ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptState) { ASSERT(isMainThread()); // Calling close() on an OfflineAudioContext is not supported/allowed, // but it might well have been stopped by its execution context. // // See: crbug.com/435867 if (isContextClosed()) { return ScriptPromise::rejectWithDOMException( scriptState, DOMException::create( InvalidStateError, "cannot call startRendering on an OfflineAudioContext in a stopped state.")); } // If the context is not in the suspended state (i.e. running), reject the promise. if (contextState() != AudioContextState::Suspended) { return ScriptPromise::rejectWithDOMException( scriptState, DOMException::create( InvalidStateError, "cannot startRendering when an OfflineAudioContext is " + state())); } // Can't call startRendering more than once. Return a rejected promise now. if (m_isRenderingStarted) { return ScriptPromise::rejectWithDOMException( scriptState, DOMException::create( InvalidStateError, "cannot call startRendering more than once")); } ASSERT(!m_isRenderingStarted); m_completeResolver = ScriptPromiseResolver::create(scriptState); // Start rendering and return the promise. m_isRenderingStarted = true; setContextState(Running); destinationHandler().startRendering(); return m_completeResolver->promise(); }
ScriptPromise OfflineAudioContext::resumeContext(ScriptState* scriptState) { ASSERT(isMainThread()); ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState); ScriptPromise promise = resolver->promise(); // If the rendering has not started, reject the promise. if (!m_isRenderingStarted) { resolver->reject(DOMException::create(InvalidStateError, "cannot resume an offline context that has not started")); return promise; } // If the context is in a closed state, reject the promise. if (contextState() == AudioContextState::Closed) { resolver->reject(DOMException::create(InvalidStateError, "cannot resume a closed offline context")); return promise; } // If the context is already running, resolve the promise without altering // the current state or starting the rendering loop. if (contextState() == AudioContextState::Running) { resolver->resolve(); return promise; } ASSERT(contextState() == AudioContextState::Suspended); // If the context is suspended, resume rendering by setting the state to // "Running". and calling startRendering(). Note that resuming is possible // only after the rendering started. setContextState(Running); destinationHandler().startRendering(); // Resolve the promise immediately. resolver->resolve(); return promise; }
ScriptPromise OfflineAudioContext::suspendContext(ScriptState* scriptState, double when) { ASSERT(isMainThread()); ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState); ScriptPromise promise = resolver->promise(); // The render thread does not exist; reject the promise. if (!destinationHandler().offlineRenderThread()) { resolver->reject(DOMException::create(InvalidStateError, "the rendering is already finished")); return promise; } // The specified suspend time is negative; reject the promise. if (when < 0) { resolver->reject(DOMException::create(InvalidStateError, "negative suspend time (" + String::number(when) + ") is not allowed")); return promise; } // Quantize (to the lower boundary) the suspend time by the render quantum. size_t frame = when * sampleRate(); frame -= frame % destinationHandler().renderQuantumFrames(); // The suspend time should be earlier than the total render frame. If the // requested suspension time is equal to the total render frame, the promise // will be rejected. if (m_totalRenderFrames <= frame) { resolver->reject(DOMException::create(InvalidStateError, "cannot schedule a suspend at frame " + String::number(frame) + " (" + String::number(when) + " seconds) " + "because it is greater than or equal to the total render duration of " + String::number(m_totalRenderFrames) + " frames")); return promise; } // The specified suspend time is in the past; reject the promise. if (frame < currentSampleFrame()) { resolver->reject(DOMException::create(InvalidStateError, "cannot schedule a suspend at frame " + String::number(frame) + " (" + String::number(when) + " seconds) because it is earlier than the current frame of " + String::number(currentSampleFrame()) + " (" + String::number(currentTime()) + " seconds)")); return promise; } // Wait until the suspend map is available for the insertion. Here we should // use AutoLocker because it locks the graph from the main thread. AutoLocker locker(this); // If there is a duplicate suspension at the same quantized frame, // reject the promise. if (m_scheduledSuspends.contains(frame)) { resolver->reject(DOMException::create(InvalidStateError, "cannot schedule more than one suspend at frame " + String::number(frame) + " (" + String::number(when) + " seconds)")); return promise; } m_scheduledSuspends.add(frame, resolver); return promise; }
/////////////////////////////////////////////////////////// // // Returns a data handler for the waveform // /////////////////////////////////////////////////////////// ptr<handlers::dataHandler> waveform::getIntegerData(std::uint32_t channel, std::int32_t paddingValue) { PUNTOEXE_FUNCTION_START(L"waveform::getIntegerData"); static std::int32_t uLawDecompressTable[256] = { -32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956, -23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764, -15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412, -11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316, -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140, -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092, -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004, -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980, -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436, -1372, -1308, -1244, -1180, -1116, -1052, -988, -924, -876, -844, -812, -780, -748, -716, -684, -652, -620, -588, -556, -524, -492, -460, -428, -396, -372, -356, -340, -324, -308, -292, -276, -260, -244, -228, -212, -196, -180, -164, -148, -132, -120, -112, -104, -96, -88, -80, -72, -64, -56, -48, -40, -32, -24, -16, -8, 