#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "AudioBuffer.h"
#include "AudioContext.h"
#include "AudioFileReader.h"
#include <runtime/JSCInlines.h>
#include <runtime/TypedArrayInlines.h>
namespace WebCore {
RefPtr<AudioBuffer> AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
{
if (sampleRate < 22050 || sampleRate > 96000 || numberOfChannels > AudioContext::maxNumberOfChannels() || !numberOfFrames)
return nullptr;
return adoptRef(*new AudioBuffer(numberOfChannels, numberOfFrames, sampleRate));
}
RefPtr<AudioBuffer> AudioBuffer::createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate)
{
RefPtr<AudioBus> bus = createBusFromInMemoryAudioFile(data, dataSize, mixToMono, sampleRate);
if (!bus)
return nullptr;
return adoptRef(*new AudioBuffer(*bus));
}
AudioBuffer::AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
: m_sampleRate(sampleRate)
, m_length(numberOfFrames)
{
m_channels.reserveCapacity(numberOfChannels);
for (unsigned i = 0; i < numberOfChannels; ++i) {
RefPtr<Float32Array> channelDataArray = Float32Array::create(m_length);
channelDataArray->setNeuterable(false);
m_channels.append(channelDataArray);
}
}
AudioBuffer::AudioBuffer(AudioBus& bus)
: m_sampleRate(bus.sampleRate())
, m_length(bus.length())
{
unsigned numberOfChannels = bus.numberOfChannels();
m_channels.reserveCapacity(numberOfChannels);
for (unsigned i = 0; i < numberOfChannels; ++i) {
auto channelDataArray = Float32Array::create(m_length);
channelDataArray->setNeuterable(false);
channelDataArray->setRange(bus.channel(i)->data(), m_length, 0);
m_channels.append(WTFMove(channelDataArray));
}
}
void AudioBuffer::releaseMemory()
{
m_channels.clear();
}
ExceptionOr<Ref<Float32Array>> AudioBuffer::getChannelData(unsigned channelIndex)
{
if (channelIndex >= m_channels.size())
return Exception { SYNTAX_ERR };
auto& channelData = *m_channels[channelIndex];
auto array = Float32Array::create(channelData.unsharedBuffer(), channelData.byteOffset(), channelData.length());
RELEASE_ASSERT(array);
return array.releaseNonNull();
}
Float32Array* AudioBuffer::channelData(unsigned channelIndex)
{
if (channelIndex >= m_channels.size())
return nullptr;
return m_channels[channelIndex].get();
}
void AudioBuffer::zero()
{
for (auto& channel : m_channels)
channel->zeroRange(0, length());
}
size_t AudioBuffer::memoryCost() const
{
size_t cost = 0;
for (auto& channel : m_channels)
cost += channel->byteLength();
return cost;
}
}
#endif // ENABLE(WEB_AUDIO)