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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, 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 have 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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|
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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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struct sockaddr_in addr; |
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int cAddr; |
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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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|
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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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cAddr = sizeof(struct sockaddr_in); |
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cchBuffer = recvfrom(pClient->evt.sock, achBuffer, sizeof(achBuffer), 0, (struct sockaddr *) &addr, &cAddr); |
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if (cchBuffer > 0) { |
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#ifdef DEBUG |
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lscp_socket_trace("_lscp_client_evt_proc: recvfrom", &addr, achBuffer, cchBuffer); |
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#endif |
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if (strncasecmp(achBuffer, "PING ", 5) == 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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lscp_strtok(achBuffer, pszSeps, &(pch)); // Skip "PING" |
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lscp_strtok(NULL, pszSeps, &(pch)); // Skip port (must be the same as in addr) |
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pszToken = lscp_strtok(NULL, pszSeps, &(pch)); // Have session-id. |
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if (pszToken) { |
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// Set now client's session-id, if not already |
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if (pClient->sessid == NULL) |
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pClient->sessid = strdup(pszToken); |
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if (pClient->sessid && strcmp(pszToken, pClient->sessid) == 0) { |
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sprintf(achBuffer, "PONG %s\r\n", pClient->sessid); |
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cchBuffer = strlen(achBuffer); |
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if (sendto(pClient->evt.sock, achBuffer, cchBuffer, 0, (struct sockaddr *) &addr, cAddr) < cchBuffer) |
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lscp_socket_perror("_lscp_client_evt_proc: sendto"); |
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#ifdef DEBUG |
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fprintf(stderr, "> %s", achBuffer); |
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#endif |
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} |
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} |
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// Done with life proof. |
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} else { |
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// |
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if ((*pClient->pfnCallback)( |
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pClient, |
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achBuffer, |
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cchBuffer, |
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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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} else { |
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lscp_socket_perror("_lscp_client_evt_proc: recvfrom"); |
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pClient->evt.iState = 0; |
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} |
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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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// 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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int iSockOpt = (-1); |
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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); |
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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 |
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|
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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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lscp_socket_agent_init(&(pClient->cmd), sock, &addr, cAddr); |
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|
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#ifdef DEBUG |
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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)); |
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#endif |
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|
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// Prepare the event datagram service socket... |
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|
