SwsContext Struct Reference

#include <swscale_internal.h>

Data Fields

const AVClass * av_class

info on struct for av_log

SwsFunc swScale

Note that src, dst, srcStride, dstStride will be copied in the sws_scale() wrapper so they can be freely modified here.

int srcW

Width of source luma/alpha planes.

int srcH

Height of source luma/alpha planes.

int dstH

Height of destination luma/alpha planes.

int chrSrcW

Width of source chroma planes.

int chrSrcH

Height of source chroma planes.

int chrDstW

Width of destination chroma planes.

int chrDstH

Height of destination chroma planes.

int lumXInc

int chrXInc

int lumYInc

int chrYInc

enum PixelFormat dstFormat

Destination pixel format.

enum PixelFormat srcFormat

Source pixel format.

int dstFormatBpp

Number of bits per pixel of the destination pixel format.

int srcFormatBpp

Number of bits per pixel of the source pixel format.

int dstBpc

int srcBpc

int chrSrcHSubSample

Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.

int chrSrcVSubSample

Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.

int chrDstHSubSample

Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.

int chrDstVSubSample

Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.

int vChrDrop

Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.

int sliceDir

Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).

double param [2]

Input parameters for scaling algorithms that need them.

uint32_t pal_yuv [256]

uint32_t pal_rgb [256]

uint8_t * formatConvBuffer

int lumMmx2FilterCodeSize

Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.

int chrMmx2FilterCodeSize

Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma planes.

uint8_t * lumMmx2FilterCode

Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.

uint8_t * chrMmx2FilterCode

Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma planes.

int canMMX2BeUsed

int dstY

Last destination vertical line output from last slice.

int flags

Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...

void * yuvTable

uint8_t * table_rV [256+2 *YUVRGB_TABLE_HEADROOM]

uint8_t * table_gU [256+2 *YUVRGB_TABLE_HEADROOM]

int table_gV [256+2 *YUVRGB_TABLE_HEADROOM]

uint8_t * table_bU [256+2 *YUVRGB_TABLE_HEADROOM]

int contrast

int brightness

int saturation

int srcColorspaceTable [4]

int dstColorspaceTable [4]

int srcRange

0 = MPG YUV range, 1 = JPG YUV range (source image).

int dstRange

0 = MPG YUV range, 1 = JPG YUV range (destination image).

int src0Alpha

int dst0Alpha

int yuv2rgb_y_offset

int yuv2rgb_y_coeff

int yuv2rgb_v2r_coeff

int yuv2rgb_v2g_coeff

int yuv2rgb_u2g_coeff

int yuv2rgb_u2b_coeff

uint64_t redDither

uint64_t greenDither

uint64_t blueDither

uint64_t yCoeff

uint64_t vrCoeff

uint64_t ubCoeff

uint64_t vgCoeff

uint64_t ugCoeff

uint64_t yOffset

uint64_t uOffset

uint64_t vOffset

int32_t lumMmxFilter [4 *MAX_FILTER_SIZE]

int32_t chrMmxFilter [4 *MAX_FILTER_SIZE]

int dstW

Width of destination luma/alpha planes.

uint64_t esp

uint64_t vRounder

uint64_t u_temp

uint64_t v_temp

uint64_t y_temp

int32_t alpMmxFilter [4 *MAX_FILTER_SIZE]

ptrdiff_t uv_off

offset (in pixels) between u and v planes

ptrdiff_t uv_offx2

offset (in bytes) between u and v planes

uint16_t dither16 [8]

uint32_t dither32 [8]

const uint8_t * chrDither8

const uint8_t * lumDither8

int use_mmx_vfilter

yuv2planar1_fn yuv2plane1

yuv2planarX_fn yuv2planeX

yuv2interleavedX_fn yuv2nv12cX

yuv2packed1_fn yuv2packed1

yuv2packed2_fn yuv2packed2

yuv2packedX_fn yuv2packedX

void(* lumToYV12 )(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal)

Unscaled conversion of luma plane to YV12 for horizontal scaler.

void(* alpToYV12 )(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal)

Unscaled conversion of alpha plane to YV12 for horizontal scaler.

void(* chrToYV12 )(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal)

Unscaled conversion of chroma planes to YV12 for horizontal scaler.

void(* lumConvertRange )(int16_t *dst, int width)

Color range conversion function for luma plane if needed.

void(* chrConvertRange )(int16_t *dst1, int16_t *dst2, int width)

Color range conversion function for chroma planes if needed.

int needs_hcscale

Set if there are chroma planes to be converted.

Scaled horizontal lines ring buffer.

