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Diffstat (limited to 'x11vnc/misc/turbovnc/turbojpeg.h')
| -rw-r--r-- | x11vnc/misc/turbovnc/turbojpeg.h | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/x11vnc/misc/turbovnc/turbojpeg.h b/x11vnc/misc/turbovnc/turbojpeg.h new file mode 100644 index 0000000..8a6af05 --- /dev/null +++ b/x11vnc/misc/turbovnc/turbojpeg.h @@ -0,0 +1,229 @@ +/* Copyright (C)2004 Landmark Graphics + * Copyright (C)2005, 2006 Sun Microsystems, Inc. + * + * This library is free software and may be redistributed and/or modified under + * the terms of the wxWindows Library License, Version 3 or (at your option) + * any later version. The full license is in the LICENSE.txt file included + * with this distribution. + * + * This library 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 + * wxWindows Library License for more details. + */ + +#if (defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__)) && defined(_WIN32) && defined(DLLDEFINE) +#define DLLEXPORT __declspec(dllexport) +#else +#define DLLEXPORT +#endif + +#define DLLCALL + +/* Subsampling */ +#define NUMSUBOPT 4 + +enum {TJ_444=0, TJ_422, TJ_411, TJ_GRAYSCALE}; + +/* Flags */ +#define TJ_BGR 1 +#define TJ_BOTTOMUP 2 +#define TJ_FORCEMMX 8 /* Force IPP to use MMX code even if SSE available */ +#define TJ_FORCESSE 16 /* Force IPP to use SSE1 code even if SSE2 available */ +#define TJ_FORCESSE2 32 /* Force IPP to use SSE2 code (useful if auto-detect is not working properly) */ +#define TJ_ALPHAFIRST 64 /* BGR buffer is ABGR and RGB buffer is ARGB */ +#define TJ_FORCESSE3 128 /* Force IPP to use SSE3 code (useful if auto-detect is not working properly) */ + +typedef void* tjhandle; + +#define TJPAD(p) (((p)+3)&(~3)) +#ifndef max + #define max(a,b) ((a)>(b)?(a):(b)) +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/* API follows */ + + +/* + tjhandle tjInitCompress(void) + + Creates a new JPEG compressor instance, allocates memory for the structures, + and returns a handle to the instance. Most applications will only + need to call this once at the beginning of the program or once for each + concurrent thread. Don't try to create a new instance every time you + compress an image, because this will cause performance to suffer. + + RETURNS: NULL on error +*/ +DLLEXPORT tjhandle DLLCALL tjInitCompress(void); + + +/* + int tjCompress(tjhandle j, + unsigned char *srcbuf, int width, int pitch, int height, int pixelsize, + unsigned char *dstbuf, unsigned long *size, + int jpegsubsamp, int jpegqual, int flags) + + [INPUT] j = instance handle previously returned from a call to + tjInitCompress() + [INPUT] srcbuf = pointer to user-allocated image buffer containing pixels in + RGB(A) or BGR(A) form + [INPUT] width = width (in pixels) of the source image + [INPUT] pitch = bytes per line of the source image (width*pixelsize if the + bitmap is unpadded, else TJPAD(width*pixelsize) if each line of the bitmap + is padded to the nearest 32-bit boundary, such as is the case for Windows + bitmaps. You can also be clever and use this parameter to skip lines, etc., + as long as the pitch is greater than 0.) + [INPUT] height = height (in pixels) of the source image + [INPUT] pixelsize = size (in bytes) of each pixel in the source image + RGBA and BGRA: 4, RGB and BGR: 3 + [INPUT] dstbuf = pointer to user-allocated image buffer which will receive + the JPEG image. Use the macro TJBUFSIZE(width, height) to determine + the appropriate size for this buffer based on the image width and height. + [OUTPUT] size = pointer to unsigned long which receives the size (in bytes) + of the compressed image + [INPUT] jpegsubsamp = Specifies either 4:1:1, 4:2:2, or 4:4:4 subsampling. + When the image is converted from the RGB to YCbCr colorspace as part of the + JPEG compression process, every other Cb and Cr (chrominance) pixel can be + discarded to produce a smaller image with little perceptible loss of + image clarity (the human eye is more sensitive to small changes in + brightness than small changes in color.) + + TJ_411: 4:1:1 subsampling. Discards every other Cb, Cr pixel in both + horizontal and vertical directions. + TJ_422: 4:2:2 subsampling. Discards every other Cb, Cr pixel only in + the horizontal direction. + TJ_444: no subsampling. + TJ_GRAYSCALE: Generate grayscale JPEG image + + [INPUT] jpegqual = JPEG quality (an integer between 0 and 100 inclusive.) + [INPUT] flags = the bitwise OR of one or more of the following + + TJ_BGR: The components of each pixel in the source image are stored in + B,G,R order, not R,G,B + TJ_BOTTOMUP: The source image is stored in bottom-up (Windows) order, + not top-down + TJ_FORCEMMX: Valid only for the Intel Performance Primitives