purezen 0.0.2

Runtime for the Pure Data (Pd) audio programming language, implemented as an extensible audio library allowing full control over signal processing, message passing, and graph manipulation. Pure Data is a graph-based programming language environment creating interactive music and multimedia works.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110

/*
 *  Copyright 2009,2010,2011 Reality Jockey, Ltd.
 *                 info@rjdj.me
 *                 http://rjdj.me/
 *
 *  This file is part of ZenGarden.
 *
 *  ZenGarden is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  ZenGarden is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with ZenGarden.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "MessageUnpack.h"
#include "PdGraph.h"

message::Object *MessageUnpack::new_object(pd::Message *init_message, PdGraph *graph) {
  return new MessageUnpack(init_message, graph);
}

MessageUnpack::MessageUnpack(pd::Message *init_message, PdGraph *graph) :
    message::Object(1, (init_message->get_num_elements() < 2) ? 2 : init_message->get_num_elements(), graph) {
  if (init_message->get_num_elements() < 2) {
    // if unpack is not initialised with anything, assume two "anything" outputs
    templateMessage = PD_MESSAGE_ON_STACK(2);
    templateMessage->from_timestamp(0.0, 2);
    templateMessage->set_anything(0);
    templateMessage->set_anything(1);
    templateMessage = templateMessage->clone_on_heap();
  } else {
    templateMessage = init_message->clone_on_heap();
    templateMessage->resolve_symbols_to_type();
  }
}

MessageUnpack::~MessageUnpack() {
  templateMessage->free_message();
}

string MessageUnpack::toString() {
  std::string out = MessageUnpack::get_object_label();
  for (int i = 0; i < templateMessage->get_num_elements(); i++) {
    switch (templateMessage->get_type(i)) {
      case FLOAT: out += " f"; break;
      case SYMBOL: out += " s"; break;
      case BANG: out += " b"; break;
      case LIST: out += " l"; break;
      case ANYTHING:
      default: out += " a"; break;
    }
  }
  return out;
}

void MessageUnpack::process_message(int inlet_index, pd::Message *message) {
  int numElements = message->get_num_elements();
  if (templateMessage->get_num_elements() < message->get_num_elements()) {
    numElements = templateMessage->get_num_elements();
  }
  pd::Message *outgoing_message = PD_MESSAGE_ON_STACK(1);
  for (int i = numElements-1; i >= 0; i--) {
    elementType = templateMessage->get_type(i);
    if (elementType == message->get_type(i) || elementType == ANYTHING) {
      switch (elementType) {
        case FLOAT: {
          outgoing_message->from_timestamp_and_float(message->get_timestamp(), message->get_float(i));
          send_message(i, outgoing_message);
          break;
        }
        case SYMBOL: {
          outgoing_message->from_timestamp_and_symbol(message->get_timestamp(), message->get_symbol(i));
          send_message(i, outgoing_message);
          break;
        }
        case ANYTHING: {
          switch (message->get_type(i)) {
            case FLOAT: {
              outgoing_message->from_timestamp_and_float(message->get_timestamp(), message->get_float(i));
              break;
            }
            case SYMBOL: {
              outgoing_message->from_timestamp_and_symbol(message->get_timestamp(), message->get_symbol(i));
              break;
            }
            default: {
              break;
            }
          }
          send_message(i, outgoing_message);
        }
        default: {
          break;
        }
      }
    } else {
      graph->print_err("unpack: type mismatch: %s expected but got %s.",
          utils::message_element_type_to_string(elementType),
          utils::message_element_type_to_string(message->get_type(i)));
    }
  }
}