Libav
Data Structures | Macros | Typedefs | Functions | Variables
swscale_internal.h File Reference
#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/avutil.h"
#include "libavutil/common.h"
#include "libavutil/log.h"
#include "libavutil/pixfmt.h"
#include "libavutil/pixdesc.h"

Go to the source code of this file.

Data Structures

struct  SwsContext
 

Macros

#define STR(s)   AV_TOSTRING(s)
 
#define FAST_BGR2YV12
 
#define MAX_FILTER_SIZE   256
 
#define ALT32_CORR   1
 
#define APCK_PTR2   4
 
#define APCK_COEF   8
 
#define APCK_SIZE   16
 
#define RED_DITHER   "0*8"
 
#define GREEN_DITHER   "1*8"
 
#define BLUE_DITHER   "2*8"
 
#define Y_COEFF   "3*8"
 
#define VR_COEFF   "4*8"
 
#define UB_COEFF   "5*8"
 
#define VG_COEFF   "6*8"
 
#define UG_COEFF   "7*8"
 
#define Y_OFFSET   "8*8"
 
#define U_OFFSET   "9*8"
 
#define V_OFFSET   "10*8"
 
#define LUM_MMX_FILTER_OFFSET   "11*8"
 
#define CHR_MMX_FILTER_OFFSET   "11*8+4*4*256"
 
#define DSTW_OFFSET   "11*8+4*4*256*2"
 
#define ESP_OFFSET   "11*8+4*4*256*2+8"
 
#define VROUNDER_OFFSET   "11*8+4*4*256*2+16"
 
#define U_TEMP   "11*8+4*4*256*2+24"
 
#define V_TEMP   "11*8+4*4*256*2+32"
 
#define Y_TEMP   "11*8+4*4*256*2+40"
 
#define ALP_MMX_FILTER_OFFSET   "11*8+4*4*256*2+48"
 
#define UV_OFF_PX   "11*8+4*4*256*3+48"
 
#define UV_OFF_BYTE   "11*8+4*4*256*3+56"
 
#define DITHER16   "11*8+4*4*256*3+64"
 
#define DITHER32   "11*8+4*4*256*3+80"
 
#define isGray(x)
 
#define isRGBinInt(x)
 
#define isBGRinInt(x)
 
#define isAnyRGB(x)
 

Typedefs

typedef int(* SwsFunc )(struct SwsContext *context, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
 
typedef void(* yuv2planar1_fn )(const int16_t *src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
 Write one line of horizontally scaled data to planar output without any additional vertical scaling (or point-scaling). More...
 
typedef void(* yuv2planarX_fn )(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
 Write one line of horizontally scaled data to planar output with multi-point vertical scaling between input pixels. More...
 
typedef void(* yuv2interleavedX_fn )(struct SwsContext *c, const int16_t *chrFilter, int chrFilterSize, const int16_t **chrUSrc, const int16_t **chrVSrc, uint8_t *dest, int dstW)
 Write one line of horizontally scaled chroma to interleaved output with multi-point vertical scaling between input pixels. More...
 
typedef void(* yuv2packed1_fn )(struct SwsContext *c, const int16_t *lumSrc, const int16_t *chrUSrc[2], const int16_t *chrVSrc[2], const int16_t *alpSrc, uint8_t *dest, int dstW, int uvalpha, int y)
 Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output without any additional vertical scaling (or point-scaling). More...
 
typedef void(* yuv2packed2_fn )(struct SwsContext *c, const int16_t *lumSrc[2], const int16_t *chrUSrc[2], const int16_t *chrVSrc[2], const int16_t *alpSrc[2], uint8_t *dest, int dstW, int yalpha, int uvalpha, int y)
 Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output by doing bilinear scaling between two input lines. More...
 
typedef void(* yuv2packedX_fn )(struct SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize, const int16_t *chrFilter, const int16_t **chrUSrc, const int16_t **chrVSrc, int chrFilterSize, const int16_t **alpSrc, uint8_t *dest, int dstW, int y)
 Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output by doing multi-point vertical scaling between input pixels. More...
 
typedef void(* yuv2anyX_fn )(struct SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize, const int16_t *chrFilter, const int16_t **chrUSrc, const int16_t **chrVSrc, int chrFilterSize, const int16_t **alpSrc, uint8_t **dest, int dstW, int y)
 Write one line of horizontally scaled Y/U/V/A to YUV/RGB output by doing multi-point vertical scaling between input pixels. More...
 

