swscale.c File Reference

#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/bswap.h"
#include "libavutil/common.h"
#include "libavutil/cpu.h"
#include "libavutil/emms.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/pixdesc.h"
#include "config.h"
#include "swscale_internal.h"
#include "swscale.h"

Go to the source code of this file.

Macros
#define	DEBUG_SWSCALE_BUFFERS   0
#define	DEBUG_BUFFERS(...)
#define	RGB2YUV_SHIFT   15
#define	BY   ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define	BV   (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define	BU   ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define	GY   ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define	GV   (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define	GU   (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define	RY   ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define	RV   ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define	RU   (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

Functions
static av_always_inline void	fillPlane (uint8_t *plane, int stride, int width, int height, int y, uint8_t val)
static void	hScale16To19_c (SwsInternal *c, int16_t *_dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void	hScale16To15_c (SwsInternal *c, int16_t *dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void	hScale8To15_c (SwsInternal *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void	hScale8To19_c (SwsInternal *c, int16_t *_dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void	chrRangeToJpeg_c (int16_t *dstU, int16_t *dstV, int width)
static void	chrRangeFromJpeg_c (int16_t *dstU, int16_t *dstV, int width)
static void	lumRangeToJpeg_c (int16_t *dst, int width)
static void	lumRangeFromJpeg_c (int16_t *dst, int width)
static void	chrRangeToJpeg16_c (int16_t *_dstU, int16_t *_dstV, int width)
static void	chrRangeFromJpeg16_c (int16_t *_dstU, int16_t *_dstV, int width)
static void	lumRangeToJpeg16_c (int16_t *_dst, int width)
static void	lumRangeFromJpeg16_c (int16_t *_dst, int width)
int	ff_swscale (SwsInternal *c, const uint8_t *const src[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[], int dstSliceY, int dstSliceH)
av_cold void	ff_sws_init_range_convert (SwsInternal *c)
static av_cold void	sws_init_swscale (SwsInternal *c)
void	ff_sws_init_scale (SwsInternal *c)
static void	reset_ptr (const uint8_t *src[], enum AVPixelFormat format)
static int	check_image_pointers (const uint8_t *const data[4], enum AVPixelFormat pix_fmt, const int linesizes[4])
void	ff_xyz12Torgb48 (const SwsInternal *c, uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int w, int h)
void	ff_rgb48Toxyz12 (const SwsInternal *c, uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int w, int h)
void	ff_update_palette (SwsInternal *c, const uint32_t *pal)
static int	scale_internal (SwsContext *sws, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH)
static int	scale_gamma (SwsInternal *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH)
static int	scale_cascaded (SwsInternal *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH)
void	sws_frame_end (SwsContext *sws)
	Finish the scaling process for a pair of source/destination frames previously submitted with sws_frame_start(). More...
int	sws_frame_start (SwsContext *sws, AVFrame *dst, const AVFrame *src)
	Initialize the scaling process for a given pair of source/destination frames. More...
int	sws_send_slice (SwsContext *sws, unsigned int slice_start, unsigned int slice_height)
	Indicate that a horizontal slice of input data is available in the source frame previously provided to sws_frame_start(). More...
unsigned int	sws_receive_slice_alignment (const SwsContext *sws)
	Get the alignment required for slices. More...
int	sws_receive_slice (SwsContext *sws, unsigned int slice_start, unsigned int slice_height)
	Request a horizontal slice of the output data to be written into the frame previously provided to sws_frame_start(). More...
int	sws_scale_frame (SwsContext *sws, AVFrame *dst, const AVFrame *src)
	Scale source data from src and write the output to dst. More...
int attribute_align_arg	sws_scale (SwsContext *sws, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
	swscale wrapper, so we don't need to export the SwsContext. More...
void	ff_sws_slice_worker (void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)

Variables
const uint8_t	ff_dither_8x8_128 [9][8]
static const uint8_t	sws_pb_64 [8]

Macro Definition Documentation

DEBUG_SWSCALE_BUFFERS

#define DEBUG_SWSCALE_BUFFERS   0

Definition at line 231 of file swscale.c.

DEBUG_BUFFERS

#define DEBUG_BUFFERS

(

...

)

Value:

    if (DEBUG_SWSCALE_BUFFERS)                  \
        av_log(c, AV_LOG_DEBUG, __VA_ARGS__)

Definition at line 232 of file swscale.c.

