QT5 Conversion + Directory Structure

1 files changed, 273 insertions, 0 deletions

diff --git a/src/components/video.py b/src/components/video.py
new file mode 100644
index 0000000..58ce7a3
--- /dev/null
+++ b/src/components/video.py
@@ -0,0 +1,273 @@
+from PIL import Image, ImageDraw
+from PyQt5 import uic, QtGui, QtCore
+import os
+import subprocess
+import threading
+from queue import PriorityQueue
+from . import __base__
+
+
+class Video:
+    '''Video Component Frame-Fetcher'''
+    def __init__(self, **kwargs):
+        mandatoryArgs = [
+            'ffmpeg',     # path to ffmpeg, usually core.FFMPEG_BIN
+            'videoPath',
+            'width',
+            'height',
+            'scale',      # percentage scale
+            'frameRate',  # frames per second
+            'chunkSize',  # number of bytes in one frame
+            'parent',     # mainwindow object
+            'component',  # component object
+        ]
+        for arg in mandatoryArgs:
+            try:
+                exec('self.%s = kwargs[arg]' % arg)
+            except KeyError:
+                raise __base__.BadComponentInit(arg, self.__doc__)
+
+        self.frameNo = -1
+        self.currentFrame = 'None'
+        if 'loopVideo' in kwargs and kwargs['loopVideo']:
+            self.loopValue = '-1'
+        else:
+            self.loopValue = '0'
+        self.command = [
+            self.ffmpeg,
+            '-thread_queue_size', '512',
+            '-r', str(self.frameRate),
+            '-stream_loop', self.loopValue,
+            '-i', self.videoPath,
+            '-f', 'image2pipe',
+            '-pix_fmt', 'rgba',
+            '-filter:v', 'scale=%s:%s' %
+                scale(self.scale, self.width, self.height, str),
+            '-vcodec', 'rawvideo', '-',
+        ]
+
+        self.frameBuffer = PriorityQueue()
+        self.frameBuffer.maxsize = self.frameRate
+        self.finishedFrames = {}
+
+        self.thread = threading.Thread(
+            target=self.fillBuffer,
+            name=self.__doc__
+        )
+        self.thread.daemon = True
+        self.thread.start()
+
+    def frame(self, num):
+        while True:
+            if num in self.finishedFrames:
+                image = self.finishedFrames.pop(num)
+                return finalizeFrame(
+                    self.component, image, self.width, self.height)
+
+            i, image = self.frameBuffer.get()
+            self.finishedFrames[i] = image
+            self.frameBuffer.task_done()
+
+    def fillBuffer(self):
+        pipe = subprocess.Popen(
+            self.command, stdout=subprocess.PIPE,
+            stderr=subprocess.DEVNULL, bufsize=10**8
+        )
+        while True:
+            if self.parent.canceled:
+                break
+            self.frameNo += 1
+
+            # If we run out of frames, use the last good frame and loop.
+            if len(self.currentFrame) == 0:
+                self.frameBuffer.put((self.frameNo-1, self.lastFrame))
+                continue
+
+            self.currentFrame = pipe.stdout.read(self.chunkSize)
+            if len(self.currentFrame) != 0:
+                self.frameBuffer.put((self.frameNo, self.currentFrame))
+                self.lastFrame = self.currentFrame
+
+
+class Component(__base__.Component):
+    '''Video'''
+
+    modified = QtCore.pyqtSignal(int, dict)
+
+    def widget(self, parent):
+        self.parent = parent
+        self.settings = parent.settings
+        page = uic.loadUi(os.path.join(
+            os.path.dirname(os.path.realpath(__file__)),
+            'video.ui'
+        ))
+        self.videoPath = ''
+        self.x = 0
+        self.y = 0
+        self.loopVideo = False
+
+        page.lineEdit_video.textChanged.connect(self.update)
+        page.pushButton_video.clicked.connect(self.pickVideo)
+        page.checkBox_loop.stateChanged.connect(self.update)
+        page.checkBox_distort.stateChanged.connect(self.update)
+        page.spinBox_scale.valueChanged.connect(self.update)
+        page.spinBox_x.valueChanged.connect(self.update)
+        page.spinBox_y.valueChanged.connect(self.update)
+
+        self.page = page
+        return page
+
+    def update(self):
+        self.videoPath = self.page.lineEdit_video.text()
+        self.loopVideo = self.page.checkBox_loop.isChecked()
+        self.distort = self.page.checkBox_distort.isChecked()
+        self.scale = self.page.spinBox_scale.value()
+        self.xPosition = self.page.spinBox_x.value()
+        self.yPosition = self.page.spinBox_y.value()
+        self.parent.drawPreview()
+        super().update()
+
+    def previewRender(self, previewWorker):
+        self.videoFormats = previewWorker.core.videoFormats
+        width = int(previewWorker.core.settings.value('outputWidth'))
+        height = int(previewWorker.core.settings.value('outputHeight'))
+        self.updateChunksize(width, height)
+        frame = self.getPreviewFrame(width, height)
+        if not frame:
+            return self.blankFrame(width, height)
+        else:
+            return frame
+
+    def preFrameRender(self, **kwargs):
+        super().preFrameRender(**kwargs)
+        width = int(self.worker.core.settings.value('outputWidth'))
+        height = int(self.worker.core.settings.value('outputHeight'))
+        self.blankFrame_ = self.blankFrame(width, height)
+        self.updateChunksize(width, height)
+        self.video = Video(
+            ffmpeg=self.parent.core.FFMPEG_BIN, videoPath=self.videoPath,
+            width=width, height=height, chunkSize=self.chunkSize,
+            frameRate=int(self.settings.value("outputFrameRate")),
+            parent=self.parent, loopVideo=self.loopVideo,
+            component=self, scale=self.scale
+        ) if os.path.exists(self.videoPath) else None
+
+    def frameRender(self, moduleNo, arrayNo, frameNo):
+        if self.video:
+            return self.video.frame(frameNo)
+        else:
+            return self.blankFrame_
+
+    def loadPreset(self, pr, presetName=None):
+        super().loadPreset(pr, presetName)
+        self.page.lineEdit_video.setText(pr['video'])
+        self.page.checkBox_loop.setChecked(pr['loop'])
+        self.page.checkBox_distort.setChecked(pr['distort'])
+        self.page.spinBox_scale.setValue(pr['scale'])
+        self.page.spinBox_x.setValue(pr['x'])
+        self.page.spinBox_y.setValue(pr['y'])
+
+    def savePreset(self):
+        return {
+            'preset': self.currentPreset,
+            'video': self.videoPath,
+            'loop': self.loopVideo,
+            'distort': self.distort,
+            'scale': self.scale,
+            'x': self.xPosition,
+            'y': self.yPosition,
+        }
+
+    def pickVideo(self):
+        imgDir = self.settings.value("backgroundDir", os.path.expanduser("~"))
+        filename = QtGui.QFileDialog.getOpenFileName(
+            self.page, "Choose Video",
+            imgDir, "Video Files (%s)" % " ".join(self.videoFormats)
+        )
+        if filename:
+            self.settings.setValue("backgroundDir", os.path.dirname(filename))
+            self.page.lineEdit_video.setText(filename)
+            self.update()
+
+    def getPreviewFrame(self, width, height):
+        if not self.videoPath or not os.path.exists(self.videoPath):
+            return
+
+        command = [
+            self.parent.core.FFMPEG_BIN,
+            '-thread_queue_size', '512',
+            '-i', self.videoPath,
+            '-f', 'image2pipe',
+            '-pix_fmt', 'rgba',
+            '-filter:v', 'scale=%s:%s' %
+                scale(self.scale, width, height, str),
+            '-vcodec', 'rawvideo', '-',
+            '-ss', '90',
+            '-vframes', '1',
+        ]
+        pipe = subprocess.Popen(
+            command, stdout=subprocess.PIPE,
+            stderr=subprocess.DEVNULL, bufsize=10**8
+        )
+        byteFrame = pipe.stdout.read(self.chunkSize)
+        frame = finalizeFrame(self, byteFrame, width, height)
+        pipe.stdout.close()
+        pipe.kill()
+
+        return frame
+
+    def updateChunksize(self, width, height):
+        if self.scale != 100 and not self.distort:
+            width, height = scale(self.scale, width, height, int)
+        self.chunkSize = 4*width*height
+
+    def command(self, arg):
+        if not arg.startswith('preset=') and '=' in arg:
+            key, arg = arg.split('=', 1)
+            if key == 'path' and os.path.exists(arg):
+                if os.path.splitext(arg)[1] in self.core.videoFormats:
+                    self.page.lineEdit_video.setText(arg)
+                    self.page.spinBox_scale.setValue(100)
+                    self.page.checkBox_loop.setChecked(True)
+                    return
+                else:
+                    print("Not a supported video format")
+                    quit(1)
+        super().command(arg)
+
+    def commandHelp(self):
+        print('Load a video:\n    path=/filepath/to/video.mp4')
+
+def scale(scale, width, height, returntype=None):
+    width = (float(width) / 100.0) * float(scale)
+    height = (float(height) / 100.0) * float(scale)
+    if returntype == str:
+        return (str(int(width)), str(int(height)))
+    elif returntype == int:
+        return (int(width), int(height))
+    else:
+        return (width, height)
+
+def finalizeFrame(self, imageData, width, height):
+    if self.distort:
+        try:
+            image = Image.frombytes(
+                'RGBA',
+                (width, height),
+                imageData)
+        except ValueError:
+            print('#### ignored invalid data caused by distortion ####')
+            image = self.blankFrame(width, height)
+    else:
+        image = Image.frombytes(
+            'RGBA',
+            scale(self.scale, width, height, int),
+            imageData)
+
+    if self.scale != 100 \
+        or self.xPosition != 0 or self.yPosition != 0:
+        frame = self.blankFrame(width, height)
+        frame.paste(image, box=(self.xPosition, self.yPosition))
+    else:
+        frame = image
+    return frame