FFmpeg: SwsContext Struct Reference

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, int32_t *rgb2yuv)

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

void(* readChrPlanar )(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width, int32_t *rgb2yuv)

void(* readAlpPlanar )(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv)

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

Examples:: doc/examples/muxing.c, and doc/examples/scaling_video.c.

Definition at line 259 of file swscale_internal.h.

Field Documentation

const AVClass* SwsContext::av_class

info on struct for av_log

Definition at line 263 of file swscale_internal.h.

Referenced by sws_alloc_context().

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 269 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().

int SwsContext::srcW

Width of source luma/alpha planes.

Definition at line 270 of file swscale_internal.h.

Referenced by altivec_uyvy_rgb32(), bgr24ToYv12Wrapper(), doTest(), ff_swscale_get_unscaled_altivec(), ff_yuv2rgb_init_altivec(), packedCopyWrapper(), palToRgbWrapper(), planarCopyWrapper(), planarRgb16ToRgb16Wrapper(), planarRgbToplanarRgbWrapper(), planarRgbToRgbWrapper(), planarToNv12Wrapper(), planarToUyvyWrapper(), planarToYuy2Wrapper(), rgbToPlanarRgbWrapper(), rgbToRgbWrapper(), selfTest(), sws_getCachedContext(), sws_getContext(), sws_init_context(), sws_scale(), swScale(), uyvyToYuv420Wrapper(), uyvyToYuv422Wrapper(), yuv422pToUyvyWrapper(), yuv422pToYuy2Wrapper(), yuyvToYuv420Wrapper(), yuyvToYuv422Wrapper(), yv12touyvy_unscaled_altivec(), yv12toyuy2_unscaled_altivec(), and yvu9ToYv12Wrapper().

int SwsContext::srcH

Height of source luma/alpha planes.

Definition at line 271 of file swscale_internal.h.

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

int SwsContext::dstH

Height of destination luma/alpha planes.

Definition at line 272 of file swscale_internal.h.

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

int SwsContext::chrSrcW

Width of source chroma planes.

Definition at line 273 of file swscale_internal.h.

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

int SwsContext::chrSrcH

Height of source chroma planes.

Definition at line 274 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::chrDstW

Width of destination chroma planes.

Definition at line 275 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::chrDstH

Height of destination chroma planes.

Definition at line 276 of file swscale_internal.h.

Referenced by sws_init_context().

int SwsContext::lumXInc

Definition at line 277 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::chrXInc

Definition at line 277 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::lumYInc

Definition at line 278 of file swscale_internal.h.

Referenced by sws_init_context().

int SwsContext::chrYInc

Definition at line 278 of file swscale_internal.h.

Referenced by sws_init_context().

enum AVPixelFormat SwsContext::dstFormat

Destination pixel format.

Definition at line 279 of file swscale_internal.h.

Referenced by ff_bfin_get_unscaled_swscale(), ff_get_unscaled_swscale(), ff_sws_init_output_funcs(), ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), ff_swscale_get_unscaled_altivec(), ff_yuv2rgb_c_init_tables(), ff_yuv2rgb_get_func_ptr_bfin(), ff_yuv2rgb_init_altivec(), ff_yuv2rgb_init_mmx(), ff_yuv2rgb_init_vis(), findRgbConvFn(), palToRgbWrapper(), planarCopyWrapper(), planarRgb16ToRgb16Wrapper(), planarRgbToRgbWrapper(), planarToNv12Wrapper(), rgbToPlanarRgbWrapper(), rgbToRgbWrapper(), selfTest(), sws_getCachedContext(), sws_getColorspaceDetails(), sws_getContext(), sws_init_context(), sws_init_swScale_c(), sws_init_swScale_TMPL(), sws_scale(), sws_setColorspaceDetails(), swScale(), yuv2nv12cX_c(), and yuv2packedX_altivec().

enum AVPixelFormat SwsContext::srcFormat

Source pixel format.

Definition at line 280 of file swscale_internal.h.

Referenced by doTest(), ff_bfin_get_unscaled_swscale(), ff_get_unscaled_swscale(), ff_sws_init_swScale_mmx(), ff_swscale_get_unscaled_altivec(), ff_yuv2rgb_c_init_tables(), ff_yuv2rgb_init_altivec(), ff_yuv2rgb_init_mmx(), ff_yuv2rgb_init_vis(), findRgbConvFn(), hScale16To15_c(), hScale16To19_c(), palToRgbWrapper(), planarCopyWrapper(), planarRgb16ToRgb16Wrapper(), planarRgbToRgbWrapper(), rgbToPlanarRgbWrapper(), rgbToRgbWrapper(), selfTest(), sws_getCachedContext(), sws_getContext(), sws_init_context(), sws_init_swScale_c(), sws_scale(), sws_setColorspaceDetails(), swScale(), and xyz12Torgb48().

int SwsContext::dstFormatBpp

Number of bits per pixel of the destination pixel format.

