Implement WebM subsample support

media/formats/webm/webm_constants.h

 // 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_CONSTANTS_H_
 #define MEDIA_FORMATS_WEBM_WEBM_CONSTANTS_H_
 
 #include <stdint.h>
 
 #include "media/base/media_export.h"
@@ skipping 191 matching lines @@
 const int kWebMIdWritingApp = 0x5741;
 
 const int64_t kWebMReservedId = 0x1FFFFFFF;
 const int64_t kWebMUnknownSize = 0x00FFFFFFFFFFFFFFLL;
 
 const uint8_t kWebMFlagKeyframe = 0x80;
 
 // Current encrypted WebM request for comments specification is here
 // http://wiki.webmproject.org/encryption/webm-encryption-rfc
 const uint8_t kWebMFlagEncryptedFrame = 0x1;
+const uint8_t kWebMFlagEncryptedFramePartitioned = 0x2;
 const int kWebMIvSize = 8;
 const int kWebMSignalByteSize = 1;
+const int kWebMEncryptedFrameNumPartitionsSize = 1;
+const int kWebMEncryptedFramePartitionOffsetSize = 4;
 
 // Current specification for WebVTT embedded in WebM
 // http://wiki.webmproject.org/webm-metadata/temporal-metadata/webvtt-in-webm
 
 const int kWebMTrackTypeVideo = 1;
 const int kWebMTrackTypeAudio = 2;
 const int kWebMTrackTypeSubtitlesOrCaptions = 0x11;
 const int kWebMTrackTypeDescriptionsOrMetadata = 0x21;
 
 MEDIA_EXPORT extern const char kWebMCodecSubtitles[];
 MEDIA_EXPORT extern const char kWebMCodecCaptions[];
 MEDIA_EXPORT extern const char kWebMCodecDescriptions[];
 MEDIA_EXPORT extern const char kWebMCodecMetadata[];
 
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_WEBM_WEBM_CONSTANTS_H_