Functions

SwsFunc ff_yuv2rgb_get_func_ptr (SwsContext *c)
 
int ff_yuv2rgb_c_init_tables (SwsContext *c, const int inv_table[4], int fullRange, int brightness, int contrast, int saturation)
 
void ff_yuv2rgb_init_tables_ppc (SwsContext *c, const int inv_table[4], int brightness, int contrast, int saturation)
 
void updateMMXDitherTables (SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex, int lastInLumBuf, int lastInChrBuf)
 
SwsFunc ff_yuv2rgb_init_x86 (SwsContext *c)
 
SwsFunc ff_yuv2rgb_init_vis (SwsContext *c)
 
SwsFunc ff_yuv2rgb_init_ppc (SwsContext *c)
 
SwsFunc ff_yuv2rgb_init_bfin (SwsContext *c)
 
const char * sws_format_name (enum AVPixelFormat format)
 
static av_always_inline int is16BPS (enum AVPixelFormat pix_fmt)
 
static av_always_inline int is9_OR_10BPS (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isBE (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isYUV (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isPlanarYUV (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isRGB (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isALPHA (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isPacked (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isPlanar (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isPackedRGB (enum AVPixelFormat pix_fmt)
 
static av_always_inline int isPlanarRGB (enum AVPixelFormat pix_fmt)
 
static av_always_inline int usePal (enum AVPixelFormat pix_fmt)
 
void ff_get_unscaled_swscale (SwsContext *c)
 Set c->swscale to an unscaled converter if one exists for the specific source and destination formats, bit depths, flags, etc. More...
 
void ff_get_unscaled_swscale_bfin (SwsContext *c)
 
void ff_get_unscaled_swscale_ppc (SwsContext *c)
 
SwsFunc ff_getSwsFunc (SwsContext *c)
 Return function pointer to fastest main scaler path function depending on architecture and available optimizations. More...
 
void ff_sws_init_input_funcs (SwsContext *c)
 
void ff_sws_init_output_funcs (SwsContext *c, yuv2planar1_fn *yuv2plane1, yuv2planarX_fn *yuv2planeX, yuv2interleavedX_fn *yuv2nv12cX, yuv2packed1_fn *yuv2packed1, yuv2packed2_fn *yuv2packed2, yuv2packedX_fn *yuv2packedX, yuv2anyX_fn *yuv2anyX)
 
void ff_sws_init_swscale_ppc (SwsContext *c)
 
void ff_sws_init_swscale_x86 (SwsContext *c)
 

Variables

const uint64_t ff_dither4 [2]
 
const uint64_t ff_dither8 [2]
 
const uint8_t ff_dither_4x4_16 [4][8]
 
const uint8_t ff_dither_8x8_32 [8][8]
 
const uint8_t ff_dither_8x8_73 [8][8]
 
const uint8_t ff_dither_8x8_128 [8][8]
 
const uint8_t ff_dither_8x8_220 [8][8]
 
const int32_t ff_yuv2rgb_coeffs [8][4]
 
const AVClass sws_context_class
 

Macro Definition Documentation

#define STR (   s)    AV_TOSTRING(s)

Definition at line 37 of file swscale_internal.h.

Referenced by av_register_all().

#define FAST_BGR2YV12

Definition at line 39 of file swscale_internal.h.

#define MAX_FILTER_SIZE   256

Definition at line 41 of file swscale_internal.h.