The horizontal scaler keeps just enough scaled lines in a ring buffer so they may be passed to the vertical scaler.
The pointers to the allocated buffers for each line are duplicated in sequence in the ring buffer to simplify indexing and avoid wrapping around between lines inside the vertical scaler code. The wrapping is done before the vertical scaler is called.

int16_t ** lumPixBuf

Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.

int16_t ** chrUPixBuf

Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.

int16_t ** chrVPixBuf

Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.

int16_t ** alpPixBuf

Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.

int vLumBufSize

Number of vertical luma/alpha lines allocated in the ring buffer.

int vChrBufSize

Number of vertical chroma lines allocated in the ring buffer.

int lastInLumBuf

Last scaled horizontal luma/alpha line from source in the ring buffer.

int lastInChrBuf

Last scaled horizontal chroma line from source in the ring buffer.

int lumBufIndex

Index in ring buffer of the last scaled horizontal luma/alpha line from source.

int chrBufIndex

Index in ring buffer of the last scaled horizontal chroma line from source.

Horizontal and vertical filters.

To better understand the following fields, here is a pseudo-code of their usage in filtering a horizontal line:

for (i = 0; i < width; i++) { dst[i] = 0; for (j = 0; j < filterSize; j++) dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ]; dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point. }

int16_t * hLumFilter

Array of horizontal filter coefficients for luma/alpha planes.

int16_t * hChrFilter

Array of horizontal filter coefficients for chroma planes.

int16_t * vLumFilter

Array of vertical filter coefficients for luma/alpha planes.

int16_t * vChrFilter

Array of vertical filter coefficients for chroma planes.

int32_t * hLumFilterPos

Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.

int32_t * hChrFilterPos

Array of horizontal filter starting positions for each dst[i] for chroma planes.

int32_t * vLumFilterPos

Array of vertical filter starting positions for each dst[i] for luma/alpha planes.

int32_t * vChrFilterPos

Array of vertical filter starting positions for each dst[i] for chroma planes.

int hLumFilterSize

Horizontal filter size for luma/alpha pixels.

int hChrFilterSize

Horizontal filter size for chroma pixels.

int vLumFilterSize

Vertical filter size for luma/alpha pixels.

int vChrFilterSize

Vertical filter size for chroma pixels.

void(* readLumPlanar )(uint8_t *dst, const uint8_t *src[4], int width)

Functions to read planar input, such as planar RGB, and convert internally to Y/UV.

void(* readChrPlanar )(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width)

void(* hyscale_fast )(struct SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)

Scale one horizontal line of input data using a bilinear filter to produce one line of output data.

void(* hcscale_fast )(struct SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth, const uint8_t *src1, const uint8_t *src2, int srcW, int xInc)

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

Scale one horizontal line of input data using a filter over the input lines, to produce one (differently sized) line of output data.

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

Detailed Description

Definition at line 224 of file swscale_internal.h.

Field Documentation

int32_t SwsContext::alpMmxFilter[4 *MAX_FILTER_SIZE]

Definition at line 387 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), and swScale().

int16_t** SwsContext::alpPixBuf

Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.

Definition at line 273 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), find_c_packed_planar_out_funcs(), sws_freeContext(), sws_init_context(), sws_init_swScale_c(), and swScale().

void(* SwsContext::alpToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal)

Unscaled conversion of alpha plane to YV12 for horizontal scaler.

Referenced by ff_sws_init_swScale_mmx(), hyscale(), and sws_init_swScale_c().

const AVClass* SwsContext::av_class

info on struct for av_log

Definition at line 228 of file swscale_internal.h.

Referenced by sws_alloc_context().

uint64_t SwsContext::blueDither

Definition at line 369 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST().

int SwsContext::brightness

Definition at line 328 of file swscale_internal.h.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

int SwsContext::canMMX2BeUsed

Definition at line 317 of file swscale_internal.h.

Referenced by sws_init_context().

int SwsContext::chrBufIndex

Index in ring buffer of the last scaled horizontal chroma line from source.

Definition at line 279 of file swscale_internal.h.

Referenced by swScale().

void(* SwsContext::chrConvertRange)(int16_t *dst1, int16_t *dst2, int width)

Color range conversion function for chroma planes if needed.

Referenced by hcscale(), and sws_init_swScale_c().

const uint8_t* SwsContext::chrDither8

Definition at line 396 of file swscale_internal.h.

Referenced by swScale(), and yuv2nv12cX_c().

int SwsContext::chrDstH

Height of destination chroma planes.

Definition at line 241 of file swscale_internal.h.

Referenced by sws_init_context().

int SwsContext::chrDstHSubSample

Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.

Definition at line 251 of file swscale_internal.h.

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

int SwsContext::chrDstVSubSample

Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.

Definition at line 252 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), ff_get_unscaled_swscale(), planarCopyWrapper(), sws_init_context(), sws_scale(), and swScale().

int SwsContext::chrDstW

Width of destination chroma planes.

Definition at line 240 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

uint8_t* SwsContext::chrMmx2FilterCode

Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma planes.

