diff options
Diffstat (limited to 'media/libstagefright/httplive/PlaylistFetcher.h')
-rw-r--r-- | media/libstagefright/httplive/PlaylistFetcher.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/media/libstagefright/httplive/PlaylistFetcher.h b/media/libstagefright/httplive/PlaylistFetcher.h index 78dea20..ac04a77 100644 --- a/media/libstagefright/httplive/PlaylistFetcher.h +++ b/media/libstagefright/httplive/PlaylistFetcher.h @@ -119,8 +119,23 @@ private: uint64_t mFirstPTS; int64_t mAbsoluteTimeAnchorUs; + // Stores the initialization vector to decrypt the next block of cipher text, which can + // either be derived from the sequence number, read from the manifest, or copied from + // the last block of cipher text (cipher-block chaining). + unsigned char mAESInitVec[16]; + + // Set first to true if decrypting the first segment of a playlist segment. When + // first is true, reset the initialization vector based on the available + // information in the manifest; otherwise, use the initialization vector as + // updated by the last call to AES_cbc_encrypt. + // + // For the input to decrypt correctly, decryptBuffer must be called on + // consecutive byte ranges on block boundaries, e.g. 0..15, 16..47, 48..63, + // and so on. status_t decryptBuffer( - size_t playlistIndex, const sp<ABuffer> &buffer); + size_t playlistIndex, const sp<ABuffer> &buffer, + bool first = true); + status_t checkDecryptPadding(const sp<ABuffer> &buffer); void postMonitorQueue(int64_t delayUs = 0, int64_t minDelayUs = 0); void cancelMonitorQueue(); |