Merge branch 'pipe-video'

1 files changed, 660 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/vl/vl_mc.c b/src/gallium/auxiliary/vl/vl_mc.c
new file mode 100644
index 00000000000..bd05205b52d
--- /dev/null
+++ b/src/gallium/auxiliary/vl/vl_mc.c
@@ -0,0 +1,660 @@
+/**************************************************************************
+ *
+ * Copyright 2009 Younes Manton.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include <assert.h>
+
+#include <pipe/p_context.h>
+
+#include <util/u_sampler.h>
+#include <util/u_draw.h>
+
+#include <tgsi/tgsi_ureg.h>
+
+#include "vl_defines.h"
+#include "vl_vertex_buffers.h"
+#include "vl_mc.h"
+#include "vl_idct.h"
+
+enum VS_OUTPUT
+{
+   VS_O_VPOS,
+   VS_O_VTOP,
+   VS_O_VBOTTOM,
+
+   VS_O_FLAGS = VS_O_VTOP,
+   VS_O_VTEX = VS_O_VBOTTOM
+};
+
+static struct ureg_dst
+calc_position(struct vl_mc *r, struct ureg_program *shader, struct ureg_src block_scale)
+{
+   struct ureg_src vrect, vpos;
+   struct ureg_dst t_vpos;
+   struct ureg_dst o_vpos;
+
+   vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
+   vpos = ureg_DECL_vs_input(shader, VS_I_VPOS);
+
+   t_vpos = ureg_DECL_temporary(shader);
+
+   o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
+
+   /*
+    * block_scale = (MACROBLOCK_WIDTH, MACROBLOCK_HEIGHT) / (dst.width, dst.height)
+    *
+    * t_vpos = (vpos + vrect) * block_scale
+    * o_vpos.xy = t_vpos
+    * o_vpos.zw = vpos
+    */
+   ureg_ADD(shader, ureg_writemask(t_vpos, TGSI_WRITEMASK_XY), vpos, vrect);
+   ureg_MUL(shader, ureg_writemask(t_vpos, TGSI_WRITEMASK_XY), ureg_src(t_vpos), block_scale);
+   ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_XY), ureg_src(t_vpos));
+   ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_ZW), ureg_imm1f(shader, 1.0f));
+
+   return t_vpos;
+}
+
+static struct ureg_dst
+calc_line(struct ureg_program *shader)
+{
+   struct ureg_dst tmp;
+   struct ureg_src pos;
+
+   tmp = ureg_DECL_temporary(shader);
+
+   pos = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS, TGSI_INTERPOLATE_LINEAR);
+
+   /*
+    * tmp.y = fraction(pos.y / 2) >= 0.5 ? 1 : 0
+    */
+   ureg_MUL(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y), pos, ureg_imm1f(shader, 0.5f));
+   ureg_FRC(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y), ureg_src(tmp));
+   ureg_SGE(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y), ureg_src(tmp), ureg_imm1f(shader, 0.5f));
+
+   return tmp;
+}
+
+static void *
+create_ref_vert_shader(struct vl_mc *r)
+{
+   struct ureg_program *shader;
+   struct ureg_src mv_scale;
+   struct ureg_src vrect, vmv[2];
+   struct ureg_dst t_vpos;
+   struct ureg_dst o_vpos, o_vmv[2];
+   unsigned i;
+
+   shader = ureg_create(TGSI_PROCESSOR_VERTEX);
+   if (!shader)
+      return NULL;
+
+   vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
+   vmv[0] = ureg_DECL_vs_input(shader, VS_I_MV_TOP);
+   vmv[1] = ureg_DECL_vs_input(shader, VS_I_MV_BOTTOM);
+
+   t_vpos = calc_position(r, shader, ureg_imm2f(shader,
+      (float)MACROBLOCK_WIDTH / r->buffer_width,
+      (float)MACROBLOCK_HEIGHT / r->buffer_height)
+   );
+
+   o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
+   o_vmv[0] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTOP);
+   o_vmv[1] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VBOTTOM);
+
+   /*
+    * mv_scale.xy = 0.5 / (dst.width, dst.height);
+    * mv_scale.z = 1.0f / 4.0f
+    * mv_scale.w = 1.0f / 255.0f
