RetroDECK/functions/compression.sh

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#!/bin/bash
compress_game() {
# Function for compressing one or more files to .chd format
# USAGE: compress_game $format $full_path_to_input_file
local file="$2"
local filename_no_path=$(basename "$file")
local filename_no_extension="${filename_no_path%.*}"
local source_file=$(dirname "$(realpath "$file")")"/"$(basename "$file")
local dest_file=$(dirname "$(realpath "$file")")"/""$filename_no_extension"
if [[ "$1" == "chd" ]]; then
/app/bin/chdman createcd -i "$source_file" -o "$dest_file".chd
elif [[ "$1" == "zip" ]]; then
zip -jq9 "$dest_file".zip "$source_file"
elif [[ "$1" == "rvz" ]]; then
dolphin-tool convert -f rvz -b 131072 -c zstd -l 5 -i "$source_file" -o "$dest_file.rvz"
fi
}
find_compatible_compression_format() {
# This function will determine what compression format, if any, the file and system are compatible with
# USAGE: find_compatible_compression_format "$file"
local normalized_filename=$(echo "$1" | tr '[:upper:]' '[:lower:]')
local system=$(echo "$1" | grep -oE "$roms_folder/[^/]+" | grep -oE "[^/]+$")
if [[ $(validate_for_chd "$1") == "true" ]] && [[ $(sed -n '/^\[/{h;d};/\b'"$system"'\b/{g;s/\[\(.*\)\]/\1/p;q};' $compression_targets) == "chd" ]]; then
echo "chd"
elif grep -qF ".${normalized_filename##*.}" $zip_compressable_extensions && [[ $(sed -n '/^\[/{h;d};/\b'"$system"'\b/{g;s/\[\(.*\)\]/\1/p;q};' $compression_targets) == "zip" ]]; then
echo "zip"
elif echo "$normalized_filename" | grep -qE '\.iso|\.gcm' && [[ $(sed -n '/^\[/{h;d};/\b'"$system"'\b/{g;s/\[\(.*\)\]/\1/p;q};' $compression_targets) == "rvz" ]]; then
echo "rvz"
else
# If no compatible format can be found for the input file
echo "none"
fi
}
validate_for_chd() {
# Function for validating chd compression candidates, and compresses if validation passes. Supports .cue, .iso and .gdi formats ONLY
# USAGE: validate_for_chd $input_file
local file="$1"
local normalized_filename=$(echo "$file" | tr '[:upper:]' '[:lower:]')
local file_validated="false"
chd_validation_log_file="compression_$(basename "$file").log"
echo "Validating file:" "$file" > "$logs_folder/$chd_validation_log_file"
if echo "$normalized_filename" | grep -qE '\.iso|\.cue|\.gdi'; then
echo ".cue/.iso/.gdi file detected" >> "$logs_folder/$chd_validation_log_file"
local file_path=$(dirname "$(realpath "$file")")
local file_base_name=$(basename "$file")
local file_name=${file_base_name%.*}
if [[ "$normalized_filename" == *".cue" ]]; then # Validate .cue file
if [[ ! "$file_path" == *"dreamcast"* ]]; then # .bin/.cue compression may not work for Dreamcast, only GDI or ISO # TODO: verify
echo "Validating .cue associated .bin files" >> "$logs_folder/$chd_validation_log_file"
local cue_bin_files=$(grep -o -P "(?<=FILE \").*(?=\".*$)" "$file")
echo "Associated bin files read:" >> "$logs_folder/$chd_validation_log_file"
printf '%s\n' "$cue_bin_files" >> "$logs_folder/$chd_validation_log_file"
if [[ ! -z "$cue_bin_files" ]]; then
while IFS= read -r line
do
echo "looking for $file_path/$line" >> "$logs_folder/$chd_validation_log_file"
if [[ -f "$file_path/$line" ]]; then
echo ".bin file found at $file_path/$line" >> "$logs_folder/$chd_validation_log_file"
file_validated="true"
else
echo ".bin file NOT found at $file_path/$line" >> "$logs_folder/$chd_validation_log_file"
echo ".cue file could not be validated. Please verify your .cue file contains the correct corresponding .bin file information and retry." >> "$logs_folder/$chd_validation_log_file"
file_validated="false"
break
fi
done < <(printf '%s\n' "$cue_bin_files")
fi
else
echo ".cue files not compatible with Dreamcast CHD compression" >> "$logs_folder/$chd_validation_log_file"
fi
echo $file_validated
else # If file is a .iso or .gdi
file_validated="true"
echo $file_validated
fi
else
echo "File type not recognized. Supported file types are .cue, .gdi and .iso" >> "$logs_folder/$chd_validation_log_file"
echo $file_validated
fi
}
cli_compress_single_game() {
# This function will compress a single file passed from the CLI arguments
# USAGE: cli_compress_single_game $full_file_path
local file=$(realpath "$1")
read -p "Do you want to have the original file removed after compression is complete? Please answer y/n and press Enter: " post_compression_cleanup
read -p "RetroDECK will now attempt to compress your selected game. Press Enter key to continue..."
