Bug 1041384 - Update GMP APIs for decrypt without decoding and reporting capabilities. r=jesup

content/media/gmp/GMPVideoEncodedFrameImpl.cpp

@@ -51,7 +51,7 @@ GMPVideoEncodedFrameImpl::~GMPVideoEncodedFrameImpl()
   }
 }
 
-const GMPEncryptedBufferData*
+const GMPEncryptedBufferMetadata*
 GMPVideoEncodedFrameImpl::GetDecryptionData() const
 {
   return nullptr;

content/media/gmp/GMPVideoEncodedFrameImpl.h

@@ -91,7 +91,7 @@ public:
   virtual uint8_t* Buffer() MOZ_OVERRIDE;
   virtual GMPBufferType BufferType() const MOZ_OVERRIDE;
   virtual void     SetBufferType(GMPBufferType aBufferType) MOZ_OVERRIDE;
-  virtual const    GMPEncryptedBufferData* GetDecryptionData() const MOZ_OVERRIDE;
+  virtual const    GMPEncryptedBufferMetadata* GetDecryptionData() const MOZ_OVERRIDE;
 
 private:
   void DestroyBuffer();

content/media/gmp/gmp-api/gmp-audio-samples.h

@@ -49,9 +49,9 @@ public:
   virtual const uint8_t* Buffer() const = 0;
   virtual uint8_t*       Buffer() = 0;
 
-  // Get data describing how this frame is encrypted, or nullptr if the
+  // Get metadata describing how this frame is encrypted, or nullptr if the
   // buffer is not encrypted.
-  virtual const GMPEncryptedBufferData* GetDecryptionData() const = 0;
+  virtual const GMPEncryptedBufferMetadata* GetDecryptionData() const = 0;
 };
 
 #endif // GMP_AUDIO_FRAME_h_

content/media/gmp/gmp-api/gmp-decryption.h

@@ -19,7 +19,7 @@
 
 #include "gmp-platform.h"
 
-class GMPEncryptedBufferData {
+class GMPEncryptedBufferMetadata {
 public:
   // Key ID to identify the decryption key.
   virtual const uint8_t* KeyId() const = 0;
@@ -33,14 +33,23 @@ public:
   // Size (in bytes) of |IV|.
   virtual uint32_t IVSize() const = 0;
 
-  // Number of enties returned by ClearBytes and CipherBytes().
+  // Number of entries returned by ClearBytes() and CipherBytes().
   virtual uint32_t NumSubsamples() const = 0;
 
-  virtual const uint32_t* ClearBytes() const = 0;
+  virtual const uint16_t* ClearBytes() const = 0;
 
   virtual const uint32_t* CipherBytes() const = 0;
 };
 
+class GMPBuffer {
+public:
+  virtual uint32_t Id() const = 0;
+  virtual uint8_t* Data() = 0;
+  virtual uint32_t Size() const = 0;
+  virtual void Resize(uint32_t aSize) = 0;
+  virtual ~GMPBuffer() {}
+};
+
 // These match to the DOMException codes as per:
 // http://www.w3.org/TR/dom/#domexception
 enum GMPDOMException {
@@ -60,23 +69,45 @@ enum GMPDOMException {
 // Time in milliseconds, as offset from epoch, 1 Jan 1970.
 typedef int64_t GMPTimestamp;
 
