Update README to include ADTS and AAC elements

Readme.md

@@ -106,6 +106,22 @@ Currently not a lot of elements are implemented, but these here are:
 - What it does: Takes MP3 frames from demuxer and decodes them to 16 Bit audio samples
 - Dependencies: modified `libmad` in `deps/mp3`
 
+### Demuxer: ADTS
+
+- Include: `audio_demuxer_adts.h`
+- Create: `audio_demuxer_adts();`
+- What it does: Finds sync marker in input data stream and assembles complete AAC Frames to be emitted to decoder
+  
+### Decoder: AAC
+
+- Include: `audio_decoder_aac.h`
+- Create: `audio_decoder_aac();`
+- What it does: Takes AAC frames from demuxer and decodes them to 16 Bit audio samples
+- Dependencies: modified `libfaad2` in `deps/aac`
+
+You can configure the AAC decoder and disable for example HE-AAC (called SBR there) by editing
+`config.h` in `deps/aac`.
+
 ### Filter: Resample
 
 - Include: `audio_filter_resample.h`
@@ -198,7 +214,6 @@ A list of filters, demuxers and decoders that are planned to be implemented in t
 
 - Demuxer: ISO MPEG 4 Containers (mp4/mov)
 - Demuxer: OGG (for Vorbis and Opus)
-- Decoder: AAC
 - Decoder: FLAC
 - Decoder: OPUS
 - Decoder: Vorbis

audio/deps/aac/config.h

@@ -29,7 +29,7 @@
 /* Allow decoding of Digital Radio Mondiale (DRM) */
 #undef DRM_SUPPORT
 
-/* Define DISABLE_SBR if you want to disable SBR decoding. */
+/* Define DISABLE_SBR if you want to disable SBR decoding. (HE-AAC) */
 #undef DISABLE_SBR
 
 /* Define SBR_LOW_POWER if you want only low power SBR decoding without PS. */