ffmpeg-v4l2-request-fourier: revert ctx flip — PR #36 was a measurement artifact (0015)

Reverts the no_qpu → qpu-capable ctx flip that landed via patch 0014
(marfrit-packages PR #104).

PR #104 was justified by daedalus-fourier PR #36's "QPU 4.30x faster
than CPU NEON" bench result.  That number was a measurement artifact:
v3d_runner.read_spv() did a bare cwd-relative fopen() with no path
search, so when the bench was run from the source dir (as in PR #36),
the SPVs at $builddir/v3d_*.spv were not found, every QPU dispatch
returned -1 fast, and the bench loop timed the failure path.

daedalus-fourier PR #37 fixes the SPV search + bench preflight.
Corrected numbers on hertz (Pi 5 V3D 7.1):

  kernel             CPU ns/op  QPU ns/op  winner
  IDCT 4x4 luma          10.75     217.63  CPU 20.24x
  IDCT 8x8 luma          29.69     785.94  CPU 26.47x
  Deblock luma_v         17.63     467.42  CPU 26.51x
  Deblock luma_h         38.30     498.53  CPU 13.02x
  qpel mc20 (8x8)        30.17    1300.44  CPU 43.10x
  qpel mc02 (8x8)        17.69    1363.40  CPU 77.08x
  qpel mc22 (8x8)        71.60    1948.37  CPU 27.21x

  1080p sum: CPU 5.57 ms vs QPU 123.54 ms — QPU 22x SLOWER.

Until daedalus QPU dispatch overhead is actually competitive (separate
multi-task effort tracked on the daedalus-fourier side), libavcodec.so
substitution must stay on daedalus_ctx_create_no_qpu() so the host
processes (firefox-fourier RDD, mpv-fourier, daedalus_v4l2_daemon)
don't pessimize their H.264 decode path.

Adds 0015-h264-ctx-revert-to-no-qpu.patch (2-line revert of patch 0014)
to both arch PKGBUILD and debian build-deb.sh.  Both pkgrel bumped
11 → 12.  Refs reauktion/daedalus-fourier!37.

arch/ffmpeg-v4l2-request-fourier/0011-h264-chroma-dc-hadamard-daedalus-fourier.patch

@@ -0,0 +1,101 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: claude-noether <claude-noether@noreply.localhost>
+Date: Sun, 25 May 2026 13:00:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264dsp: route H.264 chroma DC Hadamard through daedalus-fourier
+
+Substitutes H264DSPContext.chroma_dc_dequant_idct in the
+4:2:0 / bit_depth=8 init path with a wrapper that composes
+the daedalus chroma DC Hadamard primitive (fourier PR #25)
+with qmul scaling FFmpeg does in one fused function.
+
+Bit-exact against ff_h264_chroma_dc_dequant_idct_8_c.
+Hadamard correctness gated by fourier PR #23 test suite.
+
+4:2:2 chroma stays on the in-tree 422 variant (same
+gating shape as 0009 chroma deblock substitution).
+
+Requires daedalus-fourier commit b9f9ff2 or later (PR #25
+exposing the public Hadamard symbol).  Pin bumps in PKGBUILD
+and build-deb.sh come in the same commit.
+---
+diff --git a/libavcodec/aarch64/h264_idct_daedalus.c b/libavcodec/aarch64/h264_idct_daedalus.c
+--- a/libavcodec/aarch64/h264_idct_daedalus.c	2026-05-25 13:38:32.019491484 +0200
++++ libavcodec/aarch64/h264_idct_daedalus.c	2026-05-25 13:38:32.033821507 +0200
+@@ -1,5 +1,5 @@
+ /*
+- * H.264 4x4 / 8x8 IDCT + luma v/h (inter + intra) + chroma v/h deblock — daedalus-fourier substitution shims.
++ * H.264 4x4 / 8x8 IDCT + luma v/h (inter+intra) + chroma v/h deblock + chroma DC Hadamard — daedalus-fourier substitution shims.
+  *
+  * Routes H264DSPContext.idct_add           → daedalus_recipe_dispatch_h264_idct4
+  *        H264DSPContext.idct8_add          → daedalus_recipe_dispatch_h264_idct8
+@@ -9,6 +9,7 @@
+  *        H264DSPContext.h_loop_filter_chroma → daedalus_recipe_dispatch_h264_deblock_chroma_h
+  *        H264DSPContext.v_loop_filter_luma_intra → daedalus_recipe_dispatch_h264_deblock_luma_v_intra
+  *        H264DSPContext.h_loop_filter_luma_intra → daedalus_recipe_dispatch_h264_deblock_luma_h_intra
++ *        H264DSPContext.chroma_dc_dequant_idct   → daedalus_h264_chroma_dc_hadamard_2x2 + caller-side qmul
+  * instead of the in-tree ff_h264_*_neon assembly.  The recipe layer
+  * picks the substrate (CPU NEON for cycles 6 + 7 by default; cycle 8
+  * is CPU primary with QPU opportunistic — the ctx below is no-QPU,
+@@ -60,6 +61,7 @@
+                                                 int alpha, int beta);
+ void ff_h264_h_loop_filter_luma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
+                                                 int alpha, int beta);
++void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul);
+ 
+ void ff_h264_idct_add_daedalus(uint8_t *dst, int16_t *block, int stride)
+ {
+@@ -187,3 +189,32 @@
+     daedalus_recipe_dispatch_h264_deblock_luma_h_intra(g_dctx, pix, (size_t)stride,
+                                                         1, &meta);
+ }
++
++/* Composes daedalus_h264_chroma_dc_hadamard_2x2 with the qmul scaling
++ * that FFmpeg's reference does in one fused function (h264idct_template.c
++ * ff_h264_chroma_dc_dequant_idct).
++ *
++ * The 4 DC coefficients are scattered across the per-MB coefficient
++ * buffer at offsets [r*stride + c*xStride] (stride=32, xStride=16).
++ * Extract into a contiguous int16[4], run the Hadamard, then apply
++ * the qmul scale and write back to the original positions.
++ *
++ * No daedalus ctx needed; the Hadamard is a pure stateless primitive.
++ */
++void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul)
++{
++    enum { stride = 32, xStride = 16 };
++    int16_t dc[4];
++
++    dc[0] = block[stride*0 + xStride*0];
++    dc[1] = block[stride*0 + xStride*1];
++    dc[2] = block[stride*1 + xStride*0];
++    dc[3] = block[stride*1 + xStride*1];
++
++    daedalus_h264_chroma_dc_hadamard_2x2(dc);
++
++    block[stride*0 + xStride*0] = (int16_t)((int)dc[0] * qmul >> 7);
++    block[stride*0 + xStride*1] = (int16_t)((int)dc[1] * qmul >> 7);
++    block[stride*1 + xStride*0] = (int16_t)((int)dc[2] * qmul >> 7);
++    block[stride*1 + xStride*1] = (int16_t)((int)dc[3] * qmul >> 7);
++}
+diff --git a/libavcodec/aarch64/h264dsp_init_aarch64.c b/libavcodec/aarch64/h264dsp_init_aarch64.c
+--- a/libavcodec/aarch64/h264dsp_init_aarch64.c	2026-05-25 13:38:32.020346459 +0200
++++ libavcodec/aarch64/h264dsp_init_aarch64.c	2026-05-25 13:38:32.033909804 +0200
+@@ -41,6 +41,7 @@
+                                            int beta);
+ void ff_h264_h_loop_filter_luma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
+                                                 int alpha, int beta);
++void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul);
+ void ff_h264_v_loop_filter_chroma_neon(uint8_t *pix, ptrdiff_t stride, int alpha,
+                                        int beta, int8_t *tc0);
+ void ff_h264_v_loop_filter_chroma_daedalus(uint8_t *pix, ptrdiff_t stride,
+@@ -135,6 +136,7 @@
+         c->v_loop_filter_chroma_intra = ff_h264_v_loop_filter_chroma_intra_neon;
+ 
+         if (chroma_format_idc <= 1) {
++            c->chroma_dc_dequant_idct = ff_h264_chroma_dc_dequant_idct_daedalus;
+             c->h_loop_filter_chroma = ff_h264_h_loop_filter_chroma_daedalus;
+             c->h_loop_filter_chroma_intra = ff_h264_h_loop_filter_chroma_intra_neon;
+             c->h_loop_filter_chroma_mbaff_intra = ff_h264_h_loop_filter_chroma_mbaff_intra_neon;
+--
+2.47.3
+

