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/* $Id$ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pjmedia/echo_port.h>
#include <pjmedia/echo.h>
#include <pjmedia/errno.h>
#include <pj/assert.h>
#include <pj/log.h>
#include <pj/pool.h>
#define THIS_FILE "ec_port.c"
#define SIGNATURE PJMEDIA_SIG_PORT_ECHO
#define BUF_COUNT 32
struct ec
{
pjmedia_port base;
pjmedia_port *dn_port;
pjmedia_echo_state *ec;
};
static pj_status_t ec_put_frame(pjmedia_port *this_port,
pjmedia_frame *frame);
static pj_status_t ec_get_frame(pjmedia_port *this_port,
pjmedia_frame *frame);
static pj_status_t ec_on_destroy(pjmedia_port *this_port);
PJ_DEF(pj_status_t) pjmedia_echo_port_create(pj_pool_t *pool,
pjmedia_port *dn_port,
unsigned tail_ms,
unsigned latency_ms,
unsigned options,
pjmedia_port **p_port )
{
const pj_str_t AEC = { "EC", 2 };
pjmedia_audio_format_detail *afd;
struct ec *ec;
pj_status_t status;
PJ_ASSERT_RETURN(pool && dn_port && p_port, PJ_EINVAL);
afd = pjmedia_format_get_audio_format_detail(&dn_port->info.fmt, PJ_TRUE);
PJ_ASSERT_RETURN(afd->bits_per_sample==16 && tail_ms,
PJ_EINVAL);
/* Create the port and the AEC itself */
ec = PJ_POOL_ZALLOC_T(pool, struct ec);
pjmedia_port_info_init(&ec->base.info, &AEC, SIGNATURE,
afd->clock_rate,
afd->channel_count,
afd->bits_per_sample,
PJMEDIA_AFD_SPF(afd));
status = pjmedia_echo_create2(pool, afd->clock_rate,
afd->channel_count,
PJMEDIA_AFD_SPF(afd),
tail_ms, latency_ms, options, &ec->ec);
if (status != PJ_SUCCESS)
return status;
/* More init */
ec->dn_port = dn_port;
ec->base.get_frame = &ec_get_frame;
ec->base.put_frame = &ec_put_frame;
ec->base.on_destroy = &ec_on_destroy;
/* Done */
*p_port = &ec->base;
return PJ_SUCCESS;
}
static pj_status_t ec_put_frame( pjmedia_port *this_port,
pjmedia_frame *frame)
{
struct ec *ec = (struct ec*)this_port;
PJ_ASSERT_RETURN(this_port->info.signature == SIGNATURE, PJ_EINVAL);
if (frame->type == PJMEDIA_FRAME_TYPE_NONE ) {
return pjmedia_port_put_frame(ec->dn_port, frame);
}
PJ_ASSERT_RETURN(frame->size == PJMEDIA_PIA_AVG_FSZ(&this_port->info),
PJ_EINVAL);
pjmedia_echo_capture(ec->ec, (pj_int16_t*)frame->buf, 0);
return pjmedia_port_put_frame(ec->dn_port, frame);
}
static pj_status_t ec_get_frame( pjmedia_port *this_port,
pjmedia_frame *frame)
{
struct ec *ec = (struct ec*)this_port;
pj_status_t status;
PJ_ASSERT_RETURN(this_port->info.signature == SIGNATURE, PJ_EINVAL);
status = pjmedia_port_get_frame(ec->dn_port, frame);
if (status!=PJ_SUCCESS || frame->type!=PJMEDIA_FRAME_TYPE_AUDIO) {
pjmedia_zero_samples((pj_int16_t*)frame->buf,
PJMEDIA_PIA_SPF(&this_port->info));
}
pjmedia_echo_playback(ec->ec, (pj_int16_t*)frame->buf);
return status;
}
static pj_status_t ec_on_destroy(pjmedia_port *this_port)
{
struct ec *ec = (struct ec*)this_port;
PJ_ASSERT_RETURN(this_port->info.signature == SIGNATURE, PJ_EINVAL);
pjmedia_echo_destroy(ec->ec);
return PJ_SUCCESS;
}
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