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/* $Id$ */
/*
* Copyright (C) 2003-2007 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/port.h>
#include <pjmedia/errno.h>
#include <pj/assert.h>
#include <pj/log.h>
#define THIS_FILE "port.c"
/**
* This is an auxiliary function to initialize port info for
* ports which deal with PCM audio.
*/
PJ_DEF(pj_status_t) pjmedia_port_info_init( pjmedia_port_info *info,
const pj_str_t *name,
unsigned signature,
unsigned clock_rate,
unsigned channel_count,
unsigned bits_per_sample,
unsigned samples_per_frame)
{
pj_bzero(info, sizeof(*info));
info->name = *name;
info->signature = signature;
info->type = PJMEDIA_TYPE_AUDIO;
info->has_info = PJ_TRUE;
info->need_info = PJ_FALSE;
info->pt = 0xFF;
info->encoding_name = pj_str("pcm");
info->clock_rate = clock_rate;
info->channel_count = channel_count;
info->bits_per_sample = bits_per_sample;
info->samples_per_frame = samples_per_frame;
info->bytes_per_frame = samples_per_frame * bits_per_sample / 8;
return PJ_SUCCESS;
}
/**
* Get a frame from the port (and subsequent downstream ports).
*/
PJ_DEF(pj_status_t) pjmedia_port_get_frame( pjmedia_port *port,
pjmedia_frame *frame )
{
PJ_ASSERT_RETURN(port && frame, PJ_EINVAL);
if (port->get_frame)
return port->get_frame(port, frame);
else {
frame->type = PJMEDIA_FRAME_TYPE_NONE;
return PJ_EINVALIDOP;
}
}
/**
* Put a frame to the port (and subsequent downstream ports).
*/
PJ_DEF(pj_status_t) pjmedia_port_put_frame( pjmedia_port *port,
const pjmedia_frame *frame )
{
PJ_ASSERT_RETURN(port && frame, PJ_EINVAL);
if (port->put_frame)
return port->put_frame(port, frame);
else
return PJ_EINVALIDOP;
}
/**
* Destroy port (and subsequent downstream ports)
*/
PJ_DEF(pj_status_t) pjmedia_port_destroy( pjmedia_port *port )
{
pj_status_t status;
PJ_ASSERT_RETURN(port, PJ_EINVAL);
if (port->on_destroy)
status = port->on_destroy(port);
else
status = PJ_SUCCESS;
return status;
}
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