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app/src/main/kotlin/me/rhunk/snapenhance/util/MediaDownloaderHelper.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package me.rhunk.snapenhance.util | ||
|
|
||
| import com.arthenica.ffmpegkit.FFmpegKit | ||
| import me.rhunk.snapenhance.Logger | ||
| import me.rhunk.snapenhance.data.FileType | ||
| import me.rhunk.snapenhance.util.download.CdnDownloader | ||
| import java.io.ByteArrayInputStream | ||
| import java.io.File | ||
| import java.io.FileInputStream | ||
| import java.io.FileNotFoundException | ||
| import java.io.FileOutputStream | ||
| import java.io.InputStream | ||
| import java.util.zip.ZipInputStream | ||
|
|
||
| enum class MediaType { | ||
| ORIGINAL, OVERLAY | ||
| } | ||
| object MediaDownloaderHelper { | ||
| fun downloadMediaFromKey(key: String, mergeOverlay: Boolean, isPreviewMode: Boolean, decryptionCallback: (InputStream) -> InputStream): Map<MediaType, ByteArray> { | ||
| val inputStream: InputStream = CdnDownloader.downloadWithDefaultEndpoints(key) ?: throw FileNotFoundException("Unable to get $key from cdn list. Check the logs for more info") | ||
| val content = decryptionCallback(inputStream).readBytes().also { inputStream.close() } | ||
| val fileType = FileType.fromByteArray(content) | ||
| val isZipFile = fileType == FileType.ZIP | ||
|
|
||
| //videos with overlay are packed in a zip file | ||
| //there are 2 files in the zip file, the video (webm) and the overlay (png) | ||
| if (isZipFile) { | ||
| var videoData: ByteArray? = null | ||
| var overlayData: ByteArray? = null | ||
| val zipInputStream = ZipInputStream(ByteArrayInputStream(content)) | ||
| while (zipInputStream.nextEntry != null) { | ||
| val zipEntryData: ByteArray = zipInputStream.readBytes() | ||
| val entryFileType = FileType.fromByteArray(zipEntryData) | ||
| if (entryFileType.isVideo) { | ||
| videoData = zipEntryData | ||
| } else if (entryFileType.isImage) { | ||
| overlayData = zipEntryData | ||
| } | ||
| } | ||
| videoData ?: throw FileNotFoundException("Unable to find video file in zip file") | ||
| overlayData ?: throw FileNotFoundException("Unable to find overlay file in zip file") | ||
| if (mergeOverlay) { | ||
| val mergedVideo = mergeOverlay(videoData, overlayData, isPreviewMode) | ||
| return mapOf(MediaType.ORIGINAL to mergedVideo) | ||
| } | ||
| return mapOf(MediaType.ORIGINAL to videoData, MediaType.OVERLAY to overlayData) | ||
| } | ||
|
|
||
| return mapOf(MediaType.ORIGINAL to content) | ||
| } | ||
|
|
||
| fun mergeOverlay(original: ByteArray, overlay: ByteArray, isPreviewMode: Boolean): ByteArray { | ||
| val originalFileType = FileType.fromByteArray(original) | ||
| val overlayFileType = FileType.fromByteArray(overlay) | ||
| //merge files | ||
| val mergedFile = File.createTempFile("merged", "." + originalFileType.fileExtension) | ||
| val tempVideoFile = File.createTempFile("original", "." + originalFileType.fileExtension).also { | ||
| with(FileOutputStream(it)) { | ||
| write(original) | ||
| close() | ||
| } | ||
| } | ||
| val tempOverlayFile = File.createTempFile("overlay", "." + overlayFileType.fileExtension).also { | ||
| with(FileOutputStream(it)) { | ||
| write(overlay) | ||
| close() | ||
| } | ||
| } | ||
|
|
||
| //TODO: improve ffmpeg speed | ||
| val fFmpegSession = FFmpegKit.execute( | ||
| "-y -i " + | ||
| tempVideoFile.absolutePath + | ||
| " -i " + | ||
| tempOverlayFile.absolutePath + | ||
| " -filter_complex \"[0]scale2ref[img][vid];[img]setsar=1[img];[vid]nullsink; [img][1]overlay=(W-w)/2:(H-h)/2,scale=2*trunc(iw*sar/2):2*trunc(ih/2)\" -c:v libx264 -q:v 13 -c:a copy " + | ||
| " -threads 6 ${(if (isPreviewMode) "-frames:v 1" else "")} " + | ||
| mergedFile.absolutePath | ||
| ) | ||
| tempVideoFile.delete() | ||
| tempOverlayFile.delete() | ||
| if (fFmpegSession.returnCode.value != 0) { | ||
| mergedFile.delete() | ||
| Logger.xposedLog(fFmpegSession.output) | ||
| throw IllegalStateException("Failed to merge video and overlay. See logs for more details.") | ||
| } | ||
| val mergedFileData: ByteArray = FileInputStream(mergedFile).readBytes() | ||
| mergedFile.delete() | ||
| return mergedFileData | ||
| } | ||
| } |