#include "libavcodec/smpte_436m.h"
#include "bytestream.h"
#include "libavcodec/packet.h"
#include "libavutil/avassert.h"
#include "libavutil/error.h"
#include "libavutil/intreadwrite.h"

Macros
#define	SMPTE_436M_ANC_ENTRY_HEADER_SIZE

Functions
static int	validate_smpte_436m_anc_wrapping_type (AVSmpte436mWrappingType wrapping_type)

static int	validate_smpte_436m_anc_payload_sample_coding (AVSmpte436mPayloadSampleCoding payload_sample_coding)

int	av_smpte_436m_coded_anc_validate (const AVSmpte436mCodedAnc *anc)
	Validate a AVSmpte436mCodedAnc structure. More...

static int	smpte_436m_anc_decode_entry (const uint8_t in, int size, AVSmpte436mCodedAnc anc)
	Decode an ANC packet. More...

static int	smpte_436m_anc_encode_entry (uint8_t out, int size, const AVSmpte436mCodedAnc anc)
	Encode an ANC packet. More...

int	av_smpte_436m_anc_encode (uint8_t out, int size, int anc_packet_count, const AVSmpte436mCodedAnc anc_packets)
	Encode ANC packets into a single AV_CODEC_ID_SMPTE_436M_ANC AVPacket's data. More...

int	av_smpte_436m_anc_append (AVPacket pkt, int anc_packet_count, const AVSmpte436mCodedAnc anc_packets)
	Append more ANC packets to a single AV_CODEC_ID_SMPTE_436M_ANC AVPacket's data. More...

int	av_smpte_436m_anc_iter_init (AVSmpte436mAncIterator iter, const uint8_t buf, int buf_size)
	Set up iteration over the ANC packets in a single AV_CODEC_ID_SMPTE_436M_ANC AVPacket's data. More...

int	av_smpte_436m_anc_iter_next (AVSmpte436mAncIterator iter, AVSmpte436mCodedAnc anc)
	Get the next ANC packet from the iterator, advancing the iterator. More...

int	av_smpte_436m_coded_anc_payload_size (AVSmpte436mPayloadSampleCoding sample_coding, uint16_t sample_count)
	Get the minimum number of bytes needed to store a AVSmpte436mCodedAnc payload. More...

int	av_smpte_291m_anc_8bit_decode (AVSmpte291mAnc8bit out, AVSmpte436mPayloadSampleCoding sample_coding, uint16_t sample_count, const uint8_t payload, void *log_ctx)
	Decode a AVSmpte436mCodedAnc payload into AVSmpte291mAnc8bit. More...

void	av_smpte_291m_anc_8bit_fill_checksum (AVSmpte291mAnc8bit *anc)
	Fill in the correct checksum for a AVSmpte291mAnc8bit. More...

int	av_smpte_291m_anc_8bit_get_sample_count (const AVSmpte291mAnc8bit anc, AVSmpte436mPayloadSampleCoding sample_coding, void log_ctx)
	Compute the sample count needed to encode a AVSmpte291mAnc8bit into a AVSmpte436mCodedAnc payload. More...

int	av_smpte_291m_anc_8bit_encode (AVSmpte436mCodedAnc out, uint16_t line_number, AVSmpte436mWrappingType wrapping_type, AVSmpte436mPayloadSampleCoding sample_coding, const AVSmpte291mAnc8bit payload, void *log_ctx)
	Encode a AVSmpte291mAnc8bit into a AVSmpte436mCodedAnc. More...

int	av_smpte_291m_anc_8bit_extract_cta_708 (const AVSmpte291mAnc8bit anc, uint8_t cc_data, void *log_ctx)
	Try to decode an ANC packet into EIA-608/CTA-708 data (AV_CODEC_ID_EIA_608). More...

Macro Definition Documentation

◆ SMPTE_436M_ANC_ENTRY_HEADER_SIZE

#define SMPTE_436M_ANC_ENTRY_HEADER_SIZE

Value:

    ( \
    2   /* line_number */                  \
    + 1 /* wrapping_type */                \
    + 1 /* payload_sample_coding */        \
    + 2 /* payload_sample_count */         \
    + 4 /* payload_array_length */         \
    + 4 /* payload_array_element_size */   \
)

Definition at line 89 of file smpte_436m.c.

Function Documentation

◆ validate_smpte_436m_anc_wrapping_type()

static int validate_smpte_436m_anc_wrapping_type ( AVSmpte436mWrappingType wrapping_type )

static

Definition at line 29 of file smpte_436m.c.

Referenced by av_smpte_436m_coded_anc_validate().

◆ validate_smpte_436m_anc_payload_sample_coding()

static int validate_smpte_436m_anc_payload_sample_coding ( AVSmpte436mPayloadSampleCoding payload_sample_coding )

static

Definition at line 46 of file smpte_436m.c.

Referenced by av_smpte_436m_coded_anc_validate().

◆ av_smpte_436m_coded_anc_validate()

int av_smpte_436m_coded_anc_validate ( const AVSmpte436mCodedAnc * anc )

Validate a AVSmpte436mCodedAnc structure.

