From f94d8da48e84a5809c5aa0144f8d56c5da80e85d Mon Sep 17 00:00:00 2001 From: Dimitri Stolnikov Date: Sat, 5 May 2012 23:47:00 +0200 Subject: [PATCH] rtl_tcp: add initial component files For use with the rtl_tcp utility acting as a spectrum server. The "empty" rtl_tcp= device hint might be used to connect to rtl_tcp running on local machine. --- grc/gen_osmosdr_blocks.py | 3 +- lib/CMakeLists.txt | 10 ++ lib/config.h.in | 1 + lib/osmosdr_source_c_impl.cc | 13 ++ lib/rtl_tcp/CMakeLists.txt | 36 +++++ lib/rtl_tcp/rtl_tcp_source_c.cc | 230 ++++++++++++++++++++++++++++ lib/rtl_tcp/rtl_tcp_source_c.h | 82 ++++++++++ lib/rtl_tcp/rtl_tcp_source_f.cc | 259 ++++++++++++++++++++++++++++++++ lib/rtl_tcp/rtl_tcp_source_f.h | 99 ++++++++++++ 9 files changed, 732 insertions(+), 1 deletion(-) create mode 100644 lib/rtl_tcp/CMakeLists.txt create mode 100644 lib/rtl_tcp/rtl_tcp_source_c.cc create mode 100644 lib/rtl_tcp/rtl_tcp_source_c.h create mode 100644 lib/rtl_tcp/rtl_tcp_source_f.cc create mode 100644 lib/rtl_tcp/rtl_tcp_source_f.h diff --git a/grc/gen_osmosdr_blocks.py b/grc/gen_osmosdr_blocks.py index 5c831c2..595fd17 100644 --- a/grc/gen_osmosdr_blocks.py +++ b/grc/gen_osmosdr_blocks.py @@ -112,9 +112,10 @@ The device argument is a delimited string used to locate devices on your system. Use the device id or name (if applicable) to specify a certain device or list of devices. If left blank, the first device found will be used. -Examples: +Examples (some arguments may be optional): fcd=0 rtl=0,rtl_xtal=28.80001e6,tuner_xtal=26e6,buffers=64 ... + rtl_tcp=host=127.0.0.1,port=1234,eof=false,wait=true,psize=16384 uhd=0|name,mcr=52e6,nchan=2,subdev='\\\\'B:0 A:0'\\\\' ... osmosdr=0|name,mcr=64e6,nchan=5,port=/dev/ttyUSB0 ... file=/path/to/file.ext,freq=428e6,rate=1e6,repeat=true,throttle=true ... diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt index 4cd7fcc..6b1846d 100644 --- a/lib/CMakeLists.txt +++ b/lib/CMakeLists.txt @@ -86,6 +86,16 @@ if(ENABLE_RTL) GR_INCLUDE_SUBDIRECTORY(rtl) endif(ENABLE_RTL) +######################################################################## +# Setup RTL_TCP component +######################################################################## +include(GrComponent) +GR_REGISTER_COMPONENT("Osmocom RTLSDR TCP Client" ENABLE_RTL_TCP GNURADIO_CORE_FOUND) + +if(ENABLE_RTL_TCP) +GR_INCLUDE_SUBDIRECTORY(rtl_tcp) +endif(ENABLE_RTL_TCP) + ######################################################################## # Setup UHD component ######################################################################## diff --git a/lib/config.h.in b/lib/config.h.in index c6dc12d..f48ee77 100644 --- a/lib/config.h.in +++ b/lib/config.h.in @@ -5,6 +5,7 @@ #cmakedefine ENABLE_FCD #cmakedefine ENABLE_FILE #cmakedefine ENABLE_RTL +#cmakedefine ENABLE_RTL_TCP #cmakedefine ENABLE_UHD #endif // CONFIG_H_IN diff --git a/lib/osmosdr_source_c_impl.cc b/lib/osmosdr_source_c_impl.cc index 5c32bab..bb53a05 100644 --- a/lib/osmosdr_source_c_impl.cc +++ b/lib/osmosdr_source_c_impl.cc @@ -46,6 +46,10 @@ #include #endif +#ifdef ENABLE_RTL_TCP +#include +#endif + #ifdef ENABLE_UHD #include #endif @@ -83,6 +87,7 @@ osmosdr_source_c_impl::osmosdr_source_c_impl (const std::string &args) dict.count("fcd") | dict.count("file") | dict.count("rtl") | + dict.count("rtl_tcp") | dict.count("uhd") ) { device_specified = true; @@ -159,6 +164,14 @@ osmosdr_source_c_impl::osmosdr_source_c_impl (const std::string &args) } #endif +#ifdef ENABLE_RTL_TCP + if ( dict.count("rtl_tcp") ) { + rtl_tcp_source_c_sptr src = make_rtl_tcp_source_c( arg ); + connect(src, 0, self(), channel++); + _devs.push_back( src.get() ); + } +#endif + #ifdef ENABLE_UHD if ( dict.count("uhd") ) { uhd_source_c_sptr src = make_uhd_source_c( arg ); diff --git a/lib/rtl_tcp/CMakeLists.txt b/lib/rtl_tcp/CMakeLists.txt new file mode 100644 index 0000000..df2a8e8 --- /dev/null +++ b/lib/rtl_tcp/CMakeLists.txt @@ -0,0 +1,36 @@ +# Copyright 2012 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. + +######################################################################## +# This file included, use CMake directory variables +######################################################################## + +include_directories(APPEND ${CMAKE_CURRENT_SOURCE_DIR}) + +set(rtl_tcp_srcs + ${CMAKE_CURRENT_SOURCE_DIR}/rtl_tcp_source_f.cc + ${CMAKE_CURRENT_SOURCE_DIR}/rtl_tcp_source_c.cc +) + +######################################################################## +# Append gnuradio-osmosdr library sources +######################################################################## +list(APPEND gr_osmosdr_srcs ${rtl_tcp_srcs}) +list(APPEND gr_osmosdr_libs ${GNURADIO_CORE_LIBRARIES}) + diff --git a/lib/rtl_tcp/rtl_tcp_source_c.cc b/lib/rtl_tcp/rtl_tcp_source_c.cc new file mode 100644 index 0000000..de3c730 --- /dev/null +++ b/lib/rtl_tcp/rtl_tcp_source_c.cc @@ -0,0 +1,230 @@ +/* -*- c++ -*- */ +/* + * Copyright 2012 Dimitri Stolnikov + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#include +#include +#include + +#include + +#include +#include +#include + +#include "rtl_tcp_source_c.h" + +#include + +using namespace boost::assign; + +rtl_tcp_source_c_sptr make_rtl_tcp_source_c(const std::string &args) +{ + return gnuradio::get_initial_sptr(new rtl_tcp_source_c(args)); +} + +rtl_tcp_source_c::rtl_tcp_source_c(const std::string &args) : + gr_hier_block2("rtl_tcp_source_c", + gr_make_io_signature (0, 0, 0), + gr_make_io_signature (1, 1, sizeof (gr_complex))) +{ + std::string host = "127.0.0.1"; + unsigned short port = 1234; + bool eof = false; + bool wait = true; + int payload_size = 16384; + + _freq = 0; + _rate = 0; + + dict_t dict = params_to_dict(args); + + if (dict.count("host")) + host = dict["host"]; + + if (dict.count("port")) + port = boost::lexical_cast< unsigned short >( dict["port"] ); + + if (dict.count("eof")) + eof = "true" == dict["eof"] ? true : false; + + if (dict.count("wait")) + wait = "true" == dict["wait"] ? true : false; + + if (dict.count("psize")) + payload_size = boost::lexical_cast< int >( dict["psize"] ); + + if (!host.length()) + host = "127.0.0.1"; + + if (0 == port) + port = 1234; + + if (payload_size <= 0) + payload_size = 16384; + + _src = make_rtl_tcp_source_f(sizeof(float), host.c_str(), port, payload_size, + eof, wait); + + /* rtl tcp source provides a stream of interleaved