Demuxes an IMF Composition. More...

#include "avio_internal.h"
#include "demux.h"
#include "imf.h"
#include "internal.h"
#include "libavcodec/packet.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "mxf.h"
#include <inttypes.h>
#include <libxml/parser.h>

Data Structures
struct	IMFAssetLocator
	IMF Asset locator. More...

struct	IMFAssetLocatorMap
	IMF Asset locator map Results from the parsing of one or more ASSETMAP XML files. More...

struct	IMFVirtualTrackResourcePlaybackCtx

struct	IMFVirtualTrackPlaybackCtx

struct	IMFContext

Macros
#define	AVRATIONAL_FORMAT "%d/%d"

#define	AVRATIONAL_ARG(rational) rational.num, rational.den

Functions
static int	imf_uri_is_url (const char *string)

static int	imf_uri_is_unix_abs_path (const char *string)

static int	imf_uri_is_dos_abs_path (const char *string)

static int	imf_time_to_ts (int64_t *ts, AVRational t, AVRational time_base)

static int	parse_imf_asset_map_from_xml_dom (AVFormatContext s, xmlDocPtr doc, IMFAssetLocatorMap asset_map, const char *base_url)
	Parse a ASSETMAP XML file to extract the UUID-URI mapping of assets. More...

static void	imf_asset_locator_map_init (IMFAssetLocatorMap *asset_map)
	Initializes an IMFAssetLocatorMap structure. More...

static void	imf_asset_locator_map_deinit (IMFAssetLocatorMap *asset_map)
	Free a IMFAssetLocatorMap pointer. More...

static int	parse_assetmap (AVFormatContext s, const char url)

static IMFAssetLocator *	find_asset_map_locator (IMFAssetLocatorMap *asset_map, AVUUID uuid)

static int	open_track_resource_context (AVFormatContext s, IMFVirtualTrackPlaybackCtx track, int32_t resource_index)

static int	open_track_file_resource (AVFormatContext s, FFIMFTrackFileResource track_file_resource, IMFVirtualTrackPlaybackCtx *track)

static void	imf_virtual_track_playback_context_deinit (IMFVirtualTrackPlaybackCtx *track)

static int	open_virtual_track (AVFormatContext s, FFIMFTrackFileVirtualTrack virtual_track, int32_t track_index)

static int	set_context_streams_from_tracks (AVFormatContext *s)

static int	open_cpl_tracks (AVFormatContext *s)

static int	imf_read_header (AVFormatContext *s)

static IMFVirtualTrackPlaybackCtx *	get_next_track_with_minimum_timestamp (AVFormatContext *s)

static int	get_resource_context_for_timestamp (AVFormatContext s, IMFVirtualTrackPlaybackCtx track, IMFVirtualTrackResourcePlaybackCtx **resource)

static int	imf_read_packet (AVFormatContext s, AVPacket pkt)

static int	imf_close (AVFormatContext *s)

static int	imf_probe (const AVProbeData *p)

static int	coherent_ts (int64_t ts, AVRational in_tb, AVRational out_tb)

static int	imf_seek (AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)

Variables
static const AVOption	imf_options []

static const AVClass	imf_class

const AVInputFormat	ff_imf_demuxer

Detailed Description

Demuxes an IMF Composition.

References OV 2067-0:2018 - SMPTE Overview Document - Interoperable Master Format ST 2067-2:2020 - SMPTE Standard - Interoperable Master Format — Core Constraints ST 2067-3:2020 - SMPTE Standard - Interoperable Master Format — Composition Playlist ST 2067-5:2020 - SMPTE Standard - Interoperable Master Format — Essence Component ST 2067-20:2016 - SMPTE Standard - Interoperable Master Format — Application #2 ST 2067-21:2020 - SMPTE Standard - Interoperable Master Format — Application #2 Extended ST 2067-102:2017 - SMPTE Standard - Interoperable Master Format — Common Image Pixel Color Schemes ST 429-9:2007 - SMPTE Standard - D-Cinema Packaging — Asset Mapping and File Segmentation

Author: Marc-Antoine Arnaud; Valentin Noel; Nicholas Vanderzwet

Definition in file imfdec.c.

Macro Definition Documentation

◆ AVRATIONAL_FORMAT

#define AVRATIONAL_FORMAT "%d/%d"

Definition at line 78 of file imfdec.c.