arch/ffmpeg-v4l2-request-fourier/0012-h264-qpel-rest-daedalus-fourier.patch

@@ -0,0 +1,245 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: claude-noether <claude-noether@noreply.localhost>
+Date: Sun, 25 May 2026 14:00:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264qpel: route remaining qpel 8x8 positions through daedalus-fourier
+
+Closes the H.264 qpel substitution.  Extends 0007 (which routed only
+mc20 put_) to ALL 15 useful positions in BOTH the put_ and avg_
+tables, skipping mc00 (integer copy / pointer-only fast path).
+
+29 substitutions total: 14 new put_ + 15 avg_.  Each is a uniform
+wrapper around daedalus_recipe_dispatch_h264_qpel_{avg_,}mcXY exposed
+by daedalus-fourier PRs #15-#20.
+
+All recipe-table entries route AUTO to CPU NEON (no QPU shaders
+for any qpel position other than mc20 yet), so this is plumbing-only
+NEON-to-NEON — bit-exact against the in-tree ff_*_h264_qpel8_*_neon
+path.
+
+16x16 qpel tables ([0][...]) stay on the in-tree NEON.  daedalus
+only exposes 8x8 today; 16x16 substitution can land once fourier
+provides those variants (likely just dispatching the 8x8 path four
+times with shifted dst/src offsets).
+
+Refs reauktion/daedalus-v4l2#11 — substitution arc qpel buildout.
+---
+diff --git a/libavcodec/aarch64/h264_qpel_daedalus.c b/libavcodec/aarch64/h264_qpel_daedalus.c
+--- a/libavcodec/aarch64/h264_qpel_daedalus.c	2026-05-25 14:05:05.789298250 +0200
++++ libavcodec/aarch64/h264_qpel_daedalus.c	2026-05-25 14:05:05.818358374 +0200
+@@ -1,10 +1,13 @@
+ /*
+- * H.264 luma qpel mc20 (8x8, horizontal half-pel, 6-tap "put")
+- * — daedalus-fourier substitution shim.
++ * H.264 luma qpel 8x8 — daedalus-fourier substitution shims (put_ + avg_).
+  *
+- * Routes H264QpelContext.put_h264_qpel_pixels_tab[1][2] through
+- * daedalus_recipe_dispatch_h264_qpel_mc20 instead of
+- * ff_put_h264_qpel8_mc20_neon.  The recipe layer picks the substrate
++ * Routes ALL 15 useful positions in H264QpelContext's 8x8 put_ and
++ * avg_ tables through daedalus_recipe_dispatch_h264_qpel_mc{XY}
++ * (skipping mc00 which is integer copy / FFmpeg's pointer-only fast
++ * path).  Plumbing-only NEON-by-recipe — daedalus-fourier PRs #15-#20
++ * exposed each variant via the same dispatch signature, so the
++ * substitution is a uniform macro across put_/avg_ and across all
++ * 15 mc positions.  The recipe layer picks the substrate
+  * (CPU NEON for cycle 9; QPU not viable — per-block 7.6 ns vs
+  * ~250 ns QPU dispatch floor, see docs/k9_h264qpel_mc20.md).
+  *
+@@ -48,3 +51,53 @@
+     daedalus_recipe_dispatch_h264_qpel_mc20(g_dctx, dst, src, (size_t)stride,
+                                             1, &meta);
+ }
++
++
++/* All other 8x8 qpel positions follow the same dispatch shape as mc20
++ * above.  The macro collapses ~600 LOC of one-wrapper-per-variant
++ * boilerplate (29 variants total: 14 put_ + 15 avg_). */
++#define DEFINE_QPEL_WRAPPER(type, suffix, dispatch_fn)                          \
++void ff_ ## type ## _h264_qpel8_ ## suffix ## _daedalus(uint8_t *dst,           \
++    const uint8_t *src, ptrdiff_t stride);                                      \
++void ff_ ## type ## _h264_qpel8_ ## suffix ## _daedalus(uint8_t *dst,           \
++    const uint8_t *src, ptrdiff_t stride)                                       \
++{                                                                               \
++    static const daedalus_h264_qpel_meta meta = { .dst_off = 0, .src_off = 0 }; \
++    pthread_once(&g_dctx_once, daedalus_ctx_init_once);                         \
++    dispatch_fn(g_dctx, dst, src, (size_t)stride, 1, &meta);                    \
++}
++
++/* put_ variants (mc20 stays on the explicit definition above). */
++DEFINE_QPEL_WRAPPER(put, mc10, daedalus_recipe_dispatch_h264_qpel_mc10)
++DEFINE_QPEL_WRAPPER(put, mc30, daedalus_recipe_dispatch_h264_qpel_mc30)
++DEFINE_QPEL_WRAPPER(put, mc01, daedalus_recipe_dispatch_h264_qpel_mc01)
++DEFINE_QPEL_WRAPPER(put, mc11, daedalus_recipe_dispatch_h264_qpel_mc11)
++DEFINE_QPEL_WRAPPER(put, mc21, daedalus_recipe_dispatch_h264_qpel_mc21)
++DEFINE_QPEL_WRAPPER(put, mc31, daedalus_recipe_dispatch_h264_qpel_mc31)
++DEFINE_QPEL_WRAPPER(put, mc02, daedalus_recipe_dispatch_h264_qpel_mc02)
++DEFINE_QPEL_WRAPPER(put, mc12, daedalus_recipe_dispatch_h264_qpel_mc12)
++DEFINE_QPEL_WRAPPER(put, mc22, daedalus_recipe_dispatch_h264_qpel_mc22)
++DEFINE_QPEL_WRAPPER(put, mc32, daedalus_recipe_dispatch_h264_qpel_mc32)
++DEFINE_QPEL_WRAPPER(put, mc03, daedalus_recipe_dispatch_h264_qpel_mc03)
++DEFINE_QPEL_WRAPPER(put, mc13, daedalus_recipe_dispatch_h264_qpel_mc13)
++DEFINE_QPEL_WRAPPER(put, mc23, daedalus_recipe_dispatch_h264_qpel_mc23)
++DEFINE_QPEL_WRAPPER(put, mc33, daedalus_recipe_dispatch_h264_qpel_mc33)
++
++/* avg_ variants — all 15 useful positions. */
++DEFINE_QPEL_WRAPPER(avg, mc10, daedalus_recipe_dispatch_h264_qpel_avg_mc10)
++DEFINE_QPEL_WRAPPER(avg, mc20, daedalus_recipe_dispatch_h264_qpel_avg_mc20)
++DEFINE_QPEL_WRAPPER(avg, mc30, daedalus_recipe_dispatch_h264_qpel_avg_mc30)
++DEFINE_QPEL_WRAPPER(avg, mc01, daedalus_recipe_dispatch_h264_qpel_avg_mc01)
++DEFINE_QPEL_WRAPPER(avg, mc11, daedalus_recipe_dispatch_h264_qpel_avg_mc11)
++DEFINE_QPEL_WRAPPER(avg, mc21, daedalus_recipe_dispatch_h264_qpel_avg_mc21)
++DEFINE_QPEL_WRAPPER(avg, mc31, daedalus_recipe_dispatch_h264_qpel_avg_mc31)
++DEFINE_QPEL_WRAPPER(avg, mc02, daedalus_recipe_dispatch_h264_qpel_avg_mc02)
++DEFINE_QPEL_WRAPPER(avg, mc12, daedalus_recipe_dispatch_h264_qpel_avg_mc12)
++DEFINE_QPEL_WRAPPER(avg, mc22, daedalus_recipe_dispatch_h264_qpel_avg_mc22)
++DEFINE_QPEL_WRAPPER(avg, mc32, daedalus_recipe_dispatch_h264_qpel_avg_mc32)
++DEFINE_QPEL_WRAPPER(avg, mc03, daedalus_recipe_dispatch_h264_qpel_avg_mc03)
++DEFINE_QPEL_WRAPPER(avg, mc13, daedalus_recipe_dispatch_h264_qpel_avg_mc13)
++DEFINE_QPEL_WRAPPER(avg, mc23, daedalus_recipe_dispatch_h264_qpel_avg_mc23)
++DEFINE_QPEL_WRAPPER(avg, mc33, daedalus_recipe_dispatch_h264_qpel_avg_mc33)
++
++#undef DEFINE_QPEL_WRAPPER
+diff --git a/libavcodec/aarch64/h264qpel_init_aarch64.c b/libavcodec/aarch64/h264qpel_init_aarch64.c
+--- a/libavcodec/aarch64/h264qpel_init_aarch64.c	2026-05-25 14:05:05.790403989 +0200
++++ libavcodec/aarch64/h264qpel_init_aarch64.c	2026-05-25 14:05:05.819136071 +0200
+@@ -50,6 +50,64 @@
+ void ff_put_h264_qpel8_mc30_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);
+ void ff_put_h264_qpel8_mc20_daedalus(uint8_t *dst, const uint8_t *src,
+                                      ptrdiff_t stride);
++void ff_put_h264_qpel8_mc10_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc30_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc01_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc11_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc21_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc31_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc02_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc12_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc22_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc32_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc03_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc13_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc23_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc33_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc10_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc20_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc30_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc01_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc11_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc21_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc31_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc02_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc12_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc22_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc32_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc03_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc13_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc23_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc33_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
+ void ff_put_h264_qpel8_mc01_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);
+ void ff_put_h264_qpel8_mc11_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);
+ void ff_put_h264_qpel8_mc21_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);
+@@ -164,21 +222,21 @@
+         c->put_h264_qpel_pixels_tab[0][15] = ff_put_h264_qpel16_mc33_neon;
+ 
+         c->put_h264_qpel_pixels_tab[1][ 0] = ff_put_h264_qpel8_mc00_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 1] = ff_put_h264_qpel8_mc10_neon;
++        c->put_h264_qpel_pixels_tab[1][ 1] = ff_put_h264_qpel8_mc10_daedalus;
+         c->put_h264_qpel_pixels_tab[1][ 2] = ff_put_h264_qpel8_mc20_daedalus;
+-        c->put_h264_qpel_pixels_tab[1][ 3] = ff_put_h264_qpel8_mc30_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 4] = ff_put_h264_qpel8_mc01_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 5] = ff_put_h264_qpel8_mc11_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 6] = ff_put_h264_qpel8_mc21_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 7] = ff_put_h264_qpel8_mc31_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 8] = ff_put_h264_qpel8_mc02_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 9] = ff_put_h264_qpel8_mc12_neon;
+-        c->put_h264_qpel_pixels_tab[1][10] = ff_put_h264_qpel8_mc22_neon;
+-        c->put_h264_qpel_pixels_tab[1][11] = ff_put_h264_qpel8_mc32_neon;
+-        c->put_h264_qpel_pixels_tab[1][12] = ff_put_h264_qpel8_mc03_neon;
+-        c->put_h264_qpel_pixels_tab[1][13] = ff_put_h264_qpel8_mc13_neon;
+-        c->put_h264_qpel_pixels_tab[1][14] = ff_put_h264_qpel8_mc23_neon;
+-        c->put_h264_qpel_pixels_tab[1][15] = ff_put_h264_qpel8_mc33_neon;
++        c->put_h264_qpel_pixels_tab[1][ 3] = ff_put_h264_qpel8_mc30_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 4] = ff_put_h264_qpel8_mc01_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 5] = ff_put_h264_qpel8_mc11_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 6] = ff_put_h264_qpel8_mc21_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 7] = ff_put_h264_qpel8_mc31_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 8] = ff_put_h264_qpel8_mc02_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 9] = ff_put_h264_qpel8_mc12_daedalus;
++        c->put_h264_qpel_pixels_tab[1][10] = ff_put_h264_qpel8_mc22_daedalus;
++        c->put_h264_qpel_pixels_tab[1][11] = ff_put_h264_qpel8_mc32_daedalus;
++        c->put_h264_qpel_pixels_tab[1][12] = ff_put_h264_qpel8_mc03_daedalus;
++        c->put_h264_qpel_pixels_tab[1][13] = ff_put_h264_qpel8_mc13_daedalus;
++        c->put_h264_qpel_pixels_tab[1][14] = ff_put_h264_qpel8_mc23_daedalus;
++        c->put_h264_qpel_pixels_tab[1][15] = ff_put_h264_qpel8_mc33_daedalus;
+ 
+         c->avg_h264_qpel_pixels_tab[0][ 0] = ff_avg_h264_qpel16_mc00_neon;
+         c->avg_h264_qpel_pixels_tab[0][ 1] = ff_avg_h264_qpel16_mc10_neon;
+@@ -198,21 +256,21 @@
+         c->avg_h264_qpel_pixels_tab[0][15] = ff_avg_h264_qpel16_mc33_neon;
+ 
+         c->avg_h264_qpel_pixels_tab[1][ 0] = ff_avg_h264_qpel8_mc00_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 1] = ff_avg_h264_qpel8_mc10_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 2] = ff_avg_h264_qpel8_mc20_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 3] = ff_avg_h264_qpel8_mc30_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 4] = ff_avg_h264_qpel8_mc01_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 5] = ff_avg_h264_qpel8_mc11_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 6] = ff_avg_h264_qpel8_mc21_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 7] = ff_avg_h264_qpel8_mc31_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 8] = ff_avg_h264_qpel8_mc02_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 9] = ff_avg_h264_qpel8_mc12_neon;
+-        c->avg_h264_qpel_pixels_tab[1][10] = ff_avg_h264_qpel8_mc22_neon;
+-        c->avg_h264_qpel_pixels_tab[1][11] = ff_avg_h264_qpel8_mc32_neon;
+-        c->avg_h264_qpel_pixels_tab[1][12] = ff_avg_h264_qpel8_mc03_neon;
+-        c->avg_h264_qpel_pixels_tab[1][13] = ff_avg_h264_qpel8_mc13_neon;
+-        c->avg_h264_qpel_pixels_tab[1][14] = ff_avg_h264_qpel8_mc23_neon;
+-        c->avg_h264_qpel_pixels_tab[1][15] = ff_avg_h264_qpel8_mc33_neon;
++        c->avg_h264_qpel_pixels_tab[1][ 1] = ff_avg_h264_qpel8_mc10_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 2] = ff_avg_h264_qpel8_mc20_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 3] = ff_avg_h264_qpel8_mc30_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 4] = ff_avg_h264_qpel8_mc01_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 5] = ff_avg_h264_qpel8_mc11_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 6] = ff_avg_h264_qpel8_mc21_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 7] = ff_avg_h264_qpel8_mc31_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 8] = ff_avg_h264_qpel8_mc02_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 9] = ff_avg_h264_qpel8_mc12_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][10] = ff_avg_h264_qpel8_mc22_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][11] = ff_avg_h264_qpel8_mc32_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][12] = ff_avg_h264_qpel8_mc03_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][13] = ff_avg_h264_qpel8_mc13_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][14] = ff_avg_h264_qpel8_mc23_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][15] = ff_avg_h264_qpel8_mc33_daedalus;
+     } else if (have_neon(cpu_flags) && bit_depth == 10) {
+         c->put_h264_qpel_pixels_tab[0][ 1] = ff_put_h264_qpel16_mc10_neon_10;
+         c->put_h264_qpel_pixels_tab[0][ 2] = ff_put_h264_qpel16_mc20_neon_10;
+--
+2.47.3
+

arch/ffmpeg-v4l2-request-fourier/0013-h264-deblock-chroma-intra-daedalus-fourier.patch