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sock = socket(AF_INET, SOCK_DGRAM, 0); |
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if (sock == INVALID_SOCKET) { |
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lscp_socket_perror("lscp_client_create: evt: socket"); |
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lscp_socket_agent_free(&(pClient->cmd)); |
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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 (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &iSockOpt, sizeof(int)) == SOCKET_ERROR) |
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lscp_socket_perror("lscp_client_create: evt: setsockopt(SO_REUSEADDR)"); |
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|
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#ifdef DEBUG |
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lscp_socket_getopts("lscp_client_create: evt", sock); |
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#endif |
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|
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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 = AF_INET; |
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addr.sin_addr.s_addr = htonl(INADDR_ANY); |
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addr.sin_port = htons(0); |
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|
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if (bind(sock, (const struct sockaddr *) &addr, cAddr) == SOCKET_ERROR) { |
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lscp_socket_perror("lscp_client_create: evt: bind"); |
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lscp_socket_agent_free(&(pClient->cmd)); |
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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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if (getsockname(sock, (struct sockaddr *) &addr, &cAddr) == SOCKET_ERROR) { |
238 |
lscp_socket_perror("lscp_client_create: evt: getsockname"); |
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lscp_socket_agent_free(&(pClient->cmd)); |
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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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lscp_socket_agent_init(&(pClient->evt), sock, &addr, cAddr); |
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|
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#ifdef DEBUG |
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fprintf(stderr, "lscp_client_create: evt: pClient=%p: sock=%d addr=%s port=%d.\n", pClient, pClient->evt.sock, inet_ntoa(pClient->evt.addr.sin_addr), ntohs(pClient->evt.addr.sin_port)); |
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#endif |
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|
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// No session id, yet. |
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pClient->sessid = NULL; |
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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_info)); |
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lscp_driver_info_init(&(pClient->midi_info)); |
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lscp_engine_info_init(&(pClient->engine_info)); |
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lscp_channel_info_init(&(pClient->channel_info)); |
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// Initialize error stuff. |
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pClient->pszResult = NULL; |
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pClient->iErrno = -1; |
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// Stream usage stuff. |
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pClient->buffer_fill = NULL; |
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pClient->iStreamCount = 0; |
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// Default timeout value. |
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pClient->iTimeout = LSCP_TIMEOUT_MSECS; |
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|
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// Initialize the transaction mutex. |
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lscp_mutex_init(pClient->mutex); |
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|
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// Now's finally time to startup threads... |
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// Event service thread... |
278 |
if (lscp_socket_agent_start(&(pClient->evt), _lscp_client_evt_proc, pClient, 0) != LSCP_OK) { |
279 |
lscp_socket_agent_free(&(pClient->cmd)); |
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lscp_socket_agent_free(&(pClient->evt)); |
281 |
lscp_mutex_destroy(pClient->mutex); |
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free(pClient); |
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return NULL; |
284 |
} |
285 |
|
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// Finally we've some success... |
287 |
return pClient; |
288 |
} |
289 |
|
290 |
|
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/** |
292 |
* Wait for a client instance to terminate graciously. |
293 |
* |
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* @param pClient Pointer to client instance structure. |
295 |
*/ |
296 |
lscp_status_t lscp_client_join ( lscp_client_t *pClient ) |
