Calculate progress against estimated audio size CGI parameter

webif/html/browse/audio/audio.jim

@@ -1,6 +1,5 @@
 #!/mod/bin/jimsh
 
-package require sqlite3
 package require cgi
 source /mod/webif/lib/setup
 require ts.class system.class settings.class
@@ -10,13 +9,27 @@ jscss audio.js
 header
 
 set s [settings]
-set type [$s audiomp3descr [$s audiomp3]]
+set slow [$s audiomp3]
+set type [$s audiomp3descr $slow]
 
 set rfile [cgi_get file]
 set ts [ts fetch $rfile]
 set dir [file dirname $rfile]
 set len [$ts duration 1]
 
+# guess output size based on video file size
+set asize [$ts size]
+# using slight overestimates of typical audio:video size ratio
+if {[$ts get mpeglevel] eq 4} {
+   	if {$slow} { # aac-> mp3
+   		set asize [expr $asize*0.12]
+    } else { # aac-> loas
+        set asize [expr $asize*0.09]
+    }
+} else { # mp2 -> mp[23] (similar)
+    set asize [expr $asize*0.07]
+}
+
 puts "
 
 <fieldset class=cleft>
@@ -30,6 +43,7 @@ puts "
 <span class=hidden id=params
     dir=\"[cgi_quote_url $dir]\"
     rfile=\"[cgi_quote_url $rfile]\"
+    asize=\"[cgi_quote_url $asize]\"
 ></span>
 
 <div id=audiodiv style=\"padding: 1em\">
@@ -45,4 +59,3 @@ Extracting audio: <div id=progressbar></div>
 </fieldset>
 
 "
-

webif/html/browse/audio/audio.js

@@ -3,7 +3,7 @@ var handle = 0;
 
 function update()
 {
-	$.get('progress.jim?file=' + $('#params').attr('rfile'),
+	$.get('progress.jim?file=' + $('#params').attr('rfile') + '&asize=' + $('#params').attr('asize'),
 	    function(data) {
 		if (handle)
 			$('#progressbar').reportprogress(data);
@@ -12,25 +12,25 @@ function update()
 
 $(document).ready(function() {
 
-$('#progressbar').reportprogress(0);
+	$('#progressbar').reportprogress(0);
 
-$('#back').button().click(function() {
-	window.location = '/go/browse?dir=' + $('#params').attr('dir');
-});
-
-$('#audioit').button().click(function() {
-	$('#audiodiv').hide('slow');
-	$('#progressdiv').show('slow');
-	$('#back').hide();
-	handle = setInterval("update()", 1000);
-	$('#output').load('execute.jim?file=' + $('#params').attr('rfile'),
-	    function() {
-		clearInterval(handle);
-		handle = 0;
-		$('#back').show();
-		$('#progressbar').reportprogress(100);
+	$('#back').button().click(function() {
+		window.location = '/go/browse?dir=' + $('#params').attr('dir');
+	});
+
+	$('#audioit').button().click(function() {
+		$('#audiodiv').hide('slow');
+		$('#progressdiv').show('slow');
+		$('#back').hide();
+		handle = setInterval("update()", 1000);
+		$('#output').load('execute.jim?file=' + $('#params').attr('rfile'),
+			function() {
+			clearInterval(handle);
+			handle = 0;
+			$('#back').show();
+			$('#progressbar').reportprogress(100);
+		});
 	});
-});
 
 });
 

webif/html/browse/audio/execute.jim

@@ -1,6 +1,5 @@
 #!/mod/bin/jimsh
 
-package require sqlite3
 package require cgi
 source /mod/webif/lib/setup
 require ts.class system.class settings.class
@@ -9,16 +8,12 @@ httpheader
 
 set rfile [cgi_get file]
 set ts [ts fetch $rfile]
-set dir [file dirname $rfile]
-set len [$ts duration 1]
-
-set xstart [clock milliseconds]
 
 set base [file rootname $rfile]
-set shname [file tail $base]
-puts "Processing $shname"
+puts "Processing [file tail $base]]"
 
 set slow [[settings] audiomp3]
+set xstart [clock milliseconds]
 
 set token [system startop -multiple mp3 $rfile]
 puts [$ts mkmp3 $slow]
@@ -26,4 +21,3 @@ system endop $token
 
 set xtime [expr [expr [clock milliseconds] - $xstart] / 1000.0]
 puts "Time taken: $xtime"
-

webif/html/browse/audio/progress.jim

@@ -7,16 +7,17 @@ require ts.class
 httpheader
 
 set tsfile [cgi_get file]
+set asize [cgi_get asize]
 set rfile [file normalize $tsfile]
 set bfile [file rootname $rfile]
 
 if {![file exists "${bfile}.mp3"]} {
 	puts "0"
+} elseif {! ($asize > 0) } {
+	puts "0"
+}
 } else {
-	set sz [file size $rfile]
-	set nsz [expr [file size "${bfile}.mp3"] / 0.3]
-
-	set perc [expr $nsz * 100 / $sz]
+	set perc [expr [file size "${bfile}.mp3"] * 100 / $asize]
 	if {$perc > 100} { set perc 100 }
 	puts $perc
 }

webif/lib/ts.class

@@ -13,6 +13,9 @@ class ts {
 	title		""
 	synopsis	""
 	definition	""
+	mpeglevel	2
+	# discriminate between 2=MPEG Video/MP2 and 4=H.264/AAC, say 260kbyte/s vs 150
+	_mpegLevelThreshold 205000
 	channel_num	0
 	channel_name	""
 	start		0
@@ -38,6 +41,7 @@ class ts {
 	tvdb_data	{}
 }
 
+
 ts method bfile {} {
 	return [file tail [file rootname $file]]
 }
@@ -67,6 +71,12 @@ ts method _parse {line} {
 	set synopsis [xconv $synopsis]
 
 	set flags [split [string range $flags_list 0 end-1] ,]
+
+	# discriminate between MPEG Video/MP2 and H.264/AAC
+	set len [$self duration 1]
+	if {$len > 0 && ([$self size]/$len < [[ts] get _mpeglevelThreshold])} {
+		set mpeglevel 4
+	}
 }
 
 ts method lastmod {} {
@@ -393,7 +403,7 @@ ts method mkmp3 {{slow false} {tmp ""} {v 0} {br 128}} {
 		set ext mp3
 	} else {
 		set opts [list -c:a copy]
-		if {$definition eq "HD"} {
+		if {$mpeglevel eq 4} {
 			set ext loas
 		} else {
 			set ext mp2