X-Git-Url: http://club.cc.cmu.edu/~cmccabe/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=superrip.rb;h=cc413db54e924d753286f72d72c2f330dc6ae56d;hb=24c0e76c1c9f8ba17e0028ccdf782d89bb238884;hp=9c5caec3d9469845e14f5378107c6a5cc7878a68;hpb=49eda4c2fc082d2912c1adcfa0e06c9e3dbe550e;p=cmccabe-bin

diff --git a/superrip.rb b/superrip.rb
index 9c5caec..cc413db 100755
--- a/superrip.rb
+++ b/superrip.rb
@@ -16,7 +16,7 @@ require 'ostruct'
 #-----------------------------------------------------------------
 # constants
 #-----------------------------------------------------------------
-$cd_dev = "/dev/cdrom"
+$children = Hash.new
 
 #-----------------------------------------------------------------
 # functions
@@ -34,44 +34,69 @@ end
 
 def get_number_of_tracks_on_cd
   look_for_tracks = false
-  IO.popen("cdda2wav -v summary -J dev=#{$cd_dev} 2>&1", "r") do |io|
+  lines = Array.new
+  IO.popen("cdda2wav -v summary -J dev=#{$opts.cd_dev} 2>&1", "r") do |io|
     io.readlines.each do |line|
       line.chomp!
+      lines << line
       if (line =~ /^AUDIOtrack/) then
         look_for_tracks = true
       elsif (look_for_tracks == true) then
         look_for_tracks = false
-        line =~ /[ \t]*1-([1234567890][1234567890]*)[^1234567890]/ \
-          or raise "couldn't understand cdda2wav output!"
+        line =~ /[ \t]*1-([ 1234567890][1234567890]*)[^1234567890]/ \
+          or raise "couldn't understand cdda2wav output! (line:#{line})"
         return $1.to_i
       end
     end
   end
-  raise "couldn't find what we were looking for in cdda2wav output!"
+  raise "couldn't find what we were looking for in cdda2wav output! \
+output:#{lines.join('\n')}"
+end
+
+# Process the WAV file into an MP3 and FLAC file.
+# This is done in a background process.
+def process_wav(track)
+  FileUtils.mkdir_p(track.flac_dir, $fu_args)
+  my_system("flac -f '#{track.wav_file_name}' \
+--output-name='#{track.flac_file_name}' &>/dev/null")
+  my_system("flac --test '#{track.flac_file_name}' &>/dev/null")
+  FileUtils.mkdir_p(track.mp3_dir, $fu_args)
+  my_system("lame -q 1 -b 192 '#{track.wav_file_name}' \
+'#{track.mp3_file_name}' &>/dev/null")
+  FileUtils.rm_f(track.wav_file_name, $fu_args)
 end
 
 def audiorip(tnum, track)
   begin
-    my_system("nice -1 cdparanoia -w -d #{$cd_dev} #{tnum}")
+    my_system("nice -1 cdparanoia -w -d #{$opts.cd_dev} #{tnum}")
   rescue
     raise "failed to rip track #{tnum} (#{track.name})"
   end
   # cdparanoia always outputs to cdda.wav
   FileUtils.mv("cdda.wav", track.wav_file_name, $fu_args)
 
-  # TODO: spawn a thread to do this stuff in the background
-  FileUtils.mkdir_p(track.flac_dir, $fu_args)
-  my_system("flac -f '#{track.wav_file_name}' \
---output-name='#{track.flac_file_name}' &>/dev/null")
-  begin
-    my_system("flac --test '#{track.flac_file_name}' &>/dev/null")
-  rescue
-    raise "failed to encode #{track.flac_file_name}"
+  # If there are too many processes, wait for one of them to terminate
+  if ($children.keys.length > $opts.max_children) then
+    pid, status = Process.wait2(-1)
+    if (status.exitstatus != 0) then
+      raise "process #{pid} failed with exitstatus #{status.exitstatus}"
+    end
+    $children.delete(pid)
+  end
+
+  pid = Process.fork
+  if (pid == nil) then
+    retcode = 0
+    begin
+      process_wav(track)
+    rescue Exception => e
+      puts "*** FATAL ERROR: #{e}"
+      retcode = 1
+    end
+    Kernel.exit(retcode)
+  else
+    $children[pid] = 1
   end
-  FileUtils.mkdir_p(track.mp3_dir, $fu_args)
-  my_system("lame -q 1 -b 192 '#{track.wav_file_name}' \
-'#{track.mp3_file_name}' &>/dev/null")
-  FileUtils.rm_f(track.wav_file_name, $fu_args)
 end
 
 #-----------------------------------------------------------------
@@ -81,12 +106,18 @@ class MyOptions
   def self.parse(args)
     opts = OpenStruct.new
     opts.dry_run = false
+    opts.max_children = 4
+    opts.cd_dev = "/dev/cdrom"
     $fu_args = { :verbose => true }
 
     # Fill in opts values
     parser = OptionParser.new do |myparser|
       myparser.banner = "Usage: #{ File.basename($0) } [opts]"
       myparser.separator("Specific options:")
+      myparser.on("--dev [DEV]", "-D",
+                  "choose the cdrom device file to use") do |dev|
+        opts.cd_dev = dev
+      end
       myparser.on("--dry-run", "-d",
             "Show what would be done, without doing it.") do |a|
         opts.dry_run = true
@@ -102,6 +133,14 @@ class MyOptions
         opts.manifest_file = file
         opts.partial = true
       end
+      myparser.on("--max-children [NCHILD]", "-j",
+            "The maximum number of child processes to allow at any \
+given time") do |nchild|
+        opts.max_children = nchild.to_i
+        if (opts.max_children < 1) then
+          raise "can't set max_children to #{opts.max_children}"
+        end
+      end
     end
     parser.parse!(args)
 
@@ -154,11 +193,16 @@ class Manifest
     if (@t.empty?) then
       raise "you must define some tracks"
     end
-    @t.each { |t| t.validate }
-    if (not $opts.partial) then
-      (1..num_tracks).each do |t|
-        if not @t[t].defined?
-          raise "don't know what to do with track #{t}"
+    if ($opts.partial) then
+      highest_track = @t.keys.sort[-1]
+      if (num_tracks < highest_track) then
+        raise "can't rip track #{highest_track}, because there are \
+only #{num_tracks} tracks"
+      end
+    else
+      (1..num_tracks).each do |tnum|
+        if not @t.has_key?(tnum)
+          raise "don't know what to do with track #{tnum}"
         end
       end
     end
@@ -171,6 +215,12 @@ class Manifest
       next unless @t.has_key?(tnum)
       audiorip(tnum, @t[tnum])
     end
+    prc = Process.waitall
+    prc.each do |pair|
+      if (pair[1].exitstatus != 0) then
+        raise "process #{pair[0]} failed with exitstatus #{pair[1].exitstatus}"
+      end
+    end
   end
 
   def inspect
@@ -204,5 +254,7 @@ manifest = Manifest.new($opts.manifest_file)
 puts manifest.inspect
 num_tracks = get_number_of_tracks_on_cd()
 puts "found #{num_tracks} tracks"
+manifest.validate(num_tracks)
 manifest.rip(num_tracks)
+puts "*** FINISHED ***"
 exit 0