libswscale/swscale_internal.h File Reference

#include "config.h"
#include "libavutil/avutil.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

Defines

#define STR(s)   AV_TOSTRING(s)
#define YUVRGB_TABLE_HEADROOM   128
#define FAST_BGR2YV12
#define MAX_FILTER_SIZE   256
#define DITHER1XBPP
#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 is16BPS(x)   (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 15)
#define is9_OR_10BPS(x)
#define isNBPS(x)   is9_OR_10BPS(x)
#define isBE(x)   (av_pix_fmt_descriptors[x].flags & PIX_FMT_BE)
#define isYUV(x)
#define isPlanarYUV(x)
#define isRGB(x)   (av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB)
#define isGray(x)
#define isRGBinInt(x)
#define isBGRinInt(x)
#define isRGBinBytes(x)
#define isBGRinBytes(x)
#define isAnyRGB(x)
#define isALPHA(x)
#define isPacked(x)
#define isPlanar(x)
#define isPackedRGB(x)
#define isPlanarRGB(x)
#define usePal(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).
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.
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.
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).
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.
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.

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_altivec (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_mmx (SwsContext *c)
SwsFunc ff_yuv2rgb_init_vis (SwsContext *c)
SwsFunc ff_yuv2rgb_init_altivec (SwsContext *c)
SwsFunc ff_yuv2rgb_get_func_ptr_bfin (SwsContext *c)
void ff_bfin_get_unscaled_swscale (SwsContext *c)
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.
void ff_swscale_get_unscaled_altivec (SwsContext *c)
SwsFunc ff_getSwsFunc (SwsContext *c)
 Return function pointer to fastest main scaler path function depending on architecture and available optimizations.
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)
void ff_sws_init_swScale_altivec (SwsContext *c)
void ff_sws_init_swScale_mmx (SwsContext *c)

Variables

const uint64_t ff_dither4 [2]
const uint64_t ff_dither8 [2]
const uint8_t dithers [8][8][8]
const uint16_t dither_scale [15][16]
const AVClass sws_context_class

Define Documentation

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

Definition at line 361 of file swscale_internal.h.

Referenced by yuv2rgb32_X_ar_TMPL(), and yuv2rgb32_X_TMPL().

#define ALT32_CORR   1

Definition at line 48 of file swscale_internal.h.

Referenced by rgbToRgbWrapper().

#define APCK_COEF   8

Definition at line 57 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST().

#define APCK_PTR2   4

Definition at line 56 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST().

#define APCK_SIZE   16

Definition at line 58 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), and initFilter().

#define BLUE_DITHER   "2*8"

Definition at line 344 of file swscale_internal.h.

Referenced by yuv2rgb555_1_TMPL(), yuv2rgb555_2_TMPL(), yuv2rgb555_X_ar_TMPL(), yuv2rgb555_X_TMPL(), yuv2rgb565_1_TMPL(), yuv2rgb565_2_TMPL(), yuv2rgb565_X_ar_TMPL(), and yuv2rgb565_X_TMPL().

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

Definition at line 354 of file swscale_internal.h.

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

Definition at line 364 of file swscale_internal.h.

#define DITHER1XBPP

Definition at line 43 of file swscale_internal.h.

Referenced by sws_init_context().

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

Definition at line 365 of file swscale_internal.h.

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

Definition at line 355 of file swscale_internal.h.

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

Definition at line 356 of file swscale_internal.h.

Referenced by yuv2bgr24_1_TMPL(), yuv2bgr24_2_TMPL(), yuv2rgb32_1_TMPL(), yuv2rgb32_2_TMPL(), yuv2rgb555_1_TMPL(), yuv2rgb555_2_TMPL(), yuv2rgb565_1_TMPL(), yuv2rgb565_2_TMPL(), yuv2yuyv422_1_TMPL(), and yuv2yuyv422_2_TMPL().

#define FAST_BGR2YV12

Definition at line 39 of file swscale_internal.h.

