Flash Screen Video Version 2 encoder. More...

#include <stdio.h>
#include <stdlib.h>
#include <zlib.h>
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "internal.h"
#include "put_bits.h"
#include "bytestream.h"

Include dependency graph for flashsv2enc.c:

Go to the source code of this file.

Data Structures
struct	Block

struct	Palette

struct	FlashSV2Context

Macros
#define	HAS_IFRAME_IMAGE 0x02

#define	HAS_PALLET_INFO 0x01

#define	COLORSPACE_BGR 0x00

#define	COLORSPACE_15_7 0x10

#define	HAS_DIFF_BLOCKS 0x04

#define	ZLIB_PRIME_COMPRESS_CURRENT 0x02

#define	ZLIB_PRIME_COMPRESS_PREVIOUS 0x01

#define	FLASHSV2_DUMB

Typedefs
typedef struct Block	Block

typedef struct Palette	Palette

typedef struct FlashSV2Context	FlashSV2Context

Functions
static av_cold void	cleanup (FlashSV2Context *s)

static void	init_blocks (FlashSV2Context s, Block blocks, uint8_t encbuf, uint8_t databuf)

static void	reset_stats (FlashSV2Context *s)

static av_cold int	flashsv2_encode_init (AVCodecContext *avctx)

static int	new_key_frame (FlashSV2Context *s)

static int	write_palette (FlashSV2Context s, uint8_t buf, int buf_size)

static int	write_header (FlashSV2Context s, uint8_t buf, int buf_size)

static int	write_block (Block b, uint8_t buf, int buf_size)

static int	encode_zlib (Block b, uint8_t buf, unsigned long *buf_size, int comp)

static int	encode_zlibprime (Block b, Block prime, uint8_t buf, int buf_size, int comp)

static int	encode_bgr (Block b, const uint8_t src, int stride)

static unsigned	pixel_color15 (const uint8_t *src)

static unsigned int	chroma_diff (unsigned int c1, unsigned int c2)

static int	pixel_color7_fast (Palette *palette, unsigned c15)

static int	pixel_color7_slow (Palette *palette, unsigned color)

static unsigned	pixel_bgr (const uint8_t *src)

static int	write_pixel_15_7 (Palette palette, uint8_t dest, const uint8_t *src, int dist)

static int	update_palette_index (Palette *palette)

static int	generate_default_palette (Palette *palette)

static int	generate_optimum_palette (Palette palette, const uint8_t image, int width, int height, int stride)

static int	encode_15_7_sl (Palette palette, uint8_t dest, const uint8_t *src, int width, int dist)

static int	encode_15_7 (Palette palette, Block b, const uint8_t *src, int stride, int dist)

static int	encode_block (FlashSV2Context s, Palette palette, Block b, Block prev, const uint8_t *src, int stride, int comp, int dist, int keyframe)

static int	compare_sl (FlashSV2Context s, Block b, const uint8_t src, uint8_t frame, uint8_t *key, int y, int keyframe)

static int	mark_all_blocks (FlashSV2Context s, const uint8_t src, int stride, int keyframe)

static int	encode_all_blocks (FlashSV2Context *s, int keyframe)

static int	write_all_blocks (FlashSV2Context s, uint8_t buf, int buf_size)

static int	write_bitstream (FlashSV2Context s, const uint8_t src, int stride, uint8_t *buf, int buf_size, int keyframe)

static void	recommend_keyframe (FlashSV2Context s, int keyframe)

static int	optimum_block_width (FlashSV2Context *s)

static int	optimum_block_height (FlashSV2Context *s)

static int	optimum_use15_7 (FlashSV2Context *s)

static int	optimum_dist (FlashSV2Context *s)

static int	reconfigure_at_keyframe (FlashSV2Context s, const uint8_t image, int stride)

static int	flashsv2_encode_frame (AVCodecContext avctx, AVPacket pkt, const AVFrame pict, int got_packet)

static av_cold int	flashsv2_encode_end (AVCodecContext *avctx)

Variables
static const unsigned int	default_screen_video_v2_palette [128]

static const double	block_size_fraction = 1.0 / 300

static const double	use15_7_threshold = 8192

static const double	color15_7_factor = 100

AVCodec	ff_flashsv2_encoder

Detailed Description

Flash Screen Video Version 2 encoder.

