#endif
#include "libavutil/avutil.h"
+#include "libavutil/log.h"
+#include "libavutil/pixfmt.h"
+#include "libavutil/pixdesc.h"
#define STR(s) AV_TOSTRING(s) //AV_STRINGIFY is too long
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);
+
/* This struct should be aligned on at least a 32-byte boundary. */
typedef struct SwsContext {
/**
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, 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.
#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 "11*8+4*4*256*3+48"
-#define UV_OFFx2 "11*8+4*4*256*3+56"
+#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, v_temp);
DECLARE_ALIGNED(8, uint64_t, y_temp);
int32_t alpMmxFilter[4*MAX_FILTER_SIZE];
- 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
+ // 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_px); ///< offset (in pixels) between u and v planes
+ DECLARE_ALIGNED(8, ptrdiff_t, uv_off_byte); ///< 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;
#endif
/* function pointers for swScale() */
- void (*yuv2nv12X )(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,
- uint8_t *dest, uint8_t *uDest,
- int dstW, int chrDstW, int dstFormat);
- void (*yuv2yuv1 )(struct SwsContext *c,
- const int16_t *lumSrc, const int16_t *chrUSrc,
- const int16_t *chrVSrc, const int16_t *alpSrc,
- uint8_t *dest,
- uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
- int dstW, int chrDstW);
- void (*yuv2yuvX )(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,
- uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
- int dstW, int chrDstW);
- void (*yuv2packed1)(struct SwsContext *c,
- const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0,
- uint8_t *dest,
- int dstW, int uvalpha, int dstFormat, int flags, int y);
- void (*yuv2packed2)(struct SwsContext *c,
- const uint16_t *buf0, const uint16_t *buf1,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, const uint16_t *abuf1,
- uint8_t *dest,
- int dstW, int yalpha, int uvalpha, int y);
- void (*yuv2packedX)(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 dstY);
+ 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,
int width, uint32_t *pal); ///< Unscaled conversion of luma plane to YV12 for horizontal scaler.
void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
const uint8_t *src1, const uint8_t *src2,
int width, uint32_t *pal); ///< Unscaled conversion of chroma planes to YV12 for horizontal scaler.
+
+ /**
+ * 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);
int16_t *dst1, int16_t *dst2, int dstWidth,
const uint8_t *src1, const uint8_t *src2,
int srcW, int xInc);
+ /** @} */
- void (*hScale)(int16_t *dst, int dstW, const uint8_t *src, int srcW,
- int xInc, const int16_t *filter, const int16_t *filterPos,
- int filterSize);
-
- void (*lumConvertRange)(uint16_t *dst, int width); ///< Color range conversion function for luma plane if needed.
- void (*chrConvertRange)(uint16_t *dst1, uint16_t *dst2, int width); ///< Color range conversion function for chroma planes if needed.
+ /**
+ * 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 int16_t *filterPos,
+ int filterSize);
+ void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src,
+ const int16_t *filter, const int16_t *filterPos,
+ int filterSize);
+ /** @} */
+
+ 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.
const char *sws_format_name(enum PixelFormat format);
-//FIXME replace this with something faster
-#define is16BPS(x) ( \
- (x)==PIX_FMT_GRAY16BE \
- || (x)==PIX_FMT_GRAY16LE \
- || (x)==PIX_FMT_BGR48BE \
- || (x)==PIX_FMT_BGR48LE \
- || (x)==PIX_FMT_RGB48BE \
- || (x)==PIX_FMT_RGB48LE \
- || (x)==PIX_FMT_YUV420P16LE \
- || (x)==PIX_FMT_YUV422P16LE \
- || (x)==PIX_FMT_YUV444P16LE \
- || (x)==PIX_FMT_YUV420P16BE \
- || (x)==PIX_FMT_YUV422P16BE \
- || (x)==PIX_FMT_YUV444P16BE \
