Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [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/master_port.h> |
| 21 | #include <pjmedia/clock.h> |
| 22 | #include <pjmedia/errno.h> |
| 23 | #include <pj/assert.h> |
| 24 | #include <pj/lock.h> |
| 25 | #include <pj/pool.h> |
| 26 | #include <pj/string.h> |
| 27 | |
| 28 | |
| 29 | struct pjmedia_master_port |
| 30 | { |
| 31 | unsigned options; |
| 32 | pjmedia_clock *clock; |
| 33 | pjmedia_port *u_port; |
| 34 | pjmedia_port *d_port; |
| 35 | unsigned buff_size; |
| 36 | void *buff; |
| 37 | pj_lock_t *lock; |
| 38 | }; |
| 39 | |
| 40 | |
| 41 | static void clock_callback(const pj_timestamp *ts, void *user_data); |
| 42 | |
| 43 | |
| 44 | /* |
| 45 | * Create a master port. |
| 46 | * |
| 47 | */ |
| 48 | PJ_DEF(pj_status_t) pjmedia_master_port_create( pj_pool_t *pool, |
| 49 | pjmedia_port *u_port, |
| 50 | pjmedia_port *d_port, |
| 51 | unsigned options, |
| 52 | pjmedia_master_port **p_m) |
| 53 | { |
| 54 | pjmedia_master_port *m; |
| 55 | unsigned clock_rate; |
| 56 | unsigned channel_count; |
| 57 | unsigned samples_per_frame; |
| 58 | unsigned bytes_per_frame; |
| 59 | pjmedia_audio_format_detail *u_afd, *d_afd; |
| 60 | pj_status_t status; |
| 61 | |
| 62 | /* Sanity check */ |
| 63 | PJ_ASSERT_RETURN(pool && u_port && d_port && p_m, PJ_EINVAL); |
| 64 | |
| 65 | u_afd = pjmedia_format_get_audio_format_detail(&u_port->info.fmt, PJ_TRUE); |
| 66 | d_afd = pjmedia_format_get_audio_format_detail(&d_port->info.fmt, PJ_TRUE); |
| 67 | |
| 68 | /* Both ports MUST have equal clock rate */ |
| 69 | PJ_ASSERT_RETURN(u_afd->clock_rate == d_afd->clock_rate, |
| 70 | PJMEDIA_ENCCLOCKRATE); |
| 71 | |
| 72 | /* Both ports MUST have equal samples per frame */ |
| 73 | PJ_ASSERT_RETURN(PJMEDIA_PIA_SPF(&u_port->info)== |
| 74 | PJMEDIA_PIA_SPF(&d_port->info), |
| 75 | PJMEDIA_ENCSAMPLESPFRAME); |
| 76 | |
| 77 | /* Both ports MUST have equal channel count */ |
| 78 | PJ_ASSERT_RETURN(u_afd->channel_count == d_afd->channel_count, |
| 79 | PJMEDIA_ENCCHANNEL); |
| 80 | |
| 81 | |
| 82 | /* Get clock_rate and samples_per_frame from one of the port. */ |
| 83 | clock_rate = u_afd->clock_rate; |
| 84 | samples_per_frame = PJMEDIA_PIA_SPF(&u_port->info); |
| 85 | channel_count = u_afd->channel_count; |
| 86 | |
| 87 | |
| 88 | /* Get the bytes_per_frame value, to determine the size of the |
| 89 | * buffer. We take the larger size of the two ports. |
| 90 | */ |
| 91 | bytes_per_frame = PJMEDIA_AFD_AVG_FSZ(u_afd); |
| 92 | if (PJMEDIA_AFD_AVG_FSZ(d_afd) > bytes_per_frame) |
| 93 | bytes_per_frame = PJMEDIA_AFD_AVG_FSZ(d_afd); |
| 94 | |
| 95 | |
| 96 | /* Create the master port instance */ |
| 97 | m = PJ_POOL_ZALLOC_T(pool, pjmedia_master_port); |
| 98 | m->options = options; |
| 99 | m->u_port = u_port; |
| 100 | m->d_port = d_port; |
| 101 | |
| 102 | |
| 103 | /* Create buffer */ |
| 104 | m->buff_size = bytes_per_frame; |
| 105 | m->buff = pj_pool_alloc(pool, m->buff_size); |
| 106 | if (!m->buff) |
| 107 | return PJ_ENOMEM; |
| 108 | |
| 109 | /* Create lock object */ |
