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// 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 <string>
#include <vector>
#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);
// 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<std::string>* codecs_out,
bool strip);
// Indicates that the MIME type and (possible codec string) are supported.
enum SupportsType {
// The given MIME type and codec combination is not supported.
IsNotSupported,
// The given MIME type and codec combination is supported.
IsSupported,
// There's not enough information to determine if 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
IsSupportedMediaFormat(const std::string& mime_type,
const std::vector<std::string>& codecs);
// Similar to the above, but for encrypted formats.
MEDIA_EXPORT SupportsType
IsSupportedEncryptedMediaFormat(const std::string& mime_type,
const std::vector<std::string>& 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_
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