RGB2YUV_SHIFT

#define RGB2YUV_SHIFT   15

BY

#define BY   ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

BV

#define BV   (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

BU

#define BU   ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

GY

#define GY   ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

GV

#define GV   (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

GU

#define GU   (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

RY

#define RY   ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

RV

#define RV   ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

RU

#define RU   (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))

Function Documentation

fillPlane()

static av_always_inline void fillPlane ( uint8_t *  plane, int  stride, int  width, int  height, int  y, uint8_t  val  )

static

Definition at line 54 of file swscale.c.

Referenced by ff_swscale().

hScale16To19_c()

static void hScale16To19_c ( SwsInternal *  c, int16_t *  _dst, int  dstW, const uint8_t *  _src, const int16_t *  filter, const int32_t *  filterPos, int  filterSize  )

static

Definition at line 65 of file swscale.c.

Referenced by sws_init_swscale().

hScale16To15_c()

static void hScale16To15_c ( SwsInternal *  c, int16_t *  dst, int  dstW, const uint8_t *  _src, const int16_t *  filter, const int32_t *  filterPos, int  filterSize  )

static

Definition at line 95 of file swscale.c.

Referenced by sws_init_swscale().

hScale8To15_c()

static void hScale8To15_c ( SwsInternal *  c, int16_t *  dst, int  dstW, const uint8_t *  src, const int16_t *  filter, const int32_t *  filterPos, int  filterSize  )

static

Definition at line 124 of file swscale.c.

Referenced by sws_init_swscale().

hScale8To19_c()

static void hScale8To19_c ( SwsInternal *  c, int16_t *  _dst, int  dstW, const uint8_t *  src, const int16_t *  filter, const int32_t *  filterPos, int  filterSize  )

static

Definition at line 140 of file swscale.c.

Referenced by sws_init_swscale().

chrRangeToJpeg_c()

static void chrRangeToJpeg_c ( int16_t *  dstU, int16_t *  dstV, int  width  )

static

Definition at line 159 of file swscale.c.

Referenced by ff_sws_init_range_convert().

chrRangeFromJpeg_c()

static void chrRangeFromJpeg_c ( int16_t *  dstU, int16_t *  dstV, int  width  )

static

Definition at line 168 of file swscale.c.

Referenced by ff_sws_init_range_convert().

lumRangeToJpeg_c()

static void lumRangeToJpeg_c ( int16_t *  dst, int  width  )

static

Definition at line 177 of file swscale.c.

Referenced by ff_sws_init_range_convert().

lumRangeFromJpeg_c()

static void lumRangeFromJpeg_c ( int16_t *  dst, int  width  )

static

Definition at line 184 of file swscale.c.

Referenced by ff_sws_init_range_convert().

chrRangeToJpeg16_c()

static void chrRangeToJpeg16_c ( int16_t *  _dstU, int16_t *  _dstV, int  width  )

static

Definition at line 191 of file swscale.c.

Referenced by ff_sws_init_range_convert().

chrRangeFromJpeg16_c()

static void chrRangeFromJpeg16_c ( int16_t *  _dstU, int16_t *  _dstV, int  width  )

static

Definition at line 202 of file swscale.c.

Referenced by ff_sws_init_range_convert().

lumRangeToJpeg16_c()

static void lumRangeToJpeg16_c ( int16_t *  _dst, int  width  )

static

Definition at line 213 of file swscale.c.

Referenced by ff_sws_init_range_convert().

lumRangeFromJpeg16_c()

static void lumRangeFromJpeg16_c ( int16_t *  _dst, int  width  )

static

Definition at line 222 of file swscale.c.

Referenced by ff_sws_init_range_convert().

ff_swscale()

int ff_swscale	(	SwsInternal *	c,
		const uint8_t *const	src[],
		const int	srcStride[],
		int	srcSliceY,
		int	srcSliceH,
		uint8_t *const	dst[],
		const int	dstStride[],
		int	dstSliceY,
		int	dstSliceH
	)

Definition at line 236 of file swscale.c.

Referenced by scale_internal().

ff_sws_init_range_convert()

av_cold void ff_sws_init_range_convert

(

SwsInternal *

c

)

Definition at line 543 of file swscale.c.

Referenced by sws_init_swscale(), and sws_setColorspaceDetails().

sws_init_swscale()

static av_cold void sws_init_swscale ( SwsInternal *  c )

static

Definition at line 578 of file swscale.c.

