FFmpeg
Macros | Functions | Variables
swscale.c File Reference
#include <inttypes.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/avutil.h"
#include "libavutil/bswap.h"
#include "libavutil/cpu.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "config.h"
#include "rgb2rgb.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 (SwsContext *c, int16_t *_dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize)
 
static void hScale16To15_c (SwsContext *c, int16_t *dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize)
 
static void hScale8To15_c (SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
 
static void hScale8To19_c (SwsContext *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)
 
static int swscale (SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
 
av_cold void ff_sws_init_range_convert (SwsContext *c)
 
static av_cold void sws_init_swscale (SwsContext *c)
 
SwsFunc ff_getSwsFunc (SwsContext *c)
 Return function pointer to fastest main scaler path function depending on architecture and available optimizations. More...
 
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])
 
static void xyz12Torgb48 (struct SwsContext *c, uint16_t *dst, const uint16_t *src, int stride, int h)
 
static void rgb48Toxyz12 (struct SwsContext *c, uint16_t *dst, const uint16_t *src, int stride, int h)
 
int attribute_align_arg sws_scale (struct SwsContext *c, 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...
 

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 232 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 233 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 55 of file swscale.c.

Referenced by swscale().

◆ hScale16To19_c()

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

Definition at line 66 of file swscale.c.

Referenced by sws_init_swscale().

◆ hScale16To15_c()

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

Definition at line 96 of file swscale.c.

Referenced by sws_init_swscale().

◆ hScale8To15_c()

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

Definition at line 125 of file swscale.c.

Referenced by sws_init_swscale().

◆ hScale8To19_c()

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

Definition at line 141 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 160 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 169 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 178 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 185 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 192 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 203 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 214 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 223 of file swscale.c.

Referenced by ff_sws_init_range_convert().

◆ swscale()

static int swscale ( SwsContext *  c,
const uint8_t *  src[],
int  srcStride[],
int  srcSliceY,
int  srcSliceH,
uint8_t *  dst[],
int  dstStride[] 
)
static

Definition at line 237 of file swscale.c.

Referenced by ff_getSwsFunc(), ffprobe_show_library_versions(), and print_all_libs_info().

◆ ff_sws_init_range_convert()

av_cold void ff_sws_init_range_convert ( SwsContext *  c)

Definition at line 540 of file swscale.c.

Referenced by sws_init_swscale(), and sws_setColorspaceDetails().

◆ sws_init_swscale()

static av_cold void sws_init_swscale ( SwsContext *  c)
static

Definition at line 565 of file swscale.c.

Referenced by ff_getSwsFunc().

◆ ff_getSwsFunc()

SwsFunc ff_getSwsFunc ( SwsContext *  c)

Return function pointer to fastest main scaler path function depending on architecture and available optimizations.

Definition at line 598 of file swscale.c.

Referenced by sws_init_context().

◆ reset_ptr()

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

Definition at line 614 of file swscale.c.

Referenced by sws_scale().

◆ 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 626 of file swscale.c.

Referenced by sws_scale().

◆ xyz12Torgb48()

static void xyz12Torgb48 ( struct SwsContext *  c,
uint16_t *  dst,
const uint16_t *  src,
int  stride,
int  h 
)
static

Definition at line 643 of file swscale.c.

Referenced by sws_scale().

◆ rgb48Toxyz12()

static void rgb48Toxyz12 ( struct SwsContext *  c,
uint16_t *  dst,
const uint16_t *  src,
int  stride,
int  h 
)
static

Definition at line 699 of file swscale.c.

Referenced by sws_scale().

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 39 of file swscale.c.

Referenced by 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 51 of file swscale.c.

Referenced by swscale().

AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
DEBUG_SWSCALE_BUFFERS
#define DEBUG_SWSCALE_BUFFERS
Definition: swscale.c:232
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