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!7

cmodule VideoSplicer > DynPrintLog {
  S inputFile, outputFile;
  S timestamps;
  
  transient double profileSamplingInterval = 0.05; // 50 ms
  transient int audioWindowSize = iround(profileSamplingInterval*16000);
  transient ImageSurface isPreview;
  transient JAmplitudeGraph graph;
  transient float[] profile;
  
  visual jvsplit(northAndCenterWithMargins(
    vstackWithSpacing(
      withLabel("Input video:", filePathInputWithBrowseButton(dm_textField('inputFile))),
      withLabel("Output video:", filePathInputWithBrowseButton(dm_textField('outputFile))),
      rightAlignedLine(
        jbutton("Load video", rThread loadVideo),
        jbutton("Auto jump cuts!", rThread autoJumpCuts),
        jbutton("Make video", rThread makeVideo)),
      jsection("Audio", jMinHeight(50, graph =
        setForeground(Color.red, swingNu(JAmplitudeGraph))))),
    jsection("Timestamps", dm_textArea('timestamps))),
      jhsplit(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)) + ")");
    //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);
    L<DoubleRange> ranges = parseTimestampRanges(timestamps);
    if (empty(ranges))
      ret with infoBox("Need 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);
    setField(timestamps := formatTimestampRanges(ranges));
    infoBox("Created " + nSlices(ranges) + ", ready to make video");
  }
}