refactor: rename buffer_size to frame_size in decoder

README.md

@@ -23,7 +23,7 @@ Sample code from [OpusTest.java](https://github.com/plasmoapp/opus-jni-rust/blob
 short[] rawSamples = new short[960];
 
 // Creates a new encoder in mono with 1024 mtu size and application mode VOIP
-OpusEncoder encoder = OpusEncoder.create(48_000, false, 960, OpusMode.VOIP);
+OpusEncoder encoder = OpusEncoder.create(48_000, false, 1024, OpusMode.VOIP);
 
 // Sets encoder bitrate to 50k
 encoder.setBitrate(50_000);
@@ -41,7 +41,7 @@ encoder.close();
  * Decoding
  */
 
-// Creates a new decoder in mono with 960 buffer size
+// Creates a new decoder in mono with 960 frame size
 OpusDecoder decoder = OpusDecoder.create(48_000, false, 960);
 
 // Decodes the encoded audio data into an audio samples

rust/src/decoder.rs

@@ -13,9 +13,9 @@ pub extern "system" fn Java_com_plasmoverse_opus_OpusDecoder_createNative(
     _class: JClass,
     sample_rate: jint,
     stereo: jboolean,
-    buffer_size: jint
+    frame_size: jint
 ) -> jlong {
-    match create_decoder(sample_rate, stereo, buffer_size) {
+    match create_decoder(sample_rate, stereo, frame_size) {
         Ok(pointer) => pointer,
         Err(exception) => {
             env.throw_new_exception(exception);
@@ -69,7 +69,7 @@ pub unsafe extern "system" fn Java_com_plasmoverse_opus_OpusDecoder_decodeNative
 fn create_decoder(
     sample_rate: jint,
     stereo: jboolean,
-    buffer_size: jint
+    frame_size: jint
 ) -> Result<jlong, JavaException> {
     let channels = match stereo {
         1u8 => Channels::Stereo,
@@ -82,7 +82,7 @@ fn create_decoder(
     let decoder_container = DecoderContainer {
         decoder,
         channels,
-        buffer_size,
+        frame_size,
     };
 
     Ok(decoder_container.into_jlong_pointer())
@@ -137,7 +137,7 @@ unsafe fn decoder_decode<'local>(
             .err_into_opus_exception("Failed to convert byte array to rust vec".into())?
     };
 
-    let mut decoded = vec![0i16; container.buffer_size as usize * container.channels as usize];
+    let mut decoded = vec![0i16; container.frame_size as usize * container.channels as usize];
 
     let result = container.decoder.decode(&encoded, &mut decoded, false)
         .err_into_opus_exception("Failed to decode audio".into())?;

rust/src/decoder_container.rs

@@ -5,7 +5,7 @@ use crate::util::pointer::JavaPointers;
 pub struct DecoderContainer {
     pub decoder: Decoder,
     pub channels: Channels,
-    pub buffer_size: i32
+    pub frame_size: i32
 }
 
 impl JavaPointers<DecoderContainer> for DecoderContainer {

src/main/java/com/plasmoverse/opus/OpusDecoder.java

@@ -9,21 +9,21 @@ public final class OpusDecoder {
      *
      * @param sampleRate The sample rate of the audio data.
      * @param stereo {@code true} if the audio is in stereo format, {@code false} for mono.
-     * @param bufferSize Size of the buffer for processing audio.
+     * @param frameSize Size of the frame.
      * @throws IOException If an error occurs while extracting the native library.
      * @throws UnsatisfiedLinkError If the native libraries fail to load.
      * @throws OpusException If the opus decoder fail to initialize.
      * @return An instance of the opus decoder.
      */
-    public static OpusDecoder create(int sampleRate, boolean stereo, int bufferSize) throws IOException, OpusException {
+    public static OpusDecoder create(int sampleRate, boolean stereo, int frameSize) throws IOException, OpusException {
         OpusLibrary.load();
 
-        long pointer = createNative(sampleRate, stereo, bufferSize);
+        long pointer = createNative(sampleRate, stereo, frameSize);
 
         return new OpusDecoder(pointer);
     }
 
-    private static native long createNative(int sampleRate, boolean stereo, int mtuSize);
+    private static native long createNative(int sampleRate, boolean stereo, int frameSize);
 
 
     private final long pointer;

src/test/java/com/plasmoverse/opus/OpusTest.java

@@ -30,8 +30,7 @@ public void decode() throws Exception {
          * Decoding
          */
 
-        // Creates a new decoder in mono with 960 buffer size
-        // buffer_size should be frame_size * channels
+        // Creates a new decoder in mono with 960 frame size
         OpusDecoder decoder = OpusDecoder.create(48_000, false, 960);
 
         // Decodes the encoded audio data into an audio samples