Definition at line 315 of file swscale_internal.h.

Referenced by sws_freeContext(), and sws_init_context().

int SwsContext::chrMmx2FilterCodeSize

Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma planes.

Definition at line 313 of file swscale_internal.h.

Referenced by sws_freeContext(), and sws_init_context().

int32_t SwsContext::chrMmxFilter[4 *MAX_FILTER_SIZE]

Definition at line 380 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), and swScale().

int SwsContext::chrSrcH

Height of source chroma planes.

Definition at line 239 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), and sws_init_context().

int SwsContext::chrSrcHSubSample

Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.

Definition at line 249 of file swscale_internal.h.

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

int SwsContext::chrSrcVSubSample

Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.

Definition at line 250 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), sws_init_context(), sws_scale(), and swScale().

int SwsContext::chrSrcW

Width of source chroma planes.

Definition at line 238 of file swscale_internal.h.

Referenced by sws_init_context(), swScale(), and yvu9ToYv12Wrapper().

void(* SwsContext::chrToYV12)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal)

Unscaled conversion of chroma planes to YV12 for horizontal scaler.

Referenced by ff_sws_init_swScale_mmx(), hcscale(), and sws_init_swScale_c().

int16_t** SwsContext::chrUPixBuf

Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.

Definition at line 271 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_freeContext(), sws_init_context(), and swScale().

int16_t** SwsContext::chrVPixBuf

Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.

Definition at line 272 of file swscale_internal.h.

Referenced by sws_freeContext(), sws_init_context(), and swScale().

int SwsContext::chrXInc

Definition at line 242 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::chrYInc

Definition at line 243 of file swscale_internal.h.

Referenced by sws_init_context().

int SwsContext::contrast

Definition at line 328 of file swscale_internal.h.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

uint16_t SwsContext::dither16[8]

Definition at line 393 of file swscale_internal.h.

uint32_t SwsContext::dither32[8]

Definition at line 394 of file swscale_internal.h.

int SwsContext::dst0Alpha

Definition at line 334 of file swscale_internal.h.

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

int SwsContext::dstBpc

Definition at line 248 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), sws_init_context(), and sws_init_swScale_c().

int SwsContext::dstColorspaceTable[4]

Definition at line 330 of file swscale_internal.h.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

enum PixelFormat SwsContext::dstFormat

int SwsContext::dstFormatBpp

Number of bits per pixel of the destination pixel format.

Definition at line 246 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), ff_yuv2rgb_c_init_tables(), findRgbConvFn(), rgbToRgbWrapper(), sws_init_context(), and sws_setColorspaceDetails().

int SwsContext::dstH

Height of destination luma/alpha planes.

Definition at line 237 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), ff_get_unscaled_swscale(), selfTest(), sws_getCachedContext(), sws_getContext(), sws_init_context(), sws_scale(), and swScale().

int SwsContext::dstRange

0 = MPG YUV range, 1 = JPG YUV range (destination image).

Definition at line 332 of file swscale_internal.h.

Referenced by sws_getCachedContext(), sws_getColorspaceDetails(), sws_getContext(), sws_init_context(), sws_init_swScale_c(), and sws_setColorspaceDetails().

int SwsContext::dstW

Width of destination luma/alpha planes.

Definition at line 381 of file swscale_internal.h.

Referenced by ff_yuv2rgb_init_vis(), mlib_YUV2ABGR420_32(), mlib_YUV2ARGB420_32(), mlib_YUV2RGB420_24(), selfTest(), sws_getCachedContext(), sws_getContext(), sws_init_context(), swScale(), vis_420P_ARGB32(), vis_422P_ARGB32(), yuv2bgr24_X_ar_TMPL(), yuv2bgr24_X_TMPL(), yuv2rgb32_X_ar_TMPL(), yuv2rgb32_X_TMPL(), yuv2rgb555_X_ar_TMPL(), yuv2rgb555_X_TMPL(), yuv2rgb565_X_ar_TMPL(), yuv2rgb565_X_TMPL(), yuv2yuvX_TMPL(), yuv2yuyv422_X_ar_TMPL(), and yuv2yuyv422_X_TMPL().

int SwsContext::dstY

Last destination vertical line output from last slice.

Definition at line 319 of file swscale_internal.h.

Referenced by swScale().

uint64_t SwsContext::esp

Definition at line 382 of file swscale_internal.h.

int SwsContext::flags

Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...

Definition at line 320 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), ff_get_unscaled_swscale(), ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), ff_swscale_get_unscaled_altivec(), find_c_packed_planar_out_funcs(), sws_getCachedContext(), sws_getContext(), sws_init_context(), sws_init_swScale_c(), and swScale().

uint8_t* SwsContext::formatConvBuffer

Definition at line 282 of file swscale_internal.h.

