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Add Support for WebM Back

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Adds support for WebM to the CDM. Decryption remains untouched,
however the initialization data is passed differently for WebM.

The previous version of this change broke playback for certain
apps that were being allowed to pass invalid MIME types before
this change was made. This version maintains backwards-compatiblity
for these apps for now by rewriting their MIME types as "video/mp4".

Merge of https://widevine-internal-review.googlesource.com/9225/
and https://widevine-internal-review.googlesource.com/9611/ from
the Widevine cdm repo.

Bug: 10638562
Change-Id: Ib37e838d08363f07b34b3a2e79a3f80a1f43e9ad
This commit is contained in:
John "Juce" Bruce
2014-03-31 14:12:11 -07:00
parent 66cadaa9fa
commit 702aadf853
16 changed files with 329 additions and 105 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
libwvdrmengine/cdm/core/include/cdm_engine.h
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@@ -37,6 +37,7 @@ class CdmEngine : public TimerHandler {
// Construct a valid license request
virtual CdmResponseType GenerateKeyRequest(const CdmSessionId& session_id,
const CdmKeySetId& key_set_id,
const std::string& mime_type,
const CdmInitData& init_data,
const CdmLicenseType license_type,
CdmAppParameterMap& app_parameters,

5
libwvdrmengine/cdm/core/include/cdm_session.h
View File

@@ -36,7 +36,8 @@ class CdmSession {
bool VerifySession(const CdmKeySystem& key_system,
const CdmInitData& init_data);
CdmResponseType GenerateKeyRequest(const CdmInitData& init_data,
CdmResponseType GenerateKeyRequest(const std::string& mime_type,
const CdmInitData& init_data,
const CdmLicenseType license_type,
const CdmAppParameterMap& app_parameters,
CdmKeyMessage* key_request,
@@ -109,7 +110,7 @@ class CdmSession {
CdmLicenseType license_type_;
// license type offline related information
CdmInitData offline_pssh_data_;
CdmInitData offline_init_data_;
CdmKeyMessage offline_key_request_;
CdmKeyResponse offline_key_response_;
CdmKeyMessage offline_key_renewal_request_;

11
libwvdrmengine/cdm/core/include/license.h
View File

@@ -27,7 +27,8 @@ class CdmLicense {
bool Init(const std::string& token, CryptoSession* session,
PolicyEngine* policy_engine);
bool PrepareKeyRequest(const CdmInitData& pssh_data,
bool PrepareKeyRequest(const std::string& mime_type,
const CdmInitData& init_data,
const CdmLicenseType license_type,
const CdmAppParameterMap& app_parameters,
const CdmSessionId& session_id,
@@ -42,7 +43,7 @@ class CdmLicense {
bool RestoreOfflineLicense(CdmKeyMessage& license_request,
CdmKeyResponse& license_response,
CdmKeyResponse& license_renewal_response);
bool HasInitData() { return !init_data_.empty(); }
bool HasInitData() { return !stored_init_data_.empty(); }
bool IsKeyLoaded(const KeyId& key_id);
private:
@@ -54,12 +55,16 @@ class CdmLicense {
CdmResponseType HandleKeyErrorResponse(
const video_widevine_server::sdk::SignedMessage& signed_message);
template<typename T> bool PrepareContentId(const CdmLicenseType license_type,
const std::string& request_id,
T* content_id);
CryptoSession* session_;
PolicyEngine* policy_engine_;
std::string server_url_;
std::string token_;
std::string service_certificate_;
std::string init_data_;
std::string stored_init_data_;
bool initialized_;
std::set<KeyId> loaded_keys_;

2
libwvdrmengine/cdm/core/include/wv_cdm_constants.h
View File

@@ -56,6 +56,8 @@ static const std::string QUERY_VALUE_SECURITY_LEVEL_L2 = "L2";
static const std::string QUERY_VALUE_SECURITY_LEVEL_L3 = "L3";
static const std::string QUERY_VALUE_SECURITY_LEVEL_Unknown = "Unknown";
static const std::string ISO_BMFF_MIME_TYPE = "video/mp4";
static const std::string WEBM_MIME_TYPE = "video/webm";
} // namespace wvcdm
#endif // CDM_BASE_WV_CDM_CONSTANTS_H_