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// Copyright (c) 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.
#include "webkit/media/key_systems.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
namespace webkit_media {
namespace {
const char kClearKeyKeySystem[] = "webkit-org.w3.clearkey";
struct MediaFormatAndKeySystem {
const char* mime_type;
const char* codec;
const char* key_system;
};
static const MediaFormatAndKeySystem
supported_format_key_system_combinations[] = {
// TODO(ddorwin): Reconsider based on how usage of this class evolves.
// For now, this class is stateless, so we do not have the opportunity to
// build a list using ParseCodecString() like
// net::MimeUtil::InitializeMimeTypeMaps(). Therfore, the following line must
// be separate entries.
// { "video/webm", "vorbis,vp8,vp8.0", kClearKeyKeySystem },
{ "video/webm", "vorbis", kClearKeyKeySystem },
{ "video/webm", "vp8", kClearKeyKeySystem },
{ "video/webm", "vp8.0", kClearKeyKeySystem },
{ "audio/webm", "vorbis", kClearKeyKeySystem },
{ "video/webm", "", kClearKeyKeySystem },
{ "audio/webm", "", kClearKeyKeySystem }
};
bool IsSupportedKeySystemWithContainerAndCodec(const std::string& mime_type,
const std::string& codec,
const std::string& key_system) {
for (size_t i = 0;
i < arraysize(supported_format_key_system_combinations);
++i) {
const MediaFormatAndKeySystem& combination =
supported_format_key_system_combinations[i];
if (combination.mime_type == mime_type &&
combination.codec == codec &&
combination.key_system == key_system)
return true;
}
return false;
}
} // namespace
bool IsSupportedKeySystem(const WebKit::WebString& key_system) {
if (key_system == kClearKeyKeySystem)
return true;
return false;
}
bool IsSupportedKeySystemWithMediaMimeType(
const std::string& mime_type,
const std::vector<std::string>& codecs,
const std::string& key_system) {
if (codecs.empty())
return IsSupportedKeySystemWithContainerAndCodec(mime_type, "", key_system);
for (size_t i = 0; i < codecs.size(); ++i) {
if (!IsSupportedKeySystemWithContainerAndCodec(
mime_type, codecs[i], key_system))
return false;
}
return true;
}
} // namespace webkit_media
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