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DMX512/sACN/E1.31 support (#184)

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* Started on support for sACN/E1.31/DMX512
Just a clone of udpraw for now

* It's ALIVE!!
This adds somewhat working DMX512/sACN/E1.31 support.
I've tested it against an ESPixelStick but have no other "real" hardware
TODO:
configure universe#
configure universe and led offset
configure source names (all hard coded now...)

* oops.... forgot that dmx element 0 isnt rgb data but needs to be zero

* added universe support in the config
assorted code cleanups
This commit is contained in:
penfold42
2016-08-20 01:14:52 +10:00
committed by redPanther
parent 55cc06615b
commit 85e3f154d6
4 changed files with 217 additions and 0 deletions
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77
libsrc/leddevice/LedDeviceUdpE131.cpp Normal file
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// STL includes
#include <cstring>
#include <cstdio>
#include <iostream>
// Linux includes
#include <fcntl.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
// hyperion local includes
#include "LedDeviceUdpE131.h"
LedDeviceUdpE131::LedDeviceUdpE131(const std::string& outputDevice, const unsigned latchTime, const unsigned universe)
: LedUdpDevice(outputDevice, latchTime)
, _e131_universe(universe)
{
// empty
}
#define CID "hyperion!\0"
#define SOURCE_NAME "hyperion on hostname\0"
int LedDeviceUdpE131::write(const std::vector<ColorRgb> &ledValues)
{
_ledCount = ledValues.size();
int _dmxChannelCount = 3 * std::min(_ledCount,170); // DMX512 has max 512 channels == 170 RGB leds
memset(e131_packet.raw, 0, sizeof(e131_packet.raw));
/* Root Layer */
e131_packet.preamble_size = htons(16);
e131_packet.postamble_size = 0;
memcpy (e131_packet.acn_id, _acn_id, 12);
e131_packet.root_flength = htons(0x7000 | (110+_dmxChannelCount) );
e131_packet.root_vector = htonl(VECTOR_ROOT_E131_DATA);
memcpy (e131_packet.cid, CID, sizeof(CID) );
/* Frame Layer */
e131_packet.frame_flength = htons(0x7000 | (88+_dmxChannelCount));
e131_packet.frame_vector = htonl(VECTOR_E131_DATA_PACKET);
memcpy (e131_packet.source_name, SOURCE_NAME, sizeof(SOURCE_NAME));
e131_packet.priority = 100;
e131_packet.reserved = htons(0);
e131_packet.sequence_number = _e131_seq++;
e131_packet.options = 0; // Bit 7 = Preview_Data
// Bit 6 = Stream_Terminated
// Bit 5 = Force_Synchronization
e131_packet.universe = htons(_e131_universe);
/* DMX Layer */
e131_packet.dmp_flength = htons(0x7000 | (11+_dmxChannelCount));
e131_packet.dmp_vector = VECTOR_DMP_SET_PROPERTY;
e131_packet.type = 0xa1;
e131_packet.first_address = htons(0);
e131_packet.address_increment = htons(1);
e131_packet.property_value_count = htons(1+_dmxChannelCount);
int led_idx=0;
e131_packet.property_values[0] = 0; // start code
for (int _dmxIdx=1; _dmxIdx <= _dmxChannelCount; )
{
e131_packet.property_values[_dmxIdx++] = ledValues[led_idx].red;
e131_packet.property_values[_dmxIdx++] = ledValues[led_idx].green;
e131_packet.property_values[_dmxIdx++] = ledValues[led_idx].blue;
led_idx ++;
}
return writeBytes(E131_DMP_DATA + 1 + _dmxChannelCount, e131_packet.raw);
}
int LedDeviceUdpE131::switchOff()
{
return write(std::vector<ColorRgb>(_ledCount, ColorRgb{0,0,0}));
}