anv: use common nir_convert_ycbcr

Signed-off-by: Jonathan Marek <[email protected]>
Reviewed-by: Bas Nieuwenhuizen <[email protected]>
Acked-by: Jason Ekstrand <[email protected]>
Reviewed-by: D Scott Phillips <[email protected]>
Reviewed-by: Lionel Landwerlin <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4528>

1 files changed, 8 insertions, 123 deletions

diff --git a/src/intel/vulkan/anv_nir_lower_ycbcr_textures.c b/src/intel/vulkan/anv_nir_lower_ycbcr_textures.c
index c31c229ff40..e55e5317fc7 100644
--- a/src/intel/vulkan/anv_nir_lower_ycbcr_textures.c
+++ b/src/intel/vulkan/anv_nir_lower_ycbcr_textures.c
@@ -25,6 +25,7 @@
 #include "anv_private.h"
 #include "nir/nir.h"
 #include "nir/nir_builder.h"
+#include "nir/nir_vulkan.h"
 
 struct ycbcr_state {
    nir_builder *builder;
@@ -34,127 +35,6 @@ struct ycbcr_state {
    struct anv_ycbcr_conversion *conversion;
 };
 
-static nir_ssa_def *
-y_range(nir_builder *b,
-        nir_ssa_def *y_channel,
-        int bpc,
-        VkSamplerYcbcrRange range)
-{
-   switch (range) {
-   case VK_SAMPLER_YCBCR_RANGE_ITU_FULL:
-      return y_channel;
-   case VK_SAMPLER_YCBCR_RANGE_ITU_NARROW:
-      return nir_fmul(b,
-                      nir_fadd(b,
-                               nir_fmul(b, y_channel,
-                                        nir_imm_float(b, pow(2, bpc) - 1)),
-                               nir_imm_float(b, -16.0f * pow(2, bpc - 8))),
-                      nir_frcp(b, nir_imm_float(b, 219.0f * pow(2, bpc - 8))));
-   default:
-      unreachable("missing Ycbcr range");
-      return NULL;
-   }
-}
-
-static nir_ssa_def *
-chroma_range(nir_builder *b,
-             nir_ssa_def *chroma_channel,
-             int bpc,
-             VkSamplerYcbcrRange range)
-{
-   switch (range) {
-   case VK_SAMPLER_YCBCR_RANGE_ITU_FULL:
-      return nir_fadd(b, chroma_channel,
-                      nir_imm_float(b, -pow(2, bpc - 1) / (pow(2, bpc) - 1.0f)));
-   case VK_SAMPLER_YCBCR_RANGE_ITU_NARROW:
-      return nir_fmul(b,
-                      nir_fadd(b,
-                               nir_fmul(b, chroma_channel,
-                                        nir_imm_float(b, pow(2, bpc) - 1)),
-                               nir_imm_float(b, -128.0f * pow(2, bpc - 8))),
-                      nir_frcp(b, nir_imm_float(b, 224.0f * pow(2, bpc - 8))));
-   default:
-      unreachable("missing Ycbcr range");
-      return NULL;
-   }
-}
-
-typedef struct nir_const_value_3_4 {
-   nir_const_value v[3][4];
-} nir_const_value_3_4;
-
-static const nir_const_value_3_4 *
-ycbcr_model_to_rgb_matrix(VkSamplerYcbcrModelConversion model)
-{
-   switch (model) {
-   case VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_601: {
-      static const nir_const_value_3_4 bt601 = { {
-         { { .f32 =  1.402f             }, { .f32 = 1.0f }, { .f32 =  0.0f               }, { .f32 = 0.0f } },
-         { { .f32 = -0.714136286201022f }, { .f32 = 1.0f }, { .f32 = -0.344136286201022f }, { .f32 = 0.0f } },
-         { { .f32 =  0.0f               }, { .f32 = 1.0f }, { .f32 =  1.772f             }, { .f32 = 0.0f } },
-      } };
-
-      return &bt601;
-   }
-   case VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_709: {
-      static const nir_const_value_3_4 bt709 = { {
-         { { .f32 =  1.5748031496063f   }, { .f32 = 1.0f }, { .f32 =  0.0f               }, { .f32 = 0.0f } },
