/[svn]/linuxsampler/trunk/src/linuxsampler.cpp
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Contents of /linuxsampler/trunk/src/linuxsampler.cpp

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Revision 35 - (show annotations) (download)
Fri Mar 5 13:46:15 2004 UTC (20 years ago) by schoenebeck
File size: 11053 byte(s)
* implemented parser for the LinuxSampler control protocol (LSCP) by using
  flex / bison (where src/network/lscp.l is the input file for lex / flex
  and src/network/lscp.y is the input file for yacc / bison), parser and
  scanner can be regenerated by 'make parser'
* implemented LSCP network server (only single threaded so far), LSCP
  server will be launched if LinuxSampler was started with "--server" flag,
  implemented the following LSCP commands so far: "LOAD INSTRUMENT", "GET
  CHANNEL VOICE_COUNT", "GET CHANNEL STREAM_COUNT", "GET CHANNEL
  BUFFER_FILL", "SET CHANNEL VOLUME" and "RESET CHANNEL"
* disk thread now started within the engine

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck *
6 * *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
11 * *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
16 * *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the Free Software *
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20 * MA 02111-1307 USA *
21 ***************************************************************************/
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <unistd.h>
26 #include <getopt.h>
27 #include <signal.h>
28 #include <pthread.h>
29
30 #include "global.h"
31 #include "diskthread.h"
32 #include "audiothread.h"
33 #include "alsaio.h"
34 #include "jackio.h"
35 #include "midiin.h"
36 #include "stream.h"
37 #include "RIFF.h"
38 #include "gig.h"
39 #include "network/lscpserver.h"
40
41 #define AUDIO_CHANNELS 2 // stereo
42 #define AUDIO_FRAGMENTS 3 // 3 fragments, if it does not work set it to 2
43 #define AUDIO_FRAGMENTSIZE 512 // each fragment has 512 frames
44 #define AUDIO_SAMPLERATE 44100 // Hz
45
46 enum patch_format_t {
47 patch_format_unknown,
48 patch_format_gig,
49 patch_format_dls
50 } patch_format = patch_format_unknown;
51
52 AudioIO* pAudioIO = NULL;
53 MidiIn* pMidiInThread = NULL;
54 LSCPServer* pLSCPServer = NULL;
55 AudioThread* pEngine = NULL;
56 uint instrument_index = 0;
57 double volume = 0.25;
58 int num_fragments = AUDIO_FRAGMENTS;
59 int fragmentsize = AUDIO_FRAGMENTSIZE;
60 uint samplerate = AUDIO_SAMPLERATE;
61 String input_client;
62 String alsaout = "0,0"; // default card
63 String jack_playback[2] = { "", "" };
64 bool use_jack = true;
65 bool run_server = false;
66 pthread_t signalhandlerthread;
67
68 void parse_options(int argc, char **argv);
69 void signal_handler(int signal);
70
71 int main(int argc, char **argv) {
72
73 // setting signal handler for catching SIGINT (thus e.g. <CTRL><C>)
74 signalhandlerthread = pthread_self();
75 signal(SIGINT, signal_handler);
76
77 // parse and assign command line options
78 parse_options(argc, argv);
79
80 if (patch_format != patch_format_gig) {
81 printf("Sorry only Gigasampler loading migrated in LinuxSampler so far, use --gig to load a .gig file!\n");
82 printf("Use 'linuxsampler --help' to see all available options.\n");
83 return EXIT_FAILURE;
84 }
85
86 int error = 1;
87 #if HAVE_JACK
88 if (use_jack) {
89 dmsg(1,("Initializing audio output (Jack)..."));
90 pAudioIO = new JackIO();
91 error = ((JackIO*)pAudioIO)->Initialize(AUDIO_CHANNELS, jack_playback);
92 if (error) dmsg(1,("Trying Alsa output instead.\n"));
93 }
94 #endif // HAVE_JACK
95 if (error) {
96 dmsg(1,("Initializing audio output (Alsa)..."));
97 pAudioIO = new AlsaIO();
98 int error = ((AlsaIO*)pAudioIO)->Initialize(AUDIO_CHANNELS, samplerate, num_fragments, fragmentsize, alsaout);
99 if (error) return EXIT_FAILURE;
100 }
101 dmsg(1,("OK\n"));
102
103 AudioThread* pEngine = new AudioThread(pAudioIO);
104 MidiIn* pMidiInThread = new MidiIn(pEngine);
105
106 // Loading gig file
107 result_t result = pEngine->LoadInstrument(argv[argc - 1], instrument_index);
108 if (result.type == result_type_error) return EXIT_FAILURE;
109 pEngine->Volume = volume;
110
111 dmsg(1,("Starting MIDI in thread..."));
112 if (input_client.size() > 0) pMidiInThread->SubscribeToClient(input_client.c_str());
113 pMidiInThread->StartThread();
114 dmsg(1,("OK\n"));
115
116 sleep(1);
117
118 dmsg(1,("Starting audio thread..."));
119 pAudioIO->AssignEngine(pEngine);
120 pAudioIO->Activate();
121 dmsg(1,("OK\n"));
122
123 if (run_server) {
124 dmsg(1,("Starting network server..."));
125 pLSCPServer = new LSCPServer(pEngine);