IQ floats */ + gr_deinterleave_sptr deinterleave = gr_make_deinterleave(sizeof(float)); + + /* block to convert deinterleaved floats to a complex stream */ + gr_float_to_complex_sptr f2c = gr_make_float_to_complex(1); + + connect(_src, 0, deinterleave, 0); + connect(deinterleave, 0, f2c, 0); /* I */ + connect(deinterleave, 1, f2c, 1); /* Q */ + connect(f2c, 0, self(), 0); +} + +rtl_tcp_source_c::~rtl_tcp_source_c() +{ +} + +gr_basic_block_sptr rtl_tcp_source_c::self() +{ + return gr_hier_block2::self(); +} + +std::string rtl_tcp_source_c::name() +{ + return "RTL TCP Client Source"; +} + +size_t rtl_tcp_source_c::get_num_channels( void ) +{ + return 1; +} + +osmosdr::meta_range_t rtl_tcp_source_c::get_sample_rates( void ) +{ + osmosdr::meta_range_t range; + + range += osmosdr::range_t( get_sample_rate() ); + + return range; +} + +double rtl_tcp_source_c::set_sample_rate( double rate ) +{ + return get_sample_rate(); +} + +double rtl_tcp_source_c::get_sample_rate( void ) +{ + return _rate; +} + +osmosdr::freq_range_t rtl_tcp_source_c::get_freq_range( size_t chan ) +{ + osmosdr::freq_range_t range(50e6, 2.2e6, 100); + + return range; +} + +double rtl_tcp_source_c::set_center_freq( double freq, size_t chan ) +{ + _src->set_freq( int(freq) ); + + _freq = freq; + + return get_center_freq(chan); +} + +double rtl_tcp_source_c::get_center_freq( size_t chan ) +{ + return _freq; +} + +double rtl_tcp_source_c::set_freq_corr( double ppm, size_t chan ) +{ + return get_freq_corr( chan ); +} + +double rtl_tcp_source_c::get_freq_corr( size_t chan ) +{ + return 0; +} + +std::vector rtl_tcp_source_c::get_gain_names( size_t chan ) +{ + return std::vector< std::string >(); +} + +osmosdr::gain_range_t rtl_tcp_source_c::get_gain_range( size_t chan ) +{ + osmosdr::gain_range_t range(0, 0); + + return range; +} + +osmosdr::gain_range_t rtl_tcp_source_c::get_gain_range( const std::string & name, size_t chan ) +{ + return get_gain_range( chan ); +} + +bool rtl_tcp_source_c::set_gain_mode( bool mode, size_t chan ) +{ + return get_gain_mode(chan); +} + +bool rtl_tcp_source_c::get_gain_mode( size_t chan ) +{ + return true; +} + +double rtl_tcp_source_c::set_gain( double gain, size_t chan ) +{ + return get_gain(chan); +} + +double rtl_tcp_source_c::set_gain( double gain, const std::string & name, size_t chan ) +{ + return set_gain(chan); +} + +double rtl_tcp_source_c::get_gain( size_t chan ) +{ + return 0; +} + +double rtl_tcp_source_c::get_gain( const std::string & name, size_t chan ) +{ + return get_gain(chan); +} + +std::vector< std::string > rtl_tcp_source_c::get_antennas( size_t chan ) +{ + std::vector< std::string > antennas; + + antennas += get_antenna(chan); + + return antennas; +} + +std::string rtl_tcp_source_c::set_antenna( const std::string & antenna, size_t chan ) +{ + return get_antenna(chan); +} + +std::string rtl_tcp_source_c::get_antenna( size_t chan ) +{ + return "ANT"; +} diff --git a/lib/rtl_tcp/rtl_tcp_source_c.h b/lib/rtl_tcp/rtl_tcp_source_c.h new file mode 100644 index 0000000..7545534 --- /dev/null +++ b/lib/rtl_tcp/rtl_tcp_source_c.h @@ -0,0 +1,82 @@ +/* -*- c++ -*- */ +/* + * Copyright 2012 Dimitri Stolnikov + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ +#ifndef RTL_TCP_SOURCE_C_H +#define RTL_TCP_SOURCE_C_H + +#include + +#include "osmosdr_src_iface.h" + +#include "rtl_tcp_source_f.h" + +class rtl_tcp_source_c; + +typedef boost::shared_ptr< rtl_tcp_source_c > rtl_tcp_source_c_sptr; + +rtl_tcp_source_c_sptr make_rtl_tcp_source_c( const std::string & args = "" ); + +class rtl_tcp_source_c : + public gr_hier_block2, + public osmosdr_src_iface +{ +private: + friend rtl_tcp_source_c_sptr make_rtl_tcp_source_c(const std::string &args); + + rtl_tcp_source_c(const std::string &args); + +public: + ~rtl_tcp_source_c(); + + gr_basic_block_sptr self(); + + std::string name(); + + size_t get_num_channels( void ); + + osmosdr::meta_range_t get_sample_rates( void ); + double set_sample_rate( double rate ); + double get_sample_rate( void ); + + osmosdr::freq_range_t get_freq_range( size_t chan = 0 ); + double set_center_freq( double freq, size_t chan = 0 ); + double get_center_freq( size_t chan = 0 ); + double set_freq_corr( double ppm, size_t chan = 0 ); + double get_freq_corr( size_t chan = 0 ); + + std::vector get_gain_names( size_t chan = 0 ); + osmosdr::gain_range_t get_gain_range( size_t chan = 0 ); + osmosdr::gain_range_t get_gain_range( const std::string & name, size_t chan = 0 ); + bool set_gain_mode( bool mode, size_t chan = 0 ); + bool get_gain_mode( size_t chan = 0 ); + double set_gain( double gain, size_t chan = 0 ); + double set_gain( double gain, const std::string & name, size_t chan = 0 ); + double get_gain( size_t chan = 0 ); + double get_gain( const std::string & name, size_t chan = 0 ); + + std::vector< std::string > get_antennas( size_t chan = 0 ); + std::string set_antenna( const std::string & antenna, size_t chan = 0 ); + std::string get_antenna( size_t chan = 0 ); + +private: + double _freq, _rate; + rtl_tcp_source_f_sptr _src; +}; + +#endif // RTL_TCP_SOURCE_C_H diff --git a/lib/rtl_tcp/rtl_tcp_source_f.cc b/lib/rtl_tcp/rtl_tcp_source_f.cc new file mode 100644 index 0000000..7e283fb --- /dev/null +++ b/lib/rtl_tcp/rtl_tcp_source_f.cc @@ -0,0 +1,259 @@ +/* -*- c++ -*- */ +/* + * Copyright 2012 Hoernchen + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ +//#define HAVE_WINDOWS_H + + +#include +#include +#include +#include +#include +#include + +#define USE_SELECT 1 // non-blocking receive on all platforms +#define USE_RCV_TIMEO 0 // non-blocking receive on all but Cygwin +#define SRC_VERBOSE 0 +#define SNK_VERBOSE 0 + +static int is_error( int perr ) +{ + // Compare error to posix error code; return nonzero if match. +#if defined(USING_WINSOCK) +#define ENOPROTOOPT 109 + // All codes to be checked for must be defined below + int werr = WSAGetLastError(); + switch( werr ) { + case WSAETIMEDOUT: + return( perr == EAGAIN ); + case WSAENOPROTOOPT: + return( perr == ENOPROTOOPT ); + default: + fprintf(stderr,"rtl_tcp_source_f: unknown error %d WS err %d \n", perr, werr ); + throw std::runtime_error("internal error"); + } + return 0; +#else + return( perr == errno ); +#endif +} + +static void report_error( const char *msg1, const char *msg2 ) +{ + // Deal with errors, both posix and winsock +#if defined(USING_WINSOCK) + int