revert(preset): return ffargs via nameref instead of global variable

Reverts commit b10b81fefbe529be7db14ca65ec4b4a293782d39.

The nameref approach did not work as intended; reverting to restore
correct behaviour.

1 files changed, 3 insertions, 15 deletions

diff --git a/transcode.sh b/transcode.sh
index 527c15c..a5a91d8 100755
--- a/transcode.sh
+++ b/transcode.sh
@@ -347,10 +347,6 @@ fi
 
 # Load ffmpeg argument preset by name.
 #
-# Arguments:
-#   $1 - preset name
-#   $2 - name of the caller's array variable to populate (nameref)
-#
 # Security:
 #   Presets are sourced as shell code. Names are validated against a strict
 #   allowlist (alphanumerics, hyphens, underscores only) to prevent path
@@ -362,12 +358,8 @@ fi
 #   The sourced preset MUST set the bash array `ffargs`.
 #   Presets may reference variables from the caller (encode_one) such as:
 #     output_pixel_format, input_pixel_format, input_codec
-#   On return the caller's array (named by $2) is populated with the preset's
-#   ffargs; the preset-local `ffargs` variable is unset before returning.
 load_preset() {
   local preset="$1"
-  local -n _load_preset_out="$2"
-
   # Strict allowlist: only alphanumerics, hyphens, and underscores are permitted.
   # This prevents path traversal, shell metacharacter injection, and symlink-based
   # attacks more reliably than a blocklist approach.
@@ -397,7 +389,8 @@ load_preset() {
     exit $EXIT_CONFIG_ERROR
   fi
 
-  local ffargs=()
+  unset -v ffargs
+  ffargs=()
 
   debug "Sourcing preset file:" "$file"
 
@@ -410,8 +403,6 @@ load_preset() {
   }
 
   debug "Preset ffargs:" "$(printf "%q " "${ffargs[@]}")"
-
-  _load_preset_out=("${ffargs[@]}")
 }
 
 if [[ $# -eq 0 ]]; then
@@ -705,10 +696,7 @@ encode_one() {
   output_pixel_format="yuv${subsampling}${depth}"
   debug "Selected output pixel format:" "$output_pixel_format"
 
-  # Load preset early so a missing/invalid preset fails before we create a
-  # temp file or do any further work.
-  local ffargs=()
-  load_preset "$PRESET_NAME" ffargs
+  load_preset "$PRESET_NAME"
 
   local extension directory tmp base stem
   # filename (path without extension) is used only for the savings log.