Doesn't check if the payload is valid.

Parameters

[in] anc ANC packet to validate

Returns: 0 on success, AVERROR codes otherwise.

Definition at line 69 of file smpte_436m.c.

Referenced by smpte_436m_anc_decode_entry().

◆ smpte_436m_anc_decode_entry()

static int smpte_436m_anc_decode_entry	(	const uint8_t *	in,
		int	size,
		AVSmpte436mCodedAnc *	anc
	)

static

Decode an ANC packet.

Parameters

[in]	in	Input bytes.
[in]	size	the size of in.
[out]	anc	the decoded ANC packet

Returns: The number of read bytes on success, AVERROR_INVALIDDATA otherwise.

Definition at line 105 of file smpte_436m.c.

Referenced by av_smpte_436m_anc_iter_next().

◆ smpte_436m_anc_encode_entry()

static int smpte_436m_anc_encode_entry	(	uint8_t *	out,
		int	size,
		const AVSmpte436mCodedAnc *	anc
	)

static

Encode an ANC packet.

Parameters

[in]	anc	the ANC packet to encode
[in]	size	the size of out. ignored if out is NULL.
[out]	out	Output bytes. Doesn't write anything if out is NULL.

Returns: the number of bytes written on success, AVERROR codes otherwise. If out is NULL, returns the number of bytes it would have written.

Definition at line 146 of file smpte_436m.c.

Referenced by av_smpte_436m_anc_append(), and av_smpte_436m_anc_encode().

◆ av_smpte_436m_anc_encode()

int av_smpte_436m_anc_encode	(	uint8_t *	out,
		int	size,
		int	anc_packet_count,
		const AVSmpte436mCodedAnc *	anc_packets
	)

Encode ANC packets into a single AV_CODEC_ID_SMPTE_436M_ANC AVPacket's data.

Parameters

[in]	anc_packet_count	number of ANC packets to encode
[in]	anc_packets	the ANC packets to encode
[in]	size	the size of out. ignored if out is NULL.
[out]	out	Output bytes. Doesn't write anything if out is NULL.

Returns: the number of bytes written on success, AVERROR codes otherwise. If out is NULL, returns the number of bytes it would have written.

Definition at line 173 of file smpte_436m.c.

Referenced by ff_eia608_to_smpte436m_filter().

◆ av_smpte_436m_anc_append()

int av_smpte_436m_anc_append	(	struct AVPacket *	pkt,
		int	anc_packet_count,
		const AVSmpte436mCodedAnc *	anc_packets
	)

Append more ANC packets to a single AV_CODEC_ID_SMPTE_436M_ANC AVPacket's data.

Parameters

[in]	anc_packet_count	number of ANC packets to encode
[in]	anc_packets	the ANC packets to encode
	pkt	the AVPacket to append to. it must either be size 0 or contain valid SMPTE_436M_ANC data.

Returns: 0 on success, AVERROR codes otherwise.

Definition at line 201 of file smpte_436m.c.

Referenced by mcc_read_header().

◆ av_smpte_436m_anc_iter_init()

int av_smpte_436m_anc_iter_init	(	AVSmpte436mAncIterator *	iter,
		const uint8_t *	buf,
		int	buf_size
	)

Set up iteration over the ANC packets in a single AV_CODEC_ID_SMPTE_436M_ANC AVPacket's data.

Parameters

[in]	buf	Pointer to the data from a AV_CODEC_ID_SMPTE_436M_ANC AVPacket.
[in]	buf_size	Size of the data from a AV_CODEC_ID_SMPTE_436M_ANC AVPacket.
[out]	iter	Pointer to the iterator.

Returns: 0 on success, AVERROR codes otherwise.

Definition at line 234 of file smpte_436m.c.

Referenced by ff_smpte436m_to_eia608_filter(), and mcc_write_packet().

◆ av_smpte_436m_anc_iter_next()

int av_smpte_436m_anc_iter_next	(	AVSmpte436mAncIterator *	iter,
		AVSmpte436mCodedAnc *	anc
	)

Get the next ANC packet from the iterator, advancing the iterator.

Parameters

[in,out]	iter	Pointer to the iterator.
[out]	anc	The returned ANC packet.

Returns: 0 on success, AVERROR_EOF when the iterator has reached the end, AVERROR codes otherwise.

Definition at line 250 of file smpte_436m.c.

Referenced by ff_smpte436m_to_eia608_filter(), and mcc_write_packet().

◆ av_smpte_436m_coded_anc_payload_size()

int av_smpte_436m_coded_anc_payload_size	(	AVSmpte436mPayloadSampleCoding	sample_coding,
		uint16_t	sample_count
	)

Get the minimum number of bytes needed to store a AVSmpte436mCodedAnc payload.

Parameters

sample_coding	the payload sample coding
sample_count	the number of samples stored in the payload

Returns: returns the minimum number of bytes needed, on error returns < 0. always <= SMPTE_436M_CODED_ANC_PAYLOAD_CAPACITY

Definition at line 265 of file smpte_436m.c.

Referenced by av_smpte_291m_anc_8bit_encode(), and av_smpte_436m_coded_anc_validate().