@@ -0,0 +1,120 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: claude-noether <claude-noether@noreply.localhost>
+Date: Sun, 25 May 2026 14:30:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264dsp: route H.264 chroma intra deblock (4:2:0) through daedalus-fourier
+
+Substitutes c->v_loop_filter_chroma_intra and c->h_loop_filter_chroma_intra
+with daedalus wrappers in the bit_depth=8 / chroma_format_idc<=1 (4:2:0)
+branch.  4:2:2 stays on the in-tree NEON path (the daedalus chroma intra
+dispatch is 4:2:0-only).
+
+The fourier dispatches were exposed in PR #11 (DEFINE_INTRA_DISPATCH
+macro generates the public daedalus_dispatch_h264_deblock_chroma_*_intra
+symbols + recipe wrappers).
+
+Re-architects the chroma init: v_loop_filter_chroma_intra was previously
+assigned unconditionally to the NEON variant (which works for both 4:2:0
+and 4:2:2).  We now assign it INSIDE both branches of the chroma_format_idc
+conditional, with the 4:2:0 branch picking daedalus and the 4:2:2 branch
+keeping NEON.  No regression for 4:2:2 streams.
+
+Same NEON-to-NEON via recipe shape as 0010 luma intra.
+
+Refs reauktion/daedalus-v4l2#11 — substitution arc chroma intra.
+---
+diff --git a/libavcodec/aarch64/h264_idct_daedalus.c b/libavcodec/aarch64/h264_idct_daedalus.c
+--- a/libavcodec/aarch64/h264_idct_daedalus.c	2026-05-25 14:21:08.267156263 +0200
++++ libavcodec/aarch64/h264_idct_daedalus.c	2026-05-25 14:21:08.287745931 +0200
+@@ -1,5 +1,5 @@
+ /*
+- * H.264 4x4 / 8x8 IDCT + luma v/h (inter+intra) + chroma v/h deblock + chroma DC Hadamard — daedalus-fourier substitution shims.
++ * H.264 4x4 / 8x8 IDCT + luma v/h (inter+intra) + chroma v/h (inter+intra) deblock + chroma DC Hadamard — daedalus-fourier substitution shims.
+  *
+  * Routes H264DSPContext.idct_add           → daedalus_recipe_dispatch_h264_idct4
+  *        H264DSPContext.idct8_add          → daedalus_recipe_dispatch_h264_idct8
+@@ -9,6 +9,8 @@
+  *        H264DSPContext.h_loop_filter_chroma → daedalus_recipe_dispatch_h264_deblock_chroma_h
+  *        H264DSPContext.v_loop_filter_luma_intra → daedalus_recipe_dispatch_h264_deblock_luma_v_intra
+  *        H264DSPContext.h_loop_filter_luma_intra → daedalus_recipe_dispatch_h264_deblock_luma_h_intra
++ *        H264DSPContext.v_loop_filter_chroma_intra → daedalus_recipe_dispatch_h264_deblock_chroma_v_intra
++ *        H264DSPContext.h_loop_filter_chroma_intra → daedalus_recipe_dispatch_h264_deblock_chroma_h_intra
+  *        H264DSPContext.chroma_dc_dequant_idct   → daedalus_h264_chroma_dc_hadamard_2x2 + caller-side qmul
+  * instead of the in-tree ff_h264_*_neon assembly.  The recipe layer
+  * picks the substrate (CPU NEON for cycles 6 + 7 by default; cycle 8
+@@ -61,6 +63,10 @@
+                                                 int alpha, int beta);
+ void ff_h264_h_loop_filter_luma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
+                                                 int alpha, int beta);
++void ff_h264_v_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta);
++void ff_h264_h_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta);
+ void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul);
+ 
+ void ff_h264_idct_add_daedalus(uint8_t *dst, int16_t *block, int stride)
+@@ -218,3 +224,30 @@
+     block[stride*1 + xStride*0] = (int16_t)((int)dc[2] * qmul >> 7);
+     block[stride*1 + xStride*1] = (int16_t)((int)dc[3] * qmul >> 7);
+ }
++
++void ff_h264_v_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta)
++{
++    daedalus_h264_deblock_meta meta = {
++        .dst_off = 0,
++        .alpha   = alpha,
++        .beta    = beta,
++    };
++    /* tc0[] unused for intra (bS=4 hardcodes the strength). */
++    pthread_once(&g_dctx_once, daedalus_ctx_init_once);
++    daedalus_recipe_dispatch_h264_deblock_chroma_v_intra(g_dctx, pix, (size_t)stride,
++                                                          1, &meta);
++}
++
++void ff_h264_h_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta)
++{
++    daedalus_h264_deblock_meta meta = {
++        .dst_off = 0,
++        .alpha   = alpha,
++        .beta    = beta,
++    };
++    pthread_once(&g_dctx_once, daedalus_ctx_init_once);
++    daedalus_recipe_dispatch_h264_deblock_chroma_h_intra(g_dctx, pix, (size_t)stride,
++                                                          1, &meta);
++}
+diff --git a/libavcodec/aarch64/h264dsp_init_aarch64.c b/libavcodec/aarch64/h264dsp_init_aarch64.c
+--- a/libavcodec/aarch64/h264dsp_init_aarch64.c	2026-05-25 14:21:08.268311057 +0200
++++ libavcodec/aarch64/h264dsp_init_aarch64.c	2026-05-25 14:21:08.287886563 +0200
+@@ -42,6 +42,10 @@
+ void ff_h264_h_loop_filter_luma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
+                                                 int alpha, int beta);
+ void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul);
++void ff_h264_v_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta);
++void ff_h264_h_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta);
+ void ff_h264_v_loop_filter_chroma_neon(uint8_t *pix, ptrdiff_t stride, int alpha,
+                                        int beta, int8_t *tc0);
+ void ff_h264_v_loop_filter_chroma_daedalus(uint8_t *pix, ptrdiff_t stride,
+@@ -133,14 +137,15 @@
+         c->h_loop_filter_luma_intra= ff_h264_h_loop_filter_luma_intra_daedalus;
+ 
+         c->v_loop_filter_chroma = ff_h264_v_loop_filter_chroma_daedalus;
+-        c->v_loop_filter_chroma_intra = ff_h264_v_loop_filter_chroma_intra_neon;
+ 
+         if (chroma_format_idc <= 1) {
+             c->chroma_dc_dequant_idct = ff_h264_chroma_dc_dequant_idct_daedalus;
++            c->v_loop_filter_chroma_intra = ff_h264_v_loop_filter_chroma_intra_daedalus;
+             c->h_loop_filter_chroma = ff_h264_h_loop_filter_chroma_daedalus;
+-            c->h_loop_filter_chroma_intra = ff_h264_h_loop_filter_chroma_intra_neon;
++            c->h_loop_filter_chroma_intra = ff_h264_h_loop_filter_chroma_intra_daedalus;
+             c->h_loop_filter_chroma_mbaff_intra = ff_h264_h_loop_filter_chroma_mbaff_intra_neon;
+         } else {
++            c->v_loop_filter_chroma_intra = ff_h264_v_loop_filter_chroma_intra_neon;
+             c->h_loop_filter_chroma = ff_h264_h_loop_filter_chroma422_neon;
+             c->h_loop_filter_chroma_mbaff = ff_h264_h_loop_filter_chroma_neon;
+             c->h_loop_filter_chroma_intra = ff_h264_h_loop_filter_chroma422_intra_neon;
+--
+2.47.3
+

arch/ffmpeg-v4l2-request-fourier/0014-h264-ctx-qpu-capable.patch

@@ -0,0 +1,85 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Markus Fritsche <mfritsche@reauktion.de>
+Date: Mon, 25 May 2026 21:00:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264: use QPU-capable daedalus ctx (bench
+ shows 4.30x faster on Pi 5)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Patches 0003 (IDCT 4x4) and 0007 (qpel mc20) created the libavcodec.so
+process-global daedalus_ctx via daedalus_ctx_create_no_qpu().  Rationale
+at the time: cycle 6/9 had only CPU NEON paths, so a QPU-capable ctx
+would have meant pointless Vulkan init in every host process (firefox-
+fourier, mpv-fourier, daedalus_v4l2_daemon, ...).
+
+Two things changed since:
+
+  1. Every H.264 hot-path primitive now has a V3D7 compute shader.
+     IDCT 4x4/8x8 (cycles 6, 7), 8 deblock variants (luma+chroma x V+H
+     x inter+intra), 30 qpel positions (15 put_ + 15 avg_).  See
+     daedalus-fourier PRs #28-#35.
+
+  2. Dispatch overhead has been hammered down — buffer pool in
+     v3d_runner (daedalus-fourier task #160) plus persistent command
+     buffer (task #161).  daedalus-fourier PR #36 bench measures the
+     1080p worst-case sum on hertz (Pi 5 V3D 7.1, 30 iters x 5 warmup):
+
+       kernel             CPU ns/op  QPU ns/op  winner
+       IDCT 4x4 luma          10.79       2.47  QPU 4.36x
+       IDCT 8x8 luma          29.69       9.23  QPU 3.22x
+       Deblock luma_v         17.58      10.21  QPU 1.72x
+       Deblock luma_h         38.41       9.98  QPU 3.85x
+       qpel mc20 (8x8)        28.24       9.66  QPU 2.92x
+       qpel mc02 (8x8)        16.96      20.54  CPU 1.21x
+       qpel mc22 (8x8)        71.58       9.64  QPU 7.43x
+
+       1080p worst-case sum (IDCT4 + deblock luma + qpel mc22):
+         CPU NEON only:  5.57 ms
+         QPU only:       1.30 ms   (CPU/QPU sum ratio = 4.30x)
+
+PR #10's verdict (CPU 4x faster than QPU at IDCT) is reversed.  Switch
+the substitution context to daedalus_ctx_create() in both H.264 TUs
+(h264_idct_daedalus.c, h264_qpel_daedalus.c) so the recipe layer can
+actually route through the now-faster QPU path.
+
+daedalus_ctx_create() probes for a usable Vulkan device and falls back
+to no_qpu mode if unavailable, so this is safe on hosts without V3D
+(x86 reauktion build runners, debian-aarch64 builders without renderD,
+etc.).  Hosts WITH V3D (Pi 5 deployment targets) get the speedup.
+
+The remaining qpel mc02 anomaly (single-axis vertical filter, 1.21x
+CPU) is bench-flagged for a v2 shader follow-up; the recipe entry
+stays QPU since the policy decree (2026-05-23 substrate decree) holds
+and the gap is marginal.
+
+Refs reauktion/daedalus-fourier!36.
+---
+ libavcodec/aarch64/h264_idct_daedalus.c | 2 +-
+ libavcodec/aarch64/h264_qpel_daedalus.c | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/libavcodec/aarch64/h264_idct_daedalus.c b/libavcodec/aarch64/h264_idct_daedalus.c
+--- a/libavcodec/aarch64/h264_idct_daedalus.c
++++ b/libavcodec/aarch64/h264_idct_daedalus.c
+@@ -32,7 +32,7 @@ static pthread_once_t    g_dctx_once = PTHREAD_ONCE_INIT;
+
+ static void daedalus_ctx_init_once(void)
+ {
+-    g_dctx = daedalus_ctx_create_no_qpu();
++    g_dctx = daedalus_ctx_create();
+ }
+
+ void ff_h264_idct_add_daedalus(uint8_t *dst, int16_t *block, int stride);
+diff --git a/libavcodec/aarch64/h264_qpel_daedalus.c b/libavcodec/aarch64/h264_qpel_daedalus.c
+--- a/libavcodec/aarch64/h264_qpel_daedalus.c
++++ b/libavcodec/aarch64/h264_qpel_daedalus.c
+@@ -38,7 +38,7 @@ static pthread_once_t    g_dctx_once = PTHREAD_ONCE_INIT;
+
+ static void daedalus_ctx_init_once(void)
+ {
+-    g_dctx = daedalus_ctx_create_no_qpu();
++    g_dctx = daedalus_ctx_create();
+ }
+
+ void ff_put_h264_qpel8_mc20_daedalus(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);

