[opus] [EXTERNAL] Re: Developing OPUS on TI CC3220

[Jean-Marc Valin]

On 02/20/2018 06:48 PM, Rodriguez, Vince wrote:
> I am trying to get the library to build without using the pseudostack
> define, and use either VAR_ARRAYS or ALLOC, but it seems the global
> stack is not defined.

Not sure what you mean here. If your compiler supports C99 VLAs, then by
all means just define VAR_ARRAYS and you're good to go. If not, the
second best option is alloca(), which you can use by defining
USE_ALLOCA. If your compiler supports alloca() and USE_ALLOCA doesn't
work, then you may need to make minor tweaks to celt/stack_alloc.h. Do
not use NONTHREADSAFE_PSEUDOSTACK unless all other options fail.

Cheers,

	Jean-Marc

> -----Original Message----- From: Jean-Marc Valin
> [mailto:jmvalin at jmvalin.ca] Sent: Tuesday, February 20, 2018 5:40 PM 
> To: Rodriguez, Vince; opus at xiph.org Subject: [EXTERNAL] Re: [opus]
> Developing OPUS on TI CC3220
> 
> Hi Vince,
> 
> Normally, Opus should work fine on the CC3220, though real-time
> encoding may be a bit tight depending on what configuration you
> choose. You'll probably want to configure with --enable-fixed-point
> and --disable-float-api (or define FIXED_POINT and DISABLE_FLOAT_API
> if you don't use autoconf).
> 
> The encoder has a bunch of run-time settings that you may want to
> set, depending on your application. These include bitrate, complexity
> (probably a low setting for that that chip), and bitrate management
> (CBR/VBR/CVBR).
> 
> In the end, aside from the complexity requirements, you should need
> to do anything special to get Opus running on your chip.
> 
> Cheers,
> 
> Jean-Marc
> 
> On 02/20/2018 05:46 PM, Rodriguez, Vince wrote:
>> I'm looking to try to port a Opus Decoder and Encoder onto the TI 
>> CC3220SF (http://www.ti.com/product/CC3220) device. Currently, I
>> have successfully been able to get the decode working for a .ogg
>> file saved locally to the serial flash. My end goal is
>> bidirectional audio using OPUS between two devices. While looking
>> into the documentation for the Encoder, I was not sure what the
>> best step forward would be in trying to enable this streaming
>> application.
>> 
>> 
>> 
>> Can someone give me a little guidance on how to properly setup the
>>  encoder for streaming applications, and if I need to do anything 
>> special to ensure the encoder works correctly on an ARM M4 (not
>> Floating point) MCU?
>> 
>> 
>> 
>> Thanks!
>> 
>> 
>> 
>> *Vince Rodriguez*
>> 
>> 
>> 
>> 
>> 
>> 
>> 
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