Author: Joshua Warner

Definition in file flashsv2enc.c.

Macro Definition Documentation

#define COLORSPACE_15_7 0x10

Definition at line 59 of file flashsv2enc.c.

Referenced by encode_all_blocks(), and encode_block().

#define COLORSPACE_BGR 0x00

Definition at line 58 of file flashsv2enc.c.

#define FLASHSV2_DUMB

Definition at line 66 of file flashsv2enc.c.

#define HAS_DIFF_BLOCKS 0x04

Definition at line 60 of file flashsv2enc.c.

Referenced by encode_all_blocks(), and write_block().

#define HAS_IFRAME_IMAGE 0x02

Definition at line 55 of file flashsv2enc.c.

#define HAS_PALLET_INFO 0x01

Definition at line 56 of file flashsv2enc.c.

Referenced by write_header().

#define ZLIB_PRIME_COMPRESS_CURRENT 0x02

Definition at line 61 of file flashsv2enc.c.

Referenced by write_block().

#define ZLIB_PRIME_COMPRESS_PREVIOUS 0x01

Definition at line 62 of file flashsv2enc.c.

Referenced by encode_block().

Typedef Documentation

typedef struct Block Block

typedef struct FlashSV2Context FlashSV2Context

typedef struct Palette Palette

Function Documentation

static unsigned int chroma_diff	(	unsigned int	c1,
		unsigned int	c2
	)

inlinestatic

Definition at line 414 of file flashsv2enc.c.

Referenced by pixel_color7_slow(), and write_pixel_15_7().

static av_cold void cleanup ( FlashSV2Context * s )

static

Definition at line 128 of file flashsv2enc.c.

Referenced by flashsv2_encode_end(), flashsv2_encode_init(), and open_input().

static int compare_sl	(	FlashSV2Context *	s,
		Block *	b,
		const uint8_t *	src,
		uint8_t *	frame,
		uint8_t *	key,
		int	y,
		int	keyframe
	)

static

Definition at line 589 of file flashsv2enc.c.

Referenced by mark_all_blocks().

static int encode_15_7	(	Palette *	palette,
		Block *	b,
		const uint8_t *	src,
		int	stride,
		int	dist
	)

static

Definition at line 535 of file flashsv2enc.c.

Referenced by encode_block().

static int encode_15_7_sl	(	Palette *	palette,
		uint8_t *	dest,
		const uint8_t *	src,
		int	width,
		int	dist
	)

inlinestatic

Definition at line 525 of file flashsv2enc.c.

Referenced by encode_15_7().

static int encode_all_blocks	(	FlashSV2Context *	s,
		int	keyframe
	)

static

Definition at line 628 of file flashsv2enc.c.

Referenced by write_bitstream().

static int encode_bgr	(	Block *	b,
		const uint8_t *	src,
		int	stride
	)

static

Definition at line 393 of file flashsv2enc.c.

Referenced by encode_block().

static int encode_block	(	FlashSV2Context *	s,
		Palette *	palette,
		Block *	b,
		Block *	prev,
		const uint8_t *	src,
		int	stride,
		int	comp,
		int	dist,
		int	keyframe
	)

static

Definition at line 552 of file flashsv2enc.c.

Referenced by encode_all_blocks().

static int encode_zlib	(	Block *	b,
		uint8_t *	buf,
		unsigned long *	buf_size,
		int	comp
	)

static

Definition at line 353 of file flashsv2enc.c.

Referenced by encode_block().

static int encode_zlibprime	(	Block *	b,
		Block *	prime,
		uint8_t *	buf,
		int *	buf_size,
		int	comp
	)

static

Definition at line 359 of file flashsv2enc.c.

Referenced by encode_block().

static av_cold int flashsv2_encode_end ( AVCodecContext * avctx )

static

Definition at line 912 of file flashsv2enc.c.

static int flashsv2_encode_frame	(	AVCodecContext *	avctx,
		AVPacket *	pkt,
		const AVFrame *	pict,
		int *	got_packet
	)

static

Definition at line 851 of file flashsv2enc.c.

static av_cold int flashsv2_encode_init ( AVCodecContext * avctx )

static

Definition at line 178 of file flashsv2enc.c.

static int generate_default_palette ( Palette * palette )

static

Definition at line 510 of file flashsv2enc.c.

