Audio engine

Adds an audio engine abstraction (implemented with miniaudio) in Rive. We can selectively replace it with other abstractions later if we find miniaudio isn't well suited everywhere but I'm confident it will be based on flexibility with getting it working in the recorder.

Adds audio support in:

- packages/rive_common
  - WASM: rive_audio_wasm.dart
  - FFI: rive_audio_ffi.dart
- packages/runtime
- packages/recorder

Subsequent PR will add support in:

- packages/rive_unity
  - This is getting meaty enough...
- packages/rive_flutter
  - This requires publishing rive_common so I want to make sure this is reviewed and accepted before publishing
  - I'd also prefer to merge layout constraints into rive_common before this lands.

Editor features:
- Updated preview window:
<img width="248" alt="CleanShot 2024-01-15 at 14 44 31@2x" src="https://github.com/rive-app/rive/assets/454182/a9588be6-8370-4e22-ab32-af1e9ed71183">

- Preview waveforms in the timeline:
<img width="651" alt="CleanShot 2024-01-15 at 14 44 53@2x" src="https://github.com/rive-app/rive/assets/454182/2710667f-838f-483d-9647-e2bcb9e0237a">

- Subsequent PR will also use threads in web editor build (currently uses a time/frame based decoder to offload ui). I can't do that until I can verify the Shared Memory access is granted once rive_common lands in pub.dev and then we can push to UAT.

Diffs=
73bf11db3 Audio engine (#6454)

Co-authored-by: Luigi Rosso <[email protected]>

.rive_head

@@ -1 +1 @@
-ebff4893cb0698855530d530a6f952880dceb229
+73bf11db39230e7a6d302da9a27414d35bcbee99

wasm/premake5.lua

@@ -1,6 +1,7 @@
 local dependency = require 'dependency'
 harfbuzz = dependency.github('harfbuzz/harfbuzz', '6.0.0')
 sheenbidi = dependency.github('Tehreer/SheenBidi', 'v2.6')
+miniaudio = dependency.github('rive-app/miniaudio', 'rive')
 
 workspace 'rive'
 configurations {'debug', 'release'}
@@ -16,10 +17,11 @@ source = os.isdir('../../runtime') and '../../runtime' or './submodules/rive-cpp
 includedirs {
     source .. '/include',
     harfbuzz .. '/src',
-    sheenbidi .. '/Headers'
+    sheenbidi .. '/Headers',
+    miniaudio
 }
 flags {
-    'FatalCompileWarnings',
+    'FatalCompileWarnings'
 }
 
 files {
@@ -351,7 +353,7 @@ end
 
 filter 'options:not lite'
 do
-    defines { 'WITH_RIVE_TEXT' }
+    defines {'WITH_RIVE_TEXT', 'WITH_RIVE_AUDIO'}
 end
 
 filter 'configurations:debug'

wasm/src/bindings.cpp

@@ -618,15 +618,14 @@ EMSCRIPTEN_BINDINGS(RiveWASM)
             }))
         .function("decode",
                   optional_override([](rive::FileAsset& self, emscripten ::val byteArray) {
-                      std::vector<unsigned char> charVector;
-                      const auto length = byteArray["byteLength"].as<unsigned>();
-                      charVector.resize(length);
+                      auto length = byteArray["byteLength"].as<unsigned>();
+                      rive::SimpleArray<uint8_t> bytes((size_t)length);
 
                       emscripten::val memoryView{
-                          emscripten::typed_memory_view(length, charVector.data())};
+                          emscripten::typed_memory_view(length, bytes.data())};
 
                       memoryView.call<void>("set", byteArray);
-                      self.decode(charVector, jsFactory());
+                      self.decode(bytes, jsFactory());
                   }),
                   allow_raw_pointers());