| /* $Id$ */ |
| /* |
| * 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/port.h> |
| #include <pjmedia/errno.h> |
| #include <pj/assert.h> |
| #include <pj/log.h> |
| #include <pj/pool.h> |
| |
| #define THIS_FILE "port.c" |
| |
| |
| /** |
| * This is an auxiliary function to initialize port info for |
| * ports which deal with PCM audio. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_port_info_init( pjmedia_port_info *info, |
| const pj_str_t *name, |
| unsigned signature, |
| unsigned clock_rate, |
| unsigned channel_count, |
| unsigned bits_per_sample, |
| unsigned samples_per_frame) |
| { |
| #define USEC_IN_SEC (pj_uint64_t)1000000 |
| unsigned frame_time_usec, avg_bps; |
| |
| pj_bzero(info, sizeof(*info)); |
| |
| info->signature = signature; |
| info->dir = PJMEDIA_DIR_ENCODING_DECODING; |
| info->name = *name; |
| |
| frame_time_usec = (unsigned)(samples_per_frame * USEC_IN_SEC / |
| channel_count / clock_rate); |
| avg_bps = clock_rate * channel_count * bits_per_sample; |
| |
| pjmedia_format_init_audio(&info->fmt, PJMEDIA_FORMAT_L16, clock_rate, |
| channel_count, bits_per_sample, frame_time_usec, |
| avg_bps, avg_bps); |
| |
| return PJ_SUCCESS; |
| } |
| |
| PJ_DEF(pj_status_t) pjmedia_port_info_init2( pjmedia_port_info *info, |
| const pj_str_t *name, |
| unsigned signature, |
| pjmedia_dir dir, |
| const pjmedia_format *fmt) |
| { |
| pj_bzero(info, sizeof(*info)); |
| info->signature = signature; |
| info->dir = dir; |
| info->name = *name; |
| |
| pjmedia_format_copy(&info->fmt, fmt); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /** |
| * Get a clock source from the port. |
| */ |
| PJ_DEF(pjmedia_clock_src *) pjmedia_port_get_clock_src( pjmedia_port *port, |
| pjmedia_dir dir ) |
| { |
| if (port && port->get_clock_src) |
| return port->get_clock_src(port, dir); |
| else |
| return NULL; |
| } |
| |
| /** |
| * Get a frame from the port (and subsequent downstream ports). |
| */ |
| PJ_DEF(pj_status_t) pjmedia_port_get_frame( pjmedia_port *port, |
| pjmedia_frame *frame ) |
| { |
| PJ_ASSERT_RETURN(port && frame, PJ_EINVAL); |
| |
| if (port->get_frame) |
| return port->get_frame(port, frame); |
| else { |
| frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| return PJ_EINVALIDOP; |
| } |
| } |
| |
| |
| /** |
| * Put a frame to the port (and subsequent downstream ports). |
| */ |
| PJ_DEF(pj_status_t) pjmedia_port_put_frame( pjmedia_port *port, |
| pjmedia_frame *frame ) |
| { |
| PJ_ASSERT_RETURN(port && frame, PJ_EINVAL); |
| |
| if (port->put_frame) |
| return port->put_frame(port, frame); |
| else |
| return PJ_EINVALIDOP; |
| } |
| |
| /** |
| * Destroy port (and subsequent downstream ports) |
| */ |
| PJ_DEF(pj_status_t) pjmedia_port_destroy( pjmedia_port *port ) |
| { |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(port, PJ_EINVAL); |
| |
| if (port->on_destroy) |
| status = port->on_destroy(port); |
| else |
| status = PJ_SUCCESS; |
| |
| return status; |
| } |
| |
| |
| |