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/*
* Copyright 2011,2013 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.
*/
#include "audio_registry.h"
#include <boost/foreach.hpp>
#include <gr_prefs.h>
#include <stdexcept>
#include <vector>
#include <iostream>
namespace gr {
namespace audio {
/***********************************************************************
* Create registries
**********************************************************************/
struct source_entry_t {
reg_prio_type prio;
std::string arch;
source_factory_t source;
};
static std::vector<source_entry_t> &get_source_registry(void)
{
static std::vector<source_entry_t> d_registry;
return d_registry;
}
struct sink_entry_t
{
reg_prio_type prio;
std::string arch;
sink_factory_t sink;
};
static std::vector<sink_entry_t> &get_sink_registry(void)
{
static std::vector<sink_entry_t> d_registry;
return d_registry;
}
/***********************************************************************
* Register functions
**********************************************************************/
void
register_source(reg_prio_type prio,
const std::string &arch,
source_factory_t source)
{
source_entry_t entry;
entry.prio = prio;
entry.arch = arch;
entry.source = source;
get_source_registry().push_back(entry);
}
void register_sink(reg_prio_type prio,
const std::string &arch,
sink_factory_t sink)
{
sink_entry_t entry;
entry.prio = prio;
entry.arch = arch;
entry.sink = sink;
get_sink_registry().push_back(entry);
}
/***********************************************************************
* Factory functions
**********************************************************************/
static std::string default_arch_name(void)
{
return gr_prefs::singleton()->get_string("audio", "audio_module", "auto");
}
static void do_arch_warning(const std::string &arch)
{
if(arch == "auto")
return; //no warning when arch not specified
std::cerr << "Could not find audio architecture \"" << arch
<< "\" in registry." << std::endl;
std::cerr << " Defaulting to the first available architecture..." << std::endl;
}
source::sptr
source::make(int sampling_rate,
const std::string device_name,
bool ok_to_block)
{
if(get_source_registry().empty()) {
throw std::runtime_error("no available audio source factories");
}
std::string arch = default_arch_name();
source_entry_t entry = get_source_registry().front();
BOOST_FOREACH(const source_entry_t &e, get_source_registry()) {
if(e.prio > entry.prio)
entry = e; //entry is highest prio
if(arch != e.arch)
continue; //continue when no match
return e.source(sampling_rate, device_name, ok_to_block);
}
//std::cout << "Audio source arch: " << entry.name << std::endl;
return entry.source(sampling_rate, device_name, ok_to_block);
}
sink::sptr
sink::make(int sampling_rate,
const std::string device_name,
bool ok_to_block)
{
if(get_sink_registry().empty()) {
throw std::runtime_error("no available audio sink factories");
}
std::string arch = default_arch_name();
sink_entry_t entry = get_sink_registry().front();
BOOST_FOREACH(const sink_entry_t &e, get_sink_registry()) {
if(e.prio > entry.prio)
entry = e; //entry is highest prio
if(arch != e.arch)
continue; //continue when no match
return e.sink(sampling_rate, device_name, ok_to_block);
}
do_arch_warning(arch);
//std::cout << "Audio sink arch: " << entry.name << std::endl;
return entry.sink(sampling_rate, device_name, ok_to_block);
}
} /* namespace audio */
} /* namespace gr */
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