+    *
+    * // Apply motion vectors
+    * o_vmv[0..1].xy = vmv[0..1] * mv_scale + t_vpos
+    * o_vmv[0..1].zw = vmv[0..1] * mv_scale
+    *
+    */
+
+   mv_scale = ureg_imm4f(shader,
+      0.5f / r->buffer_width,
+      0.5f / r->buffer_height,
+      1.0f / 4.0f,
+      1.0f / PIPE_VIDEO_MV_WEIGHT_MAX);
+
+   for (i = 0; i < 2; ++i) {
+      ureg_MAD(shader, ureg_writemask(o_vmv[i], TGSI_WRITEMASK_XY), mv_scale, vmv[i], ureg_src(t_vpos));
+      ureg_MUL(shader, ureg_writemask(o_vmv[i], TGSI_WRITEMASK_ZW), mv_scale, vmv[i]);
+   }
+
+   ureg_release_temporary(shader, t_vpos);
+
+   ureg_END(shader);
+
+   return ureg_create_shader_and_destroy(shader, r->pipe);
+}
+
+static void *
+create_ref_frag_shader(struct vl_mc *r)
+{
+   const float y_scale =
+      r->buffer_height / 2 *
+      r->macroblock_size / MACROBLOCK_HEIGHT;
+
+   struct ureg_program *shader;
+   struct ureg_src tc[2], sampler;
+   struct ureg_dst ref, field;
+   struct ureg_dst fragment;
+   unsigned label;
+
+   shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
+   if (!shader)
+      return NULL;
+
+   tc[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTOP, TGSI_INTERPOLATE_LINEAR);
+   tc[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VBOTTOM, TGSI_INTERPOLATE_LINEAR);
+
+   sampler = ureg_DECL_sampler(shader, 0);
+   ref = ureg_DECL_temporary(shader);
+
+   fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
+
+   field = calc_line(shader);
+
+   /*
+    * ref = field.z ? tc[1] : tc[0]
+    *
+    * // Adjust tc acording to top/bottom field selection
+    * if (|ref.z|) {
+    *    ref.y *= y_scale
+    *    ref.y = floor(ref.y)
+    *    ref.y += ref.z
+    *    ref.y /= y_scale
+    * }
+    * fragment.xyz = tex(ref, sampler[0])
+    */
+   ureg_CMP(shader, ureg_writemask(ref, TGSI_WRITEMASK_XYZ),
+            ureg_negate(ureg_scalar(ureg_src(field), TGSI_SWIZZLE_Y)),
+            tc[1], tc[0]);
+   ureg_CMP(shader, ureg_writemask(fragment, TGSI_WRITEMASK_W),
+            ureg_negate(ureg_scalar(ureg_src(field), TGSI_SWIZZLE_Y)),
+            tc[1], tc[0]);
+
+   ureg_IF(shader, ureg_scalar(ureg_src(ref), TGSI_SWIZZLE_Z), &label);
+
+      ureg_MUL(shader, ureg_writemask(ref, TGSI_WRITEMASK_Y),
+               ureg_src(ref), ureg_imm1f(shader, y_scale));
+      ureg_FLR(shader, ureg_writemask(ref, TGSI_WRITEMASK_Y), ureg_src(ref));
+      ureg_ADD(shader, ureg_writemask(ref, TGSI_WRITEMASK_Y),
+               ureg_src(ref), ureg_scalar(ureg_src(ref), TGSI_SWIZZLE_Z));
+      ureg_MUL(shader, ureg_writemask(ref, TGSI_WRITEMASK_Y),
+               ureg_src(ref), ureg_imm1f(shader, 1.0f / y_scale));
+
+   ureg_fixup_label(shader, label, ureg_get_instruction_number(shader));
+   ureg_ENDIF(shader);
+
+   ureg_TEX(shader, ureg_writemask(fragment, TGSI_WRITEMASK_XYZ), TGSI_TEXTURE_2D, ureg_src(ref), sampler);
+
+   ureg_release_temporary(shader, ref);
+
+   ureg_release_temporary(shader, field);
+   ureg_END(shader);
+
+   return ureg_create_shader_and_destroy(shader, r->pipe);
+}
+
+static void *
+create_ycbcr_vert_shader(struct vl_mc *r, vl_mc_ycbcr_vert_shader vs_callback, void *callback_priv)
+{
+   struct ureg_program *shader;
+
+   struct ureg_src vrect, vpos;
+   struct ureg_dst t_vpos, t_vtex;
+   struct ureg_dst o_vpos, o_flags;
+
+   struct vertex2f scale = {
+      (float)BLOCK_WIDTH / r->buffer_width * MACROBLOCK_WIDTH / r->macroblock_size,