297 |
{ |
298 |
if (pClient == NULL) |
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return LSCP_FAILED; |
300 |
|
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#ifdef DEBUG |
302 |
fprintf(stderr, "lscp_client_join: pClient=%p.\n", pClient); |
303 |
#endif |
304 |
|
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// lscp_socket_agent_join(&(pClient->evt)); |
306 |
lscp_socket_agent_join(&(pClient->cmd)); |
307 |
|
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return LSCP_OK; |
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} |
310 |
|
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|
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/** |
313 |
* Terminate and destroy a client instance. |
314 |
* |
315 |
* @param pClient Pointer to client instance structure. |
316 |
* |
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* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
318 |
*/ |
319 |
lscp_status_t lscp_client_destroy ( lscp_client_t *pClient ) |
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{ |
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if (pClient == NULL) |
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return LSCP_FAILED; |
323 |
|
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#ifdef DEBUG |
325 |
fprintf(stderr, "lscp_client_destroy: pClient=%p.\n", pClient); |
326 |
#endif |
327 |
|
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// Lock this section up. |
329 |
lscp_mutex_lock(pClient->mutex); |
330 |
|
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// Free session-id, if any. |
332 |
if (pClient->sessid) |
333 |
free(pClient->sessid); |
334 |
pClient->sessid = NULL; |
335 |
// Free up all cached members. |
336 |
lscp_channel_info_reset(&(pClient->channel_info)); |
337 |
lscp_engine_info_reset(&(pClient->engine_info)); |
338 |
lscp_driver_info_reset(&(pClient->midi_info)); |
339 |
lscp_driver_info_reset(&(pClient->audio_info)); |
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// Free available engine table. |
341 |
lscp_szsplit_destroy(pClient->audio_drivers); |
342 |
lscp_szsplit_destroy(pClient->midi_drivers); |
343 |
lscp_isplit_destroy(pClient->audio_devices); |
344 |
lscp_isplit_destroy(pClient->midi_devices); |
345 |
lscp_szsplit_destroy(pClient->engines); |
346 |
lscp_isplit_destroy(pClient->channels); |
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// Make them null. |
348 |
pClient->audio_drivers = NULL; |
349 |
pClient->midi_drivers = NULL; |
350 |
pClient->engines = NULL; |
351 |
// Free result error stuff. |
352 |
lscp_client_set_result(pClient, NULL, 0); |
353 |
// Frre stream usage stuff. |
354 |
if (pClient->buffer_fill) |
355 |
free(pClient->buffer_fill); |
356 |
pClient->buffer_fill = NULL; |
357 |
pClient->iStreamCount = 0; |
358 |
pClient->iTimeout = 0; |
359 |
|
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// Free socket agents. |
361 |
lscp_socket_agent_free(&(pClient->evt)); |
362 |
lscp_socket_agent_free(&(pClient->cmd)); |
363 |
|
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// Last but not least, free good ol'transaction mutex. |
365 |
lscp_mutex_unlock(pClient->mutex); |
366 |
lscp_mutex_destroy(pClient->mutex); |
367 |
|
368 |
free(pClient); |
369 |
|
370 |
return LSCP_OK; |
371 |
} |
372 |
|
373 |
|
374 |
/** |
375 |
* Set the client transaction timeout interval. |
376 |
* |
377 |
* @param pClient Pointer to client instance structure. |
378 |
* @param iTimeout Transaction timeout in milliseconds. |
379 |
* |
380 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
381 |
*/ |
382 |
lscp_status_t lscp_client_set_timeout ( lscp_client_t *pClient, int iTimeout ) |
383 |
{ |
384 |
if (pClient == NULL) |
385 |
return LSCP_FAILED; |
386 |
if (iTimeout < 0) |
387 |
return LSCP_FAILED; |
388 |
|
389 |
pClient->iTimeout = iTimeout; |
390 |
return LSCP_OK; |
391 |
} |
392 |
|
393 |
|
394 |
/** |
395 |
* Get the client transaction timeout interval. |
396 |
* |
397 |
* @param pClient Pointer to client instance structure. |
398 |
* |
399 |
* @returns The current timeout value milliseconds, -1 in case of failure. |
400 |
*/ |
401 |
int lscp_client_get_timeout ( lscp_client_t *pClient ) |
402 |
{ |
403 |
if (pClient == NULL) |
404 |
return -1; |
405 |
|
406 |
return pClient->iTimeout; |
407 |
} |
408 |
|
409 |
|
410 |
//------------------------------------------------------------------------- |
411 |
// Client common protocol functions. |
412 |
|
413 |
/** |
414 |
* Submit a command query line string to the server. The query string |
415 |
* must be cr/lf and null terminated. Besides the return code, the |
416 |
* specific server response to the command request is made available |
417 |
* by the @ref lscp_client_get_result and @ref lscp_client_get_errno |
418 |
* function calls. |
419 |
* |
420 |
* @param pClient Pointer to client instance structure. |
421 |
* @param pszQuery Command request line to be sent to server, |
422 |
* must be cr/lf and null terminated. |
423 |
* |
424 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
425 |
*/ |
426 |
lscp_status_t lscp_client_query ( lscp_client_t *pClient, const char *pszQuery ) |
427 |
{ |
428 |
lscp_status_t ret; |
429 |
|
430 |
// Lock this section up. |
431 |
lscp_mutex_lock(pClient->mutex); |
432 |
|
433 |
// Just make the now guarded call. |
434 |
ret = lscp_client_call(pClient, pszQuery); |
435 |
|