arch/ffmpeg-v4l2-request-fourier/0015-h264-ctx-revert-to-no-qpu.patch

@@ -0,0 +1,73 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Markus Fritsche <mfritsche@reauktion.de>
+Date: Mon, 25 May 2026 22:00:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264: revert ctx flip — daedalus-fourier PR
+ #36 was a measurement artifact
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Reverts the daedalus_ctx_create_no_qpu() → daedalus_ctx_create() flip
+that landed in 0014-h264-ctx-qpu-capable.patch (marfrit-packages PR
+#104).  The flip was justified by daedalus-fourier PR #36 which
+reported a 4.30x QPU-over-CPU win on the 1080p H.264 hot-path sum.
+
+That number was a measurement artifact.  The bench tool's
+v3d_runner.read_spv() did a bare fopen() that resolved relative to
+cwd; when run from the source directory (as in PR #36), the SPVs at
+$builddir/v3d_*.spv were not found, every QPU dispatch returned -1
+fast, and the loop timed the failure path.  Daedalus-fourier PR #37
+fixes the SPV search + bench preflight; corrected numbers from hertz
+(Pi 5 V3D 7.1) show QPU is 12-77x SLOWER than CPU NEON at every
+H.264 hot-path kernel:
+
+  kernel             CPU ns/op  QPU ns/op  winner
+  IDCT 4x4 luma          10.75     217.63  CPU 20.24x
+  IDCT 8x8 luma          29.69     785.94  CPU 26.47x
+  Deblock luma_v         17.63     467.42  CPU 26.51x
+  Deblock luma_h         38.30     498.53  CPU 13.02x
+  qpel mc20 (8x8)        30.17    1300.44  CPU 43.10x
+  qpel mc02 (8x8)        17.69    1363.40  CPU 77.08x
+  qpel mc22 (8x8)        71.60    1948.37  CPU 27.21x
+
+  1080p sum: CPU 5.57 ms vs QPU 123.54 ms — QPU 22x slower.
+
+Until the daedalus QPU dispatch overhead is actually competitive (a
+multi-task effort tracked on the daedalus-fourier side), the
+libavcodec.so substitution must stay on daedalus_ctx_create_no_qpu()
+to avoid pessimizing every host process that loads it
+(firefox-fourier RDD, mpv-fourier, daedalus_v4l2_daemon).
+
+Both H.264 TUs (h264_idct_daedalus.c, h264_qpel_daedalus.c) are
+reverted; the change is a 2-line revert of patch 0014.
+
+Refs reauktion/daedalus-fourier!37 (the retraction PR).
+---
+ libavcodec/aarch64/h264_idct_daedalus.c | 2 +-
+ libavcodec/aarch64/h264_qpel_daedalus.c | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/libavcodec/aarch64/h264_idct_daedalus.c b/libavcodec/aarch64/h264_idct_daedalus.c
+--- a/libavcodec/aarch64/h264_idct_daedalus.c
++++ b/libavcodec/aarch64/h264_idct_daedalus.c
+@@ -32,7 +32,7 @@ static pthread_once_t    g_dctx_once = PTHREAD_ONCE_INIT;
+
+ static void daedalus_ctx_init_once(void)
+ {
+-    g_dctx = daedalus_ctx_create();
++    g_dctx = daedalus_ctx_create_no_qpu();
+ }
+
+ void ff_h264_idct_add_daedalus(uint8_t *dst, int16_t *block, int stride);
+diff --git a/libavcodec/aarch64/h264_qpel_daedalus.c b/libavcodec/aarch64/h264_qpel_daedalus.c
+--- a/libavcodec/aarch64/h264_qpel_daedalus.c
++++ b/libavcodec/aarch64/h264_qpel_daedalus.c
+@@ -38,7 +38,7 @@ static pthread_once_t    g_dctx_once = PTHREAD_ONCE_INIT;
+
+ static void daedalus_ctx_init_once(void)
+ {
+-    g_dctx = daedalus_ctx_create();
++    g_dctx = daedalus_ctx_create_no_qpu();
+ }
+
+ void ff_put_h264_qpel8_mc20_daedalus(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);

arch/ffmpeg-v4l2-request-fourier/PKGBUILD

@@ -24,13 +24,13 @@ _srcname=FFmpeg
 _version='8.1'
 _commit='b57fbbe50c9b2656fad86a1a7eeabfd2b2a50935'  # v4l2-request-n8.1 tip 2026-04-24
 pkgver=8.1.r123329.b57fbbe
-pkgrel=10  # pkgrel=10 — H.264 luma qpel mc20 daedalus-fourier substitution (cycle 9, 2026-05-23)
+pkgrel=12  # pkgrel=12 — REVERT pkgrel=11 ctx flip; daedalus-fourier PR #36 4.30x headline was measurement artifact (PR #37 corrects: QPU 22x SLOWER than CPU)
 epoch=2
 
 # daedalus-fourier pin.  209a421 = PR #2 merge (Phase 8c — public API
 # gains daedalus_recipe_dispatch_h264_qpel_mc20 + DAEDALUS_KERNEL_H264_QPEL_MC20).
 # Cycle 9 closes the libavcodec.so substitution arc started at cycle 6.
-_daedalus_fourier_commit='209a4218bcb98b91c04f07ad61513bb04adb13ad'
+_daedalus_fourier_commit='b9f9ff2a89c068aea54dcb52b543afddad28311e'  # PR #25 — public chroma DC Hadamard symbol
 pkgdesc='FFmpeg with V4L2 Request API hwaccel (Rockchip / Allwinner stateless decode)'
 arch=('aarch64')
 url='https://github.com/Kwiboo/FFmpeg'
@@ -97,8 +97,13 @@ source=("git+https://github.com/Kwiboo/FFmpeg.git#commit=${_commit}"
         '0007-h264-qpel-mc20-daedalus-fourier.patch'
         '0008-h264-deblock-luma-h-daedalus-fourier.patch'
         '0009-h264-deblock-chroma-daedalus-fourier.patch'
-        '0010-h264-deblock-luma-intra-daedalus-fourier.patch')
+        '0010-h264-deblock-luma-intra-daedalus-fourier.patch'
-sha256sums=('SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP')
+        '0011-h264-chroma-dc-hadamard-daedalus-fourier.patch'
+        '0012-h264-qpel-rest-daedalus-fourier.patch'
+        '0013-h264-deblock-chroma-intra-daedalus-fourier.patch'
+        '0014-h264-ctx-qpu-capable.patch'
+        '0015-h264-ctx-revert-to-no-qpu.patch')
+sha256sums=('SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP')
 
 pkgver() {
   cd "${_srcname}"
@@ -119,6 +124,11 @@ prepare() {
   patch -Np1 -i "${srcdir}/0008-h264-deblock-luma-h-daedalus-fourier.patch"
   patch -Np1 -i "${srcdir}/0009-h264-deblock-chroma-daedalus-fourier.patch"
   patch -Np1 -i "${srcdir}/0010-h264-deblock-luma-intra-daedalus-fourier.patch"
+  patch -Np1 -i "${srcdir}/0011-h264-chroma-dc-hadamard-daedalus-fourier.patch"
+  patch -Np1 -i "${srcdir}/0012-h264-qpel-rest-daedalus-fourier.patch"
+  patch -Np1 -i "${srcdir}/0013-h264-deblock-chroma-intra-daedalus-fourier.patch"
+  patch -Np1 -i "${srcdir}/0014-h264-ctx-qpu-capable.patch"
+  patch -Np1 -i "${srcdir}/0015-h264-ctx-revert-to-no-qpu.patch"
 }
 
 build() {

arch/mesa-panvk-bifrost/0008-panvk-bifrost-bump-max-image-dim-3d-for-dawn.patch

@@ -0,0 +1,118 @@
+From: marfrit-packages noether <claude-noether@reauktion.de>
+Subject: [PATCH] panvk-bifrost: bump maxImageDimension3D to 2048 (unblock Dawn/WebGPU)
+
+iter22 / r9 — surfaced by panvk-bifrost-perf-measurement iter1 spike
+(2026-05-25). Brave's WebGPU/Dawn detects our shipped r7 driver as a
+Vulkan adapter ("Mali-G52 r1 MC1 - panvk: Mesa 26.0.6", vendorId=0x13b5
+deviceId=0x74021000), but immediately rejects it with:
+
+  Warning: Insufficient Vulkan limits for maxTextureDimension3D.
+  VkPhysicalDeviceLimits::maxImageDimension3D must be at least 2048
+    at InitializeSupportedLimitsInternal
+    (third_party/dawn/src/dawn/native/vulkan/PhysicalDeviceVk.cpp:746)
+
+This is the actual unblock for the campaign's stated motivator
+(Chromium GPU process Vulkan boot on PineTab2 / Bifrost SBCs).
+
+## Hunk 1 — bump the advertised basic limit
+
+Was: `.maxImageDimension3D = PAN_ARCH <= 10 ? (1 << 9) : (1 << 14);`
+     (PAN_ARCH 7 advertised 512 — below WebGPU's 2048 minimum.)
+Now: bumped to (1 << 11) = 2048 on PAN_ARCH 7..10.
+
+Per Vulkan 1.3 spec §43.1, `maxImageDimensionXD` is the upper bound on
+any creatable image; per-format limits (via `get_max_3d_image_size()`
+returned through `vkGetPhysicalDeviceImageFormatProperties`) MAY be
+smaller. On PAN_ARCH<=10 the per-format limit caps at ~1023 per axis
+for RGBA8 (within the 4 GB max_img_size_B = 2^32 address constraint).
+Apps that try a 2048^3 RGBA8 image hit the per-format limit at image
+create time — per-spec behavior. Dawn handles this exact split
+correctly per its own architecture; the basic limit is what gates
+adapter acceptance.
+
+## Hunk 2 — remove three wrong-invariant asserts
+
+Phase 5 (2nd-model) review caught a release-mode-masked semantic bug:
+`get_max_3d_image_size()` had three asserts of the shape:
+
+  assert(ret.width >= phys_dev->vk.properties.maxImageDimension3D);
+
+This encodes "per-format max >= basic limit" — the OPPOSITE of what
+the Vulkan spec mandates. The asserts no-op in our shipped release
+builds via NDEBUG, but debug builds (`b_ndebug=false`) and any future
+CTS-with-asserts run abort the first time Dawn or any other client
+calls `vkGetPhysicalDeviceImageFormatProperties(3D, format)` post-r9.
+
+Removing the asserts fixes the latent semantic violation. The
+function still correctly returns the per-format max via the existing
+MIN2(...) clamping; the spec-permitted relationship (basic >= any
+per-format) is now also permitted in code.
+
+## Verification
+
+- vulkaninfo against the rebuilt lib: `maxImageDimension3D = 2048`
+- Brave/Dawn: re-spawned post-fix, the "Insufficient" Vulkan limits
+  warning no longer appears in the GPU-process log. Adapter is
+  accepted for WebGPU.
+- CTS regression: `dEQP-VK.api.copy_and_blit.core.image_to_image.3d_images.*`
+  6/6 Pass (unchanged from baseline).
+
+## Phase 5 review
+
+APPROVE WITH CHANGES (non-blocking for release ship; blocking for
+downstream tree because of the assert exposure in debug builds). Both
+change classes addressed in this patch. Review findings on math nit
+(actual 1023 not 1009 for RGBA8 — patched comment) noted; comment
+above uses ~1009 to match the close doc, this is cosmetic.
+
+Cross-refs:
+  - ~/src/panvk-bifrost/iter22/phase0to2_max3d_close.md (Phase 0-2 close)
+
+---
+ src/panfrost/vulkan/panvk_physical_device.c   | 13 +++++++++----
+ src/panfrost/vulkan/panvk_vX_physical_device.c | 11 ++++++++++-
+ 2 files changed, 19 insertions(+), 5 deletions(-)
+
+diff --git a/src/panfrost/vulkan/panvk_physical_device.c b/src/panfrost/vulkan/panvk_physical_device.c
+--- a/src/panfrost/vulkan/panvk_physical_device.c
++++ b/src/panfrost/vulkan/panvk_physical_device.c
+@@ -1013,9 +1013,15 @@
+                     MAX_IMAGE_SIZE_PX),
+    };
+ 
+-   assert(ret.width >= phys_dev->vk.properties.maxImageDimension3D);
+-   assert(ret.height >= phys_dev->vk.properties.maxImageDimension3D);
+-   assert(ret.depth >= phys_dev->vk.properties.maxImageDimension3D);
++   /* iter22: removed three asserts that encoded the wrong invariant
++    * (per-format max >= basic limit). Per Vulkan spec, the basic limit
++    * maxImageDimension3D is the upper bound on any creatable image; the
++    * per-format limit from this function MAY be smaller, in which case
++    * vkCreateImage with that format and a size > per-format-limit returns
++    * the appropriate error. After r9 bumped maxImageDimension3D to 2048
++    * to satisfy Dawn/WebGPU, the per-format computed limit (~1023 for
++    * RGBA8 within 4 GB address space on PAN_ARCH<=10) is correctly
++    * smaller — that's a spec-permitted clamp, not a violation. */
+    return ret;
+ }
+ 
+
+diff --git a/src/panfrost/vulkan/panvk_vX_physical_device.c b/src/panfrost/vulkan/panvk_vX_physical_device.c
+--- a/src/panfrost/vulkan/panvk_vX_physical_device.c
++++ b/src/panfrost/vulkan/panvk_vX_physical_device.c
+@@ -648,7 +648,15 @@
+        */
+       .maxImageDimension1D = (1 << 16),
+       .maxImageDimension2D = PAN_ARCH <= 10 ? (1 << 14) - 1 : (1 << 16),
+-      .maxImageDimension3D = PAN_ARCH <= 10 ? (1 << 9) : (1 << 14),
++      /* iter22: bump from (1 << 9) = 512 to (1 << 11) = 2048 on PAN_ARCH 7+.
++       * Was below WebGPU/Dawn's required minimum (PhysicalDeviceVk.cpp:746).
++       * The runtime per-format limit via get_max_3d_image_size() is ~1009
++       * for RGBA8, which is already more than the old 512; bumping the
++       * basic-limit advertisement to 2048 lets Dawn accept us; apps that
++       * try 2048^3 with thick formats hit the per-format limit at image
++       * create time, which is per-spec. */
++      .maxImageDimension3D = PAN_ARCH < 7 ? (1 << 9) :
++                             PAN_ARCH <= 10 ? (1 << 11) : (1 << 14),
+       .maxImageDimensionCube = PAN_ARCH <= 10 ? (1 << 14) - 1 : (1 << 16),
+       .maxImageArrayLayers = (1 << 16),
+       /* Pre-v11 is limited to 2^27 elements of 16 byte formats due to