+// Capability definitions. The capabilities of the EME GMP are reported
+// to Gecko by calling the GMPDecryptorCallback::SetCapabilities()
+// callback and specifying the logical OR of the GMP_EME_CAP_* flags below.
+//
+// Note the DECRYPT and the DECRYPT_AND_DECODE are mutually exclusive;
+// only one mode should be reported for each stream type, but different
+// modes can be reported for different stream types.
+//
+// Note: Gecko does not currently support the caps changing at runtime.
+// Set them once per plugin initialization, during the startup of
+// the GMPdecryptor.
+
+// Capability; CDM can decrypt encrypted buffers and return still
+// compressed buffers back to Gecko for decompression there.
+#define GMP_EME_CAP_DECRYPT_AUDIO (uint64_t(1) << 0)
+#define GMP_EME_CAP_DECRYPT_VIDEO (uint64_t(1) << 1)
+
+// Capability; CDM can decrypt and then decode encrypted buffers,
+// and return decompressed samples to Gecko for playback.
+#define GMP_EME_CAP_DECRYPT_AND_DECODE_AUDIO (uint64_t(1) << 2)
+#define GMP_EME_CAP_DECRYPT_AND_DECODE_VIDEO (uint64_t(1) << 3)
+
 class GMPDecryptorCallback {
 public:
   // Resolves a promise for a session created or loaded.
   // Passes the session id to be exposed to JavaScript.
-  // Must be called before OnSessionMessage().
+  // Must be called before SessionMessage().
   // aSessionId must be null terminated.
-  virtual void OnResolveNewSessionPromise(uint32_t aPromiseId,
+  virtual void ResolveNewSessionPromise(uint32_t aPromiseId,
                                         const char* aSessionId,
                                         uint32_t aSessionIdLength) = 0;
 
   // Called to resolve a specified promise with "undefined".
-  virtual void OnResolvePromise(uint32_t aPromiseId) = 0;
+  virtual void ResolvePromise(uint32_t aPromiseId) = 0;
 
   // Called to reject a promise with a DOMException.
   // aMessage is logged to the WebConsole.
   // aMessage is optional, but if present must be null terminated.
-  virtual void OnRejectPromise(uint32_t aPromiseId,
+  virtual void RejectPromise(uint32_t aPromiseId,
                              GMPDOMException aException,
                              const char* aMessage,
                              uint32_t aMessageLength) = 0;
@@ -84,7 +115,7 @@ public:
   // Called by the CDM when it has a message for session |session_id|.
   // Length parameters should not include null termination.
   // aSessionId must be null terminated.
-  virtual void OnSessionMessage(const char* aSessionId,
+  virtual void SessionMessage(const char* aSessionId,
                               uint32_t aSessionIdLength,
                               const uint8_t* aMessage,
                               uint32_t aMessageLength,
@@ -92,39 +123,52 @@ public:
                               uint32_t aDestinationURLLength) = 0;
 
   // aSessionId must be null terminated.
-   virtual void OnExpirationChange(const char* aSessionId,
+   virtual void ExpirationChange(const char* aSessionId,
                                  uint32_t aSessionIdLength,
                                  GMPTimestamp aExpiryTime) = 0;
 
   // Called by the GMP when a session is closed. All file IO
   // that a session requires should be complete before calling this.
   // aSessionId must be null terminated.
-  virtual void OnSessionClosed(const char* aSessionId,
+  virtual void SessionClosed(const char* aSessionId,
                              uint32_t aSessionIdLength) = 0;
 
   // Called by the GMP when an error occurs in a session.
   // aSessionId must be null terminated.
   // aMessage is logged to the WebConsole.
   // aMessage is optional, but if present must be null terminated.
-  virtual void OnSessionError(const char* aSessionId,
+  virtual void SessionError(const char* aSessionId,
                             uint32_t aSessionIdLength,
                             GMPDOMException aException,
                             uint32_t aSystemCode,
                             const char* aMessage,
                             uint32_t aMessageLength) = 0;
 
-  virtual void OnKeyIdUsable(const char* aSessionId,
+  // Marks a key as usable. Gecko will not call into the CDM to decrypt
+  // or decode content encrypted with a key unless the CDM has marked it
+  // usable first. So a CDM *MUST* mark its usable keys as usable!
+  virtual void KeyIdUsable(const char* aSessionId,
                            uint32_t aSessionIdLength,
                            const uint8_t* aKeyId,
                            uint32_t aKeyIdLength) = 0;
 
   // Marks a key as no longer usable.
   // Note: Keys are assumed to be not usable when a session is closed or removed.
-  virtual void OnKeyIdNotUsable(const char* aSessionId,
+  virtual void KeyIdNotUsable(const char* aSessionId,
                               uint32_t aSessionIdLength,
                               const uint8_t* aKeyId,
                               uint32_t aKeyIdLength) = 0;
 
