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/*
* Apple HTTP Live Streaming Sample Encryption/Decryption
*
* Copyright (c) 2021 Nachiket Tarate
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Apple HTTP Live Streaming Sample Encryption
* https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/HLS_Sample_Encryption
*/
#ifndef AVFORMAT_HLS_SAMPLE_ENCRYPTION_H
#define AVFORMAT_HLS_SAMPLE_ENCRYPTION_H
#include <stdint.h>
#include "avformat.h"
#include "libavcodec/avcodec.h"
#include "libavutil/aes.h"
#define HLS_MAX_ID3_TAGS_DATA_LEN 138
#define HLS_MAX_AUDIO_SETUP_DATA_LEN 10
typedef struct HLSCryptoContext {
struct AVAES *aes_ctx;
uint8_t key[16];
uint8_t iv[16];
} HLSCryptoContext;
typedef struct HLSAudioSetupInfo {
enum AVCodecID codec_id;
uint32_t codec_tag;
uint16_t priming;
uint8_t version;
uint8_t setup_data_length;
uint8_t setup_data[HLS_MAX_AUDIO_SETUP_DATA_LEN];
} HLSAudioSetupInfo;
void ff_hls_senc_read_audio_setup_info(HLSAudioSetupInfo *info, const uint8_t *buf, size_t size);
int ff_hls_senc_parse_audio_setup_info(AVStream *st, HLSAudioSetupInfo *info);
int ff_hls_senc_decrypt_frame(enum AVCodecID codec_id, HLSCryptoContext *crypto_ctx, AVPacket *pkt);
#endif /* AVFORMAT_HLS_SAMPLE_ENCRYPTION_H */
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