Re: [Discuss-gnuradio] GNURadio OOT vector input/output with different size

[Patrick Sathyanathan]

Try this instead:

const std::vector<int> inputs{4000,4000,4000,4000,4000,4000,4000,4000};

and make sure you compile with c++11 enabled.

--Patrick

---

From: Discuss-gnuradio <discuss-gnuradio-bounces+address@hidden> on behalf of Ali <address@hidden>
Sent: Thursday, July 20, 2017 12:13 AM
To: address@hidden
Subject: Re: [Discuss-gnuradio] GNURadio OOT vector input/output with different size

 

Hi,

I dont have any background about C++. So I could not generate the std::vector<int> with the desired content and could not fınd anything on the internet. 

const std::vector<int> inputs[] = {4000,4000,4000,4000,4000,4000,4000,4000};

does not work. I am getting the following error: 

"conversion from 'int' to non-scalar type 'std::vector<int>' requested"

Best,

Ali

 

2017-07-18 11:51 GMT+03:00 Marcus Müller <address@hidden>:

Hi Ali,

I think this should also work, shouldn't it?

no, that's why I explained what you need to do (use makev).

Does this part need to be changed since I am working with the vectors?

No, not really. The vectors are still only consecutive numbers in memory.

Best regards,

Marcus

On 18.07.2017 07:51, Ali wrote:

Hi,

1- Actually I am using the followings

make(8,8,1000*sizeof(float))

make3(4,4,1000*sizeof(float),1000*sizeof(float),4*sizeof(float))

I think this should also work, shouldn't it?

2- Under the general work function I am using the followings:

const float *in1 = (const float *) input_items[0]

...

float *out1 = (float *) output_items[0]

Does this part need to be changed since I am working with the vectors?

Thanks,

Ali

2017-07-17 16:42 GMT+03:00 Marcus Müller <address@hidden>:

Hi Ali,

So, you want one block with:

• 8 inputs, itemsize0…7 = 1000*4B = 4000B
• 4 outputs, itemsize0=itemsize1=4000B, itemsize2=itemsize3=16B

Correct?

You need to generate two std::vector<int> with content

{4000,4000,4000,4000,4000,4000,4000,4000}

and

{4000,4000,16,16}

respectively, and use gr::io_signature::makev(int min_streams, int max_streams, vector) to generate the io_signatures[1] that you use in your block's constructor. The question whether your block should be a general, or a sync block, is independent from the item sizes of the in and outputs, but depends on whether there's always a fixed ratio of produced output items to consumed input items, as explained in [2].

Best regards,

Marcus

[1] https://gnuradio.org/doc/doxygen/classgr_1_1io__signature.html#a99e0f9e8de8e7ce16ed92d9f2655e66c
[2] https://wiki.gnuradio.org/index.php/Guided_Tutorial_GNU_Radio_in_C%2B%2B#4.3.2_Specific_block_categories

On 07/17/2017 03:31 PM, Ali wrote:

Hi to all,

I want to design my own OOT module with the following I/O:

8 inputs (length of 1000 and each element is type of float)

2 outputs (length of 1000 and each element is type of float)

2 outputs (length of 4 and each element is type of float)

I used general type block but I could not get the desired outputs. Do you suggest other type of blocks? Is there any example similar to this work that I can study on? Can you suggest a module name or a link?

Best,

Ali

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio