4 * Copyright (C) 2009 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include "bcresources.h"
25 #include "bcsignals.h"
27 #include "bccmodels.h"
32 #include <X11/extensions/Xvlib.h>
34 int BC_Bitmap::max_active_buffers = 0;
35 int BC_Bitmap::zombies = 0;
38 BC_BitmapImage::BC_BitmapImage(BC_Bitmap *bitmap, int index)
41 this->bitmap = bitmap;
42 this->top_level = bitmap->top_level;
47 this->bytesPerLine = 0;
48 this->bitsPerPixel = 0;
51 BC_BitmapImage::~BC_BitmapImage()
57 bool BC_BitmapImage::is_avail()
59 return list == &bitmap->avail;
62 BC_BitmapImage *BC_Bitmap::cur_bfr()
65 avail_lock->lock("BC_Bitmap::cur_bfr 1");
66 if( (!use_shm || top_level->is_running()) &&
67 (active_bfr=avail.first) != 0 )
68 avail.remove_pointer(active_bfr);
70 update_buffers(buffer_count+1, 0);
71 if( (active_bfr=avail.first) != 0 )
72 avail.remove_pointer(active_bfr);
74 active_bfr = new_buffer(type, -1);
82 read_frame_rgb(VFrame *frame)
84 int w = bitmap->w, h = bitmap->h;
85 if( frame->get_w() != w || frame->get_h() != h ||
86 frame->get_color_model() != BC_RGB888 )
87 frame->reallocate(0, 0, 0, 0, 0, w, h, BC_RGB888, -1);
88 uint8_t *dp = frame->get_data();
89 int rmask = ximage->red_mask;
90 int gmask = ximage->green_mask;
91 int bmask = ximage->blue_mask;
92 //due to a bug in the xserver, the mask is being cleared by XShm.C:402
93 // when a faulty data in a XShmGetImage reply returns a zero visual
94 //workaround, use the original visual for the mask data
95 if ( !rmask ) rmask = bitmap->top_level->vis->red_mask;
96 if ( !gmask ) gmask = bitmap->top_level->vis->green_mask;
97 if ( !bmask ) bmask = bitmap->top_level->vis->blue_mask;
98 double fr = 255.0 / rmask;
99 double fg = 255.0 / gmask;
100 double fb = 255.0 / bmask;
101 int nbyte = (ximage->bits_per_pixel+7)/8;
102 int b0 = ximage->byte_order == MSBFirst ? 0 : nbyte-1;
103 int bi = ximage->byte_order == MSBFirst ? 1 : -1;
104 uint8_t *data = (uint8_t *)ximage->data;
106 for( int y=0; y<h; ++y ) {
107 uint8_t *cp = data + y*ximage->bytes_per_line + b0;
108 for( int x=0; x<w; ++x, cp+=nbyte ) {
109 uint8_t *bp = cp; uint32_t n = *bp;
110 for( int i=nbyte; --i>0; n=(n<<8)|*bp ) bp += bi;
111 *dp++ = (int)((n&rmask)*fr + 0.5);
112 *dp++ = (int)((n&gmask)*fg + 0.5);
113 *dp++ = (int)((n&bmask)*fb + 0.5);
119 void BC_Bitmap::reque(BC_BitmapImage *bfr)
121 avail_lock->lock("BC_Bitmap::reque");
124 avail_lock->unlock();
127 BC_XvShmImage::BC_XvShmImage(BC_Bitmap *bitmap, int index,
128 int w, int h, int color_model)
129 : BC_BitmapImage(bitmap, index)
131 Display *display = top_level->get_display();
132 int id = BC_CModels::bc_to_x(color_model);
133 // Create the XvImage
134 xv_image = XvShmCreateImage(display, bitmap->xv_portid, id,
136 dataSize = xv_image->data_size;
137 // Create the shared memory
138 shm_info.shmid = shmget(IPC_PRIVATE,
139 dataSize + 8, IPC_CREAT | 0777);
140 if(shm_info.shmid < 0)
141 perror("BC_XvShmImage::BC_XvShmImage shmget");
142 data = (unsigned char *)shmat(shm_info.shmid, NULL, 0);
143 // This causes it to automatically delete when the program exits.
