Performance improvements

README.rdoc

@@ -28,7 +28,7 @@ What this library can do:
 == USAGE:
 
     # Create new encoder with a sample rate of 48 kHz, a frame size of 480 bytes and 1 channel
-    encoder = Celt::Encoder.new 48000, 480, 1
+    encoder = Celt::Encoder.new 48000, 480, 1, [60000 / 800, 127].min
     # Set the prediction request to 0
     encoder.prediction_request = 0
     # Set the VBR rate to 60,000
@@ -38,8 +38,7 @@ What this library can do:
     encoder.bitstream_version
 
     # Encode some raw audio
-    compressed_size = [@encoder.vbr_rate / 800, 127].min
-    encoded = encoder.encode(raw_audio, compressed_size)
+    encoded = encoder.encode raw_audio
 
     # Safely destroy encoder
     encoder.destroy

lib/celt-ruby/encoder.rb

@@ -3,16 +3,20 @@ class Encoder
     attr_reader :sample_rate, :frame_size, :channels,
                 :prediction_request, :vbr_rate
 
-    def initialize(sample_rate, frame_size, channels)
+    def initialize(sample_rate, frame_size, channels, size)
       @sample_rate = sample_rate
       @frame_size = frame_size
       @channels = channels
-
+      @size = size
+      @out = FFI::MemoryPointer.new :char, @size + 1
+      @buf = FFI::MemoryPointer.new :char, @frame_size * 2 + 1
       @mode = Celt.celt_mode_create sample_rate, frame_size, nil
       @encoder = Celt.celt_encoder_create @mode, channels, nil
     end
 
     def destroy
+      @out.free
+      @buf.free
       Celt.celt_encoder_destroy @encoder
       Celt.celt_mode_destroy @mode
     end
@@ -37,12 +41,10 @@ def vbr_rate=(value)
       Celt.celt_encoder_ctl @encoder, Celt::Constants::CELT_SET_VBR_RATE_REQUEST, :pointer, v_ptr
     end
 
-    def encode(data, size)
-      out = FFI::MemoryPointer.new :char, data.size + 1
-      buf = FFI::MemoryPointer.new :char, data.size + 1
-      buf.put_string 0, data
-      len = Celt.celt_encode @encoder, buf, nil, out, size
-      out.read_string_length len
+    def encode(data)
+      @buf.put_string 0, data
+      len = Celt.celt_encode @encoder, @buf, nil, @out, @size
+      @out.read_string len
     end
   end
 end