Support EGLStream video streaming on QNX platform

On QNX platform, we implement video streaming via OpenGL
EGLStream streams. Changes were added to StreamVideo class
to support EGLStream objects. For non-QNX platforms, we
kept the StreamVideoNode class unchanged - assuming other
platforms will continue to support streaming via EGLImage
objects.

On QNX, cc::StreamVideoDrawQuad contains an
external OES texture that is associated with an
EGLStream. Before we draw with that texture, an
'acquire' is performed to grab latest video frame.
See EGL_KHR_stream specs from Khronos.

Change-Id: Ia3fe25e9047f475594a55591e3e11caa0eab1e6a
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/core/chromium_gpu_helper.cpp b/src/core/chromium_gpu_helper.cpp
index 8782f5d98..663b1ec17 100644
--- a/src/core/chromium_gpu_helper.cpp
+++ b/src/core/chromium_gpu_helper.cpp
@@ -51,6 +51,12 @@
 #include "gpu/command_buffer/service/mailbox_manager.h"
 #include "gpu/command_buffer/service/texture_manager.h"
 
+#include <QtGlobal> // We need this for the Q_OS_QNX define.
+
+#ifdef Q_OS_QNX
+#include "content/common/gpu/stream_texture_qnx.h"
+#endif
+
 static void addSyncPointCallbackDelegate(content::SyncPointManager *syncPointManager, uint32 sync_point, const base::Closure& callback)
 {
     syncPointManager->AddSyncPointCallback(sync_point, callback);
@@ -112,3 +118,15 @@ unsigned int service_id(gpu::gles2::Texture *tex)
 {
     return tex->service_id();
 }
+
+#ifdef Q_OS_QNX
+EGLStreamData eglstream_connect_consumer(gpu::gles2::Texture *tex)
+{
+    EGLStreamData egl_stream;
+    content::StreamTexture* image = static_cast<content::StreamTexture *>(tex->GetLevelImage(GL_TEXTURE_EXTERNAL_OES, 0));
+    if (image) {
+        image->ConnectConsumerIfNeeded(&egl_stream.egl_display, &egl_stream.egl_str_handle);
+    }
+    return egl_stream;
+}
+#endif