Merge pull request #131 from DarkKnight2122

Concurrent Downloads and Proactive Memory Management for media downloader engine

app/src/main/kotlin/me/eternal/purrfectsnap/download/DownloadProcessor.kt

@@ -121,6 +121,7 @@ class DownloadProcessor (
                     inputFile.outputStream().use {
                         bitmap.compress(compressFormat, 100, it)
                     }
+                    bitmap.recycle()
                     fileType = FileType.fromFile(inputFile)
                 }
             }
@@ -673,6 +674,10 @@ class DownloadProcessor (
                                     mergedBitmap.compress(compressFormat, 100, it)
                                 }
 
+                                originalBitmap.recycle()
+                                overlayBitmap.recycle()
+                                mergedBitmap.recycle()
+
                                 saveMediaToGallery(pendingTask, mergedImage, downloadMetadata)
                                 mergedImage.delete()
                                 renamedOverlayMedia.delete()

app/src/main/kotlin/me/eternal/purrfectsnap/download/FFMpegProcessor.kt

@@ -92,6 +92,10 @@ class FFMpegProcessor(
 
     private val sharedExecutor = Executors.newSingleThreadExecutor()
 
+    protected fun finalize() {
+        runCatching { sharedExecutor.shutdown() }
+    }
+
     private suspend fun newFFMpegTask(globalArguments: ArgumentList, inputArguments: ArgumentList, outputArguments: ArgumentList) = suspendCancellableCoroutine<FFmpegSession> {
         val stringBuilder = StringBuilder()
         arrayOf(globalArguments, inputArguments, outputArguments).forEach { argumentList ->