Merge "Break Decrypt Buffers Into 100KiB Blocks As Needed"

libwvdrmengine/cdm/core/include/crypto_session.h

@@ -5,6 +5,7 @@
 
 #include <map>
 #include <string>
+#include <vector>
 
 #include "lock.h"
 #include "oemcrypto_adapter.h"
@@ -143,6 +144,18 @@ class CryptoSession {
       CdmEncryptionAlgorithm algorithm);
   size_t GenericEncryptionBlockSize(CdmEncryptionAlgorithm algorithm);
 
+  // These methods are used when a subsample exceeds the maximum buffer size
+  // that the device can handle.
+  OEMCryptoResult CopyBufferInChunks(
+      const CdmDecryptionParameters& params,
+      OEMCrypto_DestBufferDesc buffer_descriptor);
+  OEMCryptoResult DecryptInChunks(
+      const CdmDecryptionParameters& params,
+      const OEMCrypto_DestBufferDesc& full_buffer_descriptor,
+      const OEMCrypto_CENCEncryptPatternDesc& pattern_descriptor,
+      size_t max_chunk_size);
+  static void IncrementIV(uint64_t increase_by, std::vector<uint8_t>* iv_out);
+
   static const size_t kAes128BlockSize = 16;  // Block size for AES_CBC_128
   static const size_t kSignatureSize = 32;  // size for HMAC-SHA256 signature
   static Lock crypto_lock_;