| /* $Id$ */ |
| /* |
| * 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/null_port.h> |
| #include <pjmedia/errno.h> |
| #include <pj/assert.h> |
| #include <pj/pool.h> |
| #include <pj/string.h> |
| |
| |
| #define SIGNATURE PJMEDIA_SIG_PORT_NULL |
| |
| static pj_status_t null_get_frame(pjmedia_port *this_port, |
| pjmedia_frame *frame); |
| static pj_status_t null_put_frame(pjmedia_port *this_port, |
| pjmedia_frame *frame); |
| static pj_status_t null_on_destroy(pjmedia_port *this_port); |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_null_port_create( pj_pool_t *pool, |
| unsigned sampling_rate, |
| unsigned channel_count, |
| unsigned samples_per_frame, |
| unsigned bits_per_sample, |
| pjmedia_port **p_port ) |
| { |
| pjmedia_port *port; |
| const pj_str_t name = pj_str("null-port"); |
| |
| PJ_ASSERT_RETURN(pool && p_port, PJ_EINVAL); |
| |
| port = PJ_POOL_ZALLOC_T(pool, pjmedia_port); |
| PJ_ASSERT_RETURN(port != NULL, PJ_ENOMEM); |
| |
| pjmedia_port_info_init(&port->info, &name, SIGNATURE, sampling_rate, |
| channel_count, bits_per_sample, samples_per_frame); |
| |
| port->get_frame = &null_get_frame; |
| port->put_frame = &null_put_frame; |
| port->on_destroy = &null_on_destroy; |
| |
| |
| *p_port = port; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| |
| /* |
| * Put frame to file. |
| */ |
| static pj_status_t null_put_frame(pjmedia_port *this_port, |
| pjmedia_frame *frame) |
| { |
| PJ_UNUSED_ARG(this_port); |
| PJ_UNUSED_ARG(frame); |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Get frame from file. |
| */ |
| static pj_status_t null_get_frame(pjmedia_port *this_port, |
| pjmedia_frame *frame) |
| { |
| frame->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| frame->size = PJMEDIA_PIA_AVG_FSZ(&this_port->info); |
| frame->timestamp.u32.lo += PJMEDIA_PIA_SPF(&this_port->info); |
| pjmedia_zero_samples((pj_int16_t*)frame->buf, |
| PJMEDIA_PIA_SPF(&this_port->info)); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Destroy port. |
| */ |
| static pj_status_t null_on_destroy(pjmedia_port *this_port) |
| { |
| PJ_UNUSED_ARG(this_port); |
| return PJ_SUCCESS; |
| } |