |
// Unlock this section down. |
596 |
lscp_mutex_unlock(pClient->mutex); |
597 |
|
598 |
return ret; |
599 |
} |
600 |
|
601 |
|
602 |
/** |
603 |
* Deregister frontend from receiving UDP event messages anymore: |
604 |
* SUBSCRIBE CHANNEL_COUNT | VOICE_COUNT | STREAM_COUNT | BUFFER_FILL |
605 |
* | CHANNEL_INFO | MISCELLANEOUS |
606 |
* |
607 |
* @param pClient Pointer to client instance structure. |
608 |
* @param events Bit-wise OR'ed event flags to unsubscribe. |
609 |
* |
610 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
611 |
*/ |
612 |
lscp_status_t lscp_client_unsubscribe ( lscp_client_t *pClient, lscp_event_t events ) |
613 |
{ |
614 |
lscp_status_t ret = LSCP_OK; |
615 |
|
616 |
if (pClient == NULL) |
617 |
return LSCP_FAILED; |
618 |
|
619 |
// Lock this section up. |
620 |
lscp_mutex_lock(pClient->mutex); |
621 |
|
622 |
// Send the unsubscription commands. |
623 |
if (ret == LSCP_OK && (events & LSCP_EVENT_CHANNEL_COUNT)) |
624 |
ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_CHANNEL_COUNT); |
625 |
if (ret == LSCP_OK && (events & LSCP_EVENT_VOICE_COUNT)) |
626 |
ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_VOICE_COUNT); |
627 |
if (ret == LSCP_OK && (events & LSCP_EVENT_STREAM_COUNT)) |
628 |
ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_STREAM_COUNT); |
629 |
if (ret == LSCP_OK && (events & LSCP_EVENT_BUFFER_FILL)) |
630 |
ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_BUFFER_FILL); |
631 |
if (ret == LSCP_OK && (events & LSCP_EVENT_CHANNEL_INFO)) |
632 |
ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_CHANNEL_INFO); |
633 |
if (ret == LSCP_OK && (events & LSCP_EVENT_MISCELLANEOUS)) |
634 |
ret = _lscp_client_evt_request(pClient, 0, LSCP_EVENT_MISCELLANEOUS); |
635 |
|
636 |
// If necessary, close the alternate connection... |
637 |
if (pClient->events == LSCP_EVENT_NONE) |
638 |
lscp_socket_agent_free(&(pClient->evt)); |
639 |
|
640 |
// Unlock this section down. |
641 |
lscp_mutex_unlock(pClient->mutex); |
642 |
|
643 |
return ret; |
644 |
} |
645 |
|
646 |
|
647 |
/** |
648 |
* Getting current subscribed events. |
649 |
* |
650 |
* @param pClient Pointer to client instance structure. |
651 |
* |
652 |
* @returns The current subscrived bit-wise OR'ed event flags. |
653 |
*/ |
654 |
lscp_event_t lscp_client_get_events ( lscp_client_t *pClient ) |
655 |
{ |
656 |
if (pClient == NULL) |
657 |
return LSCP_EVENT_NONE; |
658 |
|
659 |
return pClient->events; |
660 |
} |
661 |
|
662 |
|
663 |
//------------------------------------------------------------------------- |
664 |
// Client command protocol functions. |
665 |
|
666 |
/** |
667 |
* Loading an instrument: |
668 |
* LOAD INSTRUMENT <filename> <instr-index> <sampler-channel> |
669 |
* |
670 |
* @param pClient Pointer to client instance structure. |
671 |
* @param pszFileName Instrument file name. |
672 |
* @param iInstrIndex Instrument index number. |
673 |
* @param iSamplerChannel Sampler Channel. |
674 |
* |
675 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
676 |
*/ |
677 |
lscp_status_t lscp_load_instrument ( lscp_client_t *pClient, const char *pszFileName, int iInstrIndex, int iSamplerChannel ) |
678 |
{ |
679 |
char szQuery[LSCP_BUFSIZ]; |
680 |
|
681 |
if (pszFileName == NULL || iSamplerChannel < 0) |
682 |
return LSCP_FAILED; |
683 |
|
684 |
sprintf(szQuery, "LOAD INSTRUMENT '%s' %d %d\r\n", pszFileName, iInstrIndex, iSamplerChannel); |
685 |
return lscp_client_query(pClient, szQuery); |
686 |
} |
687 |
|
688 |
|
689 |
/** |
690 |
* Loading an instrument in the background (non modal): |
691 |
* LOAD INSTRUMENT NON_MODAL <filename> <instr-index> <sampler-channel> |
692 |
* |
693 |
* @param pClient Pointer to client instance structure. |
694 |
* @param pszFileName Instrument file name. |
695 |
* @param iInstrIndex Instrument index number. |
696 |
* @param iSamplerChannel Sampler Channel. |
697 |
* |
698 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
699 |
*/ |
700 |
lscp_status_t lscp_load_instrument_non_modal ( lscp_client_t *pClient, const char *pszFileName, int iInstrIndex, int iSamplerChannel ) |
701 |
{ |
702 |
char szQuery[LSCP_BUFSIZ]; |
703 |
|
704 |
if (pszFileName == NULL || iSamplerChannel < 0) |
705 |
return LSCP_FAILED; |
706 |
|
707 |
sprintf(szQuery, "LOAD INSTRUMENT NON_MODAL '%s' %d %d\r\n", pszFileName, iInstrIndex, iSamplerChannel); |
708 |
return lscp_client_query(pClient, szQuery); |
709 |
} |
710 |
|
711 |
|
712 |
/** |
713 |
* Loading a sampler engine: |
