1 files changed, 154 insertions, 0 deletions
diff --git a/gr-audio/lib/audio_registry.cc b/gr-audio/lib/audio_registry.cc
new file mode 100644
index 0000000000..71f9099a63
--- /dev/null
+++ b/gr-audio/lib/audio_registry.cc
@@ -0,0 +1,154 @@
+/*
+ * 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 */