◆ av_smpte_291m_anc_8bit_decode()

int av_smpte_291m_anc_8bit_decode	(	AVSmpte291mAnc8bit *	out,
		AVSmpte436mPayloadSampleCoding	sample_coding,
		uint16_t	sample_count,
		const uint8_t *	payload,
		void *	log_ctx
	)

Decode a AVSmpte436mCodedAnc payload into AVSmpte291mAnc8bit.

Parameters

[in]	sample_coding	the payload sample coding
[in]	sample_count	the number of samples stored in the payload
[in]	payload	the bytes storing the payload, the needed size can be obtained from avpriv_smpte_436m_coded_anc_payload_size
[in]	log_ctx	context pointer for av_log
[out]	out	The decoded ANC packet.

Returns: returns 0 on success, otherwise < 0.

Definition at line 295 of file smpte_436m.c.

Referenced by ff_smpte436m_to_eia608_filter(), mcc_read_header(), and mcc_write_packet().

◆ av_smpte_291m_anc_8bit_fill_checksum()

void av_smpte_291m_anc_8bit_fill_checksum ( AVSmpte291mAnc8bit * anc )

Fill in the correct checksum for a AVSmpte291mAnc8bit.

Parameters

[in,out] anc The ANC packet.

Definition at line 337 of file smpte_436m.c.

Referenced by av_smpte_291m_anc_8bit_decode(), and ff_eia608_to_smpte436m_filter().

◆ av_smpte_291m_anc_8bit_get_sample_count()

int av_smpte_291m_anc_8bit_get_sample_count	(	const AVSmpte291mAnc8bit *	anc,
		AVSmpte436mPayloadSampleCoding	sample_coding,
		void *	log_ctx
	)

Compute the sample count needed to encode a AVSmpte291mAnc8bit into a AVSmpte436mCodedAnc payload.

Parameters

[in]	anc	The ANC packet.
[in]	sample_coding	The sample coding.
[in]	log_ctx	context pointer for av_log

Returns: returns the sample count on success, otherwise < 0.

Definition at line 346 of file smpte_436m.c.

Referenced by av_smpte_291m_anc_8bit_encode().

◆ av_smpte_291m_anc_8bit_encode()

int av_smpte_291m_anc_8bit_encode	(	AVSmpte436mCodedAnc *	out,
		uint16_t	line_number,
		AVSmpte436mWrappingType	wrapping_type,
		AVSmpte436mPayloadSampleCoding	sample_coding,
		const AVSmpte291mAnc8bit *	payload,
		void *	log_ctx
	)

Encode a AVSmpte291mAnc8bit into a AVSmpte436mCodedAnc.

Parameters

[in]	line_number	the line number the ANC packet is on
[in]	wrapping_type	the wrapping type
[in]	sample_coding	the payload sample coding
[in]	payload	the ANC packet to encode.
[in]	log_ctx	context pointer for av_log
[out]	out	The encoded ANC packet.

Returns: returns 0 on success, otherwise < 0.

Definition at line 375 of file smpte_436m.c.

Referenced by ff_eia608_to_smpte436m_filter(), and ff_eia608_to_smpte436m_init().

◆ av_smpte_291m_anc_8bit_extract_cta_708()

int av_smpte_291m_anc_8bit_extract_cta_708	(	const AVSmpte291mAnc8bit *	anc,
		uint8_t *	cc_data,
		void *	log_ctx
	)

Try to decode an ANC packet into EIA-608/CTA-708 data (AV_CODEC_ID_EIA_608).

This

Parameters

[in]	anc	The ANC packet.
[in]	log_ctx	Context pointer for av_log
[out]	cc_data	the buffer to store the extracted EIA-608/CTA-708 data, you can pass NULL to not store the data. the required size is 3 * cc_count bytes. SMPTE_291M_ANC_PAYLOAD_CAPACITY is always enough size.

Returns: returns cc_count (>= 0) on success, AVERROR(EAGAIN) if it wasn't a CTA-708 ANC packet, < 0 on error.

Definition at line 433 of file smpte_436m.c.

Referenced by ff_smpte436m_to_eia608_filter(), and mcc_read_header().

Macros

Functions

Macro Definition Documentation

◆ SMPTE_436M_ANC_ENTRY_HEADER_SIZE

Function Documentation

◆ validate_smpte_436m_anc_wrapping_type()

◆ validate_smpte_436m_anc_payload_sample_coding()

◆ av_smpte_436m_coded_anc_validate()

◆ smpte_436m_anc_decode_entry()

◆ smpte_436m_anc_encode_entry()

◆ av_smpte_436m_anc_encode()

◆ av_smpte_436m_anc_append()

◆ av_smpte_436m_anc_iter_init()

◆ av_smpte_436m_anc_iter_next()

◆ av_smpte_436m_coded_anc_payload_size()

◆ av_smpte_291m_anc_8bit_decode()

◆ av_smpte_291m_anc_8bit_fill_checksum()

◆ av_smpte_291m_anc_8bit_get_sample_count()

◆ av_smpte_291m_anc_8bit_encode()

◆ av_smpte_291m_anc_8bit_extract_cta_708()