| 110 | status = pj_lock_create_simple_mutex(pool, "mport", &m->lock); |
| 111 | if (status != PJ_SUCCESS) |
| 112 | return status; |
| 113 | |
| 114 | /* Create media clock */ |
| 115 | status = pjmedia_clock_create(pool, clock_rate, channel_count, |
| 116 | samples_per_frame, options, &clock_callback, |
| 117 | m, &m->clock); |
| 118 | if (status != PJ_SUCCESS) { |
| 119 | pj_lock_destroy(m->lock); |
| 120 | return status; |
| 121 | } |
| 122 | |
| 123 | /* Done */ |
| 124 | *p_m = m; |
| 125 | |
| 126 | return PJ_SUCCESS; |
| 127 | } |
| 128 | |
| 129 | |
| 130 | /* |
| 131 | * Start the media flow. |
| 132 | */ |
| 133 | PJ_DEF(pj_status_t) pjmedia_master_port_start(pjmedia_master_port *m) |
| 134 | { |
| 135 | PJ_ASSERT_RETURN(m && m->clock, PJ_EINVAL); |
| 136 | PJ_ASSERT_RETURN(m->u_port && m->d_port, PJ_EINVALIDOP); |
| 137 | |
| 138 | return pjmedia_clock_start(m->clock); |
| 139 | } |
| 140 | |
| 141 | |
| 142 | /* |
| 143 | * Stop the media flow. |
| 144 | */ |
| 145 | PJ_DEF(pj_status_t) pjmedia_master_port_stop(pjmedia_master_port *m) |
| 146 | { |
| 147 | PJ_ASSERT_RETURN(m && m->clock, PJ_EINVAL); |
| 148 | |
| 149 | return pjmedia_clock_stop(m->clock); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | /* Poll the master port clock */ |
| 154 | PJ_DEF(pj_bool_t) pjmedia_master_port_wait( pjmedia_master_port *m, |
| 155 | pj_bool_t wait, |
| 156 | pj_timestamp *ts) |
| 157 | { |
| 158 | PJ_ASSERT_RETURN(m && m->clock, PJ_FALSE); |
| 159 | |
| 160 | return pjmedia_clock_wait(m->clock, wait, ts); |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * Callback to be called for each clock ticks. |
| 165 | */ |
| 166 | static void clock_callback(const pj_timestamp *ts, void *user_data) |
| 167 | { |
| 168 | pjmedia_master_port *m = (pjmedia_master_port*) user_data; |
| 169 | pjmedia_frame frame; |
| 170 | pj_status_t status; |
| 171 | |
| 172 | |
| 173 | /* Lock access to ports. */ |
| 174 | pj_lock_acquire(m->lock); |
| 175 | |
| 176 | /* Get frame from upstream port and pass it to downstream port */ |
| 177 | pj_bzero(&frame, sizeof(frame)); |
| 178 | frame.buf = m->buff; |
| 179 | frame.size = m->buff_size; |
| 180 | frame.timestamp.u64 = ts->u64; |
| 181 | |
| 182 | status = pjmedia_port_get_frame(m->u_port, &frame); |
| 183 | if (status != PJ_SUCCESS) |
| 184 | frame.type = PJMEDIA_FRAME_TYPE_NONE; |
| 185 | |
| 186 | status = pjmedia_port_put_frame(m->d_port, &frame); |
| 187 | |
| 188 | /* Get frame from downstream port and pass it to upstream port */ |
| 189 | pj_bzero(&frame, sizeof(frame)); |
| 190 | frame.buf = m->buff; |
| 191 | frame.size = m->buff_size; |
| 192 | frame.timestamp.u64 = ts->u64; |
| 193 | |
| 194 | status = pjmedia_port_get_frame(m->d_port, &frame); |
| 195 | if (status != PJ_SUCCESS) |
| 196 | frame.type = PJMEDIA_FRAME_TYPE_NONE; |
| 197 | |
| 198 | status = pjmedia_port_put_frame(m->u_port, &frame); |
| 199 | |
| 200 | /* Release lock */ |
| 201 | pj_lock_release(m->lock); |
| 202 | } |
| 203 | |
| 204 | |
| 205 | /* |
| 206 | * Change the upstream port. |
| 207 | */ |
