1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_FORMATS_WEBM_WEBM_CRYPTO_HELPERS_H_ 6 #define MEDIA_FORMATS_WEBM_WEBM_CRYPTO_HELPERS_H_ 7 8 #include "base/basictypes.h" 9 #include "base/memory/scoped_ptr.h" 10 #include "media/base/decoder_buffer.h" 11 12 namespace media { 13 14 // TODO(xhwang): Figure out the init data type appropriately once it's spec'ed. 15 // See https://www.w3.org/Bugs/Public/show_bug.cgi?id=19096 for more 16 // information. 17 const char kWebMEncryptInitDataType[] = "video/webm"; 18 19 // Fills an initialized DecryptConfig, which can be sent to the Decryptor if 20 // the stream has potentially encrypted frames. Also sets |data_offset| which 21 // indicates where the encrypted data starts. Leaving the IV empty will tell 22 // the decryptor that the frame is unencrypted. Returns true if |data| is valid, 23 // false otherwise, in which case |decrypt_config| and |data_offset| will not be 24 // changed. Current encrypted WebM request for comments specification is here 25 // http://wiki.webmproject.org/encryption/webm-encryption-rfc 26 bool WebMCreateDecryptConfig(const uint8* data, int data_size, 27 const uint8* key_id, int key_id_size, 28 scoped_ptr<DecryptConfig>* decrypt_config, 29 int* data_offset); 30 31 } // namespace media 32 33 #endif // MEDIA_FORMATS_WEBM_WEBM_CRYPT_HELPERS_H_ 34