+      (float)BLOCK_HEIGHT / r->buffer_height * MACROBLOCK_HEIGHT / r->macroblock_size
+   };
+
+   unsigned label;
+
+   shader = ureg_create(TGSI_PROCESSOR_VERTEX);
+   if (!shader)
+      return NULL;
+
+   vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
+   vpos = ureg_DECL_vs_input(shader, VS_I_VPOS);
+
+   t_vpos = calc_position(r, shader, ureg_imm2f(shader, scale.x, scale.y));
+   t_vtex = ureg_DECL_temporary(shader);
+
+   o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
+   o_flags = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_FLAGS);
+
+   /*
+    * o_vtex.xy = t_vpos
+    * o_flags.z = intra * 0.5
+    *
+    * if(interlaced) {
+    *    t_vtex.xy = vrect.y ? { 0, scale.y } : { -scale.y : 0 }
+    *    t_vtex.z = vpos.y % 2
+    *    t_vtex.y = t_vtex.z ? t_vtex.x : t_vtex.y
+    *    o_vpos.y = t_vtex.y + t_vpos.y
+    *
+    *    o_flags.w = t_vtex.z ? 0 : 1
+    * }
+    *
+    */
+
+   vs_callback(callback_priv, r, shader, VS_O_VTEX, t_vpos);
+
+   ureg_MUL(shader, ureg_writemask(o_flags, TGSI_WRITEMASK_Z),
+            ureg_scalar(vpos, TGSI_SWIZZLE_Z), ureg_imm1f(shader, 0.5f));
+   ureg_MOV(shader, ureg_writemask(o_flags, TGSI_WRITEMASK_W), ureg_imm1f(shader, -1.0f));
+
+   if (r->macroblock_size == MACROBLOCK_HEIGHT) { //TODO
+      ureg_IF(shader, ureg_scalar(vpos, TGSI_SWIZZLE_W), &label);
+
+         ureg_CMP(shader, ureg_writemask(t_vtex, TGSI_WRITEMASK_XY),
+                  ureg_negate(ureg_scalar(vrect, TGSI_SWIZZLE_Y)),
+                  ureg_imm2f(shader, 0.0f, scale.y),
+                  ureg_imm2f(shader, -scale.y, 0.0f));
+         ureg_MUL(shader, ureg_writemask(t_vtex, TGSI_WRITEMASK_Z),
+                  ureg_scalar(vpos, TGSI_SWIZZLE_Y), ureg_imm1f(shader, 0.5f));
+
+         ureg_FRC(shader, ureg_writemask(t_vtex, TGSI_WRITEMASK_Z), ureg_src(t_vtex));
+
+         ureg_CMP(shader, ureg_writemask(t_vtex, TGSI_WRITEMASK_Y),
+                  ureg_negate(ureg_scalar(ureg_src(t_vtex), TGSI_SWIZZLE_Z)),
+                  ureg_scalar(ureg_src(t_vtex), TGSI_SWIZZLE_X),
+                  ureg_scalar(ureg_src(t_vtex), TGSI_SWIZZLE_Y));
+         ureg_ADD(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_Y),
+                  ureg_src(t_vpos), ureg_src(t_vtex));
+
+         ureg_CMP(shader, ureg_writemask(o_flags, TGSI_WRITEMASK_W),
+                  ureg_negate(ureg_scalar(ureg_src(t_vtex), TGSI_SWIZZLE_Z)),
+                  ureg_imm1f(shader, 0.0f), ureg_imm1f(shader, 1.0f));
+
+      ureg_fixup_label(shader, label, ureg_get_instruction_number(shader));
+      ureg_ENDIF(shader);
+   }
+
+   ureg_release_temporary(shader, t_vtex);
+   ureg_release_temporary(shader, t_vpos);
+
+   ureg_END(shader);
+
+   return ureg_create_shader_and_destroy(shader, r->pipe);
+}
+
+static void *
+create_ycbcr_frag_shader(struct vl_mc *r, float scale, bool invert,
+                         vl_mc_ycbcr_frag_shader fs_callback, void *callback_priv)
+{
+   struct ureg_program *shader;
+   struct ureg_src flags;
+   struct ureg_dst tmp;
+   struct ureg_dst fragment;
+   unsigned label;
+
+   shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
+   if (!shader)
+      return NULL;
+
+   flags = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_FLAGS, TGSI_INTERPOLATE_LINEAR);
+
+   fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
+
+   tmp = calc_line(shader);
+
+   /*
+    * if (field == tc.w)
+    *    kill();
+    * else {
+    *    fragment.xyz  = tex(tc, sampler) * scale + tc.z
