Re: Speccy video player in C?!!

From	Matthew Westcott <gasman@raww.org>
Newsgroups	comp.sys.sinclair
Subject	Re: Speccy video player in C?!!
Date	2011-02-04 12:29 +0000
Message-ID	<8r29onFudkU1@mid.individual.net> (permalink)
References	<e4e3c6fa-cd0c-4de7-b588-57fb290cdcb3@q2g2000pre.googlegroups.com> <8r23fpFjp6U1@mid.individual.net> <e5f41f0d-92d2-41fc-aaaa-8e91053053e0@8g2000prt.googlegroups.com>

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On 04/02/2011 10:57, BitNaughty wrote:
> On Feb 4, 10:42 am, Matthew Westcott<gas...@raww.org>  wrote:
>> On 04/02/2011 09:39, BitNaughty wrote:
>
>> The C code on Github is just the converter that runs on the PC, to
>> convert your video to .dvo format which plays on the Spectrum. The
>> player itself is done in assembler:http://divideo.zxdemo.org/player.asm
>
> Could you explain some of the theory behind it? That much of Z80 Asm
> is a bit intimidating! :) I'd *like* to go through the code, but after
> knowing a little of what went into it first.....

It's all explained at the bottom of http://divideo.zxdemo.org/ - it's 
hard to break down the explanation any further than that, because of how 
it all fits together (the file format is designed around the player and 
vice versa) - but the main gist is that you have a series of 'packets' 
each consisting of one audio sample and a sequence of bytes to copy to 
the screen, all carefully arranged so that the audio sample is the right 
one to be played at the specific moment that you get to it.

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Thread

Re: Speccy video player in C?!! Matthew Westcott <gasman@raww.org> - 2011-02-04 12:29 +0000
  Re: Speccy video player in C?!! "Paul E Collins" <find_my_real_address@CL4.org> - 2011-02-10 21:53 +0000
    Re: Speccy video player in C?!! "Daniel Mandic" <daniel_mandic@hotmail.com> - 2011-02-10 22:29 +0000
  Re: Speccy video player in C?!! Matthew Westcott <gasman@raww.org> - 2011-02-11 00:17 +0000
    Re: Speccy video player in C?!! Matthew Westcott <gasman@raww.org> - 2011-02-13 16:26 +0000
  Re: Speccy video player in C?!! Matthew Westcott <gasman@raww.org> - 2011-02-08 23:04 +0000
    Re: Speccy video player in C?!! BitNaughty <bit-naughty@hotmail.com> - 2011-02-10 05:09 -0800
  Re: Speccy video player in C?!! BitNaughty <bit-naughty@hotmail.com> - 2011-02-08 06:20 -0800

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