Referenced by sws_freeContext(), sws_init_context(), and swScale().

uint64_t SwsContext::greenDither

Definition at line 368 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST().

int16_t* SwsContext::hChrFilter

Array of horizontal filter coefficients for chroma planes.

Definition at line 299 of file swscale_internal.h.

Referenced by sws_freeContext(), sws_init_context(), and swScale().

int32_t* SwsContext::hChrFilterPos

Array of horizontal filter starting positions for each dst[i] for chroma planes.

Definition at line 303 of file swscale_internal.h.

Referenced by sws_freeContext(), sws_init_context(), and swScale().

int SwsContext::hChrFilterSize

Horizontal filter size for chroma pixels.

Definition at line 307 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_mmx(), sws_init_context(), and swScale().

void(* SwsContext::hcScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)

Referenced by ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), hcscale(), and sws_init_swScale_c().

void(* SwsContext::hcscale_fast)(struct SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth, const uint8_t *src1, const uint8_t *src2, int srcW, int xInc)

Referenced by hcscale(), and sws_init_swScale_c().

int16_t* SwsContext::hLumFilter

Array of horizontal filter coefficients for luma/alpha planes.

Definition at line 298 of file swscale_internal.h.

Referenced by sws_freeContext(), sws_init_context(), and swScale().

int32_t* SwsContext::hLumFilterPos

Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.

Definition at line 302 of file swscale_internal.h.

Referenced by sws_freeContext(), sws_init_context(), and swScale().

int SwsContext::hLumFilterSize

Horizontal filter size for luma/alpha pixels.

Definition at line 306 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_mmx(), sws_init_context(), and swScale().

void(* SwsContext::hyScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)

Scale one horizontal line of input data using a filter over the input lines, to produce one (differently sized) line of output data.

Parameters:

	dst	pointer to destination buffer for horizontally scaled data. If the number of bits per component of one destination pixel (SwsContext->dstBpc) is <= 10, data will be 15bpc in 16bits (int16_t) width. Else (i.e. SwsContext->dstBpc == 16), data will be 19bpc in 32bits (int32_t) width.
	dstW	width of destination image
	src	pointer to source data to be scaled. If the number of bits per component of a source pixel (SwsContext->srcBpc) is 8, this is 8bpc in 8bits (uint8_t) width. Else (i.e. SwsContext->dstBpc > 8), this is native depth in 16bits (uint16_t) width. In other words, for 9-bit YUV input, this is 9bpc, for 10-bit YUV input, this is 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
	filter	filter coefficients to be used per output pixel for scaling. This contains 14bpp filtering coefficients. Guaranteed to contain dstW * filterSize entries.
	filterPos	position of the first input pixel to be used for each output pixel during scaling. Guaranteed to contain dstW entries.
	filterSize	the number of input coefficients to be used (and thus the number of input pixels to be used) for creating a single output pixel. Is aligned to 4 (and input coefficients thus padded with zeroes) to simplify creating SIMD code.

Referenced by ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), hyscale(), and sws_init_swScale_c().

void(* SwsContext::hyscale_fast)(struct SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src, int srcW, int xInc)

Scale one horizontal line of input data using a bilinear filter to produce one line of output data.

Compared to SwsContext->hScale(), please take note of the following caveats when using these:

Scaling is done using only 7bit instead of 14bit coefficients.
You can use no more than 5 input pixels to produce 4 output pixels. Therefore, this filter should not be used for downscaling by more than ~20% in width (because that equals more than 5/4th downscaling and thus more than 5 pixels input per 4 pixels output).
In general, bilinear filters create artifacts during downscaling (even when <20%), because one output pixel will span more than one input pixel, and thus some pixels will need edges of both neighbor pixels to interpolate the output pixel. Since you can use at most two input pixels per output pixel in bilinear scaling, this is impossible and thus downscaling by any size will create artifacts. To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR in SwsContext->flags.

Referenced by hyscale(), and sws_init_swScale_c().

int SwsContext::lastInChrBuf

Last scaled horizontal chroma line from source in the ring buffer.

Definition at line 277 of file swscale_internal.h.

Referenced by swScale().

int SwsContext::lastInLumBuf

Last scaled horizontal luma/alpha line from source in the ring buffer.

Definition at line 276 of file swscale_internal.h.

Referenced by swScale().

int SwsContext::lumBufIndex

Index in ring buffer of the last scaled horizontal luma/alpha line from source.

Definition at line 278 of file swscale_internal.h.

Referenced by swScale().

void(* SwsContext::lumConvertRange)(int16_t *dst, int width)

Color range conversion function for luma plane if needed.

Referenced by hyscale(), and sws_init_swScale_c().

const uint8_t * SwsContext::lumDither8

Definition at line 396 of file swscale_internal.h.

Referenced by swScale().

uint8_t* SwsContext::lumMmx2FilterCode

Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.

