1 files changed, 73 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/platform/mediastream/MediaStreamWebAudioSource.cpp b/chromium/third_party/WebKit/Source/platform/mediastream/MediaStreamWebAudioSource.cpp
new file mode 100644
index 00000000000..3e0f96b9553
--- /dev/null
+++ b/chromium/third_party/WebKit/Source/platform/mediastream/MediaStreamWebAudioSource.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2014 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 documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name of Google Inc. nor the names of its contributors
+ *    may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if ENABLE(WEB_AUDIO)
+
+#include "platform/mediastream/MediaStreamWebAudioSource.h"
+
+#include "platform/audio/AudioBus.h"
+#include "public/platform/WebAudioSourceProvider.h"
+
+namespace WebCore {
+
+MediaStreamWebAudioSource::MediaStreamWebAudioSource(PassOwnPtr<blink::WebAudioSourceProvider> provider)
+    : m_webAudioSourceProvider(provider)
+{
+}
+
+MediaStreamWebAudioSource::~MediaStreamWebAudioSource()
+{
+}
+
+void MediaStreamWebAudioSource::provideInput(AudioBus* bus, size_t framesToProcess)
+{
+    ASSERT(bus);
+    if (!bus)
+        return;
+
+    if (!m_webAudioSourceProvider) {
+        bus->zero();
+        return;
+    }
+
+    // Wrap the AudioBus channel data using WebVector.
+    size_t n = bus->numberOfChannels();
+    blink::WebVector<float*> webAudioData(n);
+    for (size_t i = 0; i < n; ++i)
+        webAudioData[i] = bus->channel(i)->mutableData();
+
+    m_webAudioSourceProvider->provideInput(webAudioData, framesToProcess);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_AUDIO)