| /* $Id$ */ |
| /* |
| * 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/stereo.h> |
| #include <pj/assert.h> |
| #include <pj/pool.h> |
| #include <pj/string.h> |
| |
| |
| #define SIGNATURE PJMEDIA_SIG_PORT_STEREO |
| |
| |
| 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, |
| 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(PJMEDIA_PIA_BITS(&dn_port->info) == 16, |
| PJMEDIA_ENCBITS); |
| |
| /* Validate channel counts */ |
| PJ_ASSERT_RETURN(((PJMEDIA_PIA_CCNT(&dn_port->info)>1 && |
| channel_count==1) || |
| (PJMEDIA_PIA_CCNT(&dn_port->info)==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 = PJMEDIA_PIA_SPF(&dn_port->info) * channel_count / |
| PJMEDIA_PIA_CCNT(&dn_port->info); |
| |
| pjmedia_port_info_init(&sport->base.info, &name, SIGNATURE, |
| PJMEDIA_PIA_SRATE(&dn_port->info), |
| channel_count, |
| PJMEDIA_PIA_BITS(&dn_port->info), |
| 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, |
| PJMEDIA_PIA_AVG_FSZ(&dn_port->info)); |
| |
| /* See if we need buffer for get_frame */ |
| if (PJMEDIA_PIA_CCNT(&dn_port->info) > channel_count) { |
| sport->get_buf = (pj_int16_t*) |
| pj_pool_alloc(pool, |
| PJMEDIA_PIA_AVG_FSZ(&dn_port->info)); |
| } |
| |
| /* 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, |
| pjmedia_frame *frame) |
| { |
| struct stereo_port *sport = (struct stereo_port*) this_port; |
| const pjmedia_audio_format_detail *s_afd, *dn_afd; |
| pjmedia_frame tmp_frame; |
| |
| /* Return if we don't have downstream port. */ |
| if (sport->dn_port == NULL) { |
| return PJ_SUCCESS; |
| } |
| |
| s_afd = pjmedia_format_get_audio_format_detail(&this_port->info.fmt, 1); |
| dn_afd = pjmedia_format_get_audio_format_detail(&sport->dn_port->info.fmt, |
| 1); |
| |
| if (frame->type == PJMEDIA_FRAME_TYPE_AUDIO) { |
| tmp_frame.buf = sport->put_buf; |
| if (dn_afd->channel_count == 1) { |
| pjmedia_convert_channel_nto1((pj_int16_t*)tmp_frame.buf, |
| (const pj_int16_t*)frame->buf, |
| s_afd->channel_count, |
| PJMEDIA_AFD_SPF(s_afd), |
| (sport->options & PJMEDIA_STEREO_MIX), |
| 0); |
| } else { |
| pjmedia_convert_channel_1ton((pj_int16_t*)tmp_frame.buf, |
| (const pj_int16_t*)frame->buf, |
| dn_afd->channel_count, |
| PJMEDIA_AFD_SPF(s_afd), |
| sport->options); |
| } |
| tmp_frame.size = PJMEDIA_AFD_AVG_FSZ(dn_afd); |
| } 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; |
| const pjmedia_audio_format_detail *s_afd, *dn_afd; |
| 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; |
| } |
| |
| s_afd = pjmedia_format_get_audio_format_detail(&this_port->info.fmt, 1); |
| dn_afd = pjmedia_format_get_audio_format_detail(&sport->dn_port->info.fmt, |
| 1); |
| |
| tmp_frame.buf = sport->get_buf? sport->get_buf : frame->buf; |
| tmp_frame.size = PJMEDIA_PIA_AVG_FSZ(&sport->dn_port->info); |
| 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 (s_afd->channel_count == 1) { |
| pjmedia_convert_channel_nto1((pj_int16_t*)frame->buf, |
| (const pj_int16_t*)tmp_frame.buf, |
| dn_afd->channel_count, |
| PJMEDIA_AFD_SPF(s_afd), |
| (sport->options & PJMEDIA_STEREO_MIX), 0); |
| } else { |
| pjmedia_convert_channel_1ton((pj_int16_t*)frame->buf, |
| (const pj_int16_t*)tmp_frame.buf, |
| s_afd->channel_count, |
| PJMEDIA_AFD_SPF(dn_afd), |
| sport->options); |
| } |
| |
| frame->size = PJMEDIA_AFD_AVG_FSZ(s_afd); |
| 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; |
| } |
| |