1 /* dssi_data.h - DSSI data 2 Copyright (C) 2005, 2006 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 #include <stdlib.h> 39 #include <dlfcn.h> 40 #include <sys/time.h> 41 #include <jni.h> 42 #include <dssi.h> 43 #include <jack/jack.h> 44 #include <alsa/asoundlib.h> 45 #include <alsa/seq.h> 46 47 #include <stdio.h> 48 49 #include "../classpath/jcl.h" 50 51 /* Specify the size of the circular buffer. It only needs to be big 52 enough to hold the events that happen between jack callbacks (~ 53 1/40th of a second). */ 54 #define EVENT_BUFFER_SIZE 1024 55 56 /* Every DSSI Synthesizer has one of these associated with it. The 57 Java class sees it as a "long" handle. */ 58 59 typedef struct 60 { 61 /* This is a handle to the dlopen'ed .so file containing the DSSI 62 synthesizer. */ 63 void *dlhandle; 64 65 /* The function to call to get the DSS_Descriptor. */ 66 DSSI_Descriptor_Function fn; 67 68 /* The descriptor for this synthesizer. See the dssi.h system 69 header. */ 70 const DSSI_Descriptor *desc; 71 72 /* We currently open a jack client connection for every 73 synthesizer. */ 74 jack_client_t *jack_client; 75 76 /* We currently only handle stereo jack connections. Output from 77 mono synthesizers is sent to both left and right ports. */ 78 jack_port_t *jack_left_output_port; 79 jack_port_t *jack_right_output_port; 80 81 /* We use a circular buffer to hold MIDI events before processing 82 them in the jack audio processing callback function. */ 83 snd_seq_event_t midiEventBuffer[EVENT_BUFFER_SIZE]; 84 int midiEventReadIndex; 85 int midiEventWriteIndex; 86 87 /* This is a handle the synthesizers underlying LADSPA structure. 88 See the ladspa.h system header for details. */ 89 LADSPA_Handle plugin_handle; 90 91 /* These are buffers we pass to the DSSI Synthesizer for 92 filling. */ 93 float *left_buffer; 94 float *right_buffer; 95 96 /* The number of input controls for this synth. */ 97 unsigned control_count; 98 99 /* An array of control values, control_count in length. */ 100 LADSPA_Data *control_values; 101 102 /* A mapping of MIDI controllers to control values. There are a 103 maximum of 128 MIDI controllers. */ 104 unsigned control_value_map[128]; 105 106 /* A mapping of MIDI controllers to LADSPA ports. There are a 107 maximum of 128 MIDI controllers. */ 108 unsigned control_port_map[128]; 109 110 /* The sample rate. */ 111 jack_nframes_t sample_rate; 112 113 } dssi_data; 114 115