714 |
* LOAD ENGINE <engine-name> <sampler-channel> |
715 |
* |
716 |
* @param pClient Pointer to client instance structure. |
717 |
* @param pszEngineName Engine name. |
718 |
* @param iSamplerChannel Sampler channel number. |
719 |
* |
720 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
721 |
*/ |
722 |
lscp_status_t lscp_load_engine ( lscp_client_t *pClient, const char *pszEngineName, int iSamplerChannel ) |
723 |
{ |
724 |
char szQuery[LSCP_BUFSIZ]; |
725 |
|
726 |
if (pszEngineName == NULL || iSamplerChannel < 0) |
727 |
return LSCP_FAILED; |
728 |
|
729 |
sprintf(szQuery, "LOAD ENGINE %s %d\r\n", pszEngineName, iSamplerChannel); |
730 |
return lscp_client_query(pClient, szQuery); |
731 |
} |
732 |
|
733 |
|
734 |
/** |
735 |
* Current number of sampler channels: |
736 |
* GET CHANNELS |
737 |
* |
738 |
* @param pClient Pointer to client instance structure. |
739 |
* |
740 |
* @returns The current total number of sampler channels on success, |
741 |
* -1 otherwise. |
742 |
*/ |
743 |
int lscp_get_channels ( lscp_client_t *pClient ) |
744 |
{ |
745 |
int iChannels = -1; |
746 |
|
747 |
// Lock this section up. |
748 |
lscp_mutex_lock(pClient->mutex); |
749 |
|
750 |
if (lscp_client_call(pClient, "GET CHANNELS\r\n") == LSCP_OK) |
751 |
iChannels = atoi(lscp_client_get_result(pClient)); |
752 |
|
753 |
// Unlock this section doen. |
754 |
lscp_mutex_unlock(pClient->mutex); |
755 |
|
756 |
return iChannels; |
757 |
} |
758 |
|
759 |
|
760 |
/** |
761 |
* List current sampler channels number identifiers: |
762 |
* LIST CHANNELS |
763 |
* |
764 |
* @param pClient Pointer to client instance structure. |
765 |
* |
766 |
* @returns An array of the sampler channels identifiers as positive integers, |
767 |
* terminated with -1 on success, NULL otherwise. |
768 |
*/ |
769 |
int *lscp_list_channels ( lscp_client_t *pClient ) |
770 |
{ |
771 |
const char *pszSeps = ","; |
772 |
|
773 |
if (pClient == NULL) |
774 |
return NULL; |
775 |
|
776 |
// Lock this section up. |
777 |
lscp_mutex_lock(pClient->mutex); |
778 |
|
779 |
if (pClient->channels) { |
780 |
lscp_isplit_destroy(pClient->channels); |
781 |
pClient->channels = NULL; |
782 |
} |
783 |
|
784 |
if (lscp_client_call(pClient, "LIST CHANNELS\r\n") == LSCP_OK) |
785 |
pClient->channels = lscp_isplit_create(lscp_client_get_result(pClient), pszSeps); |
786 |
|
787 |
// Unlock this section down. |
788 |
lscp_mutex_unlock(pClient->mutex); |
789 |
|
790 |
return pClient->channels; |
791 |
} |
792 |
|
793 |
|
794 |
/** |
795 |
* Adding a new sampler channel: |
796 |
* ADD CHANNEL |
797 |
* |
798 |
* @param pClient Pointer to client instance structure. |
799 |
* |
800 |
* @returns The new sampler channel number identifier, |
801 |
* or -1 in case of failure. |
802 |
*/ |
803 |
int lscp_add_channel ( lscp_client_t *pClient ) |
804 |
{ |
805 |
int iSamplerChannel = -1; |
806 |
|
807 |
// Lock this section up. |
808 |
lscp_mutex_lock(pClient->mutex); |
809 |
|
810 |
if (lscp_client_call(pClient, "ADD CHANNEL\r\n") == LSCP_OK) |
811 |
iSamplerChannel = atoi(lscp_client_get_result(pClient)); |
812 |
|
813 |
// Unlock this section down. |
814 |
lscp_mutex_unlock(pClient->mutex); |
815 |
|
816 |
return iSamplerChannel; |
817 |
} |
818 |
|
819 |
|
820 |
/** |
821 |
* Removing a sampler channel: |
822 |
* REMOVE CHANNEL <sampler-channel> |
823 |
* |
824 |
* @param pClient Pointer to client instance structure. |
825 |
* @param iSamplerChannel Sampler channel number. |
826 |
* |
827 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
828 |
*/ |
829 |
lscp_status_t lscp_remove_channel ( lscp_client_t *pClient, int iSamplerChannel ) |
830 |
{ |
831 |
char szQuery[LSCP_BUFSIZ]; |
832 |
|
833 |
if (iSamplerChannel < 0) |
834 |
return LSCP_FAILED; |
835 |
|
836 |
sprintf(szQuery, "REMOVE CHANNEL %d\r\n", iSamplerChannel); |
837 |
return lscp_client_query(pClient, szQuery); |
838 |
} |
839 |
|
840 |
|
841 |
/** |
842 |
* Getting all available engines count: |
843 |
* GET AVAILABLE_ENGINES |
844 |
* |
845 |
* @param pClient Pointer to client instance structure. |
846 |
* |
847 |
* @returns The current total number of sampler engines on success, |
848 |
* -1 otherwise. |
849 |
*/ |
850 |
int lscp_get_available_engines ( lscp_client_t *pClient ) |
851 |
{ |
852 |
int iAvailableEngines = -1; |
853 |
|
854 |
// Lock this section up. |
855 |
lscp_mutex_lock(pClient->mutex); |
856 |
|
857 |
if (lscp_client_call(pClient, "GET AVAILABLE_ENGINES\r\n") == LSCP_OK) |
858 |
