From: Steven Baltakatei Sandoval <baltakatei@gmail.com>
Date: Wed, 12 Jul 2023 03:38:46 +0000 (+0000)
Subject: feat(user/bkmpv2):Add bkshuf wrapper for mpv
X-Git-Url: https://zdv2.bktei.com/gitweb/BK-2020-03.git/commitdiff_plain/75e9293975f0308899d964e9b266280c636e101b

feat(user/bkmpv2):Add bkshuf wrapper for mpv

- chore(user/bkfeh):Fix comment typo
---

diff --git a/user/bkfeh b/user/bkfeh
index 911d51b..fba697c 100755
--- a/user/bkfeh
+++ b/user/bkfeh
@@ -383,7 +383,7 @@ main() {
     fi;
     ## Call find_filelist() in parallel for stdin input
     if [[ "${#dirs_stdin[@]}" -gt 0 ]]; then
-        fdepth=1; export fdepth; # 1 ofr dirs from stdin
+        fdepth=1; export fdepth; # 1 for dirs from stdin
         paths_images+=("$( parallel find_flist {} "$fdepth" "$firegex" "$fsize" ::: "${dirs_stdin[@]}" )"); # See [1]
     fi;
     
@@ -422,5 +422,6 @@ export -f yell die must read_stdin read_psarg find_flist;
 
 main "$@";
 
+
 # Author: Steven Baltakatei Sandoval
 # License: GPLv3+
diff --git a/user/bkmpv2 b/user/bkmpv2
new file mode 100755
index 0000000..19f605e
--- /dev/null
+++ b/user/bkmpv2
@@ -0,0 +1,395 @@
+#!/usr/bin/env bash
+# Desc: Wrapper for mpv that accepts directory paths via posargs or stdin lines
+# Usage: bkmpv2 [DIR]
+# Version: 0.0.1
+# Depends: GNU Parallel, GNU Bash v5.1.16, mpv v0.34.1, bc v1.07.1
+# Ref/Attrib: [1] Tange, Ole. GNU Parallel with Bash Array. 2019-03-24. https://unix.stackexchange.com/a/508365/411854
+# Example: find $HOME/Music -type d | bkmpv2
+# Example: bkmpv2 $HOME/Music/
+# Note: Does not follow symlinks
+
+# Find settings
+firegex=".+\(aac\|aif\|aiff\|flac\|m4a\|mp3\|mp4\|ogg\|opus\|wav\)$"; # update according to `find . -type f | grep -Eo "\.([[:alnum:]])+$" | sort -u`
+fsize="10k"; # default: minimum "10k"
+fdepth_posarg="10"; # find depth for positional arguments
+fdepth_stdin="1";  # find depth for stdin
+fc_falloff="1000"; # characteristic file count falloff in the output
+fc_redbase="10"; # logarithm base to reduce output file count
+
+export firegex fsize ; # export for parallel
+
+#===Declare local functions===
+yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
+die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
+must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
+checkapp() {
+    # Desc: If arg is a command, save result in assoc array 'appRollCall'
+    # Usage: checkapp arg1 arg2 arg3 ...
+    # Version: 0.1.1
+    # Input: global assoc. array 'appRollCall'
+    # Output: adds/updates key(value) to global assoc array 'appRollCall'
+    # Depends: bash 5.0.3
+    local returnState    
+
+    #===Process Args===
+    for arg in "$@"; do
+	if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command
+	    appRollCall[$arg]="true";
+	    if ! [ "$returnState" = "false" ]; then returnState="true"; fi;
+	else
+	    appRollCall[$arg]="false"; returnState="false";
+	fi;
+    done;
+
+    #===Determine function return code===
+    if [ "$returnState" = "true" ]; then
+	return 0;
+    else
+	return 1;
+    fi;
+} # Check that app exists
+checkfile() {
+    # Desc: If arg is a file path, save result in assoc array 'fileRollCall'
+    # Usage: checkfile arg1 arg2 arg3 ...
