Handle AOT specific channels. Bump to v0.18.2

README.md

@@ -15,7 +15,7 @@ The package can be installed by adding `membrane_aac_plugin` to your list of dep
 ```elixir
 def deps do
   [
-	{:membrane_aac_plugin, "~> 0.18.1"}
+	{:membrane_aac_plugin, "~> 0.18.2"}
   ]
 end
 ```

lib/membrane/aac/parser/audio_specific_config.ex

@@ -23,7 +23,7 @@ defmodule Membrane.AAC.Parser.AudioSpecificConfig do
       depends_on_core_coder::1, extension_flag::1>>
   end
 
-  @spec parse_audio_specific_config(binary()) :: AAC.t()
+  @spec parse_audio_specific_config(binary()) :: map()
   def parse_audio_specific_config(audio_specific_config) do
     <<profile::5, frequency_id::4, audio_specific_config_rest::bitstring>> = audio_specific_config
 
@@ -37,7 +37,7 @@ defmodule Membrane.AAC.Parser.AudioSpecificConfig do
         do: custom_frequency,
         else: AAC.sampling_frequency_id_to_sample_rate(frequency_id)
 
-    %AAC{
+    %{
       profile: AAC.aot_id_to_profile(profile),
       mpeg_version: 4,
       sample_rate: sample_rate,

lib/membrane/aac/parser/config.ex

@@ -39,10 +39,23 @@ defmodule Membrane.AAC.Parser.Config do
           """)
         end)
 
-        esds_stream_format
+        esds_stream_format =
+          if esds_stream_format.channels == :AOT_specific do
+            # It means that the set of channels is described
+            # in the channel configutation, as specified by
+            # MPEG-4 p. 3, section 4.4.1.1.
+            # In our case it's sufficient
+            # to just read the number of channels
+            %{esds_stream_format | channels: stream_format.channels}
+          else
+            esds_stream_format
+          end
+
+        struct(AAC, esds_stream_format)
 
       {:audio_specific_config, audio_specific_config} ->
-        AudioSpecificConfig.parse_audio_specific_config(audio_specific_config)
+        format = AudioSpecificConfig.parse_audio_specific_config(audio_specific_config)
+        struct(AAC, format)
 
       nil ->
         stream_format

lib/membrane/aac/parser/esds.ex

@@ -40,7 +40,7 @@ defmodule Membrane.AAC.Parser.Esds do
     <<section_no, type_tag::binary, byte_size(payload), payload::binary>>
   end
 
-  @spec parse_esds(binary()) :: AAC.t()
+  @spec parse_esds(binary()) :: map()
   def parse_esds(esds) do
     {section_3, <<>>} = unpack_esds_section(esds, 3)
 

mix.exs

@@ -1,7 +1,7 @@
 defmodule Membrane.AAC.MixProject do
   use Mix.Project
 
-  @version "0.18.1"
+  @version "0.18.2"
   @github_url "https://github.com/membraneframework/membrane_aac_plugin"
 
   def project do