Class: Wiretap::Audio

Inherits:

Node

• Object
• Node
• Wiretap::Audio

Defined in:

lib/wiretap.rb,
ext/node.cpp

Instance Attribute Summary

Attributes inherited from Node

#parent, #server

Instance Method Summary

• #audio? ⇒ Boolean
• #clip? ⇒ Boolean
• #dump(file) ⇒ Object

  This is called on node.

• #format ⇒ Object
• #frames ⇒ Object
• #import_music(filename) ⇒ Object
• #to_s ⇒ Object

Methods inherited from Node

#[], #children, #create_library, #create_project, #create_reel, #destroy, #destroy!, #find, #find_child, #host?, #id, #id=, #import_image, #import_video, #library?, #ls, #metadata, #name, #project?, #reel?, #reload, #type, #uri, #volume?

Instance Method Details

#audio? ⇒ Boolean

#clip? ⇒ Boolean

#dump(file) ⇒ Object

This is called on node. Not on NodeFrames

# File 'ext/audio_format.cpp', line 186

static VALUE wiretap_audio_dump(VALUE self, VALUE file) {
  WireTapNodeHandle* node;
  Data_Get_Struct(self, WireTapNodeHandle, node);
  
  WireTapAudioFormat format;
  RUN(node->getClipFormat(format));

  int num;
  NODERUN_E(node, node->getNumFrames(num));
  if(num <= 0) {
    rb_warn("No frames in the audio stream");
    return Qnil;
  }

  std::auto_ptr<unsigned char> frame(new unsigned char[format.frameBufferSize() * num]);
  for(int i = 0; i < num; i++) {
    if(!node->readFrame(i, frame.get() + i*format.frameBufferSize(), format.frameBufferSize())) {
      frame.release();
      NODERUN_E(node, false);
    }
  }

  wiretap_write_audio_frame(format.numSamples(), int(format.sampleRate()), 
    format.bitsPerSample(), rb_intern(format.formatTag()), frame.get(), CSTR(file));
  return self;
}

#format ⇒ Object

# File 'ext/node.cpp', line 312

static VALUE wiretap_audio_format(VALUE self) {
  Check_Node_Alive(self);
  
  WireTapNodeHandle* node;
  Data_Get_Struct(self, WireTapNodeHandle, node);
  WireTapAudioFormat audio_format;
  NODERUN_E(node, node->getClipFormat(audio_format));
  VALUE audioformat = Data_Wrap_Struct(cAudioFormat, 0, wiretap_format_free, new WireTapAudioFormat(audio_format));
  rb_iv_set(audioformat, "@node", self);
  return audioformat;
}

#frames ⇒ Object

# File 'ext/node.cpp', line 336

static VALUE wiretap_audio_frames(VALUE self) {
  Check_Node_Alive(self);
  
  WireTapNodeHandle* node;
  Data_Get_Struct(self, WireTapNodeHandle, node);
  VALUE audioframes = Data_Wrap_Struct(cAudioFrames, 0, node_leave, node);
  rb_iv_set(audioframes, "@node", self);
  return audioframes;
}

#import_music(filename) ⇒ Object

# File 'ext/audio_format.cpp', line 161

static VALUE wiretap_audio_import_music(VALUE self, VALUE filename) {
  Check_Type(filename, T_STRING);
  
  SF_INFO sfinfo;
  SNDFILE* snd = sf_open(CSTR(filename), SFM_READ, &sfinfo);


  std::auto_ptr<short> frame(new short[sfinfo.frames]);
  sf_count_t read_frames = sf_read_short(snd, frame.get(), sfinfo.frames);
  if(read_frames != sfinfo.frames) {
    rb_warn("Waited to read %lld audio frames, got only %lld", sfinfo.frames, read_frames);
    sf_close(snd);
    return Qnil;
  }
  sf_close(snd);
  
  WireTapNodeHandle* node;
  Data_Get_Struct(self, WireTapNodeHandle, node);
  NODERUN_E(node, node->setNumFrames(1));
  NODERUN_E(node, node->writeFrame(0, frame.get(), sfinfo.frames*2));
  return self;
}

#to_s ⇒ Object

# File 'lib/wiretap.rb', line 208

def to_s
  "#<#{self.class.to_s} '#{self.name}'>"
end