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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
* rtp_profile_l16.cc
*
* Mon Dec 23 14:36:50 CET 2013
* Copyright 2013 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of lrtp.
*
* lrtp is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* lrtp is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with lrtp; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "rtp_profile_l16.h"
#include "rtp_profile.h"
#include <stdio.h>
#include <string.h>
// For ntoh et al.
#ifdef WIN32
#include <winsock2.h>
#else
#include <arpa/inet.h>
#endif
struct lrtp_profile_l16_t {
struct lrtp_profile_t profile; // 'Inherit' lrtp_profile_t
unsigned short int pkg_size;
unsigned int num_channels;
bool little_endian;
};
int profile_l16_pack(struct lrtp_profile_t *profile,
const char *frame, size_t framesize,
RTP &rtp)
{
struct lrtp_profile_l16_t *p = (struct lrtp_profile_l16_t *)profile;
size_t cpsamples = p->pkg_size;
// Calculate complete sample-channel tuples in frame.
size_t num_samples = framesize / (sizeof(short) * p->num_channels);
if(cpsamples > num_samples) cpsamples = num_samples;
// Convert to bytes
size_t cpsz = cpsamples * sizeof(short) * p->num_channels;
if(p->little_endian) {
short *buf = (short*)malloc(cpsz / sizeof(short));
for(size_t i = 0; i < cpsz / sizeof(short); i++) {
buf[i] = htons(((const short*)frame)[i]);
}
rtp.setPayload((char*)buf, cpsz);
free(buf);
} else {
rtp.setPayload(frame, cpsz);
}
return cpsz;
}
int profile_l16_unpack(struct lrtp_profile_t *profile,
const RTP &rtp,
oframelist_t &framelist)
{
struct lrtp_profile_l16_t *p = (struct lrtp_profile_l16_t *)profile;
outputframe_t *of = new outputframe_t();
of->size = rtp.payloadSize();
char *buf = (char*)malloc(of->size);
if(p->little_endian) {
const short *frame = (const short *)rtp.payloadData();
for(size_t i = 0; i < of->size / sizeof(short); i++) {
((short*)buf)[i] = ntohs(frame[i]);
}
} else {
of->size = rtp.payload(buf, of->size);
}
of->data = buf;
framelist.push_back(of);
return 0;
}
void profile_l16_destroy(struct lrtp_profile_t *profile)
{
struct lrtp_profile_l16_t *p = (struct lrtp_profile_l16_t *)profile;
delete p;
}
struct lrtp_profile_t *profile_l16_create(struct lrtp_t *lrtp,
unsigned int csrc,
va_list vp)
{
struct lrtp_profile_l16_t *p = new struct lrtp_profile_l16_t;
p->profile.pack = profile_l16_pack;
p->profile.unpack = profile_l16_unpack;
p->profile.destroy = profile_l16_destroy;
p->pkg_size = 1024;
p->little_endian = false;
p->num_channels = 1;
while(true) {
int type = va_arg(vp, int);
if(type == OPTION_END) break;
switch(type) {
case OPTION_L16_SAMPLES_PER_CHANNEL_PER_PACKET:
p->pkg_size = va_arg(vp, int);
break;
case OPTION_L16_CHANNELS:
p->num_channels = va_arg(vp, int);
break;
case OPTION_L16_LITTLE_ENDIAN:
p->little_endian = va_arg(vp, int);
break;
default:
// TODO: Unknown arg type
break;
}
}
return &p->profile;
}
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