+    *    fragment.w = 1.0f
+    * }
+    */
+
+   ureg_SEQ(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y),
+            ureg_scalar(flags, TGSI_SWIZZLE_W), ureg_src(tmp));
+
+   ureg_IF(shader, ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y), &label);
+
+      ureg_KILP(shader);
+
+   ureg_fixup_label(shader, label, ureg_get_instruction_number(shader));
+   ureg_ELSE(shader, &label);
+
+      fs_callback(callback_priv, r, shader, VS_O_VTEX, tmp);
+
+      if (scale != 1.0f)
+         ureg_MAD(shader, ureg_writemask(tmp, TGSI_WRITEMASK_XYZ),
+                  ureg_src(tmp), ureg_imm1f(shader, scale),
+                  ureg_scalar(flags, TGSI_SWIZZLE_Z));
+      else
+         ureg_ADD(shader, ureg_writemask(tmp, TGSI_WRITEMASK_XYZ),
+                  ureg_src(tmp), ureg_scalar(flags, TGSI_SWIZZLE_Z));
+                  
+      ureg_MUL(shader, ureg_writemask(fragment, TGSI_WRITEMASK_XYZ), ureg_src(tmp), ureg_imm1f(shader, invert ? -1.0f : 1.0f));
+      ureg_MOV(shader, ureg_writemask(fragment, TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
+
+   ureg_fixup_label(shader, label, ureg_get_instruction_number(shader));
+   ureg_ENDIF(shader);
+
+   ureg_release_temporary(shader, tmp);
+
+   ureg_END(shader);
+
+   return ureg_create_shader_and_destroy(shader, r->pipe);
+}
+
+static bool
+init_pipe_state(struct vl_mc *r)
+{
+   struct pipe_sampler_state sampler;
+   struct pipe_blend_state blend;
+   struct pipe_rasterizer_state rs_state;
+   unsigned i;
+
+   assert(r);
+
+   memset(&sampler, 0, sizeof(sampler));
+   sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_BORDER;
+   sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
+   sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
+   sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
+   sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
+   sampler.compare_func = PIPE_FUNC_ALWAYS;
+   sampler.normalized_coords = 1;
+   r->sampler_ref = r->pipe->create_sampler_state(r->pipe, &sampler);
+   if (!r->sampler_ref)
+      goto error_sampler_ref;
+
+   for (i = 0; i < VL_MC_NUM_BLENDERS; ++i) {
+      memset(&blend, 0, sizeof blend);
+      blend.independent_blend_enable = 0;
+      blend.rt[0].blend_enable = 1;
+      blend.rt[0].rgb_func = PIPE_BLEND_ADD;
+      blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_SRC_ALPHA;
+      blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
+      blend.rt[0].alpha_func = PIPE_BLEND_ADD;
+      blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_SRC_ALPHA;
+      blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
+      blend.logicop_enable = 0;
+      blend.logicop_func = PIPE_LOGICOP_CLEAR;
+      blend.rt[0].colormask = i;
+      blend.dither = 0;
+      r->blend_clear[i] = r->pipe->create_blend_state(r->pipe, &blend);
+      if (!r->blend_clear[i])
+         goto error_blend;
+
+      blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
+      blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
+      r->blend_add[i] = r->pipe->create_blend_state(r->pipe, &blend);
+      if (!r->blend_add[i])
+         goto error_blend;
+
+      blend.rt[0].rgb_func = PIPE_BLEND_REVERSE_SUBTRACT;
+      blend.rt[0].alpha_dst_factor = PIPE_BLEND_REVERSE_SUBTRACT;
+      r->blend_sub[i] = r->pipe->create_blend_state(r->pipe, &blend);
+      if (!r->blend_sub[i])
+         goto error_blend;
+   }
+
+   memset(&rs_state, 0, sizeof(rs_state));