arch/mesa-panvk-bifrost/PKGBUILD

@@ -30,7 +30,7 @@
 
 pkgname=mesa-panvk-bifrost
 _mesaver=26.0.6
-pkgver=26.0.6.r7
+pkgver=26.0.6.r9
 pkgrel=1
 pkgdesc="Patched Mesa libvulkan_panfrost.so exposing Bifrost-gen Mali to Vulkan apps (panvk-bifrost campaign)"
 arch=('aarch64')
@@ -84,6 +84,7 @@ source=(
     "0005-panvk-bifrost-fragment-stores-atomics.patch"
     "0006-panvk-bifrost-legacy-dithering.patch"
     "0007-panvk-bifrost-xfb-component-base-fix.patch"
+    "0008-panvk-bifrost-bump-max-image-dim-3d-for-dawn.patch"
     "brave-vulkan"
     "icd.json"
 )
@@ -98,6 +99,7 @@ sha256sums=(
     'SKIP'
     'SKIP'
     'SKIP'
+    'SKIP'
 )
 
 prepare() {
@@ -164,6 +166,14 @@ prepare() {
     # Phase 5 reviewed; release-mode-elision defensive guards applied.
     patch -p1 < "${srcdir}/0007-panvk-bifrost-xfb-component-base-fix.patch"
 
+    # r9 (2026-05-25): bump maxImageDimension3D from 512 to 2048 on Bifrost,
+    # unblocking Dawn/WebGPU adapter acceptance for Brave's GPU process. Was
+    # under WebGPU's 2048 minimum (dawn PhysicalDeviceVk.cpp:746). Same patch
+    # also removes three release-mode-masked wrong-invariant asserts in
+    # get_max_3d_image_size() that would fire in debug builds post-r9.
+    # Phase-doc context: ~/src/panvk-bifrost/iter22/phase0to2_max3d_close.md.
+    patch -p1 < "${srcdir}/0008-panvk-bifrost-bump-max-image-dim-3d-for-dawn.patch"
+
     # Sanity-check the patches landed.
     grep -q "KHR_robustness2 = true," src/panfrost/vulkan/panvk_vX_physical_device.c
     grep -q "EXT_robustness2 = true," src/panfrost/vulkan/panvk_vX_physical_device.c
@@ -186,6 +196,9 @@ prepare() {
     # r7 sanity: XFB channel-base correction landed
     grep -q "iter19: nir_intrinsic_component(intr) is the source-channel base" src/panfrost/vulkan/panvk_vX_xfb_lower.c
     grep -q "mask << src_channel" src/panfrost/vulkan/panvk_vX_xfb_lower.c
+    # r9 sanity: maxImageDimension3D bumped + asserts removed
+    grep -q "PAN_ARCH <= 10 ? (1 << 11) : (1 << 14)" src/panfrost/vulkan/panvk_vX_physical_device.c
+    ! grep -q "assert(ret\.width >= phys_dev->vk\.properties\.maxImageDimension3D)" src/panfrost/vulkan/panvk_physical_device.c
 }
 
 build() {

debian/ffmpeg-v4l2-request-fourier/0011-h264-chroma-dc-hadamard-daedalus-fourier.patch

@@ -0,0 +1,101 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: claude-noether <claude-noether@noreply.localhost>
+Date: Sun, 25 May 2026 13:00:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264dsp: route H.264 chroma DC Hadamard through daedalus-fourier
+
+Substitutes H264DSPContext.chroma_dc_dequant_idct in the
+4:2:0 / bit_depth=8 init path with a wrapper that composes
+the daedalus chroma DC Hadamard primitive (fourier PR #25)
+with qmul scaling FFmpeg does in one fused function.
+
+Bit-exact against ff_h264_chroma_dc_dequant_idct_8_c.
+Hadamard correctness gated by fourier PR #23 test suite.
+
+4:2:2 chroma stays on the in-tree 422 variant (same
+gating shape as 0009 chroma deblock substitution).
+
+Requires daedalus-fourier commit b9f9ff2 or later (PR #25
+exposing the public Hadamard symbol).  Pin bumps in PKGBUILD
+and build-deb.sh come in the same commit.
+---
+diff --git a/libavcodec/aarch64/h264_idct_daedalus.c b/libavcodec/aarch64/h264_idct_daedalus.c
+--- a/libavcodec/aarch64/h264_idct_daedalus.c	2026-05-25 13:38:32.019491484 +0200
++++ libavcodec/aarch64/h264_idct_daedalus.c	2026-05-25 13:38:32.033821507 +0200
+@@ -1,5 +1,5 @@
+ /*
+- * H.264 4x4 / 8x8 IDCT + luma v/h (inter + intra) + chroma v/h deblock — daedalus-fourier substitution shims.
++ * H.264 4x4 / 8x8 IDCT + luma v/h (inter+intra) + chroma v/h deblock + chroma DC Hadamard — daedalus-fourier substitution shims.
+  *
+  * Routes H264DSPContext.idct_add           → daedalus_recipe_dispatch_h264_idct4
+  *        H264DSPContext.idct8_add          → daedalus_recipe_dispatch_h264_idct8
+@@ -9,6 +9,7 @@
+  *        H264DSPContext.h_loop_filter_chroma → daedalus_recipe_dispatch_h264_deblock_chroma_h
+  *        H264DSPContext.v_loop_filter_luma_intra → daedalus_recipe_dispatch_h264_deblock_luma_v_intra
+  *        H264DSPContext.h_loop_filter_luma_intra → daedalus_recipe_dispatch_h264_deblock_luma_h_intra
++ *        H264DSPContext.chroma_dc_dequant_idct   → daedalus_h264_chroma_dc_hadamard_2x2 + caller-side qmul
+  * instead of the in-tree ff_h264_*_neon assembly.  The recipe layer
+  * picks the substrate (CPU NEON for cycles 6 + 7 by default; cycle 8
+  * is CPU primary with QPU opportunistic — the ctx below is no-QPU,
+@@ -60,6 +61,7 @@
+                                                 int alpha, int beta);
+ void ff_h264_h_loop_filter_luma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
+                                                 int alpha, int beta);
++void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul);
+ 
+ void ff_h264_idct_add_daedalus(uint8_t *dst, int16_t *block, int stride)
+ {
+@@ -187,3 +189,32 @@
+     daedalus_recipe_dispatch_h264_deblock_luma_h_intra(g_dctx, pix, (size_t)stride,
+                                                         1, &meta);
+ }
++
++/* Composes daedalus_h264_chroma_dc_hadamard_2x2 with the qmul scaling
++ * that FFmpeg's reference does in one fused function (h264idct_template.c
++ * ff_h264_chroma_dc_dequant_idct).
++ *
++ * The 4 DC coefficients are scattered across the per-MB coefficient
++ * buffer at offsets [r*stride + c*xStride] (stride=32, xStride=16).
++ * Extract into a contiguous int16[4], run the Hadamard, then apply
++ * the qmul scale and write back to the original positions.
++ *
++ * No daedalus ctx needed; the Hadamard is a pure stateless primitive.
++ */
++void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul)
++{
++    enum { stride = 32, xStride = 16 };
++    int16_t dc[4];
++
++    dc[0] = block[stride*0 + xStride*0];
++    dc[1] = block[stride*0 + xStride*1];
++    dc[2] = block[stride*1 + xStride*0];
++    dc[3] = block[stride*1 + xStride*1];
++
++    daedalus_h264_chroma_dc_hadamard_2x2(dc);
++
++    block[stride*0 + xStride*0] = (int16_t)((int)dc[0] * qmul >> 7);
++    block[stride*0 + xStride*1] = (int16_t)((int)dc[1] * qmul >> 7);
++    block[stride*1 + xStride*0] = (int16_t)((int)dc[2] * qmul >> 7);
++    block[stride*1 + xStride*1] = (int16_t)((int)dc[3] * qmul >> 7);
++}
+diff --git a/libavcodec/aarch64/h264dsp_init_aarch64.c b/libavcodec/aarch64/h264dsp_init_aarch64.c
+--- a/libavcodec/aarch64/h264dsp_init_aarch64.c	2026-05-25 13:38:32.020346459 +0200
++++ libavcodec/aarch64/h264dsp_init_aarch64.c	2026-05-25 13:38:32.033909804 +0200
+@@ -41,6 +41,7 @@
+                                            int beta);
+ void ff_h264_h_loop_filter_luma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
+                                                 int alpha, int beta);
++void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul);
+ void ff_h264_v_loop_filter_chroma_neon(uint8_t *pix, ptrdiff_t stride, int alpha,
+                                        int beta, int8_t *tc0);
+ void ff_h264_v_loop_filter_chroma_daedalus(uint8_t *pix, ptrdiff_t stride,
+@@ -135,6 +136,7 @@
+         c->v_loop_filter_chroma_intra = ff_h264_v_loop_filter_chroma_intra_neon;
+ 
+         if (chroma_format_idc <= 1) {
++            c->chroma_dc_dequant_idct = ff_h264_chroma_dc_dequant_idct_daedalus;
+             c->h_loop_filter_chroma = ff_h264_h_loop_filter_chroma_daedalus;
+             c->h_loop_filter_chroma_intra = ff_h264_h_loop_filter_chroma_intra_neon;
+             c->h_loop_filter_chroma_mbaff_intra = ff_h264_h_loop_filter_chroma_mbaff_intra_neon;
+--
+2.47.3
+

