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turbo-h264.c
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/*
* tight.c
*
* Routines to implement Tight Encoding
*/
/*
* Copyright (C) 2010-2012, 2014-2015 D. R. Commander. All Rights Reserved.
* Copyright (C) 2005-2008 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (C) 2004 Landmark Graphics Corporation. All Rights Reserved.
* Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved.
* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <errno.h>
#include <unistd.h>
#include <stdint.h>
#include "rfb.h"
#include "x264.h"
#include "turbojpeg.h"
#ifndef min
#define min(a,b) ((a)<(b)?(a):(b))
#endif
#define PAD(v, p) ((v+(p)-1)&(~((p)-1)))
static int enableLastRectEncoding = 1;
extern int decompress, ublen;
/* Note: The following constant should not be changed. */
#define TIGHT_MIN_TO_COMPRESS 12
/* The parameters below may be adjusted. */
#define MIN_SPLIT_RECT_SIZE 4096
#define MIN_SOLID_SUBRECT_SIZE 2048
#define MAX_SPLIT_TILE_SIZE 16
/* This variable is set on every rfbSendRectEncodingTight() call. */
static Bool usePixelFormat24;
/* Compression level stuff. The following array contains various
encoder parameters for each of 10 compression levels (0..9).
Last three parameters correspond to JPEG quality levels (0..9). */
typedef struct TIGHT_CONF_s {
int maxRectSize, maxRectWidth;
int monoMinRectSize;
int idxZlibLevel, monoZlibLevel, rawZlibLevel;
int idxMaxColorsDivisor;
int palMaxColorsWithJPEG;
} TIGHT_CONF;
static TIGHT_CONF tightConf[4] = {
{ 65536, 2048, 6, 0, 0, 0, 4, 24 }, // 0 (used only without JPEG)
{ 65536, 2048, 32, 1, 1, 1, 96, 24 }, // 1
{ 65536, 2048, 32, 3, 3, 2, 96, 96 }, // 2 (used only with JPEG)
{ 65536, 2048, 32, 7, 7, 5, 96, 256 } // 9
};
static int compressLevel = 1;
static int qualityLevel = 95;
static int subsampLevel = 0;
static const int subsampLevel2tjsubsamp[TVNC_SAMPOPT] = {
TJ_444, TJ_420, TJ_422, TJ_GRAYSCALE
};
/* Stuff dealing with palettes. */
typedef struct COLOR_LIST_s {
struct COLOR_LIST_s *next;
int idx;
CARD32 rgb;
} COLOR_LIST;
typedef struct PALETTE_ENTRY_s {
COLOR_LIST *listNode;
int numPixels;
} PALETTE_ENTRY;
typedef struct PALETTE_s {
PALETTE_ENTRY entry[256];
COLOR_LIST *hash[256];
COLOR_LIST list[256];
} PALETTE;
/* Globals for multi-threading */
#define TVNC_MAXTHREADS 8
static Bool threadInit = FALSE;
static int _nt;
static pthread_t thnd[TVNC_MAXTHREADS] = {0, 0, 0, 0, 0, 0, 0, 0};
typedef struct _threadparam {
rfbClientPtr cl;
int x, y, w, h, id, _ublen, *ublen;
char *tightBeforeBuf;
int tightBeforeBufSize;
char *tightAfterBuf;
int tightAfterBufSize;
char *updateBuf;
int updateBufSize;
int paletteNumColors, paletteMaxColors;
CARD32 monoBackground, monoForeground;
PALETTE palette;
tjhandle j;
int bytessent, rectsent;
int streamId, baseStreamId, nStreams;
pthread_mutex_t ready, done;
Bool status, deadyet;
unsigned long solidrect, solidpixels, monorect, monopixels, ndxrect,
ndxpixels, jpegrect, jpegpixels, fcrect, fcpixels;
} threadparam;
static threadparam tparam[TVNC_MAXTHREADS];
/* Prototypes for static functions. */
static void FindBestSolidArea (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 colorValue, int *w_ptr, int *h_ptr);
static void ExtendSolidArea (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 colorValue,
