| /* |
| * Copyright (C) 2017 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 |
| |
| #include "AudioStreamDescription.h" |
| #include <CoreAudio/CoreAudioTypes.h> |
| |
| namespace WebCore { |
| |
| WEBCORE_EXPORT bool operator==(const AudioStreamBasicDescription&, const AudioStreamBasicDescription&); |
| inline bool operator!=(const AudioStreamBasicDescription& a, const AudioStreamBasicDescription& b) { return !(a == b); } |
| |
| class WEBCORE_EXPORT CAAudioStreamDescription final : public AudioStreamDescription { |
| WTF_MAKE_FAST_ALLOCATED; |
| |
| public: |
| |
| CAAudioStreamDescription(); |
| CAAudioStreamDescription(const AudioStreamBasicDescription&); |
| CAAudioStreamDescription(double, uint32_t, PCMFormat, bool); |
| ~CAAudioStreamDescription(); |
| |
| const PlatformDescription& platformDescription() const final; |
| |
| PCMFormat format() const final; |
| |
| double sampleRate() const final { return m_streamDescription.mSampleRate; } |
| bool isPCM() const final { return m_streamDescription.mFormatID == kAudioFormatLinearPCM; } |
| bool isInterleaved() const final { return !(m_streamDescription.mFormatFlags & kAudioFormatFlagIsNonInterleaved); } |
| bool isSignedInteger() const final { return isPCM() && (m_streamDescription.mFormatFlags & kAudioFormatFlagIsSignedInteger); } |
| bool isFloat() const final { return isPCM() && (m_streamDescription.mFormatFlags & kAudioFormatFlagIsFloat); } |
| bool isNativeEndian() const final { return isPCM() && (m_streamDescription.mFormatFlags & kAudioFormatFlagIsBigEndian) == kAudioFormatFlagsNativeEndian; } |
| |
| uint32_t numberOfInterleavedChannels() const final { return isInterleaved() ? m_streamDescription.mChannelsPerFrame : 1; } |
| uint32_t numberOfChannelStreams() const final { return isInterleaved() ? 1 : m_streamDescription.mChannelsPerFrame; } |
| uint32_t numberOfChannels() const final { return m_streamDescription.mChannelsPerFrame; } |
| uint32_t sampleWordSize() const final { |
| return (m_streamDescription.mBytesPerFrame > 0 && numberOfInterleavedChannels()) ? m_streamDescription.mBytesPerFrame / numberOfInterleavedChannels() : 0; |
| } |
| uint32_t bytesPerFrame() const { return m_streamDescription.mBytesPerFrame; } |
| uint32_t bytesPerPacket() const { return m_streamDescription.mBytesPerPacket; } |
| uint32_t formatFlags() const { return m_streamDescription.mFormatFlags; } |
| |
| bool operator==(const AudioStreamBasicDescription& other) { return m_streamDescription == other; } |
| bool operator!=(const AudioStreamBasicDescription& other) { return !operator == (other); } |
| bool operator==(const AudioStreamDescription& other) |
| { |
| if (other.platformDescription().type != PlatformDescription::CAAudioStreamBasicType) |
| return false; |
| |
| return operator==(*WTF::get<const AudioStreamBasicDescription*>(other.platformDescription().description)); |
| } |
| bool operator!=(const AudioStreamDescription& other) { return !operator == (other); } |
| |
| const AudioStreamBasicDescription& streamDescription() const { return m_streamDescription; } |
| AudioStreamBasicDescription& streamDescription() { return m_streamDescription; } |
| |
| template<class Encoder> void encode(Encoder&) const; |
| template<class Decoder> static bool decode(Decoder&, CAAudioStreamDescription&); |
| |
| private: |
| void calculateFormat(); |
| |
| AudioStreamBasicDescription m_streamDescription; |
| mutable PlatformDescription m_platformDescription; |
| mutable PCMFormat m_format { None }; |
| }; |
| |
| template<class Encoder> |
| void CAAudioStreamDescription::encode(Encoder& encoder) const |
| { |
| encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(&m_streamDescription), sizeof(m_streamDescription), 1); |
| } |
| |
| template<class Decoder> |
| bool CAAudioStreamDescription::decode(Decoder& decoder, CAAudioStreamDescription& description) |
| { |
| return decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(&description.m_streamDescription), sizeof(description.m_streamDescription), 1); |
| } |
| |
| inline CAAudioStreamDescription toCAAudioStreamDescription(const AudioStreamDescription& description) |
| { |
| ASSERT(description.platformDescription().type == PlatformDescription::CAAudioStreamBasicType); |
| return CAAudioStreamDescription(*WTF::get<const AudioStreamBasicDescription*>(description.platformDescription().description)); |
| } |
| |
| } |