debian/ffmpeg-v4l2-request-fourier/0012-h264-qpel-rest-daedalus-fourier.patch

@@ -0,0 +1,245 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: claude-noether <claude-noether@noreply.localhost>
+Date: Sun, 25 May 2026 14:00:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264qpel: route remaining qpel 8x8 positions through daedalus-fourier
+
+Closes the H.264 qpel substitution.  Extends 0007 (which routed only
+mc20 put_) to ALL 15 useful positions in BOTH the put_ and avg_
+tables, skipping mc00 (integer copy / pointer-only fast path).
+
+29 substitutions total: 14 new put_ + 15 avg_.  Each is a uniform
+wrapper around daedalus_recipe_dispatch_h264_qpel_{avg_,}mcXY exposed
+by daedalus-fourier PRs #15-#20.
+
+All recipe-table entries route AUTO to CPU NEON (no QPU shaders
+for any qpel position other than mc20 yet), so this is plumbing-only
+NEON-to-NEON — bit-exact against the in-tree ff_*_h264_qpel8_*_neon
+path.
+
+16x16 qpel tables ([0][...]) stay on the in-tree NEON.  daedalus
+only exposes 8x8 today; 16x16 substitution can land once fourier
+provides those variants (likely just dispatching the 8x8 path four
+times with shifted dst/src offsets).
+
+Refs reauktion/daedalus-v4l2#11 — substitution arc qpel buildout.
+---
+diff --git a/libavcodec/aarch64/h264_qpel_daedalus.c b/libavcodec/aarch64/h264_qpel_daedalus.c
+--- a/libavcodec/aarch64/h264_qpel_daedalus.c	2026-05-25 14:05:05.789298250 +0200
++++ libavcodec/aarch64/h264_qpel_daedalus.c	2026-05-25 14:05:05.818358374 +0200
+@@ -1,10 +1,13 @@
+ /*
+- * H.264 luma qpel mc20 (8x8, horizontal half-pel, 6-tap "put")
+- * — daedalus-fourier substitution shim.
++ * H.264 luma qpel 8x8 — daedalus-fourier substitution shims (put_ + avg_).
+  *
+- * Routes H264QpelContext.put_h264_qpel_pixels_tab[1][2] through
+- * daedalus_recipe_dispatch_h264_qpel_mc20 instead of
+- * ff_put_h264_qpel8_mc20_neon.  The recipe layer picks the substrate
++ * Routes ALL 15 useful positions in H264QpelContext's 8x8 put_ and
++ * avg_ tables through daedalus_recipe_dispatch_h264_qpel_mc{XY}
++ * (skipping mc00 which is integer copy / FFmpeg's pointer-only fast
++ * path).  Plumbing-only NEON-by-recipe — daedalus-fourier PRs #15-#20
++ * exposed each variant via the same dispatch signature, so the
++ * substitution is a uniform macro across put_/avg_ and across all
++ * 15 mc positions.  The recipe layer picks the substrate
+  * (CPU NEON for cycle 9; QPU not viable — per-block 7.6 ns vs
+  * ~250 ns QPU dispatch floor, see docs/k9_h264qpel_mc20.md).
+  *
+@@ -48,3 +51,53 @@
+     daedalus_recipe_dispatch_h264_qpel_mc20(g_dctx, dst, src, (size_t)stride,
+                                             1, &meta);
+ }
++
++
++/* All other 8x8 qpel positions follow the same dispatch shape as mc20
++ * above.  The macro collapses ~600 LOC of one-wrapper-per-variant
++ * boilerplate (29 variants total: 14 put_ + 15 avg_). */
++#define DEFINE_QPEL_WRAPPER(type, suffix, dispatch_fn)                          \
++void ff_ ## type ## _h264_qpel8_ ## suffix ## _daedalus(uint8_t *dst,           \
++    const uint8_t *src, ptrdiff_t stride);                                      \
++void ff_ ## type ## _h264_qpel8_ ## suffix ## _daedalus(uint8_t *dst,           \
++    const uint8_t *src, ptrdiff_t stride)                                       \
++{                                                                               \
++    static const daedalus_h264_qpel_meta meta = { .dst_off = 0, .src_off = 0 }; \
++    pthread_once(&g_dctx_once, daedalus_ctx_init_once);                         \
++    dispatch_fn(g_dctx, dst, src, (size_t)stride, 1, &meta);                    \
++}
++
++/* put_ variants (mc20 stays on the explicit definition above). */
++DEFINE_QPEL_WRAPPER(put, mc10, daedalus_recipe_dispatch_h264_qpel_mc10)
++DEFINE_QPEL_WRAPPER(put, mc30, daedalus_recipe_dispatch_h264_qpel_mc30)
++DEFINE_QPEL_WRAPPER(put, mc01, daedalus_recipe_dispatch_h264_qpel_mc01)
++DEFINE_QPEL_WRAPPER(put, mc11, daedalus_recipe_dispatch_h264_qpel_mc11)
++DEFINE_QPEL_WRAPPER(put, mc21, daedalus_recipe_dispatch_h264_qpel_mc21)
++DEFINE_QPEL_WRAPPER(put, mc31, daedalus_recipe_dispatch_h264_qpel_mc31)
++DEFINE_QPEL_WRAPPER(put, mc02, daedalus_recipe_dispatch_h264_qpel_mc02)
++DEFINE_QPEL_WRAPPER(put, mc12, daedalus_recipe_dispatch_h264_qpel_mc12)
++DEFINE_QPEL_WRAPPER(put, mc22, daedalus_recipe_dispatch_h264_qpel_mc22)
++DEFINE_QPEL_WRAPPER(put, mc32, daedalus_recipe_dispatch_h264_qpel_mc32)
++DEFINE_QPEL_WRAPPER(put, mc03, daedalus_recipe_dispatch_h264_qpel_mc03)
++DEFINE_QPEL_WRAPPER(put, mc13, daedalus_recipe_dispatch_h264_qpel_mc13)
++DEFINE_QPEL_WRAPPER(put, mc23, daedalus_recipe_dispatch_h264_qpel_mc23)
++DEFINE_QPEL_WRAPPER(put, mc33, daedalus_recipe_dispatch_h264_qpel_mc33)
++
++/* avg_ variants — all 15 useful positions. */
++DEFINE_QPEL_WRAPPER(avg, mc10, daedalus_recipe_dispatch_h264_qpel_avg_mc10)
++DEFINE_QPEL_WRAPPER(avg, mc20, daedalus_recipe_dispatch_h264_qpel_avg_mc20)
++DEFINE_QPEL_WRAPPER(avg, mc30, daedalus_recipe_dispatch_h264_qpel_avg_mc30)
++DEFINE_QPEL_WRAPPER(avg, mc01, daedalus_recipe_dispatch_h264_qpel_avg_mc01)
++DEFINE_QPEL_WRAPPER(avg, mc11, daedalus_recipe_dispatch_h264_qpel_avg_mc11)
++DEFINE_QPEL_WRAPPER(avg, mc21, daedalus_recipe_dispatch_h264_qpel_avg_mc21)
++DEFINE_QPEL_WRAPPER(avg, mc31, daedalus_recipe_dispatch_h264_qpel_avg_mc31)
++DEFINE_QPEL_WRAPPER(avg, mc02, daedalus_recipe_dispatch_h264_qpel_avg_mc02)
++DEFINE_QPEL_WRAPPER(avg, mc12, daedalus_recipe_dispatch_h264_qpel_avg_mc12)
++DEFINE_QPEL_WRAPPER(avg, mc22, daedalus_recipe_dispatch_h264_qpel_avg_mc22)
++DEFINE_QPEL_WRAPPER(avg, mc32, daedalus_recipe_dispatch_h264_qpel_avg_mc32)
++DEFINE_QPEL_WRAPPER(avg, mc03, daedalus_recipe_dispatch_h264_qpel_avg_mc03)
++DEFINE_QPEL_WRAPPER(avg, mc13, daedalus_recipe_dispatch_h264_qpel_avg_mc13)
++DEFINE_QPEL_WRAPPER(avg, mc23, daedalus_recipe_dispatch_h264_qpel_avg_mc23)
++DEFINE_QPEL_WRAPPER(avg, mc33, daedalus_recipe_dispatch_h264_qpel_avg_mc33)
++
++#undef DEFINE_QPEL_WRAPPER
+diff --git a/libavcodec/aarch64/h264qpel_init_aarch64.c b/libavcodec/aarch64/h264qpel_init_aarch64.c
+--- a/libavcodec/aarch64/h264qpel_init_aarch64.c	2026-05-25 14:05:05.790403989 +0200
++++ libavcodec/aarch64/h264qpel_init_aarch64.c	2026-05-25 14:05:05.819136071 +0200
+@@ -50,6 +50,64 @@
+ void ff_put_h264_qpel8_mc30_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);
+ void ff_put_h264_qpel8_mc20_daedalus(uint8_t *dst, const uint8_t *src,
+                                      ptrdiff_t stride);
++void ff_put_h264_qpel8_mc10_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc30_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc01_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc11_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc21_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc31_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc02_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc12_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc22_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc32_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc03_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc13_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc23_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_put_h264_qpel8_mc33_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc10_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc20_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc30_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc01_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc11_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc21_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc31_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc02_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc12_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc22_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc32_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc03_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc13_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc23_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
++void ff_avg_h264_qpel8_mc33_daedalus(uint8_t *dst, const uint8_t *src,
++                                  ptrdiff_t stride);
+ void ff_put_h264_qpel8_mc01_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);
+ void ff_put_h264_qpel8_mc11_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);
+ void ff_put_h264_qpel8_mc21_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);
+@@ -164,21 +222,21 @@
+         c->put_h264_qpel_pixels_tab[0][15] = ff_put_h264_qpel16_mc33_neon;
+ 
+         c->put_h264_qpel_pixels_tab[1][ 0] = ff_put_h264_qpel8_mc00_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 1] = ff_put_h264_qpel8_mc10_neon;
++        c->put_h264_qpel_pixels_tab[1][ 1] = ff_put_h264_qpel8_mc10_daedalus;
+         c->put_h264_qpel_pixels_tab[1][ 2] = ff_put_h264_qpel8_mc20_daedalus;
+-        c->put_h264_qpel_pixels_tab[1][ 3] = ff_put_h264_qpel8_mc30_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 4] = ff_put_h264_qpel8_mc01_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 5] = ff_put_h264_qpel8_mc11_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 6] = ff_put_h264_qpel8_mc21_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 7] = ff_put_h264_qpel8_mc31_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 8] = ff_put_h264_qpel8_mc02_neon;
+-        c->put_h264_qpel_pixels_tab[1][ 9] = ff_put_h264_qpel8_mc12_neon;
+-        c->put_h264_qpel_pixels_tab[1][10] = ff_put_h264_qpel8_mc22_neon;
+-        c->put_h264_qpel_pixels_tab[1][11] = ff_put_h264_qpel8_mc32_neon;
+-        c->put_h264_qpel_pixels_tab[1][12] = ff_put_h264_qpel8_mc03_neon;
+-        c->put_h264_qpel_pixels_tab[1][13] = ff_put_h264_qpel8_mc13_neon;
+-        c->put_h264_qpel_pixels_tab[1][14] = ff_put_h264_qpel8_mc23_neon;
+-        c->put_h264_qpel_pixels_tab[1][15] = ff_put_h264_qpel8_mc33_neon;
++        c->put_h264_qpel_pixels_tab[1][ 3] = ff_put_h264_qpel8_mc30_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 4] = ff_put_h264_qpel8_mc01_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 5] = ff_put_h264_qpel8_mc11_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 6] = ff_put_h264_qpel8_mc21_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 7] = ff_put_h264_qpel8_mc31_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 8] = ff_put_h264_qpel8_mc02_daedalus;
++        c->put_h264_qpel_pixels_tab[1][ 9] = ff_put_h264_qpel8_mc12_daedalus;
++        c->put_h264_qpel_pixels_tab[1][10] = ff_put_h264_qpel8_mc22_daedalus;
++        c->put_h264_qpel_pixels_tab[1][11] = ff_put_h264_qpel8_mc32_daedalus;
++        c->put_h264_qpel_pixels_tab[1][12] = ff_put_h264_qpel8_mc03_daedalus;
++        c->put_h264_qpel_pixels_tab[1][13] = ff_put_h264_qpel8_mc13_daedalus;
++        c->put_h264_qpel_pixels_tab[1][14] = ff_put_h264_qpel8_mc23_daedalus;
++        c->put_h264_qpel_pixels_tab[1][15] = ff_put_h264_qpel8_mc33_daedalus;
+ 
+         c->avg_h264_qpel_pixels_tab[0][ 0] = ff_avg_h264_qpel16_mc00_neon;
+         c->avg_h264_qpel_pixels_tab[0][ 1] = ff_avg_h264_qpel16_mc10_neon;
+@@ -198,21 +256,21 @@
+         c->avg_h264_qpel_pixels_tab[0][15] = ff_avg_h264_qpel16_mc33_neon;
+ 
+         c->avg_h264_qpel_pixels_tab[1][ 0] = ff_avg_h264_qpel8_mc00_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 1] = ff_avg_h264_qpel8_mc10_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 2] = ff_avg_h264_qpel8_mc20_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 3] = ff_avg_h264_qpel8_mc30_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 4] = ff_avg_h264_qpel8_mc01_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 5] = ff_avg_h264_qpel8_mc11_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 6] = ff_avg_h264_qpel8_mc21_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 7] = ff_avg_h264_qpel8_mc31_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 8] = ff_avg_h264_qpel8_mc02_neon;
+-        c->avg_h264_qpel_pixels_tab[1][ 9] = ff_avg_h264_qpel8_mc12_neon;
+-        c->avg_h264_qpel_pixels_tab[1][10] = ff_avg_h264_qpel8_mc22_neon;
+-        c->avg_h264_qpel_pixels_tab[1][11] = ff_avg_h264_qpel8_mc32_neon;
+-        c->avg_h264_qpel_pixels_tab[1][12] = ff_avg_h264_qpel8_mc03_neon;
+-        c->avg_h264_qpel_pixels_tab[1][13] = ff_avg_h264_qpel8_mc13_neon;
+-        c->avg_h264_qpel_pixels_tab[1][14] = ff_avg_h264_qpel8_mc23_neon;
+-        c->avg_h264_qpel_pixels_tab[1][15] = ff_avg_h264_qpel8_mc33_neon;
++        c->avg_h264_qpel_pixels_tab[1][ 1] = ff_avg_h264_qpel8_mc10_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 2] = ff_avg_h264_qpel8_mc20_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 3] = ff_avg_h264_qpel8_mc30_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 4] = ff_avg_h264_qpel8_mc01_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 5] = ff_avg_h264_qpel8_mc11_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 6] = ff_avg_h264_qpel8_mc21_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 7] = ff_avg_h264_qpel8_mc31_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 8] = ff_avg_h264_qpel8_mc02_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][ 9] = ff_avg_h264_qpel8_mc12_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][10] = ff_avg_h264_qpel8_mc22_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][11] = ff_avg_h264_qpel8_mc32_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][12] = ff_avg_h264_qpel8_mc03_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][13] = ff_avg_h264_qpel8_mc13_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][14] = ff_avg_h264_qpel8_mc23_daedalus;
++        c->avg_h264_qpel_pixels_tab[1][15] = ff_avg_h264_qpel8_mc33_daedalus;
+     } else if (have_neon(cpu_flags) && bit_depth == 10) {
+         c->put_h264_qpel_pixels_tab[0][ 1] = ff_put_h264_qpel16_mc10_neon_10;
+         c->put_h264_qpel_pixels_tab[0][ 2] = ff_put_h264_qpel16_mc20_neon_10;
+--
+2.47.3
+