implementation + of this codec-- force IPP to use MMX code (bypass CPU auto-detection) + TJ_FORCESSE: Valid only for the Intel Performance Primitives implementation + of this codec-- force IPP to use SSE code (bypass CPU auto-detection) + TJ_FORCESSE2: Valid only for the Intel Performance Primitives implementation + of this codec-- force IPP to use SSE2 code (bypass CPU auto-detection) + TJ_FORCESSE3: Valid only for the Intel Performance Primitives implementation + of this codec-- force IPP to use SSE3 code (bypass CPU auto-detection) + + RETURNS: 0 on success, -1 on error +*/ +DLLEXPORT int DLLCALL tjCompress(tjhandle j, + unsigned char *srcbuf, int width, int pitch, int height, int pixelsize, + unsigned char *dstbuf, unsigned long *size, + int jpegsubsamp, int jpegqual, int flags); + +DLLEXPORT unsigned long DLLCALL TJBUFSIZE(int width, int height); + +/* + tjhandle tjInitDecompress(void) + + Creates a new JPEG decompressor instance, allocates memory for the + structures, and returns a handle to the instance. Most applications will + only need to call this once at the beginning of the program or once for each + concurrent thread. Don't try to create a new instance every time you + decompress an image, because this will cause performance to suffer. + + RETURNS: NULL on error +*/ +DLLEXPORT tjhandle DLLCALL tjInitDecompress(void); + + +/* + int tjDecompressHeader(tjhandle j, + unsigned char *srcbuf, unsigned long size, + int *width, int *height) + + [INPUT] j = instance handle previously returned from a call to + tjInitDecompress() + [INPUT] srcbuf = pointer to a user-allocated buffer containing the JPEG image + to decompress + [INPUT] size = size of the JPEG image buffer (in bytes) + [OUTPUT] width = width (in pixels) of the JPEG image + [OUTPUT] height = height (in pixels) of the JPEG image + + RETURNS: 0 on success, -1 on error +*/ +DLLEXPORT int DLLCALL tjDecompressHeader(tjhandle j, + unsigned char *srcbuf, unsigned long size, + int *width, int *height); + + +/* + int tjDecompress(tjhandle j, + unsigned char *srcbuf, unsigned long size, + unsigned char *dstbuf, int width, int pitch, int height, int pixelsize, + int flags) + + [INPUT] j = instance handle previously returned from a call to + tjInitDecompress() + [INPUT] srcbuf = pointer to a user-allocated buffer containing the JPEG image + to decompress + [INPUT] size = size of the JPEG image buffer (in bytes) + [INPUT] dstbuf = pointer to user-allocated image buffer which will receive + the bitmap image. This buffer should normally be pitch*height + bytes in size, although this pointer may also be used to decompress into + a specific region of a larger buffer. + [INPUT] width = width (in pixels) of the destination image + [INPUT] pitch = bytes per line of the destination image (width*pixelsize if the + bitmap is unpadded, else TJPAD(width*pixelsize) if each line of the bitmap + is padded to the nearest 32-bit boundary, such as is the case for Windows + bitmaps. You can also be clever and use this parameter to skip lines, etc., + as long as the pitch is greater than 0.) + [INPUT] height = height (in pixels) of the destination image + [INPUT] pixelsize = size (in bytes) of each pixel in the destination image + RGBA/RGBx and BGRA/BGRx: 4, RGB and BGR: 3 + [INPUT] flags = the bitwise OR of one or more of the following + + TJ_BGR: The components of each pixel in the destination image should be + written in B,G,R order, not R,G,B + TJ_BOTTOMUP: The destination image should be stored in bottom-up + (Windows) order, not top-down + TJ_FORCEMMX: Valid only for the Intel Performance Primitives implementation + of this codec-- force IPP to use MMX code (bypass CPU auto-detection) + TJ_FORCESSE: Valid only for the Intel Performance Primitives implementation + of this codec-- force IPP to use SSE code (bypass CPU auto-detection) + TJ_FORCESSE2: Valid only for the Intel Performance Primitives implementation + of this codec-- force IPP to use SSE2 code (bypass CPU auto-detection) + + RETURNS: 0 on success, -1 on error +*/ +DLLEXPORT int DLLCALL tjDecompress(tjhandle j, + unsigned char *srcbuf, unsigned long size, + unsigned char *dstbuf, int width, int pitch, int height, int pixelsize, + int flags); + + +/* + int tjDestroy(tjhandle h) + + Frees structures associated with a compression or decompression instance + + [INPUT] h = instance handle (returned from a previous call to + tjInitCompress() or tjInitDecompress() + + RETURNS: 0 on success, -1 on error +*/ +DLLEXPORT int DLLCALL tjDestroy(tjhandle h); + + +/* + char *tjGetErrorStr(void) + + Returns a descriptive error message explaining why the last command failed +*/ +DLLEXPORT char* DLLCALL tjGetErrorStr(void); + +#ifdef __cplusplus +} +#endif |