Move gen6 phantom slice function as common

Following haihao's suggestion, make gen6 phantom slice funcion can be
re-used by SNB+.

v1->v2: Remove an unnessary comment.

Signed-off-by: Zhong Li <zhong.li@intel.com>
Reviewed-by: Xiang Haihao <haihao.xiang@intel.com>
             Gwenole Beauchesne <gwenole.beauchesne@intel.com>
(cherry picked from commit 5e30cc3093407ca2b4dbefa1da8a1262ff8ae7e9)

3 files changed, 84 insertions, 79 deletions

diff --git a/src/gen6_mfd.c b/src/gen6_mfd.c
index 8128a80..b6d19e8 100755
--- a/src/gen6_mfd.c
+++ b/src/gen6_mfd.c
@@ -596,56 +596,6 @@ gen6_mfd_avc_slice_state(VADriverContextP ctx,
     ADVANCE_BCS_BATCH(batch);
 }
 
-static void
-gen6_mfd_avc_phantom_slice_state(VADriverContextP ctx,
-                                 VAPictureParameterBufferH264 *pic_param,
-                                 VASliceParameterBufferH264 *next_slice_param,
-                                 struct gen6_mfd_context *gen6_mfd_context)
-{
-    struct intel_batchbuffer *batch = gen6_mfd_context->base.batch;
-    int width_in_mbs = pic_param->picture_width_in_mbs_minus1 + 1;
-    int height_in_mbs = pic_param->picture_height_in_mbs_minus1 + 1; /* frame height */
-    int slice_hor_pos, slice_ver_pos, slice_start_mb_num, next_slice_hor_pos, next_slice_ver_pos;
-    int mbaff_picture = (!pic_param->pic_fields.bits.field_pic_flag &&
-                         pic_param->seq_fields.bits.mb_adaptive_frame_field_flag);
-
-    if (next_slice_param) {
-        int first_mb_in_next_slice;
-
-        slice_hor_pos = 0;
-        slice_ver_pos = 0;
-        slice_start_mb_num = 0;
-        first_mb_in_next_slice = next_slice_param->first_mb_in_slice << mbaff_picture;
-        next_slice_hor_pos = first_mb_in_next_slice % width_in_mbs;
-        next_slice_ver_pos = first_mb_in_next_slice / width_in_mbs;
-    } else {
-        slice_hor_pos = 0;
-        slice_ver_pos = height_in_mbs;
-        slice_start_mb_num = width_in_mbs * height_in_mbs / (1 + !!pic_param->pic_fields.bits.field_pic_flag);
-        next_slice_hor_pos = 0;
-        next_slice_ver_pos = 0;
-    }
-
-    BEGIN_BCS_BATCH(batch, 11); /* FIXME: is it 10??? */
-    OUT_BCS_BATCH(batch, MFX_AVC_SLICE_STATE | (11 - 2));
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch,
-                  slice_ver_pos << 24 |
-                  slice_hor_pos << 16 |
-                  slice_start_mb_num << 0);
-    OUT_BCS_BATCH(batch,
-                  next_slice_ver_pos << 16 |
-                  next_slice_hor_pos << 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    ADVANCE_BCS_BATCH(batch);
-}
-
 static inline void
 gen6_mfd_avc_ref_idx_state(VADriverContextP ctx,
                            VAPictureParameterBufferH264 *pic_param,
@@ -747,39 +697,12 @@ gen6_mfd_avc_bsd_object(VADriverContextP ctx,
 }
 
 static void
-gen6_mfd_avc_phantom_slice_bsd_object(VADriverContextP ctx,
-                                      VAPictureParameterBufferH264 *pic_param,
-                                      struct gen6_mfd_context *gen6_mfd_context)
-{
-    struct intel_batchbuffer *batch = gen6_mfd_context->base.batch;
-
-    BEGIN_BCS_BATCH(batch, 6);
-    OUT_BCS_BATCH(batch, MFD_AVC_BSD_OBJECT | (6 - 2));
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    OUT_BCS_BATCH(batch, 0);
-    ADVANCE_BCS_BATCH(batch);
-}
-
-static void
-gen6_mfd_avc_phantom_slice(VADriverContextP ctx,
-                           VAPictureParameterBufferH264 *pic_param,
-                           VASliceParameterBufferH264 *next_slice_param,
-                           struct gen6_mfd_context *gen6_mfd_context)
-{
-    gen6_mfd_avc_phantom_slice_state(ctx, pic_param, next_slice_param, gen6_mfd_context);
-    gen6_mfd_avc_phantom_slice_bsd_object(ctx, pic_param, gen6_mfd_context);
-}
-
-static void
 gen6_mfd_avc_phantom_slice_first(VADriverContextP ctx,
                                  VAPictureParameterBufferH264 *pic_param,
                                  VASliceParameterBufferH264 *next_slice_param,
                                  struct gen6_mfd_context *gen6_mfd_context)
 {
-    gen6_mfd_avc_phantom_slice(ctx, pic_param, next_slice_param, gen6_mfd_context);
+    gen6_mfd_avc_phantom_slice(ctx, pic_param, next_slice_param, gen6_mfd_context->base.batch);
 }
 
