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Viewing changes to daemon/libs/pjproject-2.0.1/pjmedia/src/pjmedia/null_port.c

  • Committer: Jackson Doak
  • Date: 2013-07-10 21:04:46 UTC
  • mfrom: (20.1.3 sid)
  • Revision ID: noskcaj@ubuntu.com-20130710210446-y8f587vza807icr9
https://launchpad.net/bugs/1196978
Properly merged from upstream.

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daemon/libs/pjproject-2.0.1/pjmedia/src/pjmedia/null_port.c
 
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/* $Id: null_port.c 3664 2011-07-19 03:42:28Z nanang $ */
 
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/*
 
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 * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
 
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 * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify
 
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 * it under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation; either version 2 of the License, or
 
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 * (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program; if not, write to the Free Software
 
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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 */
 
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#include <pjmedia/null_port.h>
 
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#include <pjmedia/errno.h>
 
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#include <pj/assert.h>
 
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#include <pj/pool.h>
 
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#include <pj/string.h>
 
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#define SIGNATURE   PJMEDIA_SIG_PORT_NULL
 
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static pj_status_t null_get_frame(pjmedia_port *this_port,
 
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                                  pjmedia_frame *frame);
 
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static pj_status_t null_put_frame(pjmedia_port *this_port,
 
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                                  pjmedia_frame *frame);
 
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static pj_status_t null_on_destroy(pjmedia_port *this_port);
 
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PJ_DEF(pj_status_t) pjmedia_null_port_create( pj_pool_t *pool,
 
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                                              unsigned sampling_rate,
 
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                                              unsigned channel_count,
 
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                                              unsigned samples_per_frame,
 
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                                              unsigned bits_per_sample,
 
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                                              pjmedia_port **p_port )
 
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{
 
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    pjmedia_port *port;
 
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    const pj_str_t name = pj_str("null-port");
 
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    PJ_ASSERT_RETURN(pool && p_port, PJ_EINVAL);
 
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    port = PJ_POOL_ZALLOC_T(pool, pjmedia_port);
 
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    PJ_ASSERT_RETURN(pool != NULL, PJ_ENOMEM);
 
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    pjmedia_port_info_init(&port->info, &name, SIGNATURE, sampling_rate,
 
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                           channel_count, bits_per_sample, samples_per_frame);
 
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    port->get_frame = &null_get_frame;
 
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    port->put_frame = &null_put_frame;
 
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    port->on_destroy = &null_on_destroy;
 
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    *p_port = port;
 
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    return PJ_SUCCESS;
 
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}
 
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/*
 
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 * Put frame to file.
 
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 */
 
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static pj_status_t null_put_frame(pjmedia_port *this_port,
 
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                                  pjmedia_frame *frame)
 
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{
 
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    PJ_UNUSED_ARG(this_port);
 
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    PJ_UNUSED_ARG(frame);
 
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    return PJ_SUCCESS;
 
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}
 
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/*
 
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 * Get frame from file.
 
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 */
 
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static pj_status_t null_get_frame(pjmedia_port *this_port,
 
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                                  pjmedia_frame *frame)
 
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{
 
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    frame->type = PJMEDIA_FRAME_TYPE_AUDIO;
 
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    frame->size = PJMEDIA_PIA_AVG_FSZ(&this_port->info);
 
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    frame->timestamp.u32.lo += PJMEDIA_PIA_SPF(&this_port->info);
 
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    pjmedia_zero_samples((pj_int16_t*)frame->buf,
 
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                          PJMEDIA_PIA_SPF(&this_port->info));
 
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    return PJ_SUCCESS;
 
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}
 
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/*
 
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 * Destroy port.
 
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 */
 
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static pj_status_t null_on_destroy(pjmedia_port *this_port)
 
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{
 
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    PJ_UNUSED_ARG(this_port);
 
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    return PJ_SUCCESS;
 
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}