Definition at line 281 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::srcFormatBpp

Number of bits per pixel of the source pixel format.

Definition at line 282 of file swscale_internal.h.

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

int SwsContext::dstBpc

Definition at line 283 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::srcBpc

Definition at line 283 of file swscale_internal.h.

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

int SwsContext::chrSrcHSubSample

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

Definition at line 284 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), and sws_init_context().

int SwsContext::chrSrcVSubSample

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

Definition at line 285 of file swscale_internal.h.

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

int SwsContext::chrDstHSubSample

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

Definition at line 286 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 287 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), packed_16bpc_bswap(), planarCopyWrapper(), sws_init_context(), sws_scale(), and swScale().

int SwsContext::vChrDrop

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

Definition at line 288 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::sliceDir

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

Definition at line 289 of file swscale_internal.h.

Referenced by sws_scale().

double SwsContext::param[2]

Input parameters for scaling algorithms that need them.

Definition at line 290 of file swscale_internal.h.

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

uint32_t SwsContext::pal_yuv[256]

Definition at line 292 of file swscale_internal.h.

Referenced by sws_scale(), and swScale().

uint32_t SwsContext::pal_rgb[256]

Definition at line 293 of file swscale_internal.h.

Referenced by palToRgbWrapper(), and sws_scale().

int16_t** SwsContext::lumPixBuf

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

Definition at line 305 of file swscale_internal.h.

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

int16_t** SwsContext::chrUPixBuf

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

Definition at line 306 of file swscale_internal.h.

Referenced by 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 307 of file swscale_internal.h.

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

int16_t** SwsContext::alpPixBuf

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

Definition at line 308 of file swscale_internal.h.

Referenced by ff_sws_init_output_funcs(), ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), sws_freeContext(), sws_init_context(), and swScale().

int SwsContext::vLumBufSize

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

Definition at line 309 of file swscale_internal.h.

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

int SwsContext::vChrBufSize

Number of vertical chroma lines allocated in the ring buffer.

Definition at line 310 of file swscale_internal.h.

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

int SwsContext::lastInLumBuf

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

Definition at line 311 of file swscale_internal.h.

Referenced by swScale().

int SwsContext::lastInChrBuf

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

Definition at line 312 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 313 of file swscale_internal.h.

Referenced by swScale().

int SwsContext::chrBufIndex

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

Definition at line 314 of file swscale_internal.h.

Referenced by swScale().

uint8_t* SwsContext::formatConvBuffer

Definition at line 317 of file swscale_internal.h.

Referenced by hcscale(), hyscale(), rgbToRgbWrapper(), sws_freeContext(), sws_init_context(), and swScale().

int16_t* SwsContext::hLumFilter

Array of horizontal filter coefficients for luma/alpha planes.

Definition at line 333 of file swscale_internal.h.

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

int16_t* SwsContext::hChrFilter

Array of horizontal filter coefficients for chroma planes.

Definition at line 334 of file swscale_internal.h.

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

int16_t* SwsContext::vLumFilter

Array of vertical filter coefficients for luma/alpha planes.

Definition at line 335 of file swscale_internal.h.

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

int16_t* SwsContext::vChrFilter

Array of vertical filter coefficients for chroma planes.

Definition at line 336 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 337 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 338 of file swscale_internal.h.

Referenced by 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 339 of file swscale_internal.h.

Referenced by 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 340 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 341 of file swscale_internal.h.

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

int SwsContext::hChrFilterSize

Horizontal filter size for chroma pixels.

Definition at line 342 of file swscale_internal.h.

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

int SwsContext::vLumFilterSize

Vertical filter size for luma/alpha pixels.

Definition at line 343 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::vChrFilterSize

Vertical filter size for chroma pixels.

Definition at line 344 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

int SwsContext::lumMmxextFilterCodeSize

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

Definition at line 347 of file swscale_internal.h.

Referenced by sws_freeContext(), and sws_init_context().

int SwsContext::chrMmxextFilterCodeSize

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

Definition at line 348 of file swscale_internal.h.

Referenced by sws_freeContext(), and sws_init_context().

uint8_t* SwsContext::lumMmxextFilterCode

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

Definition at line 349 of file swscale_internal.h.

Referenced by sws_freeContext(), and sws_init_context().

uint8_t* SwsContext::chrMmxextFilterCode

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

Definition at line 350 of file swscale_internal.h.

Referenced by sws_freeContext(), and sws_init_context().

int SwsContext::canMMXEXTBeUsed

Definition at line 352 of file swscale_internal.h.

