SDL_yuv_c.h File Reference

#include "../SDL_internal.h"

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Functions
int	SDL_ConvertPixels_YUV_to_RGB (int width, int height, Uint32 src_format, const void *src, int src_pitch, Uint32 dst_format, void *dst, int dst_pitch)
int	SDL_ConvertPixels_RGB_to_YUV (int width, int height, Uint32 src_format, const void *src, int src_pitch, Uint32 dst_format, void *dst, int dst_pitch)
int	SDL_ConvertPixels_YUV_to_YUV (int width, int height, Uint32 src_format, const void *src, int src_pitch, Uint32 dst_format, void *dst, int dst_pitch)

Function Documentation

SDL_ConvertPixels_RGB_to_YUV()

int SDL_ConvertPixels_RGB_to_YUV	(	int	width,
		int	height,
		Uint32	src_format,
		const void *	src,
		int	src_pitch,
		Uint32	dst_format,
		void *	dst,
		int	dst_pitch
	)

Definition at line 784 of file SDL_yuv.c.

{
#if 0 /* Doesn't handle odd widths */
    /* RGB24 to FOURCC */
    if (src_format == SDL_PIXELFORMAT_RGB24) {
        Uint8 *y;
        Uint8 *u;
        Uint8 *v;
        Uint32 y_stride;
        Uint32 uv_stride;
        YCbCrType yuv_type;
 
        if (GetYUVPlanes(width, height, dst_format, dst, dst_pitch, (const Uint8 **)&y, (const Uint8 **)&u, (const Uint8 **)&v, &y_stride, &uv_stride) < 0) {
            return -1;
        }
 
        if (GetYUVConversionType(width, height, &yuv_type) < 0) {
            return -1;
        }
 
        rgb24_yuv420_std(width, height, src, src_pitch, y, u, v, y_stride, uv_stride, yuv_type);
        return 0;
    }
#endif
 
    /* ARGB8888 to FOURCC */
    if (src_format == SDL_PIXELFORMAT_ARGB8888) {
        return SDL_ConvertPixels_ARGB8888_to_YUV(width, height, src, src_pitch, dst_format, dst, dst_pitch);
    }
 
    /* not ARGB8888 to FOURCC : need an intermediate conversion */
    {
        int ret;
        void *tmp;
        int tmp_pitch = (width * sizeof(Uint32));
 
        tmp = SDL_malloc(tmp_pitch * height);
        if (tmp == NULL) {
            return SDL_OutOfMemory();
        }
 
        /* convert src/src_format to tmp/ARGB8888 */
        ret = SDL_ConvertPixels(width, height, src_format, src, src_pitch, SDL_PIXELFORMAT_ARGB8888, tmp, tmp_pitch);
        if (ret == -1) {
            SDL_free(tmp);
            return ret;
        }
 
        /* convert tmp/ARGB8888 to dst/FOURCC */
        ret = SDL_ConvertPixels_ARGB8888_to_YUV(width, height, tmp, tmp_pitch, dst_format, dst, dst_pitch);
        SDL_free(tmp);
        return ret;
    }
}

References GetYUVConversionType(), GetYUVPlanes(), NULL, rgb24_yuv420_std(), SDL_ConvertPixels, SDL_ConvertPixels_ARGB8888_to_YUV(), SDL_free, SDL_malloc, SDL_OutOfMemory, SDL_PIXELFORMAT_ARGB8888, SDL_PIXELFORMAT_RGB24, and RGB2YUVFactors::u.

Referenced by SDL_ConvertPixels().

SDL_ConvertPixels_YUV_to_RGB()

int SDL_ConvertPixels_YUV_to_RGB	(	int	width,
		int	height,
		Uint32	src_format,
		const void *	src,
		int	src_pitch,
		Uint32	dst_format,
		void *	dst,
		int	dst_pitch
	)

Definition at line 395 of file SDL_yuv.c.

