encrypt_cenc_isma.c File Reference

#include <gpac/filters.h>
#include <gpac/constants.h>
#include <gpac/crypt_tools.h>
#include <gpac/crypt.h>
#include <gpac/base_coding.h>
#include <gpac/download.h>
#include <gpac/xml.h>
#include <gpac/internal/isomedia_dev.h>
#include <gpac/internal/media_dev.h>

Include dependency graph for encrypt_cenc_isma.c:

Data Structures
struct	CENC_MKey
struct	OBURange
struct	GF_CENCStream
struct	GF_CENCEncCtx

Macros
#define	OFFS(_n)   #_n, offsetof(GF_CENCEncCtx, _n)

Enumerations
enum	{ ISMAEA_STATE_ERROR , ISMAEA_STATE_SETUP , ISMAEA_STATE_PLAY }
enum	CENCCodecMode {   CENC_FULL_SAMPLE =1 , CENC_AVC , CENC_HEVC , CENC_AV1 ,   CENC_VPX , CENC_VVC }

Functions
static GF_Err	isma_enc_configure (GF_CENCEncCtx *ctx, GF_CENCStream *cstr, Bool is_isma, const char *scheme_uri, const char *kms_uri)
static GF_Err	adobe_enc_configure (GF_CENCEncCtx *ctx, GF_CENCStream *cstr)
static GF_Err	cenc_parse_pssh (GF_CENCEncCtx *ctx, GF_CENCStream *cstr, const char *cfile_name)
static void	cenc_pid_reset_codec_states (GF_CENCStream *cstr)
static GF_Err	cenc_enc_configure (GF_CENCEncCtx *ctx, GF_CENCStream *cstr, const char *cfile_name)
static void	cenc_free_pid_context (GF_CENCStream *cstr)
void	cenc_gen_bin128 (bin128 data)
static GF_Err	cenc_enc_configure_pid (GF_Filter *filter, GF_FilterPid *pid, Bool is_remove)
static GF_Err	isma_process (GF_CENCEncCtx *ctx, GF_CENCStream *cstr, GF_FilterPacket *pck)
static GF_Err	adobe_process (GF_CENCEncCtx *ctx, GF_CENCStream *cstr, GF_FilterPacket *pck)
static void	increase_counter (char *x, int x_size)
static void	cenc_resync_IV (GF_Crypt *mc, char IV[16], u8 IV_size)
static u32	cenc_get_clear_bytes (GF_CENCStream *cstr, GF_BitStream *plaintext_bs, char *samp_data, u32 nal_size, u32 bytes_in_nalhr)
static GF_Err	cenc_encrypt_packet (GF_CENCEncCtx *ctx, GF_CENCStream *cstr, GF_FilterPacket *pck)
static GF_Err	cenc_process (GF_CENCEncCtx *ctx, GF_CENCStream *cstr, GF_FilterPacket *pck)
static GF_Err	cenc_enc_process (GF_Filter *filter)
static GF_Err	cenc_enc_initialize (GF_Filter *filter)
static void	cenc_enc_finalize (GF_Filter *filter)
const GF_FilterRegister *	cecrypt_register (GF_FilterSession *session)

Variables
static const GF_FilterCapability	CENCEncCaps []
static const GF_FilterArgs	GF_CENCEncArgs []
GF_FilterRegister	CENCEncRegister

---

Data Structure Documentation

CENC_MKey

struct CENC_MKey

Data Fields
GF_Crypt *	crypt
char	IV[16]
bin128	key
u32	IV_size

OBURange

struct OBURange

Data Fields
u32	clear
u32	encrypted

GF_CENCStream

struct GF_CENCStream

Collaboration diagram for GF_CENCStream:

