[g3dvl] rename vl_mpeg12_mc_renderer into vl_mc

It's still not 100% free from mpeg12 specific stuff,
but should now be a good start for other codecs.

1 files changed, 668 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..707a4a27077
--- /dev/null
+++ b/src/gallium/auxiliary/vl/vl_mc.c
@@ -0,0 +1,668 @@
+/**************************************************************************
+ *
+ * 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"
+
+enum VS_OUTPUT
+{
+   VS_O_VPOS,
+   VS_O_LINE,
+   VS_O_VTOP,
+   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
+    */
+   block_scale = ureg_imm2f(shader,
+      (float)MACROBLOCK_WIDTH / r->buffer_width,
+      (float)MACROBLOCK_HEIGHT / r->buffer_height);
+
+   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), vpos);
+
+   return t_vpos;
+}
+
+static void *
+create_ycbcr_vert_shader(struct vl_mc *r)
+{
+   struct ureg_program *shader;
+   struct ureg_src block_scale;
+   struct ureg_src vrect, vpos, eb, flags;
+   struct ureg_dst t_vpos, t_vtex;
+   struct ureg_dst o_line, o_vtex[2];
+   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);
+   eb = ureg_DECL_vs_input(shader, VS_I_EB);
+   flags = ureg_DECL_vs_input(shader, VS_I_FLAGS);
+
+   t_vpos = calc_position(r, shader);
+   t_vtex = ureg_DECL_temporary(shader);
+
+   o_line = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_LINE);
+   o_vtex[0] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTOP);
+   o_vtex[1] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VBOTTOM);
+
+   /*
+    * block_scale = (MACROBLOCK_WIDTH, MACROBLOCK_HEIGHT) / (dst.width, dst.height)
+    *
+    * o_line.x = interlaced
+    * o_line.y = vrect
+    *
+    * o_vtex[0].z = vrect.x ? eb.y : eb.x
+    * o_vtex[1].z = vrect.x ? eb.w : eb.z
+    *
+    * if(interlaced) {
+    *    t_vtex.x = vrect.x
+    *    t_vtex.y = vrect.y * 0.5
+    *    t_vtex += vpos
+    *
+    *    o_vtex[0].xy = t_vtex * block_scale
+    *
+    *    t_vtex.y += 0.5
+    *    o_vtex[1].xy = t_vtex * block_scale
+    * } else {
+    *    o_vtex[0..1].xy = t_vpos
+    * }
+    * o_vtex[2].xy = t_vpos
+    *
+    */
+   block_scale = ureg_imm2f(shader,
+      (float)MACROBLOCK_WIDTH / r->buffer_width,
+      (float)MACROBLOCK_HEIGHT / r->buffer_height);
+
+   ureg_MUL(shader, ureg_writemask(o_line, TGSI_WRITEMASK_X), flags, ureg_imm1f(shader, 0.5f));
+   ureg_MOV(shader, ureg_writemask(o_line, TGSI_WRITEMASK_Y), vrect);
+
+   ureg_MOV(shader, ureg_writemask(o_vtex[0], TGSI_WRITEMASK_XY), ureg_src(t_vpos));
+   ureg_CMP(shader, ureg_writemask(o_vtex[0], TGSI_WRITEMASK_Z),
+            ureg_negate(ureg_scalar(vrect, TGSI_SWIZZLE_X)),
+            ureg_scalar(eb, TGSI_SWIZZLE_Y),
+            ureg_scalar(eb, TGSI_SWIZZLE_X));
+
+   ureg_MOV(shader, ureg_writemask(o_vtex[1], TGSI_WRITEMASK_XY), ureg_src(t_vpos));
+   ureg_CMP(shader, ureg_writemask(o_vtex[1], TGSI_WRITEMASK_Z),
+            ureg_negate(ureg_scalar(vrect, TGSI_SWIZZLE_X)),
+            ureg_scalar(eb, TGSI_SWIZZLE_W),
+            ureg_scalar(eb, TGSI_SWIZZLE_Z));
+
+   if (r->macroblock_size == MACROBLOCK_HEIGHT) { //TODO
+      ureg_IF(shader, ureg_scalar(flags, TGSI_SWIZZLE_Y), &label);
+
+         ureg_MOV(shader, ureg_writemask(t_vtex, TGSI_WRITEMASK_X), vrect);
+         ureg_MUL(shader, ureg_writemask(t_vtex, TGSI_WRITEMASK_Y), vrect, ureg_imm1f(shader, 0.5f));
+         ureg_ADD(shader, ureg_writemask(t_vtex, TGSI_WRITEMASK_XY), vpos, ureg_src(t_vtex));
+         ureg_MUL(shader, ureg_writemask(o_vtex[0], TGSI_WRITEMASK_XY), ureg_src(t_vtex), block_scale);
+         ureg_ADD(shader, ureg_writemask(t_vtex, TGSI_WRITEMASK_Y), ureg_src(t_vtex), ureg_imm1f(shader, 0.5f));
+         ureg_MUL(shader, ureg_writemask(o_vtex[1], TGSI_WRITEMASK_XY), ureg_src(t_vtex), block_scale);
+
+         ureg_MUL(shader, ureg_writemask(o_line, TGSI_WRITEMASK_Y),
+            ureg_scalar(vrect, TGSI_SWIZZLE_Y),
+            ureg_imm1f(shader, MACROBLOCK_HEIGHT / 2));
+
