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csdk: 撤回第29轮'关 pivot'的取值（依据已被真机反汇编推翻），C 参考保持 PC 语义；README 记录 Android 版 LUT 与 fpaTempFix 的待移植规格

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This commit is contained in:
ZXCLI
2026-10-06 07:57:01 +08:00
parent 6392bd89ee
commit bf03e852ca
3 changed files with 24 additions and 16 deletions
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csdk/tools/mag160c_demo3.c
+7 -5
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@@ -605,11 +605,13 @@ int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmd, int show) {
cfg.ffc_drift = 250;
cfg.startup_force_ffc = 1;
cfg.warm_frames = 20;
/* Official PHONE app runs the gray CDF WITHOUT the 75% pivot: with it on the
rendering is measurably darker than the official app (gray median 33 vs 61,
mean 60 vs 82 in a same-moment on-device comparison); off matches (50-54 vs 61,
80-81 vs 82). See docs/android_app/rendering_diff_phone_20261006.md. */
cfg.cdf_pivot_75 = 0;
/* Keep the PC/Linux reference LUT: this toggle is the PC variant's 75% pivot.
The round-29 change to 0 was based on a mis-derived pivot in the Android build
and is retracted - the official PHONE app has the pivot ON, and its LUT is a
structurally different function (fixed base, step cap, mean-of-partials pivot)
that is ported in the Android pipeline, not here. See
docs/android_app/rendering_diff_phone_20261006.md section 10. */
cfg.cdf_pivot_75 = 1;
cfg.ffc_cb = ffc_cb;
cfg.post_nuc_cb = post_nuc_cb;
cfg.post_gray_cb = post_gray_cb;
csdk/tools/mag160c_linux_demo.c
+3 -5
View File
@@ -125,11 +125,9 @@ int main(int argc, char **argv) {
cfg.ffc_drift = 250;
cfg.startup_force_ffc = 1;
cfg.warm_frames = 20;
/* Official PHONE app runs the gray CDF WITHOUT the 75% pivot: with it on the
rendering is measurably darker than the official app (gray median 33 vs 61,
mean 60 vs 82 in a same-moment on-device comparison); off matches (50-54 vs 61,
80-81 vs 82). See docs/android_app/rendering_diff_phone_20261006.md. */
cfg.cdf_pivot_75 = 0;
/* PC/Linux reference LUT keeps its own pivot (see the same note in
mag160c_demo3.c); the Android-parity LUT lives in the Android pipeline. */
cfg.cdf_pivot_75 = 1;
cfg.ffc_cb = ffc_cb;
mag160c_render_t *render = NULL;
if (mag160c_render_init(&render, &cfg) != MAG160C_OK) {