eden-emu/opus
19
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Bit of cleaning up in the byte dumping part. Making use of any remaining bit(s)

Browse source 
to do error detection in the decoder.
This commit is contained in:
Jean-Marc Valin 2008-01-27 17:34:35 +11:00
parent a2fd116d16
commit 94d4ea9305
3 changed files with 35 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

54
libcelt/celt.c
View file

@ -379,28 +379,32 @@ int celt_encode(CELTEncoder *st, short *pcm, unsigned char *compressed, int nbCo
}
}
/* Not sure why, but filling the rest with zeros tends to help */
while (ec_enc_tell(&st->enc, 0) < nbCompressedBytes*8)
ec_enc_uint(&st->enc, 0, 2);
//printf ("%d\n", ec_enc_tell(&st->enc, 0)-8*nbCompressedBytes);
/* Finishing the stream with a 0101... pattern so that the decoder can check is everything's right */
{
int val = 0;
while (ec_enc_tell(&st->enc, 0) < nbCompressedBytes*8)
{
ec_enc_uint(&st->enc, val, 2);
val = 1-val;
}
}
ec_enc_done(&st->enc);
{
unsigned char *data;
int nbBytes = ec_byte_bytes(&st->buf);
if (nbBytes > nbCompressedBytes)
if (nbBytes != nbCompressedBytes)
{
celt_warning("got too many bytes");
if (nbBytes > nbCompressedBytes)
celt_warning("got too many bytes");
else
celt_warning("not enough bytes");
return CELT_INTERNAL_ERROR;
}
//printf ("%d\n", *nbBytes);
data = ec_byte_get_buffer(&st->buf);
for (i=0;i<nbBytes;i++)
compressed[i] = data[i];
/* Fill the last byte with the right pattern so the decoder doesn't get confused
if the encoder didn't return enough bytes */
/* FIXME: This isn't quite what the decoder expects, but it's the best we can do for now */
for (;i<nbCompressedBytes;i++)
compressed[i] = 0x00;
}
/* Reset the packing for the next encoding */
ec_byte_reset(&st->buf);
@ -409,21 +413,6 @@ int celt_encode(CELTEncoder *st, short *pcm, unsigned char *compressed, int nbCo
return nbCompressedBytes;
}
char *celt_encoder_get_bytes(CELTEncoder *st, int *nbBytes)
{
char *data;
ec_enc_done(&st->enc);
*nbBytes = ec_byte_bytes(&st->buf);
data = ec_byte_get_buffer(&st->buf);
//printf ("%d\n", *nbBytes);
/* Reset the packing for the next encoding */
ec_byte_reset(&st->buf);
ec_enc_init(&st->enc,&st->buf);
return data;
}
/****************************************************************************/
/* */
@ -640,6 +629,19 @@ int celt_decode(CELTDecoder *st, char *data, int len, short *pcm)
}
}
{
int val = 0;
while (ec_dec_tell(&dec, 0) < len*8)
{
if (ec_dec_uint(&dec, 2) != val)
{
celt_warning("decode error");
return CELT_CORRUPTED_DATA;
}
val = 1-val;
}
}
return 0;
//printf ("\n");
}