fae2b935e1
GoldenCheetah lacks support for splitting multisport fit files. These files combine multiple sports recorded into a single activity. Those sports are marked by session entries. These session entries are parsed but ignored. Fit files are parsed on-the-fly without caching data. This is great in terms of memory useage but bad in terms of splitting the activity into sessions because of the fit specification. The specification allows session entries to appear either grouped at the beginning of the file or at the end of the session spread throughout the file. We do cache the most relevant data entries along with the session field entries. This hopefully adds as little overhead as possible while parsing and in memory useage, but allows us to determine if there are multiple session entries in one file. If so, we can split the single file into multiple ones, each representing a single sport (activity). Eg.: If a triathlon is recorded using the multisport method it is split up into the following activities: - Swim - Transition - Bike - Transition - Run This corrects the metric calculation. Prior to this change the parsed activity is tagged as a run activity and the whole data - swim/bike HR, bike cadence, ... - was taken into account for the run metrics calculation. Now only the relevant part of the file is taken into account. Laps as well as XData records are also split up to the files created out of a single multisport file and are aligned in time. It turned out that it is best to treat transitions as run. Fixes: #3211
GoldenCheetah
About
GoldenCheetah is an open-source data analysis tool primarily written in C++ with Qt for cyclists and triathletes with support for training as well.
GoldenCheetah can connect with indoor trainers and cycling equipment such as cycling computers and power meters to import data.
In addition, GoldenCheetah can connect to cloud services.
It can then manipulate and view the data, as well as analyze it.
Installing
Golden Cheetah install and build instructions are documented for each platform;
INSTALL-WIN32 For building on Microsoft Windows
INSTALL-LINUX For building on Linux
INSTALL-MAC For building on Apple OS X
OSX: 
Windows:
Alternatively, official builds are available from http://www.goldencheetah.org
whilst the latest developer builds are available from https://github.com/GoldenCheetah/GoldenCheetah/releases