2017-05-26 22:17:12 +02:00
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#include <arpa/inet.h>
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#include <QHostInfo>
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// hyperion local includes
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#include "LedDeviceUdpArtNet.h"
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LedDeviceUdpArtNet::LedDeviceUdpArtNet(const QJsonObject &deviceConfig)
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: ProviderUdp()
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{
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_deviceReady = init(deviceConfig);
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}
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bool LedDeviceUdpArtNet::init(const QJsonObject &deviceConfig)
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{
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_port = 6454;
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ProviderUdp::init(deviceConfig);
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_artnet_universe = deviceConfig["universe"].toInt(1);
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_artnet_channelsPerFixture = deviceConfig["channelsPerFixture"].toInt(3);
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return true;
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}
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LedDevice* LedDeviceUdpArtNet::construct(const QJsonObject &deviceConfig)
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{
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return new LedDeviceUdpArtNet(deviceConfig);
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}
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// populates the headers
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void LedDeviceUdpArtNet::prepare(const unsigned this_universe, const unsigned this_sequence, unsigned this_dmxChannelCount)
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{
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// WTF? why do the specs say:
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// "This value should be an even number in the range 2 – 512. "
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if (this_dmxChannelCount & 0x1)
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{
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this_dmxChannelCount++;
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}
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memcpy (artnet_packet.ID, "Art-Net\0", 8);
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artnet_packet.OpCode = htons(0x0050); // OpOutput / OpDmx
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artnet_packet.ProtVer = htons(0x000e);
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artnet_packet.Sequence = this_sequence;
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artnet_packet.Physical = 0;
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artnet_packet.SubUni = this_universe & 0xff ;
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artnet_packet.Net = (this_universe >> 8) & 0x7f;
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artnet_packet.Length = htons(this_dmxChannelCount);
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}
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int LedDeviceUdpArtNet::write(const std::vector<ColorRgb> &ledValues)
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{
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int retVal = 0;
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int thisUniverse = _artnet_universe;
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const uint8_t * rawdata = reinterpret_cast<const uint8_t *>(ledValues.data());
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/*
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This field is incremented in the range 0x01 to 0xff to allow the receiving node to resequence packets.
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The Sequence field is set to 0x00 to disable this feature.
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*/
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if (_artnet_seq++ == 0)
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{
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_artnet_seq = 1;
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}
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int dmxIdx = 0; // offset into the current dmx packet
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memset(artnet_packet.raw, 0, sizeof(artnet_packet.raw));
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for (int ledIdx = 0; ledIdx < _ledRGBCount; ledIdx++)
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{
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artnet_packet.Data[dmxIdx++] = rawdata[ledIdx];
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if ( (ledIdx % 3 == 2) && (ledIdx > 0) )
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{
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dmxIdx += (_artnet_channelsPerFixture-3);
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}
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// is this the last byte of last packet || last byte of other packets
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if ( (ledIdx == _ledRGBCount-1) || (dmxIdx >= DMX_MAX) )
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{
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prepare(thisUniverse, _artnet_seq, dmxIdx);
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2017-08-04 12:01:45 +02:00
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retVal &= writeBytes(18 + qMin(dmxIdx, DMX_MAX), artnet_packet.raw);
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2017-05-26 22:17:12 +02:00
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memset(artnet_packet.raw, 0, sizeof(artnet_packet.raw));
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thisUniverse ++;
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dmxIdx = 0;
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}
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}
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return retVal;
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}
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