fix: removed downloading ffmpeg if not needed

packages/react-native-audio-api/RNAudioAPI.podspec

@@ -12,6 +12,7 @@ version_flag = "-DAUDIOAPI_VERSION=#{package_json['version']}"
 
 worklets_preprocessor_flag = check_if_worklets_enabled() ? '-DRN_AUDIO_API_ENABLE_WORKLETS=1' : ''
 ffmpeg_flag = $RN_AUDIO_API_FFMPEG_DISABLED ? '-DRN_AUDIO_API_FFMPEG_DISABLED=1' : ''
+skip_ffmpeg_argument = $RN_AUDIO_API_FFMPEG_DISABLED ? 'skipffmpeg' : ''
 
 Pod::Spec.new do |s|
   s.name         = "RNAudioAPI"
@@ -50,7 +51,7 @@ Pod::Spec.new do |s|
 
   s.prepare_command = <<-CMD
     chmod +x scripts/download-prebuilt-binaries.sh
-    scripts/download-prebuilt-binaries.sh ios
+    scripts/download-prebuilt-binaries.sh ios #{skip_ffmpeg_argument}
   CMD
 
   # Assumes Pods dir is nested under ios project dir

packages/react-native-audio-api/android/build.gradle

@@ -155,8 +155,7 @@ android {
 
     buildConfigField "boolean", "IS_NEW_ARCHITECTURE_ENABLED", isNewArchitectureEnabled().toString()
     buildConfigField "boolean", "RN_AUDIO_API_ENABLE_WORKLETS", "${isWorkletsAvailable}"
-
-
+    buildConfigField "boolean", "RN_AUDIO_API_FFMPEG_DISABLED", isFFmpegDisabled().toString()
 
     externalNativeBuild {
       cmake {
@@ -310,7 +309,7 @@ def assertMinimalReactNativeVersion = task assertMinimalReactNativeVersionTask {
 task downloadPrebuiltBinaries(type: Exec) {
   commandLine 'chmod', '+x', '../scripts/download-prebuilt-binaries.sh'
   commandLine 'bash', '../scripts/download-prebuilt-binaries.sh'
-  args 'android'
+  args 'android', isFFmpegDisabled() ? 'skipffmpeg' : ''
 }
 
 // Make preBuild depend on the download task

packages/react-native-audio-api/android/src/main/cpp/audioapi/CMakeLists.txt

@@ -3,6 +3,12 @@ cmake_minimum_required(VERSION 3.12.0)
 file(GLOB_RECURSE ANDROID_CPP_SOURCES CONFIGURE_DEPENDS "${ANDROID_CPP_DIR}/audioapi/*.cpp")
 file(GLOB_RECURSE COMMON_CPP_SOURCES CONFIGURE_DEPENDS "${COMMON_CPP_DIR}/audioapi/*.cpp" "${COMMON_CPP_DIR}/audioapi/*.c")
 
+if (RN_AUDIO_API_FFMPEG_DISABLED)
+  list(REMOVE_ITEM COMMON_CPP_SOURCES
+    "${COMMON_CPP_DIR}/audioapi/libs/ffmpeg/FFmpegDecoding.cpp"
+  )
+endif()
+
 set_source_files_properties(
   ${COMMON_CPP_SOURCES}/dsp/*.cpp
   PROPERTIES
@@ -21,10 +27,12 @@ foreach(lib IN ITEMS opus opusfile ogg vorbis vorbisenc vorbisfile crypto ssl)
   set_target_properties(${lib} PROPERTIES IMPORTED_LOCATION ${EXTERNAL_DIR}/${ANDROID_ABI}/lib${lib}.a)
 endforeach()
 
- foreach (lib IN ITEMS avcodec avformat avutil swresample)
-   add_library(${lib} SHARED IMPORTED)
-   set_target_properties(${lib} PROPERTIES IMPORTED_LOCATION ${JNI_LIBS_DIR}/${ANDROID_ABI}/lib${lib}.so)
- endforeach()
+if (NOT RN_AUDIO_API_FFMPEG_DISABLED)
+  foreach (lib IN ITEMS avcodec avformat avutil swresample)
+    add_library(${lib} SHARED IMPORTED)
+    set_target_properties(${lib} PROPERTIES IMPORTED_LOCATION ${JNI_LIBS_DIR}/${ANDROID_ABI}/lib${lib}.so)
+  endforeach()
+endif()
 
 find_package(ReactAndroid REQUIRED CONFIG)
 find_package(fbjni REQUIRED CONFIG)
@@ -120,6 +128,13 @@ else()
   )
 endif()
 