int *x_ptr, int *y_ptr, int *w_ptr, int *h_ptr);
static Bool CheckSolidTile (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 *colorPtr, Bool needSameColor);
static Bool CheckSolidTile8 (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 *colorPtr, Bool needSameColor);
static Bool CheckSolidTile16 (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 *colorPtr, Bool needSameColor);
static Bool CheckSolidTile32 (rfbClientPtr cl, int x, int y, int w, int h,
CARD32 *colorPtr, Bool needSameColor);
static Bool SendRectSimple (threadparam *t, int x, int y, int w, int h);
static Bool SendSubrect (threadparam *t, int x, int y, int w, int h);
static Bool SendTightHeader (threadparam *t, int x, int y, int w, int h);
static Bool SendSolidRect (threadparam *t);
static Bool SendMonoRect (threadparam *t, int w, int h);
static Bool SendIndexedRect (threadparam *t, int w, int h);
static Bool SendFullColorRect (threadparam *t, int w, int h);
static Bool CompressData (threadparam *t, int streamId, int dataLen,
int zlibLevel, int zlibStrategy);
static Bool SendCompressedData (threadparam *t, char *buf, int compressedLen);
static void FillPalette8 (threadparam *t, int count);
static void FillPalette16 (threadparam *t, int count);
static void FillPalette32 (threadparam *t, int count);
static void FastFillPalette16 (threadparam *t, CARD16 *data, int w, int pitch,
int h);
static void FastFillPalette32 (threadparam *t, CARD32 *data, int w, int pitch,
int h);
static void PaletteReset (threadparam *t);
static int PaletteInsert (threadparam *t, CARD32 rgb, int numPixels, int bpp);
static void Pack24 (char *buf, rfbPixelFormat *fmt, int count);
static void EncodeIndexedRect16(threadparam *t, CARD8 *buf, int count);
static void EncodeIndexedRect32(threadparam *t, CARD8 *buf, int count);
static void EncodeMonoRect8(threadparam *t, CARD8 *buf, int w, int h);
static void EncodeMonoRect16(threadparam *t, CARD8 *buf, int w, int h);
static void EncodeMonoRect32(threadparam *t, CARD8 *buf, int w, int h);
static Bool SendJpegRect(threadparam *t, int x, int y, int w, int h,
int quality);
static Bool SendRectEncodingTight(threadparam *t, int x, int y, int w, int h);
static void *TightThreadFunc(void *param);
static Bool CheckUpdateBuf(threadparam *t, int bytes);
static int nthreads(void);
unsigned long solidrect = 0, solidpixels = 0, monorect = 0, monopixels = 0,
ndxrect = 0, ndxpixels = 0, jpegrect = 0, jpegpixels = 0, fcrect = 0,
fcpixels = 0, gradrect = 0, gradpixels = 0;
/*
* Tight encoding implementation.
*/
int
rfbNumCodedRectsTight(cl, x, y, w, h)
rfbClientPtr cl;
int x, y, w, h;
{
int maxRectSize, maxRectWidth;
int subrectMaxWidth, subrectMaxHeight;
/* No matter how many rectangles we will send if LastRect markers
are used to terminate rectangle stream. */
if (enableLastRectEncoding && w * h >= MIN_SPLIT_RECT_SIZE)
return 0;
maxRectSize = tightConf[compressLevel].maxRectSize;
maxRectWidth = tightConf[compressLevel].maxRectWidth;
if (w > maxRectWidth || w * h > maxRectSize) {
subrectMaxWidth = (w > maxRectWidth) ? maxRectWidth : w;
subrectMaxHeight = maxRectSize / subrectMaxWidth;
return (((w - 1) / maxRectWidth + 1) *
((h - 1) / subrectMaxHeight + 1));
} else {
return 1;
}
}
static int
nthreads(void)
{
char *mtenv = getenv("TVNC_MT");
char *ntenv = getenv("TVNC_NTHREADS");