Referenced by reconfigure_at_keyframe().

static int generate_optimum_palette	(	Palette *	palette,
		const uint8_t *	image,
		int	width,
		int	height,
		int	stride
	)

static

Definition at line 518 of file flashsv2enc.c.

Referenced by reconfigure_at_keyframe().

static void init_blocks	(	FlashSV2Context *	s,
		Block *	blocks,
		uint8_t *	encbuf,
		uint8_t *	databuf
	)

static

Definition at line 141 of file flashsv2enc.c.

Referenced by flashsv2_encode_init(), and reconfigure_at_keyframe().

static int mark_all_blocks	(	FlashSV2Context *	s,
		const uint8_t *	src,
		int	stride,
		int	keyframe
	)

static

Definition at line 607 of file flashsv2enc.c.

Referenced by write_bitstream().

static int new_key_frame ( FlashSV2Context * s )

static

Definition at line 260 of file flashsv2enc.c.

Referenced by flashsv2_encode_frame().

static int optimum_block_height ( FlashSV2Context * s )

static

Definition at line 749 of file flashsv2enc.c.

Referenced by reconfigure_at_keyframe().

static int optimum_block_width ( FlashSV2Context * s )

static

Definition at line 737 of file flashsv2enc.c.

Referenced by reconfigure_at_keyframe().

static int optimum_dist ( FlashSV2Context * s )

static

Definition at line 780 of file flashsv2enc.c.

Referenced by flashsv2_encode_frame().

static int optimum_use15_7 ( FlashSV2Context * s )

static

Definition at line 763 of file flashsv2enc.c.

Referenced by reconfigure_at_keyframe().

static unsigned pixel_bgr ( const uint8_t * src )

inlinestatic

Definition at line 444 of file flashsv2enc.c.

Referenced by write_pixel_15_7().

static unsigned pixel_color15 ( const uint8_t * src )

inlinestatic

Definition at line 409 of file flashsv2enc.c.

Referenced by write_pixel_15_7().

static int pixel_color7_fast	(	Palette *	palette,
		unsigned	c15
	)

inlinestatic

Definition at line 424 of file flashsv2enc.c.

Referenced by write_pixel_15_7().

static int pixel_color7_slow	(	Palette *	palette,
		unsigned	color
	)

static

Definition at line 429 of file flashsv2enc.c.

Referenced by update_palette_index().

static void recommend_keyframe	(	FlashSV2Context *	s,
		int *	keyframe
	)

static

Definition at line 715 of file flashsv2enc.c.

Referenced by flashsv2_encode_frame().

static int reconfigure_at_keyframe	(	FlashSV2Context *	s,
		const uint8_t *	image,
		int	stride
	)

static

Definition at line 795 of file flashsv2enc.c.

Referenced by flashsv2_encode_frame().

static void reset_stats ( FlashSV2Context * s )

static

Definition at line 167 of file flashsv2enc.c.

Referenced by flashsv2_encode_init(), and reconfigure_at_keyframe().

static int update_palette_index ( Palette * palette )

static

Definition at line 467 of file flashsv2enc.c.

Referenced by generate_default_palette().

static int write_all_blocks	(	FlashSV2Context *	s,
		uint8_t *	buf,
		int	buf_size
	)

static

Definition at line 668 of file flashsv2enc.c.

Referenced by write_bitstream().

static int write_bitstream	(	FlashSV2Context *	s,
		const uint8_t *	src,
		int	stride,
		uint8_t *	buf,
		int	buf_size,
		int	keyframe
	)

static

Definition at line 686 of file flashsv2enc.c.

Referenced by flashsv2_encode_frame().

static int write_block	(	Block *	b,
		uint8_t *	buf,
		int	buf_size
	)

static

Definition at line 313 of file flashsv2enc.c.

Referenced by write_all_blocks().

static int write_header	(	FlashSV2Context *	s,
		uint8_t *	buf,
		int	buf_size
	)

static

Definition at line 283 of file flashsv2enc.c.

Referenced by write_bitstream().

static int write_palette	(	FlashSV2Context *	s,
		uint8_t *	buf,
		int	buf_size
	)

static

Definition at line 277 of file flashsv2enc.c.

