Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjmedia/port.h> |
| 21 | #include <pjmedia/errno.h> |
| 22 | #include <pj/assert.h> |
| 23 | #include <pj/log.h> |
| 24 | #include <pj/pool.h> |
| 25 | |
| 26 | #define THIS_FILE "port.c" |
| 27 | |
| 28 | |
| 29 | /** |
| 30 | * This is an auxiliary function to initialize port info for |
| 31 | * ports which deal with PCM audio. |
| 32 | */ |
| 33 | PJ_DEF(pj_status_t) pjmedia_port_info_init( pjmedia_port_info *info, |
| 34 | const pj_str_t *name, |
| 35 | unsigned signature, |
| 36 | unsigned clock_rate, |
| 37 | unsigned channel_count, |
| 38 | unsigned bits_per_sample, |
| 39 | unsigned samples_per_frame) |
| 40 | { |
| 41 | #define USEC_IN_SEC (pj_uint64_t)1000000 |
| 42 | unsigned frame_time_usec, avg_bps; |
| 43 | |
| 44 | pj_bzero(info, sizeof(*info)); |
| 45 | |
| 46 | info->signature = signature; |
| 47 | info->dir = PJMEDIA_DIR_ENCODING_DECODING; |
| 48 | info->name = *name; |
| 49 | |
| 50 | frame_time_usec = (unsigned)(samples_per_frame * USEC_IN_SEC / |
| 51 | channel_count / clock_rate); |
| 52 | avg_bps = clock_rate * channel_count * bits_per_sample; |
| 53 | |
| 54 | pjmedia_format_init_audio(&info->fmt, PJMEDIA_FORMAT_L16, clock_rate, |
| 55 | channel_count, bits_per_sample, frame_time_usec, |
| 56 | avg_bps, avg_bps); |
| 57 | |
| 58 | return PJ_SUCCESS; |
| 59 | } |
| 60 | |
| 61 | PJ_DEF(pj_status_t) pjmedia_port_info_init2( pjmedia_port_info *info, |
| 62 | const pj_str_t *name, |
| 63 | unsigned signature, |
| 64 | pjmedia_dir dir, |
| 65 | const pjmedia_format *fmt) |
| 66 | { |
| 67 | pj_bzero(info, sizeof(*info)); |
| 68 | info->signature = signature; |
| 69 | info->dir = dir; |
| 70 | info->name = *name; |
| 71 | |
| 72 | pjmedia_format_copy(&info->fmt, fmt); |
| 73 | |
| 74 | return PJ_SUCCESS; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Get a clock source from the port. |
| 79 | */ |
| 80 | PJ_DEF(pjmedia_clock_src *) pjmedia_port_get_clock_src( pjmedia_port *port, |
| 81 | pjmedia_dir dir ) |
| 82 | { |
| 83 | if (port && port->get_clock_src) |
| 84 | return port->get_clock_src(port, dir); |
| 85 | else |
| 86 | return NULL; |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Get a frame from the port (and subsequent downstream ports). |
| 91 | */ |
| 92 | PJ_DEF(pj_status_t) pjmedia_port_get_frame( pjmedia_port *port, |
| 93 | pjmedia_frame *frame ) |
| 94 | { |
| 95 | PJ_ASSERT_RETURN(port && frame, PJ_EINVAL); |
| 96 | |
| 97 | if (port->get_frame) |
| 98 | return port->get_frame(port, frame); |
| 99 | else { |
| 100 | frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| 101 | return PJ_EINVALIDOP; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | |
| 106 | /** |
| 107 | * Put a frame to the port (and subsequent downstream ports). |
| 108 | */ |
| 109 | PJ_DEF(pj_status_t) pjmedia_port_put_frame( pjmedia_port *port, |
| 110 | pjmedia_frame *frame ) |
| 111 | { |
| 112 | PJ_ASSERT_RETURN(port && frame, PJ_EINVAL); |
| 113 | |
| 114 | if (port->put_frame) |
| 115 | return port->put_frame(port, frame); |
| 116 | else |
| 117 | return PJ_EINVALIDOP; |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Destroy port (and subsequent downstream ports) |
| 122 | */ |
| 123 | PJ_DEF(pj_status_t) pjmedia_port_destroy( pjmedia_port *port ) |
| 124 | { |
| 125 | pj_status_t status; |
| 126 | |
| 127 | PJ_ASSERT_RETURN(port, PJ_EINVAL); |
| 128 | |
| 129 | if (port->on_destroy) |
| 130 | status = port->on_destroy(port); |
| 131 | else |
| 132 | status = PJ_SUCCESS; |
| 133 | |
| 134 | return status; |
| 135 | } |
| 136 | |
| 137 | |
| 138 | |