forked from len0rd/rockbox
349 lines
9.7 KiB
C
349 lines
9.7 KiB
C
/* Copyright (c) 2011 Xiph.Org Foundation
|
|
Written by Jean-Marc Valin */
|
|
/*
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
|
|
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "opus.h"
|
|
#include "opus_private.h"
|
|
#include "os_support.h"
|
|
|
|
|
|
int opus_repacketizer_get_size(void)
|
|
{
|
|
return sizeof(OpusRepacketizer);
|
|
}
|
|
|
|
OpusRepacketizer *opus_repacketizer_init(OpusRepacketizer *rp)
|
|
{
|
|
rp->nb_frames = 0;
|
|
return rp;
|
|
}
|
|
|
|
OpusRepacketizer *opus_repacketizer_create(void)
|
|
{
|
|
OpusRepacketizer *rp;
|
|
rp=(OpusRepacketizer *)opus_alloc(opus_repacketizer_get_size());
|
|
if(rp==NULL)return NULL;
|
|
return opus_repacketizer_init(rp);
|
|
}
|
|
|
|
void opus_repacketizer_destroy(OpusRepacketizer *rp)
|
|
{
|
|
opus_free(rp);
|
|
}
|
|
|
|
static int opus_repacketizer_cat_impl(OpusRepacketizer *rp, const unsigned char *data, opus_int32 len, int self_delimited)
|
|
{
|
|
unsigned char tmp_toc;
|
|
int curr_nb_frames,ret;
|
|
/* Set of check ToC */
|
|
if (len<1) return OPUS_INVALID_PACKET;
|
|
if (rp->nb_frames == 0)
|
|
{
|
|
rp->toc = data[0];
|
|
rp->framesize = opus_packet_get_samples_per_frame(data, 8000);
|
|
} else if ((rp->toc&0xFC) != (data[0]&0xFC))
|
|
{
|
|
/*fprintf(stderr, "toc mismatch: 0x%x vs 0x%x\n", rp->toc, data[0]);*/
|
|
return OPUS_INVALID_PACKET;
|
|
}
|
|
curr_nb_frames = opus_packet_get_nb_frames(data, len);
|
|
if(curr_nb_frames<1) return OPUS_INVALID_PACKET;
|
|
|
|
/* Check the 120 ms maximum packet size */
|
|
if ((curr_nb_frames+rp->nb_frames)*rp->framesize > 960)
|
|
{
|
|
return OPUS_INVALID_PACKET;
|
|
}
|
|
|
|
ret=opus_packet_parse_impl(data, len, self_delimited, &tmp_toc, &rp->frames[rp->nb_frames], &rp->len[rp->nb_frames], NULL, NULL);
|
|
if(ret<1)return ret;
|
|
|
|
rp->nb_frames += curr_nb_frames;
|
|
return OPUS_OK;
|
|
}
|
|
|
|
int opus_repacketizer_cat(OpusRepacketizer *rp, const unsigned char *data, opus_int32 len)
|
|
{
|
|
return opus_repacketizer_cat_impl(rp, data, len, 0);
|
|
}
|
|
|
|
int opus_repacketizer_get_nb_frames(OpusRepacketizer *rp)
|
|
{
|
|
return rp->nb_frames;
|
|
}
|
|
|
|
opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int end,
|
|
unsigned char *data, opus_int32 maxlen, int self_delimited, int pad)
|
|
{
|
|
int i, count;
|
|
opus_int32 tot_size;
|
|
opus_int16 *len;
|
|
const unsigned char **frames;
|
|
unsigned char * ptr;
|
|
|
|
if (begin<0 || begin>=end || end>rp->nb_frames)
|
|
{
|
|
/*fprintf(stderr, "%d %d %d\n", begin, end, rp->nb_frames);*/
|
|
return OPUS_BAD_ARG;
|
|
}
|
|
count = end-begin;
|
|
|
|
len = rp->len+begin;
|
|
frames = rp->frames+begin;
|
|
if (self_delimited)
|
|
tot_size = 1 + (len[count-1]>=252);
|
|
else
|
|
tot_size = 0;
|
|
|
|
ptr = data;
|
|
if (count==1)
|
|
{
|
|
/* Code 0 */
|
|
