summaryrefslogtreecommitdiff
path: root/pjmedia/src/pjmedia/stereo_port.c
diff options
context:
space:
mode:
Diffstat (limited to 'pjmedia/src/pjmedia/stereo_port.c')
-rw-r--r--pjmedia/src/pjmedia/stereo_port.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia/stereo_port.c b/pjmedia/src/pjmedia/stereo_port.c
new file mode 100644
index 0000000..0dd2fb7
--- /dev/null
+++ b/pjmedia/src/pjmedia/stereo_port.c
@@ -0,0 +1,227 @@
+/* $Id: stereo_port.c 3664 2011-07-19 03:42:28Z nanang $ */
+/*
+ * 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;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-25 22:32:10 +0000