| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2009 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/master_port.h> |
| #include <pjmedia/clock.h> |
| #include <pjmedia/errno.h> |
| #include <pj/assert.h> |
| #include <pj/lock.h> |
| #include <pj/pool.h> |
| #include <pj/string.h> |
| |
| |
| struct pjmedia_master_port |
| { |
| unsigned options; |
| pjmedia_clock *clock; |
| pjmedia_port *u_port; |
| pjmedia_port *d_port; |
| unsigned buff_size; |
| void *buff; |
| pj_lock_t *lock; |
| }; |
| |
| |
| static void clock_callback(const pj_timestamp *ts, void *user_data); |
| |
| |
| /* |
| * Create a master port. |
| * |
| */ |
| PJ_DEF(pj_status_t) pjmedia_master_port_create( pj_pool_t *pool, |
| pjmedia_port *u_port, |
| pjmedia_port *d_port, |
| unsigned options, |
| pjmedia_master_port **p_m) |
| { |
| pjmedia_master_port *m; |
| unsigned clock_rate; |
| unsigned channel_count; |
| unsigned samples_per_frame; |
| unsigned bytes_per_frame; |
| pj_status_t status; |
| |
| /* Sanity check */ |
| PJ_ASSERT_RETURN(pool && u_port && d_port && p_m, PJ_EINVAL); |
| |
| |
| /* Both ports MUST have equal clock rate */ |
| PJ_ASSERT_RETURN(u_port->info.clock_rate == d_port->info.clock_rate, |
| PJMEDIA_ENCCLOCKRATE); |
| |
| /* Both ports MUST have equal samples per frame */ |
| PJ_ASSERT_RETURN(u_port->info.samples_per_frame== |
| d_port->info.samples_per_frame, |
| PJMEDIA_ENCSAMPLESPFRAME); |
| |
| /* Both ports MUST have equal channel count */ |
| PJ_ASSERT_RETURN(u_port->info.channel_count == d_port->info.channel_count, |
| PJMEDIA_ENCCHANNEL); |
| |
| |
| /* Get clock_rate and samples_per_frame from one of the port. */ |
| clock_rate = u_port->info.clock_rate; |
| samples_per_frame = u_port->info.samples_per_frame; |
| channel_count = u_port->info.channel_count; |
| |
| |
| /* Get the bytes_per_frame value, to determine the size of the |
| * buffer. We take the larger size of the two ports. |
| */ |
| bytes_per_frame = u_port->info.bytes_per_frame; |
| if (d_port->info.bytes_per_frame > bytes_per_frame) |
| bytes_per_frame = d_port->info.bytes_per_frame; |
| |
| |
| /* Create the master port instance */ |
| m = PJ_POOL_ZALLOC_T(pool, pjmedia_master_port); |
| m->options = options; |
| m->u_port = u_port; |
| m->d_port = d_port; |
| |
| |
| /* Create buffer */ |
| m->buff_size = bytes_per_frame; |
| m->buff = pj_pool_alloc(pool, m->buff_size); |
| if (!m->buff) |
| return PJ_ENOMEM; |
| |
| /* Create lock object */ |
| status = pj_lock_create_simple_mutex(pool, "mport", &m->lock); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| /* Create media clock */ |
| status = pjmedia_clock_create(pool, clock_rate, channel_count, |
| samples_per_frame, options, &clock_callback, |
| m, &m->clock); |
| if (status != PJ_SUCCESS) { |
| pj_lock_destroy(m->lock); |
| return status; |
| } |
| |
| /* Done */ |
| *p_m = m; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Start the media flow. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_master_port_start(pjmedia_master_port *m) |
| { |
| PJ_ASSERT_RETURN(m && m->clock, PJ_EINVAL); |
| PJ_ASSERT_RETURN(m->u_port && m->d_port, PJ_EINVALIDOP); |
| |
| return pjmedia_clock_start(m->clock); |
| } |
| |
| |
| /* |
| * Stop the media flow. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_master_port_stop(pjmedia_master_port *m) |
| { |
| PJ_ASSERT_RETURN(m && m->clock, PJ_EINVAL); |
| |
| return pjmedia_clock_stop(m->clock); |
| } |
| |
| |
| /* |
| * Callback to be called for each clock ticks. |