int np = sysconf(_SC_NPROCESSORS_CONF), nt = 0;
if (!mtenv || strlen(mtenv) < 1 || strcmp(mtenv, "1"))
return 1;
if (np == -1) np = 1;
np = min(np, TVNC_MAXTHREADS);
if (ntenv && strlen(ntenv) > 0) nt = atoi(ntenv);
if (nt >= 1 && nt <= np) return nt;
else return np;
}
static void
InitThreads(void)
{
int err = 0, i;
if (threadInit) return;
_nt = nthreads();
memset(tparam, 0, sizeof(threadparam) * TVNC_MAXTHREADS);
tparam[0].ublen = &ublen;
tparam[0].updateBuf = updateBuf;
for (i = 1; i < TVNC_MAXTHREADS; i++) {
tparam[i].ublen = &tparam[i]._ublen;
tparam[i].id = i;
}
rfbLog("Using %d thread%s for Tight encoding\n", _nt,
_nt == 1 ? "" : "s");
if (_nt > 1) {
for (i = 1; i < _nt; i++) {
if (!tparam[i].updateBuf) {
tparam[i].updateBufSize = UPDATE_BUF_SIZE;
tparam[i].updateBuf = (char *)malloc(tparam[i].updateBufSize);
}
pthread_mutex_init(&tparam[i].ready, NULL);
pthread_mutex_lock(&tparam[i].ready);
pthread_mutex_init(&tparam[i].done, NULL);
pthread_mutex_lock(&tparam[i].done);
if ((err = pthread_create(&thnd[i], NULL, TightThreadFunc,
&tparam[i])) != 0) {
rfbLog ("Could not start thread %d: %s\n", i + 1,
strerror(err == -1 ? errno : err));
return;
}
}
}
threadInit = TRUE;
}
void
ShutdownTightThreads(void)
{
int i;
if (!threadInit) return;
if (_nt > 1) {
for (i = 1; i < _nt; i++) {
if (thnd[i]) {
tparam[i].deadyet = TRUE;
pthread_mutex_unlock(&tparam[i].ready);
pthread_join(thnd[i], NULL);
thnd[i] = 0;
pthread_mutex_destroy(&tparam[i].ready);
pthread_mutex_destroy(&tparam[i].done);
}
}
}
for (i = 0; i < _nt; i++) {
if (tparam[i].tightAfterBuf) free(tparam[i].tightAfterBuf);
if (tparam[i].tightBeforeBuf) free(tparam[i].tightBeforeBuf);
if (i != 0 && tparam[i].updateBuf) free(tparam[i].updateBuf);
if (tparam[i].j) tjDestroy(tparam[i].j);
memset(&tparam[i], 0, sizeof(threadparam));
}
threadInit = FALSE;
}
static void *
TightThreadFunc(param)
void *param;
{
threadparam *t = (threadparam *)param;
while (!t->deadyet) {
pthread_mutex_lock(&t->ready);
if (t->deadyet) break;
t->status = SendRectEncodingTight(t, t->x, t->y, t->w, t->h);
pthread_mutex_unlock(&t->done);
}
return NULL;
}
static Bool
CheckUpdateBuf(t, bytes)
threadparam *t;
int bytes;
{
rfbClientPtr cl = t->cl;
if (t->id == 0) {
if (ublen + bytes > UPDATE_BUF_SIZE) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
}
else {
if ((*t->ublen) + bytes > t->updateBufSize) {
t->updateBufSize += UPDATE_BUF_SIZE;
t->updateBuf = (char *)realloc(t->updateBuf, t->updateBufSize);
}
}
return TRUE;
}
Bool
rfbSendRectEncodingTight(cl, x, y, w, h)
rfbClientPtr cl;
int x, y, w, h;
{
Bool status = TRUE;
int i, nt;
if (!threadInit) {
InitThreads();
if (!threadInit) return FALSE;
}
/* CL 9 (which maps internally to CL 3) is included mainly for backward
compatibility with TightVNC Compression Levels 5-9. It should be used
only in extremely low-bandwidth cases in which it can be shown to have a
benefit. For low-color workloads, it provides typically only 10-20%
better compression than CL 2 with JPEG and CL 1 without JPEG, and it
uses, on average, twice as much CPU time. */
if (compressLevel > 3) compressLevel = 3;
/* We only allow compression levels that have a demonstrable performance
benefit. CL 0 with JPEG reduces CPU usage for workloads that have low
numbers of unique colors, but the same thing can be accomplished by
