Class: Wiretap::Audio

Inherits:
Node
  • Object
show all
Defined in:
lib/wiretap.rb,
ext/node.cpp

Instance Attribute Summary

Attributes inherited from Node

#parent, #server

Instance Method Summary collapse

Methods inherited from Node

#==, #[], #children, #create_clip, #create_library, #create_node, #create_project, #create_reel, #destroy, #destroyed?, #find, #find_child, #hires?, #host?, #id, #id=, #import_image, #import_video, #library?, #lowres?, #ls, #meta, #metadata, #name, #node?, #project?, #reel?, #reload, #slate?, #type, #uri, #volume?

Instance Method Details

#audio? ⇒ Boolean

Returns:

  • (Boolean)

#clip? ⇒ Boolean

Returns:

  • (Boolean)

#dump(file) ⇒ Object

This is called on the node itself, but not on NodeFrames



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# File 'ext/audio_format.cpp', line 189

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

Returns the format of the audio node



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# File 'ext/node.cpp', line 320

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 



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# File 'ext/node.cpp', line 344

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_audio!(filename) ⇒ Object

Importing music is possible on Audio clips



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# File 'ext/audio_format.cpp', line 164

static VALUE wiretap_audio_import_audio_file(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 



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# File 'lib/wiretap.rb', line 241

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