436 |
// Unlock this section down. |
437 |
lscp_mutex_unlock(pClient->mutex); |
438 |
|
439 |
return ret; |
440 |
} |
441 |
|
442 |
/** |
443 |
* Get the last received result string. In case of error or warning, |
444 |
* this is the text of the error or warning message issued. |
445 |
* |
446 |
* @param pClient Pointer to client instance structure. |
447 |
* |
448 |
* @returns A pointer to the literal null-terminated result string as |
449 |
* of the last command request. |
450 |
*/ |
451 |
const char *lscp_client_get_result ( lscp_client_t *pClient ) |
452 |
{ |
453 |
if (pClient == NULL) |
454 |
return NULL; |
455 |
|
456 |
return pClient->pszResult; |
457 |
} |
458 |
|
459 |
|
460 |
/** |
461 |
* Get the last error/warning number received. |
462 |
* |
463 |
* @param pClient Pointer to client instance structure. |
464 |
* |
465 |
* @returns The numerical value of the last error or warning |
466 |
* response code received. |
467 |
*/ |
468 |
int lscp_client_get_errno ( lscp_client_t *pClient ) |
469 |
{ |
470 |
if (pClient == NULL) |
471 |
return -1; |
472 |
|
473 |
return pClient->iErrno; |
474 |
} |
475 |
|
476 |
|
477 |
//------------------------------------------------------------------------- |
478 |
// Client registration protocol functions. |
479 |
|
480 |
/** |
481 |
* Register frontend for receiving UDP event messages: |
482 |
* SUBSCRIBE NOTIFICATION <udp-port> |
483 |
* |
484 |
* @param pClient Pointer to client instance structure. |
485 |
* |
486 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
487 |
*/ |
488 |
lscp_status_t lscp_client_subscribe ( lscp_client_t *pClient ) |
489 |
{ |
490 |
lscp_status_t ret; |
491 |
char szQuery[LSCP_BUFSIZ]; |
492 |
const char *pszResult; |
493 |
const char *pszSeps = "[]"; |
494 |
char *pszToken; |
495 |
char *pch; |
496 |
|
497 |
if (pClient == NULL || pClient->sessid) |
498 |
return LSCP_FAILED; |
499 |
|
500 |
// Lock this section up. |
501 |
lscp_mutex_lock(pClient->mutex); |
502 |
|
503 |
sprintf(szQuery, "SUBSCRIBE NOTIFICATION %d\r\n", ntohs(pClient->evt.addr.sin_port)); |
504 |
ret = lscp_client_call(pClient, szQuery); |
505 |
if (ret == LSCP_OK) { |
506 |
pszResult = lscp_client_get_result(pClient); |
507 |
#ifdef DEBUG |
508 |
fprintf(stderr, "lscp_client_subscribe: %s\n", pszResult); |
509 |
#endif |
510 |
// Check for the session-id on "OK[sessid]" response. |
511 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
512 |
if (pszToken && strcasecmp(pszToken, "OK") == 0) { |
513 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
514 |
if (pszToken) |
515 |
pClient->sessid = strdup(pszToken); |
516 |
} |
517 |
} |
518 |
|
519 |
// Unlock this section down. |
520 |
lscp_mutex_unlock(pClient->mutex); |
521 |
|
522 |
return ret; |
523 |
} |
524 |
|
525 |
|
526 |
/** |
527 |
* Deregister frontend for not receiving UDP event messages anymore: |
528 |
* UNSUBSCRIBE NOTIFICATION <session-id> |
529 |
* |
530 |
* @param pClient Pointer to client instance structure. |
531 |
* |
532 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
533 |
*/ |
534 |
lscp_status_t lscp_client_unsubscribe ( lscp_client_t *pClient ) |
535 |
{ |
536 |
lscp_status_t ret; |
537 |
char szQuery[LSCP_BUFSIZ]; |
538 |
|
539 |
if (pClient == NULL) |
540 |
return LSCP_FAILED; |
541 |
if (pClient->sessid == NULL) |
542 |
return LSCP_FAILED; |
543 |
|
544 |
// Lock this section up. |
545 |
lscp_mutex_lock(pClient->mutex); |
546 |
|
547 |
sprintf(szQuery, "UNSUBSCRIBE NOTIFICATION %s\n\n", pClient->sessid); |
548 |
ret = lscp_client_call(pClient, szQuery); |
549 |
if (ret == LSCP_OK) { |
550 |
#ifdef DEBUG |
551 |
fprintf(stderr, "lscp_client_unsubscribe: %s\n", lscp_client_get_result(pClient)); |
552 |
#endif |
553 |
// Bail out session-id string. |
554 |
free(pClient->sessid); |
555 |
pClient->sessid = NULL; |
556 |
} |
557 |
|
558 |
// Unlock this section down. |
559 |
lscp_mutex_unlock(pClient->mutex); |
560 |
|
561 |
return ret; |
562 |
} |
563 |
|
564 |
|
565 |
//------------------------------------------------------------------------- |
566 |
// Client command protocol functions. |
567 |
|
568 |
/** |
569 |
* Loading an instrument: |
570 |
* LOAD INSTRUMENT <filename> <instr-index> <sampler-channel> |
571 |
* |
572 |
* @param pClient Pointer to client instance structure. |
573 |
* @param pszFileName Instrument file name. |
574 |
* @param iInstrIndex Instrument index number. |
575 |
* @param iSamplerChannel Sampler Channel. |
576 |
* |
577 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
578 |
*/ |
579 |
lscp_status_t lscp_load_instrument ( lscp_client_t *pClient, const char *pszFileName, int iInstrIndex, int iSamplerChannel ) |
580 |
{ |
581 |
char szQuery[LSCP_BUFSIZ]; |
582 |
|
583 |
if (pszFileName == NULL || iSamplerChannel < 0) |
584 |
return LSCP_FAILED; |
585 |
|
586 |
sprintf(szQuery, "LOAD INSTRUMENT %s %d %d\r\n", pszFileName, iInstrIndex, iSamplerChannel); |
587 |
return lscp_client_query(pClient, szQuery); |
588 |
} |
589 |
|
590 |
|
591 |
/** |
592 |
* Loading a sampler engine: |
593 |
* LOAD ENGINE <engine-name> <sampler-channel> |
594 |
* |
595 |
* @param pClient Pointer to client instance structure. |
596 |
* @param pszEngineName Engine name. |
597 |
* @param iSamplerChannel Sampler channel number. |
598 |
* |
599 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
600 |
*/ |
601 |
lscp_status_t lscp_load_engine ( lscp_client_t *pClient, const char *pszEngineName, int iSamplerChannel ) |
