D-Modem/pjproject-2.11.1/pjmedia/include/pjmedia-codec/vpx_packetizer.h
2021-10-29 14:41:03 -04:00

123 lines
3.7 KiB
C

/*
* Copyright (C) 2020 Teluu Inc. (http://www.teluu.com)
*
* 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
*/
#ifndef __PJMEDIA_VPX_PACKETIZER_H__
#define __PJMEDIA_VPX_PACKETIZER_H__
/**
* @file vpx_packetizer.h
* @brief Packetizes VPX bitstream into RTP payload and vice versa.
*/
#include <pj/types.h>
PJ_BEGIN_DECL
/**
* Opaque declaration for VPX packetizer.
*/
typedef struct pjmedia_vpx_packetizer pjmedia_vpx_packetizer;
/**
* VPX packetizer setting.
*/
typedef struct pjmedia_vpx_packetizer_cfg
{
/**
* VPX format id.
* Default: PJMEDIA_FORMAT_VP8
*/
pj_uint32_t fmt_id;
/**
* MTU size.
* Default: PJMEDIA_MAX_VID_PAYLOAD_SIZE
*/
unsigned mtu;
}
pjmedia_vpx_packetizer_cfg;
/**
* Use this function to initialize VPX packetizer config.
*
* @param cfg The VPX packetizer config to be initialized.
*/
PJ_DECL(void) pjmedia_vpx_packetizer_cfg_default(
pjmedia_vpx_packetizer_cfg *cfg);
/**
* Create VPX packetizer.
*
* @param pool The memory pool.
* @param cfg Packetizer settings, if NULL, default setting
* will be used.
* @param p_pktz Pointer to receive the packetizer.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pjmedia_vpx_packetizer_create(
pj_pool_t *pool,
const pjmedia_vpx_packetizer_cfg *cfg,
pjmedia_vpx_packetizer **p_pktz);
/**
* Generate an RTP payload from a VPX picture bitstream. Note that this
* function will apply in-place processing, so the bitstream may be modified
* during the packetization.
*
* @param pktz The packetizer.
* @param bits_len The length of the bitstream.
* @param bits_pos The bitstream offset to be packetized.
* @param is_keyframe The frame is keyframe.
* @param payload The output payload.
* @param payload_len The output payload length, on input it represents max
* payload length.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pjmedia_vpx_packetize(const pjmedia_vpx_packetizer *pktz,
pj_size_t bits_len,
unsigned *bits_pos,
pj_bool_t is_keyframe,
pj_uint8_t **payload,
pj_size_t *payload_len);
/**
* Append an RTP payload to an VPX picture bitstream. Note that in case of
* noticing packet lost, application should keep calling this function with
* payload pointer set to NULL, as the packetizer need to update its internal
* state.
*
* @param pktz The packetizer.
* @param payload The payload to be unpacketized.
* @param payload_len The payload length.
* @param payload_desc_len The payload description length.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pjmedia_vpx_unpacketize(pjmedia_vpx_packetizer *pktz,
const pj_uint8_t *payload,
pj_size_t payload_len,
unsigned *payload_desc_len);
PJ_END_DECL
#endif /* __PJMEDIA_VPX_PACKETIZER_H__ */