◆ AVRATIONAL_ARG

#define AVRATIONAL_ARG ( rational ) rational.num, rational.den

Definition at line 79 of file imfdec.c.

Function Documentation

◆ imf_uri_is_url()

static int imf_uri_is_url ( const char * string )

static

Definition at line 130 of file imfdec.c.

Referenced by parse_imf_asset_map_from_xml_dom(), and test_path_type_functions().

◆ imf_uri_is_unix_abs_path()

static int imf_uri_is_unix_abs_path ( const char * string )

static

Definition at line 135 of file imfdec.c.

Referenced by parse_imf_asset_map_from_xml_dom(), and test_path_type_functions().

◆ imf_uri_is_dos_abs_path()

static int imf_uri_is_dos_abs_path ( const char * string )

static

Definition at line 140 of file imfdec.c.

Referenced by parse_imf_asset_map_from_xml_dom(), and test_path_type_functions().

◆ imf_time_to_ts()

static int imf_time_to_ts	(	int64_t *	ts,
		AVRational	t,
		AVRational	time_base
	)

static

Definition at line 157 of file imfdec.c.

Referenced by imf_read_packet(), and open_track_resource_context().

◆ parse_imf_asset_map_from_xml_dom()

static int parse_imf_asset_map_from_xml_dom	(	AVFormatContext *	s,
		xmlDocPtr	doc,
		IMFAssetLocatorMap *	asset_map,
		const char *	base_url
	)

static

Parse a ASSETMAP XML file to extract the UUID-URI mapping of assets.

Parameters

s	the current format context, if any (can be NULL).
doc	the XML document to be parsed.
asset_map	pointer on the IMFAssetLocatorMap to fill.
base_url	the url of the asset map XML file, if any (can be NULL).

Returns: a negative value in case of error, 0 otherwise.

Definition at line 184 of file imfdec.c.

Referenced by parse_assetmap(), and test_asset_map_parsing().

◆ imf_asset_locator_map_init()

static void imf_asset_locator_map_init ( IMFAssetLocatorMap * asset_map )

static

Initializes an IMFAssetLocatorMap structure.

Definition at line 274 of file imfdec.c.

Referenced by imf_read_header(), and test_asset_map_parsing().

◆ imf_asset_locator_map_deinit()

static void imf_asset_locator_map_deinit ( IMFAssetLocatorMap * asset_map )

static

Free a IMFAssetLocatorMap pointer.

Definition at line 283 of file imfdec.c.

Referenced by imf_close(), and test_asset_map_parsing().

◆ parse_assetmap()

static int parse_assetmap	(	AVFormatContext *	s,
		const char *	url
	)

static

Definition at line 291 of file imfdec.c.

Referenced by imf_read_header().

◆ find_asset_map_locator()

static IMFAssetLocator* find_asset_map_locator	(	IMFAssetLocatorMap *	asset_map,
		AVUUID	uuid
	)

static

Definition at line 346 of file imfdec.c.

Referenced by open_track_file_resource().

◆ open_track_resource_context()

static int open_track_resource_context	(	AVFormatContext *	s,
		IMFVirtualTrackPlaybackCtx *	track,
		int32_t	resource_index
	)

static

Definition at line 355 of file imfdec.c.

Referenced by get_resource_context_for_timestamp(), and set_context_streams_from_tracks().

◆ open_track_file_resource()

static int open_track_file_resource	(	AVFormatContext *	s,
		FFIMFTrackFileResource *	track_file_resource,
		IMFVirtualTrackPlaybackCtx *	track
	)

static

Definition at line 446 of file imfdec.c.

Referenced by open_virtual_track().

◆ imf_virtual_track_playback_context_deinit()

static void imf_virtual_track_playback_context_deinit ( IMFVirtualTrackPlaybackCtx * track )

static

Definition at line 500 of file imfdec.c.

Referenced by imf_close(), and open_virtual_track().

◆ open_virtual_track()

static int open_virtual_track	(	AVFormatContext *	s,
		FFIMFTrackFileVirtualTrack *	virtual_track,
		int32_t	track_index
	)

static

Definition at line 508 of file imfdec.c.

Referenced by open_cpl_tracks().

◆ set_context_streams_from_tracks()

static int set_context_streams_from_tracks ( AVFormatContext * s )

static

Definition at line 560 of file imfdec.c.

Referenced by open_cpl_tracks().

