lws-rtp.h

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/*
 * libwebsockets - small server side websockets and web server implementation
 *
 * Copyright (C) 2010 - 2026 Andy Green <andy@warmcat.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
 
#ifndef __LWS_RTP_H__
#define __LWS_RTP_H__
 
/* Video resolutions */
#define LWS_RTP_VIDEO_WIDTH_1080P       1920
#define LWS_RTP_VIDEO_HEIGHT_1080P      1080
#define LWS_RTP_VIDEO_WIDTH_720P        1280
#define LWS_RTP_VIDEO_HEIGHT_720P       720
#define LWS_RTP_VIDEO_WIDTH_360P        640
#define LWS_RTP_VIDEO_HEIGHT_360P       360
 
#define LWS_RTP_MTU_DEFAULT             1200
 
/* Audio properties */
#define LWS_RTP_AUDIO_SAMPLE_RATE       48000
#define LWS_RTP_AUDIO_CHANNELS          2
 
/* Common Payload Types (Dynamic usually) */
#define LWS_RTP_PT_OPUS                 111
#define LWS_RTP_PT_H264                 126
 
/* RTP Header (RFC 3550) length */
#define LWS_RTP_HEADER_LEN 12
 
struct lws_rtp_ctx {
        uint32_t ssrc;
        uint32_t ts;
        uint32_t last_ts;
        uint16_t seq;
        uint8_t pt; /* Payload Type */
        uint8_t new_frame;
};
 
typedef void (*lws_rtp_cb_t)(void *priv, const uint8_t *pkt, size_t len, int marker);

LWS_VISIBLE LWS_EXTERN void
lws_rtp_init(struct lws_rtp_ctx *ctx, uint32_t ssrc, uint8_t pt);

LWS_VISIBLE LWS_EXTERN void
lws_rtp_write_header(struct lws_rtp_ctx *ctx, uint8_t *buf, int marker);

LWS_VISIBLE LWS_EXTERN int
lws_rtp_h264_packetize(struct lws_rtp_ctx *ctx, const uint8_t *nal, size_t len,
                       int last_nal, size_t mtu, lws_rtp_cb_t cb, void *priv);
 
LWS_VISIBLE LWS_EXTERN int
lws_rtp_av1_packetize(struct lws_rtp_ctx *ctx, const uint8_t *obu, size_t len,
                       int last_obu, size_t mtu, lws_rtp_cb_t cb, void *priv);
 
#endif /* __LWS_RTP_H__ */