AudioBusChromium.cpp   [plain text]

/*
 * Copyright (C) 2010, Google Inc. All rights reserved.
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#include "config.h"

#if ENABLE(WEB_AUDIO)

#include "AudioBus.h"

#include "AudioFileReader.h"
#include "PlatformBridge.h"
#include <wtf/PassOwnPtr.h>

namespace WebCore {

PassOwnPtr<AudioBus> AudioBus::loadPlatformResource(const char* name, double sampleRate)
{
    // FIXME: the sampleRate parameter is ignored. It should be removed from the API.
    OwnPtr<AudioBus> audioBus = PlatformBridge::loadPlatformAudioResource(name, sampleRate);
    if (!audioBus.get())
        return nullptr;
    
    // If the bus is already at the requested sample-rate then return as is.
    if (audioBus->sampleRate() == sampleRate)
        return audioBus.release();
    
    return AudioBus::createBySampleRateConverting(audioBus.get(), false, sampleRate);
}

PassOwnPtr<AudioBus> createBusFromInMemoryAudioFile(const void* data, size_t dataSize, bool mixToMono, double sampleRate)
{
    // FIXME: the sampleRate parameter is ignored. It should be removed from the API.
    OwnPtr<AudioBus> audioBus = PlatformBridge::decodeAudioFileData(static_cast<const char*>(data), dataSize, sampleRate);
    if (!audioBus.get())
        return nullptr;
      
    // If the bus needs no conversion then return as is.
    if ((!mixToMono || audioBus->numberOfChannels() == 1) && audioBus->sampleRate() == sampleRate)
        return audioBus.release();
    
    return AudioBus::createBySampleRateConverting(audioBus.get(), mixToMono, sampleRate);    
}

} // namespace WebCore

#endif // ENABLE(WEB_AUDIO)