werr = WSAGetLastError(); + fprintf(stderr, "%s: winsock error %d\n", msg1, werr ); +#else + perror(msg1); +#endif + if( msg2 != NULL ) + throw std::runtime_error(msg2); + return; +} + +rtl_tcp_source_f::rtl_tcp_source_f(size_t itemsize, + const char *host, + unsigned short port, + int payload_size, + bool eof, + bool wait) + : gr_sync_block ("rtl_tcp_source_f", + gr_make_io_signature(0, 0, 0), + gr_make_io_signature(1, 1, sizeof(float))), + d_itemsize(itemsize), + d_payload_size(payload_size), + d_eof(eof), + d_wait(wait), + d_socket(-1), + d_residual(0), + d_temp_offset(0), + curr_freq(0) +{ + int ret = 0; + struct sockaddr_in cliaddr; + socklen_t clilen; +#if defined(USING_WINSOCK) // for Windows (with MinGW) + // initialize winsock DLL + WSADATA wsaData; + int iResult = WSAStartup( MAKEWORD(2,2), &wsaData ); + if( iResult != NO_ERROR ) { + report_error( "rtl_tcp_source_f WSAStartup", "can't open socket" ); + } +#endif + + // Set up the address stucture for the source address and port numbers + // Get the source IP address from the host name + struct addrinfo *ip_src; // store the source IP address to use + struct addrinfo hints; + memset( (void*)&hints, 0, sizeof(hints) ); + hints.ai_family = AF_INET; + hints.ai_socktype = SOCK_STREAM; + hints.ai_protocol = IPPROTO_TCP; + hints.ai_flags = AI_PASSIVE; + char port_str[12]; + sprintf( port_str, "%d", port ); + + // FIXME leaks if report_error throws below + ret = getaddrinfo( host, port_str, &hints, &ip_src ); + if( ret != 0 ) + report_error("rtl_tcp_source_f/getaddrinfo", + "can't initialize source socket" ); + + // FIXME leaks if report_error throws below + d_temp_buff = new unsigned char[d_payload_size]; // allow it to hold up to payload_size bytes + d_LUT= new float[0xff+1]; + for(int i=0; i <=(0xff);++i){ + d_LUT[i] = (((float)(i&0xff))-127.5f)*(1.0f/128.0f); + } + // create socket + d_socket = socket(ip_src->ai_family, ip_src->ai_socktype, + ip_src->ai_protocol); + if(d_socket == -1) { + report_error("socket open","can't open socket"); + } + + // Turn on reuse address + int opt_val = 1; + if(setsockopt(d_socket, SOL_SOCKET, SO_REUSEADDR, (optval_t)&opt_val, sizeof(int)) == -1) { + report_error("SO_REUSEADDR","can't set socket option SO_REUSEADDR"); + } + + // Don't wait when shutting down + linger lngr; + lngr.l_onoff = 1; + lngr.l_linger = 0; + if(setsockopt(d_socket, SOL_SOCKET, SO_LINGER, (optval_t)&lngr, sizeof(linger)) == -1) { + if( !is_error(ENOPROTOOPT) ) { // no SO_LINGER for SOCK_DGRAM on Windows + report_error("SO_LINGER","can't set socket option SO_LINGER"); + } + } + +#if USE_RCV_TIMEO + // Set a timeout on the receive function to not block indefinitely + // This value can (and probably should) be changed + // Ignored on Cygwin +#if defined(USING_WINSOCK) + DWORD timeout = 1000; // milliseconds +#else + timeval timeout; + timeout.tv_sec = 1; + timeout.tv_usec = 0; +#endif + if(setsockopt(d_socket, SOL_SOCKET, SO_RCVTIMEO, (optval_t)&timeout, sizeof(timeout)) == -1) { + report_error("SO_RCVTIMEO","can't set socket option SO_RCVTIMEO"); + } +#endif // USE_RCV_TIMEO + + + while(connect(d_socket, ip_src->ai_addr, ip_src->ai_addrlen) != 