Referenced by initFilter().

#define ALT32_CORR   1

Definition at line 46 of file swscale_internal.h.

Referenced by rgbToRgbWrapper().

#define APCK_PTR2   4

Definition at line 54 of file swscale_internal.h.

#define APCK_COEF   8

Definition at line 55 of file swscale_internal.h.

#define APCK_SIZE   16

Definition at line 56 of file swscale_internal.h.

Referenced by initFilter().

#define RED_DITHER   "0*8"
#define GREEN_DITHER   "1*8"
#define BLUE_DITHER   "2*8"
#define Y_COEFF   "3*8"

Definition at line 375 of file swscale_internal.h.

#define VR_COEFF   "4*8"

Definition at line 376 of file swscale_internal.h.

#define UB_COEFF   "5*8"

Definition at line 377 of file swscale_internal.h.

#define VG_COEFF   "6*8"

Definition at line 378 of file swscale_internal.h.

#define UG_COEFF   "7*8"

Definition at line 379 of file swscale_internal.h.

#define Y_OFFSET   "8*8"

Definition at line 380 of file swscale_internal.h.

#define U_OFFSET   "9*8"

Definition at line 381 of file swscale_internal.h.

#define V_OFFSET   "10*8"

Definition at line 382 of file swscale_internal.h.

#define LUM_MMX_FILTER_OFFSET   "11*8"

Definition at line 383 of file swscale_internal.h.

#define CHR_MMX_FILTER_OFFSET   "11*8+4*4*256"

Definition at line 384 of file swscale_internal.h.

#define DSTW_OFFSET   "11*8+4*4*256*2"

Definition at line 385 of file swscale_internal.h.

#define ESP_OFFSET   "11*8+4*4*256*2+8"
#define VROUNDER_OFFSET   "11*8+4*4*256*2+16"

Definition at line 387 of file swscale_internal.h.

#define U_TEMP   "11*8+4*4*256*2+24"

Definition at line 388 of file swscale_internal.h.

Referenced by yuv2rgb32_2(), and yuv2rgb32_X_ar().

#define V_TEMP   "11*8+4*4*256*2+32"

Definition at line 389 of file swscale_internal.h.

Referenced by yuv2rgb32_2(), and yuv2rgb32_X_ar().

#define Y_TEMP   "11*8+4*4*256*2+40"

Definition at line 390 of file swscale_internal.h.

Referenced by yuv2rgb32_X_ar().

#define ALP_MMX_FILTER_OFFSET   "11*8+4*4*256*2+48"

Definition at line 391 of file swscale_internal.h.

Referenced by yuv2rgb32_X(), and yuv2rgb32_X_ar().

#define UV_OFF_PX   "11*8+4*4*256*3+48"

Definition at line 392 of file swscale_internal.h.

#define UV_OFF_BYTE   "11*8+4*4*256*3+56"

Definition at line 393 of file swscale_internal.h.

#define DITHER16   "11*8+4*4*256*3+64"

Definition at line 394 of file swscale_internal.h.

#define DITHER32   "11*8+4*4*256*3+80"

Definition at line 395 of file swscale_internal.h.

#define isGray (   x)
Value:
((x) == AV_PIX_FMT_GRAY8 || \
(x) == AV_PIX_FMT_Y400A || \
(x) == AV_PIX_FMT_GRAY16BE || \
8bit gray, 8bit alpha
Definition: pixfmt.h:144
Y , 16bpp, big-endian.
Definition: pixfmt.h:100
Y , 8bpp.
Definition: pixfmt.h:73
Y , 16bpp, little-endian.
Definition: pixfmt.h:101

Definition at line 627 of file swscale_internal.h.