+    # Version: 0.1.1
+    # Input: global assoc. array 'fileRollCall'
+    # Output: adds/updates key(value) to global assoc array 'fileRollCall';
+    # Output: returns 0 if app found, 1 otherwise
+    # Depends: bash 5.0.3
+    local returnState
+
+    #===Process Args===
+    for arg in "$@"; do
+	if [ -f "$arg" ]; then
+	    fileRollCall["$arg"]="true";
+	    if ! [ "$returnState" = "false" ]; then returnState="true"; fi;
+	else
+	    fileRollCall["$arg"]="false"; returnState="false";
+	fi;
+    done;
+    
+    #===Determine function return code===
+    if [ "$returnState" = "true" ]; then
+	return 0;
+    else
+	return 1;
+    fi;
+} # Check that file exists
+checkdir() {
+    # Desc: If arg is a dir path, save result in assoc array 'dirRollCall'
+    # Usage: checkdir arg1 arg2 arg3 ...
+    # Version 0.1.1
+    # Input: global assoc. array 'dirRollCall'
+    # Output: adds/updates key(value) to global assoc array 'dirRollCall';
+    # Output: returns 0 if app found, 1 otherwise
+    # Depends: Bash 5.0.3
+    local returnState
+
+    #===Process Args===
+    for arg in "$@"; do
+	if [ -d "$arg" ]; then
+	    dirRollCall["$arg"]="true";
+	    if ! [ "$returnState" = "false" ]; then returnState="true"; fi
+	else
+	    dirRollCall["$arg"]="false"; returnState="false";
+	fi
+    done
+    
+    #===Determine function return code===
+    if [ "$returnState" = "true" ]; then
+	return 0;
+    else
+	return 1;
+    fi
+} # Check that dir exists
+displayMissing() {
+    # Desc: Displays missing apps, files, and dirs
+    # Usage: displayMissing
+    # Version 0.1.1
+    # Input: associative arrays: appRollCall, fileRollCall, dirRollCall
+    # Output: stderr: messages indicating missing apps, file, or dirs
+    # Depends: bash 5, checkAppFileDir()
+    local missingApps value appMissing missingFiles fileMissing
+    local missingDirs dirMissing
+    
+    #==BEGIN Display errors==
+    #===BEGIN Display Missing Apps===
+    missingApps="Missing apps  :";
+    #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
+    for key in "${!appRollCall[@]}"; do
+	value="${appRollCall[$key]}";
+	if [ "$value" = "false" ]; then
+	    #echo "DEBUG:Missing apps: $key => $value";
+	    missingApps="$missingApps""$key ";
+	    appMissing="true";
+	fi;
+    done;
+    if [ "$appMissing" = "true" ]; then  # Only indicate if an app is missing.
+	echo "$missingApps" 1>&2;
+    fi;
+    unset value;
+    #===END Display Missing Apps===
+
+    #===BEGIN Display Missing Files===
+    missingFiles="Missing files:";
+    #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done
+    for key in "${!fileRollCall[@]}"; do
+	value="${fileRollCall[$key]}";
+	if [ "$value" = "false" ]; then
+	    #echo "DEBUG:Missing files: $key => $value";
+	    missingFiles="$missingFiles""$key ";
+	    fileMissing="true";
+	fi;
+    done;
+    if [ "$fileMissing" = "true" ]; then  # Only indicate if an app is missing.
+	echo "$missingFiles" 1>&2;
+    fi;
+    unset value;
+    #===END Display Missing Files===
+
+    #===BEGIN Display Missing Directories===
+    missingDirs="Missing dirs:";
+    #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done
+    for key in "${!dirRollCall[@]}"; do
+	value="${dirRollCall[$key]}";
+	if [ "$value" = "false" ]; then
+	    #echo "DEBUG:Missing dirs: $key => $value";
+	    missingDirs="$missingDirs""$key ";
+	    dirMissing="true";
+	fi;
+    done;
+    if [ "$dirMissing" = "true" ]; then  # Only indicate if an dir is missing.
