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// example_server.c |
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// |
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/**************************************************************************** |
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Copyright (C) 2004, rncbc aka Rui Nuno Capela. All rights reserved. |
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|
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2 |
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of the License, or (at your option) any later version. |
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|
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This program 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 |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; 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 "server.h" |
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#include "parser.h" |
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|
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#include <time.h> |
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|
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#define SERVER_PORT 8888 |
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|
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#if defined(WIN32) |
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static WSADATA _wsaData; |
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#endif |
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|
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//////////////////////////////////////////////////////////////////////// |
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|
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lscp_status_t server_callback ( lscp_connect_t *pConnect, const char *pchBuffer, int cchBuffer, void *pvData ) |
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{ |
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lscp_status_t ret = LSCP_OK; |
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lscp_parser_t tok; |
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const char *pszResult = NULL; |
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char szTemp[256]; |
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int i; |
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static int iChannel = 0; |
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|
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if (pchBuffer == NULL) { |
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fprintf(stderr, "server_callback: addr=%s port=%d: ", |
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inet_ntoa(pConnect->client.addr.sin_addr), |
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htons(pConnect->client.addr.sin_port)); |
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switch (cchBuffer) { |
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case LSCP_CONNECT_OPEN: |
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fprintf(stderr, "New client connection.\n"); |
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break; |
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case LSCP_CONNECT_CLOSE: |
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fprintf(stderr, "Connection closed.\n"); |
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break; |
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} |
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return ret; |
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} |
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|
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lscp_socket_trace("server_callback", &(pConnect->client.addr), pchBuffer, cchBuffer); |
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|
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lscp_parser_init(&tok, pchBuffer, cchBuffer); |
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|
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if (lscp_parser_test(&tok, "GET")) { |
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if (lscp_parser_test(&tok, "CHANNEL")) { |
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if (lscp_parser_test(&tok, "INFO")) { |
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// Getting sampler channel informations: |
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// GET CHANNEL INFO <sampler-channel> |
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pszResult = "ENGINE_NAME: DummyEngine\r\n" |
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"INSTRUMENT_FILE: DummyInstrument.gig\r\n" |
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"INSTRUMENT_NR: 0\r\n" |
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"AUDIO_OUTPUT_DEVICE: 0\r\n" |
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"AUDIO_OUTPUT_CHANNELS: 2\r\n" |
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"AUDIO_OUTPUT_ROUTING: 0,1\r\n" |
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"MIDI_INPUT_DEVICE: 0\r\n" |
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"MIDI_INPUT_PORT: 0\r\n" |
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"MIDI_INPUT_CHANNEL: ALL\r\n" |
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"VOLUME: 0.5\r\n"; |
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} |
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else if (lscp_parser_test(&tok, "VOICE_COUNT")) { |
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// Current number of active voices: |
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// GET CHANNEL VOICE_COUNT <sampler-channel> |
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sprintf(szTemp, "%d", rand() % 100); |
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pszResult = szTemp; |
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} |
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else if (lscp_parser_test(&tok, "STREAM_COUNT")) { |
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// Current number of active disk streams: |
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// GET CHANNEL STREAM_COUNT <sampler-channel> |
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pszResult = "3\r\n"; |
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} |
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else if (lscp_parser_test(&tok, "BUFFER_FILL")) { |
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if (lscp_parser_test(&tok, "BYTES")) { |
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// Current fill state of disk stream buffers: |
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// GET CHANNEL BUFFER_FILL BYTES <sampler-channel> |
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sprintf(szTemp, "[1]%d,[2]%d,[3]%d\r\n", rand(), rand(), rand()); |
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pszResult = szTemp; |
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} |
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else if (lscp_parser_test(&tok, "PERCENTAGE")) { |
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// Current fill state of disk stream buffers: |
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// GET CHANNEL BUFFER_FILL PERCENTAGE <sampler-channel> |
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sprintf(szTemp, "[1]%d%%,[2]%d%%,[3]%d%%\r\n", rand() % 100, rand() % 100, rand() % 100); |
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pszResult = szTemp; |
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} |
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else ret = LSCP_FAILED; |
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} |
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else ret = LSCP_FAILED; |
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} |
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else if (lscp_parser_test(&tok, "CHANNELS")) { |
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// Current number of sampler channels: |
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// GET CHANNELS |
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sprintf(szTemp, "%d", iChannel); |
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pszResult = szTemp; |
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} |
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else if (lscp_parser_test(&tok, "AVAILABLE_AUDIO_OUTPUT_DRIVERS")) { |
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// Getting all available audio output drivers. |
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// GET AVAILABLE_AUDIO_OUTPUT_DRIVERS |
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pszResult = "ALSA,JACK\r\n"; |
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} |
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else if (lscp_parser_test(&tok, "AVAILABLE_MIDI_INPUT_DRIVERS")) { |
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// Getting all available MIDI input drivers. |
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// GET AVAILABLE_MIDI_INPUT_DRIVERS |
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pszResult = "ALSA\r\n"; |
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} |
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else if (lscp_parser_test2(&tok, "AUDIO_OUTPUT_DRIVER", "INFO")) { |
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// Getting informations about a specific audio output driver. |
