From c20577806f0a161c6867e72f884d020a253de10a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jan=20Ekstr=C3=B6m?= Date: Tue, 28 Sep 2021 00:12:42 +0300 Subject: [PATCH] avformat/aacdec: enable probesize-sized resyncs mid-stream Before adts_aac_resync would always bail out after probesize amount of bytes had been progressed from the start of the input. Now just query the current position when entering resync, and at most advance probesize amount of data from that start position. Fixes #9433 --- libavformat/aacdec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavformat/aacdec.c b/libavformat/aacdec.c index ab97be60b5..a476640904 100644 --- a/libavformat/aacdec.c +++ b/libavformat/aacdec.c @@ -83,10 +83,12 @@ static int adts_aac_probe(const AVProbeData *p) static int adts_aac_resync(AVFormatContext *s) { uint16_t state; + int64_t start_pos = avio_tell(s->pb); // skip data until an ADTS frame is found state = avio_r8(s->pb); - while (!avio_feof(s->pb) && avio_tell(s->pb) < s->probesize) { + while (!avio_feof(s->pb) && + (avio_tell(s->pb) - start_pos) < s->probesize) { state = (state << 8) | avio_r8(s->pb); if ((state >> 4) != 0xFFF) continue;