126 pLSCPServer->StartThread();
127 dmsg(1,("OK\n"));
128 }
129
130 printf("LinuxSampler initialization completed.\n");
131
132 while(true) {
133 printf("Voices: %3.3d (Max: %3.3d) Streams: %3.3d (Max: %3.3d, Unused: %3.3d)\r",
134 pEngine->ActiveVoiceCount, pEngine->ActiveVoiceCountMax,
135 pEngine->pDiskThread->ActiveStreamCount, pEngine->pDiskThread->ActiveStreamCountMax, Stream::GetUnusedStreams());
136 fflush(stdout);
137 usleep(500000);
138 }
139
140 return EXIT_SUCCESS;
141 }
142
143 void signal_handler(int signal) {
144 if (pthread_equal(pthread_self(), signalhandlerthread) && signal == SIGINT) {
145 // stop all threads
146 if (pAudioIO) pAudioIO->Close();
147 if (pMidiInThread) pMidiInThread->StopThread();
148
149 // free all resources
150 if (pMidiInThread) delete pMidiInThread;
151 if (pEngine) delete pEngine;
152 if (pAudioIO) delete pAudioIO;
153
154 printf("LinuxSampler stopped due to SIGINT\n");
155 exit(EXIT_SUCCESS);
156 }
157 }
158
159 void parse_options(int argc, char **argv) {
160 int res;
161 int option_index = 0;
162 static struct option long_options[] =
163 {
164 {"numfragments",1,0,0},
165 {"fragmentsize",1,0,0},
166 {"volume",1,0,0},
167 {"dls",0,0,0},
168 {"gig",0,0,0},
169 {"instrument",1,0,0},
170 {"inputclient",1,0,0},
171 {"alsaout",1,0,0},
172 {"jackout",1,0,0},
173 {"samplerate",1,0,0},
174 {"server",0,0,0},
175 {"help",0,0,0},
176 {0,0,0,0}
177 };
178
179 while (true) {
180 res = getopt_long_only(argc, argv, "", long_options, &option_index);
181 if(res == -1) break;
182 if (res == 0) {
183 switch(option_index) {
184 case 0: // --numfragments
185 num_fragments = atoi(optarg);
186 break;
187 case 1: // --fragmentsize
188 fragmentsize = atoi(optarg);
189 break;
190 case 2: // --volume
191 volume = atof(optarg);
192 break;
193 case 3: // --dls
194 patch_format = patch_format_dls;
195 break;
196 case 4: // --gig
197 patch_format = patch_format_gig;
198 break;
199 case 5: // --instrument
200 instrument_index = atoi(optarg);
201 break;
202 case 6: // --inputclient
203 input_client = optarg;
204 break;
205 case 7: // --alsaout
206 alsaout = optarg;
207 use_jack = false; // If this option is specified do not connect to jack
208 break;
209 case 8: { // --jackout
210 try {
211 String arg(optarg);
212 // remove outer apostrophes
213 arg = arg.substr(arg.find('\'') + 1, arg.rfind('\'') - (arg.find('\'') + 1));
214 // split in two arguments
215 jack_playback[0] = arg.substr(0, arg.find("\' "));
216 jack_playback[1] = arg.substr(arg.find("\' ") + 2, arg.size() - (arg.find("\' ") + 2));
217 // remove inner apostrophes
218 jack_playback[0] = jack_playback[0].substr(0, jack_playback[0].find('\''));
219 jack_playback[1] = jack_playback[1].substr(jack_playback[1].find('\'') + 1, jack_playback[1].size() - jack_playback[1].find('\''));
220 // this is the default but set it up anyway in case alsa_card was also used.
221 use_jack = true;
222 }
223 catch (...) {
224 fprintf(stderr, "Invalid argument '%s' for parameter --jackout\n", optarg);
225 exit(EXIT_FAILURE);
226 }
227 break;
228 }
229 case 9: // --samplerate
230 samplerate = atoi(optarg);
231 break;
232 case 10: // --server
233 run_server = true;
234 break;
235 case 11: // --help
236 printf("usage: linuxsampler [OPTIONS] <INSTRUMENTFILE>\n\n");
237 printf("--gig loads a Gigasampler instrument\n");
238 printf("--dls loads a DLS instrument\n");
239 printf("--instrument index of the instrument in the instrument file if it\n");
240 printf(" contains more than one (default: 0)\n");
241 printf("--numfragments sets the number of audio fragments\n");
242 printf("--fragmentsize sets the fragment size\n");
243 printf("--volume sets global volume gain factor (a value > 1.0 means\n");
244 printf(" amplification, a value < 1.0 means attenuation,\n");
245 printf(" default: 0.25)\n");
246 printf("--inputclient connects to an Alsa sequencer input client on startup\n");
247 printf(" (e.g. 64:0 to connect to a client with ID 64 and port 0)\n");
248 printf("--alsaout connects to the given Alsa sound device on startup\n");
249 printf(" (e.g. 0,0 to connect to hw:0,0 or plughw:0,0)\n");
250 printf("--jackout connects to the given Jack playback ports on startup\n");
251 printf(" (e.g. \"\'alsa_pcm:playback_1\' \'alsa_pcm:playback_2\'\"\n");
252 printf(" in case of stereo output)\n");
253 printf("--samplerate sets sample rate if supported by audio output system\n");
254 printf(" (e.g. 44100)\n");
255 printf("--server launch network server for remote control\n");
256 exit(EXIT_SUCCESS);
257 break;
258 }
259 }
260 }
261 }

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