#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "AudioBuffer.h"
#include "AudioContext.h"
#include "AudioFileReader.h"
#include <JavaScriptCore/JSCInlines.h>
#include <JavaScriptCore/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;
auto buffer = adoptRef(*new AudioBuffer(numberOfChannels, numberOfFrames, sampleRate));
if (!buffer->m_length)
return nullptr;
return WTFMove(buffer);
}
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) {
auto channelDataArray = Float32Array::tryCreate(m_length);
if (!channelDataArray) {
invalidate();
break;
}
channelDataArray->setNeuterable(false);
m_channels.append(WTFMove(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::tryCreate(m_length);
if (!channelDataArray) {
invalidate();
break;
}
channelDataArray->setNeuterable(false);
channelDataArray->setRange(bus.channel(i)->data(), m_length, 0);
m_channels.append(WTFMove(channelDataArray));
}
}
void AudioBuffer::invalidate()
{
releaseMemory();
m_length = 0;
}
void AudioBuffer::releaseMemory()
{
auto locker = holdLock(m_channelsLock);
m_channels.clear();
}
ExceptionOr<Ref<Float32Array>> AudioBuffer::getChannelData(unsigned channelIndex)
{
if (channelIndex >= m_channels.size())
return Exception { SyntaxError };
auto& channelData = *m_channels[channelIndex];
return Float32Array::create(channelData.unsharedBuffer(), channelData.byteOffset(), channelData.length());
}
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
{
auto locker = holdLock(m_channelsLock);
size_t cost = 0;
for (auto& channel : m_channels)
cost += channel->byteLength();
return cost;
}
}
#endif // ENABLE(WEB_AUDIO)