◆ open_cpl_tracks()

static int open_cpl_tracks ( AVFormatContext * s )

static

Definition at line 599 of file imfdec.c.

Referenced by imf_read_header().

◆ imf_read_header()

static int imf_read_header ( AVFormatContext * s )

static

Definition at line 624 of file imfdec.c.

◆ get_next_track_with_minimum_timestamp()

static IMFVirtualTrackPlaybackCtx* get_next_track_with_minimum_timestamp ( AVFormatContext * s )

static

Definition at line 684 of file imfdec.c.

Referenced by imf_read_packet().

◆ get_resource_context_for_timestamp()

static int get_resource_context_for_timestamp	(	AVFormatContext *	s,
		IMFVirtualTrackPlaybackCtx *	track,
		IMFVirtualTrackResourcePlaybackCtx **	resource
	)

static

Definition at line 709 of file imfdec.c.

Referenced by imf_read_packet().

◆ imf_read_packet()

static int imf_read_packet	(	AVFormatContext *	s,
		AVPacket *	pkt
	)

static

Definition at line 757 of file imfdec.c.

◆ imf_close()

static int imf_close ( AVFormatContext * s )

static

Definition at line 873 of file imfdec.c.

◆ imf_probe()

static int imf_probe ( const AVProbeData * p )

static

Definition at line 893 of file imfdec.c.

◆ coherent_ts()

static int coherent_ts	(	int64_t	ts,
		AVRational	in_tb,
		AVRational	out_tb
	)

static

Definition at line 907 of file imfdec.c.

Referenced by imf_seek().

◆ imf_seek()

static int imf_seek	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	min_ts,
		int64_t	ts,
		int64_t	max_ts,
		int	flags
	)

static

Definition at line 921 of file imfdec.c.

Variable Documentation

◆ imf_options

const AVOption imf_options[]

static

Initial value:

= {
    {
        .name        = "assetmaps",
        .help        = "Comma-separated paths to ASSETMAP files."
                       "If not specified, the `ASSETMAP.xml` file in the same "
                       "directory as the CPL is used.",
        .offset      = 0x42,
        .type        = AV_OPT_TYPE_STRING,
        .default_val = {.str = NULL},
        .flags       = AV_OPT_FLAG_DECODING_PARAM,
    },
    {NULL},
}

Definition at line 976 of file imfdec.c.

◆ imf_class

const AVClass imf_class

static

Initial value:

= {
    .class_name = "imf",
    .item_name  = av_default_item_name,
    .option     = imf_options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 990 of file imfdec.c.

◆ ff_imf_demuxer

const AVInputFormat ff_imf_demuxer

Initial value:

= {
    .name           = "imf",
    .long_name      = NULL_IF_CONFIG_SMALL("IMF (Interoperable Master Format)"),
    .flags          = AVFMT_EXPERIMENTAL | AVFMT_NO_BYTE_SEEK,
    .flags_internal = FF_FMT_INIT_CLEANUP,
    .priv_class     = &imf_class,
    .priv_data_size = sizeof(IMFContext),
    .read_probe     = imf_probe,
    .read_header    = imf_read_header,
    .read_packet    = imf_read_packet,
    .read_close     = imf_close,
    .read_seek2     = imf_seek,
}

Definition at line 997 of file imfdec.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ AVRATIONAL_FORMAT

◆ AVRATIONAL_ARG

Function Documentation

◆ imf_uri_is_url()

◆ imf_uri_is_unix_abs_path()

◆ imf_uri_is_dos_abs_path()

◆ imf_time_to_ts()

◆ parse_imf_asset_map_from_xml_dom()

◆ imf_asset_locator_map_init()

◆ imf_asset_locator_map_deinit()

◆ parse_assetmap()

◆ find_asset_map_locator()

◆ open_track_resource_context()

◆ open_track_file_resource()

◆ imf_virtual_track_playback_context_deinit()

◆ open_virtual_track()

◆ set_context_streams_from_tracks()

◆ open_cpl_tracks()

◆ imf_read_header()

◆ get_next_track_with_minimum_timestamp()

◆ get_resource_context_for_timestamp()

◆ imf_read_packet()

◆ imf_close()

◆ imf_probe()

◆ coherent_ts()

◆ imf_seek()

Variable Documentation

◆ imf_options

◆ imf_class

◆ ff_imf_demuxer