Add vaSyncBuffer for output buffers synchronization

Added notes about different ways for synchronization.

Signed-off-by: Dmitry Ermilov <dmitry.ermilov@intel.com>

5 files changed, 93 insertions, 1 deletions

diff --git a/va/va.c b/va/va.c
index 4bbd3e5..4f06a34 100644
--- a/va/va.c
+++ b/va/va.c
@@ -1700,6 +1700,29 @@ VAStatus vaQuerySurfaceError (
   return va_status;
 }
 
+VAStatus vaSyncBuffer (
+    VADisplay dpy,
+    VABufferID buf_id,
+    uint64_t timeout_ns
+)
+{
+  VAStatus va_status;
+  VADriverContextP ctx;
+
+  CHECK_DISPLAY(dpy);
+  ctx = CTX(dpy);
+
+  VA_TRACE_LOG(va_TraceSyncBuffer, dpy, buf_id, timeout_ns);
+
+  if (ctx->vtable->vaSyncBuffer)
+      va_status = ctx->vtable->vaSyncBuffer( ctx, buf_id, timeout_ns );
+  else
+      va_status = VA_STATUS_ERROR_UNIMPLEMENTED;
+  VA_TRACE_RET(dpy, va_status);
+
+  return va_status;
+}
+
 /* Get maximum number of image formats supported by the implementation */
 int vaMaxNumImageFormats (
     VADisplay dpy
diff --git a/va/va.h b/va/va.h
index fda8673..4c67546 100644
--- a/va/va.h
+++ b/va/va.h
@@ -3811,6 +3811,46 @@ VAStatus vaQuerySurfaceError(
 );
 
 /**
+ * \brief Synchronizes pending operations associated with the supplied buffer.
+ *
+ * This function blocks during specified timeout (in nanoseconds) until
+ * all pending operations on the supplied buffer have been completed.
+ * If timeout is zero, the function returns immediately.
+ *
+ * Possible errors:
+ * - \ref VA_STATUS_ERROR_UNIMPLEMENTED: the VA driver implementation
+ *   does not support this interface
+ * - \ref VA_STATUS_ERROR_INVALID_DISPLAY: an invalid display was supplied
+ * - \ref VA_STATUS_ERROR_INVALID_BUFFER: an invalid buffer was supplied
+ * - \ref VA_STATUS_ERROR_TIMEDOUT: synchronization is still in progress,
+ *   client should call the function again to complete synchronization
+ *
+ * @param[in] dpy         the VA display
+ * @param[in] buf_id      the buffer for which synchronization is performed
+ * @param[in] timeout_ns  the timeout in nanoseconds
+ *
+ */
+VAStatus vaSyncBuffer(
+    VADisplay dpy,
+    VABufferID buf_id,
+    uint64_t timeout_ns
+);
+
+/**
+ * Notes about synchronization interfaces:
+ * vaSyncSurface:
+ * 1. Allows to synchronize output surface (i.e. from decoding or VP)
+ * 2. Allows to synchronize all bitstreams being encoded from the given input surface (1->N pipelines).
+ *
+ * vaSyncSurface2:
+ * 1. The same as vaSyncSurface but allows to specify a timeout
+ *
+ * vaSyncBuffer:
+ * 1. Allows to synchronize output buffer (e.g. bitstream from encoding).
+ *    Comparing to vaSyncSurface this function synchronizes given bitstream only.
+ */
+
+/**
  * Images and Subpictures
  * VAImage is used to either get the surface data to client memory, or 
  * to copy image data in client memory to a surface. 
diff --git a/va/va_backend.h b/va/va_backend.h
index f3d8998..5ab8f6a 100644
--- a/va/va_backend.h
+++ b/va/va_backend.h
@@ -491,8 +491,14 @@ struct VADriverVTable
             uint64_t timeout_ns
         );
 
+        VAStatus (*vaSyncBuffer) (
+            VADriverContextP ctx,
+            VABufferID buf_id,
+            uint64_t timeout_ns
+        );
+
         /** \brief Reserved bytes for future use, must be zero */
-        unsigned long reserved[56];
+        unsigned long reserved[55];
 };
 
 struct VADriverContext
diff --git a/va/va_trace.c b/va/va_trace.c
index f726b50..1de3d9d 100644
--- a/va/va_trace.c
+++ b/va/va_trace.c
@@ -5536,6 +5536,23 @@ void va_TraceQuerySurfaceError(
     DPY2TRACE_VIRCTX_EXIT(pva_trace);
 }
 
+void va_TraceSyncBuffer(
+    VADisplay dpy,
+    VABufferID buf_id,
+    uint64_t timeout_ns
+)
+{
+    DPY2TRACE_VIRCTX(dpy);
+
+    TRACE_FUNCNAME(idx);
+
+    va_TraceMsg(trace_ctx, "\tbuf_id = 0x%08x\n", buf_id);
+    va_TraceMsg(trace_ctx, "\ttimeout_ns = %d\n", timeout_ns);
+    va_TraceMsg(trace_ctx, NULL);
+
+    DPY2TRACE_VIRCTX_EXIT(pva_trace);
+}
+
 void va_TraceMaxNumDisplayAttributes (
     VADisplay dpy,
     int number
diff --git a/va/va_trace.h b/va/va_trace.h
index 6a3d166..5360443 100644
--- a/va/va_trace.h
+++ b/va/va_trace.h
@@ -242,6 +242,12 @@ void va_TraceQuerySurfaceError(
 	void **error_info /*out*/
 );
 
+DLL_HIDDEN
+void va_TraceSyncBuffer(
+    VADisplay dpy,
+    VABufferID buf_id,
+    uint64_t timeout_ns
+);
 
 DLL_HIDDEN
 void va_TraceMaxNumDisplayAttributes (