using CL 0 without JPEG (AKA "Lossless Tight.") For those same
low-color workloads, CL 2 can provide typically 20-40% better
compression than CL 1 (with a commensurate increase in CPU usage.) For
high-color workloads, CL 1 should always be used, as higher compression
levels increase CPU usage for these workloads without providing any
significant reduction in bandwidth. */
if (qualityLevel != -1) {
if (compressLevel < 1) compressLevel = 1;
}
/* With JPEG disabled, CL 2 offers no significant bandwidth savings over
CL 1, so we don't include it. */
else if (compressLevel == 2) compressLevel = 1;
if (cl->format.depth == 24 && cl->format.redMax == 0xFF &&
cl->format.greenMax == 0xFF && cl->format.blueMax == 0xFF) {
usePixelFormat24 = TRUE;
} else {
usePixelFormat24 = FALSE;
}
nt = min(_nt, w * h / tightConf[compressLevel].maxRectSize);
if (nt < 1) nt = 1;
for (i = 0; i < nt; i++) {
tparam[i].status = TRUE;
tparam[i].cl = cl;
tparam[i].x = x;
tparam[i].y = h / nt * i + y;
tparam[i].w = w;
tparam[i].h = (i == nt - 1) ? (h - (h / nt * i)) : h / nt;
tparam[i].bytessent = tparam[i].rectsent = 0;
if (i < 4) {
int n = min(nt, 4);
tparam[i].baseStreamId = 4 / n * i;
if (i == n - 1) tparam[i].nStreams = 4 - tparam[i].baseStreamId;
else tparam[i].nStreams = 4 / n;
tparam[i].streamId = tparam[i].baseStreamId;
}
tparam[i].solidrect = tparam[i].solidpixels = 0;
tparam[i].monorect = tparam[i].monopixels = 0;
tparam[i].ndxrect = tparam[i].ndxpixels = 0;
tparam[i].jpegrect = tparam[i].jpegpixels = 0;
tparam[i].fcrect = tparam[i].fcpixels = 0;
}
if (nt > 1) {
for (i = 1; i < nt; i++) pthread_mutex_unlock(&tparam[i].ready);
}
status &= SendRectEncodingTight(&tparam[0], tparam[0].x, tparam[0].y,
tparam[0].w, tparam[0].h);
if (!status) return FALSE;
cl->rfbBytesSent[rfbEncodingTight] += tparam[0].bytessent;
cl->rfbRectanglesSent[rfbEncodingTight] += tparam[0].rectsent;
if (nt > 1) {
for (i = 1; i < nt; i++) {
pthread_mutex_lock (&tparam[i].done);
status &= tparam[i].status;
}
if (status == FALSE) return FALSE;
if (ublen > 0) {
if (!rfbSendUpdateBuf(cl)) {
return FALSE;
}
}
for (i = 1; i < nt; i++) {
if ((*tparam[i].ublen) > 0 && decompress) {
if ((*tparam[i].ublen) + sblen > SEND_BUF_SIZE) {
rfbLog("ERROR: Send buffer overrun.\n");
return FALSE;
}
memcpy(&sendBuf[sblen], tparam[i].updateBuf, *tparam[i].ublen);
sblen += (*tparam[i].ublen);
}
(*tparam[i].ublen) = 0;
cl->rfbBytesSent[rfbEncodingTight] += tparam[i].bytessent;
cl->rfbRectanglesSent[rfbEncodingTight] += tparam[i].rectsent;
}
}
for (i = 0; i < nt; i++) {
solidrect += tparam[i].solidrect;
solidpixels += tparam[i].solidpixels;
monorect += tparam[i].monorect;
monopixels += tparam[i].monopixels;
ndxrect += tparam[i].ndxrect;
ndxpixels += tparam[i].ndxpixels;
jpegrect += tparam[i].jpegrect;
jpegpixels += tparam[i].jpegpixels;
fcrect += tparam[i].fcrect;
fcpixels += tparam[i].fcpixels;
}
return status;
}
static Bool
SendRectEncodingTight(t, x, y, w, h)
threadparam *t;
int x, y, w, h;
{
int nMaxRows;
CARD32 colorValue;
int dx, dy, dw, dh;
int x_best, y_best, w_best, h_best;
char *fbptr;
rfbClientPtr cl = t->cl;
if (!enableLastRectEncoding || w * h < MIN_SPLIT_RECT_SIZE)
return SendRectSimple(t, x, y, w, h);
/* Make sure we can write at least one pixel into tightBeforeBuf. */
if (t->tightBeforeBufSize < 4) {
