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Wrap Init Data in PSSH Box

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The Java APIs only easily expose getting the PSSH data blob, not the full PSSH
box.  So that apps do not have to do extra work, wrapping the PSSH data blob in a
PSSH box again, we do it for them in the DrmPlugin.

Includes requisite changes to the Unit tests

Bug: 8584241

Merge of https://widevine-internal-review.googlesource.com/#/c/5142/
from the Widevine CDM repository.

Change-Id: Ifb5910dd52380e1b591ecdf1e4273c8d9f3294cc
This commit is contained in:
Jeff Tinker
2013-04-23 15:57:10 -07:00
parent 1aff209f91
commit 8f7ed34c3a
2 changed files with 39 additions and 11 deletions
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22
libwvdrmengine/mediadrm/src/WVDrmPlugin.cpp
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@@ -8,6 +8,7 @@
#include "WVDrmPlugin.h"
#include <endian.h>
#include <sstream>
#include <string>
#include <vector>
@@ -129,9 +130,24 @@ status_t WVDrmPlugin::getKeyRequest(
} else {
return android::ERROR_DRM_CANNOT_HANDLE;
}
CdmSessionId cdmSessionId(sessionId.begin(), sessionId.end());
CdmInitData cdmInitData(initData.begin(), initData.end());
// Build PSSH box for PSSH data in initData.
static const char psshPrefix[] = {
0, 0, 0, 0, // Total size
'p', 's', 's', 'h', // "PSSH"
0, 0, 0, 0, // Flags - must be zero
0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE, // Widevine UUID
0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED,
0, 0, 0, 0 // Size of initData
};
CdmInitData psshBox(psshPrefix, sizeof(psshPrefix) / sizeof(uint8_t));
psshBox.append(reinterpret_cast<const char*>(initData.array()),
initData.size());
uint32_t* psshBoxSize = reinterpret_cast<uint32_t*>(&psshBox[0]);
uint32_t* initDataSize = reinterpret_cast<uint32_t*>(&psshBox[28]);
*initDataSize = htonl(initData.size());
*psshBoxSize = htonl(psshBox.size());
CdmAppParameterMap cdmParameters;
for (size_t i = 0; i < optionalParameters.size(); ++i) {
@@ -147,7 +163,7 @@ status_t WVDrmPlugin::getKeyRequest(
CdmKeyMessage keyRequest;
string cdmDefaultUrl;
CdmResponseType res = mCDM->GenerateKeyRequest(cdmSessionId, cdmInitData,
CdmResponseType res = mCDM->GenerateKeyRequest(cdmSessionId, psshBox,
cdmLicenseType,
cdmParameters, &keyRequest,
&cdmDefaultUrl);