iAvailableEngines = atoi(lscp_client_get_result(pClient)); |
859 |
|
860 |
// Unlock this section down. |
861 |
lscp_mutex_unlock(pClient->mutex); |
862 |
|
863 |
return iAvailableEngines; |
864 |
} |
865 |
|
866 |
|
867 |
/** |
868 |
* Getting all available engines: |
869 |
* LIST AVAILABLE_ENGINES |
870 |
* |
871 |
* @param pClient Pointer to client instance structure. |
872 |
* |
873 |
* @returns A NULL terminated array of engine name strings, |
874 |
* or NULL in case of failure. |
875 |
*/ |
876 |
const char **lscp_list_available_engines ( lscp_client_t *pClient ) |
877 |
{ |
878 |
const char *pszSeps = ","; |
879 |
|
880 |
// Lock this section up. |
881 |
lscp_mutex_lock(pClient->mutex); |
882 |
|
883 |
if (pClient->engines) { |
884 |
lscp_szsplit_destroy(pClient->engines); |
885 |
pClient->engines = NULL; |
886 |
} |
887 |
|
888 |
if (lscp_client_call(pClient, "LIST AVAILABLE_ENGINES\r\n") == LSCP_OK) |
889 |
pClient->engines = lscp_szsplit_create(lscp_client_get_result(pClient), pszSeps); |
890 |
|
891 |
// Unlock this section down. |
892 |
lscp_mutex_unlock(pClient->mutex); |
893 |
|
894 |
return (const char **) pClient->engines; |
895 |
} |
896 |
|
897 |
|
898 |
/** |
899 |
* Getting information about an engine. |
900 |
* GET ENGINE INFO <engine-name> |
901 |
* |
902 |
* @param pClient Pointer to client instance structure. |
903 |
* @param pszEngineName Engine name. |
904 |
* |
905 |
* @returns A pointer to a @ref lscp_engine_info_t structure, with all the |
906 |
* information of the given sampler engine, or NULL in case of failure. |
907 |
*/ |
908 |
lscp_engine_info_t *lscp_get_engine_info ( lscp_client_t *pClient, const char *pszEngineName ) |
909 |
{ |
910 |
lscp_engine_info_t *pEngineInfo; |
911 |
char szQuery[LSCP_BUFSIZ]; |
912 |
const char *pszResult; |
913 |
const char *pszSeps = ":"; |
914 |
const char *pszCrlf = "\r\n"; |
915 |
char *pszToken; |
916 |
char *pch; |
917 |
|
918 |
if (pszEngineName == NULL) |
919 |
return NULL; |
920 |
|
921 |
// Lock this section up. |
922 |
lscp_mutex_lock(pClient->mutex); |
923 |
|
924 |
pEngineInfo = &(pClient->engine_info); |
925 |
lscp_engine_info_reset(pEngineInfo); |
926 |
|
927 |
sprintf(szQuery, "GET ENGINE INFO %s\r\n", pszEngineName); |
928 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) { |
929 |
pszResult = lscp_client_get_result(pClient); |
930 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
931 |
while (pszToken) { |
932 |
if (strcasecmp(pszToken, "DESCRIPTION") == 0) { |
933 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
934 |
if (pszToken) |
935 |
lscp_unquote_dup(&(pEngineInfo->description), &pszToken); |
936 |
} |
937 |
else if (strcasecmp(pszToken, "VERSION") == 0) { |
938 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
939 |
if (pszToken) |
940 |
lscp_unquote_dup(&(pEngineInfo->version), &pszToken); |
941 |
} |
942 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
943 |
} |
944 |
} |
945 |
else pEngineInfo = NULL; |
946 |
|
947 |
// Unlock this section down. |
948 |
lscp_mutex_unlock(pClient->mutex); |
949 |
|
950 |
return pEngineInfo; |
951 |
} |
952 |
|
953 |
|
954 |
/** |
955 |
* Getting sampler channel informations: |
956 |
* GET CHANNEL INFO <sampler-channel> |
957 |
* |
958 |
* @param pClient Pointer to client instance structure. |
959 |
* @param iSamplerChannel Sampler channel number. |
960 |
* |
961 |
* @returns A pointer to a @ref lscp_channel_info_t structure, with all the |
962 |
* information of the given sampler channel, or NULL in case of failure. |
963 |
*/ |
964 |
lscp_channel_info_t *lscp_get_channel_info ( lscp_client_t *pClient, int iSamplerChannel ) |
965 |
{ |
966 |
lscp_channel_info_t *pChannelInfo; |
967 |
char szQuery[LSCP_BUFSIZ]; |
968 |
const char *pszResult; |
969 |
const char *pszSeps = ":"; |
970 |
const char *pszCrlf = "\r\n"; |
971 |
char *pszToken; |
972 |
char *pch; |
973 |
|
974 |
if (iSamplerChannel < 0) |
975 |
return NULL; |
976 |
|
977 |
// Lock this section up. |
978 |
lscp_mutex_lock(pClient->mutex); |
979 |
|
980 |
pChannelInfo = &(pClient->channel_info); |
981 |
lscp_channel_info_reset(pChannelInfo); |
982 |
|
983 |
sprintf(szQuery, "GET CHANNEL INFO %d\r\n", iSamplerChannel); |
984 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) { |
985 |
pszResult = lscp_client_get_result(pClient); |
986 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
987 |
while (pszToken) { |
988 |
if (strcasecmp(pszToken, "ENGINE_NAME") == 0) { |
989 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