t->tightBeforeBufSize = 4;
if (t->tightBeforeBuf == NULL)
t->tightBeforeBuf = (char *)malloc(t->tightBeforeBufSize);
else
t->tightBeforeBuf = (char *)realloc(t->tightBeforeBuf,
t->tightBeforeBufSize);
}
/* Calculate maximum number of rows in one non-solid rectangle. */
{
int maxRectSize, maxRectWidth, nMaxWidth;
maxRectSize = tightConf[compressLevel].maxRectSize;
maxRectWidth = tightConf[compressLevel].maxRectWidth;
nMaxWidth = (w > maxRectWidth) ? maxRectWidth : w;
nMaxRows = maxRectSize / nMaxWidth;
}
/* Try to find large solid-color areas and send them separately. */
for (dy = y; dy < y + h; dy += MAX_SPLIT_TILE_SIZE) {
/* If a rectangle becomes too large, send its upper part now. */
if (dy - y >= nMaxRows) {
if (!SendRectSimple(t, x, y, w, nMaxRows))
return 0;
y += nMaxRows;
h -= nMaxRows;
}
dh = (dy + MAX_SPLIT_TILE_SIZE <= y + h) ?
MAX_SPLIT_TILE_SIZE : (y + h - dy);
for (dx = x; dx < x + w; dx += MAX_SPLIT_TILE_SIZE) {
dw = (dx + MAX_SPLIT_TILE_SIZE <= x + w) ?
MAX_SPLIT_TILE_SIZE : (x + w - dx);
if (CheckSolidTile(cl, dx, dy, dw, dh, &colorValue, FALSE)) {
if (subsampLevel == TJ_GRAYSCALE && qualityLevel != -1) {
CARD32 r = (colorValue >> 16) & 0xFF;
CARD32 g = (colorValue >> 8) & 0xFF;
CARD32 b = (colorValue) & 0xFF;
double y = (0.257 * (double)r) + (0.504 * (double)g)
+ (0.098 * (double)b) + 16.;
colorValue = (int)y + (((int)y) << 8) + (((int)y) << 16);
}
/* Get dimensions of solid-color area. */
FindBestSolidArea(cl, dx, dy, w - (dx - x), h - (dy - y),
colorValue, &w_best, &h_best);
/* Make sure a solid rectangle is large enough
(or the whole rectangle is of the same color). */
if (w_best * h_best != w * h &&
w_best * h_best < MIN_SOLID_SUBRECT_SIZE)
continue;
/* Try to extend solid rectangle to maximum size. */
x_best = dx; y_best = dy;
ExtendSolidArea(cl, x, y, w, h, colorValue,
&x_best, &y_best, &w_best, &h_best);
/* Send rectangles at top and left to solid-color area. */
if (y_best != y &&
!SendRectSimple(t, x, y, w, y_best - y))
return FALSE;
if (x_best != x &&
!SendRectEncodingTight(t, x, y_best,
x_best - x, h_best))
return FALSE;
/* Send solid-color rectangle. */
if (!SendTightHeader(t, x_best, y_best, w_best, h_best))
return FALSE;
fbptr = (cl->fb +
(rfbScreen.paddedWidthInBytes * y_best) +
(x_best * (rfbScreen.bitsPerPixel / 8)));
(*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat,
&cl->format, fbptr, t->tightBeforeBuf,
rfbScreen.paddedWidthInBytes, 1, 1);
t->solidrect++; t->solidpixels += w_best * h_best;
if (!SendSolidRect(t))
return FALSE;
/* Send remaining rectangles (at right and bottom). */
if (x_best + w_best != x + w &&
!SendRectEncodingTight(t, x_best + w_best, y_best,
w - (x_best - x) - w_best, h_best))
return FALSE;
if (y_best + h_best != y + h &&
!SendRectEncodingTight(t, x, y_best + h_best,
w, h - (y_best - y) - h_best))
return FALSE;
/* Return after all recursive calls are done. */
return TRUE;
}
}
}
/* No suitable solid-color rectangles found. */
return SendRectSimple(t, x, y, w, h);
}
static void
FindBestSolidArea(cl, x, y, w, h, colorValue, w_ptr, h_ptr)
rfbClientPtr cl;
int x, y, w, h;
CARD32 colorValue;
int *w_ptr, *h_ptr;
{
int dx, dy, dw, dh;
int w_prev;
int w_best = 0, h_best = 0;
w_prev = w;
for (dy = y; dy < y + h; dy += MAX_SPLIT_TILE_SIZE) {
dh = (dy + MAX_SPLIT_TILE_SIZE <= y + h) ?