{
    const Uint8 *y = NULL;
    const Uint8 *u = NULL;
    const Uint8 *v = NULL;
    Uint32 y_stride = 0;
    Uint32 uv_stride = 0;
    YCbCrType yuv_type = YCBCR_601;
 
    if (GetYUVPlanes(width, height, src_format, src, src_pitch, &y, &u, &v, &y_stride, &uv_stride) < 0) {
        return -1;
    }
 
    if (GetYUVConversionType(width, height, &yuv_type) < 0) {
        return -1;
    }
 
    if (yuv_rgb_sse(src_format, dst_format, width, height, y, u, v, y_stride, uv_stride, (Uint8*)dst, dst_pitch, yuv_type)) {
        return 0;
    }
 
    if (yuv_rgb_std(src_format, dst_format, width, height, y, u, v, y_stride, uv_stride, (Uint8*)dst, dst_pitch, yuv_type)) {
        return 0;
    }
 
    /* No fast path for the RGB format, instead convert using an intermediate buffer */
    if (dst_format != SDL_PIXELFORMAT_ARGB8888) {
        int ret;
        void *tmp;
        int tmp_pitch = (width * sizeof(Uint32));
 
        tmp = SDL_malloc(tmp_pitch * height);
        if (tmp == NULL) {
            return SDL_OutOfMemory();
        }
 
        /* convert src/src_format to tmp/ARGB8888 */
        ret = SDL_ConvertPixels_YUV_to_RGB(width, height, src_format, src, src_pitch, SDL_PIXELFORMAT_ARGB8888, tmp, tmp_pitch);
        if (ret < 0) {
            SDL_free(tmp);
            return ret;
        }
 
        /* convert tmp/ARGB8888 to dst/RGB */
        ret = SDL_ConvertPixels(width, height, SDL_PIXELFORMAT_ARGB8888, tmp, tmp_pitch, dst_format, dst, dst_pitch);
        SDL_free(tmp);
        return ret;
    }
 
    return SDL_SetError("Unsupported YUV conversion");
}

References GetYUVConversionType(), GetYUVPlanes(), NULL, SDL_ConvertPixels, SDL_ConvertPixels_YUV_to_RGB(), SDL_free, SDL_malloc, SDL_OutOfMemory, SDL_PIXELFORMAT_ARGB8888, SDL_SetError, YCBCR_601, yuv_rgb_sse(), and yuv_rgb_std().

Referenced by SDL_ConvertPixels(), and SDL_ConvertPixels_YUV_to_RGB().

SDL_ConvertPixels_YUV_to_YUV()

int SDL_ConvertPixels_YUV_to_YUV	(	int	width,
		int	height,
		Uint32	src_format,
		const void *	src,
		int	src_pitch,
		Uint32	dst_format,
		void *	dst,
		int	dst_pitch
	)

Definition at line 1810 of file SDL_yuv.c.

{
    if (src_format == dst_format) {
        if (src == dst) {
            /* Nothing to do */
            return 0;
        }
        return SDL_ConvertPixels_YUV_to_YUV_Copy(width, height, src_format, src, src_pitch, dst, dst_pitch);
    }
 
    if (IsPlanar2x2Format(src_format) && IsPlanar2x2Format(dst_format)) {
        return SDL_ConvertPixels_Planar2x2_to_Planar2x2(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
    } else if (IsPacked4Format(src_format) && IsPacked4Format(dst_format)) {
        return SDL_ConvertPixels_Packed4_to_Packed4(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
    } else if (IsPlanar2x2Format(src_format) && IsPacked4Format(dst_format)) {
        return SDL_ConvertPixels_Planar2x2_to_Packed4(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
    } else if (IsPacked4Format(src_format) && IsPlanar2x2Format(dst_format)) {
        return SDL_ConvertPixels_Packed4_to_Planar2x2(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
    } else {
        return SDL_SetError("SDL_ConvertPixels_YUV_to_YUV: Unsupported YUV conversion: %s -> %s", SDL_GetPixelFormatName(src_format), SDL_GetPixelFormatName(dst_format));
    }
}

References IsPacked4Format(), IsPlanar2x2Format(), SDL_ConvertPixels_Packed4_to_Packed4(), SDL_ConvertPixels_Packed4_to_Planar2x2(), SDL_ConvertPixels_Planar2x2_to_Packed4(), SDL_ConvertPixels_Planar2x2_to_Planar2x2(), SDL_ConvertPixels_YUV_to_YUV_Copy(), SDL_GetPixelFormatName, and SDL_SetError.

Referenced by SDL_ConvertPixels().