| 208 | PJ_DEF(pj_status_t) pjmedia_master_port_set_uport(pjmedia_master_port *m, |
| 209 | pjmedia_port *port) |
| 210 | { |
| 211 | PJ_ASSERT_RETURN(m && port, PJ_EINVAL); |
| 212 | |
| 213 | /* Only supports audio for now */ |
| 214 | PJ_ASSERT_RETURN(port->info.fmt.type==PJMEDIA_TYPE_AUDIO, PJ_ENOTSUP); |
| 215 | |
| 216 | /* If we have downstream port, make sure they have matching samples per |
| 217 | * frame. |
| 218 | */ |
| 219 | if (m->d_port) { |
| 220 | PJ_ASSERT_RETURN( |
| 221 | PJMEDIA_PIA_PTIME(&port->info) == |
| 222 | PJMEDIA_PIA_PTIME(&m->d_port->info), |
| 223 | PJMEDIA_ENCSAMPLESPFRAME |
| 224 | ); |
| 225 | } |
| 226 | |
| 227 | pj_lock_acquire(m->lock); |
| 228 | |
| 229 | m->u_port = port; |
| 230 | |
| 231 | pj_lock_release(m->lock); |
| 232 | |
| 233 | return PJ_SUCCESS; |
| 234 | } |
| 235 | |
| 236 | |
| 237 | /* |
| 238 | * Get the upstream port. |
| 239 | */ |
| 240 | PJ_DEF(pjmedia_port*) pjmedia_master_port_get_uport(pjmedia_master_port*m) |
| 241 | { |
| 242 | PJ_ASSERT_RETURN(m, NULL); |
| 243 | return m->u_port; |
| 244 | } |
| 245 | |
| 246 | |
| 247 | /* |
| 248 | * Change the downstream port. |
| 249 | */ |
| 250 | PJ_DEF(pj_status_t) pjmedia_master_port_set_dport(pjmedia_master_port *m, |
| 251 | pjmedia_port *port) |
| 252 | { |
| 253 | PJ_ASSERT_RETURN(m && port, PJ_EINVAL); |
| 254 | |
| 255 | /* Only supports audio for now */ |
| 256 | PJ_ASSERT_RETURN(port->info.fmt.type==PJMEDIA_TYPE_AUDIO, PJ_ENOTSUP); |
| 257 | |
| 258 | /* If we have upstream port, make sure they have matching samples per |
| 259 | * frame. |
| 260 | */ |
| 261 | if (m->u_port) { |
| 262 | PJ_ASSERT_RETURN( |
| 263 | PJMEDIA_PIA_PTIME(&port->info) == |
| 264 | PJMEDIA_PIA_PTIME(&m->u_port->info), |
| 265 | PJMEDIA_ENCSAMPLESPFRAME |
| 266 | ); |
| 267 | } |
| 268 | |
| 269 | pj_lock_acquire(m->lock); |
| 270 | |
| 271 | m->d_port = port; |
| 272 | |
| 273 | pj_lock_release(m->lock); |
| 274 | |
| 275 | return PJ_SUCCESS; |
| 276 | } |
| 277 | |
| 278 | |
| 279 | /* |
| 280 | * Get the downstream port. |
| 281 | */ |
| 282 | PJ_DEF(pjmedia_port*) pjmedia_master_port_get_dport(pjmedia_master_port*m) |
| 283 | { |
| 284 | PJ_ASSERT_RETURN(m, NULL); |
| 285 | return m->d_port; |
| 286 | } |
| 287 | |
| 288 | |
| 289 | /* |
| 290 | * Destroy the master port, and optionally destroy the u_port and |
| 291 | * d_port ports. |
| 292 | */ |
| 293 | PJ_DEF(pj_status_t) pjmedia_master_port_destroy(pjmedia_master_port *m, |
| 294 | pj_bool_t destroy_ports) |
| 295 | { |
| 296 | PJ_ASSERT_RETURN(m, PJ_EINVAL); |
| 297 | |
| 298 | if (m->clock) { |
| 299 | pjmedia_clock_destroy(m->clock); |
| 300 | m->clock = NULL; |
| 301 | } |
| 302 | |
| 303 | if (m->u_port && destroy_ports) { |
| 304 | pjmedia_port_destroy(m->u_port); |
| 305 | m->u_port = NULL; |
| 306 | } |
| 307 | |
| 308 | if (m->d_port && destroy_ports) { |
| 309 | pjmedia_port_destroy(m->d_port); |
| 310 | m->d_port = NULL; |
| 311 | } |
| 312 | |
| 313 | if (m->lock) { |
| 314 | pj_lock_destroy(m->lock); |
| 315 | m->lock = NULL; |
| 316 | } |
| 317 | |
| 318 | return PJ_SUCCESS; |
| 319 | } |
| 320 | |
| 321 | |