MAX_SPLIT_TILE_SIZE : (y + h - dy);
dw = (w_prev > MAX_SPLIT_TILE_SIZE) ?
MAX_SPLIT_TILE_SIZE : w_prev;
if (!CheckSolidTile(cl, x, dy, dw, dh, &colorValue, TRUE))
break;
for (dx = x + dw; dx < x + w_prev;) {
dw = (dx + MAX_SPLIT_TILE_SIZE <= x + w_prev) ?
MAX_SPLIT_TILE_SIZE : (x + w_prev - dx);
if (!CheckSolidTile(cl, dx, dy, dw, dh, &colorValue, TRUE))
break;
dx += dw;
}
w_prev = dx - x;
if (w_prev * (dy + dh - y) > w_best * h_best) {
w_best = w_prev;
h_best = dy + dh - y;
}
}
*w_ptr = w_best;
*h_ptr = h_best;
}
static void
ExtendSolidArea(cl, x, y, w, h, colorValue, x_ptr, y_ptr, w_ptr, h_ptr)
rfbClientPtr cl;
int x, y, w, h;
CARD32 colorValue;
int *x_ptr, *y_ptr, *w_ptr, *h_ptr;
{
int cx, cy;
/* Try to extend the area upwards. */
for (cy = *y_ptr - 1;
cy >= y && CheckSolidTile(cl, *x_ptr, cy, *w_ptr, 1, &colorValue,
TRUE);
cy--);
*h_ptr += *y_ptr - (cy + 1);
*y_ptr = cy + 1;
/* ... downwards. */
for (cy = *y_ptr + *h_ptr;
cy < y + h &&
CheckSolidTile(cl, *x_ptr, cy, *w_ptr, 1, &colorValue, TRUE);
cy++);
*h_ptr += cy - (*y_ptr + *h_ptr);
/* ... to the left. */
for (cx = *x_ptr - 1;
cx >= x && CheckSolidTile(cl, cx, *y_ptr, 1, *h_ptr, &colorValue,
TRUE);
cx--);
*w_ptr += *x_ptr - (cx + 1);
*x_ptr = cx + 1;
/* ... to the right. */
for (cx = *x_ptr + *w_ptr;
cx < x + w &&
CheckSolidTile(cl, cx, *y_ptr, 1, *h_ptr, &colorValue, TRUE);
cx++);
*w_ptr += cx - (*x_ptr + *w_ptr);
}
/*
* Check if a rectangle is all of the same color. If needSameColor is
* set to non-zero, then also check that its color equals to the
* *colorPtr value. The result is 1 if the test is successfull, and in
* that case new color will be stored in *colorPtr.
