[FFmpeg] Work around a bug with corrupted data

According to FFmpeg documentation, the out parameter is "set to size of parsed buffer or zero if not yet finished." however this is only the case if no error occurred; otherwise it is left untouched. We want the invalid content to generate a decoding error, so we set size to inputSize to ensure decoding failed later.

1 files changed, 2 insertions, 2 deletions

diff --git a/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp b/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp
index 5c1b6c97b1..aec1e91360 100644
--- a/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp
@@ -181,8 +181,8 @@ FFmpegVideoDecoder<LIBAV_VER>::DoDecode(MediaRawData* aSample, bool* aGotFrame)
 #endif
       )) {
     while (inputSize) {
-      uint8_t* data;
-      int size;
+      uint8_t* data = inputData;
+      int size = inputSize;
       int len = mLib->av_parser_parse2(mCodecParser, mCodecContext, &data, &size,
                                        inputData, inputSize,
                                        aSample->mTime, aSample->mTimecode,