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// GET AUDIO_OUTPUT_DRIVER INFO <audio-output-type> |
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if (lscp_parser_test(&tok, "ALSA")) { |
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pszResult = "DESCRIPTION: 'ALSA PCM'\r\n" |
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"VERSION: '1.0'\r\n" |
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"PARAMETERS: CHANNELS,SAMPLERATE,ACTIVE,CARD\r\n"; |
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} |
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else if (lscp_parser_test(&tok, "JACK")) { |
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pszResult = "DESCRIPTION: Jack Audio Connection Kit\r\n" |
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"VERSION: 0.98.1\r\n" |
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"PARAMETERS: CHANNELS,SAMPLERATE,ACTIVE\r\n"; |
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} |
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else ret = LSCP_FAILED; |
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} |
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else if (lscp_parser_test2(&tok, "MIDI_INPUT_DRIVER", "INFO")) { |
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// Getting informations about a specific MIDI input driver. |
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// GET MIDI_INPUT_DRIVER INFO <midi-input-type> |
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if (lscp_parser_test(&tok, "ALSA")) { |
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pszResult = "DESCRIPTION: ALSA Sequencer\r\n" |
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"VERSION: 1.0\r\n" |
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"PARAMETERS: PORTS,ACTIVE\r\n"; |
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} |
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else ret = LSCP_FAILED; |
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} |
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else if (lscp_parser_test(&tok, "AVAILABLE_ENGINES")) { |
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// Getting all available engines: |
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// GET AVAILABLE_ENGINES |
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pszResult = "Engine1,Engine2,Engine3\r\n"; |
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} |
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else if (lscp_parser_test2(&tok, "ENGINE", "INFO")) { |
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// Getting information about an engine. |
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// GET ENGINE INFO <engine-name> |
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pszResult = "DESCRIPTION: DummyEngine\r\n" |
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"VERSION: 1.0\r\n"; |
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} |
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else ret = LSCP_FAILED; |
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} |
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else if (lscp_parser_test(&tok, "LIST")) { |
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if (lscp_parser_test(&tok, "CHANNELS")) { |
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// Getting all created sampler channel list. |
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// GET CHANNELS |
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if (iChannel > 0) { |
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strcpy(szTemp, "0"); |
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for (i = 1; i < iChannel; i++) |
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sprintf(szTemp + strlen(szTemp), ",%d", i); |
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strcat(szTemp, "\r\n"); |
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pszResult = szTemp; |
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} |
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else ret = LSCP_FAILED; |
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} |
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else if (lscp_parser_test(&tok, "AUDIO_OUTPUT_DEVICES")) { |
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// Getting all created audio output device list. |
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// GET AUDIO_OUTPUT_DEVICES |
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pszResult = "0,1\r\n"; |
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} |
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else if (lscp_parser_test(&tok, "MIDI_INPUT_DEVICES")) { |
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// Getting all created MID input device list. |
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// GET MIDI_INPUT_DEVICES |
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pszResult = "0\r\n"; |
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} |
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else ret = LSCP_FAILED; |
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} |
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else if (lscp_parser_test(&tok, "SET")) { |
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if (lscp_parser_test(&tok, "CHANNEL")) { |
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if (lscp_parser_test(&tok, "VOLUME")) { |
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// Setting channel volume: |
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// SET CHANNEL VOLUME <sampler-channel> <volume> |
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} |
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else if (lscp_parser_test(&tok, "AUDIO_OUTPUT_TYPE")) { |
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// Setting audio output type: |
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// SET CHANNEL AUDIO_OUTPUT_TYPE <sampler-channel> <audio-output-type> |
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} |
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else if (lscp_parser_test(&tok, "AUDIO_OUTPUT_DEVICE")) { |
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// Setting audio output device: |
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// SET CHANNEL AUDIO_OUTPUT_DEVICE <sampler-channel> <device-id> |
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} |
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else if (lscp_parser_test(&tok, "AUDIO_OUTPUT_CHANNEL")) { |
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// Setting audio output channel: |
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// SET CHANNEL AUDIO_OUTPUT_CHANNEL <sampler-channel> <audio-in> <audio-out> |
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} |
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else if (lscp_parser_test(&tok, "MIDI_INPUT_TYPE")) { |
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// Setting MIDI input type: |
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// SET CHANNEL MIDI_INPUT_TYPE <sampler-channel> <midi-input-type> |
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} |
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else if (lscp_parser_test(&tok, "MIDI_INPUT_DEVICE")) { |
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// Setting MIDI input device: |
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// SET CHANNEL MIDI_INPUT_DEVICE <sampler-channel> <device-id> |
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} |
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else if (lscp_parser_test(&tok, "MIDI_INPUT_PORT")) { |
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// Setting MIDI input port: |
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// SET CHANNEL MIDI_INPUT_PORT <sampler-channel> <midi-input-port> |
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} |
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else if (lscp_parser_test(&tok, "MIDI_INPUT_CHANNEL")) { |
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// Setting MIDI input channel: |
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// SET CHANNEL MIDI_INPUT_CHANNEL <sampler-channel> <midi-input-chan> |
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} |
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else ret = LSCP_FAILED; |
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} |
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else ret = LSCP_FAILED; |
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} |
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else if (lscp_parser_test(&tok, "LOAD")) { |
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if (lscp_parser_test(&tok, "ENGINE")) { |
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// Loading a sampler engine: |
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// LOAD ENGINE <engine-name> <sampler-channel> |
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} |
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else if (lscp_parser_test(&tok, "INSTRUMENT")) { |
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// Loading an instrument: |
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// LOAD INSTRUMENT <filename> <instr-index> <sampler-channel> |
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} |
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else ret = LSCP_FAILED; |
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} |