+	echo "$missingDirs" 1>&2;
+    fi;
+    unset value;
+    #===END Display Missing Directories===
+
+    #==END Display errors==
+} # Display missing apps, files, dirs
+check_depends() {
+    if ! checkapp mpv parallel bkshuf bc b2sum; then
+        displayMissing;
+        die "FATAL:Missing apps.";
+    fi;
+    return 1;
+}; # check dependencies
+checkInt() {
+    # Desc: Checks if arg is integer
+    # Usage: checkInt arg
+    # Input: arg: integer
+    # Output: - return code 0 (if arg is integer)
+    #         - return code 1 (if arg is not integer)
+    # Example: if ! checkInt $arg; then echo "not int"; fi;
+    # Version: 0.0.1
+    local returnState
+
+    #===Process Arg===
+    if [[ $# -ne 1 ]]; then
+	die "ERROR:Invalid number of arguments:$#";
+    fi;
+    
+    RETEST1='^[0-9]+$'; # Regular Expression to test
+    if [[ ! $1 =~ $RETEST1 ]] ; then
+	returnState="false";
+    else
+	returnState="true";
+    fi;
+
+    #===Determine function return code===
+    if [ "$returnState" = "true" ]; then
+	return 0;
+    else
+	return 1;
+    fi;
+} # Checks if arg is integer
+read_stdin() {
+    # Desc: Consumes stdin; outputs as stdout lines
+    # Input: stdin (consumes)
+    # Output: stdout (newline delimited)
+    # Example: printf "foo\nbar\n" | read_stdin
+    # Depends: GNU bash (version 5.1.16)
+    # Version: 0.0.1
+    local input_stdin output;
+
+    # Store stdin
+    if [[ -p /dev/stdin ]]; then
+        input_stdin="$(cat -)";
+    fi; 
+    
+    # Store as output array elements
+    ## Read in stdin
+    if [[ -n $input_stdin ]]; then
+        while read -r line; do
+            output+=("$line");
+        done < <(printf "%s\n" "$input_stdin");
+    fi;
+
+    # Print to stdout
+    printf "%s\n" "${output[@]}";
+}; # read stdin to stdout lines
+read_psarg() {
+    # Desc: Reads arguments; outputs as stdout lines
+    # Input: args
+    # Output: stdout (newline delimited)
+    # Example: read_psarg "$@"
+    # Depends: GNU bash (version 5.1.16)
+    # Version: 0.0.1
+    local input_psarg output;
+    
+    # Store arguments
+    if [[ $# -gt 0 ]]; then
+        input_psarg="$*";
+    fi;
+    
+    # Store as output array elements
+    ## Read in positional arguments
+    if [[ -n $input_psarg ]]; then
+        for arg in "$@"; do
+            output+=("$arg");
+        done;
+    fi;
+
+    # Print to stdout
+    printf "%s\n" "${output[@]}";
+}; # read positional argument to stdout lines
+find_flist() {
+    # Desc: print file list to stdout via `find` using script parameters
+    # Input: arg1: path to dir
+    #        var: find_depth
+    #        var: pattern_find_iregex
+    #        var: find_size
+    if [[ ! -d "$1" ]]; then return 1; fi;
+    must find "$1" -maxdepth "$fdepth" -type f -iregex "$firegex" -size +"$fsize";
+}; # print file list to stdout from dir with script parameters
+main() {
+    # Input: var: firegex     find iregex file name pattern
+    #        var: fsize       find minimum file siz
+    #        var: fc_falloff  characteristic file count falloff in the output
+    #        var: fc_redbase  logarithm base to reduce output file count
+
+    local re_dotfile;
+    declare -a dirs_stdin dirs_psarg;
+    declare -a paths_files;
+    declare list_paths_files;
+    declare -a cmd_args;
+    check_depends;
+
+    yell "STATUS:$SECONDS:Started.";
+    #Populate dirs_stdin and dirs_psarg arrays
+    ## Read stdin as lines
+    re_dotfile="^\."; # first char is a dot
+    while read -r line; do
+        line="$(readlink -e "$line")";
+        # Check if dir
+        if [[ ! -d "$line" ]]; then
+            echo "ERROR:Not a dir:$line" 1>&2;
+            continue;
+        fi;
+        dir_name="$(basename "$line")";
+        # Exclude dotdirs
+        if [[ "$dir_name" =~ $re_dotfile ]]; then
+            echo "ERROR:Is a dotdir:$line" 1>&2;
+            continue
+        fi;
+        dirs_stdin+=("$line");
+    done < <(read_stdin);
+    yell "STATUS:$SECONDS:Read stdin.";