tot_size += len[0]+1;
|
|
if (tot_size > maxlen)
|
|
return OPUS_BUFFER_TOO_SMALL;
|
|
*ptr++ = rp->toc&0xFC;
|
|
} else if (count==2)
|
|
{
|
|
if (len[1] == len[0])
|
|
{
|
|
/* Code 1 */
|
|
tot_size += 2*len[0]+1;
|
|
if (tot_size > maxlen)
|
|
return OPUS_BUFFER_TOO_SMALL;
|
|
*ptr++ = (rp->toc&0xFC) | 0x1;
|
|
} else {
|
|
/* Code 2 */
|
|
tot_size += len[0]+len[1]+2+(len[0]>=252);
|
|
if (tot_size > maxlen)
|
|
return OPUS_BUFFER_TOO_SMALL;
|
|
*ptr++ = (rp->toc&0xFC) | 0x2;
|
|
ptr += encode_size(len[0], ptr);
|
|
}
|
|
}
|
|
if (count > 2 || (pad && tot_size < maxlen))
|
|
{
|
|
/* Code 3 */
|
|
int vbr;
|
|
int pad_amount=0;
|
|
|
|
/* Restart the process for the padding case */
|
|
ptr = data;
|
|
if (self_delimited)
|
|
tot_size = 1 + (len[count-1]>=252);
|
|
else
|
|
tot_size = 0;
|
|
vbr = 0;
|
|
for (i=1;i<count;i++)
|
|
{
|
|
if (len[i] != len[0])
|
|
{
|
|
vbr=1;
|
|
break;
|
|
}
|
|
}
|
|
if (vbr)
|
|
{
|
|
tot_size += 2;
|
|
for (i=0;i<count-1;i++)
|
|
tot_size += 1 + (len[i]>=252) + len[i];
|
|
tot_size += len[count-1];
|
|
|
|
if (tot_size > maxlen)
|
|
return OPUS_BUFFER_TOO_SMALL;
|
|
*ptr++ = (rp->toc&0xFC) | 0x3;
|
|
*ptr++ = count | 0x80;
|
|
} else {
|
|
tot_size += count*len[0]+2;
|
|
if (tot_size > maxlen)
|
|
return OPUS_BUFFER_TOO_SMALL;
|
|
*ptr++ = (rp->toc&0xFC) | 0x3;
|
|
*ptr++ = count;
|
|
}
|
|
pad_amount = pad ? (maxlen-tot_size) : 0;
|
|
if (pad_amount != 0)
|
|
{
|
|
int nb_255s;
|
|
data[1] |= 0x40;
|
|
nb_255s = (pad_amount-1)/255;
|
|
for (i=0;i<nb_255s;i++)
|
|
*ptr++ = 255;
|
|
*ptr++ = pad_amount-255*nb_255s-1;
|
|
tot_size += pad_amount;
|
|
}
|
|
if (vbr)
|
|
{
|
|
for (i=0;i<count-1;i++)
|
|
ptr += encode_size(len[i], ptr);
|
|
}
|
|
}
|
|
if (self_delimited) {
|
|
int sdlen = encode_size(len[count-1], ptr);
|
|
ptr += sdlen;
|
|
}
|
|
/* Copy the actual data */
|
|
for (i=0;i<count;i++)
|
|
{
|
|
/* Using OPUS_MOVE() instead of OPUS_COPY() in case we're doing in-place
|
|
padding from opus_packet_pad or opus_packet_unpad(). */
|
|
/* assert disabled because it's not valid in C. */
|
|
/* celt_assert(frames[i] + len[i] <= data || ptr <= frames[i]); */
|
|
OPUS_MOVE(ptr, frames[i], len[i]);
|
|
ptr += len[i];
|
|
}
|
|
if (pad)
|
|
{
|
|
/* Fill padding with zeros. */
|
|
while (ptr<data+maxlen)
|
|
*ptr++=0;
|
|
}
|
|
return tot_size;
|
|
}
|
|
|
|
opus_int32 opus_repacketizer_out_range(OpusRepacketizer *rp, int begin, int end, unsigned char *data, opus_int32 maxlen)
|
|
{
|
|
return opus_repacketizer_out_range_impl(rp, begin, end, data, maxlen, 0, 0);
|
|
}
|
|
|
|
opus_int32 opus_repacketizer_out(OpusRepacketizer *rp, unsigned char *data, opus_int32 maxlen)
|
|
{
|
|
return opus_repacketizer_out_range_impl(rp, 0, rp->nb_frames, data, maxlen, 0, 0);
|
|
}
|
|
|
|
int opus_packet_pad(unsigned char *data, opus_int32 len, opus_int32 new_len)
|
|
{
|
|
OpusRepacketizer rp;
|
|