+      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_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_line, o_vmv[2];
+   unsigned i;
+
+   shader = ureg_create(TGSI_PROCESSOR_VERTEX);
+   if (!shader)
+      return NULL;
+
+   vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
+   ureg_DECL_vs_input(shader, VS_I_EB);
+   ureg_DECL_vs_input(shader, VS_I_FLAGS);
+   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);
+
+   o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
+   o_line = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_LINE);
+   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 = 0.5 / (dst.width, dst.height);
+    *
+    * // Apply motion vectors
+    * o_vmv[0..3] = t_vpos + vmv[0..3] * mv_scale
+    *
+    * o_line.y = vrect
+    *
+    */
+
+   ureg_MUL(shader, ureg_writemask(o_line, TGSI_WRITEMASK_Y),
+      vrect, ureg_imm1f(shader, r->macroblock_size / 2));
+
+   mv_scale = ureg_imm4f(shader,
+      0.5f / r->buffer_width,
+      0.5f / r->buffer_height,
+      1.0f / 4.0f,
+      1.0f / 255.0f);
+
+   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 struct ureg_dst
+calc_field(struct ureg_program *shader)
+{
+   struct ureg_dst tmp;
+   struct ureg_src line;
+
+   tmp = ureg_DECL_temporary(shader);
+
+   line = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_LINE, TGSI_INTERPOLATE_LINEAR);
+
+   /*
+    * line.x is flag for intra frames
+    * line.y going from 0 to 1 if not interlaced
+    * line.y going from 0 to 8 in steps of 0.5 if interlaced
+    *
+    * tmp.xy = fraction(line)
+    * tmp.xy = tmp.xy >= 0.5 ? 1 : 0
+    */
+   ureg_MOV(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X), line);
+   ureg_FRC(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y), line);
+   ureg_SGE(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y), ureg_src(tmp), ureg_imm1f(shader, 0.5f));
+
+   return tmp;
+}
+
+static void *
+create_ycbcr_frag_shader(struct vl_mc *r, float scale)
+{
+   struct ureg_program *shader;
+   struct ureg_src tc[2], sampler;
+   struct ureg_dst texel, t_tc, 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);
+
+   t_tc = ureg_DECL_temporary(shader);
+   texel = ureg_DECL_temporary(shader);
+
+   fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
+
+   field = calc_field(shader);
+
+   /*
+    * texel.y  = tex(field.y ? tc[1] : tc[0], sampler[0])
+    * texel.cb = tex(tc[2], sampler[1])
+    * texel.cr = tex(tc[2], sampler[2])
+    */
+
+   ureg_CMP(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_XYZ),
+            ureg_negate(ureg_scalar(ureg_src(field), TGSI_SWIZZLE_Y)),
+            tc[1], tc[0]);
+
+   ureg_SLT(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Z), ureg_src(t_tc), ureg_imm1f(shader, 0.5f));
+
+   ureg_MOV(shader, fragment, ureg_imm4f(shader, 0.0f, 0.0f, 0.0f, 1.0f));
+   ureg_IF(shader, ureg_scalar(ureg_src(t_tc), TGSI_SWIZZLE_Z), &label);
+
+      ureg_TEX(shader, texel, TGSI_TEXTURE_3D, ureg_src(t_tc), sampler);
+
+      if (scale != 1.0f)
+         ureg_MAD(shader, ureg_writemask(fragment, TGSI_WRITEMASK_XYZ),
+                  ureg_src(texel), ureg_imm1f(shader, scale),
+                  ureg_scalar(ureg_src(field), TGSI_SWIZZLE_X));
+      else
+         ureg_ADD(shader, ureg_writemask(fragment, TGSI_WRITEMASK_XYZ),
+                  ureg_src(texel), ureg_scalar(ureg_src(field), TGSI_SWIZZLE_X));
+
+   ureg_fixup_label(shader, label, ureg_get_instruction_number(shader));
+   ureg_ENDIF(shader);
+
+   ureg_release_temporary(shader, t_tc);
+   ureg_release_temporary(shader, texel);
+
+   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_field(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 bool
+init_pipe_state(struct vl_mc *r)
+{
+   struct pipe_sampler_state sampler;
+   struct pipe_blend_state blend;
+   struct pipe_rasterizer_state rs_state;
+
+   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;
+
+   sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
+   sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
