Ref: ACTION-1763: Write up the longer text description for the MSE spec

For Internal Review. The following completes Action-1763.

 

Colleagues,

 

I've tried my hand on a non-technical long description of the complex
flowchart included in the Draft MSE spec
(http://www.w3.org/TR/2015/CR-media-source-20151112/). I have attached a
MSWord document to this email, and will also paste the text below.

 

I welcome feedback on accuracy and clarity (and hope I've hit the mark) -
comments welcome.

 

Thanks.

 

JF
_______________________

 


Non-technical description of the Process Flowchart image:


The flowchart reads from a top down perspective. At the top is a container
marked MediaSource, with 3 arrows flowing down to containers each marked
SourceBuffer. (Not indicated, but for sake of clarity in this description
referred to here-after as SourceBuffer 1, shown with a blue background;
SourceBuffer 2, shown with a mauve background; and SourceBuffer 3, shown
with a rose background; as described from Left to Right).


Below these 3 SourceBuffer containers is a dashed line, with an indication
that the top half (MediaSource plus the 3 SourceBuffer containers) are taken
from the Media Source API, while the details to follow are taken from the
HTMLMediaElement.

 


Flowing down from SourceBuffer 1


Flowing down from SourceBuffer 1 is a blue triangle with 3 arrows pointing
to 3 process indications, each labeled Track Buffer. 

The first Track Buffer from the left then flows to a red box labeled Video
Decoder, which then flows to an indicator (three dots stacked vertically)
labeled Video Tag Display Region.

The second Track Buffer flows to a green box labeled Audio Decoder, which
then follows to an indicator of an open switch, which then continues to an
indicator (green circle with an X) labeled Audio Device.

The third Track Buffer also flows to a green box labeled Video Decoder,
which also flows to a switch, this time however indicated closed, which then
also continues to the same indicator (green circle with an X) labeled Audio
Device as the second Track Buffer.

 


Flowing down from SourceBuffer 2


Flowing down from SourceBuffer 2 is a mauve triangle with an arrow flowing
to a red box labeled Video Decoder, which then flows to the same  Video Tag
Display Region previously mentioned in SourceBuffer 1. 

 


Flowing down from SourceBuffer 3


Flowing down from SourceBuffer 3 is a rose triangle with an arrow flowing to
a green box labeled Audio Decoder, which then flows through a closed switch,
which then also continues to the same indicator (green circle with an X)
labeled Audio Device previously mentioned in SourceBuffer 1

 

01/05/16 - J. Foliot, Deque Systems