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avformat/rtpdec_h261: Fix sanity checks

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Fixes mbap and quant

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
ThomasVolkert 2014-08-26 14:23:00 +02:00 committed by Michael Niedermayer
parent 604c4eab2b
commit e15824e75b
1 changed files with 2 additions and 2 deletions
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4
libavformat/rtpdec_h261.c
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@ -117,8 +117,8 @@ int ff_h261_handle_packet(AVFormatContext *ctx, PayloadContext *data,
sbit = (buf[0] >> 5) & 0x07; sbit = (buf[0] >> 5) & 0x07;
ebit = (buf[0] >> 2) & 0x07; ebit = (buf[0] >> 2) & 0x07;
gobn = (buf[1] >> 4) & 0x0f; gobn = (buf[1] >> 4) & 0x0f;
mbap = ((buf[1] << 1) & 0x1e) | ((buf[1] >> 7) & 0x01); mbap = ((buf[1] << 1) & 0x1e) | ((buf[2] >> 7) & 0x01);
quant = (buf[1] >> 4) & 0x0f; quant = (buf[2] >> 2) & 0x1f;
/* pass the H.261 payload header and continue with the actual payload */ /* pass the H.261 payload header and continue with the actual payload */
buf += RTP_H261_PAYLOAD_HEADER_SIZE; buf += RTP_H261_PAYLOAD_HEADER_SIZE;