990 |
if (pszToken) |
991 |
lscp_unquote_dup(&(pChannelInfo->engine_name), &pszToken); |
992 |
} |
993 |
else if (strcasecmp(pszToken, "AUDIO_OUTPUT_DEVICE") == 0) { |
994 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
995 |
if (pszToken) |
996 |
pChannelInfo->audio_device = atoi(lscp_ltrim(pszToken)); |
997 |
} |
998 |
else if (strcasecmp(pszToken, "AUDIO_OUTPUT_CHANNELS") == 0) { |
999 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1000 |
if (pszToken) |
1001 |
pChannelInfo->audio_channels = atoi(lscp_ltrim(pszToken)); |
1002 |
} |
1003 |
else if (strcasecmp(pszToken, "AUDIO_OUTPUT_ROUTING") == 0) { |
1004 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1005 |
if (pszToken) { |
1006 |
if (pChannelInfo->audio_routing) |
1007 |
lscp_szsplit_destroy(pChannelInfo->audio_routing); |
1008 |
pChannelInfo->audio_routing = lscp_szsplit_create(pszToken, ","); |
1009 |
} |
1010 |
} |
1011 |
else if (strcasecmp(pszToken, "INSTRUMENT_FILE") == 0) { |
1012 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1013 |
if (pszToken) |
1014 |
lscp_unquote_dup(&(pChannelInfo->instrument_file), &pszToken); |
1015 |
} |
1016 |
else if (strcasecmp(pszToken, "INSTRUMENT_NR") == 0) { |
1017 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1018 |
if (pszToken) |
1019 |
pChannelInfo->instrument_nr = atoi(lscp_ltrim(pszToken)); |
1020 |
} |
1021 |
else if (strcasecmp(pszToken, "INSTRUMENT_NAME") == 0) { |
1022 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1023 |
if (pszToken) |
1024 |
lscp_unquote_dup(&(pChannelInfo->instrument_name), &pszToken); |
1025 |
} |
1026 |
else if (strcasecmp(pszToken, "INSTRUMENT_STATUS") == 0) { |
1027 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1028 |
if (pszToken) |
1029 |
pChannelInfo->instrument_status = atoi(lscp_ltrim(pszToken)); |
1030 |
} |
1031 |
else if (strcasecmp(pszToken, "MIDI_INPUT_DEVICE") == 0) { |
1032 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1033 |
if (pszToken) |
1034 |
pChannelInfo->midi_device = atoi(lscp_ltrim(pszToken)); |
1035 |
} |
1036 |
else if (strcasecmp(pszToken, "MIDI_INPUT_PORT") == 0) { |
1037 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1038 |
if (pszToken) |
1039 |
pChannelInfo->midi_port = atoi(lscp_ltrim(pszToken)); |
1040 |
} |
1041 |
else if (strcasecmp(pszToken, "MIDI_INPUT_CHANNEL") == 0) { |
1042 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1043 |
if (pszToken) { |
1044 |
pszToken = lscp_ltrim(pszToken); |
1045 |
if (strcasecmp(pszToken, "ALL") == 0) |
1046 |
pChannelInfo->midi_channel = LSCP_MIDI_CHANNEL_ALL; |
1047 |
else |
1048 |
pChannelInfo->midi_channel = atoi(pszToken); |
1049 |
} |
1050 |
} |
1051 |
else if (strcasecmp(pszToken, "VOLUME") == 0) { |
1052 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1053 |
if (pszToken) |
1054 |
pChannelInfo->volume = (float) atof(lscp_ltrim(pszToken)); |
1055 |
} |
1056 |
else if (strcasecmp(pszToken, "MUTE") == 0) { |
1057 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1058 |
if (pszToken) |
1059 |
pChannelInfo->mute = (strcasecmp(lscp_unquote(&pszToken, 0), "TRUE") == 0); |
1060 |
} |
1061 |
else if (strcasecmp(pszToken, "SOLO") == 0) { |
1062 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1063 |
if (pszToken) |
1064 |
pChannelInfo->solo = (strcasecmp(lscp_unquote(&pszToken, 0), "TRUE") == 0); |
1065 |
} |
1066 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
1067 |
} |
1068 |
} |
1069 |
else pChannelInfo = NULL; |
1070 |
|
1071 |
// Unlock this section up. |
1072 |
lscp_mutex_unlock(pClient->mutex); |
1073 |
|
1074 |
return pChannelInfo; |
1075 |
} |
1076 |
|
1077 |
|
1078 |
/** |
1079 |
* Current number of active voices: |
1080 |
* GET CHANNEL VOICE_COUNT <sampler-channel> |
1081 |
* |
1082 |
* @param pClient Pointer to client instance structure. |
1083 |
* @param iSamplerChannel Sampler channel number. |
1084 |
* |
1085 |
* @returns The number of voices currently active, -1 in case of failure. |
1086 |
*/ |
1087 |
int lscp_get_channel_voice_count ( lscp_client_t *pClient, int iSamplerChannel ) |
1088 |
{ |
1089 |
char szQuery[LSCP_BUFSIZ]; |
1090 |
int iVoiceCount = -1; |
1091 |
|
1092 |
if (iSamplerChannel < 0) |
1093 |
return iVoiceCount; |
1094 |
|
1095 |
// Lock this section up. |
1096 |
lscp_mutex_lock(pClient->mutex); |
1097 |
|
1098 |
sprintf(szQuery, "GET CHANNEL VOICE_COUNT %d\r\n", iSamplerChannel); |
1099 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) |
1100 |
