1 files changed, 153 insertions, 0 deletions
diff --git a/gr-audio/lib/gr_audio_registry.cc b/gr-audio/lib/gr_audio_registry.cc
new file mode 100644
index 000000000..c47db8289
--- /dev/null
+++ b/gr-audio/lib/gr_audio_registry.cc
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2011 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 "gr_audio_registry.h"
+#include <boost/foreach.hpp>
+#include <gr_prefs.h>
+#include <stdexcept>
+#include <vector>
+#include <iostream>
+
+/***********************************************************************
+ * 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> _registry;
+    return _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> _registry;
+    return _registry;
+}
+
+/***********************************************************************
+ * Register functions
+ **********************************************************************/
+void audio_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 audio_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;
+}
+
+audio_source::sptr audio_make_source(
+    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);
+}
+
+audio_sink::sptr audio_make_sink(
+    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);
+}
+
+/***********************************************************************
+ * Default constructors
+ **********************************************************************/
+#include <gr_io_signature.h>
+
+audio_sink::audio_sink(
+        const std::string &name,
+        gr_io_signature_sptr insig,
+        gr_io_signature_sptr outsig
+):
+    gr_sync_block(name, insig, outsig)
+{}
+
+audio_source::audio_source(
+        const std::string &name,
+        gr_io_signature_sptr insig,
+        gr_io_signature_sptr outsig
+):
+    gr_sync_block(name, insig, outsig)
+{}