eden-emu/opus
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Do up-front validation of multistream packets

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Prevents the decoder from being out-of-sync on an invalid packet. Also
returns OPUS_INVALID_PACKET on a corrupted FEC packet.
This commit is contained in:
Jean-Marc Valin 2013-10-11 18:06:00 -04:00
parent aee4d80576
commit ed4632345e
3 changed files with 59 additions and 10 deletions
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19
src/opus_decoder.c
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@ -355,7 +355,7 @@ static int opus_decode_frame(OpusDecoder *st, const unsigned char *data,
pcm_ptr[i] = 0;
} else {
RESTORE_STACK;
return OPUS_INVALID_PACKET;
return OPUS_INTERNAL_ERROR;
}
}
pcm_ptr += silk_frame_size * st->channels;
@ -581,7 +581,7 @@ static int parse_size(const unsigned char *data, opus_int32 len, opus_int16 *siz
}
}
static int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
int self_delimited, unsigned char *out_toc,
const unsigned char *frames[48], opus_int16 size[48], int *payload_offset)
{
@ -710,6 +710,9 @@ static int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
size[count-1] = (opus_int16)last_size;
}
if (payload_offset)
*payload_offset = (int)(data-data0);
if (frames)
{
for (i=0;i<count;i++)
@ -722,9 +725,6 @@ static int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
if (out_toc)
*out_toc = toc;
if (payload_offset)
*payload_offset = (int)(data-data0);
return count;
}
@ -777,6 +777,9 @@ int opus_decode_native(OpusDecoder *st, const unsigned char *data,
count = opus_packet_parse_impl(data, len, self_delimited, &toc, NULL, size, &offset);
if (count<0)
return count;
data += offset;
if (decode_fec)
@ -814,11 +817,7 @@ int opus_decode_native(OpusDecoder *st, const unsigned char *data,
return frame_size;
}
}
tot_offset = 0;
if (count < 0)
return count;
tot_offset += offset;
tot_offset = offset;
if (count*packet_frame_size > frame_size)
return OPUS_BUFFER_TOO_SMALL;