iVoiceCount = atoi(lscp_client_get_result(pClient)); |
1101 |
|
1102 |
// Unlock this section down. |
1103 |
lscp_mutex_unlock(pClient->mutex); |
1104 |
|
1105 |
return iVoiceCount; |
1106 |
} |
1107 |
|
1108 |
|
1109 |
/** |
1110 |
* Current number of active disk streams: |
1111 |
* GET CHANNEL STREAM_COUNT <sampler-channel> |
1112 |
* |
1113 |
* @param pClient Pointer to client instance structure. |
1114 |
* @param iSamplerChannel Sampler channel number. |
1115 |
* |
1116 |
* @returns The number of active disk streams on success, -1 otherwise. |
1117 |
*/ |
1118 |
int lscp_get_channel_stream_count ( lscp_client_t *pClient, int iSamplerChannel ) |
1119 |
{ |
1120 |
char szQuery[LSCP_BUFSIZ]; |
1121 |
int iStreamCount = -1; |
1122 |
|
1123 |
if (iSamplerChannel < 0) |
1124 |
return iStreamCount; |
1125 |
|
1126 |
// Lock this section up. |
1127 |
lscp_mutex_lock(pClient->mutex); |
1128 |
|
1129 |
sprintf(szQuery, "GET CHANNEL STREAM_COUNT %d\r\n", iSamplerChannel); |
1130 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) |
1131 |
iStreamCount = atoi(lscp_client_get_result(pClient)); |
1132 |
|
1133 |
// Unlock this section down. |
1134 |
lscp_mutex_unlock(pClient->mutex); |
1135 |
|
1136 |
return iStreamCount; |
1137 |
} |
1138 |
|
1139 |
|
1140 |
/** |
1141 |
* Current least usage of active disk streams. |
1142 |
* |
1143 |
* @param pClient Pointer to client instance structure. |
1144 |
* @param iSamplerChannel Sampler channel number. |
1145 |
* |
1146 |
* @returns The usage percentage of the least filled active disk stream |
1147 |
* on success, -1 otherwise. |
1148 |
*/ |
1149 |
int lscp_get_channel_stream_usage ( lscp_client_t *pClient, int iSamplerChannel ) |
1150 |
{ |
1151 |
char szQuery[LSCP_BUFSIZ]; |
1152 |
int iStreamUsage = -1; |
1153 |
const char *pszResult; |
1154 |
const char *pszSeps = "[]%,"; |
1155 |
char *pszToken; |
1156 |
char *pch; |
1157 |
int iStream; |
1158 |
int iPercent; |
1159 |
|
1160 |
if (iSamplerChannel < 0) |
1161 |
return iStreamUsage; |
1162 |
|
1163 |
// Lock this section up. |
1164 |
lscp_mutex_lock(pClient->mutex); |
1165 |
|
1166 |
iStream = 0; |
1167 |
sprintf(szQuery, "GET CHANNEL BUFFER_FILL PERCENTAGE %d\r\n", iSamplerChannel); |
1168 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) { |
1169 |
pszResult = lscp_client_get_result(pClient); |
1170 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
1171 |
while (pszToken) { |
1172 |
if (*pszToken) { |
1173 |
// Skip stream id. |
1174 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
1175 |
if (pszToken == NULL) |
1176 |
break; |
1177 |
// Get least buffer fill percentage. |
1178 |
iPercent = atol(pszToken); |
1179 |
if (iStreamUsage > iPercent || iStream == 0) |
1180 |
iStreamUsage = iPercent; |
1181 |
iStream++; |
1182 |
} |
1183 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
1184 |
} |
1185 |
} |
1186 |
|
1187 |
// Unlock this section down. |
1188 |
lscp_mutex_unlock(pClient->mutex); |
1189 |
|
1190 |
return iStreamUsage; |
1191 |
} |
1192 |
|
1193 |
|
1194 |
/** |
1195 |
* Current fill state of disk stream buffers: |
1196 |
* GET CHANNEL BUFFER_FILL {BYTES|PERCENTAGE} <sampler-channel> |
1197 |
* |
1198 |
* @param pClient Pointer to client instance structure. |
1199 |
* @param usage_type Usage type to be returned, either |
1200 |
* @ref LSCP_USAGE_BYTES, or |
1201 |
* @ref LSCP_USAGE_PERCENTAGE. |
1202 |
* @param iSamplerChannel Sampler channel number. |
1203 |
* |
1204 |
* @returns A pointer to a @ref lscp_buffer_fill_t structure, with the |
1205 |
* information of the current disk stream buffer fill usage, for the given |
1206 |
* sampler channel, or NULL in case of failure. |
1207 |
*/ |
1208 |
lscp_buffer_fill_t *lscp_get_channel_buffer_fill ( lscp_client_t *pClient, lscp_usage_t usage_type, int iSamplerChannel ) |
1209 |
{ |
1210 |
lscp_buffer_fill_t *pBufferFill; |
1211 |
char szQuery[LSCP_BUFSIZ]; |
1212 |
int iStreamCount; |
1213 |
const char *pszUsageType = (usage_type == LSCP_USAGE_BYTES ? "BYTES" : "PERCENTAGE"); |
1214 |
const char *pszResult; |
1215 |
const char *pszSeps = "[]%,"; |
1216 |
char *pszToken; |
1217 |
char *pch; |
1218 |
int iStream; |
1219 |
|
1220 |
// Retrieve a channel stream estimation. |
1221 |
iStreamCount = lscp_get_channel_stream_count(pClient, iSamplerChannel); |
1222 |
if (pClient->iStreamCount < 0) |
1223 |
return NULL; |
1224 |
|
1225 |
// Lock this section up. |
1226 |
lscp_mutex_lock(pClient->mutex); |
1227 |
|
1228 |
// Check if we need to reallocate the stream usage array. |
