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// Copyright 2014 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_FORMATS_WEBM_WEBM_CRYPTO_HELPERS_H_
#define MEDIA_FORMATS_WEBM_WEBM_CRYPTO_HELPERS_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/decoder_buffer.h"
namespace media {
// TODO(xhwang): Figure out the init data type appropriately once it's spec'ed.
// See https://www.w3.org/Bugs/Public/show_bug.cgi?id=19096 for more
// information.
const char kWebMEncryptInitDataType[] = "video/webm";
// Fills an initialized DecryptConfig, which can be sent to the Decryptor if
// the stream has potentially encrypted frames. Also sets |data_offset| which
// indicates where the encrypted data starts. Leaving the IV empty will tell
// the decryptor that the frame is unencrypted. Returns true if |data| is valid,
// false otherwise, in which case |decrypt_config| and |data_offset| will not be
// changed. Current encrypted WebM request for comments specification is here
// http://wiki.webmproject.org/encryption/webm-encryption-rfc
bool WebMCreateDecryptConfig(const uint8* data, int data_size,
const uint8* key_id, int key_id_size,
scoped_ptr<DecryptConfig>* decrypt_config,
int* data_offset);
} // namespace media
#endif // MEDIA_FORMATS_WEBM_WEBM_CRYPT_HELPERS_H_
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