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Diffstat (limited to 'ffmpeg/libswscale/swscale_internal.h')
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diff --git a/ffmpeg/libswscale/swscale_internal.h b/ffmpeg/libswscale/swscale_internal.h new file mode 100644 index 0000000..83d3a00 --- /dev/null +++ b/ffmpeg/libswscale/swscale_internal.h @@ -0,0 +1,840 @@ +/* + * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef SWSCALE_SWSCALE_INTERNAL_H +#define SWSCALE_SWSCALE_INTERNAL_H + +#include "config.h" + +#if HAVE_ALTIVEC_H +#include <altivec.h> +#endif + +#include "libavutil/avassert.h" +#include "libavutil/avutil.h" +#include "libavutil/common.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/log.h" +#include "libavutil/pixfmt.h" +#include "libavutil/pixdesc.h" + +#define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long + +#define YUVRGB_TABLE_HEADROOM 128 + +#define FAST_BGR2YV12 // use 7-bit instead of 15-bit coefficients + +#define MAX_FILTER_SIZE 256 + +#define DITHER1XBPP + +#if HAVE_BIGENDIAN +#define ALT32_CORR (-1) +#else +#define ALT32_CORR 1 +#endif + +#if ARCH_X86_64 +# define APCK_PTR2 8 +# define APCK_COEF 16 +# define APCK_SIZE 24 +#else +# define APCK_PTR2 4 +# define APCK_COEF 8 +# define APCK_SIZE 16 +#endif + +struct SwsContext; + +typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[], + int srcStride[], int srcSliceY, int srcSliceH, + uint8_t *dst[], int dstStride[]); + +/** + * Write one line of horizontally scaled data to planar output + * without any additional vertical scaling (or point-scaling). + * + * @param src scaled source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param dest pointer to the output plane. For >8bit + * output, this is in uint16_t + * @param dstW width of destination in pixels + * @param dither ordered dither array of type int16_t and size 8 + * @param offset Dither offset + */ +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 + * with multi-point vertical scaling between input pixels. + * + * @param filter vertical luma/alpha scaling coefficients, 12bit [0,4096] + * @param src scaled luma (Y) or alpha (A) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param filterSize number of vertical input lines to scale + * @param dest pointer to output plane. For >8bit + * output, this is in uint16_t + * @param dstW width of destination pixels + * @param offset Dither offset + */ +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 chroma to interleaved output + * with multi-point vertical scaling between input pixels. + * + * @param c SWS scaling context + * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096] + * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrFilterSize number of vertical chroma input lines to scale + * @param dest pointer to the output plane. For >8bit + * output, this is in uint16_t + * @param dstW width of chroma planes + */ +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 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. + * + * @param c SWS scaling context + * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param dest pointer to the output plane. For 16bit output, this is + * uint16_t + * @param dstW width of lumSrc and alpSrc in pixels, number of pixels + * to write into dest[] + * @param 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) + * @param 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. + */ +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 by doing bilinear scaling between two input lines. + * + * @param c SWS scaling context + * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param dest pointer to the output plane. For 16bit output, this is + * uint16_t + * @param dstW width of lumSrc and alpSrc in pixels, number of pixels + * to write into dest[] + * @param