Add Common Encryption support to BMFF, including subsample decryption.

media/base/decrypt_config.cc

Index: media/base/decrypt_config.cc
diff --git a/media/base/decrypt_config.cc b/media/base/decrypt_config.cc
index fb502df1c8ecefc7368301b66c8992eb72d5ced8..c499c92d66565d6e7f4b130df72adcf2eb4500db 100644
--- a/media/base/decrypt_config.cc
+++ b/media/base/decrypt_config.cc
@@ -8,25 +8,19 @@
 
 namespace media {
 
-DecryptConfig::DecryptConfig(const uint8* key_id, int key_id_size,
-                             const uint8* iv, int iv_size,
-                             const uint8* checksum, int checksum_size,
-                             int encrypted_frame_offset)
-    :  key_id_(new uint8[key_id_size]),
-       key_id_size_(key_id_size),
-       iv_(new uint8[iv_size]),
-       iv_size_(iv_size),
-       checksum_(checksum_size > 0 ? new uint8[checksum_size] : NULL),
-       checksum_size_(checksum_size),
-       encrypted_frame_offset_(encrypted_frame_offset) {
-  CHECK_GT(key_id_size, 0);
-  CHECK_EQ(iv_size, DecryptConfig::kDecryptionKeySize);
-  CHECK_GE(checksum_size, 0);
-  CHECK_GE(encrypted_frame_offset, 0);
-  memcpy(key_id_.get(), key_id, key_id_size);
-  memcpy(iv_.get(), iv, iv_size);
-  if (checksum_size > 0)
-    memcpy(checksum_.get(), checksum, checksum_size);
+DecryptConfig::DecryptConfig(const std::string& key_id,
+                             const std::string& iv,
+                             const std::string& checksum,
+                             const int data_offset,
+                             const std::vector<SubsampleEntry>& subsamples)
+    : key_id_(key_id),
+      iv_(iv),
+      checksum_(checksum),
+      data_offset_(data_offset),
+      subsamples_(subsamples) {
+  CHECK_GT(key_id.size(), 0u);
+  CHECK_EQ(iv.size(), static_cast<size_t>(DecryptConfig::kDecryptionKeySize));
+  CHECK_GE(data_offset, 0);
 }
 
 DecryptConfig::~DecryptConfig() {}