#define isRGBinInt (   x)
Value:
((x) == AV_PIX_FMT_RGB48BE || \
(x) == AV_PIX_FMT_RGB48LE || \
(x) == AV_PIX_FMT_RGB32 || \
(x) == AV_PIX_FMT_RGB32_1 || \
(x) == AV_PIX_FMT_RGB24 || \
(x) == AV_PIX_FMT_RGB565BE || \
(x) == AV_PIX_FMT_RGB565LE || \
(x) == AV_PIX_FMT_RGB555BE || \
(x) == AV_PIX_FMT_RGB555LE || \
(x) == AV_PIX_FMT_RGB444BE || \
(x) == AV_PIX_FMT_RGB444LE || \
(x) == AV_PIX_FMT_RGB8 || \
(x) == AV_PIX_FMT_RGB4 || \
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:67
packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), little-endian, most significant bit to 0 ...
Definition: pixfmt.h:118
packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), big-endian, most significant bits to 0 ...
Definition: pixfmt.h:141
packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in ...
Definition: pixfmt.h:90
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:116
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:113
packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), little-endian, most significant bits to 0 ...
Definition: pixfmt.h:140
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
Definition: pixfmt.h:115
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
Definition: pixfmt.h:91
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:206
packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), big-endian, most significant bit to 0 ...
Definition: pixfmt.h:117
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:75
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:74
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:112
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
Definition: pixfmt.h:89
#define AV_PIX_FMT_RGB32_1
Definition: pixfmt.h:207

Definition at line 634 of file swscale_internal.h.

Referenced by findRgbConvFn().

#define isBGRinInt (   x)
Value:
((x) == AV_PIX_FMT_BGR48BE || \
(x) == AV_PIX_FMT_BGR48LE || \
(x) == AV_PIX_FMT_BGR32 || \
(x) == AV_PIX_FMT_BGR32_1 || \
(x) == AV_PIX_FMT_BGR24 || \
(x) == AV_PIX_FMT_BGR565BE || \
(x) == AV_PIX_FMT_BGR565LE || \
(x) == AV_PIX_FMT_BGR555BE || \
(x) == AV_PIX_FMT_BGR555LE || \
(x) == AV_PIX_FMT_BGR444BE || \
(x) == AV_PIX_FMT_BGR444LE || \
(x) == AV_PIX_FMT_BGR8 || \
(x) == AV_PIX_FMT_BGR4 || \
packed RGB 1:2:1 bitstream, 4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in ...
Definition: pixfmt.h:87
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
Definition: pixfmt.h:121
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
Definition: pixfmt.h:88
#define AV_PIX_FMT_BGR32_1
Definition: pixfmt.h:209
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:146
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:68
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:145
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
Definition: pixfmt.h:120
#define AV_PIX_FMT_BGR32
Definition: pixfmt.h:208
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:86
packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), little-endian, most significant bit to 1 ...
Definition: pixfmt.h:123
packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), big-endian, most significant bits to 1 ...
Definition: pixfmt.h:143
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:75
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:74
packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), big-endian, most significant bit to 1 ...
Definition: pixfmt.h:122
packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), little-endian, most significant bits to 1 ...
Definition: pixfmt.h:142

Definition at line 652 of file swscale_internal.h.

Referenced by findRgbConvFn().

#define isAnyRGB (   x)
Value:
(isRGBinInt(x) || \
#define isRGBinInt(x)
#define isBGRinInt(x)

Definition at line 670 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), sws_init_context(), and sws_init_swscale().

Typedef Documentation

typedef int(* SwsFunc)(struct SwsContext *context, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])

Definition at line 61 of file swscale_internal.h.

typedef void(* yuv2planar1_fn)(const int16_t *src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)

Write one line of horizontally scaled data to planar output without any additional vertical scaling (or point-scaling).

Parameters
srcscaled source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
destpointer to the output plane. For >8bit output, this is in uint16_t
dstWwidth of destination in pixels
ditherordered dither array of type int16_t and size 8
offsetDither offset

Definition at line 77 of file swscale_internal.h.

typedef void(* yuv2planarX_fn)(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)

Write one line of horizontally scaled data to planar output with multi-point vertical scaling between input pixels.

