#include "config.h"
#if ENABLE(WEB_AUDIO) & ENABLE(WEBGL)
#include "AudioBuffer.h"
#include "AudioBus.h"
#include "AudioFileReader.h"
#include "ExceptionCode.h"
#include <wtf/OwnPtr.h>
namespace WebCore {
PassRefPtr<AudioBuffer> AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrames, double sampleRate)
{
return adoptRef(new AudioBuffer(numberOfChannels, numberOfFrames, sampleRate));
}
PassRefPtr<AudioBuffer> AudioBuffer::createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, double sampleRate)
{
OwnPtr<AudioBus> bus = createBusFromInMemoryAudioFile(data, dataSize, mixToMono, sampleRate);
if (bus.get())
return adoptRef(new AudioBuffer(bus.get()));
return 0;
}
AudioBuffer::AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, double sampleRate)
: m_gain(1.0)
, m_sampleRate(sampleRate)
, m_length(numberOfFrames)
{
m_channels.reserveCapacity(numberOfChannels);
for (unsigned i = 0; i < numberOfChannels; ++i) {
RefPtr<Float32Array> channelDataArray = Float32Array::create(m_length);
m_channels.append(channelDataArray);
}
}
AudioBuffer::AudioBuffer(AudioBus* bus)
: m_gain(1.0)
, m_sampleRate(bus->sampleRate())
, m_length(bus->length())
{
unsigned numberOfChannels = bus->numberOfChannels();
m_channels.reserveCapacity(numberOfChannels);
for (unsigned i = 0; i < numberOfChannels; ++i) {
RefPtr<Float32Array> channelDataArray = Float32Array::create(m_length);
ExceptionCode ec;
channelDataArray->setRange(bus->channel(i)->data(), m_length, 0, ec);
m_channels.append(channelDataArray);
}
}
void AudioBuffer::releaseMemory()
{
m_channels.clear();
}
Float32Array* AudioBuffer::getChannelData(unsigned channelIndex)
{
if (channelIndex >= m_channels.size())
return 0;
return m_channels[channelIndex].get();
}
void AudioBuffer::zero()
{
for (unsigned i = 0; i < m_channels.size(); ++i) {
if (getChannelData(i)) {
ExceptionCode ec;
getChannelData(i)->zeroRange(0, length(), ec);
}
}
}
}
#endif // ENABLE(WEB_AUDIO) & ENABLE(WEBGL)