diff options
Diffstat (limited to 'pjmedia/src/pjmedia/echo_port.c')
| -rw-r--r-- | pjmedia/src/pjmedia/echo_port.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia/echo_port.c b/pjmedia/src/pjmedia/echo_port.c new file mode 100644 index 0000000..7b1eb98 --- /dev/null +++ b/pjmedia/src/pjmedia/echo_port.c @@ -0,0 +1,146 @@ +/* $Id: echo_port.c 3664 2011-07-19 03:42:28Z nanang $ */ +/* + * 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; +} + + |