Parameters
filtervertical luma/alpha scaling coefficients, 12bit [0,4096]
srcscaled luma (Y) or alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
filterSizenumber of vertical input lines to scale
destpointer to output plane. For >8bit output, this is in uint16_t
dstWwidth of destination pixels
offsetDither offset

Definition at line 93 of file swscale_internal.h.

typedef void(* yuv2interleavedX_fn)(struct SwsContext *c, const int16_t *chrFilter, int chrFilterSize, const int16_t **chrUSrc, const int16_t **chrVSrc, uint8_t *dest, int dstW)

Write one line of horizontally scaled chroma to interleaved output with multi-point vertical scaling between input pixels.

Parameters
cSWS scaling context
chrFiltervertical chroma scaling coefficients, 12bit [0,4096]
chrUSrcscaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrcscaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrFilterSizenumber of vertical chroma input lines to scale
destpointer to the output plane. For >8bit output, this is in uint16_t
dstWwidth of chroma planes

Definition at line 112 of file swscale_internal.h.

typedef void(* yuv2packed1_fn)(struct SwsContext *c, const int16_t *lumSrc, const int16_t *chrUSrc[2], const int16_t *chrVSrc[2], const int16_t *alpSrc, uint8_t *dest, int dstW, int uvalpha, int y)

Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output without any additional vertical scaling (or point-scaling).

Note that this function may do chroma scaling, see the "uvalpha" argument.

Parameters
cSWS scaling context
lumSrcscaled luma (Y) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrUSrcscaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrcscaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
alpSrcscaled alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
destpointer to the output plane. For 16bit output, this is uint16_t
dstWwidth of lumSrc and alpSrc in pixels, number of pixels to write into dest[]
uvalphachroma scaling coefficient for the second line of chroma pixels, either 2048 or 0. If 0, one chroma input is used for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag is set, it generates 1 output pixel). If 2048, two chroma input pixels should be averaged for 2 output pixels (this only happens if SWS_FLAG_FULL_CHR_INT is not set)
yvertical line number for this output. This does not need to be used to calculate the offset in the destination, but can be used to generate comfort noise using dithering for some output formats.

Definition at line 148 of file swscale_internal.h.

typedef void(* yuv2packed2_fn)(struct SwsContext *c, const int16_t *lumSrc[2], const int16_t *chrUSrc[2], const int16_t *chrVSrc[2], const int16_t *alpSrc[2], uint8_t *dest, int dstW, int yalpha, int uvalpha, int y)

Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output by doing bilinear scaling between two input lines.

Parameters
cSWS scaling context
lumSrcscaled luma (Y) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrUSrcscaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrcscaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
alpSrcscaled alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
destpointer to the output plane. For 16bit output, this is uint16_t
dstWwidth of lumSrc and alpSrc in pixels, number of pixels to write into dest[]
yalphaluma/alpha scaling coefficients for the second input line. The first line's coefficients can be calculated by using 4096 - yalpha
uvalphachroma scaling coefficient for the second input line. The first line's coefficients can be calculated by using 4096 - uvalpha
yvertical line number for this output. This does not need to be used to calculate the offset in the destination, but can be used to generate comfort noise using dithering for some output formats.

Definition at line 181 of file swscale_internal.h.

typedef void(* yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize, const int16_t *chrFilter, const int16_t **chrUSrc, const int16_t **chrVSrc, int chrFilterSize, const int16_t **alpSrc, uint8_t *dest, int dstW, int y)

Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB output by doing multi-point vertical scaling between input pixels.