Referenced by write_header().

static int write_pixel_15_7	(	Palette *	palette,
		uint8_t *	dest,
		const uint8_t *	src,
		int	dist
	)

static

Definition at line 449 of file flashsv2enc.c.

Referenced by encode_15_7_sl().

Variable Documentation

const double block_size_fraction = 1.0 / 300

static

Definition at line 736 of file flashsv2enc.c.

Referenced by optimum_block_height(), and optimum_block_width().

const double color15_7_factor = 100

static

Definition at line 778 of file flashsv2enc.c.

Referenced by optimum_dist().

const unsigned int default_screen_video_v2_palette[128]

static

Initial value:

= {
    0x00000000, 0x00333333, 0x00666666, 0x00999999, 0x00CCCCCC, 0x00FFFFFF,
    0x00330000, 0x00660000, 0x00990000, 0x00CC0000, 0x00FF0000, 0x00003300,
    0x00006600, 0x00009900, 0x0000CC00, 0x0000FF00, 0x00000033, 0x00000066,
    0x00000099, 0x000000CC, 0x000000FF, 0x00333300, 0x00666600, 0x00999900,
    0x00CCCC00, 0x00FFFF00, 0x00003333, 0x00006666, 0x00009999, 0x0000CCCC,
    0x0000FFFF, 0x00330033, 0x00660066, 0x00990099, 0x00CC00CC, 0x00FF00FF,
    0x00FFFF33, 0x00FFFF66, 0x00FFFF99, 0x00FFFFCC, 0x00FF33FF, 0x00FF66FF,
    0x00FF99FF, 0x00FFCCFF, 0x0033FFFF, 0x0066FFFF, 0x0099FFFF, 0x00CCFFFF,
    0x00CCCC33, 0x00CCCC66, 0x00CCCC99, 0x00CCCCFF, 0x00CC33CC, 0x00CC66CC,
    0x00CC99CC, 0x00CCFFCC, 0x0033CCCC, 0x0066CCCC, 0x0099CCCC, 0x00FFCCCC,
    0x00999933, 0x00999966, 0x009999CC, 0x009999FF, 0x00993399, 0x00996699,
    0x0099CC99, 0x0099FF99, 0x00339999, 0x00669999, 0x00CC9999, 0x00FF9999,
    0x00666633, 0x00666699, 0x006666CC, 0x006666FF, 0x00663366, 0x00669966,
    0x0066CC66, 0x0066FF66, 0x00336666, 0x00996666, 0x00CC6666, 0x00FF6666,
    0x00333366, 0x00333399, 0x003333CC, 0x003333FF, 0x00336633, 0x00339933,
    0x0033CC33, 0x0033FF33, 0x00663333, 0x00993333, 0x00CC3333, 0x00FF3333,
    0x00003366, 0x00336600, 0x00660033, 0x00006633, 0x00330066, 0x00663300,
    0x00336699, 0x00669933, 0x00993366, 0x00339966, 0x00663399, 0x00996633,
    0x006699CC, 0x0099CC66, 0x00CC6699, 0x0066CC99, 0x009966CC, 0x00CC9966,
    0x0099CCFF, 0x00CCFF99, 0x00FF99CC, 0x0099FFCC, 0x00CC99FF, 0x00FFCC99,
    0x00111111, 0x00222222, 0x00444444, 0x00555555, 0x00AAAAAA, 0x00BBBBBB,
    0x00DDDDDD, 0x00EEEEEE
}

Definition at line 485 of file flashsv2enc.c.

Referenced by generate_default_palette().

AVCodec ff_flashsv2_encoder

Initial value:

= {
    .name           = "flashsv2",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_FLASHSV2,
    .priv_data_size = sizeof(FlashSV2Context),
    .init           = flashsv2_encode_init,
    .encode2        = flashsv2_encode_frame,
    .close          = flashsv2_encode_end,
    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE },
    .long_name      = NULL_IF_CONFIG_SMALL("Flash Screen Video Version 2"),
}

Definition at line 921 of file flashsv2enc.c.

const double use15_7_threshold = 8192

static

Definition at line 761 of file flashsv2enc.c.

Paris Hackday Code

Data Structures

Macros

Typedefs

Functions

Variables

Detailed Description

Macro Definition Documentation

Typedef Documentation

Function Documentation

Variable Documentation