+  // The CDM must report its capabilites of this CDM. aCaps should be a
+  // logical OR of the GMP_EME_CAP_* flags. The CDM *MUST* call this
+  // function and report whether it can decrypt and/or decode. Without
+  // this, Gecko does not know how to use the CDM and will not send
+  // samples to the CDM to decrypt or decrypt-and-decode mode. Note a
+  // CDM cannot change modes once playback has begun.
+  virtual void SetCapabilities(uint64_t aCaps) = 0;
+
+  // Returns decrypted buffer to Gecko, or reports failure.
+  virtual void Decrypted(GMPBuffer* aBuffer, GMPErr aResult) = 0;
 };
 
 // Host interface, passed to GetAPIFunc(), with "decrypt".
@@ -166,10 +210,14 @@ public:
   virtual void Init(GMPDecryptorCallback* aCallback) = 0;
 
   // Requests the creation of a session given |aType| and |aInitData|.
-  // Decryptor should callback GMPDecryptorCallback::OnSessionCreated()
+  // Decryptor should callback GMPDecryptorCallback::SessionCreated()
-  // with the web session ID on success, or OnSessionError() on failure,
+  // with the web session ID on success, or SessionError() on failure,
-  // and then call OnSessionReady() once all keys for that session are
+  // and then call KeyIdUsable() as keys for that session become
-  // available.
+  // usable.
+  //
+  // The CDM must also call GMPDecryptorCallback::SetCapabilities()
+  // exactly once during start up, to inform Gecko whether to use the CDM
+  // in decrypt or decrypt-and-decode mode.
   virtual void CreateSession(uint32_t aPromiseId,
                              const char* aInitDataType,
                              uint32_t aInitDataTypeSize,
@@ -203,6 +251,15 @@ public:
   virtual void SetServerCertificate(uint32_t aPromiseId,
                                     const uint8_t* aServerCert,
                                     uint32_t aServerCertSize) = 0;
+
+  // Asynchronously decrypts aBuffer in place. When the decryption is
+  // complete, GMPDecryptor should write the decrypted data back into the
+  // same GMPBuffer object and return it to Gecko by calling Decrypted(),
+  // with the GMPNoErr successcode. If decryption fails, call Decrypted()
+  // with a failure code, and an error event will fire on the media element.
+  virtual void Decrypt(GMPBuffer* aBuffer,
+                       GMPEncryptedBufferMetadata* aMetadata) = 0;
+
 };
 
 #endif // GMP_DECRYPTION_h_

content/media/gmp/gmp-api/gmp-errors.h

@@ -39,7 +39,7 @@ typedef enum {
   GMPClosedErr = 2,
   GMPAllocErr = 3,
   GMPNotImplementedErr = 4,
-  GMPNotClosedErr = 5,
+  GMPRecordInUse = 5,
   GMPQuotaExceededErr = 6,
   GMPDecodeErr = 7,
   GMPEncodeErr = 8,

content/media/gmp/gmp-api/gmp-storage.h

@@ -21,30 +21,31 @@
 #include <stdint.h>
 
 // Provides basic per-origin storage for CDMs. GMPRecord instances can be
-// retrieved by calling GMPPlatformAPI->openstorage. Multiple GMPRecord
+// retrieved by calling GMPPlatformAPI->openstorage. Multiple GMPRecords
-// can be open at once. This interface is asynchronous, with results
+// with different names can be open at once, but a single record can only
-// being returned via callbacks to the GMPRecordClient pointer provided
+// be opened by one client at a time. This interface is asynchronous, with
-// to the GMPPlatformAPI->openstorage call, on the main thread.
+// results being returned via callbacks to the GMPRecordClient pointer
+// provided to the GMPPlatformAPI->openstorage call, on the main thread.
 class GMPRecord {
 public:
 
-  // Opens the record. Calls OnOpenComplete() once the record is open.
+  // Opens the record. Calls OpenComplete() once the record is open.
-  // Note: OnReadComplete() is only called if this returns GMPNoErr.
+  // Note: OpenComplete() is only called if this returns GMPNoErr.
   virtual GMPErr Open() = 0;
 
-  // Reads the entire contents of the file, and calls
+  // Reads the entire contents of the record, and calls
-  // GMPRecordClient::OnReadComplete() once the operation is complete.
+  // GMPRecordClient::ReadComplete() once the operation is complete.
-  // Note: OnReadComplete() is only called if this returns GMPNoErr.
+  // Note: ReadComplete() is only called if this returns GMPNoErr.
   virtual GMPErr Read() = 0;
 