#define GREEN_DITHER   "1*8"

Definition at line 343 of file swscale_internal.h.

Referenced by yuv2rgb555_1_TMPL(), yuv2rgb555_2_TMPL(), yuv2rgb555_X_ar_TMPL(), yuv2rgb555_X_TMPL(), yuv2rgb565_1_TMPL(), yuv2rgb565_2_TMPL(), yuv2rgb565_X_ar_TMPL(), and yuv2rgb565_X_TMPL().

#define is16BPS ( x   )     (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 15)

Definition at line 557 of file swscale_internal.h.

Referenced by ff_sws_init_output_funcs(), ff_sws_init_swScale_altivec(), planarCopyWrapper(), sws_init_context(), and swScale().

#define is9_OR_10BPS ( x   ) 

Value:

(av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 8 || \
     av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 9)

Definition at line 560 of file swscale_internal.h.

Referenced by ff_sws_init_output_funcs(), ff_sws_init_swScale_altivec(), and swScale().

#define isALPHA ( x   ) 

Value:

(av_pix_fmt_descriptors[x].nb_components == 2          ||  \
     av_pix_fmt_descriptors[x].nb_components == 4)

Definition at line 660 of file swscale_internal.h.

#define isAnyRGB ( x   ) 

Value:

(           \
          isRGBinInt(x)       ||    \
          isBGRinInt(x)       ||    \
          (x)==PIX_FMT_GBR24P     \
    )

Definition at line 653 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), hScale16To15_c(), hScale16To19_c(), sws_init_context(), and sws_init_swScale_c().

#define isBE ( x   )     (av_pix_fmt_descriptors[x].flags & PIX_FMT_BE)

Definition at line 566 of file swscale_internal.h.

Referenced by ff_sws_init_output_funcs(), ff_sws_init_swScale_mmx(), and planarCopyWrapper().

#define isBGRinBytes ( x   ) 

Value:

(           \
           (x)==PIX_FMT_BGR48BE     \
        || (x)==PIX_FMT_BGR48LE     \
        || (x)==PIX_FMT_BGRA64BE    \
        || (x)==PIX_FMT_BGRA64LE    \
        || (x)==PIX_FMT_BGRA        \
        || (x)==PIX_FMT_ABGR        \
        || (x)==PIX_FMT_BGR24       \
    )

Definition at line 643 of file swscale_internal.h.

#define isBGRinInt ( x   ) 

Value:

(           \
         (x)==PIX_FMT_BGR48BE  ||   \
         (x)==PIX_FMT_BGR48LE  ||   \
         (x)==PIX_FMT_BGRA64BE ||   \
         (x)==PIX_FMT_BGRA64LE ||   \
         (x)==PIX_FMT_BGR32    ||   \
         (x)==PIX_FMT_BGR32_1  ||   \
         (x)==PIX_FMT_BGR24    ||   \
         (x)==PIX_FMT_BGR565BE ||   \
         (x)==PIX_FMT_BGR565LE ||   \
         (x)==PIX_FMT_BGR555BE ||   \
         (x)==PIX_FMT_BGR555LE ||   \
         (x)==PIX_FMT_BGR444BE ||   \
         (x)==PIX_FMT_BGR444LE ||   \
         (x)==PIX_FMT_BGR8     ||   \
         (x)==PIX_FMT_BGR4     ||   \
         (x)==PIX_FMT_BGR4_BYTE||   \
         (x)==PIX_FMT_MONOBLACK||   \
         (x)==PIX_FMT_MONOWHITE   \
    )

Definition at line 612 of file swscale_internal.h.

Referenced by findRgbConvFn().

#define isGray ( x   ) 

Value:

((x) == PIX_FMT_GRAY8       ||     \
     (x) == PIX_FMT_Y400A       ||     \
     (x) == PIX_FMT_GRAY16BE    ||     \
     (x) == PIX_FMT_GRAY16LE)

Definition at line 584 of file swscale_internal.h.