0, 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956, 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764, 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412, 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316, 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140, 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092, 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004, 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980, 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436, 1372, 1308, 1244, 1180, 1116, 1052, 988, 924, 876, 844, 812, 780, 748, 716, 684, 652, 620, 588, 556, 524, 492, 460, 428, 396, 372, 356, 340, 324, 308, 292, 276, 260, 244, 228, 212, 196, 180, 164, 148, 132, 120, 112, 104, 96, 88, 80, 72, 64, 56, 48, 40, 32, 24, 16, 8, 0 }; static std::int32_t aLawDecompressTable[256] = { -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736, -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784, -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368, -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392, -22016,-20992,-24064,-23040,-17920,-16896,-19968,-18944, -30208,-29184,-32256,-31232,-26112,-25088,-28160,-27136, -11008,-10496,-12032,-11520,-8960, -8448, -9984, -9472, -15104,-14592,-16128,-15616,-13056,-12544,-14080,-13568, -344, -328, -376, -360, -280, -264, -312, -296, -472, -456, -504, -488, -408, -392, -440, -424, -88, -72, -120, -104, -24, -8, -56, -40, -216, -200, -248, -232, -152, -136, -184, -168, -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184, -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696, -688, -656, -752, -720, -560, -528, -624, -592, -944, -912, -1008, -976, -816, -784, -880, -848, 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736, 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784, 2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368, 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392, 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944, 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136, 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472, 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568, 344, 328, 376, 360, 280, 264, 312, 296, 472, 456, 504, 488, 408, 392, 440, 424, 88, 72, 120, 104, 24, 8, 56, 40, 216, 200, 248, 232, 152, 136, 184, 168, 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184, 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696, 688, 656, 752, 720, 560, 528, 624, 592, 944, 912, 1008, 976, 816, 784, 880, 848 }; // Lock the dataset during the interpretation of the // dataset /////////////////////////////////////////////////////////// lockObject lockDataSet(m_pDataSet); // Get the original data /////////////////////////////////////////////////////////// ptr<handlers::dataHandler> waveformData(m_pDataSet->getDataHandler(0x5400, 0x0, 0x1010, 0, false)); std::string sourceDataType(waveformData->getDataType()); // Get the interpretation, number of channels, number of // samples /////////////////////////////////////////////////////////// std::string waveformInterpretation(getInterpretation()); std::uint32_t numChannels(getChannels()); std::uint32_t numSamples(getSamples()); std::uint32_t originalPaddingValue(0); bool bPaddingValueExists(false); ptr<handlers::dataHandler> paddingTagHandler(m_pDataSet->getDataHandler(0x5400, 0, 0x100A, 0, false)); if(paddingTagHandler != 0) { originalPaddingValue = paddingTagHandler->getUnsignedLong(0); bPaddingValueExists = true; } // Allocate a buffer for the destination data /////////////////////////////////////////////////////////// ptr<buffer> waveformBuffer(new buffer(0, "SL")); ptr<handlers::dataHandler> destinationHandler(waveformBuffer->getDataHandler(true, numSamples)); // Copy the data to the destination for unsigned values /////////////////////////////////////////////////////////// std::uint32_t waveformPointer(channel); std::uint32_t destinationPointer(0); if(sourceDataType == "UB" || sourceDataType == "US") { for(std::uint32_t copySamples (numSamples); copySamples != 0; --copySamples) { std::uint32_t unsignedData(waveformData->getUnsignedLong(waveformPointer)); waveformPointer += numChannels; if(bPaddingValueExists && unsignedData == originalPaddingValue) { destinationHandler->setSignedLong(destinationPointer++, paddingValue); continue; } destinationHandler->setUnsignedLong(destinationPointer++, unsignedData); } return destinationHandler; } // Copy the data to the destination for signed values /////////////////////////////////////////////////////////// int highBit(getBitsAllocated() - 1); std::uint32_t testBit = ((std::uint32_t)1) << highBit; std::uint32_t orBits = ((std::uint32_t)((std::int32_t)-1)) << highBit; for(std::uint32_t copySamples (numSamples); copySamples != 0; --copySamples) { std::uint32_t unsignedData = waveformData->getUnsignedLong(waveformPointer); waveformPointer += numChannels; if(bPaddingValueExists && unsignedData == originalPaddingValue) { destinationHandler->setSignedLong(destinationPointer++, paddingValue);; continue; } if((unsignedData & testBit) != 0) { unsignedData |= orBits; } destinationHandler->setSignedLong(destinationPointer++, (std::int32_t)unsignedData); } // Now decompress uLaw or aLaw if(waveformInterpretation == "AB") // 8bits aLaw { for(std::uint32_t aLawSamples(0); aLawSamples != numSamples; ++aLawSamples) { std::uint32_t compressed(destinationHandler->getUnsignedLong(aLawSamples)); if(bPaddingValueExists && compressed == originalPaddingValue) { continue; } std::int32_t decompressed(aLawDecompressTable[compressed]); destinationHandler->setSignedLong(aLawSamples, decompressed); } } // Now decompress uLaw or aLaw if(waveformInterpretation == "MB") // 8bits aLaw { for(std::uint32_t uLawSamples(0); uLawSamples != numSamples; ++uLawSamples) { std::uint32_t compressed(destinationHandler->getUnsignedLong(uLawSamples)); if(bPaddingValueExists && compressed == originalPaddingValue) { continue; } std::int32_t decompressed(uLawDecompressTable[compressed]); destinationHandler->setSignedLong(uLawSamples, decompressed); } } return destinationHandler; PUNTOEXE_FUNCTION_END(); }