Class: Audio::MPEG::Decoder

Inherits:
Object
  • Object
show all
Defined in:
ext/icanhasaudio.c,
lib/icanhasaudio/mpeg.rb

Constant Summary collapse

VERSION =

VERSION = ‘0.0.2’

rb_str_new2("0.0.2")

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize {|_self| ... } ⇒ Decoder

Returns a new instance of Decoder.

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/icanhasaudio/mpeg.rb', line 7

def initialize
  @bits = 16
  yield self if block_given?
end

Instance Attribute Details

#bitrate ⇒ Object (readonly)

Returns the value of attribute bitrate.



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# File 'lib/icanhasaudio/mpeg.rb', line 2

def bitrate
  @bitrate
end

#bits ⇒ Object

Number of bits, 8 or 16



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# File 'lib/icanhasaudio/mpeg.rb', line 5

def bits
  @bits
end

#framesize ⇒ Object (readonly)

Returns the value of attribute framesize.



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# File 'lib/icanhasaudio/mpeg.rb', line 2

def framesize
  @framesize
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/icanhasaudio/mpeg.rb', line 2

def mode
  @mode
end

#mode_ext ⇒ Object (readonly)

Returns the value of attribute mode_ext.



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# File 'lib/icanhasaudio/mpeg.rb', line 2

def mode_ext
  @mode_ext
end

#samplerate ⇒ Object (readonly)

Returns the value of attribute samplerate.



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# File 'lib/icanhasaudio/mpeg.rb', line 2

def samplerate
  @samplerate
end

#stereo ⇒ Object (readonly)

Returns the value of attribute stereo.



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# File 'lib/icanhasaudio/mpeg.rb', line 2

def stereo
  @stereo
end

Class Method Details

.Audio::MPEG::Decoder.lame_version ⇒ Object

Returns the version of lame you are using.



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# File 'ext/icanhasaudio.c', line 61

static VALUE method_lame_version(VALUE klass) {
  const char * version = get_lame_version();
  return rb_str_new(version, strlen(version));
}

Instance Method Details

#decode(input_io, output_io) ⇒ Object

Decode the input IO and write it to the output IO.



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# File 'ext/icanhasaudio.c', line 138

static VALUE method_lame_decode(VALUE self, VALUE file, VALUE outf) {
  mp3data_struct mp3data;
  lame_global_flags * gfp;

  memset(&mp3data, 0, sizeof(mp3data_struct));
  lame_decode_initfile(file, &mp3data);

  Data_Get_Struct (self, lame_global_flags, gfp);

  rb_iv_set(self, "@stereo", INT2NUM(mp3data.stereo));
  rb_iv_set(self, "@samplerate", INT2NUM(mp3data.samplerate));
  rb_iv_set(self, "@bitrate", INT2NUM(mp3data.bitrate));
  rb_iv_set(self, "@mode", INT2NUM(mp3data.mode));
  rb_iv_set(self, "@mode_ext", INT2NUM(mp3data.mode_ext));
  rb_iv_set(self, "@framesize", INT2NUM(mp3data.framesize));

  lame_decoder(self, file, outf, &mp3data);

  return Qnil;
}