#define isNBPS ( x   )     is9_OR_10BPS(x)

Definition at line 564 of file swscale_internal.h.

Referenced by planarCopyWrapper(), and sws_init_context().

#define isPacked ( x   ) 

Value:

(       \
           (x)==PIX_FMT_PAL8        \
        || (x)==PIX_FMT_YUYV422     \
        || (x)==PIX_FMT_UYVY422     \
        || (x)==PIX_FMT_Y400A       \
        ||  isRGBinInt(x)           \
        ||  isBGRinInt(x)           \
    )

Definition at line 665 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), and swScale().

#define isPackedRGB ( x   ) 

Value:

((av_pix_fmt_descriptors[x].flags                        & \
     (PIX_FMT_PLANAR | PIX_FMT_RGB)) == PIX_FMT_RGB)

Definition at line 684 of file swscale_internal.h.

#define isPlanar ( x   ) 

Value:

(av_pix_fmt_descriptors[x].nb_components >= 2          &&  \
     (av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR))

Definition at line 680 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), reset_ptr(), and swScale().

#define isPlanarRGB ( x   ) 

Value:

((av_pix_fmt_descriptors[x].flags                        & \
     (PIX_FMT_PLANAR | PIX_FMT_RGB)) == (PIX_FMT_PLANAR | PIX_FMT_RGB))

Definition at line 688 of file swscale_internal.h.

#define isPlanarYUV ( x   ) 

Value:

((av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR) && \
     isYUV(x))

Definition at line 573 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), and swScale().

#define isRGB ( x   )     (av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB)

Definition at line 577 of file swscale_internal.h.

#define isRGBinBytes ( x   ) 

Value:

(           \
           (x)==PIX_FMT_RGB48BE     \
        || (x)==PIX_FMT_RGB48LE     \
        || (x)==PIX_FMT_RGBA64BE    \
        || (x)==PIX_FMT_RGBA64LE    \
        || (x)==PIX_FMT_RGBA        \
        || (x)==PIX_FMT_ARGB        \
        || (x)==PIX_FMT_RGB24       \
    )

Definition at line 634 of file swscale_internal.h.

#define isRGBinInt ( x   ) 

Value:

(           \
        (x)==PIX_FMT_RGB48BE   ||   \
        (x)==PIX_FMT_RGB48LE   ||   \
        (x)==PIX_FMT_RGBA64BE  ||   \
        (x)==PIX_FMT_RGBA64LE  ||   \
        (x)==PIX_FMT_RGB32     ||   \
        (x)==PIX_FMT_RGB32_1   ||   \
        (x)==PIX_FMT_RGB24     ||   \
        (x)==PIX_FMT_RGB565BE  ||   \
        (x)==PIX_FMT_RGB565LE  ||   \
        (x)==PIX_FMT_RGB555BE  ||   \
        (x)==PIX_FMT_RGB555LE  ||   \
        (x)==PIX_FMT_RGB444BE  ||   \
        (x)==PIX_FMT_RGB444LE  ||   \
        (x)==PIX_FMT_RGB8      ||   \
        (x)==PIX_FMT_RGB4      ||   \
        (x)==PIX_FMT_RGB4_BYTE ||   \
        (x)==PIX_FMT_MONOBLACK ||   \
        (x)==PIX_FMT_MONOWHITE   \
    )

Definition at line 591 of file swscale_internal.h.

Referenced by findRgbConvFn().

#define isYUV ( x   ) 

Value:

(!(av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB) && \
     av_pix_fmt_descriptors[x].nb_components >= 2)

Definition at line 569 of file swscale_internal.h.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

#define LUM_MMX_FILTER_OFFSET   "11*8"

Definition at line 353 of file swscale_internal.h.

#define MAX_FILTER_SIZE   256

Definition at line 41 of file swscale_internal.h.

Referenced by initFilter().

#define RED_DITHER   "0*8"

Definition at line 342 of file swscale_internal.h.