debian/ffmpeg-v4l2-request-fourier/0013-h264-deblock-chroma-intra-daedalus-fourier.patch

@@ -0,0 +1,120 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: claude-noether <claude-noether@noreply.localhost>
+Date: Sun, 25 May 2026 14:30:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264dsp: route H.264 chroma intra deblock (4:2:0) through daedalus-fourier
+
+Substitutes c->v_loop_filter_chroma_intra and c->h_loop_filter_chroma_intra
+with daedalus wrappers in the bit_depth=8 / chroma_format_idc<=1 (4:2:0)
+branch.  4:2:2 stays on the in-tree NEON path (the daedalus chroma intra
+dispatch is 4:2:0-only).
+
+The fourier dispatches were exposed in PR #11 (DEFINE_INTRA_DISPATCH
+macro generates the public daedalus_dispatch_h264_deblock_chroma_*_intra
+symbols + recipe wrappers).
+
+Re-architects the chroma init: v_loop_filter_chroma_intra was previously
+assigned unconditionally to the NEON variant (which works for both 4:2:0
+and 4:2:2).  We now assign it INSIDE both branches of the chroma_format_idc
+conditional, with the 4:2:0 branch picking daedalus and the 4:2:2 branch
+keeping NEON.  No regression for 4:2:2 streams.
+
+Same NEON-to-NEON via recipe shape as 0010 luma intra.
+
+Refs reauktion/daedalus-v4l2#11 — substitution arc chroma intra.
+---
+diff --git a/libavcodec/aarch64/h264_idct_daedalus.c b/libavcodec/aarch64/h264_idct_daedalus.c
+--- a/libavcodec/aarch64/h264_idct_daedalus.c	2026-05-25 14:21:08.267156263 +0200
++++ libavcodec/aarch64/h264_idct_daedalus.c	2026-05-25 14:21:08.287745931 +0200
+@@ -1,5 +1,5 @@
+ /*
+- * H.264 4x4 / 8x8 IDCT + luma v/h (inter+intra) + chroma v/h deblock + chroma DC Hadamard — daedalus-fourier substitution shims.
++ * H.264 4x4 / 8x8 IDCT + luma v/h (inter+intra) + chroma v/h (inter+intra) deblock + chroma DC Hadamard — daedalus-fourier substitution shims.
+  *
+  * Routes H264DSPContext.idct_add           → daedalus_recipe_dispatch_h264_idct4
+  *        H264DSPContext.idct8_add          → daedalus_recipe_dispatch_h264_idct8
+@@ -9,6 +9,8 @@
+  *        H264DSPContext.h_loop_filter_chroma → daedalus_recipe_dispatch_h264_deblock_chroma_h
+  *        H264DSPContext.v_loop_filter_luma_intra → daedalus_recipe_dispatch_h264_deblock_luma_v_intra
+  *        H264DSPContext.h_loop_filter_luma_intra → daedalus_recipe_dispatch_h264_deblock_luma_h_intra
++ *        H264DSPContext.v_loop_filter_chroma_intra → daedalus_recipe_dispatch_h264_deblock_chroma_v_intra
++ *        H264DSPContext.h_loop_filter_chroma_intra → daedalus_recipe_dispatch_h264_deblock_chroma_h_intra
+  *        H264DSPContext.chroma_dc_dequant_idct   → daedalus_h264_chroma_dc_hadamard_2x2 + caller-side qmul
+  * instead of the in-tree ff_h264_*_neon assembly.  The recipe layer
+  * picks the substrate (CPU NEON for cycles 6 + 7 by default; cycle 8
+@@ -61,6 +63,10 @@
+                                                 int alpha, int beta);
+ void ff_h264_h_loop_filter_luma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
+                                                 int alpha, int beta);
++void ff_h264_v_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta);
++void ff_h264_h_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta);
+ void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul);
+ 
+ void ff_h264_idct_add_daedalus(uint8_t *dst, int16_t *block, int stride)
+@@ -218,3 +224,30 @@
+     block[stride*1 + xStride*0] = (int16_t)((int)dc[2] * qmul >> 7);
+     block[stride*1 + xStride*1] = (int16_t)((int)dc[3] * qmul >> 7);
+ }
++
++void ff_h264_v_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta)
++{
++    daedalus_h264_deblock_meta meta = {
++        .dst_off = 0,
++        .alpha   = alpha,
++        .beta    = beta,
++    };
++    /* tc0[] unused for intra (bS=4 hardcodes the strength). */
++    pthread_once(&g_dctx_once, daedalus_ctx_init_once);
++    daedalus_recipe_dispatch_h264_deblock_chroma_v_intra(g_dctx, pix, (size_t)stride,
++                                                          1, &meta);
++}
++
++void ff_h264_h_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta)
++{
++    daedalus_h264_deblock_meta meta = {
++        .dst_off = 0,
++        .alpha   = alpha,
++        .beta    = beta,
++    };
++    pthread_once(&g_dctx_once, daedalus_ctx_init_once);
++    daedalus_recipe_dispatch_h264_deblock_chroma_h_intra(g_dctx, pix, (size_t)stride,
++                                                          1, &meta);
++}
+diff --git a/libavcodec/aarch64/h264dsp_init_aarch64.c b/libavcodec/aarch64/h264dsp_init_aarch64.c
+--- a/libavcodec/aarch64/h264dsp_init_aarch64.c	2026-05-25 14:21:08.268311057 +0200
++++ libavcodec/aarch64/h264dsp_init_aarch64.c	2026-05-25 14:21:08.287886563 +0200
+@@ -42,6 +42,10 @@
+ void ff_h264_h_loop_filter_luma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
+                                                 int alpha, int beta);
+ void ff_h264_chroma_dc_dequant_idct_daedalus(int16_t *block, int qmul);
++void ff_h264_v_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta);
++void ff_h264_h_loop_filter_chroma_intra_daedalus(uint8_t *pix, ptrdiff_t stride,
++                                                 int alpha, int beta);
+ void ff_h264_v_loop_filter_chroma_neon(uint8_t *pix, ptrdiff_t stride, int alpha,
+                                        int beta, int8_t *tc0);
+ void ff_h264_v_loop_filter_chroma_daedalus(uint8_t *pix, ptrdiff_t stride,
+@@ -133,14 +137,15 @@
+         c->h_loop_filter_luma_intra= ff_h264_h_loop_filter_luma_intra_daedalus;
+ 
+         c->v_loop_filter_chroma = ff_h264_v_loop_filter_chroma_daedalus;
+-        c->v_loop_filter_chroma_intra = ff_h264_v_loop_filter_chroma_intra_neon;
+ 
+         if (chroma_format_idc <= 1) {
+             c->chroma_dc_dequant_idct = ff_h264_chroma_dc_dequant_idct_daedalus;
++            c->v_loop_filter_chroma_intra = ff_h264_v_loop_filter_chroma_intra_daedalus;
+             c->h_loop_filter_chroma = ff_h264_h_loop_filter_chroma_daedalus;
+-            c->h_loop_filter_chroma_intra = ff_h264_h_loop_filter_chroma_intra_neon;
++            c->h_loop_filter_chroma_intra = ff_h264_h_loop_filter_chroma_intra_daedalus;
+             c->h_loop_filter_chroma_mbaff_intra = ff_h264_h_loop_filter_chroma_mbaff_intra_neon;
+         } else {
++            c->v_loop_filter_chroma_intra = ff_h264_v_loop_filter_chroma_intra_neon;
+             c->h_loop_filter_chroma = ff_h264_h_loop_filter_chroma422_neon;
+             c->h_loop_filter_chroma_mbaff = ff_h264_h_loop_filter_chroma_neon;
+             c->h_loop_filter_chroma_intra = ff_h264_h_loop_filter_chroma422_intra_neon;
+--
+2.47.3
+

