ref: 78b4e76a28ea52d9993c657e0d2a3aeed05c6f25
dir: /src/diag_range.c/
/* Copyright (C)2012 Xiph.Org Foundation
Copyright (C)2012 Gregory Maxwell
Copyright (C)2012 Jean-Marc Valin
File: diag_range.c
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 FOUNDATION 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
#ifdef _WIN32
#define I64FORMAT "I64d"
#define I64uFORMAT "I64u"
#else
#define I64FORMAT "lld"
#define I64uFORMAT "llu"
#endif
#include <stdio.h>
#include <opus.h>
#include "diag_range.h"
/*This is some non-exported code copied wholesale from libopus.
*Normal programs shouldn't need these functions, but we use them here
*to parse deep inside multichannel packets in order to get diagnostic
*data for save-range. If you're thinking about copying it and you aren't
*making an opus stream diagnostic tool, you're probably doing something
*wrong.*/
static int parse_size(const unsigned char *data, opus_int32 len, short *size)
{
if (len<1)
{
*size = -1;
return -1;
} else if (data[0]<252)
{
*size = data[0];
return 1;
} else if (len<2)
{
*size = -1;
return -1;
} else {
*size = 4*data[1] + data[0];
return 2;
}
}
static int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
int self_delimited, unsigned char *out_toc,
const unsigned char *frames[48], short size[48], int *payload_offset)
{
int i, bytes;
int count;
int cbr;
unsigned char ch, toc;
int framesize;
int last_size;
const unsigned char *data0 = data;
if (size==NULL)
return OPUS_BAD_ARG;
framesize = opus_packet_get_samples_per_frame(data, 48000);
cbr = 0;
toc = *data++;
len--;
last_size = len;
switch (toc&0x3)
{
/* One frame */
case 0:
count=1;
break;
/* Two CBR frames */
case 1:
count=2;
cbr = 1;
if (!self_delimited)
{
if (len&0x1)
return OPUS_INVALID_PACKET;
size[0] = last_size = len/2;
}
break;
/* Two VBR frames */
case 2:
count = 2;
bytes = parse_size(data, len, size);
len -= bytes;
if (size[0]<0 || size[0] > len)
return OPUS_INVALID_PACKET;
data += bytes;
last_size = len-size[0];
break;
/* Multiple CBR/VBR frames (from 0 to 120 ms) */
case 3:
if (len<1)
return OPUS_INVALID_PACKET;
/* Number of frames encoded in bits 0 to 5 */
ch = *data++;
count = ch&0x3F;
if (count <= 0 || framesize*count > 5760)
return OPUS_INVALID_PACKET;
len--;
/* Padding flag is bit 6 */
if (ch&0x40)
{
int padding=0;
int p;
do {
if (len<=0)
return OPUS_INVALID_PACKET;
p = *data++;
len--;
padding += p==255 ? 254: p;
} while (p==255);
len -= padding;
}
if (len<0)
return OPUS_INVALID_PACKET;
/* VBR flag is bit 7 */
cbr = !(ch&0x80);
if (!cbr)
{
/* VBR case */
last_size = len;
for (i=0;i<count-1;i++)
{
bytes = parse_size(data, len, size+i);
len -= bytes;
if (size[i]<0 || size[i] > len)
return OPUS_INVALID_PACKET;
data += bytes;
last_size -= bytes+size[i];
}
if (last_size<0)
return OPUS_INVALID_PACKET;
} else if (!self_delimited)
{
/* CBR case */
last_size = len/count;
if (last_size*count!=len)
return OPUS_INVALID_PACKET;
for (i=0;i<count-1;i++)
size[i] = last_size;
}
break;
}
/* Self-delimited framing has an extra size for the last frame. */
if (self_delimited)
{
bytes = parse_size(data, len, size+count-1);
len -= bytes;
if (size[count-1]<0 || size[count-1] > len)
return OPUS_INVALID_PACKET;
data += bytes;
/* For CBR packets, apply the size to all the frames. */
if (cbr)
{
if (size[count-1]*count > len)
return OPUS_INVALID_PACKET;
for (i=0;i<count-1;i++)
size[i] = size[count-1];
} else if(size[count-1] > last_size)
return OPUS_INVALID_PACKET;
} else
{
/* Because it's not encoded explicitly, it's possible the size of the
last packet (or all the packets, for the CBR case) is larger than
1275. Reject them here.*/
if (last_size > 1275)
return OPUS_INVALID_PACKET;
size[count-1] = last_size;
}
if (frames)
{
for (i=0;i<count;i++)
{
frames[i] = data;
data += size[i];
}
}
if (out_toc)
*out_toc = toc;
if (payload_offset)
*payload_offset = data-data0;
return count;
}
void save_range(FILE *frange, int frame_size, unsigned char *packet, int nbBytes, opus_uint32 *rngs, int nb_streams){
int i, parsed_size;
const unsigned char *subpkt;
static const char *bw_strings[5]={"NB","MB","WB","SWB","FB"};
static const char *mode_strings[3]={"LP","HYB","MDCT"};
fprintf(frange,"%d, %d, ",frame_size,nbBytes);
subpkt=packet;
parsed_size=nbBytes;
for(i=0;i<nb_streams;i++){
int j,payload_offset,nf;
const unsigned char *frames[48];
unsigned char toc;
short size[48];
payload_offset=0;
nf=opus_packet_parse_impl(subpkt,parsed_size,i+1!=nb_streams,
&toc,frames,size,&payload_offset);
fprintf(frange,"[[%d",(int)(frames[0]-subpkt));
for(j=0;j<nf;j++)fprintf(frange,", %d",size[j]);
fprintf(frange,"], %s, %s, %c, %d",
mode_strings[((((subpkt[0]>>3)+48)&92)+4)>>5],
bw_strings[opus_packet_get_bandwidth(subpkt)-OPUS_BANDWIDTH_NARROWBAND],
subpkt[0]&4?'S':'M',opus_packet_get_samples_per_frame(subpkt,48000));
fprintf(frange,", %" I64uFORMAT "]%s",(unsigned long long)rngs[i],i+1==nb_streams?"\n":", ");
parsed_size-=payload_offset;
subpkt+=payload_offset;
}
}