FFmpeg
libavformat
hls_sample_encryption.h
Go to the documentation of this file.
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/*
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* Apple HTTP Live Streaming Sample Encryption/Decryption
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*
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* Copyright (c) 2021 Nachiket Tarate
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Apple HTTP Live Streaming Sample Encryption
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* https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/HLS_Sample_Encryption
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*/
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#ifndef AVFORMAT_HLS_SAMPLE_ENCRYPTION_H
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#define AVFORMAT_HLS_SAMPLE_ENCRYPTION_H
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#include <stddef.h>
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#include <stdint.h>
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#include "
libavcodec/codec_id.h
"
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#include "
libavcodec/packet.h
"
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#include "
avformat.h
"
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#define HLS_MAX_ID3_TAGS_DATA_LEN 138
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#define HLS_MAX_AUDIO_SETUP_DATA_LEN 10
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typedef
struct
HLSCryptoContext
{
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struct
AVAES
*
aes_ctx
;
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uint8_t
key
[16];
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uint8_t
iv
[16];
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}
HLSCryptoContext
;
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typedef
struct
HLSAudioSetupInfo
{
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enum
AVCodecID
codec_id
;
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uint32_t
codec_tag
;
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uint16_t
priming
;
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uint8_t
version
;
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uint8_t
setup_data_length
;
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uint8_t
setup_data
[
HLS_MAX_AUDIO_SETUP_DATA_LEN
];
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}
HLSAudioSetupInfo
;
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void
ff_hls_senc_read_audio_setup_info
(
HLSAudioSetupInfo
*
info
,
const
uint8_t *buf,
size_t
size
);
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int
ff_hls_senc_parse_audio_setup_info
(
AVStream
*st,
HLSAudioSetupInfo
*
info
);
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int
ff_hls_senc_decrypt_frame
(
enum
AVCodecID
codec_id
,
HLSCryptoContext
*crypto_ctx,
AVPacket
*
pkt
);
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#endif
/* AVFORMAT_HLS_SAMPLE_ENCRYPTION_H */
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HLSAudioSetupInfo::version
uint8_t version
Definition:
hls_sample_encryption.h:53
HLSAudioSetupInfo::setup_data_length
uint8_t setup_data_length
Definition:
hls_sample_encryption.h:54
ff_hls_senc_parse_audio_setup_info
int ff_hls_senc_parse_audio_setup_info(AVStream *st, HLSAudioSetupInfo *info)
Definition:
hls_sample_encryption.c:93
ff_hls_senc_decrypt_frame
int ff_hls_senc_decrypt_frame(enum AVCodecID codec_id, HLSCryptoContext *crypto_ctx, AVPacket *pkt)
Definition:
hls_sample_encryption.c:387
HLSCryptoContext::iv
uint8_t iv[16]
Definition:
hls_sample_encryption.h:46
pkt
AVPacket * pkt
Definition:
movenc.c:60
codec_id.h
HLSCryptoContext::aes_ctx
struct AVAES * aes_ctx
Definition:
hls_sample_encryption.h:44
info
MIPS optimizations info
Definition:
mips.txt:2
codec_id
enum AVCodecID codec_id
Definition:
vaapi_decode.c:410
HLSAudioSetupInfo::setup_data
uint8_t setup_data[HLS_MAX_AUDIO_SETUP_DATA_LEN]
Definition:
hls_sample_encryption.h:55
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition:
codec_id.h:49
HLSCryptoContext
Definition:
hls_sample_encryption.h:43
size
int size
Definition:
twinvq_data.h:10344
HLSAudioSetupInfo::priming
uint16_t priming
Definition:
hls_sample_encryption.h:52
HLSAudioSetupInfo::codec_id
enum AVCodecID codec_id
Definition:
hls_sample_encryption.h:50
packet.h
HLS_MAX_AUDIO_SETUP_DATA_LEN
#define HLS_MAX_AUDIO_SETUP_DATA_LEN
Definition:
hls_sample_encryption.h:41
AVStream
Stream structure.
Definition:
avformat.h:748
AVAES
Definition:
aes_internal.h:34
avformat.h
ff_hls_senc_read_audio_setup_info
void ff_hls_senc_read_audio_setup_info(HLSAudioSetupInfo *info, const uint8_t *buf, size_t size)
Definition:
hls_sample_encryption.c:61
AVPacket
This structure stores compressed data.
Definition:
packet.h:516
HLSAudioSetupInfo::codec_tag
uint32_t codec_tag
Definition:
hls_sample_encryption.h:51
HLSAudioSetupInfo
Definition:
hls_sample_encryption.h:49
HLSCryptoContext::key
uint8_t key[16]
Definition:
hls_sample_encryption.h:45
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