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/*
* Copyright (c) 1993-1994 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and the Network Research Group at
* Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
static const char rcsid[] =
"@(#) $Header: /cs/research/mice/starship/src/local/CVS_repository/vic/decoder-scr.cc,v 1.1.1.1 1998/02/18 18:03:25 ucacsva Exp $ (LBL)";
#include <osfcn.h>
#include <string.h>
#include <sys/param.h>
#include "inet.h"
#include "packet.h"
#include "decoder.h"
#include "rcvr.h"
#include "bsd-endian.h"
#ifdef SCR_CODEC
class ScrReceiver : public Receiver {
public:
ScrReceiver(const nvhdr* ph);
virtual int recv(const rtphdr*, const u_char* data,
int len, int jitter);
};
class ScrDecoder : public PlaneDecoder {
public:
ScrDecoder(Receiver&);
protected:
void decode(const u_char* vh, const u_char* bp, int cc);
const u_char* decode_block(const u_char* data, const u_char* end);
int recv(rtphdr*, u_char* vh, u_char* pkt, int len, int jitter);
};
static class ScrReceiverMatcher : public ReceiverMatcher {
protected:
Receiver* match(int fmt, const u_char* vh) {
if (fmt == RTP_PT_SCR)
return (new ScrReceiver((const nvhdr*)vh));
else
return (0);
}
} rcvr_scr_;
static class ScrSoftwareDecoderMatcher : public SoftwareDecoderMatcher {
public:
ScrSoftwareDecoderMatcher() : SoftwareDecoderMatcher(RTP_PT_SCR) { }
protected:
SoftwareDecoder* create(Receiver& r) {
return (new ScrDecoder(r));
}
} swd_scr_;
#define STAT_BAD_GEOM 0
#define STAT_BAD_COORD 1
ScrReceiver::ScrReceiver(const nvhdr* ph) : Receiver(sizeof(*ph))
{
stat_[STAT_BAD_GEOM].name = "Scr-Bad-Geom";
stat_[STAT_BAD_COORD].name = "Scr-Bad-Coord";
nstat_ = 2;
inw_ = ntohs(ph->width) & 0x7fff;
inh_ = ntohs(ph->height);
if ((unsigned)inw_ > 1000 || (unsigned)inh_ > 1000) {
/*XXX*/
inw_ = 320;
inh_ = 240;
count(STAT_BAD_GEOM);
}
}
int ScrReceiver::recv(const rtphdr* rh, const u_char* data, int len, int jitter)
{
const nvhdr* ph = (nvhdr*)(rh + 1);
int w = ntohs(ph->width) & 0x7fff;
int h = ntohs(ph->height);
if (w != inw_ || h != inh_) {
if ((unsigned)w > 1000 || (unsigned)h > 1000) {
/*XXX*/
w = 320;
h = 240;
count(STAT_BAD_GEOM);
}
resize(w, h);
}
return (Receiver::recv(rh, data, len, jitter));
}
ScrDecoder::ScrDecoder(Receiver& r) : PlaneDecoder(r)
{
}
const u_char* ScrDecoder::decode_block(const u_char* bp, const u_char* end)
{
/*XXX check for whole block here*/
if (end - bp < 2)
return (end);
int x0 = bp[0];
int y0 = bp[1];
bp += 4;
int inw = rcvr_.width();
int inh = rcvr_.height();
if (x0 > inw / 8 || y0 >= inh / 8) {
/*XXX*/
return 0;
}
int width = rcvr_.width();
int offset = y0 * 8 * width + x0 * 8;
n_long* yp = (n_long*)&frm_[offset];
int s = inw * inh;/*XXX*/
u_char* up = frm_ + s + (offset >> 1);
u_char* vp = up + (s >> 1);
/*XXX*/
if (bp + 128 > end) {
/*XXX*/
return (end);
}
for (int i = 8; --i >= 0; ) {
yp[0] = *(u_int*)bp;
bp += 4;
yp[1] = *(u_int*)bp;
bp += 4;
if (up != 0) {
*(u_int*)up = *(u_int*)bp;
bp += 4;
*(u_int*)vp = *(u_int*)bp;
bp += 4;
up += width / 2 / sizeof(*up);
vp += width / 2 / sizeof(*vp);
}
yp += width / sizeof(*yp);
}
rvts_[RV_INDEX(x0, y0)] = now_;
return (bp);
}
void ScrDecoder::decode(const u_char* vh, const u_char* p, int len)
{
const u_char* end = p + len;
while (p < end && p != 0)
p = decode_block(p, end);
}
#endif
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