*/
static Bool
CheckSolidTile(cl, x, y, w, h, colorPtr, needSameColor)
rfbClientPtr cl;
int x, y, w, h;
CARD32 *colorPtr;
Bool needSameColor;
{
switch(rfbServerFormat.bitsPerPixel) {
case 32:
return CheckSolidTile32(cl, x, y, w, h, colorPtr, needSameColor);
case 16:
return CheckSolidTile16(cl, x, y, w, h, colorPtr, needSameColor);
default:
return CheckSolidTile8(cl, x, y, w, h, colorPtr, needSameColor);
}
}
#define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
\
static Bool \
CheckSolidTile##bpp(cl, x, y, w, h, colorPtr, needSameColor) \
rfbClientPtr cl; \
int x, y, w, h; \
CARD32 *colorPtr; \
Bool needSameColor; \
{ \
CARD##bpp *fbptr; \
CARD##bpp colorValue; \
int dx, dy; \
\
fbptr = (CARD##bpp *) \
&cl->fb[y * rfbScreen.paddedWidthInBytes + x * (bpp/8)]; \
\
colorValue = *fbptr; \
if (needSameColor && (CARD32)colorValue != *colorPtr) \
return FALSE; \
\
for (dy = 0; dy < h; dy++) { \
for (dx = 0; dx < w; dx++) { \
if (colorValue != fbptr[dx]) \
return FALSE; \
} \
fbptr = (CARD##bpp *)((CARD8 *)fbptr + rfbScreen.paddedWidthInBytes); \
} \
\
*colorPtr = (CARD32)colorValue; \
return TRUE; \
}
DEFINE_CHECK_SOLID_FUNCTION(8)
DEFINE_CHECK_SOLID_FUNCTION(16)
DEFINE_CHECK_SOLID_FUNCTION(32)
static Bool
SendRectSimple(t, x, y, w, h)
threadparam *t;
int x, y, w, h;
{
int maxBeforeSize, maxAfterSize;
int maxRectSize, maxRectWidth;
int subrectMaxWidth, subrectMaxHeight;
int dx, dy;
int rw, rh;
rfbClientPtr cl = t->cl;
maxRectSize = tightConf[compressLevel].maxRectSize;
maxRectWidth = tightConf[compressLevel].maxRectWidth;
maxBeforeSize = maxRectSize * (cl->format.bitsPerPixel / 8);
maxAfterSize = maxBeforeSize + (maxBeforeSize + 99) / 100 + 12;
if (t->tightBeforeBufSize < maxBeforeSize) {
t->tightBeforeBufSize = maxBeforeSize;
if (t->tightBeforeBuf == NULL)
t->tightBeforeBuf = (char *)malloc(t->tightBeforeBufSize);
else
t->tightBeforeBuf = (char *)realloc(t->tightBeforeBuf,
t->tightBeforeBufSize);
}
if (t->tightAfterBufSize < maxAfterSize) {
t->tightAfterBufSize = maxAfterSize;
if (t->tightAfterBuf == NULL)
t->tightAfterBuf = (char *)malloc(t->tightAfterBufSize);
else
t->tightAfterBuf = (char *)realloc(t->tightAfterBuf,
t->tightAfterBufSize);
}
if (w > maxRectWidth || w * h > maxRectSize) {
subrectMaxWidth = (w > maxRectWidth) ? maxRectWidth : w;
subrectMaxHeight = maxRectSize / subrectMaxWidth;
for (dy = 0; dy < h; dy += subrectMaxHeight) {
for (dx = 0; dx < w; dx += maxRectWidth) {
rw = (dx + maxRectWidth < w) ? maxRectWidth : w - dx;
rh = (dy + subrectMaxHeight < h) ? subrectMaxHeight : h - dy;
if (!SendSubrect(t, x + dx, y + dy, rw, rh))
return FALSE;
}
}
} else {
if (!SendSubrect(t, x, y, w, h))
return FALSE;
}
return TRUE;
}
static Bool
SendSubrect(t, x, y, w, h)
threadparam *t;
int x, y, w, h;
{
char *fbptr;
Bool success = FALSE;
rfbClientPtr cl = t->cl;
/* Send pending data if there is more than 128 bytes. */
if (t->id == 0) {
if (ublen > 128) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
}
if (x % 2 != 0) { x--; w++; }
if (y % 2 != 0) { y--; h++; }
if (w % 2 != 0) w++;
if (h % 2 != 0) h++;
if (!SendTightHeader(t, x, y, w, h))
return FALSE;
fbptr = (cl->fb + (rfbScreen.paddedWidthInBytes * y)
+ (x * (rfbScreen.bitsPerPixel / 8)));
if (subsampLevel == TJ_GRAYSCALE && qualityLevel != -1 &&
