From 2eb62955eb84b97695e8a7e56e14310cbb86412b Mon Sep 17 00:00:00 2001
From: Glenn Kasten <gkasten@google.com>
Date: Fri, 28 Jan 2011 12:37:51 -0800
Subject: Bug 3012968 DRM output control

Modifies Stagefright to verify that there is a hardware-protected path
to video sink for DRM content.

Change-Id: I18b8741390e803a05a88c7f180b860a24ba88a10
---
 media/libstagefright/AwesomePlayer.cpp | 14 ++++++++++++++
 media/libstagefright/OMXCodec.cpp      | 10 ++++++++++
 2 files changed, 24 insertions(+)

(limited to 'media/libstagefright')

diff --git a/media/libstagefright/AwesomePlayer.cpp b/media/libstagefright/AwesomePlayer.cpp
index 4c744bd..5734c7e 100644
--- a/media/libstagefright/AwesomePlayer.cpp
+++ b/media/libstagefright/AwesomePlayer.cpp
@@ -45,6 +45,7 @@
 #include <surfaceflinger/Surface.h>
 #include <gui/ISurfaceTexture.h>
 #include <gui/SurfaceTextureClient.h>
+#include <surfaceflinger/ISurfaceComposer.h>
 
 #include <media/stagefright/foundation/ALooper.h>
 #include <media/stagefright/foundation/AMessage.h>
@@ -1189,6 +1190,19 @@ void AwesomePlayer::setVideoSource(sp<MediaSource> source) {
 }
 
 status_t AwesomePlayer::initVideoDecoder(uint32_t flags) {
+
+    // Either the application or the DRM system can independently say
+    // that there must be a hardware-protected path to an external video sink.
+    // For now we always require a hardware-protected path to external video sink
+    // if content is DRMed, but eventually this could be optional per DRM agent.
+    // When the application wants protection, then
+    //   (USE_SURFACE_ALLOC && (mSurface != 0) &&
+    //   (mSurface->getFlags() & ISurfaceComposer::eProtectedByApp))
+    // will be true, but that part is already handled by SurfaceFlinger.
+    if (mDecryptHandle != NULL) {
+        flags |= OMXCodec::kEnableGrallocUsageProtected;
+    }
+    LOGV("initVideoDecoder flags=0x%x", flags);
     mVideoSource = OMXCodec::Create(
             mClient.interface(), mVideoTrack->getFormat(),
             false, // createEncoder
diff --git a/media/libstagefright/OMXCodec.cpp b/media/libstagefright/OMXCodec.cpp
index 4a94e0d..3e26a95 100644
--- a/media/libstagefright/OMXCodec.cpp
+++ b/media/libstagefright/OMXCodec.cpp
@@ -528,6 +528,12 @@ status_t OMXCodec::configureCodec(const sp<MetaData> &meta, uint32_t flags) {
         mOnlySubmitOneBufferAtOneTime = true;
     }
 
+    mEnableGrallocUsageProtected = false;
+    if (flags & kEnableGrallocUsageProtected) {
+        mEnableGrallocUsageProtected = true;
+    }
+    LOGV("configureCodec protected=%d", mEnableGrallocUsageProtected);
+
     if (!(flags & kIgnoreCodecSpecificData)) {
         uint32_t type;
         const void *data;
@@ -1751,7 +1757,11 @@ status_t OMXCodec::allocateOutputBuffersFromNativeWindow() {
         // XXX: Currently this error is logged, but not fatal.
         usage = 0;
     }
+    if (mEnableGrallocUsageProtected) {
+        usage |= GRALLOC_USAGE_PROTECTED;
+    }
 
+    LOGV("native_window_set_usage usage=0x%x", usage);
     err = native_window_set_usage(
             mNativeWindow.get(), usage | GRALLOC_USAGE_HW_TEXTURE | GRALLOC_USAGE_EXTERNAL_DISP);
     if (err != 0) {
-- 
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