// Copyright 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef MEDIA_BASE_MIME_UTIL_H__ #define MEDIA_BASE_MIME_UTIL_H__ #include #include #include "media/base/media_export.h" namespace media { // Check to see if a particular MIME type is in the list of // supported/recognized MIME types. MEDIA_EXPORT bool IsSupportedMediaMimeType(const std::string& mime_type); // Returns true if and only if all codecs are supported, false otherwise. MEDIA_EXPORT bool AreSupportedMediaCodecs( const std::vector& codecs); // Parses a codec string, populating |codecs_out| with the prefix of each codec // in the string |codecs_in|. For example, passed "aaa.b.c,dd.eee", if // |strip| == true |codecs_out| will contain {"aaa", "dd"}, if |strip| == false // |codecs_out| will contain {"aaa.b.c", "dd.eee"}. // See http://www.ietf.org/rfc/rfc4281.txt. MEDIA_EXPORT void ParseCodecString(const std::string& codecs, std::vector* codecs_out, bool strip); // Check to see if a particular MIME type is in our list which only supports a // certain subset of codecs. MEDIA_EXPORT bool IsStrictMediaMimeType(const std::string& mime_type); // Indicates that the MIME type and (possible codec string) are supported by the // underlying platform. enum SupportsType { // The underlying platform is known not to support the given MIME type and // codec combination. IsNotSupported, // The underlying platform is known to support the given MIME type and codec // combination. IsSupported, // The underlying platform is unsure whether the given MIME type and codec // combination can be rendered or not before actually trying to play it. MayBeSupported }; // Checks the |mime_type| and |codecs| against the MIME types known to support // only a particular subset of codecs. // * Returns IsSupported if the |mime_type| is supported and all the codecs // within the |codecs| are supported for the |mime_type|. // * Returns MayBeSupported if the |mime_type| is supported and is known to // support only a subset of codecs, but |codecs| was empty. Also returned if // all the codecs in |codecs| are supported, but additional codec parameters // were supplied (such as profile) for which the support cannot be decided. // * Returns IsNotSupported if either the |mime_type| is not supported or the // |mime_type| is supported but at least one of the codecs within |codecs| is // not supported for the |mime_type|. MEDIA_EXPORT SupportsType IsSupportedStrictMediaMimeType( const std::string& mime_type, const std::vector& codecs); // Test only method that removes proprietary media types and codecs from the // list of supported MIME types and codecs. These types and codecs must be // removed to ensure consistent layout test results across all Chromium // variations. MEDIA_EXPORT void RemoveProprietaryMediaTypesAndCodecsForTests(); } // namespace media #endif // MEDIA_BASE_MIME_UTIL_H__