obs-studio/libobs/obs-avc.h

/******************************************************************************
    Copyright (C) 2023 by Lain Bailey <[email protected]>

    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, see <http://www.gnu.org/licenses/>.
******************************************************************************/

#pragma once

#include "obs-nal.h"

#ifdef __cplusplus
extern "C" {
#endif

struct encoder_packet;

enum {
	OBS_NAL_UNKNOWN = 0,
	OBS_NAL_SLICE = 1,
	OBS_NAL_SLICE_DPA = 2,
	OBS_NAL_SLICE_DPB = 3,
	OBS_NAL_SLICE_DPC = 4,
	OBS_NAL_SLICE_IDR = 5,
	OBS_NAL_SEI = 6,
	OBS_NAL_SPS = 7,
	OBS_NAL_PPS = 8,
	OBS_NAL_AUD = 9,
	OBS_NAL_FILLER = 12,
};

/* Helpers for parsing AVC NAL units.  */

EXPORT bool obs_avc_keyframe(const uint8_t *data, size_t size);
EXPORT const uint8_t *obs_avc_find_startcode(const uint8_t *p, const uint8_t *end);
EXPORT void obs_parse_avc_packet(struct encoder_packet *avc_packet, const struct encoder_packet *src);
EXPORT int obs_parse_avc_packet_priority(const struct encoder_packet *packet);
EXPORT size_t obs_parse_avc_header(uint8_t **header, const uint8_t *data, size_t size);
EXPORT void obs_extract_avc_headers(const uint8_t *packet, size_t size, uint8_t **new_packet_data,
				    size_t *new_packet_size, uint8_t **header_data, size_t *header_size,
				    uint8_t **sei_data, size_t *sei_size);

#ifdef __cplusplus
}
#endif