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#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <err.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/application.h>
#include <openbsc/debug.h>
#include <openbsc/gsm_data.h>
#include <openbsc/mgcp.h>
#include <openbsc/mgcp_internal.h>
#include "bscconfig.h"
#ifndef BUILD_MGCP_TRANSCODING
#error "Requires MGCP transcoding enabled (see --enable-mgcp-transcoding)"
#endif
#include "src/osmo-bsc_mgcp/mgcp_transcode.h"
static int audio_name_to_type(const char *name)
{
if (!strcasecmp(name, "gsm"))
return 3;
#ifdef HAVE_BCG729
else if (!strcasecmp(name, "g729"))
return 18;
#endif
else if (!strcasecmp(name, "pcma"))
return 8;
else if (!strcasecmp(name, "l16"))
return 11;
return -1;
}
int mgcp_get_trans_frame_size(void *state_, int nsamples, int dst);
int main(int argc, char **argv)
{
char buf[4096] = {0};
int cc, rc;
struct mgcp_rtp_end dst_end = {0};
struct mgcp_rtp_end src_end = {0};
struct mgcp_trunk_config tcfg = {{0}};
struct mgcp_endpoint endp = {0};
struct mgcp_process_rtp_state *state;
int in_size;
osmo_init_logging(&log_info);
tcfg.endpoints = &endp;
tcfg.number_endpoints = 1;
endp.tcfg = &tcfg;
if (argc <= 2)
errx(1, "Usage: {gsm|g729|pcma|l16} {gsm|g729|pcma|l16}");
if ((src_end.payload_type = audio_name_to_type(argv[1])) == -1)
errx(1, "invalid input format '%s'", argv[1]);
if ((dst_end.payload_type = audio_name_to_type(argv[2])) == -1)
errx(1, "invalid output format '%s'", argv[2]);
rc = mgcp_transcoding_setup(&endp, &dst_end, &src_end);
if (rc < 0)
errx(1, "setup failed: %s", strerror(-rc));
state = dst_end.rtp_process_data;
OSMO_ASSERT(state != NULL);
in_size = mgcp_transcoding_get_frame_size(state, 160, 0);
OSMO_ASSERT(sizeof(buf) >= in_size + 12);
while ((cc = read(0, buf + 12, in_size))) {
if (cc != in_size)
err(1, "read");
cc += 12; /* include RTP header */
rc = mgcp_transcoding_process_rtp(&endp, &dst_end,
buf, &cc, sizeof(buf));
if (rc < 0)
errx(1, "processing failed: %s", strerror(-rc));
cc -= 12; /* ignore RTP header */
if (write(1, buf + 12, cc) != cc)
err(1, "write");
}
return 0;
}
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