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Code Issues Releases Activity

avformat/mp3dec: Count last partial frame in probe.

Browse Source 
Fixes: regression
Fixes: Ticket8511

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-02-26 18:38:33 +01:00
parent dfa1fc17a5
commit 23645f95ec
1 changed files with 9 additions and 3 deletions
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12
libavformat/mp3dec.c
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@ -87,20 +87,26 @@ static int mp3_read_probe(const AVProbeData *p)
for (framesizes = frames = 0; buf2 < end; frames++) {
MPADecodeHeader h;
int header_emu = 0;
int available;
header = AV_RB32(buf2);
ret = avpriv_mpegaudio_decode_header(&h, header);
if (ret != 0 || end - buf2 < h.frame_size)
if (ret != 0)
break;
for (buf3 = buf2 + 4; buf3 < buf2 + h.frame_size; buf3++) {
available = FFMIN(h.frame_size, end - buf2);
for (buf3 = buf2 + 4; buf3 < buf2 + available; buf3++) {
uint32_t next_sync = AV_RB32(buf3);
header_emu += (next_sync & MP3_MASK) == (header & MP3_MASK);
}
if (header_emu > 2)
break;
buf2 += h.frame_size;
framesizes += h.frame_size;
if (available < h.frame_size) {
frames++;
break;
}
buf2 += h.frame_size;
}
max_frames = FFMAX(max_frames, frames);
max_framesizes = FFMAX(max_framesizes, framesizes);