LibAudio: Remove an unnecessary copy of sample buffers before sending…

… them.

I missed this earlier, but *now* we're actually using the same SharedBuffer
all the way from client-side WAV reading to server-side mixing. :^)

Libraries/LibAudio/ABuffer.h

@@ -68,6 +68,7 @@ class ABuffer : public RefCounted<ABuffer> {
  const void* data() const { return m_buffer->data(); }
  int size_in_bytes() const { return m_buffer->size(); }
  int shared_buffer_id() const { return m_buffer->shared_buffer_id(); }
+ SharedBuffer& shared_buffer() { return *m_buffer; }
 
 private:
  explicit ABuffer(Vector<ASample>&& samples)

Libraries/LibAudio/AClientConnection.cpp

@@ -19,17 +19,9 @@ void AClientConnection::handshake()
 
 void AClientConnection::play(const ABuffer& buffer, bool block)
 {
- auto shared_buf = SharedBuffer::create_with_size(buffer.size_in_bytes());
- if (!shared_buf) {
- dbg() << "Failed to create a shared buffer!";
- return;
- }
-
- memcpy(shared_buf->data(), buffer.data(), buffer.size_in_bytes());
- shared_buf->seal();
- shared_buf->share_with(server_pid());
+ const_cast<ABuffer&>(buffer).shared_buffer().share_with(server_pid());
  ASAPI_ClientMessage request;
  request.type = ASAPI_ClientMessage::Type::PlayBuffer;
- request.play_buffer.buffer_id = shared_buf->shared_buffer_id();
+ request.play_buffer.buffer_id = buffer.shared_buffer_id();
  sync_request(request, block ? ASAPI_ServerMessage::Type::FinishedPlayingBuffer : ASAPI_ServerMessage::Type::PlayingBuffer);
 }