+    ## Read positional arguments as lines
+    re_dotfile="^\."; # first char is a dot
+    while read -r line; do
+        line="$(readlink -e "$line")";
+        # Check if dir
+        if [[ ! -d "$line" ]]; then
+            echo "ERROR:Not a dir:$line" 1>&2;
+            continue;
+        fi;
+        dir_name="$(basename "$line")";
+        # Exclude dotdirs
+        if [[ "$dir_name" =~ $re_dotfile ]]; then
+            echo "ERROR:Is a dotdir:$line" 1>&2;
+            continue
+        fi;
+        dirs_psarg+=("$line");
+    done < <(read_psarg "$@");
+    yell "STATUS:$SECONDS:Read posargs.";
+    
+    # Catch all arrays empty
+    if [[ "${#dirs_stdin[@]}" -le 0 ]] && [[ "${#dirs_psarg[@]}" -le 0 ]]; then
+        die "FATAL:No valid directories provided.";
+    fi;
+
+    # Generate file list
+    ## Call find_filelist() in parallel for positional argument input
+    if [[ "${#dirs_psarg[@]}" -gt 0 ]]; then
+        fdepth="$fdepth_posarg"; export fdepth; # for dirs from positional arguments
+        paths_files+=("$( parallel find_flist {} "$fdepth" "$firegex" "$fsize" ::: "${dirs_psarg[@]}" )"); # See [1]
+    fi;
+    ## Call find_filelist() in parallel for stdin input
+    if [[ "${#dirs_stdin[@]}" -gt 0 ]]; then
+        fdepth="$fdepth_stdin"; export fdepth; # 1 for dirs from stdin
+        paths_files+=("$( parallel find_flist {} "$fdepth" "$firegex" "$fsize" ::: "${dirs_stdin[@]}" )"); # See [1]
+    fi;
+
+    # Convert paths_files array into file list
+    for i in "${!paths_files[@]}"; do
+        list_paths_files="$(printf "%s\n%s" "${paths_files[$i]}" "$list_paths_files")";
+    done;
+    # Get stats
+    fc="$(wc -l < <(echo -n "$list_paths_files"))";
+    echo "STATUS:$SECONDS:file count:fc:$fc"
+    yell "STATUS:$SECONDS:Generated file list.";
+
+    # Sort, remove duplicate paths
+    list_paths_files="$(echo "$list_paths_files" | sort -u | tr -s '\n')";
+    yell "STATUS:$SECONDS:Sorted and deduplicated list.";
+
+    # Remove paths with dotfiles
+    list_paths_files="$(echo "$list_paths_files" | grep -viE "/\." )";
+    yell "STATUS:$SECONDS:Removed dotfiles.";
+
+    # Write playlist
+    list_paths_files_tmp="/dev/shm/$(date +%Y%m%dT%H%M%S.%N%z)"..mpv_paths.txt;
+    ## Reduce output file count if greater than falloff
+    if [[ $fc -gt $fc_falloff ]]; then
+            bc_exp="$fc_falloff * (1 + l( $fc / $fc_falloff )/l($fc_redbase))";
+            fc_out="$( echo "$bc_exp" | bc -l )";
+    else
+        fc_out="$fc";        
+    fi;
+    ## Reduce output file count by fixed fraction (bkshuf optimization)
+    fc_out="$(echo "$fc_out * 0.75" | bc -l)";
+    ## Select subset via bkshuf
+    ### Specify bkshuf-specific environment variables
+    export BKSHUF_PARAM_LINC=1000000; # for these numbers of lines of input..
+    export BKSHUF_PARAM_GSIZE=25;     # target this group size
+    ### Round file count down
+    fc_out="$(printf "%.0f" "$fc_out")"; # round float down to int
+    ### Get neighbor-preserving shuffled subset (size $fc_out)
+    yell "STATUS:$SECONDS:Selecting $fc_out files via bkshuf...";
+    must \
+        echo -n "$list_paths_files" | \
+        bkshuf "$fc_out" > "$list_paths_files_tmp";
+    yell "STATUS:$SECONDS:Wrote playlist.";
+
+    # Print stats
+    yell "STATUS:$SECONDS:Built file list in $SECONDS seconds.";
+
+    # Run mpv with filelist
+    ## Form command
+    cmd_args+=("mpv");
+    cmd_args+=("--audio-display=no"); # disable video for audio files
+    cmd_args+=("--vid=no"); # donʼt show video track
+    cmd_args+=("--image-display-duration=0"); # don't show album art
+    cmd_args+=("--af=scaletempo=stride=15:overlap=1:search=15"); # improve scrubbing
+    cmd_args+=("--playlist=$list_paths_files_tmp"); # read playlist
+    declare -p cmd_args; # debug
+    ## Execute command
+    must "${cmd_args[@]}";
+    must rm "$list_paths_files_tmp";
+};
+export -f yell die must read_stdin read_psarg find_flist;
+
+main "$@";
+
+# Author: Steven Baltakatei Sandoval
+# License: GPLv3+