You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
106 lines
3.2 KiB
106 lines
3.2 KiB
/**
|
|
* @file opus.c
|
|
* @brief Real-Time Protocol Opus payload format parser
|
|
*/
|
|
/*****************************************************************************
|
|
* Copyright © 2022 VideoLabs, Videolan and VLC Authors
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public License
|
|
* as published by the Free Software Foundation; either version 2.1
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
****************************************************************************/
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <assert.h>
|
|
|
|
#include <vlc_common.h>
|
|
#include <vlc_block.h>
|
|
#include <vlc_es.h>
|
|
#include <vlc_plugin.h>
|
|
#include <vlc_strings.h>
|
|
|
|
#include "rtp.h"
|
|
|
|
static void *rtp_opus_init(struct vlc_rtp_pt *pt)
|
|
{
|
|
VLC_UNUSED(pt);
|
|
|
|
es_format_t fmt;
|
|
es_format_Init(&fmt, AUDIO_ES, VLC_CODEC_OPUS);
|
|
static const uint8_t header[] = { 'O', 'p', 'u', 's', 'H', 'e', 'a', 'd',
|
|
0x01, 0x02, /* version / 2 channels */
|
|
0x00, 0x00, /* preskip */
|
|
0x80, 0xbb, 0x00, 0x00, /* rate 48000 */
|
|
0x00, 0x00, 0x00 }; /* gain / mapping */
|
|
fmt.p_extra = malloc(sizeof(header));
|
|
if(!fmt.p_extra)
|
|
return NULL;
|
|
fmt.i_extra = sizeof(header);
|
|
memcpy(fmt.p_extra, header, sizeof(header));
|
|
|
|
struct vlc_rtp_es *es = vlc_rtp_pt_request_es(pt, &fmt);
|
|
es_format_Clean(&fmt);
|
|
|
|
return es;
|
|
}
|
|
|
|
static void rtp_opus_destroy(struct vlc_rtp_pt *pt, void *data)
|
|
{
|
|
VLC_UNUSED(pt);
|
|
struct vlc_rtp_es *es = data;
|
|
vlc_rtp_es_destroy(es);
|
|
}
|
|
|
|
static void rtp_opus_decode(struct vlc_rtp_pt *pt, void *data, block_t *block,
|
|
const struct vlc_rtp_pktinfo *restrict info)
|
|
{
|
|
VLC_UNUSED(pt); VLC_UNUSED(info);
|
|
struct vlc_rtp_es *es = data;
|
|
|
|
if (block->i_buffer == 0)
|
|
{
|
|
block_Release(block);
|
|
return;
|
|
}
|
|
|
|
vlc_rtp_es_send(es, block);
|
|
}
|
|
|
|
static const struct vlc_rtp_pt_operations rtp_opus_ops = {
|
|
NULL, rtp_opus_init, rtp_opus_destroy, rtp_opus_decode,
|
|
};
|
|
|
|
static int rtp_opus_open(vlc_object_t *obj, struct vlc_rtp_pt *pt,
|
|
const struct vlc_sdp_pt *desc)
|
|
{
|
|
VLC_UNUSED(obj);
|
|
|
|
if (vlc_ascii_strcasecmp(desc->name, "OPUS") ||
|
|
desc->clock_rate != 48000 ||
|
|
desc->channel_count != 2)
|
|
return VLC_ENOTSUP;
|
|
|
|
pt->ops = &rtp_opus_ops;
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
vlc_module_begin()
|
|
set_shortname(N_("RTP Opus"))
|
|
set_description(N_("RTP Opus audio payload parser"))
|
|
set_subcategory(SUBCAT_INPUT_DEMUX)
|
|
set_rtp_parser_callback(rtp_opus_open)
|
|
add_shortcut("audio/opus")
|
|
vlc_module_end()
|
|
|