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33 #include "AudioBuffer.h"
36 #include "AudioFileReader.h"
37 #include "ExceptionCode.h"
38 #include <wtf/OwnPtr.h>
42 PassRefPtr<AudioBuffer> AudioBuffer::create(unsigned numberOfChannels, size_t numberOfFrames, double sampleRate)
44 return adoptRef(new AudioBuffer(numberOfChannels, numberOfFrames, sampleRate));
47 PassRefPtr<AudioBuffer> AudioBuffer::createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, double sampleRate)
49 OwnPtr<AudioBus> bus = createBusFromInMemoryAudioFile(data, dataSize, mixToMono, sampleRate);
51 return adoptRef(new AudioBuffer(bus.get()));
56 AudioBuffer::AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, double sampleRate)
58 , m_sampleRate(sampleRate)
59 , m_length(numberOfFrames)
61 m_channels.reserveCapacity(numberOfChannels);
63 for (unsigned i = 0; i < numberOfChannels; ++i) {
64 RefPtr<Float32Array> channelDataArray = Float32Array::create(m_length);
65 m_channels.append(channelDataArray);
69 AudioBuffer::AudioBuffer(AudioBus* bus)
71 , m_sampleRate(bus->sampleRate())
72 , m_length(bus->length())
74 // Copy audio data from the bus to the Float32Arrays we manage.
75 unsigned numberOfChannels = bus->numberOfChannels();
76 m_channels.reserveCapacity(numberOfChannels);
77 for (unsigned i = 0; i < numberOfChannels; ++i) {
78 RefPtr<Float32Array> channelDataArray = Float32Array::create(m_length);
80 channelDataArray->setRange(bus->channel(i)->data(), m_length, 0, ec);
81 m_channels.append(channelDataArray);
85 void AudioBuffer::releaseMemory()
90 Float32Array* AudioBuffer::getChannelData(unsigned channelIndex)
92 if (channelIndex >= m_channels.size())
95 return m_channels[channelIndex].get();
98 void AudioBuffer::zero()
100 for (unsigned i = 0; i < m_channels.size(); ++i) {
101 if (getChannelData(i)) {
103 getChannelData(i)->zeroRange(0, length(), ec);
108 } // namespace WebCore
110 #endif // ENABLE(WEB_AUDIO)