From 9a68a968841d6d94d615a14e2068cbdb1b6743b8 Mon Sep 17 00:00:00 2001
From: jsiegle <jsiegle@mit.edu>
Date: Mon, 17 Jun 2013 19:45:08 -0400
Subject: [PATCH] Simplify spike data format
---
.../Visualization/SpikeDisplayCanvas.cpp | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/Source/Processors/Visualization/SpikeDisplayCanvas.cpp b/Source/Processors/Visualization/SpikeDisplayCanvas.cpp
index 5d7ab9458..222f6fc28 100755
--- a/Source/Processors/Visualization/SpikeDisplayCanvas.cpp
+++ b/Source/Processors/Visualization/SpikeDisplayCanvas.cpp
@@ -542,7 +542,22 @@ void SpikePlot::writeSpike(const SpikeObject& s)
packSpike(&s, spikeBuffer, MAX_SPIKE_BUFFER_LEN);
- fwrite(spikeBuffer, 1, MAX_SPIKE_BUFFER_LEN, file);
+ int totalBytes = s.nSamples * s.nChannels * 2 + // account for samples
+ s.nChannels * 4 + // acount for threshold and gain
+ 15; // 15 bytes in every SpikeObject
+
+
+ // format:
+ // 1 byte of event type (always = 4 for spikes)
+ // 8 bytes for 64-bit timestamp
+ // 2 bytes for 16-bit electrode ID
+ // 2 bytes for 16-bit number of channels (n)
+ // 2 bytes for 16-bit number of samples (m)
+ // 2*n*m bytes for 16-bit samples
+ // 2*n bytes for 16-bit gains
+ // 2*n bytes for 16-bit thresholds
+
+ fwrite(spikeBuffer, 1, totalBytes, file);
}
@@ -555,7 +570,7 @@ String SpikePlot::generateHeader()
header += String(HEADER_SIZE);
header += ";\n";
- header += "header.description = 'Spike data...live it up!'; \n";
+ header += "header.description = 'Each record contains 1 uint8 eventType, 1 uint64 timestamp, 1 uint16 electrodeID, 1 uint16 numChannels (n), 1 uint16 numSamples (m), n*m uint16 samples, n uint16 channelGains, and n uint16 thresholds'; \n";
header += "header.date_created = '";
header += recordNode->generateDateString();
--
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