Definition at line 314 of file swscale_internal.h.

Referenced by sws_freeContext(), and sws_init_context().

int SwsContext::lumMmx2FilterCodeSize

Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.

Definition at line 312 of file swscale_internal.h.

Referenced by sws_freeContext(), and sws_init_context().

int32_t SwsContext::lumMmxFilter[4 *MAX_FILTER_SIZE]

Definition at line 379 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), and swScale().

int16_t** SwsContext::lumPixBuf

Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.

Definition at line 270 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_freeContext(), sws_init_context(), and swScale().

void(* SwsContext::lumToYV12)(uint8_t *dst, const uint8_t *src, const uint8_t *src2, const uint8_t *src3, int width, uint32_t *pal)

Unscaled conversion of luma plane to YV12 for horizontal scaler.

Referenced by ff_sws_init_swScale_mmx(), hyscale(), and sws_init_swScale_c().

int SwsContext::lumXInc

Definition at line 242 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::lumYInc

Definition at line 243 of file swscale_internal.h.

Referenced by sws_init_context().

int SwsContext::needs_hcscale

Set if there are chroma planes to be converted.

Definition at line 529 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), and swScale().

uint32_t SwsContext::pal_rgb[256]

Definition at line 258 of file swscale_internal.h.

Referenced by palToRgbWrapper(), and sws_scale().

uint32_t SwsContext::pal_yuv[256]

Definition at line 257 of file swscale_internal.h.

Referenced by sws_scale(), and swScale().

double SwsContext::param[2]

Input parameters for scaling algorithms that need them.

Definition at line 255 of file swscale_internal.h.

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

void(* SwsContext::readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width)

Referenced by hcscale(), and sws_init_swScale_c().

void(* SwsContext::readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width)

Functions to read planar input, such as planar RGB, and convert internally to Y/UV.

Referenced by hyscale(), and sws_init_swScale_c().

uint64_t SwsContext::redDither

Definition at line 367 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST().

int SwsContext::saturation

Definition at line 328 of file swscale_internal.h.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

int SwsContext::sliceDir

Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).

Definition at line 254 of file swscale_internal.h.

Referenced by sws_scale().

int SwsContext::src0Alpha

Definition at line 333 of file swscale_internal.h.

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

int SwsContext::srcBpc

Definition at line 248 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_altivec(), sws_init_context(), and sws_init_swScale_c().

int SwsContext::srcColorspaceTable[4]

Definition at line 329 of file swscale_internal.h.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

int SwsContext::srcFormatBpp

Number of bits per pixel of the source pixel format.

Definition at line 247 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), findRgbConvFn(), rgbToRgbWrapper(), sws_init_context(), and sws_setColorspaceDetails().

int SwsContext::srcH

Height of source luma/alpha planes.

Definition at line 236 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), ff_yuv2rgb_init_altivec(), selfTest(), sws_getCachedContext(), sws_getContext(), sws_init_context(), and sws_scale().

int SwsContext::srcRange

0 = MPG YUV range, 1 = JPG YUV range (source image).

Definition at line 331 of file swscale_internal.h.

Referenced by planarCopyWrapper(), sws_getCachedContext(), sws_getColorspaceDetails(), sws_getContext(), sws_init_context(), sws_init_swScale_c(), and sws_setColorspaceDetails().

SwsFunc SwsContext::swScale

Note that src, dst, srcStride, dstStride will be copied in the sws_scale() wrapper so they can be freely modified here.

Definition at line 234 of file swscale_internal.h.

Referenced by ff_bfin_get_unscaled_swscale(), ff_get_unscaled_swscale(), ff_swscale_get_unscaled_altivec(), sws_init_context(), and sws_scale().

uint8_t* SwsContext::table_bU[256+2 *YUVRGB_TABLE_HEADROOM]

Definition at line 325 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb_1_c_template(), yuv2rgb_2_c_template(), and yuv2rgb_X_c_template().

uint8_t* SwsContext::table_gU[256+2 *YUVRGB_TABLE_HEADROOM]

Definition at line 323 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2mono_1_c_template(), yuv2mono_2_c_template(), yuv2mono_X_c_template(), yuv2rgb_1_c_template(), yuv2rgb_2_c_template(), and yuv2rgb_X_c_template().

int SwsContext::table_gV[256+2 *YUVRGB_TABLE_HEADROOM]

Definition at line 324 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2mono_1_c_template(), yuv2mono_2_c_template(), yuv2mono_X_c_template(), yuv2rgb_1_c_template(), yuv2rgb_2_c_template(), and yuv2rgb_X_c_template().

uint8_t* SwsContext::table_rV[256+2 *YUVRGB_TABLE_HEADROOM]

Definition at line 322 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb_1_c_template(), yuv2rgb_2_c_template(), and yuv2rgb_X_c_template().

uint64_t SwsContext::u_temp

Definition at line 384 of file swscale_internal.h.

uint64_t SwsContext::ubCoeff

Definition at line 373 of file swscale_internal.h.