yalpha luma/alpha scaling coefficients for the second input line. + * The first line's coefficients can be calculated by using + * 4096 - yalpha + * @param uvalpha chroma scaling coefficient for the second input line. The + * first line's coefficients can be calculated by using + * 4096 - uvalpha + * @param 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. + */ +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 multi-point vertical scaling between input pixels. + * + * @param c SWS scaling context + * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096] + * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param lumFilterSize number of vertical luma/alpha input lines to scale + * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096] + * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrFilterSize number of vertical chroma input lines to scale + * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param dest pointer to the output plane. For 16bit output, this is + * uint16_t + * @param dstW width of lumSrc and alpSrc in pixels, number of pixels + * to write into dest[] + * @param 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. + */ +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 YUV/RGB + * output by doing multi-point vertical scaling between input pixels. + * + * @param c SWS scaling context + * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096] + * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param lumFilterSize number of vertical luma/alpha input lines to scale + * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096] + * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param chrFilterSize number of vertical chroma input lines to scale + * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output, + * 19-bit for 16bit output (in int32_t) + * @param dest pointer to the output planes. For 16bit output, this is + * uint16_t + * @param dstW width of lumSrc and alpSrc in pixels, number of pixels + * to write into dest[] + * @param 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. + */ +typedef void (*yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter, + const int16_t **lumSrc, int lumFilterSize, + const int16_t *chrFilter, + const int16_t **chrUSrc, + const int16_t **chrVSrc, int chrFilterSize, + const int16_t **alpSrc, uint8_t **dest, + int dstW, int y); + +/* This struct should be aligned on at least a 32-byte boundary. */ +typedef struct SwsContext { + /** + * info on struct for av_log + */ + const AVClass *av_class; + + /** + * Note that src, dst, srcStride, dstStride will be copied in the + * sws_scale() wrapper so they can be freely modified here. + */ + SwsFunc swScale; + 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, chrXInc; + int lumYInc, chrYInc; + enum AVPixelFormat dstFormat; ///< Destination pixel format. + enum AVPixelFormat 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, 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]; + + /** + * @name 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. + //@} + + uint8_t *formatConvBuffer; + + /** + * @name Horizontal and vertical filters. + * To better understand the following fields, here is a pseudo-code of + * their usage in filtering a horizontal line: + * @code + * 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. + * } + * @endcode + */ + //@{ + 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. + //@} + + int lumMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes. + int chrMmxextFilterCodeSize; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes. + uint8_t *lumMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes. + uint8_t *chrMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes. + + int canMMXEXTBeUsed; + + 