Dear Sir, Is this a good alternative? gr_make_io_signature2 (2, 2, sizeof(float), sizeof(double))
http://stackoverflow.com/questions/14347626/how-to-define-a-block-with-2-inputs Is this considered a correct answer? http://lists.gnu.org/archive/html/discuss-gnuradio/2013-01/msg00193.html Regards. On Thu, Jan 16, 2014 at 4:14 PM, Marcus Müller <mar...@hostalia.de> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi Activecat, > > you're right. Method calls (or function calls in general) such us > push_back can only take place in functions. That's why constructors > exist! Please refer to your favourite C++ literature for more > information. As you understood correctly, this is a C++ problem, and > not really GR-related. > Your code won't compile even after moving these calls into a function, > because you yet have to replace the <+ +> placeholders. > > Then: Working in namespace gr::howto is really deprecated. To get a > working, correctly named module infrastructure fitting your > installation of GR (which hopefully is either v3.6.5 or 3.7.X), please > use gr_modtool. > > > Greetings, > Marcus > > > > On 16.01.2014 08:46, Activecat wrote: > > Dear Sir, > > > > Below code will produce compilation error: 'input_sizes' does not > > name a type. This is because input_sizes must be assigned inside a > > context of a function in c++, right ? > > > > std::vector<int> input_sizes; > > input_sizes.push_back(sizeof(float)); > > input_sizes.push_back(sizeof(double)); gr_sync_block("my block", > > gr_make_io_signaturev(2, 2, input_sizes), gr_make_io_signature(1, > > 1, sizeof(float))) > > > > Source: > > > http://gnuradio.org/redmine/projects/gnuradio/wiki/BlocksCodingGuide#IO-signatures > > > > > > > > My code (which produce error) is below. > > > > [code] /* -*- c++ -*- */ > > > > #ifdef HAVE_CONFIG_H #include "config.h" #endif > > > > #include <gr_io_signature.h> #include <vector> #include <complex> > > #include "sample_and_hold_cc_impl.h" > > > > namespace gr { namespace howto { > > > > sample_and_hold_cc::sptr sample_and_hold_cc::make() { return > > gnuradio::get_initial_sptr (new sample_and_hold_cc_impl()); } > > > > /* * The private constructor */ > > > > std::vector <int> xx; xx.push_back(25); xx.push_back( sizeof( float > > ) ); xx.push_back( sizeof( std::complex<float> ) ); > > > > sample_and_hold_cc_impl::sample_and_hold_cc_impl() : > > gr_sync_block("sample_and_hold_cc", > > gr_make_io_signature(<+MIN_IN+>, <+MAX_IN+>, sizeof(<+ITYPE+>)), > > gr_make_io_signature(<+MIN_OUT+>, <+MAX_OUT+>, sizeof(<+OTYPE+>))) > > {} > > > > /* * Our virtual destructor. */ > > sample_and_hold_cc_impl::~sample_and_hold_cc_impl() { } > > > > int sample_and_hold_cc_impl::work(int noutput_items, > > gr_vector_const_void_star &input_items, gr_vector_void_star > > &output_items) { const <+ITYPE+> *in = (const <+ITYPE+> *) > > input_items[0]; <+OTYPE+> *out = (<+OTYPE+> *) output_items[0]; > > > > // Do <+signal processing+> > > > > // Tell runtime system how many output items we produced. return > > noutput_items; } > > > > } /* namespace howto */ } /* namespace gr */ [/code] > > > > > > > > _______________________________________________ Discuss-gnuradio > > mailing list Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1 > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iQEcBAEBAgAGBQJS15T5AAoJEAFxB7BbsDrLV2MH/2/h8v1nkK+80GrwJCzRDJkG > cb3qh3FJ890Xp0uZfj0RX+Gpv90wPas5Xia2KAb76QUOzS00J1M88vTG6kDYUaa1 > R0Ak4m2S2Ehc1ir1AvZ0z0yZi4umKHAdD8mcCjPDSC05+Qq04QtjzfMtjFNyIMXV > 872n9G0JBllRyfUlC2lRPMyCkRVSSLGfzLkShu25rlm4WImdfi+0uHHjhDjTAEV6 > DwWm/5JuO0wtzzx3w7kKx0kD5COMUmsBZuWUjokcB1gr7MUKA2OKa1PdIa1a8t80 > D1L+6S3Ax7m2LRVl8qJK4MqrvSKzDbzJLdqpPUHZjhim0m3r/Gp5etCqxSkir4M= > =5OP/ > -----END PGP SIGNATURE----- > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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