Parameters
cSWS scaling context
lumFiltervertical luma/alpha scaling coefficients, 12bit [0,4096]
lumSrcscaled luma (Y) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
lumFilterSizenumber of vertical luma/alpha input lines to scale
chrFiltervertical chroma scaling coefficients, 12bit [0,4096]
chrUSrcscaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrcscaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrFilterSizenumber of vertical chroma input lines to scale
alpSrcscaled alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
destpointer to the output plane. For 16bit output, this is uint16_t
dstWwidth of lumSrc and alpSrc in pixels, number of pixels to write into dest[]
yvertical line number for this output. This does not need to be used to calculate the offset in the destination, but can be used to generate comfort noise using dithering or some output formats.

Definition at line 213 of file swscale_internal.h.

typedef void(* yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize, const int16_t *chrFilter, const int16_t **chrUSrc, const int16_t **chrVSrc, int chrFilterSize, const int16_t **alpSrc, uint8_t **dest, int dstW, int y)

Write one line of horizontally scaled Y/U/V/A to YUV/RGB output by doing multi-point vertical scaling between input pixels.

Parameters
cSWS scaling context
lumFiltervertical luma/alpha scaling coefficients, 12bit [0,4096]
lumSrcscaled luma (Y) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
lumFilterSizenumber of vertical luma/alpha input lines to scale
chrFiltervertical chroma scaling coefficients, 12bit [0,4096]
chrUSrcscaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrcscaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrFilterSizenumber of vertical chroma input lines to scale
alpSrcscaled alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
destpointer to the output planes. For 16bit output, this is uint16_t
dstWwidth of lumSrc and alpSrc in pixels, number of pixels to write into dest[]
yvertical line number for this output. This does not need to be used to calculate the offset in the destination, but can be used to generate comfort noise using dithering or some output formats.

Definition at line 247 of file swscale_internal.h.

Function Documentation

SwsFunc ff_yuv2rgb_get_func_ptr ( SwsContext c)

Definition at line 559 of file yuv2rgb.c.

Referenced by ff_get_unscaled_swscale().

int ff_yuv2rgb_c_init_tables ( SwsContext c,
const int  inv_table[4],
int  fullRange,
int  brightness,
int  contrast,
int  saturation 
)

Definition at line 664 of file yuv2rgb.c.

Referenced by sws_setColorspaceDetails().

void ff_yuv2rgb_init_tables_ppc ( SwsContext c,
const int  inv_table[4],
int  brightness,
int  contrast,
int  saturation 
)

Definition at line 604 of file yuv2rgb_altivec.c.

Referenced by sws_setColorspaceDetails().

void updateMMXDitherTables ( SwsContext c,
int  dstY,
int  lumBufIndex,
int  chrBufIndex,
int  lastInLumBuf,
int  lastInChrBuf 
)

Referenced by swscale().

SwsFunc ff_yuv2rgb_init_x86 ( SwsContext c)

Definition at line 73 of file yuv2rgb.c.

Referenced by ff_yuv2rgb_get_func_ptr().

SwsFunc ff_yuv2rgb_init_vis ( SwsContext c)

Definition at line 188 of file yuv2rgb_vis.c.

Referenced by ff_yuv2rgb_get_func_ptr().

SwsFunc ff_yuv2rgb_init_ppc ( SwsContext c)

Definition at line 541 of file yuv2rgb_altivec.c.

Referenced by ff_yuv2rgb_get_func_ptr().

SwsFunc ff_yuv2rgb_init_bfin ( SwsContext c)

Definition at line 171 of file yuv2rgb_bfin.c.

