From 7592ada7c366da997703925eb7eebf9a35049c65 Mon Sep 17 00:00:00 2001
From: ndonkoHenri <robotcoder4@protonmail.com>
Date: Mon, 6 Jul 2026 22:38:17 +0200
Subject: [PATCH 1/2] recipe: pywavelets 1.9.0

PyWavelets for iOS and Android (flet-dev/flet#6649, unblocks neurokit2
which is pure-Python and installs from PyPI once this wheel exists).

Minimal meson-python + Cython recipe (contourpy/pandas archetype): the
sdist vendors all native code (plain C, no C++/OpenMP/BLAS), so no
flet-lib* deps and zero patches. numpy resolved through the meson cross
file's host-runnable python.

Tested locally on Python 3.12:
- full 6/6 build matrix green (3 iOS slices + 3 Android ABIs)
- on-device recipe-tester 4/4 passed on iOS Simulator (arm64) and
  Android emulator (arm64-v8a): dwt/idwt round-trip, multilevel
  wavedec/waverec, swt/iswt, cwt with a complex Morlet wavelet.
---
 recipes/pywavelets/meta.yaml                | 17 ++++++++
 recipes/pywavelets/tests/test_pywavelets.py | 47 +++++++++++++++++++++
 2 files changed, 64 insertions(+)
 create mode 100644 recipes/pywavelets/meta.yaml
 create mode 100644 recipes/pywavelets/tests/test_pywavelets.py

diff --git a/recipes/pywavelets/meta.yaml b/recipes/pywavelets/meta.yaml
new file mode 100644
index 0000000..5216e01
--- /dev/null
+++ b/recipes/pywavelets/meta.yaml
@@ -0,0 +1,17 @@
+package:
+  name: pywavelets
+  version: "1.9.0"
+
+requirements:
+  build:
+    - ninja
+    - meson
+    - cython
+  host:
+    - numpy ^2.0.0
+
+build:
+  number: 1
+  backend-args:
+    - -Csetup-args=--cross-file
+    - -Csetup-args={MESON_CROSS_FILE}
diff --git a/recipes/pywavelets/tests/test_pywavelets.py b/recipes/pywavelets/tests/test_pywavelets.py
new file mode 100644
index 0000000..69c9521
--- /dev/null
+++ b/recipes/pywavelets/tests/test_pywavelets.py
@@ -0,0 +1,47 @@
+import numpy as np
+
+
+def test_dwt_roundtrip():
+    """dwt/idwt round-trip -> exercises the _dwt extension + c_wt convolution."""
+    import pywt
+
+    x = np.linspace(0.0, 1.0, 64)
+    ca, cd = pywt.dwt(x, "db2")
+    y = pywt.idwt(ca, cd, "db2")
+    assert np.allclose(x, y[: len(x)])
+
+
+def test_wavedec_multilevel():
+    """wavedec/waverec multilevel -> exercises the _pywt wavelet objects."""
+    import pywt
+
+    x = np.sin(np.linspace(0.0, 8.0 * np.pi, 128))
+    coeffs = pywt.wavedec(x, "haar", level=3)
+    assert len(coeffs) == 4
+    y = pywt.waverec(coeffs, "haar")
+    assert np.allclose(x, y[: len(x)])
+
+
+def test_swt():
+    """Stationary wavelet transform -> exercises the _swt extension."""
+    import pywt
+
+    x = np.arange(32, dtype=np.float64)
+    coeffs = pywt.swt(x, "db1", level=2)
+    assert len(coeffs) == 2
+    y = pywt.iswt(coeffs, "db1")
+    assert np.allclose(x, y)
+
+
+def test_cwt_complex_wavelet():
+    """cwt with a complex Morlet -> exercises the _cwt extension and the
+    C99 complex code paths in the vendored C library."""
+    import pywt
+
+    t = np.linspace(0.0, 1.0, 200)
+    x = np.sin(40.0 * np.pi * t)
+    coefs, freqs = pywt.cwt(x, np.arange(1, 16), "cmor1.5-1.0")
+    assert coefs.shape == (15, 200)
+    assert np.iscomplexobj(coefs)
+    assert np.isfinite(coefs).all()
+    assert len(freqs) == 15

From 65d10da9a6a40cd527e8129007ab1fdb15a2ba26 Mon Sep 17 00:00:00 2001
From: ndonkoHenri <robotcoder4@protonmail.com>
Date: Mon, 6 Jul 2026 22:41:45 +0200
Subject: [PATCH 2/2] update

---
 recipes/pywavelets/meta.yaml | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/recipes/pywavelets/meta.yaml b/recipes/pywavelets/meta.yaml
index 5216e01..2f5533f 100644
--- a/recipes/pywavelets/meta.yaml
+++ b/recipes/pywavelets/meta.yaml
@@ -2,6 +2,12 @@ package:
   name: pywavelets
   version: "1.9.0"
 
+build:
+  number: 1
+  backend-args:
+    - -Csetup-args=--cross-file
+    - -Csetup-args={MESON_CROSS_FILE}
+
 requirements:
   build:
     - ninja
@@ -9,9 +15,3 @@ requirements:
     - cython
   host:
     - numpy ^2.0.0
-
-build:
-  number: 1
-  backend-args:
-    - -Csetup-args=--cross-file
-    - -Csetup-args={MESON_CROSS_FILE}