[Coco] RG6 video playback test

[Zippster]

Hi Brendan,

It’s using raw data (pre-rendered), without any decoding, in a precisely timed 
sector read routine.  It requires only the video pages used (one at the moment)
and a small 512 byte buffer for audio, outside of the player code itself of course.  

An optimal sector interleave format is required, but in this way, complexity of the
image and file length do not matter.  Up to 3+ hours of continuous playback anyway, 
due to max file size. 

Right now there’s no screen buffering, so there’s some “tearing” when there’s large
changes between frames (actually seeing the bytes being placed in video ram).
Next I’ll implement screen buffering to eliminate that.

- Ed



> On Apr 14, 2017, at 7:17 AM, Brendan Donahe <brendan at polylith.com> wrote:
> 
> Very impressive, Ed!
> 
> Does this decoder apply "differences" to a single page of video or is it
> capable of this frame rate simply by drawing the entire image on
> alternating pages?  (Or perhaps it's a combination of the two?)
> 
> Thanks for sharing!
> 
> On Apr 14, 2017 7:01 AM, "Ron Klein" <ron at kdomain.org> wrote:
> 
> Hi Ed,
> 
> Now all we need is a mechanism to dump Youtube videos to the CocoSDC for
> your player to stream!  :)
> 
> Thanks, Ed!!!!
> 
> -Ron
> 
> 
> 
> On Thu, Apr 13, 2017 at 9:57 PM, Zippster <zippster278 at gmail.com> wrote:
> 
>> Thanks Ron.
>> 
>> I think we will end up with a pretty nifty little media player for
>> the CoCo with several different video and audio formats.  :)
>> 
>> - Ed
>> 
>> 
>> 
>>> On Apr 13, 2017, at 9:44 PM, Ron Klein <ron at kdomain.org> wrote:
>>> 
>>> Hi Ed,
>>> 
>>> I can't believe this is running on a Coco 2.  Wow.
>>> 
>>> I love seeing your progress with this!
>>> 
>>> -Ron
>>> 
>>> 
>>> 
>>> 
>>> On Thu, Apr 13, 2017 at 9:39 PM, Zippster <zippster278 at gmail.com> wrote:
>>> 
>>>> Hi guys,
>>>> 
>>>> Here is a video of RG6 video playback using a CoCo2 and the CoCo SDC.
>>>> This is at 23fps, with 11.9KHz audio.  Double buffering is not
>> implemented
>>>> in
>>>> the player yet, so there is tearing evident, but more great potential
>> for
>>>> some
>>>> interesting media playback on the CoCo.  :)
>>>> 
>>>> <https://drive.google.com/file/d/0B1sgl615FlGnbG9GNjVncVhEZWc/view <
>>>> https://drive.google.com/file/d/0B1sgl615FlGnbG9GNjVncVhEZWc/view>>
>>>> 
>>>> 
>>>> - Ed
>>>> 
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