Re: [Discuss-gnuradio] file sink issue

[Ben Reynwar]

It depends what you mean by readable format.  If you just want to get
an idea of the values and the file isn't to big then do:

from gnuradio import gr
src = gr.file_source(1, "the_file_name")
snk = gr.vector_sink_b()
tb = gr.top_block()
tb.connect(src, snk)
tb.run()
# The bytes will be presented as a list of integers in python.
data = snk.data()
print(data)

On Tue, May 22, 2012 at 9:47 PM, ambily joseph <address@hidden> wrote:
> Sir
>  My file sink input type in 'bytes'...Smthng being written to that
> folder..nd size of that file is increasing,,but when i try to open it its
> octet-stream file...How can i make into a readable format?
>
>
> On Mon, May 21, 2012 at 7:44 PM, Ben Reynwar <address@hidden> wrote:
>>
>> On Mon, May 21, 2012 at 12:19 AM, ambily joseph <address@hidden>
>> wrote:
>> > Sir
>> >
>> > I am trying to build an SID SDR receiver,,where i require a file sink...
>> > When i run my flow graph,,i get a file of format octet-stream being
>> > written
>> > into my computer.
>> > But i am not able to access or open my dat octet-stream file.
>> > Sir may i know how can i access the data being written into it?
>> >
>> > Thank you
>> >
>> > _______________________________________________
>> > Discuss-gnuradio mailing list
>> > address@hidden
>> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> >
>> The file sink is just a dump of the data stream. If the data stream
>> content was simple bytes then the content of the file is
>> straightforward. If the data stream contained complex numbers then the
>> file will contain a list of complex numbers where each complex number
>> is given by two floats and each float by (usually) 4 bytes.
>>
>> See the files gnuradio/gnuradio-core/src/lib/io/gr_file_sink.cc and
>> gr_file_source.cc for the implementations of the gnuradio file reading
>> and writing blocks.
>>
>> You could also use python and gnuradio to convert the files into some
>> other format.
>>
>> from gnuradio import gr
>> # Assuming the data stream was complex numbers.
>> src = gr.file_source(gr.sizeof_gr_complex, "the_file_name")
>> snk = gr.vector_sink_c()
>> tb = gr.top_block()
>> tb.connect(src, snk)
>> tb.run()
>> # The complex numbers are then accessible as a python list.
>> data = snk.data()
>>
>> Ben
>
>