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/echo_port.h> |
| 21 | #include <pjmedia/echo.h> |
| 22 | #include <pjmedia/errno.h> |
| 23 | #include <pj/assert.h> |
| 24 | #include <pj/log.h> |
| 25 | #include <pj/pool.h> |
| 26 | |
| 27 | |
| 28 | #define THIS_FILE "ec_port.c" |
| 29 | #define SIGNATURE PJMEDIA_SIG_PORT_ECHO |
| 30 | #define BUF_COUNT 32 |
| 31 | |
| 32 | struct ec |
| 33 | { |
| 34 | pjmedia_port base; |
| 35 | pjmedia_port *dn_port; |
| 36 | pjmedia_echo_state *ec; |
| 37 | }; |
| 38 | |
| 39 | |
| 40 | static pj_status_t ec_put_frame(pjmedia_port *this_port, |
| 41 | pjmedia_frame *frame); |
| 42 | static pj_status_t ec_get_frame(pjmedia_port *this_port, |
| 43 | pjmedia_frame *frame); |
| 44 | static pj_status_t ec_on_destroy(pjmedia_port *this_port); |
| 45 | |
| 46 | |
| 47 | PJ_DEF(pj_status_t) pjmedia_echo_port_create(pj_pool_t *pool, |
| 48 | pjmedia_port *dn_port, |
| 49 | unsigned tail_ms, |
| 50 | unsigned latency_ms, |
| 51 | unsigned options, |
| 52 | pjmedia_port **p_port ) |
| 53 | { |
| 54 | const pj_str_t AEC = { "EC", 2 }; |
| 55 | pjmedia_audio_format_detail *afd; |
| 56 | struct ec *ec; |
| 57 | pj_status_t status; |
| 58 | |
| 59 | PJ_ASSERT_RETURN(pool && dn_port && p_port, PJ_EINVAL); |
| 60 | |
| 61 | afd = pjmedia_format_get_audio_format_detail(&dn_port->info.fmt, PJ_TRUE); |
| 62 | |
| 63 | PJ_ASSERT_RETURN(afd->bits_per_sample==16 && tail_ms, |
| 64 | PJ_EINVAL); |
| 65 | |
| 66 | /* Create the port and the AEC itself */ |
| 67 | ec = PJ_POOL_ZALLOC_T(pool, struct ec); |
| 68 | |
| 69 | pjmedia_port_info_init(&ec->base.info, &AEC, SIGNATURE, |
| 70 | afd->clock_rate, |
| 71 | afd->channel_count, |
| 72 | afd->bits_per_sample, |
| 73 | PJMEDIA_AFD_SPF(afd)); |
| 74 | |
| 75 | status = pjmedia_echo_create2(pool, afd->clock_rate, |
| 76 | afd->channel_count, |
| 77 | PJMEDIA_AFD_SPF(afd), |
| 78 | tail_ms, latency_ms, options, &ec->ec); |
| 79 | if (status != PJ_SUCCESS) |
| 80 | return status; |
| 81 | |
| 82 | /* More init */ |
| 83 | ec->dn_port = dn_port; |
| 84 | ec->base.get_frame = &ec_get_frame; |
| 85 | ec->base.put_frame = &ec_put_frame; |
| 86 | ec->base.on_destroy = &ec_on_destroy; |
| 87 | |
| 88 | /* Done */ |
| 89 | *p_port = &ec->base; |
| 90 | |
| 91 | return PJ_SUCCESS; |
| 92 | } |
| 93 | |
| 94 | |
| 95 | static pj_status_t ec_put_frame( pjmedia_port *this_port, |
| 96 | pjmedia_frame *frame) |
| 97 | { |
| 98 | struct ec *ec = (struct ec*)this_port; |
| 99 | |
| 100 | PJ_ASSERT_RETURN(this_port->info.signature == SIGNATURE, PJ_EINVAL); |
| 101 | |
| 102 | if (frame->type == PJMEDIA_FRAME_TYPE_NONE ) { |
| 103 | return pjmedia_port_put_frame(ec->dn_port, frame); |
| 104 | } |
| 105 | |
| 106 | PJ_ASSERT_RETURN(frame->size == PJMEDIA_PIA_AVG_FSZ(&this_port->info), |
| 107 | PJ_EINVAL); |
| 108 | |
| 109 | pjmedia_echo_capture(ec->ec, (pj_int16_t*)frame->buf, 0); |
| 110 | |
| 111 | return pjmedia_port_put_frame(ec->dn_port, frame); |
| 112 | } |
| 113 | |
| 114 | |
| 115 | static pj_status_t ec_get_frame( pjmedia_port *this_port, |
| 116 | pjmedia_frame *frame) |
| 117 | { |
| 118 | struct ec *ec = (struct ec*)this_port; |
| 119 | pj_status_t status; |
| 120 | |
| 121 | PJ_ASSERT_RETURN(this_port->info.signature == SIGNATURE, PJ_EINVAL); |
| 122 | |
| 123 | status = pjmedia_port_get_frame(ec->dn_port, frame); |
| 124 | if (status!=PJ_SUCCESS || frame->type!=PJMEDIA_FRAME_TYPE_AUDIO) { |
| 125 | pjmedia_zero_samples((pj_int16_t*)frame->buf, |
| 126 | PJMEDIA_PIA_SPF(&this_port->info)); |
| 127 | } |
| 128 | |
| 129 | pjmedia_echo_playback(ec->ec, (pj_int16_t*)frame->buf); |
| 130 | |
| 131 | return status; |
| 132 | } |
| 133 | |
| 134 | |
| 135 | static pj_status_t ec_on_destroy(pjmedia_port *this_port) |
| 136 | { |
| 137 | struct ec *ec = (struct ec*)this_port; |
| 138 | |
| 139 | PJ_ASSERT_RETURN(this_port->info.signature == SIGNATURE, PJ_EINVAL); |
| 140 | |
| 141 | pjmedia_echo_destroy(ec->ec); |
| 142 | |
| 143 | return PJ_SUCCESS; |
| 144 | } |
| 145 | |
| 146 | |