 static void
@@ -787,7 +710,7 @@ gen6_mfd_avc_phantom_slice_last(VADriverContextP ctx,
                                 VAPictureParameterBufferH264 *pic_param,
                                 struct gen6_mfd_context *gen6_mfd_context)
 {
-    gen6_mfd_avc_phantom_slice(ctx, pic_param, NULL, gen6_mfd_context);
+    gen6_mfd_avc_phantom_slice(ctx, pic_param, NULL, gen6_mfd_context->base.batch);
 }
 
 static void
diff --git a/src/i965_decoder_utils.c b/src/i965_decoder_utils.c
index 7ea39dd..8b546db 100644
--- a/src/i965_decoder_utils.c
+++ b/src/i965_decoder_utils.c
@@ -487,6 +487,81 @@ gen6_send_avc_ref_idx_state(
     );
 }
 
+static void
+gen6_mfd_avc_phantom_slice_state(VADriverContextP ctx,
+                                 VAPictureParameterBufferH264 *pic_param,
+                                 VASliceParameterBufferH264 *next_slice_param,
+                                 struct intel_batchbuffer *batch)
+{
+    int width_in_mbs = pic_param->picture_width_in_mbs_minus1 + 1;
+    int height_in_mbs = pic_param->picture_height_in_mbs_minus1 + 1; /* frame height */
+    int slice_hor_pos, slice_ver_pos, slice_start_mb_num, next_slice_hor_pos, next_slice_ver_pos;
+    int mbaff_picture = (!pic_param->pic_fields.bits.field_pic_flag &&
+                         pic_param->seq_fields.bits.mb_adaptive_frame_field_flag);
+
+    if (next_slice_param) {
+        int first_mb_in_next_slice;
+
+        slice_hor_pos = 0;
+        slice_ver_pos = 0;
+        slice_start_mb_num = 0;
+        first_mb_in_next_slice = next_slice_param->first_mb_in_slice << mbaff_picture;
+        next_slice_hor_pos = first_mb_in_next_slice % width_in_mbs;
+        next_slice_ver_pos = first_mb_in_next_slice / width_in_mbs;
+    } else {
+        slice_hor_pos = 0;
+        slice_ver_pos = height_in_mbs;
+        slice_start_mb_num = width_in_mbs * height_in_mbs / (1 + !!pic_param->pic_fields.bits.field_pic_flag);
+        next_slice_hor_pos = 0;
+        next_slice_ver_pos = 0;
+    }
+
+    BEGIN_BCS_BATCH(batch, 11);
+    OUT_BCS_BATCH(batch, MFX_AVC_SLICE_STATE | (11 - 2));
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch,
+                  slice_ver_pos << 24 |
+                  slice_hor_pos << 16 |
+                  slice_start_mb_num << 0);
+    OUT_BCS_BATCH(batch,
+                  next_slice_ver_pos << 16 |
+                  next_slice_hor_pos << 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    ADVANCE_BCS_BATCH(batch);
+}
+
+static void
+gen6_mfd_avc_phantom_slice_bsd_object(VADriverContextP ctx,
+                                      VAPictureParameterBufferH264 *pic_param,
+                                      struct intel_batchbuffer *batch)
+{
+
+    BEGIN_BCS_BATCH(batch, 6);
+    OUT_BCS_BATCH(batch, MFD_AVC_BSD_OBJECT | (6 - 2));
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    OUT_BCS_BATCH(batch, 0);
+    ADVANCE_BCS_BATCH(batch);
+}
+
+void
+gen6_mfd_avc_phantom_slice(VADriverContextP ctx,
+                           VAPictureParameterBufferH264 *pic_param,
+                           VASliceParameterBufferH264 *next_slice_param,
+                           struct intel_batchbuffer *batch)
+{
+    gen6_mfd_avc_phantom_slice_state(ctx, pic_param, next_slice_param, batch);
+    gen6_mfd_avc_phantom_slice_bsd_object(ctx, pic_param, batch);
+}
+
 /* Comparison function for sorting out the array of free frame store entries */
 static int
 compare_avc_ref_store_func(const void *p1, const void *p2)
diff --git a/src/i965_decoder_utils.h b/src/i965_decoder_utils.h
index 3d39b21..3e6acdd 100644
--- a/src/i965_decoder_utils.h
+++ b/src/i965_decoder_utils.h
@@ -89,6 +89,13 @@ gen6_send_avc_ref_idx_state(
     const GenFrameStore               frame_store[MAX_GEN_REFERENCE_FRAMES]
 );
 
+void
+gen6_mfd_avc_phantom_slice(VADriverContextP ctx,
+                           VAPictureParameterBufferH264 *pic_param,
+                           VASliceParameterBufferH264 *next_slice_param,
+                           struct intel_batchbuffer *batch
+);
+
 VAStatus
 intel_decoder_sanity_check_input(VADriverContextP ctx,
                                  VAProfile profile,