| */ |
| static void clock_callback(const pj_timestamp *ts, void *user_data) |
| { |
| pjmedia_master_port *m = (pjmedia_master_port*) user_data; |
| pjmedia_frame frame; |
| pj_status_t status; |
| |
| |
| /* Lock access to ports. */ |
| pj_lock_acquire(m->lock); |
| |
| /* Get frame from upstream port and pass it to downstream port */ |
| pj_bzero(&frame, sizeof(frame)); |
| frame.buf = m->buff; |
| frame.size = m->buff_size; |
| frame.timestamp.u64 = ts->u64; |
| |
| status = pjmedia_port_get_frame(m->u_port, &frame); |
| if (status != PJ_SUCCESS) |
| frame.type = PJMEDIA_FRAME_TYPE_NONE; |
| |
| status = pjmedia_port_put_frame(m->d_port, &frame); |
| |
| /* Get frame from downstream port and pass it to upstream port */ |
| pj_bzero(&frame, sizeof(frame)); |
| frame.buf = m->buff; |
| frame.size = m->buff_size; |
| frame.timestamp.u64 = ts->u64; |
| |
| status = pjmedia_port_get_frame(m->d_port, &frame); |
| if (status != PJ_SUCCESS) |
| frame.type = PJMEDIA_FRAME_TYPE_NONE; |
| |
| status = pjmedia_port_put_frame(m->u_port, &frame); |
| |
| /* Release lock */ |
| pj_lock_release(m->lock); |
| } |
| |
| |
| /* |
| * Change the upstream port. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_master_port_set_uport(pjmedia_master_port *m, |
| pjmedia_port *port) |
| { |
| PJ_ASSERT_RETURN(m && port, PJ_EINVAL); |
| |
| /* If we have downstream port, make sure they have matching samples per |
| * frame. |
| */ |
| if (m->d_port) { |
| PJ_ASSERT_RETURN( |
| port->info.clock_rate/port->info.samples_per_frame== |
| m->d_port->info.clock_rate/m->d_port->info.samples_per_frame, |
| PJMEDIA_ENCSAMPLESPFRAME |
| ); |
| } |
| |
| pj_lock_acquire(m->lock); |
| |
| m->u_port = port; |
| |
| pj_lock_release(m->lock); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Get the upstream port. |
| */ |
| PJ_DEF(pjmedia_port*) pjmedia_master_port_get_uport(pjmedia_master_port*m) |
| { |
| PJ_ASSERT_RETURN(m, NULL); |
| return m->u_port; |
| } |
| |
| |
| /* |
| * Change the downstream port. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_master_port_set_dport(pjmedia_master_port *m, |
| pjmedia_port *port) |
| { |
| PJ_ASSERT_RETURN(m && port, PJ_EINVAL); |
| |
| /* If we have upstream port, make sure they have matching samples per |
| * frame. |
| */ |
| if (m->u_port) { |
| PJ_ASSERT_RETURN( |
| port->info.clock_rate/port->info.samples_per_frame== |
| m->u_port->info.clock_rate/m->u_port->info.samples_per_frame, |
| PJMEDIA_ENCSAMPLESPFRAME |
| ); |
| } |
| |
| pj_lock_acquire(m->lock); |
| |
| m->d_port = port; |
| |
| pj_lock_release(m->lock); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Get the downstream port. |
| */ |
| PJ_DEF(pjmedia_port*) pjmedia_master_port_get_dport(pjmedia_master_port*m) |
| { |
| PJ_ASSERT_RETURN(m, NULL); |
| return m->d_port; |
| } |
| |
| |
| /* |
| * Destroy the master port, and optionally destroy the u_port and |
| * d_port ports. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_master_port_destroy(pjmedia_master_port *m, |
| pj_bool_t destroy_ports) |
| { |
| PJ_ASSERT_RETURN(m, PJ_EINVAL); |
| |
| if (m->clock) { |
| pjmedia_clock_destroy(m->clock); |
| m->clock = NULL; |
| } |
| |
| if (m->u_port && destroy_ports) { |
| pjmedia_port_destroy(m->u_port); |
| m->u_port = NULL; |
| } |
| |
| if (m->d_port && destroy_ports) { |
| pjmedia_port_destroy(m->d_port); |
| m->d_port = NULL; |
| } |
| |
| if (m->lock) { |
| pj_lock_destroy(m->lock); |
| m->lock = NULL; |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| |