First version split into asnes and bsnes.

ruby/audio/ao.cpp

@@ -0,0 +1,94 @@
+/*
+  audio.ao (2008-06-01)
+  authors: Nach, RedDwarf
+*/
+
+#include <ao/ao.h>
+
+namespace ruby {
+
+class pAudioAO {
+public:
+  int driver_id;
+  ao_sample_format driver_format;
+  ao_device *audio_device;
+
+  struct {
+    unsigned frequency;
+  } settings;
+
+  bool cap(const string& name) {
+    if(name == Audio::Frequency) return true;
+    return false;
+  }
+
+  any get(const string& name) {
+    if(name == Audio::Frequency) return settings.frequency;
+    return false;
+  }
+
+  bool set(const string& name, const any& value) {
+    if(name == Audio::Frequency) {
+      settings.frequency = any_cast<unsigned>(value);
+      if(audio_device) init();
+      return true;
+    }
+
+    return false;
+  }
+
+  void sample(uint16_t l_sample, uint16_t r_sample) {
+    uint32_t samp = (l_sample << 0) + (r_sample << 16);
+    ao_play(audio_device, (char*)&samp, 4); //This may need to be byte swapped for Big Endian
+  }
+
+  void clear() {
+  }
+
+  bool init() {
+    term();
+
+    driver_id = ao_default_driver_id(); //ao_driver_id((const char*)driver)
+    if(driver_id < 0) return false;
+
+    driver_format.bits = 16;
+    driver_format.channels = 2;
+    driver_format.rate = settings.frequency;
+    driver_format.byte_format = AO_FMT_LITTLE;
+
+    ao_option *options = 0;
+    ao_info *di = ao_driver_info(driver_id);
+    if(!di) return false;
+    if(!strcmp(di->short_name, "alsa")) {
+      ao_append_option(&options, "buffer_time", "100000"); //100ms latency (default was 500ms)
+    }
+
+    audio_device = ao_open_live(driver_id, &driver_format, options);
+    if(!audio_device) return false;
+
+    return true;
+  }
+
+  void term() {
+    if(audio_device) {
+      ao_close(audio_device);
+      audio_device = 0;
+    }
+  }
+
+  pAudioAO() {
+    audio_device = 0;
+    ao_initialize();
+
+    settings.frequency = 22050;
+  }
+
+  ~pAudioAO() {
+    term();
+  //ao_shutdown(); //FIXME: this is causing a segfault for some reason when called ...
+  }
+};
+
+DeclareAudio(AO)
+
+};