Referenced by ff_yuv2rgb_get_func_ptr().

const char* sws_format_name ( enum AVPixelFormat  format)
static av_always_inline int is16BPS ( enum AVPixelFormat  pix_fmt)
static
static av_always_inline int is9_OR_10BPS ( enum AVPixelFormat  pix_fmt)
static
static av_always_inline int isBE ( enum AVPixelFormat  pix_fmt)
static
static av_always_inline int isYUV ( enum AVPixelFormat  pix_fmt)
static
static av_always_inline int isPlanarYUV ( enum AVPixelFormat  pix_fmt)
static

Definition at line 608 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), and swscale().

static av_always_inline int isRGB ( enum AVPixelFormat  pix_fmt)
static

Definition at line 615 of file swscale_internal.h.

static av_always_inline int isALPHA ( enum AVPixelFormat  pix_fmt)
static

Definition at line 674 of file swscale_internal.h.

static av_always_inline int isPacked ( enum AVPixelFormat  pix_fmt)
static

Definition at line 681 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), and swscale().

static av_always_inline int isPlanar ( enum AVPixelFormat  pix_fmt)
static
static av_always_inline int isPackedRGB ( enum AVPixelFormat  pix_fmt)
static

Definition at line 696 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale().

static av_always_inline int isPlanarRGB ( enum AVPixelFormat  pix_fmt)
static

Definition at line 703 of file swscale_internal.h.

Referenced by sws_init_context().

static av_always_inline int usePal ( enum AVPixelFormat  pix_fmt)
static

Definition at line 711 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), palToRgbWrapper(), reset_ptr(), and sws_scale().

void ff_get_unscaled_swscale ( SwsContext c)

Set c->swscale to an unscaled converter if one exists for the specific source and destination formats, bit depths, flags, etc.

Definition at line 988 of file swscale_unscaled.c.

Referenced by sws_init_context().

void ff_get_unscaled_swscale_bfin ( SwsContext c)

Definition at line 75 of file swscale_bfin.c.

Referenced by ff_get_unscaled_swscale().

void ff_get_unscaled_swscale_ppc ( SwsContext c)

Definition at line 187 of file yuv2yuv_altivec.c.

Referenced by ff_get_unscaled_swscale().

SwsFunc ff_getSwsFunc ( SwsContext c)

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

Definition at line 771 of file swscale.c.

Referenced by sws_init_context().

void ff_sws_init_input_funcs ( SwsContext c)

Definition at line 671 of file input.c.

Referenced by sws_init_swscale().

void ff_sws_init_output_funcs ( SwsContext c,
yuv2planar1_fn yuv2plane1,
yuv2planarX_fn yuv2planeX,
yuv2interleavedX_fn yuv2nv12cX,
yuv2packed1_fn yuv2packed1,
yuv2packed2_fn yuv2packed2,
yuv2packedX_fn yuv2packedX,
yuv2anyX_fn yuv2anyX 
)

Definition at line 1341 of file output.c.

Referenced by sws_init_swscale(), and swscale().

void ff_sws_init_swscale_ppc ( SwsContext c)

Definition at line 290 of file swscale_altivec.c.

Referenced by ff_getSwsFunc().

void ff_sws_init_swscale_x86 ( SwsContext c)

Definition at line 305 of file swscale.c.

Referenced by ff_getSwsFunc().

Variable Documentation

const uint64_t ff_dither4[2]

Referenced by yuv420_rgb16().

const uint64_t ff_dither8[2]

Referenced by yuv420_rgb15(), and yuv420_rgb16().

const uint8_t ff_dither_4x4_16[4][8]

Definition at line 49 of file output.c.

Referenced by yuv2rgb_write().

const uint8_t ff_dither_8x8_32[8][8]

Definition at line 56 of file output.c.

Referenced by yuv2rgb_write().

const uint8_t ff_dither_8x8_73[8][8]

Definition at line 67 of file output.c.

Referenced by yuv2rgb_write().

const uint8_t ff_dither_8x8_128[8][8]

Definition at line 38 of file swscale.c.

Referenced by swscale().

const uint8_t ff_dither_8x8_220[8][8]
const int32_t ff_yuv2rgb_coeffs[8][4]

Definition at line 38 of file yuv2rgb.c.

Referenced by sws_getCachedContext(), sws_getCoefficients(), and sws_getContext().

const AVClass sws_context_class

Definition at line 69 of file options.c.

Referenced by sws_alloc_context(), and sws_get_class().