[FFmpeg-devel] [PATCH]lavf/wavdec: Allow decoding of invalid large wav files

[Carl Eugen Hoyos]

Hi!

Valid wav files are not larger than 4G, files that are 
larger are truncated by current FFmpeg.
Attached patch allows reading such files if the size 
was (imo "correctly") written to -1.

Please comment, Carl Eugen
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diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c
index 410c2ec..332f643 100644
--- a/libavformat/wavdec.c
+++ b/libavformat/wavdec.c
@@ -335,9 +335,12 @@ static int wav_read_header(AVFormatContext *s)
 
             if (rf64) {
                 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
-            } else {
+            } else if (size != 0xFFFFFFFF) {
                 data_size    = size;
                 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
+            } else {
+                data_size    = 0;
+                next_tag_ofs = wav->data_end = INT64_MAX;
             }
 
             data_ofs = avio_tell(pb);