From 5dc7e54596448be828ea695e5e999cd620d1bc60 Mon Sep 17 00:00:00 2001
From: Jef Driesen <jef@libdivecomputer.org>
Date: Mon, 10 Feb 2020 22:53:27 +0100
Subject: [PATCH] Implement the gas mix sample

The current gas mix index is stored in the 11th bit of the sample value.
---
 src/cressi_goa_parser.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/cressi_goa_parser.c b/src/cressi_goa_parser.c
index bd89a54..d7599dc 100644
--- a/src/cressi_goa_parser.c
+++ b/src/cressi_goa_parser.c
@@ -170,6 +170,7 @@ cressi_goa_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t c
 	unsigned int time = 0;
 	unsigned int interval = 5;
 	unsigned int complete = 1;
+	unsigned int gasmix_previous = 0xFFFFFFFF;
 
 	unsigned int offset = SZ_HEADER;
 	while (offset + 2 <= size) {
@@ -193,6 +194,15 @@ cressi_goa_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t c
 			unsigned int depth = value & 0x07FF;
 			sample.depth = depth / 10.0;
 			if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
+
+			// Gas change.
+			unsigned int gasmix = (value & 0x0800) >> 11;
+			if (gasmix != gasmix_previous) {
+				sample.gasmix = gasmix;
+				if (callback) callback (DC_SAMPLE_GASMIX, sample, userdata);
+				gasmix_previous = gasmix;
+			}
+
 			complete = 1;
 		} else if (type == TEMPERATURE) {
 			// Temperature (1/10 °C).