+   r->sampler_ycbcr = r->pipe->create_sampler_state(r->pipe, &sampler);
+   if (!r->sampler_ycbcr)
+      goto error_sampler_ycbcr;
+
+   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 = PIPE_MASK_RGBA;
+   blend.dither = 0;
+   r->blend_clear = r->pipe->create_blend_state(r->pipe, &blend);
+   if (!r->blend_clear)
+      goto error_blend_clear;
+
+   blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
+   r->blend_add = r->pipe->create_blend_state(r->pipe, &blend);
+   if (!r->blend_add)
+      goto error_blend_add;
+
+   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:
+   r->pipe->delete_blend_state(r->pipe, r->blend_add);
+
+error_blend_add:
+   r->pipe->delete_blend_state(r->pipe, r->blend_clear);
+
+error_blend_clear:
+   r->pipe->delete_sampler_state(r->pipe, r->sampler_ref);
+
+error_sampler_ref:
+   r->pipe->delete_sampler_state(r->pipe, r->sampler_ycbcr);
+
+error_sampler_ycbcr:
+   return false;
+}
+
+static void
+cleanup_pipe_state(struct vl_mc *r)
+{
+   assert(r);
+
+   r->pipe->delete_sampler_state(r->pipe, r->sampler_ref);
+   r->pipe->delete_sampler_state(r->pipe, r->sampler_ycbcr);
+   r->pipe->delete_blend_state(r->pipe, r->blend_clear);
+   r->pipe->delete_blend_state(r->pipe, r->blend_add);
+   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)
+{
+   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);
+   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);
+   if (!renderer->fs_ycbcr)
+      goto error_fs_ycbcr;
+
+   return true;
+
+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);
+}
+
+bool
+vl_mc_init_buffer(struct vl_mc *renderer, struct vl_mc_buffer *buffer,
+                  struct pipe_sampler_view *source)
+{
+   assert(renderer && buffer);
+   assert(source);
+
+   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;
+
+   pipe_sampler_view_reference(&buffer->source, source);
+
+   return true;
+}
+
+void
+vl_mc_cleanup_buffer(struct vl_mc_buffer *buffer)
+{
+   assert(buffer);
+
+   pipe_sampler_view_reference(&buffer->source, NULL);
+}
+
+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)
+{
+   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);
+   else {
+      renderer->pipe->bind_blend_state(renderer->pipe, renderer->blend_clear);
+      buffer->surface_cleared = true;
+   }
+
+   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,
+                 unsigned not_empty_start_instance, unsigned not_empty_num_instances,
+                 unsigned empty_start_instance, unsigned empty_num_instances)
+{
+   struct vl_mc *renderer;
+
+   assert(buffer && ref);
+
+   if (not_empty_num_instances == 0 && empty_num_instances == 0)
+      return;
+
+   prepare_pipe_4_rendering(buffer);
+
+   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);
+
+   if (not_empty_num_instances > 0)
+      util_draw_arrays_instanced(renderer->pipe, PIPE_PRIM_QUADS, 0, 4,
+                                 not_empty_start_instance, not_empty_num_instances);
+
+   if (empty_num_instances > 0)
+      util_draw_arrays_instanced(renderer->pipe, PIPE_PRIM_QUADS, 0, 4,
+                                 empty_start_instance, empty_num_instances);
+}
+
+void
+vl_mc_render_ycbcr(struct vl_mc_buffer *buffer,
+                   unsigned not_empty_start_instance, unsigned not_empty_num_instances)
+{
+   struct vl_mc *renderer;
+
+   assert(buffer);
+
+   if (not_empty_num_instances == 0)
+      return;
+
+   prepare_pipe_4_rendering(buffer);
+
+   renderer = buffer->renderer;
+
+   renderer->pipe->bind_vs_state(renderer->pipe, renderer->vs_ycbcr);
+   renderer->pipe->bind_fs_state(renderer->pipe, renderer->fs_ycbcr);
+
+   renderer->pipe->set_fragment_sampler_views(renderer->pipe, 1, &buffer->source);
+   renderer->pipe->bind_fragment_sampler_states(renderer->pipe, 1, &renderer->sampler_ycbcr);
+
+   util_draw_arrays_instanced(renderer->pipe, PIPE_PRIM_QUADS, 0, 4,
+                              not_empty_start_instance, not_empty_num_instances);
+}