Allow disabling of resampling in decodeAudioData

third_party/WebKit/Source/modules/webaudio/AsyncAudioDecoder.cpp

 /*
  * Copyright (C) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 27 matching lines @@
 
 AsyncAudioDecoder::AsyncAudioDecoder()
     : m_thread(wrapUnique(Platform::current()->createThread("Audio Decoder")))
 {
 }
 
 AsyncAudioDecoder::~AsyncAudioDecoder()
 {
 }
 
-void AsyncAudioDecoder::decodeAsync(DOMArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ScriptPromiseResolver* resolver, BaseAudioContext* context)
+void AsyncAudioDecoder::decodeAsync(DOMArrayBuffer* audioData, float sampleRate, bool disableResampling, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ScriptPromiseResolver* resolver, BaseAudioContext* context)
 {
     ASSERT(isMainThread());
     ASSERT(audioData);
     if (!audioData)
         return;
 
-    m_thread->getWebTaskRunner()->postTask(BLINK_FROM_HERE, crossThreadBind(&AsyncAudioDecoder::decode, wrapCrossThreadPersistent(audioData), sampleRate, wrapCrossThreadPersistent(successCallback), wrapCrossThreadPersistent(errorCallback), wrapCrossThreadPersistent(resolver), wrapCrossThreadPersistent(context)));
+    m_thread->getWebTaskRunner()->postTask(
+        BLINK_FROM_HERE,
+        crossThreadBind(
+            &AsyncAudioDecoder::decode,
+            wrapCrossThreadPersistent(audioData),
+            sampleRate,
+            disableResampling,
+            wrapCrossThreadPersistent(successCallback),
+            wrapCrossThreadPersistent(errorCallback),
+            wrapCrossThreadPersistent(resolver), wrapCrossThreadPersistent(context)));
 }
 
-void AsyncAudioDecoder::decode(DOMArrayBuffer* audioData, float sampleRate, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ScriptPromiseResolver* resolver, BaseAudioContext* context)
+void AsyncAudioDecoder::decode(DOMArrayBuffer* audioData, float sampleRate, bool disableResampling, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ScriptPromiseResolver* resolver, BaseAudioContext* context)
 {
-    RefPtr<AudioBus> bus = createBusFromInMemoryAudioFile(audioData->data(), audioData->byteLength(), false, sampleRate);
+    RefPtr<AudioBus> bus = createBusFromInMemoryAudioFile(audioData->data(), audioData->byteLength(), false, disableResampling ? 0 : sampleRate);
 
     // Decoding is finished, but we need to do the callbacks on the main thread.
     // A reference to |*bus| is retained by WTF::Function and will be removed after notifyComplete() is done.
     Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, crossThreadBind(&AsyncAudioDecoder::notifyComplete, wrapCrossThreadPersistent(audioData), wrapCrossThreadPersistent(successCallback), wrapCrossThreadPersistent(errorCallback), bus.release(), wrapCrossThreadPersistent(resolver), wrapCrossThreadPersistent(context)));
 }
 
 void AsyncAudioDecoder::notifyComplete(DOMArrayBuffer*, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, AudioBus* audioBus, ScriptPromiseResolver* resolver, BaseAudioContext* context)
 {
     ASSERT(isMainThread());
 
     AudioBuffer* audioBuffer = AudioBuffer::createFromAudioBus(audioBus);
 
     // Let the context finish the notification.
     context->handleDecodeAudioData(audioBuffer, resolver, successCallback, errorCallback);
 }
 
 } // namespace blink