Referenced by sws_init_context().

int SwsContext::dstY

Last destination vertical line output from last slice.

Definition at line 354 of file swscale_internal.h.

Referenced by swScale().

int SwsContext::flags

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

Definition at line 355 of file swscale_internal.h.

Referenced by ff_get_unscaled_swscale(), ff_sws_init_output_funcs(), ff_sws_init_swScale_altivec(), ff_sws_init_swScale_mmx(), ff_swscale_get_unscaled_altivec(), sws_getCachedContext(), sws_getContext(), sws_init_context(), sws_init_swScale_c(), sws_scale(), swScale(), yuv2mono_1_c_template(), yuv2mono_2_c_template(), and yuv2mono_X_c_template().

void* SwsContext::yuvTable

Definition at line 356 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), and sws_freeContext().

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

Definition at line 357 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 358 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().

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

Definition at line 359 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_bU[256+2 *YUVRGB_TABLE_HEADROOM]

Definition at line 360 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().

int32_t SwsContext::input_rgb2yuv_table[16+40 *4]

Definition at line 361 of file swscale_internal.h.

Referenced by bgr24ToYv12Wrapper(), fill_rgb2yuv_table(), hcscale(), hyscale(), and swScale().

int* SwsContext::dither_error[4]

Definition at line 373 of file swscale_internal.h.

Referenced by sws_freeContext(), sws_init_context(), sws_scale(), yuv2mono_1_c_template(), yuv2mono_2_c_template(), yuv2mono_X_c_template(), yuv2rgb_full_1_c_template(), yuv2rgb_full_2_c_template(), and yuv2rgb_full_X_c_template().

int SwsContext::contrast

Definition at line 376 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), sws_getColorspaceDetails(), and sws_setColorspaceDetails().

int SwsContext::brightness

Definition at line 376 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), sws_getColorspaceDetails(), and sws_setColorspaceDetails().

int SwsContext::saturation

Definition at line 376 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), sws_getColorspaceDetails(), and sws_setColorspaceDetails().

int SwsContext::srcColorspaceTable[4]

Definition at line 377 of file swscale_internal.h.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

int SwsContext::dstColorspaceTable[4]

Definition at line 378 of file swscale_internal.h.

Referenced by sws_getColorspaceDetails(), and sws_setColorspaceDetails().

int SwsContext::srcRange

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

Definition at line 379 of file swscale_internal.h.

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

int SwsContext::dstRange

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

Definition at line 380 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::src0Alpha

Definition at line 381 of file swscale_internal.h.

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

int SwsContext::dst0Alpha

Definition at line 382 of file swscale_internal.h.

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

int SwsContext::srcXYZ

Definition at line 383 of file swscale_internal.h.

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

int SwsContext::dstXYZ

Definition at line 384 of file swscale_internal.h.

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

int SwsContext::yuv2rgb_y_offset

Definition at line 385 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), yuv2rgb48_1_c_template(), yuv2rgb48_2_c_template(), yuv2rgb48_X_c_template(), yuv2rgba64_1_c_template(), yuv2rgba64_2_c_template(), and yuv2rgba64_X_c_template().

int SwsContext::yuv2rgb_y_coeff

Definition at line 386 of file swscale_internal.h.

int SwsContext::yuv2rgb_v2r_coeff

Definition at line 387 of file swscale_internal.h.

int SwsContext::yuv2rgb_v2g_coeff

Definition at line 388 of file swscale_internal.h.

int SwsContext::yuv2rgb_u2g_coeff

Definition at line 389 of file swscale_internal.h.

int SwsContext::yuv2rgb_u2b_coeff

Definition at line 390 of file swscale_internal.h.

uint64_t SwsContext::redDither

Definition at line 417 of file swscale_internal.h.

uint64_t SwsContext::greenDither

Definition at line 418 of file swscale_internal.h.

uint64_t SwsContext::blueDither

Definition at line 419 of file swscale_internal.h.

uint64_t SwsContext::yCoeff

Definition at line 421 of file swscale_internal.h.

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

uint64_t SwsContext::vrCoeff

Definition at line 422 of file swscale_internal.h.

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

uint64_t SwsContext::ubCoeff

Definition at line 423 of file swscale_internal.h.

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

uint64_t SwsContext::vgCoeff

Definition at line 424 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 425 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 426 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 427 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

uint64_t SwsContext::vOffset

Definition at line 428 of file swscale_internal.h.

Referenced by ff_yuv2rgb_c_init_tables(), and ff_yuv2rgb_init_vis().

int32_t SwsContext::lumMmxFilter[4 *MAX_FILTER_SIZE]

Definition at line 429 of file swscale_internal.h.