Referenced by bfin_prepare_coefficients(), ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

uint64_t SwsContext::ugCoeff

Definition at line 375 of file swscale_internal.h.

Referenced by bfin_prepare_coefficients(), ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

uint64_t SwsContext::uOffset

Definition at line 377 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

int SwsContext::use_mmx_vfilter

Definition at line 426 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_mmx(), and swScale().

ptrdiff_t SwsContext::uv_off

offset (in pixels) between u and v planes

Definition at line 391 of file swscale_internal.h.

Referenced by sws_init_context(), yuv2bgr24_X_ar_TMPL(), yuv2bgr24_X_TMPL(), yuv2rgb32_X_ar_TMPL(), yuv2rgb32_X_TMPL(), yuv2rgb555_X_ar_TMPL(), yuv2rgb555_X_TMPL(), yuv2rgb565_X_ar_TMPL(), yuv2rgb565_X_TMPL(), yuv2yuyv422_X_ar_TMPL(), and yuv2yuyv422_X_TMPL().

ptrdiff_t SwsContext::uv_offx2

offset (in bytes) between u and v planes

Definition at line 392 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

uint64_t SwsContext::v_temp

Definition at line 385 of file swscale_internal.h.

int SwsContext::vChrBufSize

Number of vertical chroma lines allocated in the ring buffer.

Definition at line 275 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_freeContext(), sws_init_context(), and swScale().

int SwsContext::vChrDrop

Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.

Definition at line 253 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int16_t* SwsContext::vChrFilter

Array of vertical filter coefficients for chroma planes.

Definition at line 301 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_freeContext(), sws_init_context(), and swScale().

int32_t* SwsContext::vChrFilterPos

Array of vertical filter starting positions for each dst[i] for chroma planes.

Definition at line 305 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_freeContext(), sws_init_context(), and swScale().

int SwsContext::vChrFilterSize

Vertical filter size for chroma pixels.

Definition at line 309 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_init_context(), and swScale().

uint64_t SwsContext::vgCoeff

Definition at line 374 of file swscale_internal.h.

Referenced by bfin_prepare_coefficients(), ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

int SwsContext::vLumBufSize

Number of vertical luma/alpha lines allocated in the ring buffer.

Definition at line 274 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_freeContext(), sws_init_context(), and swScale().

int16_t* SwsContext::vLumFilter

Array of vertical filter coefficients for luma/alpha planes.

Definition at line 300 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_freeContext(), sws_init_context(), and swScale().

int32_t* SwsContext::vLumFilterPos

Array of vertical filter starting positions for each dst[i] for luma/alpha planes.

Definition at line 304 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_freeContext(), sws_init_context(), and swScale().

int SwsContext::vLumFilterSize

Vertical filter size for luma/alpha pixels.

Definition at line 308 of file swscale_internal.h.

Referenced by DECLARE_ASM_CONST(), sws_init_context(), and swScale().

uint64_t SwsContext::vOffset

Definition at line 378 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

uint64_t SwsContext::vrCoeff

Definition at line 372 of file swscale_internal.h.

Referenced by bfin_prepare_coefficients(), ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

uint64_t SwsContext::vRounder

Definition at line 383 of file swscale_internal.h.

Referenced by sws_init_context().

uint64_t SwsContext::y_temp

Definition at line 386 of file swscale_internal.h.

uint64_t SwsContext::yCoeff

Definition at line 371 of file swscale_internal.h.

Referenced by bfin_prepare_coefficients(), ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

uint64_t SwsContext::yOffset

Definition at line 376 of file swscale_internal.h.

Referenced by bfin_prepare_coefficients(), ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

yuv2interleavedX_fn SwsContext::yuv2nv12cX

Definition at line 431 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), and swScale().

yuv2packed1_fn SwsContext::yuv2packed1

Definition at line 432 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), and swScale().

yuv2packed2_fn SwsContext::yuv2packed2

Definition at line 433 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), and swScale().

yuv2packedX_fn SwsContext::yuv2packedX

Definition at line 434 of file swscale_internal.h.

