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Diffstat (limited to 'pjmedia/src/pjmedia/port.c')
| -rw-r--r-- | pjmedia/src/pjmedia/port.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia/port.c b/pjmedia/src/pjmedia/port.c new file mode 100644 index 0000000..b38b718 --- /dev/null +++ b/pjmedia/src/pjmedia/port.c @@ -0,0 +1,138 @@ +/* $Id: port.c 3893 2011-12-01 10:49:07Z ming $ */ +/* + * Copyright (C) 2008-2011 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/port.h> +#include <pjmedia/errno.h> +#include <pj/assert.h> +#include <pj/log.h> +#include <pj/pool.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) +{ +#define USEC_IN_SEC (pj_uint64_t)1000000 + unsigned frame_time_usec, avg_bps; + + pj_bzero(info, sizeof(*info)); + + info->signature = signature; + info->dir = PJMEDIA_DIR_ENCODING_DECODING; + info->name = *name; + + frame_time_usec = (unsigned)(samples_per_frame * USEC_IN_SEC / + channel_count / clock_rate); + avg_bps = clock_rate * channel_count * bits_per_sample; + + pjmedia_format_init_audio(&info->fmt, PJMEDIA_FORMAT_L16, clock_rate, + channel_count, bits_per_sample, frame_time_usec, + avg_bps, avg_bps); + + return PJ_SUCCESS; +} + +PJ_DEF(pj_status_t) pjmedia_port_info_init2( pjmedia_port_info *info, + const pj_str_t *name, + unsigned signature, + pjmedia_dir dir, + const pjmedia_format *fmt) +{ + pj_bzero(info, sizeof(*info)); + info->signature = signature; + info->dir = dir; + info->name = *name; + + pjmedia_format_copy(&info->fmt, fmt); + + return PJ_SUCCESS; +} + +/** + * Get a clock source from the port. + */ +PJ_DEF(pjmedia_clock_src *) pjmedia_port_get_clock_src( pjmedia_port *port, + pjmedia_dir dir ) +{ + if (port && port->get_clock_src) + return port->get_clock_src(port, dir); + else + return NULL; +} + +/** + * 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, + 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; +} + + + |