1229 |
if (pClient->iStreamCount != iStreamCount) { |
1230 |
if (pClient->buffer_fill) |
1231 |
free(pClient->buffer_fill); |
1232 |
if (iStreamCount > 0) |
1233 |
pClient->buffer_fill = (lscp_buffer_fill_t *) malloc(iStreamCount * sizeof(lscp_buffer_fill_t)); |
1234 |
else |
1235 |
pClient->buffer_fill = NULL; |
1236 |
pClient->iStreamCount = iStreamCount; |
1237 |
} |
1238 |
|
1239 |
// Get buffer fill usage... |
1240 |
pBufferFill = pClient->buffer_fill; |
1241 |
if (pBufferFill && iStreamCount > 0) { |
1242 |
iStream = 0; |
1243 |
pBufferFill = pClient->buffer_fill; |
1244 |
sprintf(szQuery, "GET CHANNEL BUFFER_FILL %s %d\r\n", pszUsageType, iSamplerChannel); |
1245 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) { |
1246 |
pszResult = lscp_client_get_result(pClient); |
1247 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
1248 |
while (pszToken && iStream < pClient->iStreamCount) { |
1249 |
if (*pszToken) { |
1250 |
pBufferFill[iStream].stream_id = atol(pszToken); |
1251 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
1252 |
if (pszToken == NULL) |
1253 |
break; |
1254 |
pBufferFill[iStream].stream_usage = atol(pszToken); |
1255 |
iStream++; |
1256 |
} |
1257 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
1258 |
} |
1259 |
} // Reset the usage, whatever it was before. |
1260 |
else while (iStream < pClient->iStreamCount) |
1261 |
pBufferFill[iStream++].stream_usage = 0; |
1262 |
} |
1263 |
|
1264 |
// Unlock this section down. |
1265 |
lscp_mutex_unlock(pClient->mutex); |
1266 |
|
1267 |
return pBufferFill; |
1268 |
} |
1269 |
|
1270 |
|
1271 |
/** |
1272 |
* Setting audio output type: |
1273 |
* SET CHANNEL AUDIO_OUTPUT_TYPE <sampler-channel> <audio-output-type> |
1274 |
* |
1275 |
* @param pClient Pointer to client instance structure. |
1276 |
* @param iSamplerChannel Sampler channel number. |
1277 |
* @param pszAudioDriver Audio output driver type (e.g. "ALSA" or "JACK"). |
1278 |
*/ |
1279 |
lscp_status_t lscp_set_channel_audio_type ( lscp_client_t *pClient, int iSamplerChannel, const char *pszAudioDriver ) |
1280 |
{ |
1281 |
char szQuery[LSCP_BUFSIZ]; |
1282 |
|
1283 |
if (iSamplerChannel < 0 || pszAudioDriver == NULL) |
1284 |
return LSCP_FAILED; |
1285 |
|
1286 |
sprintf(szQuery, "SET CHANNEL AUDIO_OUTPUT_TYPE %d %s\r\n", iSamplerChannel, pszAudioDriver); |
1287 |
return lscp_client_query(pClient, szQuery); |
1288 |
} |
1289 |
|
1290 |
|
1291 |
/** |
1292 |
* Setting audio output device: |
1293 |
* SET CHANNEL AUDIO_OUTPUT_DEVICE <sampler-channel> <device-id> |
1294 |
* |
1295 |
* @param pClient Pointer to client instance structure. |
1296 |
* @param iSamplerChannel Sampler channel number. |
1297 |
* @param iAudioDevice Audio output device number identifier. |
1298 |
*/ |
1299 |
lscp_status_t lscp_set_channel_audio_device ( lscp_client_t *pClient, int iSamplerChannel, int iAudioDevice ) |
1300 |
{ |
1301 |
char szQuery[LSCP_BUFSIZ]; |
1302 |
|
1303 |
if (iSamplerChannel < 0 || iAudioDevice < 0) |
1304 |
return LSCP_FAILED; |
1305 |
|
1306 |
sprintf(szQuery, "SET CHANNEL AUDIO_OUTPUT_DEVICE %d %d\r\n", iSamplerChannel, iAudioDevice); |
1307 |
return lscp_client_query(pClient, szQuery); |
1308 |
} |
1309 |
|
1310 |
|
1311 |
/** |
1312 |
* Setting audio output channel: |
1313 |
* SET CHANNEL AUDIO_OUTPUT_CHANNEL <sampler-channel> <audio-output-chan> <audio-input-chan> |
1314 |
* |
1315 |
* @param pClient Pointer to client instance structure. |
1316 |
* @param iSamplerChannel Sampler channel number. |
1317 |
* @param iAudioOut Audio output device channel to be routed from. |
1318 |
* @param iAudioIn Audio output device channel to be routed into. |
1319 |
* |
1320 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1321 |
*/ |
1322 |
lscp_status_t lscp_set_channel_audio_channel ( lscp_client_t *pClient, int iSamplerChannel, int iAudioOut, int iAudioIn ) |
1323 |
{ |
1324 |
char szQuery[LSCP_BUFSIZ]; |
1325 |
|
1326 |
if (iSamplerChannel < 0 || iAudioOut < 0 || iAudioIn < 0) |
1327 |
return LSCP_FAILED; |
1328 |
|
1329 |
sprintf(szQuery, "SET CHANNEL AUDIO_OUTPUT_CHANNEL %d %d %d\r\n", iSamplerChannel, iAudioOut, iAudioIn); |
1330 |
return lscp_client_query(pClient, szQuery); |
1331 |
} |
1332 |
|
1333 |
|
1334 |
/** |
1335 |
* Setting MIDI input type: |
1336 |
* SET CHANNEL MIDI_INPUT_TYPE <sampler-channel> <midi-input-type> |
1337 |
* |
1338 |
* @param pClient Pointer to client instance structure. |
1339 |
* @param iSamplerChannel Sampler channel number. |
1340 |