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

yuv2planar1_fn SwsContext::yuv2plane1

Definition at line 429 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_mmx(), sws_init_swScale_c(), and swScale().

yuv2planarX_fn SwsContext::yuv2planeX

Definition at line 430 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), sws_init_swScale_c(), and swScale().

int SwsContext::yuv2rgb_u2b_coeff

Definition at line 340 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb48_1_c_template(), yuv2rgb48_2_c_template(), and yuv2rgb48_X_c_template().

int SwsContext::yuv2rgb_u2g_coeff

Definition at line 339 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb48_1_c_template(), yuv2rgb48_2_c_template(), and yuv2rgb48_X_c_template().

int SwsContext::yuv2rgb_v2g_coeff

Definition at line 338 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb48_1_c_template(), yuv2rgb48_2_c_template(), and yuv2rgb48_X_c_template().

int SwsContext::yuv2rgb_v2r_coeff

Definition at line 337 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb48_1_c_template(), yuv2rgb48_2_c_template(), and yuv2rgb48_X_c_template().

int SwsContext::yuv2rgb_y_coeff

Definition at line 336 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb48_1_c_template(), yuv2rgb48_2_c_template(), and yuv2rgb48_X_c_template().

int SwsContext::yuv2rgb_y_offset

Definition at line 335 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb48_1_c_template(), yuv2rgb48_2_c_template(), and yuv2rgb48_X_c_template().

void* SwsContext::yuvTable

Definition at line 321 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), and sws_freeContext().

The documentation for this struct was generated from the following file:

libswscale/swscale_internal.h


Data Fields
const AVClass *	av_class
	info on struct for av_log
SwsFunc	swScale
	Note that src, dst, srcStride, dstStride will be copied in the sws_scale() wrapper so they can be freely modified here.
int	srcW
	Width of source luma/alpha planes.
int	srcH
	Height of source luma/alpha planes.
int	dstH
	Height of destination luma/alpha planes.
int	chrSrcW
	Width of source chroma planes.
int	chrSrcH
	Height of source chroma planes.
int	chrDstW
	Width of destination chroma planes.
int	chrDstH
	Height of destination chroma planes.
int	lumXInc
int	chrXInc
int	lumYInc
int	chrYInc
enum PixelFormat	dstFormat
	Destination pixel format.
enum PixelFormat	srcFormat
	Source pixel format.
int	dstFormatBpp
	Number of bits per pixel of the destination pixel format.
int	srcFormatBpp
	Number of bits per pixel of the source pixel format.
int	dstBpc
int	srcBpc
int	chrSrcHSubSample
	Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source image.
int	chrSrcVSubSample
	Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image.
int	chrDstHSubSample
	Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
int	chrDstVSubSample
	Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination image.
int	vChrDrop
	Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
int	sliceDir
	Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
double	param [2]
	Input parameters for scaling algorithms that need them.
uint32_t	pal_yuv [256]
uint32_t	pal_rgb [256]
uint8_t *	formatConvBuffer
int	lumMmx2FilterCodeSize
	Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.
int	chrMmx2FilterCodeSize
	Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma planes.
uint8_t *	lumMmx2FilterCode
	Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.
uint8_t *	chrMmx2FilterCode
	Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma planes.
int	canMMX2BeUsed
int	dstY
	Last destination vertical line output from last slice.
int	flags
	Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
void *	yuvTable
uint8_t *	table_rV [256+2 *YUVRGB_TABLE_HEADROOM]
uint8_t *	table_gU [256+2 *YUVRGB_TABLE_HEADROOM]
int	table_gV [256+2 *YUVRGB_TABLE_HEADROOM]
uint8_t *	table_bU [256+2 *YUVRGB_TABLE_HEADROOM]
int	contrast
int	brightness
int	saturation
int	srcColorspaceTable [4]
int	dstColorspaceTable [4]
int	srcRange
	0 = MPG YUV range, 1 = JPG YUV range (source image).
int	dstRange
	0 = MPG YUV range, 1 = JPG YUV range (destination image).
int	src0Alpha
int	dst0Alpha
int	yuv2rgb_y_offset
int	yuv2rgb_y_coeff
int	yuv2rgb_v2r_coeff
int	yuv2rgb_v2g_coeff
int	yuv2rgb_u2g_coeff
int	yuv2rgb_u2b_coeff
uint64_t	redDither
uint64_t	greenDither
uint64_t	blueDither
uint64_t	yCoeff
uint64_t	vrCoeff
uint64_t	ubCoeff
uint64_t	vgCoeff
uint64_t	ugCoeff
uint64_t	yOffset
uint64_t	uOffset
uint64_t	vOffset
int32_t	lumMmxFilter [4 *MAX_FILTER_SIZE]
int32_t	chrMmxFilter [4 *MAX_FILTER_SIZE]
int	dstW
	Width of destination luma/alpha planes.
uint64_t	esp
uint64_t	vRounder
uint64_t	u_temp
uint64_t	v_temp
uint64_t	y_temp
int32_t	alpMmxFilter [4 *MAX_FILTER_SIZE]
ptrdiff_t	uv_off