602 |
{ |
603 |
char szQuery[LSCP_BUFSIZ]; |
604 |
|
605 |
if (pszEngineName == NULL || iSamplerChannel < 0) |
606 |
return LSCP_FAILED; |
607 |
|
608 |
sprintf(szQuery, "LOAD ENGINE %s %d\r\n", pszEngineName, iSamplerChannel); |
609 |
return lscp_client_query(pClient, szQuery); |
610 |
} |
611 |
|
612 |
|
613 |
/** |
614 |
* Current number of sampler channels: |
615 |
* GET CHANNELS |
616 |
* |
617 |
* @param pClient Pointer to client instance structure. |
618 |
* |
619 |
* @returns The current total number of sampler channels on success, |
620 |
* -1 otherwise. |
621 |
*/ |
622 |
int lscp_get_channels ( lscp_client_t *pClient ) |
623 |
{ |
624 |
int iChannels = -1; |
625 |
|
626 |
// Lock this section up. |
627 |
lscp_mutex_lock(pClient->mutex); |
628 |
|
629 |
if (lscp_client_call(pClient, "GET CHANNELS\r\n") == LSCP_OK) |
630 |
iChannels = atoi(lscp_client_get_result(pClient)); |
631 |
|
632 |
// Unlock this section doen. |
633 |
lscp_mutex_unlock(pClient->mutex); |
634 |
|
635 |
return iChannels; |
636 |
} |
637 |
|
638 |
|
639 |
/** |
640 |
* List current sampler channels number identifiers: |
641 |
* LIST CHANNELS |
642 |
* |
643 |
* @param pClient Pointer to client instance structure. |
644 |
* |
645 |
* @returns An array of the sampler channels identifiers as positive integers, |
646 |
* terminated with -1 on success, NULL otherwise. |
647 |
*/ |
648 |
int *lscp_list_channels ( lscp_client_t *pClient ) |
649 |
{ |
650 |
const char *pszSeps = ","; |
651 |
|
652 |
if (pClient == NULL) |
653 |
return NULL; |
654 |
|
655 |
// Lock this section up. |
656 |
lscp_mutex_lock(pClient->mutex); |
657 |
|
658 |
if (pClient->channels) { |
659 |
lscp_isplit_destroy(pClient->channels); |
660 |
pClient->channels = NULL; |
661 |
} |
662 |
|
663 |
if (lscp_client_call(pClient, "LIST CHANNELS\r\n") == LSCP_OK) |
664 |
pClient->channels = lscp_isplit_create(lscp_client_get_result(pClient), pszSeps); |
665 |
|
666 |
// Unlock this section down. |
667 |
lscp_mutex_unlock(pClient->mutex); |
668 |
|
669 |
return pClient->channels; |
670 |
} |
671 |
|
672 |
|
673 |
/** |
674 |
* Adding a new sampler channel: |
675 |
* ADD CHANNEL |
676 |
* |
677 |
* @param pClient Pointer to client instance structure. |
678 |
* |
679 |
* @returns The new sampler channel number identifier, |
680 |
* or -1 in case of failure. |
681 |
*/ |
682 |
int lscp_add_channel ( lscp_client_t *pClient ) |
683 |
{ |
684 |
int iSamplerChannel = -1; |
685 |
|
686 |
// Lock this section up. |
687 |
lscp_mutex_lock(pClient->mutex); |
688 |
|
689 |
if (lscp_client_call(pClient, "ADD CHANNEL\r\n") == LSCP_OK) |
690 |
iSamplerChannel = atoi(lscp_client_get_result(pClient)); |
691 |
|
692 |
// Unlock this section down. |
693 |
lscp_mutex_unlock(pClient->mutex); |
694 |
|
695 |
return iSamplerChannel; |
696 |
} |
697 |
|
698 |
|
699 |
/** |
700 |
* Removing a sampler channel: |
701 |
* REMOVE CHANNEL <sampler-channel> |
702 |
* |
703 |
* @param pClient Pointer to client instance structure. |
704 |
* @param iSamplerChannel Sampler channel number. |
705 |
* |
706 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
707 |
*/ |
708 |
lscp_status_t lscp_remove_channel ( lscp_client_t *pClient, int iSamplerChannel ) |
709 |
{ |
710 |
char szQuery[LSCP_BUFSIZ]; |
711 |
|
712 |
if (iSamplerChannel < 0) |
713 |
return LSCP_FAILED; |
714 |
|
715 |
sprintf(szQuery, "REMOVE CHANNEL %d\r\n", iSamplerChannel); |
716 |
return lscp_client_query(pClient, szQuery); |
717 |
} |
718 |
|
719 |
|
720 |
/** |
721 |
* Getting all available engines: |
722 |
* GET AVAILABLE_ENGINES |
723 |
* |
724 |
* @param pClient Pointer to client instance structure. |
725 |
* |
726 |
* @returns A NULL terminated array of engine name strings, |
727 |
* or NULL in case of failure. |
728 |
*/ |
729 |
const char **lscp_get_available_engines ( lscp_client_t *pClient ) |
730 |
{ |
731 |
const char *pszSeps = ","; |
732 |
|
733 |
// Lock this section up. |
734 |
lscp_mutex_lock(pClient->mutex); |
735 |
|
736 |
if (pClient->engines) { |
737 |
lscp_szsplit_destroy(pClient->engines); |
738 |
pClient->engines = NULL; |
739 |
} |
740 |
|
741 |
if (lscp_client_call(pClient, "GET AVAILABLE_ENGINES\r\n") == LSCP_OK) |
742 |
pClient->engines = lscp_szsplit_create(lscp_client_get_result(pClient), pszSeps); |
743 |
|
744 |
// Unlock this section down. |
745 |
lscp_mutex_unlock(pClient->mutex); |
746 |
|
747 |
return (const char **) pClient->engines; |
748 |
} |
749 |
|
750 |
|
751 |
/** |
752 |
* Getting information about an engine. |
753 |
* GET ENGINE INFO <engine-name> |
754 |
* |
755 |
* @param pClient Pointer to client instance structure. |
756 |
* @param pszEngineName Engine name. |
757 |
* |
758 |
* @returns A pointer to a @ref lscp_engine_info_t structure, with all the |
759 |
* information of the given sampler engine, or NULL in case of failure. |
760 |
*/ |
761 |
lscp_engine_info_t *lscp_get_engine_info ( lscp_client_t *pClient, const char *pszEngineName ) |
762 |
{ |
763 |
lscp_engine_info_t *pEngineInfo; |
764 |
char szQuery[LSCP_BUFSIZ]; |
765 |
const char *pszResult; |
766 |
const char *pszSeps = ":"; |
767 |
const char *pszCrlf = "\r\n"; |
768 |
char *pszToken; |
769 |
char *pch; |
770 |
|
771 |
if (pszEngineName == NULL) |
772 |
return NULL; |
773 |
|
774 |
// Lock this section up. |
775 |
lscp_mutex_lock(pClient->mutex); |
776 |
|
777 |
pEngineInfo = &(pClient->engine_info); |
