From eaa4d06187e300b0a6187c6253edf573a3389ad8 Mon Sep 17 00:00:00 2001 From: Benny Prijono Date: Sun, 30 Mar 2008 08:58:58 +0000 Subject: More ticket #504: added missing new files! git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@1901 74dad513-b988-da41-8d7b-12977e46ad98 --- pjmedia/src/pjmedia/stereo_port.c | 207 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 pjmedia/src/pjmedia/stereo_port.c (limited to 'pjmedia/src') diff --git a/pjmedia/src/pjmedia/stereo_port.c b/pjmedia/src/pjmedia/stereo_port.c new file mode 100644 index 00000000..0e636420 --- /dev/null +++ b/pjmedia/src/pjmedia/stereo_port.c @@ -0,0 +1,207 @@ +/* $Id$ */ +/* + * Copyright (C) 2003-2007 Benny Prijono + * + * 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 +#include +#include +#include + + +#define SIGNATURE PJMEDIA_PORT_SIGNATURE('S','T','R','O') + + +struct stereo_port +{ + pjmedia_port base; + pjmedia_port *dn_port; + unsigned options; + pj_int16_t *put_buf; + pj_int16_t *get_buf; +}; + + + +static pj_status_t stereo_put_frame(pjmedia_port *this_port, + const pjmedia_frame *frame); +static pj_status_t stereo_get_frame(pjmedia_port *this_port, + pjmedia_frame *frame); +static pj_status_t stereo_destroy(pjmedia_port *this_port); + + + +PJ_DEF(pj_status_t) pjmedia_stereo_port_create( pj_pool_t *pool, + pjmedia_port *dn_port, + unsigned channel_count, + unsigned options, + pjmedia_port **p_port ) +{ + const pj_str_t name = pj_str("stereo"); + struct stereo_port *sport; + unsigned samples_per_frame; + + /* Validate arguments. */ + PJ_ASSERT_RETURN(pool && dn_port && channel_count && p_port, PJ_EINVAL); + + /* Only supports 16bit samples per frame */ + PJ_ASSERT_RETURN(dn_port->info.bits_per_sample == 16, PJMEDIA_ENCBITS); + + /* Validate channel counts */ + PJ_ASSERT_RETURN(((dn_port->info.channel_count>1 && channel_count==1) || + (dn_port->info.channel_count==1 && channel_count>1)), + PJ_EINVAL); + + /* Create and initialize port. */ + sport = PJ_POOL_ZALLOC_T(pool, struct stereo_port); + PJ_ASSERT_RETURN(sport != NULL, PJ_ENOMEM); + + samples_per_frame = dn_port->info.samples_per_frame * channel_count / + dn_port->info.channel_count; + + pjmedia_port_info_init(&sport->base.info, &name, SIGNATURE, + dn_port->info.clock_rate, + channel_count, + dn_port->info.bits_per_sample, + samples_per_frame); + + sport->dn_port = dn_port; + sport->options = options; + + /* We always need buffer for put_frame */ + sport->put_buf = (pj_int16_t*) + pj_pool_alloc(pool, dn_port->info.bytes_per_frame); + + /* See if we need buffer for get_frame */ + if (dn_port->info.channel_count > channel_count) { + sport->get_buf = (pj_int16_t*) + pj_pool_alloc(pool, dn_port->info.bytes_per_frame); + } + + /* Media port interface */ + sport->base.get_frame = &stereo_get_frame; + sport->base.put_frame = &stereo_put_frame; + sport->base.on_destroy = &stereo_destroy; + + + /* Done */ + *p_port = &sport->base; + + return PJ_SUCCESS; +} + +static pj_status_t stereo_put_frame(pjmedia_port *this_port, + const pjmedia_frame *frame) +{ + struct stereo_port *sport = (struct stereo_port*) this_port; + pjmedia_frame tmp_frame; + + /* Return if we don't have downstream port. */ + if (sport->dn_port == NULL) { + return PJ_SUCCESS; + } + + if (frame->type == PJMEDIA_FRAME_TYPE_AUDIO) { + tmp_frame.buf = sport->put_buf; + if (sport->dn_port->info.channel_count == 1) { + pjmedia_convert_channel_nto1(tmp_frame.buf, frame->buf, + sport->base.info.channel_count, + sport->base.info.samples_per_frame, + (sport->options & PJMEDIA_STEREO_MIX), + 0); + } else { + pjmedia_convert_channel_1ton(tmp_frame.buf, frame->buf, + sport->dn_port->info.channel_count, + sport->base.info.samples_per_frame, + sport->options); + } + tmp_frame.size = sport->dn_port->info.bytes_per_frame; + } else { + tmp_frame.buf = frame->buf; + tmp_frame.size = frame->size; + } + + tmp_frame.type = frame->type; + tmp_frame.timestamp.u64 = frame->timestamp.u64; + + return pjmedia_port_put_frame( sport->dn_port, &tmp_frame ); +} + + + +static pj_status_t stereo_get_frame(pjmedia_port *this_port, + pjmedia_frame *frame) +{ + struct stereo_port *sport = (struct stereo_port*) this_port; + pjmedia_frame tmp_frame; + pj_status_t status; + + /* Return silence if we don't have downstream port */ + if (sport->dn_port == NULL) { + pj_bzero(frame->buf, frame->size); + return PJ_SUCCESS; + } + + tmp_frame.buf = sport->get_buf? sport->get_buf : frame->buf; + tmp_frame.size = sport->dn_port->info.bytes_per_frame; + tmp_frame.timestamp.u64 = frame->timestamp.u64; + tmp_frame.type = PJMEDIA_FRAME_TYPE_AUDIO; + + status = pjmedia_port_get_frame( sport->dn_port, &tmp_frame); + if (status != PJ_SUCCESS) + return status; + + if (tmp_frame.type != PJMEDIA_FRAME_TYPE_AUDIO) { + frame->type = tmp_frame.type; + frame->timestamp = tmp_frame.timestamp; + frame->size = tmp_frame.size; + if (tmp_frame.size && tmp_frame.buf == sport->get_buf) + pj_memcpy(frame->buf, tmp_frame.buf, tmp_frame.size); + return PJ_SUCCESS; + } + + if (sport->base.info.channel_count == 1) { + pjmedia_convert_channel_nto1(frame->buf, tmp_frame.buf, + sport->dn_port->info.channel_count, + sport->dn_port->info.samples_per_frame, + (sport->options & PJMEDIA_STEREO_MIX), 0); + } else { + pjmedia_convert_channel_1ton(frame->buf, tmp_frame.buf, + sport->base.info.channel_count, + sport->dn_port->info.samples_per_frame, + sport->options); + } + + frame->size = sport->base.info.bytes_per_frame; + frame->type = PJMEDIA_FRAME_TYPE_AUDIO; + + return PJ_SUCCESS; +} + + +static pj_status_t stereo_destroy(pjmedia_port *this_port) +{ + struct stereo_port *sport = (struct stereo_port*) this_port; + + if ((sport->options & PJMEDIA_STEREO_DONT_DESTROY_DN)==0) { + pjmedia_port_destroy(sport->dn_port); + sport->dn_port = NULL; + } + + return PJ_SUCCESS; +} + -- cgit v1.2.3