opus_int32 ret;
|
|
if (len < 1)
|
|
return OPUS_BAD_ARG;
|
|
if (len==new_len)
|
|
return OPUS_OK;
|
|
else if (len > new_len)
|
|
return OPUS_BAD_ARG;
|
|
opus_repacketizer_init(&rp);
|
|
/* Moving payload to the end of the packet so we can do in-place padding */
|
|
OPUS_MOVE(data+new_len-len, data, len);
|
|
ret = opus_repacketizer_cat(&rp, data+new_len-len, len);
|
|
if (ret != OPUS_OK)
|
|
return ret;
|
|
ret = opus_repacketizer_out_range_impl(&rp, 0, rp.nb_frames, data, new_len, 0, 1);
|
|
if (ret > 0)
|
|
return OPUS_OK;
|
|
else
|
|
return ret;
|
|
}
|
|
|
|
opus_int32 opus_packet_unpad(unsigned char *data, opus_int32 len)
|
|
{
|
|
OpusRepacketizer rp;
|
|
opus_int32 ret;
|
|
if (len < 1)
|
|
return OPUS_BAD_ARG;
|
|
opus_repacketizer_init(&rp);
|
|
ret = opus_repacketizer_cat(&rp, data, len);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = opus_repacketizer_out_range_impl(&rp, 0, rp.nb_frames, data, len, 0, 0);
|
|
celt_assert(ret > 0 && ret <= len);
|
|
return ret;
|
|
}
|
|
|
|
int opus_multistream_packet_pad(unsigned char *data, opus_int32 len, opus_int32 new_len, int nb_streams)
|
|
{
|
|
int s;
|
|
int count;
|
|
unsigned char toc;
|
|
opus_int16 size[48];
|
|
opus_int32 packet_offset;
|
|
opus_int32 amount;
|
|
|
|
if (len < 1)
|
|
return OPUS_BAD_ARG;
|
|
if (len==new_len)
|
|
return OPUS_OK;
|
|
else if (len > new_len)
|
|
return OPUS_BAD_ARG;
|
|
amount = new_len - len;
|
|
/* Seek to last stream */
|
|
for (s=0;s<nb_streams-1;s++)
|
|
{
|
|
if (len<=0)
|
|
return OPUS_INVALID_PACKET;
|
|
count = opus_packet_parse_impl(data, len, 1, &toc, NULL,
|
|
size, NULL, &packet_offset);
|
|
if (count<0)
|
|
return count;
|
|
data += packet_offset;
|
|
len -= packet_offset;
|
|
}
|
|
return opus_packet_pad(data, len, len+amount);
|
|
}
|
|
|
|
opus_int32 opus_multistream_packet_unpad(unsigned char *data, opus_int32 len, int nb_streams)
|
|
{
|
|
int s;
|
|
unsigned char toc;
|
|
opus_int16 size[48];
|
|
opus_int32 packet_offset;
|
|
OpusRepacketizer rp;
|
|
unsigned char *dst;
|
|
opus_int32 dst_len;
|
|
|
|
if (len < 1)
|
|
return OPUS_BAD_ARG;
|
|
dst = data;
|
|
dst_len = 0;
|
|
/* Unpad all frames */
|
|
for (s=0;s<nb_streams;s++)
|
|
{
|
|
opus_int32 ret;
|
|
int self_delimited = s!=nb_streams-1;
|
|
if (len<=0)
|
|
return OPUS_INVALID_PACKET;
|
|
opus_repacketizer_init(&rp);
|
|
ret = opus_packet_parse_impl(data, len, self_delimited, &toc, NULL,
|
|
size, NULL, &packet_offset);
|
|
if (ret<0)
|
|
return ret;
|
|
ret = opus_repacketizer_cat_impl(&rp, data, packet_offset, self_delimited);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = opus_repacketizer_out_range_impl(&rp, 0, rp.nb_frames, dst, len, self_delimited, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
else
|
|
dst_len += ret;
|
|
dst += ret;
|
|
data += packet_offset;
|
|
len -= packet_offset;
|
|
}
|
|
return dst_len;
|
|
}
|
|
|