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else if (lscp_parser_test2(&tok, "ADD", "CHANNEL")) { |
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// Adding a new sampler channel: |
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// ADD CHANNEL |
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sprintf(szTemp, "OK[%d]", iChannel++); |
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pszResult = szTemp; |
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} |
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else if (lscp_parser_test2(&tok, "REMOVE", "CHANNEL")) { |
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// Removing a sampler channel: |
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// REMOVE CHANNEL <sampler-channel> |
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} |
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else if (lscp_parser_test2(&tok, "RESET", "CHANNEL")) { |
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// Resetting a sampler channel: |
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// RESET CHANNEL <sampler-channel> |
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} |
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else if (lscp_parser_test2(&tok, "SUBSCRIBE", "NOTIFICATION")) { |
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// Register frontend for receiving UDP event messages: |
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// SUBSCRIBE NOTIFICATION <udp-port> |
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ret = lscp_server_subscribe(pConnect, lscp_parser_nextint(&tok)); |
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} |
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else if (lscp_parser_test2(&tok, "UNSUBSCRIBE", "NOTIFICATION")) { |
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// Deregister frontend for not receiving UDP event messages anymore: |
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// UNSUBSCRIBE NOTIFICATION <session-id> |
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ret = lscp_server_unsubscribe(pConnect, lscp_parser_next(&tok)); |
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} |
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else if (lscp_parser_test(&tok, "QUIT")) { |
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// Close client connection: |
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// QUIT |
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lscp_parser_free(&tok); |
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return LSCP_FAILED; // Disconnect. |
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} |
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else ret = LSCP_FAILED; |
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|
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lscp_parser_free(&tok); |
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|
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if (pszResult == NULL) |
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pszResult = (ret == LSCP_OK ? "OK\r\n" : "ERR:1:Failed\r\n"); |
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|
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fprintf(stderr, "> %s", pszResult); |
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|
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return lscp_server_result(pConnect, pszResult, strlen(pszResult)); |
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} |
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|
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//////////////////////////////////////////////////////////////////////// |
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|
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void server_usage (void) |
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{ |
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printf("\n %s %s (Build: %s)\n", lscp_server_package(), lscp_server_version(), lscp_server_build()); |
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|
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fputs("\n Available server commands: help, exit, quit, list", stdout); |
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fputs("\n (all else are broadcast verbatim to subscribers)\n\n", stdout); |
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} |
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|
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void server_prompt (void) |
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{ |
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fputs("lscp_server> ", stdout); |
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} |
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|
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int main (int argc, char *argv[] ) |
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{ |
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lscp_server_t *pServer; |
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char szLine[200]; |
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int cchLine; |
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lscp_connect_t *p; |
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|
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#if defined(WIN32) |
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if (WSAStartup(MAKEWORD(1, 1), &_wsaData) != 0) { |
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fprintf(stderr, "lscp_server: WSAStartup failed.\n"); |
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return -1; |
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} |
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#endif |
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|
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srand(time(NULL)); |
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|
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pServer = lscp_server_create(SERVER_PORT, server_callback, NULL); |
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if (pServer == NULL) |
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return -1; |
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|
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server_usage(); |
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server_prompt(); |
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|
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while (fgets(szLine, sizeof(szLine), stdin)) { |
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|
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cchLine = strlen(szLine); |
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while (cchLine > 0 && (szLine[cchLine - 1] == '\n' || szLine[cchLine - 1] == '\r')) |
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cchLine--; |
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szLine[cchLine] = '\0'; |
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|
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if (strcmp(szLine, "exit") == 0 || strcmp(szLine, "quit") == 0) |
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break; |
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else |
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if (strcmp(szLine, "list") == 0) { |
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for (p = pServer->connects.first; p; p = p->next) { |
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printf("client: sock=%d addr=%s tcp.port=%d udp.port=%d ping=%d sessid=%s.\n", |
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p->client.sock, |
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inet_ntoa(p->client.addr.sin_addr), |
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ntohs(p->client.addr.sin_port), |
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p->port, |
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p->ping, |
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p->sessid |
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); |
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} |
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} |
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else |
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if (cchLine > 0 && strcmp(szLine, "help") != 0) |
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lscp_server_broadcast(pServer, szLine, strlen(szLine)); |
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else |
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server_usage(); |
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|
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server_prompt(); |
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} |
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|
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lscp_server_destroy(pServer); |
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|
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#if defined(WIN32) |
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WSACleanup(); |
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#endif |
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|
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return 0; |
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} |
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|
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// end of example_server.c |
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