150 lines
4.4 KiB
C++
150 lines
4.4 KiB
C++
/*
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* Copyright (C) 2019-2021 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "MIMETypeCache.h"
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#include "ContentType.h"
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namespace WebCore {
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HashSet<String, ASCIICaseInsensitiveHash>& MIMETypeCache::supportedTypes()
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{
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if (!m_supportedTypes) {
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m_supportedTypes = HashSet<String, ASCIICaseInsensitiveHash> { };
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initializeCache(*m_supportedTypes);
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}
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return *m_supportedTypes;
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}
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bool MIMETypeCache::supportsContainerType(const String& containerType)
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{
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if (!isAvailable() || containerType.isEmpty())
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return false;
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if (isUnsupportedContainerType(containerType))
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return false;
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return isStaticContainerType(containerType) || supportedTypes().contains(containerType);
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}
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MediaPlayerEnums::SupportsType MIMETypeCache::canDecodeType(const String& mimeType)
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{
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if (mimeType.isEmpty())
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return MediaPlayerEnums::SupportsType::IsNotSupported;
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if (m_cachedResults) {
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auto it = m_cachedResults->find(mimeType);
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if (it != m_cachedResults->end())
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return it->value;
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}
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auto result = MediaPlayerEnums::SupportsType::IsNotSupported;
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do {
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if (!isAvailable() || mimeType.isEmpty())
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break;
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auto contentType = ContentType { mimeType };
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auto containerType = contentType.containerType();
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if (!supportsContainerType(containerType))
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break;
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if (contentType.codecs().isEmpty()) {
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result = MediaPlayerEnums::SupportsType::MayBeSupported;
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break;
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}
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if (shouldOverrideExtendedType(contentType)) {
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result = MediaPlayerEnums::SupportsType::IsSupported;
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break;
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}
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if (canDecodeExtendedType(contentType))
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result = MediaPlayerEnums::SupportsType::IsSupported;
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} while (0);
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if (!m_cachedResults)
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m_cachedResults = HashMap<String, MediaPlayerEnums::SupportsType, ASCIICaseInsensitiveHash>();
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m_cachedResults->add(mimeType, result);
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return result;
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}
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void MIMETypeCache::addSupportedTypes(const Vector<String>& newTypes)
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{
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if (!m_supportedTypes)
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m_supportedTypes = HashSet<String, ASCIICaseInsensitiveHash> { };
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for (auto& type : newTypes)
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m_supportedTypes->add(type);
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}
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bool MIMETypeCache::isStaticContainerType(StringView)
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{
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return false;
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}
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bool MIMETypeCache::isUnsupportedContainerType(const String&)
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{
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return false;
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}
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bool MIMETypeCache::isAvailable() const
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{
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return true;
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}
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bool MIMETypeCache::isEmpty() const
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{
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return m_supportedTypes && m_supportedTypes->isEmpty();
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}
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void MIMETypeCache::initializeCache(HashSet<String, ASCIICaseInsensitiveHash>&)
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{
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}
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bool MIMETypeCache::canDecodeExtendedType(const ContentType&)
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{
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return false;
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}
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bool MIMETypeCache::shouldOverrideExtendedType(const ContentType& type)
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{
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ASSERT(canDecodeType(type.containerType()) != MediaPlayerEnums::SupportsType::IsNotSupported);
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// Some sites (e.g. Modernizr) use 'audio/mpeg; codecs="mp3"' even though
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// it is not RFC 3003 compliant.
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if (equalIgnoringASCIICase(type.containerType(), "audio/mpeg")) {
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auto codecs = type.codecs();
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return codecs.size() == 1 && codecs[0] == "mp3";
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}
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return false;
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}
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}
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