rfbScreen.bitsPerPixel > 8)
return SendJpegRect(t, x, y, w, h, qualityLevel);
t->paletteMaxColors = w * h / tightConf[compressLevel].idxMaxColorsDivisor;
if (qualityLevel != -1)
t->paletteMaxColors = tightConf[compressLevel].palMaxColorsWithJPEG;
if (t->paletteMaxColors < 2 &&
w * h >= tightConf[compressLevel].monoMinRectSize) {
t->paletteMaxColors = 2;
}
if (cl->format.bitsPerPixel == rfbServerFormat.bitsPerPixel &&
cl->format.redMax == rfbServerFormat.redMax &&
cl->format.greenMax == rfbServerFormat.greenMax &&
cl->format.blueMax == rfbServerFormat.blueMax &&
cl->format.bitsPerPixel >= 16) {
/* This is so we can avoid translating the pixels when compressing
with JPEG, since it is unnecessary */
switch (cl->format.bitsPerPixel) {
case 16:
FastFillPalette16(t, (CARD16 *)fbptr, w,
rfbScreen.paddedWidthInBytes/2, h);
break;
default:
FastFillPalette32(t, (CARD32 *)fbptr, w,
rfbScreen.paddedWidthInBytes/4, h);
}
if (t->paletteNumColors != 0 || qualityLevel == -1) {
(*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat,
&cl->format, fbptr, t->tightBeforeBuf,
rfbScreen.paddedWidthInBytes, w, h);
}
}
else {
(*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat,
&cl->format, fbptr, t->tightBeforeBuf,
rfbScreen.paddedWidthInBytes, w, h);
switch (cl->format.bitsPerPixel) {
case 8:
FillPalette8(t, w * h);
break;
case 16:
FillPalette16(t, w * h);
break;
default:
FillPalette32(t, w * h);
}
}
switch (t->paletteNumColors) {
case 0:
/* Truecolor image */
if (qualityLevel != -1) {
success = SendJpegRect(t, x, y, w, h, qualityLevel);
} else {
success = SendFullColorRect(t, w, h);
}
break;
case 1:
/* Solid rectangle */
t->solidrect++; t->solidpixels += w*h;
success = SendSolidRect(t);
break;
case 2:
/* Two-color rectangle */
success = SendMonoRect(t, w, h);
break;
default:
/* Up to 256 different colors */
success = SendIndexedRect(t, w, h);
}
return success;
}
static Bool
SendTightHeader(t, x, y, w, h)
threadparam *t;
int x, y, w, h;
{
rfbFramebufferUpdateRectHeader rect;
if (!CheckUpdateBuf(t, sz_rfbFramebufferUpdateRectHeader))
return FALSE;
rect.r.x = Swap16IfLE(x);
rect.r.y = Swap16IfLE(y);
rect.r.w = Swap16IfLE(w);
rect.r.h = Swap16IfLE(h);
rect.encoding = Swap32IfLE(rfbEncodingTight);
memcpy(&t->updateBuf[*t->ublen], (char *)&rect,
sz_rfbFramebufferUpdateRectHeader);
(*t->ublen) += sz_rfbFramebufferUpdateRectHeader;
t->rectsent++;
t->bytessent += sz_rfbFramebufferUpdateRectHeader;
return TRUE;
}
/*
* Subencoding implementations.
*/
static Bool
SendSolidRect(t)
threadparam *t;
{
int len;
rfbClientPtr cl = t->cl;
if (usePixelFormat24) {
Pack24(t->tightBeforeBuf, &cl->format, 1);
len = 3;
} else
len = cl->format.bitsPerPixel / 8;
if (!CheckUpdateBuf(t, 1 + len))
return FALSE;
t->updateBuf[(*t->ublen)++] = (char)(rfbTightFill << 4);
memcpy(&t->updateBuf[*t->ublen], t->tightBeforeBuf, len);
(*t->ublen) += len;
t->bytessent += len + 1;
return TRUE;
}
static Bool
SendMonoRect(t, w, h)
threadparam *t;
int w, h;
{
int streamId = t->streamId;
int paletteLen, dataLen;
rfbClientPtr cl = t->cl;
t->monorect++; t->monopixels += w*h;
if (!CheckUpdateBuf(t, TIGHT_MIN_TO_COMPRESS + 6 +
2 * cl->format.bitsPerPixel / 8))
return FALSE;
if (t->nStreams > 0) {
t->streamId++;
if (t->streamId >= t->baseStreamId + t->nStreams)
t->streamId = t->baseStreamId;