Referenced by yuv2rgb555_1_TMPL(), yuv2rgb555_2_TMPL(), yuv2rgb555_X_ar_TMPL(), yuv2rgb555_X_TMPL(), yuv2rgb565_1_TMPL(), yuv2rgb565_2_TMPL(), yuv2rgb565_X_ar_TMPL(), and yuv2rgb565_X_TMPL().

#define STR ( s   )     AV_TOSTRING(s)

Definition at line 35 of file swscale_internal.h.

Referenced by av_register_all().

#define U_OFFSET   "9*8"

Definition at line 351 of file swscale_internal.h.

#define U_TEMP   "11*8+4*4*256*2+24"

Definition at line 358 of file swscale_internal.h.

Referenced by yuv2rgb32_2_TMPL(), and yuv2rgb32_X_ar_TMPL().

#define UB_COEFF   "5*8"

Definition at line 347 of file swscale_internal.h.

#define UG_COEFF   "7*8"

Definition at line 349 of file swscale_internal.h.

#define usePal ( x   ) 

Value:

((av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL)       || \
                   (av_pix_fmt_descriptors[x].flags & PIX_FMT_PSEUDOPAL) || \
                   (x) == PIX_FMT_Y400A)

Definition at line 692 of file swscale_internal.h.

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

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

Definition at line 363 of file swscale_internal.h.

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

Definition at line 362 of file swscale_internal.h.

#define V_OFFSET   "10*8"

Definition at line 352 of file swscale_internal.h.

#define V_TEMP   "11*8+4*4*256*2+32"

Definition at line 359 of file swscale_internal.h.

Referenced by yuv2rgb32_2_TMPL(), and yuv2rgb32_X_ar_TMPL().

#define VG_COEFF   "6*8"

Definition at line 348 of file swscale_internal.h.

#define VR_COEFF   "4*8"

Definition at line 346 of file swscale_internal.h.

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

Definition at line 357 of file swscale_internal.h.

#define Y_COEFF   "3*8"

Definition at line 345 of file swscale_internal.h.

#define Y_OFFSET   "8*8"

Definition at line 350 of file swscale_internal.h.

#define Y_TEMP   "11*8+4*4*256*2+40"

Definition at line 360 of file swscale_internal.h.

Referenced by yuv2rgb32_X_ar_TMPL().

#define YUVRGB_TABLE_HEADROOM   128

Definition at line 37 of file swscale_internal.h.

Referenced by yuv2rgb_1_c_template(), yuv2rgb_2_c_template(), and yuv2rgb_X_c_template().

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 63 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:
c SWS scaling context
chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrFilterSize number of vertical chroma input lines to scale
dest pointer to the output plane. For >8bit output, this is in uint16_t
dstW width of chroma planes

Definition at line 114 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:
c SWS scaling context
lumSrc scaled luma (Y) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
alpSrc scaled alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
dest pointer to the output plane. For 16bit output, this is uint16_t
dstW width of lumSrc and alpSrc in pixels, number of pixels to write into dest[]
uvalpha chroma 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)
y vertical 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 150 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:
c SWS scaling context
lumSrc scaled luma (Y) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
alpSrc scaled alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
dest pointer to the output plane. For 16bit output, this is uint16_t
dstW width of lumSrc and alpSrc in pixels, number of pixels to write into dest[]
yalpha luma/alpha scaling coefficients for the second input line. The first line's coefficients can be calculated by using 4096 - yalpha
uvalpha chroma scaling coefficient for the second input line. The first line's coefficients can be calculated by using 4096 - uvalpha
y vertical 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 183 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:
c SWS scaling context
lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
lumSrc scaled luma (Y) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
lumFilterSize number of vertical luma/alpha input lines to scale
chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
chrFilterSize number of vertical chroma input lines to scale
alpSrc scaled alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
dest pointer to the output plane. For 16bit output, this is uint16_t
dstW width of lumSrc and alpSrc in pixels, number of pixels to write into dest[]
y vertical 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 215 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:
src scaled source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
dest pointer to the output plane. For >8bit output, this is in uint16_t
dstW width of destination in pixels
dither ordered dither array of type int16_t and size 8
offset Dither offset

