dec_scte35.c File Reference

#include <gpac/filters.h>
#include <gpac/internal/isomedia_dev.h>
#include <gpac/internal/scte35.h>

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Data Structures
struct	Event
struct	SCTE35DecCtx

Macros
#define	IS_SEGMENTED   (ctx->sampdur.den && ctx->sampdur.num>0)
#define	IS_PASSTHRU   (ctx->mode == 1)
#define	OFFS(_n)   #_n, offsetof(SCTE35DecCtx, _n)

Typedefs
typedef u32	SCTE35DecDataMode

Enumerations
enum	SCTE35DecDataMode_t { PROP =0 , RAW , BOX }

Functions
static GF_Err	scte35dec_initialize_internal (SCTE35DecCtx *ctx)
static GF_Err	scte35dec_initialize (GF_Filter *filter)
static void	scte35dec_finalize_internal (SCTE35DecCtx *ctx)
static void	scte35dec_finalize (GF_Filter *filter)
static GF_Err	scte35dec_configure_pid (GF_Filter *filter, GF_FilterPid *pid, Bool is_remove)
static Bool	scte35dec_process_event (GF_Filter *filter, const GF_FilterEvent *evt)
static void	scte35dec_send_pck (SCTE35DecCtx *ctx, GF_FilterPacket *pck, u64 dts, u32 dur)
static GF_Err	scte35dec_flush_emeb (SCTE35DecCtx *ctx, u64 dts, u32 dur)
static void	scte35dec_schedule (SCTE35DecCtx *ctx, u64 dts, GF_EventMessageBox *emib)
static u32	compute_emib_duration (u64 dts, u64 evt_dts, u32 max_dur, u32 evt_dur)
static GF_Err	scte35dec_flush_emib (SCTE35DecCtx *ctx, u64 dts, u32 max_dur)
static GF_Err	scte35_insert_emeb_before_emib (SCTE35DecCtx *ctx, Event *first_evt, u64 dts, u64 dur)
static GF_Err	scte35dec_push_box (SCTE35DecCtx *ctx, const u64 dts, const u32 dur)
static void	scte35dec_flush (SCTE35DecCtx *ctx)
static GF_Err	new_segment (SCTE35DecCtx *ctx)
static u64	scte35dec_parse_splice_time (GF_BitStream *bs)
Bool	scte35dec_get_timing (const u8 *data, u32 size, u64 *pts, u64 *dur, u32 *splice_event_id, Bool *needs_idr)
static void	scte35dec_process_timing (SCTE35DecCtx *ctx, u64 dts, u32 timescale, u32 dur)
static GF_Err	scte35dec_process_emsg (SCTE35DecCtx *ctx, const u8 *data, u32 size, u64 dts)
static Bool	scte35dec_is_splice_point (SCTE35DecCtx *ctx, u64 cts)
static GF_Err	scte35dec_process_dispatch (SCTE35DecCtx *ctx, u64 dts, u32 dur)
static GF_Err	scte35dec_process_passthrough (SCTE35DecCtx *ctx, GF_FilterPacket *pck)
static const u8 *	scte35dec_pck_get_data (SCTE35DecCtx *ctx, GF_FilterPacket *pck, u32 *size, Bool *own)
static GF_Err	scte35dec_process (GF_Filter *filter)
const GF_FilterRegister *	scte35dec_register (GF_FilterSession *session)

Variables
static const GF_FilterCapability	SCTE35DecCaps []
static const GF_FilterArgs	SCTE35DecArgs []
GF_FilterRegister	SCTE35DecRegister

---

Data Structure Documentation

Event

struct Event

Collaboration diagram for Event:

Data Fields
u64	dts
GF_EventMessageBox *	emib

Macro Definition Documentation

IS_SEGMENTED

#define IS_SEGMENTED   (ctx->sampdur.den && ctx->sampdur.num>0)

IS_PASSTHRU

#define IS_PASSTHRU   (ctx->mode == 1)