778 |
lscp_engine_info_reset(pEngineInfo); |
779 |
|
780 |
sprintf(szQuery, "GET ENGINE INFO %s\r\n", pszEngineName); |
781 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) { |
782 |
pszResult = lscp_client_get_result(pClient); |
783 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
784 |
while (pszToken) { |
785 |
if (strcasecmp(pszToken, "DESCRIPTION") == 0) { |
786 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
787 |
if (pszToken) |
788 |
pEngineInfo->description = lscp_unquote(&pszToken, 1); |
789 |
} |
790 |
else if (strcasecmp(pszToken, "VERSION") == 0) { |
791 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
792 |
if (pszToken) |
793 |
pEngineInfo->version = lscp_unquote(&pszToken, 1); |
794 |
} |
795 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
796 |
} |
797 |
} |
798 |
else pEngineInfo = NULL; |
799 |
|
800 |
// Unlock this section down. |
801 |
lscp_mutex_unlock(pClient->mutex); |
802 |
|
803 |
return pEngineInfo; |
804 |
} |
805 |
|
806 |
|
807 |
/** |
808 |
* Getting sampler channel informations: |
809 |
* GET CHANNEL INFO <sampler-channel> |
810 |
* |
811 |
* @param pClient Pointer to client instance structure. |
812 |
* @param iSamplerChannel Sampler channel number. |
813 |
* |
814 |
* @returns A pointer to a @ref lscp_channel_info_t structure, with all the |
815 |
* information of the given sampler channel, or NULL in case of failure. |
816 |
*/ |
817 |
lscp_channel_info_t *lscp_get_channel_info ( lscp_client_t *pClient, int iSamplerChannel ) |
818 |
{ |
819 |
lscp_channel_info_t *pChannelInfo; |
820 |
char szQuery[LSCP_BUFSIZ]; |
821 |
const char *pszResult; |
822 |
const char *pszSeps = ":"; |
823 |
const char *pszCrlf = "\r\n"; |
824 |
char *pszToken; |
825 |
char *pch; |
826 |
|
827 |
if (iSamplerChannel < 0) |
828 |
return NULL; |
829 |
|
830 |
// Lock this section up. |
831 |
lscp_mutex_lock(pClient->mutex); |
832 |
|
833 |
pChannelInfo = &(pClient->channel_info); |
834 |
lscp_channel_info_reset(pChannelInfo); |
835 |
|
836 |
sprintf(szQuery, "GET CHANNEL INFO %d\r\n", iSamplerChannel); |
837 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) { |
838 |
pszResult = lscp_client_get_result(pClient); |
839 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
840 |
while (pszToken) { |
841 |
if (strcasecmp(pszToken, "ENGINE_NAME") == 0) { |
842 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
843 |
if (pszToken) |
844 |
pChannelInfo->engine_name = lscp_unquote(&pszToken, 1); |
845 |
} |
846 |
else if (strcasecmp(pszToken, "AUDIO_OUTPUT_DEVICE") == 0) { |
847 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
848 |
if (pszToken) |
849 |
pChannelInfo->audio_device = atoi(lscp_ltrim(pszToken)); |
850 |
} |
851 |
else if (strcasecmp(pszToken, "AUDIO_OUTPUT_CHANNELS") == 0) { |
852 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
853 |
if (pszToken) |
854 |
pChannelInfo->audio_channels = atoi(lscp_ltrim(pszToken)); |
855 |
} |
856 |
else if (strcasecmp(pszToken, "AUDIO_OUTPUT_ROUTING") == 0) { |
857 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
858 |
if (pszToken) |
859 |
pChannelInfo->audio_routing = lscp_szsplit_create(pszToken, ","); |
860 |
} |
861 |
else if (strcasecmp(pszToken, "INSTRUMENT_FILE") == 0) { |
862 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
863 |
if (pszToken) |
864 |
pChannelInfo->instrument_file = lscp_unquote(&pszToken, 1); |
865 |
} |
866 |
else if (strcasecmp(pszToken, "INSTRUMENT_NR") == 0) { |
867 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
868 |
if (pszToken) |
869 |
pChannelInfo->instrument_nr = atoi(lscp_ltrim(pszToken)); |
870 |
} |
871 |
else if (strcasecmp(pszToken, "INSTRUMENT_STATUS") == 0) { |
872 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
873 |
if (pszToken) |
874 |
pChannelInfo->instrument_status = atoi(lscp_ltrim(pszToken)); |
875 |
} |
876 |
else if (strcasecmp(pszToken, "MIDI_INPUT_DEVICE") == 0) { |
877 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
878 |
if (pszToken) |
879 |
pChannelInfo->midi_device = atoi(lscp_ltrim(pszToken)); |
880 |
} |
881 |
else if (strcasecmp(pszToken, "MIDI_INPUT_PORT") == 0) { |
882 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
883 |
if (pszToken) |
884 |
pChannelInfo->midi_port = atoi(lscp_ltrim(pszToken)); |
885 |
} |
886 |
else if (strcasecmp(pszToken, "MIDI_INPUT_CHANNEL") == 0) { |
887 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
888 |
if (pszToken) |
889 |
pChannelInfo->midi_channel = atoi(lscp_ltrim(pszToken)); |
890 |
} |
891 |
else if (strcasecmp(pszToken, "VOLUME") == 0) { |
892 |
pszToken = lscp_strtok(NULL, pszCrlf, &(pch)); |
893 |
if (pszToken) |
894 |
pChannelInfo->volume = (float) atof(lscp_ltrim(pszToken)); |
895 |
} |
896 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
897 |
} |
898 |
} |
899 |
else pChannelInfo = NULL; |
900 |
|
901 |
// Unlock this section up. |
902 |
lscp_mutex_unlock(pClient->mutex); |
903 |
|
904 |
return pChannelInfo; |
905 |
} |
906 |
|
907 |
|
908 |
/** |
909 |
* Current number of active voices: |
910 |
* GET CHANNEL VOICE_COUNT <sampler-channel> |
911 |
* |
912 |
* @param pClient Pointer to client instance structure. |
913 |
* @param iSamplerChannel Sampler channel number. |
914 |
* |
915 |
* @returns The number of voices currently active, -1 in case of failure. |
916 |
*/ |
917 |
int lscp_get_channel_voice_count ( lscp_client_t *pClient, int iSamplerChannel ) |