Definition at line 79 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:
filter vertical luma/alpha scaling coefficients, 12bit [0,4096]
src scaled luma (Y) or alpha (A) source data, 15bit for 8-10bit output, 19-bit for 16bit output (in int32_t)
filterSize number of vertical input lines to scale
dest pointer to output plane. For >8bit output, this is in uint16_t
dstW width of destination pixels
offset Dither offset

Definition at line 95 of file swscale_internal.h.

Function Documentation

void ff_bfin_get_unscaled_swscale ( SwsContext *  c  ) 

Definition at line 81 of file swscale_bfin.c.

Referenced by ff_get_unscaled_swscale().

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 866 of file swscale_unscaled.c.

Referenced by sws_init_context().

SwsFunc ff_getSwsFunc ( SwsContext *  c  ) 

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

Definition at line 733 of file swscale.c.

Referenced by sws_init_context().

void ff_sws_init_input_funcs ( SwsContext *  c  ) 

Definition at line 755 of file input.c.

Referenced by sws_init_swScale_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 
)

Definition at line 1254 of file output.c.

Referenced by sws_init_swScale_c(), and swScale().

void ff_sws_init_swScale_altivec ( SwsContext *  c  ) 

Definition at line 313 of file swscale_altivec.c.

Referenced by ff_getSwsFunc().

void ff_sws_init_swScale_mmx ( SwsContext *  c  ) 

Definition at line 363 of file swscale_mmx.c.

Referenced by ff_getSwsFunc().

void ff_swscale_get_unscaled_altivec ( SwsContext *  c  ) 

Definition at line 182 of file yuv2yuv_altivec.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 633 of file yuv2rgb.c.

Referenced by sws_setColorspaceDetails().

SwsFunc ff_yuv2rgb_get_func_ptr ( SwsContext *  c  ) 

Definition at line 533 of file yuv2rgb.c.

Referenced by ff_get_unscaled_swscale().

SwsFunc ff_yuv2rgb_get_func_ptr_bfin ( SwsContext *  c  ) 

Definition at line 174 of file yuv2rgb_bfin.c.

Referenced by ff_yuv2rgb_get_func_ptr().

SwsFunc ff_yuv2rgb_init_altivec ( SwsContext *  c  ) 

Definition at line 539 of file yuv2rgb_altivec.c.

Referenced by ff_yuv2rgb_get_func_ptr().

SwsFunc ff_yuv2rgb_init_mmx ( SwsContext *  c  ) 

Referenced by ff_yuv2rgb_get_func_ptr().

void ff_yuv2rgb_init_tables_altivec ( SwsContext *  c,
const int  inv_table[4],
int  brightness,
int  contrast,
int  saturation 
)

Definition at line 599 of file yuv2rgb_altivec.c.

Referenced by sws_setColorspaceDetails().

SwsFunc ff_yuv2rgb_init_vis ( SwsContext *  c  ) 

Definition at line 187 of file yuv2rgb_vis.c.

Referenced by ff_yuv2rgb_get_func_ptr().

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

Referenced by swScale().

Variable Documentation

const uint16_t dither_scale[15][16]

Definition at line 125 of file swscale_unscaled.c.

const uint8_t dithers[8][8][8]

Definition at line 48 of file swscale_unscaled.c.

const uint64_t ff_dither4[2]

Referenced by DECLARE_ASM_CONST(), and yuv420_rgb16_TMPL().

const uint64_t ff_dither8[2]

Definition at line 41 of file swscale_mmx.c.

Referenced by DECLARE_ASM_CONST(), yuv420_rgb15_TMPL(), and yuv420_rgb16_TMPL().

const AVClass sws_context_class

Definition at line 69 of file options.c.

Referenced by sws_alloc_context().

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