+if (RN_AUDIO_API_FFMPEG_DISABLED)
+  target_compile_definitions(
+    react-native-audio-api
+    PRIVATE RN_AUDIO_API_FFMPEG_DISABLED=1
+  )
+endif()
+
 target_link_libraries(react-native-audio-api
   ${LINK_LIBRARIES}
   ${RN_VERSION_LINK_LIBRARIES}
@@ -129,11 +144,16 @@ target_link_libraries(react-native-audio-api
   vorbis
   vorbisenc
   vorbisfile
-  avcodec
-  avformat
-  avutil
-  swresample
   crypto
   ssl
   z
 )
+
+if(NOT RN_AUDIO_API_FFMPEG_DISABLED)
+  target_link_libraries(react-native-audio-api
+    avcodec
+    avformat
+    avutil
+    swresample
+  )
+endif()

packages/react-native-audio-api/common/cpp/audioapi/utils/SpscChannel.hpp

@@ -8,6 +8,14 @@
 #include <type_traits>
 #include <utility>
 
+#ifdef __cpp_lib_hardware_interference_size
+using std::hardware_constructive_interference_size;
+using std::hardware_destructive_interference_size;
+#else
+constexpr std::size_t hardware_constructive_interference_size = 64;
+constexpr std::size_t hardware_destructive_interference_size = 64;
+#endif
+
 namespace audioapi::channels::spsc {
 
 /// @brief Overflow strategy for sender when the channel is full
@@ -414,17 +422,17 @@ class InnerChannel {
   T *buffer_;
 
   /// Producer-side data (accessed by sender thread)
-  alignas(std::hardware_destructive_interference_size) std::atomic<size_t> sendCursor_{0};
-  alignas(std::hardware_destructive_interference_size) size_t rcvCursorCache_{
+  alignas(hardware_constructive_interference_size) std::atomic<size_t> sendCursor_{0};
+  alignas(hardware_constructive_interference_size) size_t rcvCursorCache_{
       0}; // reduces cache coherency
 
   /// Consumer-side data (accessed by receiver thread)
-  alignas(std::hardware_destructive_interference_size) std::atomic<size_t> rcvCursor_{0};
-  alignas(std::hardware_destructive_interference_size) size_t sendCursorCache_{
+  alignas(hardware_constructive_interference_size) std::atomic<size_t> rcvCursor_{0};
+  alignas(hardware_constructive_interference_size) size_t sendCursorCache_{
       0}; // reduces cache coherency
 
   /// Flag indicating if the oldest element is occupied
-  alignas(std::hardware_destructive_interference_size) std::atomic<bool> oldestOccupied_{false};
+  alignas(hardware_constructive_interference_size) std::atomic<bool> oldestOccupied_{false};
 
   friend class Sender<T, Strategy, Wait>;
   friend class Receiver<T, Strategy, Wait>;

packages/react-native-audio-api/scripts/download-prebuilt-binaries.sh

@@ -18,6 +18,12 @@ else
     PROJECT_ROOT="$(pwd)"
 fi
 
+if [ "$2" == "skipffmpeg" ]; then
+    SKIP_FFMPEG=true
+else
+    SKIP_FFMPEG=false
+fi
+
 JNILIBS_DESTINATION="${PROJECT_ROOT}/android/src/main"
 NORMAL_DESTINATION="${PROJECT_ROOT}/common/cpp/audioapi/external"
 
@@ -28,6 +34,10 @@ for name in "${DOWNLOAD_NAMES[@]}"; do
     # Get the directory name from the zip name (e.g., "armeabi-v7a.zip" -> "armeabi-v7a")
     EXTRACTED_DIR_NAME="${name%.zip}"
 
+    if [[ ("$EXTRACTED_DIR_NAME" == "ffmpeg_ios" || "$EXTRACTED_DIR_NAME" == "jniLibs") && "$SKIP_FFMPEG" == true ]]; then
+        continue
+    fi
+
     # Determine the final output path
     if [[ "$name" == "jniLibs.zip" ]]; then
         OUTPUT_DIR="${JNILIBS_DESTINATION}"