From 6d41f29b223c51ebca4713028a075ebf2ce44d5e Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Mon, 2 Feb 2026 12:33:34 +0100
Subject: feat(build): Add check_all script and optimize spectool

- Task #4b: Added scripts/check_all.sh to build and test all platform targets (native and Windows cross-compile) to ensure pre-commit stability.
- Task #10: Modified spectool to trim both leading and trailing silent frames from generated .spec files, reducing asset size.
---
 tools/spectool.cc | 47 ++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 38 insertions(+), 9 deletions(-)

(limited to 'tools/spectool.cc')

diff --git a/tools/spectool.cc b/tools/spectool.cc
index 3188424..a9bf551 100644
--- a/tools/spectool.cc
+++ b/tools/spectool.cc
@@ -71,23 +71,52 @@ int analyze_audio(const char* in_path, const char* out_path) {
 
   ma_decoder_uninit(&decoder);
 
-  // Trim trailing zero frames
-  int last_frame = spec_data.size() / DCT_SIZE;
-  while (last_frame > 0) {
+  // --- Trim Silent Frames ---
+  const float epsilon = 1e-6f;
+  int num_frames = spec_data.size() / DCT_SIZE;
+  int first_frame = 0;
+  int last_frame = num_frames;
+
+  // Trim leading silent frames
+  for (int i = 0; i < num_frames; ++i) {
     bool all_zeros = true;
-    for (int i = 0; i < DCT_SIZE; ++i) {
-      if (spec_data[(last_frame - 1) * DCT_SIZE + i] != 0.0f) {
+    for (int j = 0; j < DCT_SIZE; ++j) {
+      if (fabsf(spec_data[i * DCT_SIZE + j]) > epsilon) {
         all_zeros = false;
         break;
       }
     }
     if (all_zeros) {
-      --last_frame;
+      first_frame = i + 1;
     } else {
       break;
     }
   }
-  spec_data.resize(last_frame * DCT_SIZE);
+
+  // Trim trailing silent frames
+  for (int i = num_frames - 1; i >= first_frame; --i) {
+    bool all_zeros = true;
+    for (int j = 0; j < DCT_SIZE; ++j) {
+        if (fabsf(spec_data[i * DCT_SIZE + j]) > epsilon) {
+            all_zeros = false;
+            break;
+        }
+    }
+    if (all_zeros) {
+        last_frame = i;
+    } else {
+        break;
+    }
+  }
+
+  // Create a new vector with the trimmed data
+  std::vector<float> trimmed_data;
+  if (first_frame < last_frame) {
+      trimmed_data.assign(spec_data.begin() + first_frame * DCT_SIZE, 
+                          spec_data.begin() + last_frame * DCT_SIZE);
+  }
+
+  printf("Trimming: Original frames: %d -> Trimmed frames: %zu\n", num_frames, trimmed_data.size() / DCT_SIZE);
 
   // Write to .spec file
   FILE* f_out = fopen(out_path, "wb");
@@ -100,10 +129,10 @@ int analyze_audio(const char* in_path, const char* out_path) {
   memcpy(header.magic, "SPEC", 4);
   header.version = 1;
   header.dct_size = DCT_SIZE;
-  header.num_frames = spec_data.size() / DCT_SIZE;
+  header.num_frames = trimmed_data.size() / DCT_SIZE;
 
   fwrite(&header, sizeof(SpecHeader), 1, f_out);
-  fwrite(spec_data.data(), sizeof(float), spec_data.size(), f_out);
+  fwrite(trimmed_data.data(), sizeof(float), trimmed_data.size(), f_out);
   fclose(f_out);
 
   printf("Analysis complete. Wrote %d spectral frames.\n", header.num_frames);
-- 
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