if [[ ! -z "$file" ]]; then
if [[ -f "$file" ]]; then
check_system=$(echo "$file" | grep -oE "$roms_folder/[^/]+" | grep -oE "[^/]+$")
local compatible_compression_format=$(find_compatible_compression_format "$file")
if [[ ! $compatible_compression_format == "none" ]]; then
echo "$(basename "$file") can be compressed to $compatible_compression_format"
compress_game "$compatible_compression_format" "$file"
if [[ $post_compression_cleanup == [yY] ]]; then # Remove file(s) if requested
if [[ $(basename "$file") == *".cue" ]]; then
local cue_bin_files=$(grep -o -P "(?<=FILE \").*(?=\".*$)" "$file")
local file_path=$(dirname "$(realpath "$file")")
while IFS= read -r line
do # Remove associated .bin files
echo "Removing original file "$file_path/$line""
rm -f "$file_path/$line"
done < <(printf '%s\n' "$cue_bin_files") # Remove original .cue file
echo "Removing original file $(basename "$file")"
rm -f "$file"
else
echo "Removing original file $(basename "$file")"
rm -f "$file"
fi
fi
else
echo "$(basename "$file") does not have any compatible compression formats."
fi
else
echo "File not found, please specify the full path to the file to be compressed."
fi
else
echo "Please use this command format \"--compress-one <path to file to compress>\""
fi
}
cli_compress_all_games() {
if echo "$1" | grep -qE 'chd|rvz|zip'; then
local compression_format="$1"
elif [[ "$1" == "all" ]]; then
local compression_format="all"
else
echo "Please enter a supported compression format. Options are \"chd\", \"rvz\", \"zip\" or \"all\""
exit 1
fi
local compressable_game=""
local all_compressable_games=()
if [[ $compression_format == "all" ]]; then
local compressable_systems_list=$(cat $compression_targets | sed '/^$/d' | sed '/^\[/d')
else
local compressable_systems_list=$(sed -n '/\['"$compression_format"'\]/, /\[/{ /\['"$compression_format"'\]/! { /\[/! p } }' $compression_targets | sed '/^$/d')
fi
read -p "Do you want to have the original files removed after compression is complete? Please answer y/n and press Enter: " post_compression_cleanup
read -p "RetroDECK will now attempt to compress all compatible games. Press Enter key to continue..."
while IFS= read -r system # Find and validate all games that are able to be compressed with this compression type
do
local compression_candidates=$(find "$roms_folder/$system" -type f -not -iname "*.txt")
if [[ ! -z "$compression_candidates" ]]; then
echo "Checking files for $system"
while IFS= read -r file
do
local compatible_compression_format=$(find_compatible_compression_format "$file")
if [[ ! "$compatible_compression_format" == "none" ]]; then
echo "$(basename "$file") can be compressed to $compatible_compression_format"
compress_game "$compatible_compression_format" "$file"
if [[ $post_compression_cleanup == [yY] ]]; then # Remove file(s) if requested
if [[ "$file" == *".cue" ]]; then
local cue_bin_files=$(grep -o -P "(?<=FILE \").*(?=\".*$)" "$file")
local file_path=$(dirname "$(realpath "$file")")
while IFS= read -r line
do # Remove associated .bin files
echo "Removing original file "$file_path/$line""
rm -f "$file_path/$line"
done < <(printf '%s\n' "$cue_bin_files") # Remove original .cue file
echo "Removing original file "$file""
rm -f $(realpath "$file")
else
echo "Removing original file "$file""
rm -f $(realpath "$file")
fi
fi
else
echo "No compatible compression format found for $(basename "$file")"
fi
done < <(printf '%s\n' "$compression_candidates")
else
echo "No compatible files found for compression in $system"
fi
done < <(printf '%s\n' "$compressable_systems_list")
}