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; // pointer to the yuv->rgb table start so it can be freed() + 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 *dither_error[4]; + + //Colorspace stuff + int contrast, brightness, saturation; // for sws_getColorspaceDetails + 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; + +#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" //do not change, it is hardcoded in the ASM +#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" + + DECLARE_ALIGNED(8, uint64_t, redDither); + DECLARE_ALIGNED(8, uint64_t, greenDither); + DECLARE_ALIGNED(8, uint64_t, blueDither); + + DECLARE_ALIGNED(8, uint64_t, yCoeff); + DECLARE_ALIGNED(8, uint64_t, vrCoeff); + DECLARE_ALIGNED(8, uint64_t, ubCoeff); + DECLARE_ALIGNED(8, uint64_t, vgCoeff); + DECLARE_ALIGNED(8, uint64_t, ugCoeff); + DECLARE_ALIGNED(8, uint64_t, yOffset); + DECLARE_ALIGNED(8, uint64_t, uOffset); + DECLARE_ALIGNED(8, 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. + DECLARE_ALIGNED(8, uint64_t, esp); + DECLARE_ALIGNED(8, uint64_t, vRounder); + DECLARE_ALIGNED(8, uint64_t, u_temp); + DECLARE_ALIGNED(8, uint64_t, v_temp); + DECLARE_ALIGNED(8, uint64_t, y_temp); + int32_t alpMmxFilter[4 * MAX_FILTER_SIZE]; + // alignment of these values is not necessary, but merely here + // to maintain the same offset across x8632 and x86-64. Once we + // use proper offset macros in the asm, they can be removed. + DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes + DECLARE_ALIGNED(8, ptrdiff_t, uv_offx2); ///< offset (in bytes) between u and v planes + DECLARE_ALIGNED(8, uint16_t, dither16)[8]; + DECLARE_ALIGNED(8, uint32_t, dither32)[8]; + + const uint8_t *chrDither8, *lumDither8; + +#if HAVE_ALTIVEC + vector signed short CY; + vector signed short CRV; + vector signed short CBU; + vector signed short CGU; + vector signed short CGV; + vector signed short OY; + vector unsigned short CSHIFT; + vector signed short *vYCoeffsBank, *vCCoeffsBank; +#endif + +#if ARCH_BFIN + DECLARE_ALIGNED(4, uint32_t, oy); + DECLARE_ALIGNED(4, uint32_t, oc); + DECLARE_ALIGNED(4, uint32_t, zero); + DECLARE_ALIGNED(4, uint32_t, cy); + DECLARE_ALIGNED(4, uint32_t, crv); + DECLARE_ALIGNED(4, uint32_t, rmask); + DECLARE_ALIGNED(4, uint32_t, cbu); + DECLARE_ALIGNED(4, uint32_t, bmask); + DECLARE_ALIGNED(4, uint32_t, cgu); + DECLARE_ALIGNED(4, uint32_t, cgv); + DECLARE_ALIGNED(4, uint32_t, gmask); +#endif + +#if HAVE_VIS + DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10]; +#endif + int use_mmx_vfilter; + + /* function pointers for swScale() */ + yuv2planar1_fn yuv2plane1; + yuv2planarX_fn yuv2planeX; + yuv2interleavedX_fn yuv2nv12cX; + yuv2packed1_fn yuv2packed1; + yuv2packed2_fn yuv2packed2; + yuv2packedX_fn yuv2packedX; + yuv2anyX_fn yuv2anyX; + + /// Unscaled conversion of luma plane to YV12 for horizontal scaler. + 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 alpha 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 chroma planes 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); + + /** + * Functions to read planar input, such as planar RGB, and convert + * internally to Y/UV. + */ + /** @{ */ + void (*readLumPlanar)(uint8_t *dst, const uint8_t *src[4], int width); + void (*readChrPlanar)(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], + int width); + /** @} */ + + /** + * 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. + */ + /** @{ */ + void (*hyscale_fast)(struct SwsContext *c, + int16_t *dst, int dstWidth, + const uint8_t *src, int srcW, int xInc); + 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); + /** @} */ + + /** + * Scale one horizontal line of input data using a filter over the input + * lines, to produce one (differently sized) line of output data. + * + * @param 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. + * @param