-  // Writes aDataSize bytes of aData into the file, overwritting the contents
+  // Writes aDataSize bytes of aData into the record, overwriting the
-  // of the file. Overwriting with 0 bytes "deletes" the file.
+  // contents of the record. Overwriting with 0 bytes "deletes" the file.
-  // Write 0 bytes to "delete" a file.
+  // Note: WriteComplete is only called if this returns GMPNoErr.
-  // Note: OnWriteComplete is only called if this returns GMPNoErr.
   virtual GMPErr Write(const uint8_t* aData, uint32_t aDataSize) = 0;
 
-  // Closes a file. File must not be used after this is called. Cancels all
+  // Closes a record. GMPRecord object must not be used after this is
-  // callbacks.
+  // called, request a new one with GMPPlatformAPI->openstorage to re-open
+  // this record. Cancels all callbacks.
   virtual GMPErr Close() = 0;
 
   virtual ~GMPRecord() {}
@@ -57,32 +58,34 @@ class GMPRecordClient {
 
   // Response to a GMPRecord::Open() call with the open |status|.
   // aStatus values:
-  // - GMPNoErr - File opened successfully. File may be empty.
+  // - GMPNoErr - Record opened successfully. Record may be empty.
-  // - GMPFileInUse - There file is in use by another client.
+  // - GMPRecordInUse - This record is in use by another client.
   // - GMPGenericErr - Unspecified error.
   // Do not use the GMPRecord if aStatus is not GMPNoErr.
-  virtual void OnOpenComplete(GMPErr aStatus) = 0;
+  virtual void OpenComplete(GMPErr aStatus) = 0;
 
-  // Response to a GMPRecord::Read() call, where aData is the file contents,
+  // Response to a GMPRecord::Read() call, where aData is the record contents,
   // of length aDataSize.
-  // aData is only valid for the duration of the call to OnReadComplete.
+  // aData is only valid for the duration of the call to ReadComplete.
   // Copy it if you want to hang onto it!
   // aStatus values:
-  // - GMPNoErr - File contents read successfully, aDataSize 0 means file
+  // - GMPNoErr - Record contents read successfully, aDataSize 0 means record
   //   is empty.
-  // - GMPFileInUse - There are other operations or clients in use on this file.
+  // - GMPRecordInUse - There are other operations or clients in use on
+  //   this record.
   // - GMPGenericErr - Unspecified error.
   // Do not continue to use the GMPRecord if aStatus is not GMPNoErr.
-  virtual void OnReadComplete(GMPErr aStatus,
+  virtual void ReadComplete(GMPErr aStatus,
                             const uint8_t* aData,
                             uint32_t aDataSize) = 0;
 
   // Response to a GMPRecord::Write() call.
   // - GMPNoErr - File contents written successfully.
-  // - GMPFileInUse - There are other operations or clients in use on this file.
+  // - GMPRecordInUse - There are other operations or clients in use on
-  // - GMPGenericErr - Unspecified error. File should be regarded as corrupt.
+  //   this record.
+  // - GMPGenericErr - Unspecified error.
   // Do not continue to use the GMPRecord if aStatus is not GMPNoErr.
-  virtual void OnWriteComplete(GMPErr aStatus) = 0;
+  virtual void WriteComplete(GMPErr aStatus) = 0;
 
   virtual ~GMPRecordClient() {}
 };

content/media/gmp/gmp-api/gmp-video-frame-encoded.h

@@ -90,9 +90,9 @@ public:
   virtual GMPBufferType  BufferType() const = 0;
   virtual void     SetBufferType(GMPBufferType aBufferType) = 0;
 
-  // Get data describing how this frame is encrypted, or nullptr if the
+  // Get metadata describing how this frame is encrypted, or nullptr if the
   // frame is not encrypted.
-  virtual const GMPEncryptedBufferData* GetDecryptionData() const = 0;
+  virtual const GMPEncryptedBufferMetadata* GetDecryptionData() const = 0;
 };
 
 #endif // GMP_VIDEO_FRAME_ENCODED_h_