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Reduce the amount of gaschange events.

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Previously, gaschange events were emitted for every single sample.
With this change, the event is only emitted when the gas mix has
actually changed.
This commit is contained in:
Jef Driesen 2012-12-06 20:08:22 +01:00
parent 99fe2c693f
commit f5b5e41181
1 changed files with 14 additions and 5 deletions
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19
src/shearwater_predator_parser.c
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@ -196,6 +196,9 @@ shearwater_predator_parser_samples_foreach (dc_parser_t *abstract, dc_sample_cal
// Get the unit system.
unsigned int units = data[8];
// Previous gas mix.
unsigned int o2_previous = 0, he_previous = 0;
unsigned int time = 0;
unsigned int offset = SZ_BLOCK;
while (offset + SZ_BLOCK < size) {
@ -229,11 +232,17 @@ shearwater_predator_parser_samples_foreach (dc_parser_t *abstract, dc_sample_cal
if (callback) callback (DC_SAMPLE_TEMPERATURE, sample, userdata);
// Gaschange.
sample.event.type = SAMPLE_EVENT_GASCHANGE2;
sample.event.time = 0;
sample.event.flags = 0;
sample.event.value = data[offset + 7] | (data[offset + 8] << 16);
if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
unsigned int o2 = data[offset + 7];
unsigned int he = data[offset + 8];
if (o2 != o2_previous || he != he_previous) {
sample.event.type = SAMPLE_EVENT_GASCHANGE2;
sample.event.time = 0;
sample.event.flags = 0;
sample.event.value = o2 | (he << 16);
if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
o2_previous = o2;
he_previous = he;
}
// Deco stop / NDL.
unsigned int decostop = array_uint16_be (data + offset + 2);