918 |
{ |
919 |
char szQuery[LSCP_BUFSIZ]; |
920 |
int iVoiceCount = -1; |
921 |
|
922 |
if (iSamplerChannel < 0) |
923 |
return iVoiceCount; |
924 |
|
925 |
// Lock this section up. |
926 |
lscp_mutex_lock(pClient->mutex); |
927 |
|
928 |
sprintf(szQuery, "GET CHANNEL VOICE_COUNT %d\r\n", iSamplerChannel); |
929 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) |
930 |
iVoiceCount = atoi(lscp_client_get_result(pClient)); |
931 |
|
932 |
// Unlock this section down. |
933 |
lscp_mutex_unlock(pClient->mutex); |
934 |
|
935 |
return iVoiceCount; |
936 |
} |
937 |
|
938 |
|
939 |
/** |
940 |
* Current number of active disk streams: |
941 |
* GET CHANNEL STREAM_COUNT <sampler-channel> |
942 |
* |
943 |
* @returns The number of active disk streams on success, -1 otherwise. |
944 |
*/ |
945 |
int lscp_get_channel_stream_count ( lscp_client_t *pClient, int iSamplerChannel ) |
946 |
{ |
947 |
char szQuery[LSCP_BUFSIZ]; |
948 |
int iStreamCount = -1; |
949 |
|
950 |
if (iSamplerChannel < 0) |
951 |
return iStreamCount; |
952 |
|
953 |
// Lock this section up. |
954 |
lscp_mutex_lock(pClient->mutex); |
955 |
|
956 |
sprintf(szQuery, "GET CHANNEL STREAM_COUNT %d\r\n", iSamplerChannel); |
957 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) |
958 |
iStreamCount = atoi(lscp_client_get_result(pClient)); |
959 |
|
960 |
// Unlock this section down. |
961 |
lscp_mutex_unlock(pClient->mutex); |
962 |
|
963 |
return iStreamCount; |
964 |
} |
965 |
|
966 |
|
967 |
/** |
968 |
* Current fill state of disk stream buffers: |
969 |
* GET CHANNEL BUFFER_FILL {BYTES|PERCENTAGE} <sampler-channel> |
970 |
* |
971 |
* @param pClient Pointer to client instance structure. |
972 |
* @param usage_type Usage type to be returned, either |
973 |
* @ref LSCP_USAGE_BYTES, or |
974 |
* @ref LSCP_USAGE_PERCENTAGE. |
975 |
* @param iSamplerChannel Sampler channel number. |
976 |
* |
977 |
* @returns A pointer to a @ref lscp_buffer_fill_t structure, with the |
978 |
* information of the current disk stream buffer fill usage, for the given |
979 |
* sampler channel, or NULL in case of failure. |
980 |
*/ |
981 |
lscp_buffer_fill_t *lscp_get_channel_buffer_fill ( lscp_client_t *pClient, lscp_usage_t usage_type, int iSamplerChannel ) |
982 |
{ |
983 |
lscp_buffer_fill_t *pBufferFill; |
984 |
char szQuery[LSCP_BUFSIZ]; |
985 |
int iStreamCount; |
986 |
const char *pszUsageType = (usage_type == LSCP_USAGE_BYTES ? "BYTES" : "PERCENTAGE"); |
987 |
const char *pszResult; |
988 |
const char *pszSeps = "[]%,"; |
989 |
char *pszToken; |
990 |
char *pch; |
991 |
int iStream; |
992 |
|
993 |
// Retrieve a channel stream estimation. |
994 |
iStreamCount = lscp_get_channel_stream_count(pClient, iSamplerChannel); |
995 |
if (pClient->iStreamCount < 0) |
996 |
return NULL; |
997 |
|
998 |
// Lock this section up. |
999 |
lscp_mutex_lock(pClient->mutex); |
1000 |
|
1001 |
// Check if we need to reallocate the stream usage array. |
1002 |
if (pClient->iStreamCount != iStreamCount) { |
1003 |
if (pClient->buffer_fill) |
1004 |
free(pClient->buffer_fill); |
1005 |
if (iStreamCount > 0) |
1006 |
pClient->buffer_fill = (lscp_buffer_fill_t *) malloc(iStreamCount * sizeof(lscp_buffer_fill_t)); |
1007 |
else |
1008 |
pClient->buffer_fill = NULL; |
1009 |
pClient->iStreamCount = iStreamCount; |
1010 |
} |
1011 |
|
1012 |
// Get buffer fill usage... |
1013 |
pBufferFill = pClient->buffer_fill; |
1014 |
if (pBufferFill && iStreamCount > 0) { |
1015 |
iStream = 0; |
1016 |
pBufferFill = pClient->buffer_fill; |
1017 |
sprintf(szQuery, "GET CHANNEL BUFFER_FILL %s %d\r\n", pszUsageType, iSamplerChannel); |
1018 |
if (lscp_client_call(pClient, szQuery) == LSCP_OK) { |
1019 |
pszResult = lscp_client_get_result(pClient); |
1020 |
pszToken = lscp_strtok((char *) pszResult, pszSeps, &(pch)); |
1021 |
while (pszToken && iStream < pClient->iStreamCount) { |
1022 |
if (*pszToken) { |
1023 |
pBufferFill[iStream].stream_id = atol(pszToken); |
1024 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
1025 |
if (pszToken == NULL) |
1026 |
break; |
1027 |
pBufferFill[iStream].stream_usage = atol(pszToken); |
1028 |
iStream++; |
1029 |
} |
1030 |
pszToken = lscp_strtok(NULL, pszSeps, &(pch)); |
1031 |
} |
1032 |
} // Reset the usage, whatever it was before. |
1033 |
else while (iStream < pClient->iStreamCount) |
1034 |
pBufferFill[iStream++].stream_usage = 0; |
1035 |
} |
1036 |
|
1037 |
// Unlock this section down. |
1038 |
lscp_mutex_unlock(pClient->mutex); |
1039 |
|
1040 |
return pBufferFill; |
1041 |
} |
1042 |
|
1043 |
|
1044 |
/** |
1045 |
* Setting audio output type: |
1046 |
* SET CHANNEL AUDIO_OUTPUT_TYPE <sampler-channel> <audio-output-type> |
1047 |
* |
1048 |
* @param pClient Pointer to client instance structure. |
1049 |
* @param iSamplerChannel Sampler channel number. |
1050 |
* @param pszAudioDriver Audio output driver type (e.g. "ALSA" or "JACK"). |
1051 |
*/ |
1052 |
lscp_status_t lscp_set_channel_audio_type ( lscp_client_t *pClient, int iSamplerChannel, const char *pszAudioDriver ) |
1053 |
{ |
1054 |
char szQuery[LSCP_BUFSIZ]; |
1055 |
|
1056 |
if (iSamplerChannel < 0 || pszAudioDriver == NULL) |
1057 |
return LSCP_FAILED; |
1058 |
|
1059 |
sprintf(szQuery, "SET CHANNEL AUDIO_OUTPUT_TYPE %d %s\r\n", iSamplerChannel, pszAudioDriver); |
1060 |
return lscp_client_query(pClient, szQuery); |
1061 |
} |
1062 |
|
1063 |
|
1064 |
/** |
1065 |
* Setting audio output channel: |