OFFS

#define OFFS

(

_n

)

#_n, offsetof(SCTE35DecCtx, _n)

Typedef Documentation

SCTE35DecDataMode

typedef u32 SCTE35DecDataMode

Enumeration Type Documentation

SCTE35DecDataMode_t

enum SCTE35DecDataMode_t

Enumerator
PROP
RAW
BOX

Function Documentation

scte35dec_initialize_internal()

static GF_Err scte35dec_initialize_internal ( SCTE35DecCtx *  ctx )

static

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scte35dec_initialize()

static GF_Err scte35dec_initialize ( GF_Filter *  filter )

static

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scte35dec_finalize_internal()

static void scte35dec_finalize_internal ( SCTE35DecCtx *  ctx )

static

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scte35dec_finalize()

static void scte35dec_finalize ( GF_Filter *  filter )

static

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scte35dec_configure_pid()

static GF_Err scte35dec_configure_pid ( GF_Filter *  filter, GF_FilterPid *  pid, Bool  is_remove  )

static

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scte35dec_process_event()

static Bool scte35dec_process_event ( GF_Filter *  filter, const GF_FilterEvent *  evt  )

static

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scte35dec_send_pck()

static void scte35dec_send_pck ( SCTE35DecCtx *  ctx, GF_FilterPacket *  pck, u64  dts, u32  dur  )

static

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scte35dec_flush_emeb()

static GF_Err scte35dec_flush_emeb ( SCTE35DecCtx *  ctx, u64  dts, u32  dur  )

static

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scte35dec_schedule()

static void scte35dec_schedule ( SCTE35DecCtx *  ctx, u64  dts, GF_EventMessageBox *  emib  )

static

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compute_emib_duration()

static u32 compute_emib_duration ( u64  dts, u64  evt_dts, u32  max_dur, u32  evt_dur  )

static

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scte35dec_flush_emib()

static GF_Err scte35dec_flush_emib ( SCTE35DecCtx *  ctx, u64  dts, u32  max_dur  )

static

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scte35_insert_emeb_before_emib()

static GF_Err scte35_insert_emeb_before_emib ( SCTE35DecCtx *  ctx, Event *  first_evt, u64  dts, u64  dur  )

static

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scte35dec_push_box()

static GF_Err scte35dec_push_box ( SCTE35DecCtx *  ctx, const u64  dts, const u32  dur  )

static

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scte35dec_flush()

static void scte35dec_flush ( SCTE35DecCtx *  ctx )

static

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new_segment()

static GF_Err new_segment ( SCTE35DecCtx *  ctx )

static

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scte35dec_parse_splice_time()

static u64 scte35dec_parse_splice_time ( GF_BitStream *  bs )

static

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scte35dec_get_timing()

Bool scte35dec_get_timing	(	const u8 *	data,
		u32	size,
		u64 *	pts,
		u64 *	dur,
		u32 *	splice_event_id,
		Bool *	needs_idr
	)

SCTE-35 parsing of the MPEG2-TS splice_info_section to extract timing and event information

Parameters

data	the entire SCTE 35 splice_info_section
size	size of the section
pts	[out] effective splice PTS in 90kHz timescale (if function returns true)
dur	[out] break_duration in 90kHz timescale (if function returns true)
splice_event_id	[out] splice event id (if function returns true)
needs_idr	[out] set to true when the splice point requires an IDR

Returns

GF_TRUE if timing was successfully extracted, GF_FALSE otherwise

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scte35dec_process_timing()

static void scte35dec_process_timing ( SCTE35DecCtx *  ctx, u64  dts, u32  timescale, u32  dur  )

static

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scte35dec_process_emsg()

static GF_Err scte35dec_process_emsg ( SCTE35DecCtx *  ctx, const u8 *  data, u32  size, u64  dts  )

static

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scte35dec_is_splice_point()

static Bool scte35dec_is_splice_point ( SCTE35DecCtx *  ctx, u64  cts  )

static

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scte35dec_process_dispatch()