Data Fields
Bool	passthrough
GF_CryptInfo *	cinfo
GF_FilterPid *	ipid
GF_FilterPid *	opid
GF_TrackCryptInfo *	tci
u32	crypt_byte_block
u32	skip_byte_block
u32	nb_keys
CENC_MKey *	keys
Bool	multi_key
u32	codec_id
u32	nb_pck
u32	nalu_size_length
u32	dsi_crc
Bool	isma_oma
u64	BSO
u64	range_end
Bool	prev_pck_encrypted
u32	KI_length
u32	isma_IV_size
Bool	has_crypted_pck
Bool	is_adobe
CENCCodecMode	cenc_codec
u32	bytes_in_nal_hdr
Bool	use_subsamples
Bool	cenc_init
u32	nb_pck_encrypted
u32	kidx
u32	nb_saps
u32	nb_segments
u32	nb_periods
Bool	ctr_mode
Bool	is_saes
Bool	rap_roll
Bool	warned_clear
AVCState *	avc_state
HEVCState *	hevc_state
AV1State *	av1_state
OBURange *	av1_vpx_ranges
GF_VPConfig *	vp9_cfg
u32 *	vpx_frame_sizes
VVCState *	vvc_state
Bool	slice_header_clear
GF_PropUIntList	mkey_indices
u32	pssh_template_plus_one
GF_List *	pssh_templates
u64	num_block_crypted

GF_CENCEncCtx

struct GF_CENCEncCtx

Collaboration diagram for GF_CENCEncCtx:

Data Fields
const char *	cfile
Bool	allc
Bool	bk_stats
Bool	bk_skip
GF_CryptInfo *	cinfo
GF_List *	streams
GF_BitStream *	bs_w
GF_BitStream *	bs_r

Macro Definition Documentation

OFFS

#define OFFS

(

_n

)

#_n, offsetof(GF_CENCEncCtx, _n)

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
ISMAEA_STATE_ERROR
ISMAEA_STATE_SETUP
ISMAEA_STATE_PLAY

CENCCodecMode

enum CENCCodecMode

Enumerator
CENC_FULL_SAMPLE
CENC_AVC
CENC_HEVC
CENC_AV1
CENC_VPX
CENC_VVC

Function Documentation

isma_enc_configure()

static GF_Err isma_enc_configure ( GF_CENCEncCtx *  ctx, GF_CENCStream *  cstr, Bool  is_isma, const char *  scheme_uri, const char *  kms_uri  )

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adobe_enc_configure()

static GF_Err adobe_enc_configure ( GF_CENCEncCtx *  ctx, GF_CENCStream *  cstr  )

static

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cenc_parse_pssh()

static GF_Err cenc_parse_pssh ( GF_CENCEncCtx *  ctx, GF_CENCStream *  cstr, const char *  cfile_name  )

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cenc_pid_reset_codec_states()

static void cenc_pid_reset_codec_states ( GF_CENCStream *  cstr )

static

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cenc_enc_configure()

static GF_Err cenc_enc_configure ( GF_CENCEncCtx *  ctx, GF_CENCStream *  cstr, const char *  cfile_name  )

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cenc_free_pid_context()

static void cenc_free_pid_context ( GF_CENCStream *  cstr )

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cenc_gen_bin128()

void cenc_gen_bin128

(

bin128

data

)

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cenc_enc_configure_pid()

static GF_Err cenc_enc_configure_pid ( GF_Filter *  filter, GF_FilterPid *  pid, Bool  is_remove  )

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isma_process()

static GF_Err isma_process ( GF_CENCEncCtx *  ctx, GF_CENCStream *  cstr, GF_FilterPacket *  pck  )

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adobe_process()

static GF_Err adobe_process ( GF_CENCEncCtx *  ctx, GF_CENCStream *  cstr, GF_FilterPacket *  pck  )

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increase_counter()

static void increase_counter ( char *  x, int  x_size  )

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cenc_resync_IV()

static void cenc_resync_IV ( GF_Crypt *  mc, char  IV[16], u8  IV_size  )

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cenc_get_clear_bytes()

static u32 cenc_get_clear_bytes ( GF_CENCStream *  cstr, GF_BitStream *  plaintext_bs, char *  samp_data, u32  nal_size, u32  bytes_in_nalhr  )

