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!7

cmodule VideoSplicer > DynPrintLog {
  S inputFile, outputFile;
  S timestamps;
  S originalLength, cutLength;
  
  int volumeThresholdPercent = 15;
  S minSilence = "0.2", leadIn = "0.2", leadOut = "0.2";
  
  
  transient double profileSamplingInterval = 0.05; // 50 ms
  transient int audioWindowSize = iround(profileSamplingInterval*16000);
  
  transient int timeFieldMinWidth = 40;
  transient ImageSurface isPreview;
  transient JAmplitudeGraph graph;
  transient float[] profile;
  
  visual northAndCenterWithMargins(
    vstackWithSpacing(
      withLabel("Input video:", filePathInputWithBrowseButton(dm_textField('inputFile), onChoose := rThread loadVideo)),
      withLabel("Output video:", filePathInputWithBrowseButton(dm_textField('outputFile))),
      centeredLine(
        jbutton("Load video", rThread loadVideo),
        jbutton("Find jump cuts", rThread autoJumpCuts),
        jhspacer(10),
        jbutton("Make video", rThread makeVideo)),
      jCenteredSection("Jump Cut Parameters", centeredLineWithSpacing(20,
        withLabelLeftAndRight("Volume threshold:", dm_spinner volumeThresholdPercent(0, 100), "%"),
        withLabelLeftAndRight("Shortest silence to cut:", jMinWidth(timeFieldMinWidth, dm_centeredTextField minSilence()), "s"),
        withLabel("Lead-in/out:", jMinWidth(timeFieldMinWidth, dm_centeredTextField leadIn())),
        jlabel("/"),
        withLabelToTheRight(jMinWidth(timeFieldMinWidth, dm_centeredTextField leadOut()), "s")
      ))),
    jhsplit(0.2,
      centerAndSouthWithMargin(
        jLiveValueSection(dm_calculatedLiveValue(S, () -> "Timestamps (" + countLines(timestamps) + ")"), dm_textArea('timestamps)),
        vstack(
          withLabel("In duration (est.):", dm_label('originalLength)),
          withLabel("Out duration (est.):", dm_label('cutLength)))
      ),
      northAndCenterWithMargin(
        jsection("Audio", jMinHeight(50, graph =
          setForeground(Color.red, swingNu(JAmplitudeGraph)))),
        hgridWithSpacing(jsection("Preview", jscroll_center(isPreview = jImageSurface())),
        super))));
    
  void loadVideo enter {
    File f = newFile(inputFile);
    if (!fileExists(f)) ret with infoBox("File not found: " + f2s(f));
    S id = md5(f2s(f));
    
    File previewFile = prepareCacheProgramFile("preview-" + id + ".jpg");
    File audioFile = prepareCacheProgramFile("preview-" + id + ".wav");
    if (!fileExists(previewFile)) {
      print("Getting preview image...");
      ffmpeg_getSingleFrame(f, previewFile, 0.0);
      print("Done");
    } else print("Have preview image");
    isPreview.setImageAndZoomToDisplay(loadImage2(previewFile));

    if (!fileExists(audioFile)) {
      print("Extracting audio...");
      ffmpeg_toMonoAudio_16k(f, audioFile);
      print("Done - " + fileInfo(audioFile));
    } else print("Have audio");
    
    print("Getting volume profile...");
    profile = decodeWAVToMonoSamples_floatVolumeProfile(audioFile, audioWindowSize);
    print("Have volume profile (" + nEntries(l(profile)) + ")");
    setField(originalLength := formatMinuteAndSeconds(iceil(l(profile)*profileSamplingInterval)));
    //printStruct(takeFirstOfFloatArray(100, profile));
    
    graph.setValues(profile);
  }
  
  void makeVideo enter {
    if (empty(outputFile)) ret with infoBox("Need output file path");
    File in = newFile(inputFile), out = newFile(outputFile);
    if (empty(timestamps)) autoJumpCuts();
    L<DoubleRange> ranges = parseTimestampRanges(timestamps);
    if (empty(ranges)) ret with infoBox("No timestamps");
    print(+ranges);
    if (fileExists(out) && !confirmOKCancel("Overwrite " + fileName(out) + "?")) ret;
    temp tempInfoBox_noHide("Splicing video...");
    backtickToConsole(ffmpegCmd() + " -y " + ffmpeg_argsForSplice(in, out, ranges));
    if (fileExists(out))
      infoBox("Done splicing video!"  + fileInfo(out));
    else
      infoBox("Something went wrong...");
  }
  
  void autoJumpCuts enter {
    if (profile == null) loadVideo();
    if (profile == null) ret;
    L<DoubleRange> ranges = audio_findSpeechPartsFromVolumeProfile(profile, profileSamplingInterval,
      volumeThreshold := volumeThresholdPercent/100.0,
      minSilenceDuration := parseDouble(minSilence),
      pre := parseDouble(leadIn),
      post := parseDouble(leadOut));
    setField(timestamps := formatTimestampRanges(ranges));
    infoBox("Created " + nSlices(ranges) + ", ready to make video");
  }
  
  start {
    dm_watchField timestamps(r {
      pcall-silent {
        double len = totalLengthOfDoubleRanges(parseTimestampRanges(timestamps));
       setField(cutLength := formatMinuteAndSeconds(iceil(len));
      }
    });
  }
}