* @param pszMidiDriver MIDI input driver type (e.g. "ALSA"). |
1341 |
* |
1342 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1343 |
*/ |
1344 |
lscp_status_t lscp_set_channel_midi_type ( lscp_client_t *pClient, int iSamplerChannel, const char *pszMidiDriver ) |
1345 |
{ |
1346 |
char szQuery[LSCP_BUFSIZ]; |
1347 |
|
1348 |
if (iSamplerChannel < 0 || pszMidiDriver == NULL) |
1349 |
return LSCP_FAILED; |
1350 |
|
1351 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_TYPE %d %s\r\n", iSamplerChannel, pszMidiDriver); |
1352 |
return lscp_client_query(pClient, szQuery); |
1353 |
} |
1354 |
|
1355 |
|
1356 |
/** |
1357 |
* Setting MIDI input device: |
1358 |
* SET CHANNEL MIDI_INPUT_DEVICE <sampler-channel> <device-id> |
1359 |
* |
1360 |
* @param pClient Pointer to client instance structure. |
1361 |
* @param iSamplerChannel Sampler channel number. |
1362 |
* @param iMidiDevice MIDI input device number identifier. |
1363 |
*/ |
1364 |
lscp_status_t lscp_set_channel_midi_device ( lscp_client_t *pClient, int iSamplerChannel, int iMidiDevice ) |
1365 |
{ |
1366 |
char szQuery[LSCP_BUFSIZ]; |
1367 |
|
1368 |
if (iSamplerChannel < 0 || iMidiDevice < 0) |
1369 |
return LSCP_FAILED; |
1370 |
|
1371 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_DEVICE %d %d\r\n", iSamplerChannel, iMidiDevice); |
1372 |
return lscp_client_query(pClient, szQuery); |
1373 |
} |
1374 |
|
1375 |
|
1376 |
/** |
1377 |
* Setting MIDI input port: |
1378 |
* SET CHANNEL MIDI_INPUT_PORT <sampler-channel> <midi-input-port> |
1379 |
* |
1380 |
* @param pClient Pointer to client instance structure. |
1381 |
* @param iSamplerChannel Sampler channel number. |
1382 |
* @param iMidiPort MIDI input driver virtual port number. |
1383 |
* |
1384 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1385 |
*/ |
1386 |
lscp_status_t lscp_set_channel_midi_port ( lscp_client_t *pClient, int iSamplerChannel, int iMidiPort ) |
1387 |
{ |
1388 |
char szQuery[LSCP_BUFSIZ]; |
1389 |
|
1390 |
if (iSamplerChannel < 0 || iMidiPort < 0) |
1391 |
return LSCP_FAILED; |
1392 |
|
1393 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_PORT %d %d\r\n", iSamplerChannel, iMidiPort); |
1394 |
return lscp_client_query(pClient, szQuery); |
1395 |
} |
1396 |
|
1397 |
|
1398 |
/** |
1399 |
* Setting MIDI input channel: |
1400 |
* SET CHANNEL MIDI_INPUT_CHANNEL <sampler-channel> <midi-input-chan> |
1401 |
* |
1402 |
* @param pClient Pointer to client instance structure. |
1403 |
* @param iSamplerChannel Sampler channel number. |
1404 |
* @param iMidiChannel MIDI channel address number to listen (0-15) or |
1405 |
* LSCP_MIDI_CHANNEL_ALL (16) to listen on all channels. |
1406 |
* |
1407 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1408 |
*/ |
1409 |
lscp_status_t lscp_set_channel_midi_channel ( lscp_client_t *pClient, int iSamplerChannel, int iMidiChannel ) |
1410 |
{ |
1411 |
char szQuery[LSCP_BUFSIZ]; |
1412 |
|
1413 |
if (iSamplerChannel < 0 || iMidiChannel < 0 || iMidiChannel > 16) |
1414 |
return LSCP_FAILED; |
1415 |
|
1416 |
if (iMidiChannel == LSCP_MIDI_CHANNEL_ALL) |
1417 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_CHANNEL %d ALL\r\n", iSamplerChannel); |
1418 |
else |
1419 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_CHANNEL %d %d\r\n", iSamplerChannel, iMidiChannel); |
1420 |
return lscp_client_query(pClient, szQuery); |
1421 |
} |
1422 |
|
1423 |
|
1424 |
/** |
1425 |
* Setting channel volume: |
1426 |
* SET CHANNEL VOLUME <sampler-channel> <volume> |
1427 |
* |
1428 |
* @param pClient Pointer to client instance structure. |
1429 |
* @param iSamplerChannel Sampler channel number. |
1430 |
* @param fVolume Sampler channel volume as a positive floating point |
1431 |
* number, where a value less than 1.0 for attenuation, |
1432 |
* and greater than 1.0 for amplification. |
1433 |
* |
1434 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1435 |
*/ |
1436 |
lscp_status_t lscp_set_channel_volume ( lscp_client_t *pClient, int iSamplerChannel, float fVolume ) |
1437 |
{ |
1438 |
char szQuery[LSCP_BUFSIZ]; |
1439 |
|
1440 |
if (iSamplerChannel < 0 || fVolume < 0.0) |
1441 |
return LSCP_FAILED; |
1442 |
|
1443 |
sprintf(szQuery, "SET CHANNEL VOLUME %d %g\r\n", iSamplerChannel, fVolume); |
1444 |
return lscp_client_query(pClient, szQuery); |
1445 |
} |
1446 |
|
1447 |
|
1448 |
/** |
1449 |
* Muting a sampler channel: |
1450 |
* SET CHANNEL MUTE <sampler-channel> <mute> |
1451 |
* |
1452 |
* @param pClient Pointer to client instance structure. |