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cenc_encrypt_packet()

static GF_Err cenc_encrypt_packet ( GF_CENCEncCtx *  ctx, GF_CENCStream *  cstr, GF_FilterPacket *  pck  )

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cenc_process()

static GF_Err cenc_process ( GF_CENCEncCtx *  ctx, GF_CENCStream *  cstr, GF_FilterPacket *  pck  )

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cenc_enc_process()

static GF_Err cenc_enc_process ( GF_Filter *  filter )

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cenc_enc_initialize()

static GF_Err cenc_enc_initialize ( GF_Filter *  filter )

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cenc_enc_finalize()

static void cenc_enc_finalize ( GF_Filter *  filter )

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cecrypt_register()

const GF_FilterRegister* cecrypt_register

(

GF_FilterSession *

session

)

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Variable Documentation

CENCEncCaps

const GF_FilterCapability CENCEncCaps[]

static

Initial value:

=
{
        CAP_UINT(GF_CAPS_INPUT_EXCLUDED, GF_PROP_PID_STREAM_TYPE, GF_STREAM_ENCRYPTED),
        CAP_UINT(GF_CAPS_INPUT_EXCLUDED, GF_PROP_PID_STREAM_TYPE, GF_STREAM_FILE),
        CAP_UINT(GF_CAPS_INPUT_EXCLUDED, GF_PROP_PID_CODECID, GF_CODECID_RAW),
        CAP_BOOL(GF_CAPS_INPUT_EXCLUDED, GF_PROP_PID_UNFRAMED, GF_TRUE),
        CAP_UINT(GF_CAPS_OUTPUT, GF_PROP_PID_STREAM_TYPE, GF_STREAM_ENCRYPTED),
        CAP_UINT(GF_CAPS_OUTPUT_EXCLUDED, GF_PROP_PID_CODECID, GF_CODECID_RAW),
}

GF_CENCEncArgs

const GF_FilterArgs GF_CENCEncArgs[]

static

Initial value:

=
{
        { OFFS(cfile), "crypt file location", GF_PROP_STRING, NULL, NULL, 0},
        { OFFS(allc), "throw error if no DRM config file is found for a PID", GF_PROP_BOOL, NULL, NULL, 0},
        { OFFS(bk_stats), "print number of encrypted blocks to stdout upon exit", GF_PROP_BOOL, NULL, NULL, 0},
        { OFFS(bk_skip), "skip encryption but performs all other tasks (test mode)", GF_PROP_BOOL, NULL, NULL, GF_FS_ARG_HINT_EXPERT},
        {0}
}

CENCEncRegister

GF_FilterRegister CENCEncRegister

Initial value:

= {
        .name = "cecrypt",
 
        GF_FS_SET_HELP("The CENC encryptor supports CENC, ISMA and Adobe encryption. It uses a DRM config file for declaring keys.\n"
        "The syntax is available at https://wiki.gpac.io/xmlformats/Common-Encryption\n"
        "The DRM config file can be set per PID using the property `CryptInfo`, or set at the filter level using [-cfile]().\n"
        "When the DRM config file is set per PID, the first `CrypTrack` in the DRM config file with the same ID is used, otherwise the first `CrypTrack` is used (regardless of the `CrypTrack` ID).\n"
        "When the DRM config file is set globally (not per PID), the first `CrypTrack` in the DRM config file with the same ID is used, otherwise the first `CrypTrack` with ID 0 or not set is used.\n"
        "If no DRM config file is defined for a given PID, this PID will not be encrypted, or an error will be thrown if [-allc]() is specified.\n"
        )
        .private_size = sizeof(GF_CENCEncCtx),
        .max_extra_pids=-1,
        
        .flags = GF_FS_REG_EXPLICIT_ONLY,
        .args = GF_CENCEncArgs,
        SETCAPS(CENCEncCaps),
        .configure_pid = cenc_enc_configure_pid,
        .initialize = cenc_enc_initialize,
        .finalize = cenc_enc_finalize,
        .process = cenc_enc_process,
        .hint_class_type = GF_FS_CLASS_CRYPTO
}