	offset (in pixels) between u and v planes
ptrdiff_t	uv_offx2
	offset (in bytes) between u and v planes
uint16_t	dither16 [8]
uint32_t	dither32 [8]
const uint8_t *	chrDither8
const uint8_t *	lumDither8
int	use_mmx_vfilter
yuv2planar1_fn	yuv2plane1
yuv2planarX_fn	yuv2planeX
yuv2interleavedX_fn	yuv2nv12cX
yuv2packed1_fn	yuv2packed1
yuv2packed2_fn	yuv2packed2
yuv2packedX_fn	yuv2packedX
void(*	lumToYV12 )(uint8_t dst, const uint8_t src, const uint8_t src2, const uint8_t src3, int width, uint32_t *pal)
	Unscaled conversion of luma plane to YV12 for horizontal scaler.
void(*	alpToYV12 )(uint8_t dst, const uint8_t src, const uint8_t src2, const uint8_t src3, int width, uint32_t *pal)
	Unscaled conversion of alpha plane to YV12 for horizontal scaler.
void(*	chrToYV12 )(uint8_t dstU, uint8_t dstV, const uint8_t src1, const uint8_t src2, const uint8_t src3, int width, uint32_t pal)
	Unscaled conversion of chroma planes to YV12 for horizontal scaler.
void(*	lumConvertRange )(int16_t *dst, int width)
	Color range conversion function for luma plane if needed.
void(*	chrConvertRange )(int16_t dst1, int16_t dst2, int width)
	Color range conversion function for chroma planes if needed.
int	needs_hcscale
	Set if there are chroma planes to be converted.
Scaled horizontal lines ring buffer.
The horizontal scaler keeps just enough scaled lines in a ring buffer so they may be passed to the vertical scaler. The pointers to the allocated buffers for each line are duplicated in sequence in the ring buffer to simplify indexing and avoid wrapping around between lines inside the vertical scaler code. The wrapping is done before the vertical scaler is called.
int16_t **	lumPixBuf
	Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.
int16_t **	chrUPixBuf
	Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
int16_t **	chrVPixBuf
	Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
int16_t **	alpPixBuf
	Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.
int	vLumBufSize
	Number of vertical luma/alpha lines allocated in the ring buffer.
int	vChrBufSize
	Number of vertical chroma lines allocated in the ring buffer.
int	lastInLumBuf
	Last scaled horizontal luma/alpha line from source in the ring buffer.
int	lastInChrBuf
	Last scaled horizontal chroma line from source in the ring buffer.
int	lumBufIndex
	Index in ring buffer of the last scaled horizontal luma/alpha line from source.
int	chrBufIndex
	Index in ring buffer of the last scaled horizontal chroma line from source.
Horizontal and vertical filters.
To better understand the following fields, here is a pseudo-code of their usage in filtering a horizontal line: for (i = 0; i < width; i++) { dst[i] = 0; for (j = 0; j < filterSize; j++) dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ]; dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point. }
int16_t *	hLumFilter
	Array of horizontal filter coefficients for luma/alpha planes.
int16_t *	hChrFilter
	Array of horizontal filter coefficients for chroma planes.
int16_t *	vLumFilter
	Array of vertical filter coefficients for luma/alpha planes.
int16_t *	vChrFilter
	Array of vertical filter coefficients for chroma planes.
int32_t *	hLumFilterPos
	Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
int32_t *	hChrFilterPos
	Array of horizontal filter starting positions for each dst[i] for chroma planes.
int32_t *	vLumFilterPos
	Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
int32_t *	vChrFilterPos
	Array of vertical filter starting positions for each dst[i] for chroma planes.
int	hLumFilterSize
	Horizontal filter size for luma/alpha pixels.
int	hChrFilterSize
	Horizontal filter size for chroma pixels.
int	vLumFilterSize
	Vertical filter size for luma/alpha pixels.
int	vChrFilterSize
	Vertical filter size for chroma pixels.

void(*	readLumPlanar )(uint8_t dst, const uint8_t src[4], int width)
	Functions to read planar input, such as planar RGB, and convert internally to Y/UV.
void(*	readChrPlanar )(uint8_t dstU, uint8_t dstV, const uint8_t *src[4], int width)

void(*	hyscale_fast )(struct SwsContext c, int16_t dst, int dstWidth, const uint8_t *src, int srcW, int xInc)
	Scale one horizontal line of input data using a bilinear filter to produce one line of output data.
void(*	hcscale_fast )(struct SwsContext c, int16_t dst1, int16_t dst2, int dstWidth, const uint8_t src1, const uint8_t *src2, int srcW, int xInc)

void(*	hyScale )(struct SwsContext c, int16_t dst, int dstW, const uint8_t src, const int16_t filter, const int32_t *filterPos, int filterSize)
	Scale one horizontal line of input data using a filter over the input lines, to produce one (differently sized) line of output data.
void(*	hcScale )(struct SwsContext c, int16_t dst, int dstW, const uint8_t src, const int16_t filter, const int32_t *filterPos, int filterSize)