dstW width of destination image + * @param 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. + * @param filter filter coefficients to be used per output pixel for + * scaling. This contains 14bpp filtering coefficients. + * Guaranteed to contain dstW * filterSize entries. + * @param filterPos position of the first input pixel to be used for + * each output pixel during scaling. Guaranteed to + * contain dstW entries. + * @param 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. + */ + /** @{ */ + void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW, + const uint8_t *src, const int16_t *filter, + const int32_t *filterPos, int filterSize); + void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW, + const uint8_t *src, const int16_t *filter, + const int32_t *filterPos, int filterSize); + /** @} */ + + /// Color range conversion function for luma plane if needed. + void (*lumConvertRange)(int16_t *dst, int width); + /// Color range conversion function for chroma planes if needed. + void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width); + + int needs_hcscale; ///< Set if there are chroma planes to be converted. +} SwsContext; +//FIXME check init (where 0) + +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); + +#if FF_API_SWS_FORMAT_NAME +/** + * @deprecated Use av_get_pix_fmt_name() instead. + */ +attribute_deprecated +const char *sws_format_name(enum AVPixelFormat format); +#endif + +static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return desc->comp[0].depth_minus1 == 15; +} + +static av_always_inline int is9_OR_10BPS(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return desc->comp[0].depth_minus1 >= 8 && desc->comp[0].depth_minus1 <= 13; +} + +#define isNBPS(x) is9_OR_10BPS(x) + +static av_always_inline int isBE(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return desc->flags & PIX_FMT_BE; +} + +static av_always_inline int isYUV(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return !(desc->flags & PIX_FMT_RGB) && desc->nb_components >= 2; +} + +static av_always_inline int isPlanarYUV(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return ((desc->flags & PIX_FMT_PLANAR) && isYUV(pix_fmt)); +} + +static av_always_inline int isRGB(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return (desc->flags & PIX_FMT_RGB); +} + +#if 0 // FIXME +#define isGray(x) \ + (!(av_pix_fmt_desc_get(x)->flags & PIX_FMT_PAL) && \ + av_pix_fmt_desc_get(x)->nb_components <= 2) +#else +#define isGray(x) \ + ((x) == AV_PIX_FMT_GRAY8 || \ + (x) == AV_PIX_FMT_Y400A || \ + (x) == AV_PIX_FMT_GRAY16BE || \ + (x) == AV_PIX_FMT_GRAY16LE) +#endif + +#define isRGBinInt(x) \ + ( \ + (x) == AV_PIX_FMT_RGB48BE || \ + (x) == AV_PIX_FMT_RGB48LE || \ + (x) == AV_PIX_FMT_RGBA64BE || \ + (x) == AV_PIX_FMT_RGBA64LE || \ + (x) == AV_PIX_FMT_RGB32 || \ + (x) == AV_PIX_FMT_RGB32_1 || \ + (x) == AV_PIX_FMT_RGB24 || \ + (x) == AV_PIX_FMT_RGB565BE || \ + (x) == AV_PIX_FMT_RGB565LE || \ + (x) == AV_PIX_FMT_RGB555BE || \ + (x) == AV_PIX_FMT_RGB555LE || \ + (x) == AV_PIX_FMT_RGB444BE || \ + (x) == AV_PIX_FMT_RGB444LE || \ + (x) == AV_PIX_FMT_RGB8 || \ + (x) == AV_PIX_FMT_RGB4 || \ + (x) == AV_PIX_FMT_RGB4_BYTE || \ + (x) == AV_PIX_FMT_MONOBLACK || \ + (x) == AV_PIX_FMT_MONOWHITE \ + ) +#define isBGRinInt(x) \ + ( \ + (x) == AV_PIX_FMT_BGR48BE || \ + (x) == AV_PIX_FMT_BGR48LE || \ + (x) == AV_PIX_FMT_BGRA64BE || \ + (x) == AV_PIX_FMT_BGRA64LE || \ + (x) == AV_PIX_FMT_BGR32 || \ + (x) == AV_PIX_FMT_BGR32_1 || \ + (x) == AV_PIX_FMT_BGR24 || \ + (x) == AV_PIX_FMT_BGR565BE || \ + (x) == AV_PIX_FMT_BGR565LE || \ + (x) == AV_PIX_FMT_BGR555BE || \ + (x) == AV_PIX_FMT_BGR555LE || \ + (x) == AV_PIX_FMT_BGR444BE || \ + (x) == AV_PIX_FMT_BGR444LE || \ + (x) == AV_PIX_FMT_BGR8 || \ + (x) == AV_PIX_FMT_BGR4 || \ + (x) == AV_PIX_FMT_BGR4_BYTE || \ + (x) == AV_PIX_FMT_MONOBLACK || \ + (x) == AV_PIX_FMT_MONOWHITE \ + ) + +#define isRGBinBytes(x) ( \ + (x) == AV_PIX_FMT_RGB48BE \ + || (x) == AV_PIX_FMT_RGB48LE \ + || (x) == AV_PIX_FMT_RGBA64BE \ + || (x) == AV_PIX_FMT_RGBA64LE \ + || (x) == AV_PIX_FMT_RGBA \ + || (x) == AV_PIX_FMT_ARGB \ + || (x) == AV_PIX_FMT_RGB24 \ + ) +#define isBGRinBytes(x) ( \ + (x) == AV_PIX_FMT_BGR48BE \ + || (x) == AV_PIX_FMT_BGR48LE \ + || (x) == AV_PIX_FMT_BGRA64BE \ + || (x) == AV_PIX_FMT_BGRA64LE \ + || (x) == AV_PIX_FMT_BGRA \ + || (x) == AV_PIX_FMT_ABGR \ + || (x) == AV_PIX_FMT_BGR24 \ + ) + +#define isAnyRGB(x) \ + ( \ + isRGBinInt(x) || \ + isBGRinInt(x) || \ + isRGB(x) || \ + (x)==AV_PIX_FMT_GBRP9LE || \ + (x)==AV_PIX_FMT_GBRP9BE || \ + (x)==AV_PIX_FMT_GBRP10LE || \ + (x)==AV_PIX_FMT_GBRP10BE || \ + (x)==AV_PIX_FMT_GBRP12LE || \ + (x)==AV_PIX_FMT_GBRP12BE || \ + (x)==AV_PIX_FMT_GBRP14LE || \ + (x)==AV_PIX_FMT_GBRP14BE || \ + (x)==AV_PIX_FMT_GBR24P \ + ) + +static av_always_inline int isALPHA(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return desc->flags & PIX_FMT_ALPHA; +} + +#if 1 +#define isPacked(x) ( \ + (x)==AV_PIX_FMT_PAL8 \ + || (x)==AV_PIX_FMT_YUYV422 \ + || (x)==AV_PIX_FMT_UYVY422 \ + || (x)==AV_PIX_FMT_Y400A \ + || isRGBinInt(x) \ + || isBGRinInt(x) \ + ) +#else +static av_always_inline int isPacked(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return ((desc->nb_components >= 2 && !(desc->flags & PIX_FMT_PLANAR)) || + pix_fmt == AV_PIX_FMT_PAL8); +} + +#endif +static av_always_inline int isPlanar(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return (desc->nb_components >= 2 && (desc->flags & PIX_FMT_PLANAR)); +} + +static av_always_inline int isPackedRGB(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return ((desc->flags & (PIX_FMT_PLANAR | PIX_FMT_RGB)) == PIX_FMT_RGB); +} + +static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return ((desc->flags & (PIX_FMT_PLANAR | PIX_FMT_RGB)) == + (PIX_FMT_PLANAR | PIX_FMT_RGB)); +} + +static av_always_inline int usePal(enum AVPixelFormat pix_fmt) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); + av_assert0(desc); + return (desc->flags & PIX_FMT_PAL) || (desc->flags & PIX_FMT_PSEUDOPAL); +} + +extern const uint64_t ff_dither4[2]; +extern const uint64_t ff_dither8[2]; +extern const uint8_t dithers[8][8][8]; +extern const uint16_t dither_scale[15][16]; + + +extern const AVClass sws_context_class; + +/** + * Set c->swScale to an unscaled converter if one exists for the specific + * source and destination formats, bit depths, flags, etc. + */ +void ff_get_unscaled_swscale(SwsContext *c); + +void ff_swscale_get_unscaled_altivec(SwsContext *c); + +/** + * Return function pointer to fastest main scaler path function depending + * on architecture and available optimizations. + */ +SwsFunc ff_getSwsFunc(SwsContext *c); + +void ff_sws_init_input_funcs(SwsContext *c); +void ff_sws_init_output_funcs(SwsContext *c, + yuv2planar1_fn *yuv2plane1, + yuv2planarX_fn *yuv2planeX, + yuv2interleavedX_fn *yuv2nv12cX, + yuv2packed1_fn *yuv2packed1, + yuv2packed2_fn *yuv2packed2, + yuv2packedX_fn *yuv2packedX, + yuv2anyX_fn *yuv2anyX); +void ff_sws_init_swScale_altivec(SwsContext *c); +void ff_sws_init_swScale_mmx(SwsContext *c); + +static inline void fillPlane16(uint8_t *plane, int stride, int width, int height, int y, + int alpha, int bits, const int big_endian) +{ + int i, j; + uint8_t *ptr = plane + stride * y; + int v = alpha ? 0xFFFF>>(15-bits) : (1<<bits); + for (i = 0; i < height; i++) { +#define FILL(wfunc) \ + for (j = 0; j < width; j++) {\ + wfunc(ptr+2*j, v);\ + } + if (big_endian) { + FILL(AV_WB16); + } else { + FILL(AV_WL16); + } + ptr += stride; + } +} + +#endif /* SWSCALE_SWSCALE_INTERNAL_H */ |