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Correct native API documentation related to MediaDrm offline use case

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These doc updates were made previously to the java API but some
did not make it into the native API.

Change-Id: I9b7bfcd77bc593685254baca1c148deb7e1f91c7
related-to-bug: 8621588
This commit is contained in:
Jeff Tinker 2013-05-07 14:07:10 -07:00
parent 223b953cf7
commit b84d1cad1d
1 changed files with 33 additions and 11 deletions
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44
include/media/drm/DrmAPI.h
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@ -80,10 +80,12 @@ namespace android {
// Drm keys can be for offline content or for online streaming.
// Offline keys are persisted on the device and may be used when the device
// is disconnected from the network.
// is disconnected from the network. The Release type is used to request
// that offline keys be no longer restricted to offline use.
enum KeyType {
kKeyType_Offline,
kKeyType_Streaming
kKeyType_Streaming,
kKeyType_Release
};
DrmPlugin() {}
@ -101,35 +103,55 @@ namespace android {
// is used to obtain an opaque key request blob that is delivered to the
// license server.
//
// The scope parameter may be a sessionId or a keySetId, depending on the
// specified keyType. When the keyType is kKeyType_Offline or
// kKeyType_Streaming, scope should be set to the sessionId the keys will be
// provided to. When the keyType is kKeyType_Release, scope should be set to
// the keySetId of the keys being released. Releasing keys from a device
// invalidates them for all sessions.
//
// The init data passed to getKeyRequest is container-specific and its
// meaning is interpreted based on the mime type provided in the mimeType
// parameter to getKeyRequest. It could contain, for example, the content
// ID, key ID or other data obtained from the content metadata that is required
// in generating the key request.
// in generating the key request. Init may be null when keyType is
// kKeyType_Release.
//
// keyType specifes if the keys are to be used for streaming or offline content
// mimeType identifies the mime type of the content
//
// keyType specifies if the keys are to be used for streaming or offline content
//
// optionalParameters are included in the key request message to allow a
// client application to provide additional message parameters to the server.
//
// If successful, the opaque key request blob is returned to the caller.
virtual status_t
getKeyRequest(Vector<uint8_t> const &sessionId,
getKeyRequest(Vector<uint8_t> const &scope,
Vector<uint8_t> const &initData,
String8 const &mimeType, KeyType keyType,
KeyedVector<String8, String8> const &optionalParameters,
Vector<uint8_t> &request, String8 &defaultUrl) = 0;
//
// After a key response is received by the app, it is provided to the
// Drm plugin using provideKeyResponse. Returns the id of the key set
// in keySetId. The keySetId can be used by removeKeys or restoreKeys
// when the keys are used for offline content.
virtual status_t provideKeyResponse(Vector<uint8_t> const &sessionId,
// Drm plugin using provideKeyResponse.
//
// scope may be a sessionId or a keySetId depending on the type of the
// response. Scope should be set to the sessionId when the response is
// for either streaming or offline key requests. Scope should be set to the
// keySetId when the response is for a release request.
//
// When the response is for an offline key request, a keySetId is returned
// in the keySetId vector parameter that can be used to later restore the
// keys to a new session with the method restoreKeys. When the response is
// for a streaming or release request, no keySetId is returned.
//
virtual status_t provideKeyResponse(Vector<uint8_t> const &scope,
Vector<uint8_t> const &response,
Vector<uint8_t> &keySetId) = 0;
// Remove the persisted keys associated with an offline license for a session.
virtual status_t removeKeys(Vector<uint8_t> const &keySetId) = 0;
// Remove the current keys from a session
virtual status_t removeKeys(Vector<uint8_t> const &sessionId) = 0;
// Restore persisted offline keys into a new session. keySetId identifies
// the keys to load, obtained from a prior call to provideKeyResponse().