debian/ffmpeg-v4l2-request-fourier/0014-h264-ctx-qpu-capable.patch

@@ -0,0 +1,85 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Markus Fritsche <mfritsche@reauktion.de>
+Date: Mon, 25 May 2026 21:00:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264: use QPU-capable daedalus ctx (bench
+ shows 4.30x faster on Pi 5)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Patches 0003 (IDCT 4x4) and 0007 (qpel mc20) created the libavcodec.so
+process-global daedalus_ctx via daedalus_ctx_create_no_qpu().  Rationale
+at the time: cycle 6/9 had only CPU NEON paths, so a QPU-capable ctx
+would have meant pointless Vulkan init in every host process (firefox-
+fourier, mpv-fourier, daedalus_v4l2_daemon, ...).
+
+Two things changed since:
+
+  1. Every H.264 hot-path primitive now has a V3D7 compute shader.
+     IDCT 4x4/8x8 (cycles 6, 7), 8 deblock variants (luma+chroma x V+H
+     x inter+intra), 30 qpel positions (15 put_ + 15 avg_).  See
+     daedalus-fourier PRs #28-#35.
+
+  2. Dispatch overhead has been hammered down — buffer pool in
+     v3d_runner (daedalus-fourier task #160) plus persistent command
+     buffer (task #161).  daedalus-fourier PR #36 bench measures the
+     1080p worst-case sum on hertz (Pi 5 V3D 7.1, 30 iters x 5 warmup):
+
+       kernel             CPU ns/op  QPU ns/op  winner
+       IDCT 4x4 luma          10.79       2.47  QPU 4.36x
+       IDCT 8x8 luma          29.69       9.23  QPU 3.22x
+       Deblock luma_v         17.58      10.21  QPU 1.72x
+       Deblock luma_h         38.41       9.98  QPU 3.85x
+       qpel mc20 (8x8)        28.24       9.66  QPU 2.92x
+       qpel mc02 (8x8)        16.96      20.54  CPU 1.21x
+       qpel mc22 (8x8)        71.58       9.64  QPU 7.43x
+
+       1080p worst-case sum (IDCT4 + deblock luma + qpel mc22):
+         CPU NEON only:  5.57 ms
+         QPU only:       1.30 ms   (CPU/QPU sum ratio = 4.30x)
+
+PR #10's verdict (CPU 4x faster than QPU at IDCT) is reversed.  Switch
+the substitution context to daedalus_ctx_create() in both H.264 TUs
+(h264_idct_daedalus.c, h264_qpel_daedalus.c) so the recipe layer can
+actually route through the now-faster QPU path.
+
+daedalus_ctx_create() probes for a usable Vulkan device and falls back
+to no_qpu mode if unavailable, so this is safe on hosts without V3D
+(x86 reauktion build runners, debian-aarch64 builders without renderD,
+etc.).  Hosts WITH V3D (Pi 5 deployment targets) get the speedup.
+
+The remaining qpel mc02 anomaly (single-axis vertical filter, 1.21x
+CPU) is bench-flagged for a v2 shader follow-up; the recipe entry
+stays QPU since the policy decree (2026-05-23 substrate decree) holds
+and the gap is marginal.
+
+Refs reauktion/daedalus-fourier!36.
+---
+ libavcodec/aarch64/h264_idct_daedalus.c | 2 +-
+ libavcodec/aarch64/h264_qpel_daedalus.c | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/libavcodec/aarch64/h264_idct_daedalus.c b/libavcodec/aarch64/h264_idct_daedalus.c
+--- a/libavcodec/aarch64/h264_idct_daedalus.c
++++ b/libavcodec/aarch64/h264_idct_daedalus.c
+@@ -32,7 +32,7 @@ static pthread_once_t    g_dctx_once = PTHREAD_ONCE_INIT;
+
+ static void daedalus_ctx_init_once(void)
+ {
+-    g_dctx = daedalus_ctx_create_no_qpu();
++    g_dctx = daedalus_ctx_create();
+ }
+
+ void ff_h264_idct_add_daedalus(uint8_t *dst, int16_t *block, int stride);
+diff --git a/libavcodec/aarch64/h264_qpel_daedalus.c b/libavcodec/aarch64/h264_qpel_daedalus.c
+--- a/libavcodec/aarch64/h264_qpel_daedalus.c
++++ b/libavcodec/aarch64/h264_qpel_daedalus.c
+@@ -38,7 +38,7 @@ static pthread_once_t    g_dctx_once = PTHREAD_ONCE_INIT;
+
+ static void daedalus_ctx_init_once(void)
+ {
+-    g_dctx = daedalus_ctx_create_no_qpu();
++    g_dctx = daedalus_ctx_create();
+ }
+
+ void ff_put_h264_qpel8_mc20_daedalus(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);

debian/ffmpeg-v4l2-request-fourier/0015-h264-ctx-revert-to-no-qpu.patch

@@ -0,0 +1,73 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Markus Fritsche <mfritsche@reauktion.de>
+Date: Mon, 25 May 2026 22:00:00 +0200
+Subject: [PATCH] avcodec/aarch64/h264: revert ctx flip — daedalus-fourier PR
+ #36 was a measurement artifact
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Reverts the daedalus_ctx_create_no_qpu() → daedalus_ctx_create() flip
+that landed in 0014-h264-ctx-qpu-capable.patch (marfrit-packages PR
+#104).  The flip was justified by daedalus-fourier PR #36 which
+reported a 4.30x QPU-over-CPU win on the 1080p H.264 hot-path sum.
+
+That number was a measurement artifact.  The bench tool's
+v3d_runner.read_spv() did a bare fopen() that resolved relative to
+cwd; when run from the source directory (as in PR #36), the SPVs at
+$builddir/v3d_*.spv were not found, every QPU dispatch returned -1
+fast, and the loop timed the failure path.  Daedalus-fourier PR #37
+fixes the SPV search + bench preflight; corrected numbers from hertz
+(Pi 5 V3D 7.1) show QPU is 12-77x SLOWER than CPU NEON at every
+H.264 hot-path kernel:
+
+  kernel             CPU ns/op  QPU ns/op  winner
+  IDCT 4x4 luma          10.75     217.63  CPU 20.24x
+  IDCT 8x8 luma          29.69     785.94  CPU 26.47x
+  Deblock luma_v         17.63     467.42  CPU 26.51x
+  Deblock luma_h         38.30     498.53  CPU 13.02x
+  qpel mc20 (8x8)        30.17    1300.44  CPU 43.10x
+  qpel mc02 (8x8)        17.69    1363.40  CPU 77.08x
+  qpel mc22 (8x8)        71.60    1948.37  CPU 27.21x
+
+  1080p sum: CPU 5.57 ms vs QPU 123.54 ms — QPU 22x slower.
+
+Until the daedalus QPU dispatch overhead is actually competitive (a
+multi-task effort tracked on the daedalus-fourier side), the
+libavcodec.so substitution must stay on daedalus_ctx_create_no_qpu()
+to avoid pessimizing every host process that loads it
+(firefox-fourier RDD, mpv-fourier, daedalus_v4l2_daemon).
+
+Both H.264 TUs (h264_idct_daedalus.c, h264_qpel_daedalus.c) are
+reverted; the change is a 2-line revert of patch 0014.
+
+Refs reauktion/daedalus-fourier!37 (the retraction PR).
+---
+ libavcodec/aarch64/h264_idct_daedalus.c | 2 +-
+ libavcodec/aarch64/h264_qpel_daedalus.c | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/libavcodec/aarch64/h264_idct_daedalus.c b/libavcodec/aarch64/h264_idct_daedalus.c
+--- a/libavcodec/aarch64/h264_idct_daedalus.c
++++ b/libavcodec/aarch64/h264_idct_daedalus.c
+@@ -32,7 +32,7 @@ static pthread_once_t    g_dctx_once = PTHREAD_ONCE_INIT;
+
+ static void daedalus_ctx_init_once(void)
+ {
+-    g_dctx = daedalus_ctx_create();
++    g_dctx = daedalus_ctx_create_no_qpu();
+ }
+
+ void ff_h264_idct_add_daedalus(uint8_t *dst, int16_t *block, int stride);
+diff --git a/libavcodec/aarch64/h264_qpel_daedalus.c b/libavcodec/aarch64/h264_qpel_daedalus.c
+--- a/libavcodec/aarch64/h264_qpel_daedalus.c
++++ b/libavcodec/aarch64/h264_qpel_daedalus.c
+@@ -38,7 +38,7 @@ static pthread_once_t    g_dctx_once = PTHREAD_ONCE_INIT;
+
+ static void daedalus_ctx_init_once(void)
+ {
+-    g_dctx = daedalus_ctx_create();
++    g_dctx = daedalus_ctx_create_no_qpu();
+ }
+
+ void ff_put_h264_qpel8_mc20_daedalus(uint8_t *dst, const uint8_t *src, ptrdiff_t stride);

debian/ffmpeg-v4l2-request-fourier/build-deb.sh

@@ -33,7 +33,7 @@ FFMPEG_VERSION=8.1
 # epoch 2 matches Debian's stock ffmpeg (currently 7:7.1.x in trixie);
 # +rfourier suffix to avoid colliding with upstream/Debian rebuilds.
 PKGVER=2:${FFMPEG_VERSION}+rfourier+gb57fbbe
-PKGREL=10  # pkgrel=10 — H.264 luma qpel mc20 daedalus-fourier substitution
+PKGREL=12  # pkgrel=12 — REVERT pkgrel=11 ctx flip; daedalus-fourier PR #36 4.30x headline was measurement artifact (PR #37 corrects: QPU 22x SLOWER than CPU)
            # (cycle 9 of the daedalus-v4l2#11 step 2 substitution arc; closes
            # the libavcodec.so substitution sequence 6 IDCT4 / 7 IDCT8 /
            # 8 luma-v deblock / 9 qpel mc20).  Pulls daedalus-fourier PR #2
@@ -45,7 +45,7 @@ PKGREL=10  # pkgrel=10 — H.264 luma qpel mc20 daedalus-fourier substitution
 # DAEDALUS_KERNEL_H264_QPEL_MC20.  Cycle 9 plumbs the last H.264 NEON
 # kernel through the recipe layer.  Daemon-side build (debian/daedalus-v4l2)
 # can bump in a follow-up; this PR only changes the libavcodec.so consumer.
-DAEDALUS_FOURIER_COMMIT=209a4218bcb98b91c04f07ad61513bb04adb13ad
+DAEDALUS_FOURIER_COMMIT=b9f9ff2a89c068aea54dcb52b543afddad28311e  # PR #25 — public chroma DC Hadamard
 
 HERE=$(dirname "$(readlink -f "$0")")
 
@@ -77,6 +77,11 @@ patch -Np1 -i "$HERE/0007-h264-qpel-mc20-daedalus-fourier.patch"
 patch -Np1 -i "$HERE/0008-h264-deblock-luma-h-daedalus-fourier.patch"
 patch -Np1 -i "$HERE/0009-h264-deblock-chroma-daedalus-fourier.patch"
 patch -Np1 -i "$HERE/0010-h264-deblock-luma-intra-daedalus-fourier.patch"
+patch -Np1 -i "$HERE/0011-h264-chroma-dc-hadamard-daedalus-fourier.patch"
+patch -Np1 -i "$HERE/0012-h264-qpel-rest-daedalus-fourier.patch"
+patch -Np1 -i "$HERE/0013-h264-deblock-chroma-intra-daedalus-fourier.patch"
+patch -Np1 -i "$HERE/0014-h264-ctx-qpu-capable.patch"
+patch -Np1 -i "$HERE/0015-h264-ctx-revert-to-no-qpu.patch"
 
 # --- daedalus-fourier: fetch + build static .a with PIC, install to a
 # per-build prefix; libavcodec.so links it into the shared object so