#include "movenc.h"
#include "libavutil/intreadwrite.h"
#include "internal.h"
#include "rtpenc_chain.h"
#include "avio_internal.h"
#include "rtp.h"

Include dependency graph for movenchint.c:

Functions
int	ff_mov_init_hinting (AVFormatContext *s, int index, int src_index)

static void	sample_queue_pop (HintSampleQueue *queue)
	Remove the first sample from the sample queue. More...

static void	sample_queue_free (HintSampleQueue *queue)
	Empty the sample queue, releasing all memory. More...

static void	sample_queue_push (HintSampleQueue queue, uint8_t data, int size, int sample)
	Add a reference to the sample data to the sample queue. More...

static void	sample_queue_retain (HintSampleQueue *queue)
	Make local copies of all referenced sample data in the queue. More...

static int	match_segments (const uint8_t haystack, int h_len, const uint8_t needle, int n_pos, int n_len, int match_h_offset_ptr, int match_n_offset_ptr, int *match_len_ptr)
	Find matches of needle[n_pos ->] within haystack. More...

static int	find_sample_match (const uint8_t data, int len, HintSampleQueue queue, int pos, int match_sample, int match_offset, int match_len)
	Look for segments in samples in the sample queue matching the data in ptr. More...

static void	output_immediate (const uint8_t data, int size, AVIOContext out, int *entries)

static void	output_match (AVIOContext out, int match_sample, int match_offset, int match_len, int entries)

static void	describe_payload (const uint8_t data, int size, AVIOContext out, int entries, HintSampleQueue queue)

static int	write_hint_packets (AVIOContext out, const uint8_t data, int size, MOVTrack trk, int64_t pts)
	Write an RTP hint (that may contain one or more RTP packets) for the packets in data. More...

int	ff_mov_add_hinted_packet (AVFormatContext s, AVPacket pkt, int track_index, int sample, uint8_t *sample_data, int sample_size)

void	ff_mov_close_hinting (MOVTrack *track)

Function Documentation

static void describe_payload	(	const uint8_t *	data,
		int	size,
		AVIOContext *	out,
		int *	entries,
		HintSampleQueue *	queue
	)

static

Definition at line 283 of file movenchint.c.

Referenced by write_hint_packets().

int ff_mov_add_hinted_packet	(	AVFormatContext *	s,
		AVPacket *	pkt,
		int	track_index,
		int	sample,
		uint8_t *	sample_data,
		int	sample_size
	)

Definition at line 390 of file movenchint.c.

Referenced by ff_mov_write_packet().

void ff_mov_close_hinting ( MOVTrack * track )

Definition at line 448 of file movenchint.c.

Referenced by mov_write_trailer().

int ff_mov_init_hinting	(	AVFormatContext *	s,
		int	index,
		int	src_index
	)

Definition at line 29 of file movenchint.c.

Referenced by mov_write_header().

static int find_sample_match	(	const uint8_t *	data,
		int	len,
		HintSampleQueue *	queue,
		int *	pos,
		int *	match_sample,
		int *	match_offset,
		int *	match_len
	)

static

Look for segments in samples in the sample queue matching the data in ptr.

Samples not matching are removed from the queue. If a match is found, the next time it will look for matches starting from the end of the previous matched segment.

Parameters

data	data to find matches for in the sample queue
len	length of the data buffer
queue	samples used for looking for matching segments
pos	the offset in data of the matched segment
match_sample	the number of the sample that contained the match
match_offset	the offset of the matched segment within the sample
match_len	the length of the matched segment

Returns: 0 if a match was found, < 0 if no match was found

Definition at line 215 of file movenchint.c.

Referenced by describe_payload().

static int match_segments	(	const uint8_t *	haystack,
		int	h_len,
		const uint8_t *	needle,
		int	n_pos,
		int	n_len,
		int *	match_h_offset_ptr,
		int *	match_n_offset_ptr,
		int *	match_len_ptr
	)

static

Find matches of needle[n_pos ->] within haystack.

If a sufficiently large match is found, matching bytes before n_pos are included in the match, too (within the limits of the arrays).

Parameters

haystack	buffer that may contain parts of needle
h_len	length of the haystack buffer
needle	buffer containing source data that have been used to construct haystack
n_pos	start position in needle used for looking for matches
n_len	length of the needle buffer
match_h_offset_ptr	offset of the first matching byte within haystack
match_n_offset_ptr	offset of the first matching byte within needle
match_len_ptr	length of the matched segment

Returns: 0 if a match was found, < 0 if no match was found

Definition at line 163 of file movenchint.c.

Referenced by find_sample_match().

static void output_immediate	(	const uint8_t *	data,
		int	size,
		AVIOContext *	out,
		int *	entries
	)

static

Definition at line 250 of file movenchint.c.

Referenced by describe_payload().

static void output_match	(	AVIOContext *	out,
		int	match_sample,
		int	match_offset,
		int	match_len,
		int *	entries
	)

static

Definition at line 270 of file movenchint.c.

Referenced by describe_payload().

static void sample_queue_free ( HintSampleQueue * queue )

static

Empty the sample queue, releasing all memory.

Definition at line 83 of file movenchint.c.

Referenced by ff_mov_close_hinting().

static void sample_queue_pop ( HintSampleQueue * queue )

static

Remove the first sample from the sample queue.

Definition at line 70 of file movenchint.c.

Referenced by find_sample_match().

static void sample_queue_push	(	HintSampleQueue *	queue,
		uint8_t *	data,
		int	size,
		int	sample
	)

static

Add a reference to the sample data to the sample queue.

The data is not copied. sample_queue_retain should be called before pkt->data is reused/freed.

Definition at line 99 of file movenchint.c.

Referenced by ff_mov_add_hinted_packet().

static void sample_queue_retain ( HintSampleQueue * queue )

static

Make local copies of all referenced sample data in the queue.

Definition at line 125 of file movenchint.c.

Referenced by ff_mov_add_hinted_packet().

static int write_hint_packets	(	AVIOContext *	out,
		const uint8_t *	data,
		int	size,
		MOVTrack *	trk,
		int64_t *	pts
	)

static

Write an RTP hint (that may contain one or more RTP packets) for the packets in data.

data contains one or more packets with a BE32 size header.

Parameters

out	buffer where the hints are written
data	buffer containing RTP packets
size	the size of the data buffer
trk	the MOVTrack for the hint track
pts	pointer where the timestamp for the written RTP hint is stored

Returns: the number of RTP packets in the written hint

Definition at line 315 of file movenchint.c.

Referenced by ff_mov_add_hinted_packet().

Paris Hackday Code

Functions

Function Documentation