0); + freeaddrinfo(ip_src); + + int flag = 1; + setsockopt(d_socket, IPPROTO_TCP, TCP_NODELAY, (char *)&flag,sizeof(flag)); +} + +rtl_tcp_source_f_sptr make_rtl_tcp_source_f (size_t itemsize, + const char *ipaddr, + unsigned short port, + int payload_size, + bool eof, + bool wait) +{ + return gnuradio::get_initial_sptr(new rtl_tcp_source_f ( + itemsize, + ipaddr, + port, + payload_size, + eof, + wait)); +} + +rtl_tcp_source_f::~rtl_tcp_source_f () +{ + delete [] d_temp_buff; + + if (d_socket != -1){ + shutdown(d_socket, SHUT_RDWR); +#if defined(USING_WINSOCK) + closesocket(d_socket); +#else + ::close(d_socket); +#endif + d_socket = -1; + } + +#if defined(USING_WINSOCK) // for Windows (with MinGW) + // free winsock resources + WSACleanup(); +#endif +} + +int rtl_tcp_source_f::work (int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + float *out = (float *) output_items[0]; + ssize_t r=0, nbytes=0, bytes_received=0; + ssize_t total_bytes = (ssize_t)(d_itemsize*noutput_items); + + int bytesleft = noutput_items; + int index = 0; + int receivedbytes = 0; + while(bytesleft > 0) { + receivedbytes = recv(d_socket, (char*)&d_temp_buff[index], bytesleft, 0); + + if(receivedbytes == -1 && !is_error(EAGAIN)){ + fprintf(stderr, "socket error\n"); + return -1; + } + bytesleft -= receivedbytes; + index += receivedbytes; + } + r = noutput_items; + + for(int i=0; i + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef RTL_TCP_SOURCE_F_H +#define RTL_TCP_SOURCE_F_H + +#include + +#include +#include + +#if defined(_WIN32) +// if not posix, assume winsock +#pragma comment(lib, "ws2_32.lib") +#define USING_WINSOCK +#include +#include +#define SHUT_RDWR 2 +typedef char* optval_t; +#else +#include +#include +#include +#include +#include +#include +typedef void* optval_t; +#endif + +#define ssize_t int + +class rtl_tcp_source_f; +typedef boost::shared_ptr rtl_tcp_source_f_sptr; + +OSMOSDR_API rtl_tcp_source_f_sptr make_rtl_tcp_source_f ( + size_t itemsize, + const char *host, + unsigned short port, + int payload_size, + bool eof, + bool wait); + +class OSMOSDR_API rtl_tcp_source_f : public gr_sync_block +{ +private: + size_t d_itemsize; + int d_payload_size; // maximum transmission unit (packet length) + bool d_eof; // zero-length packet is EOF + bool d_wait; // wait if data if not immediately available + int d_socket; // handle to socket + unsigned char *d_temp_buff; // hold buffer between calls + ssize_t d_residual; // hold information about number of bytes stored in the temp buffer + size_t d_temp_offset; // point to temp buffer location offset + int curr_freq; + float *d_LUT; + + private: + rtl_tcp_source_f(size_t itemsize, const char *host, + unsigned short port, int payload_size, bool eof, bool wait); + + // The friend declaration allows make_source_c to + // access the private constructor. + friend OSMOSDR_API rtl_tcp_source_f_sptr make_rtl_tcp_source_f ( + size_t itemsize, + const char *host, + unsigned short port, + int payload_size, + bool eof, + bool wait); + + public: + ~rtl_tcp_source_f(); + + int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + + void set_freq(int freq); +}; + + +#endif /* RTL_TCP_SOURCE_F_H */