1453 |
* @param iSamplerChannel Sampler channel number. |
1454 |
* @param iMute Sampler channel mute state as a boolean value, |
1455 |
* either 1 (one) to mute the channel or 0 (zero) |
1456 |
* to unmute the channel. |
1457 |
* |
1458 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1459 |
*/ |
1460 |
lscp_status_t lscp_set_channel_mute ( lscp_client_t *pClient, int iSamplerChannel, int iMute ) |
1461 |
{ |
1462 |
char szQuery[LSCP_BUFSIZ]; |
1463 |
|
1464 |
if (iSamplerChannel < 0 || iMute < 0 || iMute > 1) |
1465 |
return LSCP_FAILED; |
1466 |
|
1467 |
sprintf(szQuery, "SET CHANNEL MUTE %d %d\r\n", iSamplerChannel, iMute); |
1468 |
return lscp_client_query(pClient, szQuery); |
1469 |
} |
1470 |
|
1471 |
|
1472 |
/** |
1473 |
* Soloing a sampler channel: |
1474 |
* SET CHANNEL SOLO <sampler-channel> <solo> |
1475 |
* |
1476 |
* @param pClient Pointer to client instance structure. |
1477 |
* @param iSamplerChannel Sampler channel number. |
1478 |
* @param iSolo Sampler channel solo state as a boolean value, |
1479 |
* either 1 (one) to solo the channel or 0 (zero) |
1480 |
* to unsolo the channel. |
1481 |
* |
1482 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1483 |
*/ |
1484 |
lscp_status_t lscp_set_channel_solo ( lscp_client_t *pClient, int iSamplerChannel, int iSolo ) |
1485 |
{ |
1486 |
char szQuery[LSCP_BUFSIZ]; |
1487 |
|
1488 |
if (iSamplerChannel < 0 || iSolo < 0 || iSolo > 1) |
1489 |
return LSCP_FAILED; |
1490 |
|
1491 |
sprintf(szQuery, "SET CHANNEL SOLO %d %d\r\n", iSamplerChannel, iSolo); |
1492 |
return lscp_client_query(pClient, szQuery); |
1493 |
} |
1494 |
|
1495 |
|
1496 |
/** |
1497 |
* Resetting a sampler channel: |
1498 |
* RESET CHANNEL <sampler-channel> |
1499 |
* |
1500 |
* @param pClient Pointer to client instance structure. |
1501 |
* @param iSamplerChannel Sampler channel number. |
1502 |
* |
1503 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1504 |
*/ |
1505 |
lscp_status_t lscp_reset_channel ( lscp_client_t *pClient, int iSamplerChannel ) |
1506 |
{ |
1507 |
char szQuery[LSCP_BUFSIZ]; |
1508 |
|
1509 |
if (iSamplerChannel < 0) |
1510 |
return LSCP_FAILED; |
1511 |
|
1512 |
sprintf(szQuery, "RESET CHANNEL %d\r\n", iSamplerChannel); |
1513 |
return lscp_client_query(pClient, szQuery); |
1514 |
} |
1515 |
|
1516 |
|
1517 |
/** |
1518 |
* Resetting the sampler: |
1519 |
* RESET |
1520 |
* |
1521 |
* @param pClient Pointer to client instance structure. |
1522 |
* |
1523 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1524 |
*/ |
1525 |
lscp_status_t lscp_reset_sampler ( lscp_client_t *pClient ) |
1526 |
{ |
1527 |
return lscp_client_query(pClient, "RESET\r\n"); |
1528 |
} |
1529 |
|
1530 |
|
1531 |
/** |
1532 |
* Getting information about the server. |
1533 |
* GET SERVER INFO |
1534 |
* |
1535 |
* @param pClient Pointer to client instance structure. |
1536 |
* |
1537 |
* @returns A pointer to a @ref lscp_server_info_t structure, with all the |
1538 |
* information of the current connected server, or NULL in case of failure. |
1539 |
*/ |
1540 |
lscp_server_info_t *lscp_get_server_info ( lscp_client_t *pClient ) |
1541 |
{ |
1542 |
lscp_server_info_t *pServerInfo; |
1543 |
const char *pszResult; |
1544 |
const char *pszSeps = ":"; |
1545 |
const char *pszCrlf = "\r\n"; |
1546 |
char *pszToken; |
1547 |
char *pch; |
1548 |
|
1549 |
// Lock this section up. |
1550 |
lscp_mutex_lock(pClient->mutex); |
1551 |
|
1552 |
pServerInfo = &(pClient->server_info); |
1553 |
lscp_server_info_reset(pServerInfo); |
1554 |
|
1555 |
if (lscp_client_call(pClient, "GET SERVER INFO\r\n") == LSCP_OK) { |
1556 |
pszResult = lscp_client_get_result(pClient); |
1557 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
1558 |
while (pszToken) { |
1559 |
if (strcasecmp(pszToken, "DESCRIPTION") == 0) { |
1560 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1561 |
if (pszToken) |
1562 |
lscp_unquote_dup(&(pServerInfo->description), &pszToken); |
1563 |
} |
1564 |
else if (strcasecmp(pszToken, "VERSION") == 0) { |
1565 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
1566 |
if (pszToken) |
1567 |
lscp_unquote_dup(&(pServerInfo->version), &pszToken); |
1568 |
} |
1569 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
1570 |
} |
1571 |
} |
1572 |
else pServerInfo = NULL; |
1573 |
|
1574 |
// Unlock this section down. |
1575 |
lscp_mutex_unlock(pClient->mutex); |
1576 |
|
1577 |
return pServerInfo; |
1578 |
} |
1579 |
|
1580 |
|
1581 |
// end of client.c |