- )
-#define is9_OR_10BPS(x) ( \
- (x)==PIX_FMT_YUV420P9LE \
- || (x)==PIX_FMT_YUV420P9BE \
- || (x)==PIX_FMT_YUV420P10LE \
- || (x)==PIX_FMT_YUV420P10BE \
- )
-#define isBE(x) ((x)&1)
-#define isPlanar8YUV(x) ( \
- (x)==PIX_FMT_YUV410P \
- || (x)==PIX_FMT_YUV420P \
- || (x)==PIX_FMT_YUVA420P \
- || (x)==PIX_FMT_YUV411P \
- || (x)==PIX_FMT_YUV422P \
- || (x)==PIX_FMT_YUV444P \
- || (x)==PIX_FMT_YUV440P \
- || (x)==PIX_FMT_NV12 \
- || (x)==PIX_FMT_NV21 \
- )
-#define isPlanarYUV(x) ( \
- isPlanar8YUV(x) \
- || (x)==PIX_FMT_YUV420P9LE \
- || (x)==PIX_FMT_YUV420P10LE \
- || (x)==PIX_FMT_YUV420P16LE \
- || (x)==PIX_FMT_YUV422P16LE \
- || (x)==PIX_FMT_YUV444P16LE \
- || (x)==PIX_FMT_YUV420P9BE \
- || (x)==PIX_FMT_YUV420P10BE \
- || (x)==PIX_FMT_YUV420P16BE \
- || (x)==PIX_FMT_YUV422P16BE \
- || (x)==PIX_FMT_YUV444P16BE \
- )
-#define isYUV(x) ( \
- (x)==PIX_FMT_UYVY422 \
- || (x)==PIX_FMT_YUYV422 \
- || isPlanarYUV(x) \
- )
+#define is16BPS(x) \
+ (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 15)
+
+#define is9_OR_10BPS(x) \
+ (av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 8 || \
+ av_pix_fmt_descriptors[x].comp[0].depth_minus1 == 9)
+
+#define isBE(x) \
+ (av_pix_fmt_descriptors[x].flags & PIX_FMT_BE)
+
+#define isYUV(x) \
+ (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB) && \
+ av_pix_fmt_descriptors[x].nb_components >= 2)
+
+#define isPlanarYUV(x) \
+ ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR) && \
+ isYUV(x))
+
+#define isRGB(x) \
+ (av_pix_fmt_descriptors[x].flags & PIX_FMT_RGB)
+
+#if 0 // FIXME
+#define isGray(x) \
+ (!(av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) && \
+ av_pix_fmt_descriptors[x].nb_components <= 2)
+#else
#define isGray(x) ( \
(x)==PIX_FMT_GRAY8 \
|| (x)==PIX_FMT_Y400A \
|| (x)==PIX_FMT_GRAY16BE \
|| (x)==PIX_FMT_GRAY16LE \
)
-#define isGray16(x) ( \
- (x)==PIX_FMT_GRAY16BE \
- || (x)==PIX_FMT_GRAY16LE \
- )
+#endif
+
#define isRGBinInt(x) ( \
(x)==PIX_FMT_RGB48BE \
|| (x)==PIX_FMT_RGB48LE \
|| (x)==PIX_FMT_MONOBLACK \
|| (x)==PIX_FMT_MONOWHITE \
)
-#define isRGBinBytes(x) ( \
- (x)==PIX_FMT_RGB48BE \
- || (x)==PIX_FMT_RGB48LE \
- || (x)==PIX_FMT_RGBA \
- || (x)==PIX_FMT_ARGB \
- || (x)==PIX_FMT_RGB24 \
- )
-#define isBGRinBytes(x) ( \
- (x)==PIX_FMT_BGR48BE \
- || (x)==PIX_FMT_BGR48LE \
- || (x)==PIX_FMT_BGRA \
- || (x)==PIX_FMT_ABGR \
- || (x)==PIX_FMT_BGR24 \
- )
#define isAnyRGB(x) ( \
isRGBinInt(x) \
|| isBGRinInt(x) \
)
-#define isALPHA(x) ( \
- (x)==PIX_FMT_BGR32 \
- || (x)==PIX_FMT_BGR32_1 \
- || (x)==PIX_FMT_RGB32 \
- || (x)==PIX_FMT_RGB32_1 \
- || (x)==PIX_FMT_Y400A \
- || (x)==PIX_FMT_YUVA420P \
- )
-#define isPacked(x) ( \
- (x)==PIX_FMT_PAL8 \
- || (x)==PIX_FMT_YUYV422 \
- || (x)==PIX_FMT_UYVY422 \
- || (x)==PIX_FMT_Y400A \
- || isAnyRGB(x) \
+#define isALPHA(x) \
+ (av_pix_fmt_descriptors[x].nb_components == 2 || \
+ av_pix_fmt_descriptors[x].nb_components == 4)
+
+#define isPacked(x) (\
+ (av_pix_fmt_descriptors[x].nb_components >= 2 && \
+ !(av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR)) || \
+ (x) == PIX_FMT_PAL8\
)
+
+#define isPlanar(x) \
+ (av_pix_fmt_descriptors[x].nb_components >= 2 && \
+ (av_pix_fmt_descriptors[x].flags & PIX_FMT_PLANAR))
+
#define usePal(x) ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) || (x) == PIX_FMT_Y400A)
extern const uint64_t ff_dither4[2];
extern const AVClass sws_context_class;
/**
- * Sets c->swScale to an unscaled converter if one exists for the specific
+ * 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);
/**
- * Returns function pointer to fastest main scaler path function depending
+ * Return function pointer to fastest main scaler path function depending
* on architecture and available optimizations.
*/
SwsFunc ff_getSwsFunc(SwsContext *c);
projects / ffmpeg / blobdiff