| /* |
| * Copyright (C) 2020 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE(MEDIA_STREAM) && USE(AVFOUNDATION) |
| |
| #import <CoreMedia/CoreMedia.h> |
| #import <wtf/WorkQueue.h> |
| |
| typedef struct opaqueCMSampleBuffer *CMSampleBufferRef; |
| typedef struct OpaqueAudioConverter* AudioConverterRef; |
| |
| namespace WebCore { |
| |
| class AudioSampleBufferCompressor { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| static std::unique_ptr<AudioSampleBufferCompressor> create(CMBufferQueueTriggerCallback, void* callbackObject); |
| ~AudioSampleBufferCompressor(); |
| |
| void setBitsPerSecond(unsigned); |
| void finish(); |
| void addSampleBuffer(CMSampleBufferRef); |
| CMSampleBufferRef getOutputSampleBuffer(); |
| RetainPtr<CMSampleBufferRef> takeOutputSampleBuffer(); |
| |
| unsigned bitRate() const; |
| |
| private: |
| AudioSampleBufferCompressor(); |
| bool initialize(CMBufferQueueTriggerCallback, void* callbackObject); |
| UInt32 defaultOutputBitRate(const AudioStreamBasicDescription&) const; |
| |
| static OSStatus audioConverterComplexInputDataProc(AudioConverterRef, UInt32*, AudioBufferList*, AudioStreamPacketDescription**, void*); |
| |
| void processSampleBuffer(CMSampleBufferRef); |
| bool initAudioConverterForSourceFormatDescription(CMFormatDescriptionRef, AudioFormatID); |
| size_t computeBufferSizeForAudioFormat(AudioStreamBasicDescription, UInt32, Float32); |
| void attachPrimingTrimsIfNeeded(CMSampleBufferRef); |
| RetainPtr<NSNumber> gradualDecoderRefreshCount(); |
| RetainPtr<CMSampleBufferRef> sampleBufferWithNumPackets(UInt32 numPackets, AudioBufferList); |
| void processSampleBuffersUntilLowWaterTime(CMTime); |
| OSStatus provideSourceDataNumOutputPackets(UInt32*, AudioBufferList*, AudioStreamPacketDescription**); |
| |
| Ref<WorkQueue> m_serialDispatchQueue; |
| CMTime m_lowWaterTime { kCMTimeInvalid }; |
| |
| RetainPtr<CMBufferQueueRef> m_outputBufferQueue; |
| RetainPtr<CMBufferQueueRef> m_inputBufferQueue; |
| bool m_isEncoding { false }; |
| |
| AudioConverterRef m_converter { nullptr }; |
| AudioStreamBasicDescription m_sourceFormat; |
| AudioStreamBasicDescription m_destinationFormat; |
| RetainPtr<CMFormatDescriptionRef> m_destinationFormatDescription; |
| RetainPtr<NSNumber> m_gdrCountNum; |
| UInt32 m_maxOutputPacketSize { 0 }; |
| Vector<AudioStreamPacketDescription> m_destinationPacketDescriptions; |
| |
| CMTime m_currentNativePresentationTimeStamp { kCMTimeInvalid }; |
| CMTime m_currentOutputPresentationTimeStamp { kCMTimeInvalid }; |
| CMTime m_remainingPrimeDuration { kCMTimeInvalid }; |
| |
| Vector<uint8_t> m_sourceBuffer; |
| Vector<uint8_t> m_destinationBuffer; |
| |
| RetainPtr<CMBlockBufferRef> m_sampleBlockBuffer; |
| size_t m_sampleBlockBufferSize { 0 }; |
| size_t m_currentOffsetInSampleBlockBuffer { 0 }; |
| AudioFormatID m_outputCodecType { kAudioFormatMPEG4AAC }; |
| std::optional<unsigned> m_outputBitRate; |
| }; |
| |
| } |
| |
| #endif // ENABLE(MEDIA_STREAM) && USE(AVFOUNDATION) |