src/lib/disk_writer_messages.cc

   1 /*
   2     Copyright (C) 2023 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic 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 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21
  22 #include "dcpomatic_assert.h"
  23 #include "disk_writer_messages.h"
  24 #include "nanomsg.h"
  25 #include <dcp/raw_convert.h>
  26
  27
  28 using std::string;
  29 using boost::optional;
  30
  31
  32 boost::optional<DiskWriterBackEndResponse>
  33 DiskWriterBackEndResponse::read_from_nanomsg(Nanomsg& nanomsg, int timeout)
  34 {
  35         auto s = nanomsg.receive(timeout);
  36         if (!s) {
  37                 return {};
  38         }
  39         if (*s == DISK_WRITER_OK) {
  40                 return DiskWriterBackEndResponse::ok();
  41         } else if (*s == DISK_WRITER_ERROR) {
  42                 auto const m = nanomsg.receive(500);
  43                 auto const n = nanomsg.receive(500);
  44                 auto const p = nanomsg.receive(500);
  45                 return DiskWriterBackEndResponse::error(m.get_value_or(""), dcp::raw_convert<int>(n.get_value_or("0")), dcp::raw_convert<int>(p.get_value_or("0")));
  46         } else if (*s == DISK_WRITER_PONG) {
  47                 return DiskWriterBackEndResponse::pong();
  48         } else if (*s == DISK_WRITER_FORMAT_PROGRESS) {
  49                 auto progress = nanomsg.receive(500);
  50                 return DiskWriterBackEndResponse::format_progress(dcp::raw_convert<float>(progress.get_value_or("0")));
  51         } else if (*s == DISK_WRITER_COPY_PROGRESS) {
  52                 auto progress = nanomsg.receive(500);
  53                 return DiskWriterBackEndResponse::copy_progress(dcp::raw_convert<float>(progress.get_value_or("0")));
  54         } else if (*s == DISK_WRITER_VERIFY_PROGRESS) {
  55                 auto progress = nanomsg.receive(500);
  56                 return DiskWriterBackEndResponse::verify_progress(dcp::raw_convert<float>(progress.get_value_or("0")));
  57         } else {
  58                 DCPOMATIC_ASSERT(false);
  59         }
  60
  61         return {};
  62 }
  63
  64
  65 /** @return true if the message was sent, false if there was a timeout */
  66 bool
  67 DiskWriterBackEndResponse::write_to_nanomsg(Nanomsg& nanomsg, int timeout) const
  68 {
  69         string message;
  70
  71         switch (_type)
  72         {
  73                 case Type::OK:
  74                         message = String::compose("%1\n", DISK_WRITER_OK);
  75                         break;
  76                 case Type::ERROR:
  77                         message = String::compose("%1\n%2\n%3\n%4\n", DISK_WRITER_ERROR, _error_message, _ext4_error_number, _platform_error_number);
  78                         break;
  79                 case Type::PONG:
  80                         message = String::compose("%1\n", DISK_WRITER_PONG);
  81                         break;
  82                 case Type::FORMAT_PROGRESS:
  83                         message = String::compose("%1\n", DISK_WRITER_FORMAT_PROGRESS);
  84                         message += dcp::raw_convert<string>(_progress) + "\n";
  85                         break;
  86                 case Type::COPY_PROGRESS:
  87                         message = String::compose("%1\n", DISK_WRITER_COPY_PROGRESS);
  88                         message += dcp::raw_convert<string>(_progress) + "\n";
  89                         break;
  90                 case Type::VERIFY_PROGRESS:
  91                         message = String::compose("%1\n", DISK_WRITER_VERIFY_PROGRESS);
  92                         message += dcp::raw_convert<string>(_progress) + "\n";
  93                         break;
  94         }
  95
  96
  97         return nanomsg.send(message, timeout);
  98 }
  99
 100