source: roaraudio/roard/codecfilter_roardmx.c @ 5927:95a79080ea30

//codecfilter_roardmx.c:

/*
 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2013
 *
 *  This file is part of roard a part of RoarAudio,
 *  a cross-platform sound system for both, home and professional use.
 *  See README for details.
 *
 *  This file is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 3
 *  as published by the Free Software Foundation.
 *
 *  RoarAudio 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this software; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 *
 */

#include "roard.h"

#ifndef ROAR_WITHOUT_DCOMP_LIGHT

static inline int __read_sset(int id, struct roar_stream_server * ss, struct roar_roardmx_message * mes) {
 uint16_t channel;
 uint8_t value;
 int i, c;

 // we ignore errors here at the moment as 0 not < -1
 c = roar_roardmx_message_numchannels(mes);
 ROAR_DBG("light_check_stream(id=%i): Number of subframes: %u", id, c);

 for (i = 0; i < c; i++) {
  if ( roar_roardmx_message_get_chanval(mes, &channel, &value, i) == -1 )
   return -1;

  if ( g_light_state.channels < channel ) {
   ROAR_WARN("light_check_stream(id=%i): Writing on non extisting DMX channel %u", id, channel);
   continue;
  } else {
   g_light_state.state[channel]   = value;
   g_light_state.changes[channel] = 0xFF; // the channel changed
  }
 }

 return 0;
}

static inline int __read_events(int id, struct roar_stream_server * ss, struct roar_roardmx_message * mes) {
 const uint8_t * events;
 size_t len;

 (void)id, (void)ss;

 if ( roar_roardmx_message_get_events(mes, &events, &len) == -1 )
  return -1;

 return light_dmxevent_add(events, len);
}

int cf_light_roardmx_read(int id, struct roar_stream_server * ss) {
 struct roar_roardmx_message  mes;
 unsigned char type;

 if ( roar_roardmx_message_recv(&mes, &(ss->vio)) == -1 )
  return -1;

 if ( roar_roardmx_message_get_type(&mes, &type) == -1 )
  return -1;

 switch (type) {
  case ROAR_ROARDMX_TYPE_SSET: return __read_sset(id, ss, &mes); break;
  case ROAR_ROARDMX_TYPE_EVENT: return __read_events(id, ss, &mes); break;
 }

 roar_err_set(ROAR_ERROR_NSTYPE);
 return -1;
}

static inline int __write_events(int id, struct roar_stream_server * ss) {
 struct roar_roardmx_message  mes;
 const uint8_t * events;
 size_t len;

 if ( light_dmxevent_read(&events, &len) == -1 )
  return -1;

 // check if we need to send events at all:
 if ( len == 0 )
  return 0;

 // ok, now let's build the message:
 if ( roar_roardmx_message_new_event(&mes) == -1 )
  return -1;

 if ( roar_roardmx_message_add_events(&mes, events, len) == -1 )
  return -1;

 // and send it:
 if ( roar_roardmx_message_send(&mes, &(ss->vio)) == -1 )
  return -1;

 return 0;
}

static inline int __write_channels(int id, struct roar_stream_server * ss) {
 struct roar_roardmx_message  mes;
 int have_message = 0;
 int i;

 for (i = 0; i < g_light_state.channels; i++) {
  if ( g_light_state.changes[i] ) {
   if ( !have_message )
    if ( roar_roardmx_message_new_sset(&mes) == -1 )
     return -1;

   have_message = 2;

   if ( roar_roardmx_message_add_chanval(&mes, i, g_light_state.state[i]) == -1 ) {
    if ( roar_roardmx_message_send(&mes, &(ss->vio)) == -1 )
     return -1;

    if ( roar_roardmx_message_new_sset(&mes) == -1 )
     return -1;

    have_message = 1;
   }
  }
 }

 if ( have_message == 2 )
  if ( roar_roardmx_message_send(&mes, &(ss->vio)) == -1 )
   return -1;

 return 0;
}

int cf_light_roardmx_write(int id, struct roar_stream_server * ss) {
 if ( __write_events(id, ss) == -1 )
  return -1;

 if ( __write_channels(id, ss) == -1 )
  return -1;

 return 0;
}

#endif

//ll