-         { { .f32 = -0.468125209181067f }, { .f32 = 1.0f }, { .f32 = -0.187327487470334f }, { .f32 = 0.0f } },
-         { { .f32 =  0.0f               }, { .f32 = 1.0f }, { .f32 =  1.85563184264242f  }, { .f32 = 0.0f } },
-      } };
-
-      return &bt709;
-   }
-   case VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_2020: {
-      static const nir_const_value_3_4 bt2020 = { {
-         { { .f32 =  1.4746f            }, { .f32 = 1.0f }, { .f32 =  0.0f               }, { .f32 = 0.0f } },
-         { { .f32 = -0.571353126843658f }, { .f32 = 1.0f }, { .f32 = -0.164553126843658f }, { .f32 = 0.0f } },
-         { { .f32 =  0.0f               }, { .f32 = 1.0f }, { .f32 =  1.8814f            }, { .f32 = 0.0f } },
-      } };
-
-      return &bt2020;
-   }
-   default:
-      unreachable("missing Ycbcr model");
-      return NULL;
-   }
-}
-
-static nir_ssa_def *
-convert_ycbcr(struct ycbcr_state *state,
-              nir_ssa_def *raw_channels,
-              uint32_t *bpcs)
-{
-   nir_builder *b = state->builder;
-   struct anv_ycbcr_conversion *conversion = state->conversion;
-
-   nir_ssa_def *expanded_channels =
-      nir_vec4(b,
-               chroma_range(b, nir_channel(b, raw_channels, 0),
-                            bpcs[0], conversion->ycbcr_range),
-               y_range(b, nir_channel(b, raw_channels, 1),
-                       bpcs[1], conversion->ycbcr_range),
-               chroma_range(b, nir_channel(b, raw_channels, 2),
-                            bpcs[2], conversion->ycbcr_range),
-               nir_imm_float(b, 1.0f));
-
-   if (conversion->ycbcr_model == VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_IDENTITY)
-      return expanded_channels;
-
-   const nir_const_value_3_4 *conversion_matrix =
-      ycbcr_model_to_rgb_matrix(conversion->ycbcr_model);
-
-   nir_ssa_def *converted_channels[] = {
-      nir_fdot4(b, expanded_channels, nir_build_imm(b, 4, 32, conversion_matrix->v[0])),
-      nir_fdot4(b, expanded_channels, nir_build_imm(b, 4, 32, conversion_matrix->v[1])),
-      nir_fdot4(b, expanded_channels, nir_build_imm(b, 4, 32, conversion_matrix->v[2]))
-   };
-
-   return nir_vec4(b,
-                   converted_channels[0], converted_channels[1],
-                   converted_channels[2], nir_imm_float(b, 1.0f));
-}
-
 /* TODO: we should probably replace this with a push constant/uniform. */
 static nir_ssa_def *
 get_texture_size(struct ycbcr_state *state, nir_deref_instr *texture)
@@ -436,8 +316,13 @@ try_lower_tex_ycbcr(const struct anv_pipeline_layout *layout,
    }
 
    nir_ssa_def *result = nir_vec(builder, swizzled_comp, 4);
-   if (state.conversion->ycbcr_model != VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY)
-      result = convert_ycbcr(&state, result, swizzled_bpcs);
+   if (state.conversion->ycbcr_model != VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY) {
+      result = nir_convert_ycbcr_to_rgb(builder,
+                                        state.conversion->ycbcr_model,
+                                        state.conversion->ycbcr_range,
+                                        result,
+                                        swizzled_bpcs);
+   }
 
    nir_ssa_def_rewrite_uses(&tex->dest.ssa, nir_src_for_ssa(result));
    nir_instr_remove(&tex->instr);