static GF_Err scte35dec_process_dispatch ( SCTE35DecCtx *  ctx, u64  dts, u32  dur  )

static

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scte35dec_process_passthrough()

static GF_Err scte35dec_process_passthrough ( SCTE35DecCtx *  ctx, GF_FilterPacket *  pck  )

static

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scte35dec_pck_get_data()

static const u8 * scte35dec_pck_get_data ( SCTE35DecCtx *  ctx, GF_FilterPacket *  pck, u32 *  size, Bool *  own  )

static

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scte35dec_process()

static GF_Err scte35dec_process ( GF_Filter *  filter )

static

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scte35dec_register()

const GF_FilterRegister * scte35dec_register

(

GF_FilterSession *

session

)

Variable Documentation

SCTE35DecCaps

const GF_FilterCapability SCTE35DecCaps[]

static

Initial value:

=
{
        CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_STREAM_TYPE, GF_STREAM_AUDIO),
        CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_STREAM_TYPE, GF_STREAM_VISUAL),
        CAP_UINT(GF_CAPS_INPUT_EXCLUDED, GF_PROP_PID_CODECID, GF_CODECID_NONE),
        CAP_BOOL(GF_CAPS_INPUT_EXCLUDED, GF_PROP_PID_UNFRAMED, GF_TRUE),
 
        CAP_UINT(GF_CAPS_OUTPUT_STATIC, GF_PROP_PID_STREAM_TYPE, GF_STREAM_METADATA),
        CAP_UINT(GF_CAPS_OUTPUT_STATIC, GF_PROP_PID_CODECID, GF_CODECID_EVTE),
 
        {0},
 
        CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_STREAM_TYPE, GF_STREAM_METADATA),
        CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_CODECID, GF_CODECID_SCTE35),
        CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_CODECID, GF_CODECID_EVTE),
        CAP_BOOL(GF_CAPS_INPUT_EXCLUDED, GF_PROP_PID_UNFRAMED, GF_TRUE),
 
        CAP_BOOL(GF_CAPS_OUTPUT_STATIC_EXCLUDED, GF_PROP_PID_UNFRAMED, GF_TRUE),
        CAP_UINT(GF_CAPS_OUTPUT_EXCLUDED, GF_PROP_PID_STREAM_TYPE, GF_STREAM_FILE),
        CAP_UINT(GF_CAPS_OUTPUT_EXCLUDED, GF_PROP_PID_CODECID, GF_CODECID_NONE),
}

SCTE35DecArgs

const GF_FilterArgs SCTE35DecArgs[]

static

Initial value:

=
{
        { OFFS(mode), "mode to operate in\n"
                "- 23001-18: extract SCTE-35 markers as emib/emeb boxes for Event Tracks\n"
                "- passthrough: pass-through mode adding cue start property on splice points", GF_PROP_UINT, "23001-18", "23001-18|passthrough", 0},
        { OFFS(sampdur), "segmentation duration in seconds. Default value 0 only flushes when content changes", GF_PROP_FRACTION, "0/1", NULL, 0},
        {0}
}

SCTE35DecRegister

GF_FilterRegister SCTE35DecRegister

Initial value:

= {
        .name = "scte35dec",
 
        GF_FS_SET_HELP("This filter writes the SCTE-35 markers attached as properties to audio and video\n"
                       "packets or inside a dedicated stream, as 23001-18 'emib' boxes. It also creates\n"
                                   "empty 'emeb' box in between following segmentation as hinted by the graph.")
        .private_size = sizeof(SCTE35DecCtx),
        .args = SCTE35DecArgs,
        .flags = GF_FS_REG_EXPLICIT_ONLY,
        SETCAPS(SCTE35DecCaps),
        .process = scte35dec_process,
        .process_event = scte35dec_process_event,
        .configure_pid = scte35dec_configure_pid,
        .initialize = scte35dec_initialize,
        .finalize = scte35dec_finalize,
        .hint_class_type = GF_FS_CLASS_DECODER
}