1066 |
* SET CHANNEL AUDIO_OUTPUT_CHANNEL <sampler-channel> <audio-output-chan> <audio-input-chan> |
1067 |
* |
1068 |
* @param pClient Pointer to client instance structure. |
1069 |
* @param iSamplerChannel Sampler channel number. |
1070 |
* @param iAudioOut Audio output device channel to be routed from. |
1071 |
* @param iAudioIn Audio output device channel to be routed into. |
1072 |
* |
1073 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1074 |
*/ |
1075 |
lscp_status_t lscp_set_channel_audio_channel ( lscp_client_t *pClient, int iSamplerChannel, int iAudioOut, int iAudioIn ) |
1076 |
{ |
1077 |
char szQuery[LSCP_BUFSIZ]; |
1078 |
|
1079 |
if (iSamplerChannel < 0 || iAudioOut < 0 || iAudioIn < 0) |
1080 |
return LSCP_FAILED; |
1081 |
|
1082 |
sprintf(szQuery, "SET CHANNEL AUDIO_OUTPUT_CHANNELS %d %d %d\r\n", iSamplerChannel, iAudioOut, iAudioIn); |
1083 |
return lscp_client_query(pClient, szQuery); |
1084 |
} |
1085 |
|
1086 |
|
1087 |
/** |
1088 |
* Setting MIDI input type: |
1089 |
* SET CHANNEL MIDI_INPUT_TYPE <sampler-channel> <midi-input-type> |
1090 |
* |
1091 |
* @param pClient Pointer to client instance structure. |
1092 |
* @param iSamplerChannel Sampler channel number. |
1093 |
* @param pszMidiDriver MIDI input driver type (e.g. "ALSA"). |
1094 |
* |
1095 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1096 |
*/ |
1097 |
lscp_status_t lscp_set_channel_midi_type ( lscp_client_t *pClient, int iSamplerChannel, const char *pszMidiDriver ) |
1098 |
{ |
1099 |
char szQuery[LSCP_BUFSIZ]; |
1100 |
|
1101 |
if (iSamplerChannel < 0 || pszMidiDriver == NULL) |
1102 |
return LSCP_FAILED; |
1103 |
|
1104 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_TYPE %d %s\r\n", iSamplerChannel, pszMidiDriver); |
1105 |
return lscp_client_query(pClient, szQuery); |
1106 |
} |
1107 |
|
1108 |
|
1109 |
/** |
1110 |
* Setting MIDI input port: |
1111 |
* SET CHANNEL MIDI_INPUT_PORT <sampler-channel> <midi-input-port> |
1112 |
* |
1113 |
* @param pClient Pointer to client instance structure. |
1114 |
* @param iSamplerChannel Sampler channel number. |
1115 |
* @param iMidiPort MIDI input driver virtual port number. |
1116 |
* |
1117 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1118 |
*/ |
1119 |
lscp_status_t lscp_set_channel_midi_port ( lscp_client_t *pClient, int iSamplerChannel, int iMidiPort ) |
1120 |
{ |
1121 |
char szQuery[LSCP_BUFSIZ]; |
1122 |
|
1123 |
if (iSamplerChannel < 0 || iMidiPort < 0) |
1124 |
return LSCP_FAILED; |
1125 |
|
1126 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_PORT %d %d\r\n", iSamplerChannel, iMidiPort); |
1127 |
return lscp_client_query(pClient, szQuery); |
1128 |
} |
1129 |
|
1130 |
|
1131 |
/** |
1132 |
* Setting MIDI input channel: |
1133 |
* SET CHANNEL MIDI_INPUT_CHANNEL <sampler-channel> <midi-input-chan> |
1134 |
* |
1135 |
* @param pClient Pointer to client instance structure. |
1136 |
* @param iSamplerChannel Sampler channel number. |
1137 |
* @param iMidiChannel MIDI channel number to listen (1-16) or |
1138 |
* zero (0) to listen on all channels. |
1139 |
* |
1140 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1141 |
*/ |
1142 |
lscp_status_t lscp_set_channel_midi_channel ( lscp_client_t *pClient, int iSamplerChannel, int iMidiChannel ) |
1143 |
{ |
1144 |
char szQuery[LSCP_BUFSIZ]; |
1145 |
|
1146 |
if (iSamplerChannel < 0 || iMidiChannel < 0 || iMidiChannel > 16) |
1147 |
return LSCP_FAILED; |
1148 |
|
1149 |
if (iMidiChannel > 0) |
1150 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_CHANNEL %d %d\r\n", iSamplerChannel, iMidiChannel); |
1151 |
else |
1152 |
sprintf(szQuery, "SET CHANNEL MIDI_INPUT_CHANNEL %d ALL\r\n", iSamplerChannel); |
1153 |
return lscp_client_query(pClient, szQuery); |
1154 |
} |
1155 |
|
1156 |
|
1157 |
/** |
1158 |
* Setting channel volume: |
1159 |
* SET CHANNEL VOLUME <sampler-channel> <volume> |
1160 |
* |
1161 |
* @param pClient Pointer to client instance structure. |
1162 |
* @param iSamplerChannel Sampler channel number. |
1163 |
* @param fVolume Sampler channel volume as a positive floating point |
1164 |
* number, where a value less than 1.0 for attenuation, |
1165 |
* and greater than 1.0 for amplification. |
1166 |
* |
1167 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1168 |
*/ |
1169 |
lscp_status_t lscp_set_channel_volume ( lscp_client_t *pClient, int iSamplerChannel, float fVolume ) |
1170 |
{ |
1171 |
char szQuery[LSCP_BUFSIZ]; |
1172 |
|
1173 |
if (iSamplerChannel < 0 || fVolume < 0.0) |
1174 |
return LSCP_FAILED; |
1175 |
|
1176 |
sprintf(szQuery, "SET CHANNEL VOLUME %d %g\r\n", iSamplerChannel, fVolume); |
1177 |
return lscp_client_query(pClient, szQuery); |
1178 |
} |
1179 |
|
1180 |
|
1181 |
/** |
1182 |
* Resetting a sampler channel: |
1183 |
* RESET CHANNEL <sampler-channel> |
1184 |
* |
1185 |
* @param pClient Pointer to client instance structure. |
1186 |
* @param iSamplerChannel Sampler channel number. |
1187 |
* |
1188 |
* @returns LSCP_OK on success, LSCP_FAILED otherwise. |
1189 |
*/ |
1190 |
lscp_status_t lscp_reset_channel ( lscp_client_t *pClient, int iSamplerChannel ) |
1191 |
{ |
1192 |
char szQuery[LSCP_BUFSIZ]; |
1193 |
|
1194 |
if (iSamplerChannel < 0) |
1195 |
return LSCP_FAILED; |
1196 |
|
1197 |
sprintf(szQuery, "RESET CHANNEL %d\r\n", iSamplerChannel); |
1198 |
return lscp_client_query(pClient, szQuery); |
1199 |
} |
1200 |
|
1201 |
|
1202 |
// end of client.c |