+   /*rs_state.sprite_coord_enable */
+   rs_state.sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
+   rs_state.point_quad_rasterization = true;
+   rs_state.point_size = BLOCK_WIDTH;
+   rs_state.gl_rasterization_rules = true;
+   r->rs_state = r->pipe->create_rasterizer_state(r->pipe, &rs_state);
+   if (!r->rs_state)
+      goto error_rs_state;
+
+   return true;
+
+error_rs_state:
+error_blend:
+   for (i = 0; i < VL_MC_NUM_BLENDERS; ++i) {
+      if (r->blend_sub[i])
+         r->pipe->delete_blend_state(r->pipe, r->blend_sub[i]);
+
+      if (r->blend_add[i])
+         r->pipe->delete_blend_state(r->pipe, r->blend_add[i]);
+
+      if (r->blend_clear[i])
+         r->pipe->delete_blend_state(r->pipe, r->blend_clear[i]);
+   }
+
+   r->pipe->delete_sampler_state(r->pipe, r->sampler_ref);
+
+error_sampler_ref:
+   return false;
+}
+
+static void
+cleanup_pipe_state(struct vl_mc *r)
+{
+   unsigned i;
+
+   assert(r);
+
+   r->pipe->delete_sampler_state(r->pipe, r->sampler_ref);
+   for (i = 0; i < VL_MC_NUM_BLENDERS; ++i) {
+      r->pipe->delete_blend_state(r->pipe, r->blend_clear[i]);
+      r->pipe->delete_blend_state(r->pipe, r->blend_add[i]);
+      r->pipe->delete_blend_state(r->pipe, r->blend_sub[i]);
+   }
+   r->pipe->delete_rasterizer_state(r->pipe, r->rs_state);
+}
+
+bool
+vl_mc_init(struct vl_mc *renderer, struct pipe_context *pipe,
+           unsigned buffer_width, unsigned buffer_height,
+           unsigned macroblock_size, float scale,
+           vl_mc_ycbcr_vert_shader vs_callback,
+           vl_mc_ycbcr_frag_shader fs_callback,
+           void *callback_priv)
+{
+   assert(renderer);
+   assert(pipe);
+
+   memset(renderer, 0, sizeof(struct vl_mc));
+
+   renderer->pipe = pipe;
+   renderer->buffer_width = buffer_width;
+   renderer->buffer_height = buffer_height;
+   renderer->macroblock_size = macroblock_size;
+
+   if (!init_pipe_state(renderer))
+      goto error_pipe_state;
+
+   renderer->vs_ref = create_ref_vert_shader(renderer);
+   if (!renderer->vs_ref)
+      goto error_vs_ref;
+
+   renderer->vs_ycbcr = create_ycbcr_vert_shader(renderer, vs_callback, callback_priv);
+   if (!renderer->vs_ycbcr)
+      goto error_vs_ycbcr;
+
+   renderer->fs_ref = create_ref_frag_shader(renderer);
+   if (!renderer->fs_ref)
+      goto error_fs_ref;
+
+   renderer->fs_ycbcr = create_ycbcr_frag_shader(renderer, scale, false, fs_callback, callback_priv);
+   if (!renderer->fs_ycbcr)
+      goto error_fs_ycbcr;
+
+   renderer->fs_ycbcr_sub = create_ycbcr_frag_shader(renderer, scale, true, fs_callback, callback_priv);
+   if (!renderer->fs_ycbcr_sub)
+      goto error_fs_ycbcr_sub;
+
+   return true;
+   
+error_fs_ycbcr_sub:
+   renderer->pipe->delete_fs_state(renderer->pipe, renderer->fs_ycbcr);
+
+error_fs_ycbcr:
+   renderer->pipe->delete_fs_state(renderer->pipe, renderer->fs_ref);
+
+error_fs_ref:
+   renderer->pipe->delete_vs_state(renderer->pipe, renderer->vs_ycbcr);
+
+error_vs_ycbcr:
+   renderer->pipe->delete_vs_state(renderer->pipe, renderer->vs_ref);
+
+error_vs_ref:
+   cleanup_pipe_state(renderer);
+
+error_pipe_state:
+   return false;
+}
+
+void
+vl_mc_cleanup(struct vl_mc *renderer)
+{
+   assert(renderer);
+
+   cleanup_pipe_state(renderer);
+
+   renderer->pipe->delete_vs_state(renderer->pipe, renderer->vs_ref);
+   renderer->pipe->delete_vs_state(renderer->pipe, renderer->vs_ycbcr);
+   renderer->pipe->delete_fs_state(renderer->pipe, renderer->fs_ref);