Referenced by swScale().

int32_t SwsContext::chrMmxFilter[4 *MAX_FILTER_SIZE]

Definition at line 430 of file swscale_internal.h.

Referenced by swScale().

int SwsContext::dstW

Width of destination luma/alpha planes.

Definition at line 431 of file swscale_internal.h.

Referenced by ff_yuv2rgb_init_vis(), hScale16To15_c(), hScale16To19_c(), hScale8To15_c(), hScale8To19_c(), selfTest(), sws_getCachedContext(), sws_getContext(), sws_init_context(), sws_scale(), 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().

uint64_t SwsContext::esp

Definition at line 432 of file swscale_internal.h.

uint64_t SwsContext::vRounder

Definition at line 433 of file swscale_internal.h.

Referenced by sws_init_context().

uint64_t SwsContext::u_temp

Definition at line 434 of file swscale_internal.h.

uint64_t SwsContext::v_temp

Definition at line 435 of file swscale_internal.h.

uint64_t SwsContext::y_temp

Definition at line 436 of file swscale_internal.h.

int32_t SwsContext::alpMmxFilter[4 *MAX_FILTER_SIZE]

Definition at line 437 of file swscale_internal.h.

Referenced by swScale().

ptrdiff_t SwsContext::uv_off

offset (in pixels) between u and v planes

Definition at line 441 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 442 of file swscale_internal.h.

Referenced by sws_init_context(), and swScale().

uint16_t SwsContext::dither16[8]

Definition at line 443 of file swscale_internal.h.

uint32_t SwsContext::dither32[8]

Definition at line 444 of file swscale_internal.h.

const uint8_t* SwsContext::chrDither8

Definition at line 446 of file swscale_internal.h.

Referenced by swScale(), and yuv2nv12cX_c().

const uint8_t * SwsContext::lumDither8

Definition at line 446 of file swscale_internal.h.

Referenced by swScale().

int SwsContext::use_mmx_vfilter

Definition at line 476 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_mmx(), and swScale().

int16_t* SwsContext::xyzgamma

Definition at line 481 of file swscale_internal.h.

Referenced by fill_xyztables(), and xyz12Torgb48().

int16_t* SwsContext::rgbgamma

Definition at line 482 of file swscale_internal.h.

Referenced by fill_xyztables(), and xyz12Torgb48().

int16_t SwsContext::xyz2rgb_matrix[3][4]

Definition at line 483 of file swscale_internal.h.

Referenced by fill_xyztables(), and xyz12Torgb48().

yuv2planar1_fn SwsContext::yuv2plane1

Definition at line 486 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 487 of file swscale_internal.h.

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

yuv2interleavedX_fn SwsContext::yuv2nv12cX

Definition at line 488 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), and swScale().

yuv2packed1_fn SwsContext::yuv2packed1

Definition at line 489 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), and swScale().

yuv2packed2_fn SwsContext::yuv2packed2

Definition at line 490 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), and swScale().

yuv2packedX_fn SwsContext::yuv2packedX

Definition at line 491 of file swscale_internal.h.

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

yuv2anyX_fn SwsContext::yuv2anyX

Definition at line 492 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), 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.

Definition at line 495 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_mmx(), and hyscale().

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.

Definition at line 498 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_mmx(), and hyscale().

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.

Definition at line 501 of file swscale_internal.h.

Referenced by ff_sws_init_swScale_mmx(), and hcscale().

void(* SwsContext::readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv)

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

Definition at line 510 of file swscale_internal.h.

Referenced by hyscale().

void(* SwsContext::readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width, int32_t *rgb2yuv)

Definition at line 511 of file swscale_internal.h.

Referenced by hcscale().

void(* SwsContext::readAlpPlanar)(uint8_t *dst, const uint8_t *src[4], int width, int32_t *rgb2yuv)

Definition at line 513 of file swscale_internal.h.

Referenced by hyscale().

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.

Definition at line 535 of file swscale_internal.h.

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

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)

Definition at line 538 of file swscale_internal.h.

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

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.

Definition at line 575 of file swscale_internal.h.

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

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)

Definition at line 578 of file swscale_internal.h.

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

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

Color range conversion function for luma plane if needed.

Definition at line 584 of file swscale_internal.h.

Referenced by hyscale(), and sws_init_swScale_c().

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

Color range conversion function for chroma planes if needed.

Definition at line 586 of file swscale_internal.h.

Referenced by hcscale(), and sws_init_swScale_c().

int SwsContext::needs_hcscale

Set if there are chroma planes to be converted.

Definition at line 588 of file swscale_internal.h.

Referenced by sws_init_swScale_c(), and swScale().

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

libswscale/swscale_internal.h

Generated on Wed Jul 10 2013 23:48:39 for FFmpeg by doxygen 1.8.2