Merge branch 'component-backgrounds' of github.com:IamDH4/audio-visualizer-python into feature-newgui

1 files changed, 141 insertions, 0 deletions

diff --git a/components/video.py b/components/video.py
new file mode 100644
index 0000000..3162279
--- /dev/null
+++ b/components/video.py
@@ -0,0 +1,141 @@
+from PIL import Image, ImageDraw
+from PyQt4 import uic, QtGui, QtCore
+import os, subprocess, threading
+from queue import PriorityQueue
+from . import __base__
+
+class Video:
+    '''Video Component Frame-Fetcher'''
+    def __init__(self, ffmpeg, videoPath, width, height, frameRate, chunkSize, parent, loopVideo):
+        self.parent = parent
+        self.chunkSize = chunkSize
+        self.size = (width, height)
+        self.frameNo = -1
+        self.currentFrame = 'None'
+        if loopVideo:
+            self.loopValue = '-1'
+        else:
+            self.loopValue = '0'
+        self.command = [
+            ffmpeg,
+            '-thread_queue_size', '512',
+            '-r', frameRate,
+            '-stream_loop', self.loopValue,
+            '-i', videoPath,
+            '-f', 'image2pipe',
+            '-pix_fmt', 'rgba',
+            '-filter:v', 'scale='+str(width)+':'+str(height),
+            '-vcodec', 'rawvideo', '-',
+        ]
+        
+        self.frameBuffer = PriorityQueue()
+        self.frameBuffer.maxsize = int(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 Image.frombytes('RGBA', self.size, image)
+            i, image = self.frameBuffer.get()
+            self.finishedFrames[i] = image
+            self.frameBuffer.task_done()
+    
+    def fillBuffer(self):        
+        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 = self.pipe.stdout.read(self.chunkSize)
+            #print('creating frame #%s' % str(self.frameNo))
+            if len(self.currentFrame) != 0:
+                self.frameBuffer.put((self.frameNo, self.currentFrame))
+                self.lastFrame = self.currentFrame
+
+class Component(__base__.Component):
+    '''Video'''
+    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)
+        
+        self.page = page
+        return page
+
+    def update(self):
+        self.videoPath = self.page.lineEdit_video.text()
+        self.loopVideo = self.page.checkBox_loop.isChecked()
+        self.parent.drawPreview()
+        
+    def previewRender(self, previewWorker):
+        width = int(previewWorker.core.settings.value('outputWidth'))
+        height = int(previewWorker.core.settings.value('outputHeight'))
+        self.chunkSize = 4*width*height
+        return self.getPreviewFrame(width, height)
+    
+    def preFrameRender(self, **kwargs):
+        super().preFrameRender(**kwargs)
+        width = int(self.worker.core.settings.value('outputWidth'))
+        height = int(self.worker.core.settings.value('outputHeight'))
+        self.chunkSize = 4*width*height
+        self.video = Video(self.parent.core.FFMPEG_BIN, self.videoPath,
+            width, height, self.settings.value("outputFrameRate"),
+            self.chunkSize, self.parent, self.loopVideo)
+        
+    def frameRender(self, moduleNo, arrayNo, frameNo):
+        return self.video.frame(frameNo)
+
+    def loadPreset(self, pr):
+        self.page.lineEdit_video.setText(pr['video'])
+        
+    def savePreset(self):
+        return {
+            'video' : self.videoPath,
+        }
+        
+    def pickVideo(self):
+        imgDir = self.settings.value("backgroundDir", os.path.expanduser("~"))
+        filename = QtGui.QFileDialog.getOpenFileName(self.page,
+            "Choose Video", imgDir, "Video Files (*.mp4 *.mov)")
+        if filename: 
+            self.settings.setValue("backgroundDir", os.path.dirname(filename))
+            self.page.lineEdit_video.setText(filename)
+            self.update()
+    
+    def getPreviewFrame(self, width, height):
+        command = [
+            self.parent.core.FFMPEG_BIN,
+            '-thread_queue_size', '512',
+            '-i', self.videoPath,
+            '-f', 'image2pipe',
+            '-pix_fmt', 'rgba',
+            '-filter:v', 'scale='+str(width)+':'+str(height),
+            '-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)
+        image = Image.frombytes('RGBA', (width, height), byteFrame)
+        pipe.stdout.close()
+        pipe.kill()
+        return image