+   renderer->pipe->delete_fs_state(renderer->pipe, renderer->fs_ycbcr);
+   renderer->pipe->delete_fs_state(renderer->pipe, renderer->fs_ycbcr_sub);
+}
+
+bool
+vl_mc_init_buffer(struct vl_mc *renderer, struct vl_mc_buffer *buffer)
+{
+   assert(renderer && buffer);
+
+   buffer->renderer = renderer;
+
+   buffer->viewport.scale[2] = 1;
+   buffer->viewport.scale[3] = 1;
+   buffer->viewport.translate[0] = 0;
+   buffer->viewport.translate[1] = 0;
+   buffer->viewport.translate[2] = 0;
+   buffer->viewport.translate[3] = 0;
+
+   buffer->fb_state.nr_cbufs = 1;
+   buffer->fb_state.zsbuf = NULL;
+
+   return true;
+}
+
+void
+vl_mc_cleanup_buffer(struct vl_mc_buffer *buffer)
+{
+   assert(buffer);
+}
+
+void
+vl_mc_set_surface(struct vl_mc_buffer *buffer, struct pipe_surface *surface)
+{
+   assert(buffer && surface);
+
+   buffer->surface_cleared = false;
+
+   buffer->viewport.scale[0] = surface->width;
+   buffer->viewport.scale[1] = surface->height;
+
+   buffer->fb_state.width = surface->width;
+   buffer->fb_state.height = surface->height;
+   buffer->fb_state.cbufs[0] = surface;
+}
+
+static void
+prepare_pipe_4_rendering(struct vl_mc_buffer *buffer, unsigned mask)
+{
+   struct vl_mc *renderer;
+
+   assert(buffer);
+
+   renderer = buffer->renderer;
+   renderer->pipe->bind_rasterizer_state(renderer->pipe, renderer->rs_state);
+
+   if (buffer->surface_cleared)
+      renderer->pipe->bind_blend_state(renderer->pipe, renderer->blend_add[mask]);
+   else
+      renderer->pipe->bind_blend_state(renderer->pipe, renderer->blend_clear[mask]);
+
+   renderer->pipe->set_framebuffer_state(renderer->pipe, &buffer->fb_state);
+   renderer->pipe->set_viewport_state(renderer->pipe, &buffer->viewport);
+}
+
+void
+vl_mc_render_ref(struct vl_mc_buffer *buffer, struct pipe_sampler_view *ref)
+{
+   struct vl_mc *renderer;
+
+   assert(buffer && ref);
+
+   prepare_pipe_4_rendering(buffer, PIPE_MASK_R | PIPE_MASK_G | PIPE_MASK_B);
+
+   renderer = buffer->renderer;
+
+   renderer->pipe->bind_vs_state(renderer->pipe, renderer->vs_ref);
+   renderer->pipe->bind_fs_state(renderer->pipe, renderer->fs_ref);
+
+   renderer->pipe->set_fragment_sampler_views(renderer->pipe, 1, &ref);
+   renderer->pipe->bind_fragment_sampler_states(renderer->pipe, 1, &renderer->sampler_ref);
+
+   util_draw_arrays_instanced(renderer->pipe, PIPE_PRIM_QUADS, 0, 4, 0,
+                              renderer->buffer_width / MACROBLOCK_WIDTH *
+                              renderer->buffer_height / MACROBLOCK_HEIGHT);
+
+   buffer->surface_cleared = true;
+}
+
+void
+vl_mc_render_ycbcr(struct vl_mc_buffer *buffer, unsigned component, unsigned num_instances)
+{
+   struct vl_mc *renderer;
+   unsigned mask = 1 << component;
+
+   assert(buffer);
+
+   if (num_instances == 0)
+      return;
+
+   prepare_pipe_4_rendering(buffer, mask);
+
+   renderer = buffer->renderer;
+
+   renderer->pipe->bind_vs_state(renderer->pipe, renderer->vs_ycbcr);
+   renderer->pipe->bind_fs_state(renderer->pipe, renderer->fs_ycbcr);
+
+   util_draw_arrays_instanced(renderer->pipe, PIPE_PRIM_QUADS, 0, 4, 0, num_instances);
+   
+   if (buffer->surface_cleared) {
+      renderer->pipe->bind_blend_state(renderer->pipe, renderer->blend_sub[mask]);
+      renderer->pipe->bind_fs_state(renderer->pipe, renderer->fs_ycbcr_sub);
+      util_draw_arrays_instanced(renderer->pipe, PIPE_PRIM_QUADS, 0, 4, 0, num_instances);
+   }
+}