ffmdec: set avio buffer to ffm->packet_size, avoid dirty reads

14 years ago · 8ba987bff3
parent 0b99e858d1
commit 8ba987bff3
1 changed files with 5 additions and 0 deletions
--- a/libavformat/ffmdec.c
+++ b/libavformat/ffmdec.c
@ -121,6 +121,11 @@ static int ffm_read_data(AVFormatContext *s,
            if (avio_tell(pb) == ffm->file_size)
                avio_seek(pb, ffm->packet_size, SEEK_SET);
    retry_read:
+            if (pb->buffer_size != ffm->packet_size) {
+                int64_t tell = avio_tell(pb);
+                url_setbufsize(pb, ffm->packet_size);
+                avio_seek(pb, tell, SEEK_SET);
+            }
            id = avio_rb16(pb); /* PACKET_ID */
            if (id != PACKET_ID)
                if (ffm_resync(s, id) < 0)