Referenced by ff_sws_init_scale().

ff_sws_init_scale()

void ff_sws_init_scale

(

SwsInternal *

c

)

Definition at line 611 of file swscale.c.

Referenced by check_chrConvertRange(), check_hscale(), check_input_planar_rgb_to_a(), check_input_planar_rgb_to_uv(), check_input_planar_rgb_to_y(), check_lumConvertRange(), check_output_yuv2gbrp(), check_rgb_to_uv(), check_rgb_to_y(), check_yuv2yuv1(), check_yuv2yuvX(), and sws_init_single_context().

reset_ptr()

static void reset_ptr ( const uint8_t *  src[], enum AVPixelFormat  format  )

static

Definition at line 630 of file swscale.c.

Referenced by scale_internal().

check_image_pointers()

static int check_image_pointers ( const uint8_t *const  data[4], enum AVPixelFormat  pix_fmt, const int  linesizes[4]  )

static

Definition at line 642 of file swscale.c.

Referenced by scale_internal().

ff_xyz12Torgb48()

void ff_xyz12Torgb48	(	const SwsInternal *	c,
		uint8_t *	dst,
		int	dst_stride,
		const uint8_t *	src,
		int	src_stride,
		int	w,
		int	h
	)

Definition at line 659 of file swscale.c.

Referenced by scale_internal().

ff_rgb48Toxyz12()

void ff_rgb48Toxyz12	(	const SwsInternal *	c,
		uint8_t *	dst,
		int	dst_stride,
		const uint8_t *	src,
		int	src_stride,
		int	w,
		int	h
	)

Definition at line 718 of file swscale.c.

Referenced by scale_internal().

ff_update_palette()

void ff_update_palette	(	SwsInternal *	c,
		const uint32_t *	pal
	)

Definition at line 777 of file swscale.c.

Referenced by scale_internal().

scale_internal()

static int scale_internal ( SwsContext *  sws, const uint8_t *const  srcSlice[], const int  srcStride[], int  srcSliceY, int  srcSliceH, uint8_t *const  dstSlice[], const int  dstStride[], int  dstSliceY, int  dstSliceH  )

static

Definition at line 911 of file swscale.c.

Referenced by ff_sws_slice_worker(), scale_cascaded(), scale_gamma(), sws_receive_slice(), and sws_scale().

scale_gamma()

static int scale_gamma ( SwsInternal *  c, const uint8_t *const  srcSlice[], const int  srcStride[], int  srcSliceY, int  srcSliceH, uint8_t *const  dstSlice[], const int  dstStride[], int  dstSliceY, int  dstSliceH  )

static

Definition at line 858 of file swscale.c.

Referenced by scale_internal().

scale_cascaded()

static int scale_cascaded ( SwsInternal *  c, const uint8_t *const  srcSlice[], const int  srcStride[], int  srcSliceY, int  srcSliceH, uint8_t *const  dstSlice[], const int  dstStride[], int  dstSliceY, int  dstSliceH  )

static

Definition at line 892 of file swscale.c.

Referenced by scale_internal().

ff_sws_slice_worker()

void ff_sws_slice_worker	(	void *	priv,
		int	jobnr,
		int	threadnr,
		int	nb_jobs,
		int	nb_threads
	)

Definition at line 1262 of file swscale.c.

Referenced by context_init_threaded().

Variable Documentation

ff_dither_8x8_128

const uint8_t ff_dither_8x8_128[9][8]

Initial value:

= {
    {  36, 68,  60, 92,  34, 66,  58, 90, },
    { 100,  4, 124, 28,  98,  2, 122, 26, },
    {  52, 84,  44, 76,  50, 82,  42, 74, },
    { 116, 20, 108, 12, 114, 18, 106, 10, },
    {  32, 64,  56, 88,  38, 70,  62, 94, },
    {  96,  0, 120, 24, 102,  6, 126, 30, },
    {  48, 80,  40, 72,  54, 86,  46, 78, },
    { 112, 16, 104,  8, 118, 22, 110, 14, },
    {  36, 68,  60, 92,  34, 66,  58, 90, },
}

Definition at line 38 of file swscale.c.

Referenced by ff_swscale().

sws_pb_64

const uint8_t sws_pb_64[8]

static

Initial value:

= {
    64, 64, 64, 64, 64, 64, 64, 64
}

Definition at line 50 of file swscale.c.

Referenced by ff_swscale().