[RFC v1 2/4] display-channel: Add the asyncs associated with dmabuf encode

[Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>]

This async is triggered by the encoder indicating that the
encoding process is completed.

Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
Cc: Dongwon Kim <dongwon.kim@xxxxxxxxx>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
---
 server/display-channel.cpp |  9 +++++++++
 server/display-channel.h   |  2 ++
 server/red-qxl.cpp         | 26 ++++++++++++++++++++++++++
 server/red-qxl.h           |  1 +
 server/spice-qxl.h         |  2 ++
 server/spice-server.syms   |  1 +
 6 files changed, 41 insertions(+)

diff --git a/server/display-channel.cpp b/server/display-channel.cpp
index 4bd0cf41..81df5420 100644
--- a/server/display-channel.cpp
+++ b/server/display-channel.cpp
@@ -2334,6 +2334,15 @@ void display_channel_gl_draw_done(DisplayChannel *display)
     set_gl_draw_async_count(display, display->priv->gl_draw_async_count - 1);
 }
 
+void display_channel_encode_done(DisplayChannel *display,
+                                 RedDrawable *red_drawable)
+{
+    if (red_drawable->dmabuf_fd > 0) {
+        red_qxl_dmabuf_encode_async_complete(display->priv->qxl);
+        red_drawable->dmabuf_fd = 0;
+    }
+}
+
 int display_channel_get_video_stream_id(DisplayChannel *display, VideoStream *stream)
 {
     return static_cast<int>(stream - display->priv->streams_buf.data());
diff --git a/server/display-channel.h b/server/display-channel.h
index c54df25c..0a1e520c 100644
--- a/server/display-channel.h
+++ b/server/display-channel.h
@@ -127,6 +127,8 @@ void                       display_channel_gl_scanout                (DisplayCha
 void                       display_channel_gl_draw                   (DisplayChannel *display,
                                                                       SpiceMsgDisplayGlDraw *draw);
 void                       display_channel_gl_draw_done              (DisplayChannel *display);
+void                       display_channel_encode_done               (DisplayChannel *display,
+                                                                      RedDrawable *drawable);
 
 void display_channel_process_draw(DisplayChannel *display,
                                   red::shared_ptr<RedDrawable> &&red_drawable,
diff --git a/server/red-qxl.cpp b/server/red-qxl.cpp
index 48c293ae..42a4029b 100644
--- a/server/red-qxl.cpp
+++ b/server/red-qxl.cpp
@@ -493,6 +493,32 @@ void red_qxl_gl_draw_async_complete(QXLInstance *qxl)
     red_qxl_async_complete(qxl, cookie);
 }
 
+SPICE_GNUC_VISIBLE
+void spice_qxl_dmabuf_encode_async(QXLInstance *qxl,
+                                   int fd, uint64_t cookie)
+{
+    QXLState *qxl_state;
+
+    spice_return_if_fail(qxl != nullptr);
+    qxl_state = qxl->st;
+
+    qxl_state->scanout.drm_dma_buf_fd = fd;
+    qxl_state->gl_draw_cookie = cookie;
+}
+
+void red_qxl_dmabuf_encode_async_complete(QXLInstance *qxl)
+{
+    QXLState *qxl_state = qxl->st;
+    uint64_t cookie = qxl->st->gl_draw_cookie;
+
+    if (cookie == GL_DRAW_COOKIE_INVALID) {
+        return;
+    }
+    qxl_state->scanout.drm_dma_buf_fd = 0;
+    qxl->st->gl_draw_cookie = GL_DRAW_COOKIE_INVALID;
+    red_qxl_async_complete(qxl, cookie);
+}
+
 SPICE_GNUC_VISIBLE
 void spice_qxl_set_device_info(QXLInstance *instance,
                                const char *device_address,
diff --git a/server/red-qxl.h b/server/red-qxl.h
index 2084acb1..e8e7c373 100644
--- a/server/red-qxl.h
+++ b/server/red-qxl.h
@@ -40,6 +40,7 @@ bool red_qxl_get_allow_client_mouse(QXLInstance *qxl, int *x_res, int *y_res, in
 SpiceMsgDisplayGlScanoutUnix *red_qxl_get_gl_scanout(QXLInstance *qxl);
 void red_qxl_put_gl_scanout(QXLInstance *qxl, SpiceMsgDisplayGlScanoutUnix *scanout);
 void red_qxl_gl_draw_async_complete(QXLInstance *qxl);
+void red_qxl_dmabuf_encode_async_complete(QXLInstance *qxl);
 int red_qxl_check_qxl_version(QXLInstance *qxl, int major, int minor);
 SpiceServer* red_qxl_get_server(QXLState *qxl);
 uint32_t red_qxl_marshall_device_display_info(const QXLInstance *qxl, SpiceMarshaller *m);
diff --git a/server/spice-qxl.h b/server/spice-qxl.h
index bf17476b..ca9816ec 100644
--- a/server/spice-qxl.h
+++ b/server/spice-qxl.h
@@ -92,6 +92,8 @@ void spice_qxl_gl_draw_async(QXLInstance *qxl,
                              uint32_t x, uint32_t y,
                              uint32_t w, uint32_t h,
                              uint64_t cookie);
+void spice_qxl_dmabuf_encode_async(QXLInstance *qxl,
+                                   int fd, uint64_t cookie);
 
 /* since spice 0.14.2 */
 
diff --git a/server/spice-server.syms b/server/spice-server.syms
index 8da46c20..9748cc24 100644
--- a/server/spice-server.syms
+++ b/server/spice-server.syms
@@ -182,4 +182,5 @@ SPICE_SERVER_0.14.3 {
 global:
     spice_server_get_video_codecs;
     spice_server_free_video_codecs;
+    spice_qxl_dmabuf_encode_async;
 } SPICE_SERVER_0.14.2;
-- 
2.37.2