144 shmctl(shm_info.shmid, IPC_RMID, 0);
145 // setting ximage->data stops BadValue
146 xv_image->data = shm_info.shmaddr = (char*)data;
147 shm_info.readOnly = 0;
148 // Get the real parameters
150 h = xv_image->height;
151 if(!XShmAttach(top_level->display, &shm_info))
152 perror("BC_XvShmImage::BC_XvShmImage XShmAttach");
153 if( color_model == BC_YUV422 || color_model == BC_UVY422 ) {
156 row_data = new unsigned char*[h];
157 for( int i=0; i<h; ++i )
158 row_data[i] = &data[i*bytesPerLine];
162 BC_XvShmImage::~BC_XvShmImage()
166 XShmDetach(top_level->display, &shm_info);
167 shmdt(shm_info.shmaddr);
171 BC_XShmImage::BC_XShmImage(BC_Bitmap *bitmap, int index,
172 int w, int h, int color_model)
173 : BC_BitmapImage(bitmap, index)
175 Display *display = top_level->display;
176 Visual *visual = top_level->vis;
177 int default_depth = bitmap->get_default_depth();
178 ximage = XShmCreateImage(display, visual,
179 default_depth, default_depth == 1 ? XYBitmap : ZPixmap,
180 (char*)NULL, &shm_info, w, h);
181 // Create shared memory
182 bytesPerLine = ximage->bytes_per_line;
183 bitsPerPixel = ximage->bits_per_pixel;
184 dataSize = h * bytesPerLine;
185 shm_info.shmid = shmget(IPC_PRIVATE,
186 dataSize + 8, IPC_CREAT | 0777);
187 if(shm_info.shmid < 0)
188 perror("BC_XShmImage::BC_XShmImage shmget");
189 data = (unsigned char *)shmat(shm_info.shmid, NULL, 0);
190 // This causes it to automatically delete when the program exits.
191 shmctl(shm_info.shmid, IPC_RMID, 0);
192 ximage->data = shm_info.shmaddr = (char*)data;
193 shm_info.readOnly = 0;
194 // Get the real parameters
195 if(!XShmAttach(top_level->display, &shm_info))
196 perror("BC_XShmImage::BC_XShmImage XShmAttach");
197 row_data = new unsigned char*[h];
198 for( int i=0; i<h; ++i )
199 row_data[i] = &data[i*bytesPerLine];
202 BC_XShmImage::~BC_XShmImage()
206 XDestroyImage(ximage);
207 XShmDetach(top_level->display, &shm_info);
208 XFlush(top_level->display);
209 shmdt(shm_info.shmaddr);
214 BC_XvImage::BC_XvImage(BC_Bitmap *bitmap, int index,
215 int w, int h, int color_model)
216 : BC_BitmapImage(bitmap, index)
218 Display *display = top_level->display;
219 int id = BC_CModels::bc_to_x(color_model);
220 xv_image = XvCreateImage(display, bitmap->xv_portid, id, 0, w, h);
221 dataSize = xv_image->data_size;
222 long data_sz = dataSize + 8;
223 data = new unsigned char[data_sz];
224 memset(data, 0, data_sz);
225 xv_image->data = (char *) data;
227 h = xv_image->height;
228 if( color_model == BC_YUV422 || color_model == BC_UVY422 ) {
229 int bytesPerLine = w*2;
230 row_data = new unsigned char*[h];
231 for( int i=0; i<h; ++i )
232 row_data[i] = &data[i*bytesPerLine];
236 BC_XvImage::~BC_XvImage()
242 BC_XImage::BC_XImage(BC_Bitmap *bitmap, int index,
243 int w, int h, int color_model)
244 : BC_BitmapImage(bitmap, index)
246 Display *display = top_level->display;
247 Visual *visual = top_level->vis;
248 int default_depth = bitmap->get_default_depth();
249 ximage = XCreateImage(display, visual, default_depth,
250 default_depth == 1 ? XYBitmap : ZPixmap,
251 0, (char*)data, w, h, 8, 0);
252 bytesPerLine = ximage->bytes_per_line;
253 bitsPerPixel = ximage->bits_per_pixel;
254 dataSize = h * bytesPerLine;
255 long data_sz = dataSize + 8;
256 data = new unsigned char[data_sz];
257 memset(data, 0, data_sz);
258 ximage->data = (char*) data;
259 row_data = new unsigned char*[h];
260 for( int i=0; i<h; ++i )
261 row_data[i] = &data[i*bytesPerLine];
264 BC_XImage::~BC_XImage()
269 XDestroyImage(ximage);
273 BC_Bitmap::BC_Bitmap(BC_WindowBase *parent_window, unsigned char *png_data, double scale)
275 // Decompress data into a temporary vframe
276 VFramePng frame(png_data, scale);
279 // Initialize the bitmap
280 initialize(parent_window,
283 parent_window->get_color_model(),
286 // Copy the vframe to the bitmap
287 read_frame(&frame, 0, 0, w, h);
290 BC_Bitmap::BC_Bitmap(BC_WindowBase *parent_window, VFrame *frame)
293 // Initialize the bitmap
294 initialize(parent_window,
297 parent_window->get_color_model(),
300 // Copy the vframe to the bitmap
301 read_frame(frame, 0, 0, w, h);
304 BC_Bitmap::BC_Bitmap(BC_WindowBase *parent_window,
305 int w, int h, int color_model, int use_shm)
308 initialize(parent_window, w, h, color_model, use_shm);
311 BC_Bitmap::~BC_Bitmap()
317 int BC_Bitmap::initialize(BC_WindowBase *parent_window,
318 int w, int h, int color_model, int use_shm)
320 BC_Resources *resources = parent_window->get_resources();
321 this->parent_window = parent_window;
322 this->top_level = parent_window->top_level;
323 this->xv_portid = resources->use_xvideo ? top_level->xvideo_port_id : -1;
328 this->color_model = color_model;
329 this->use_shm = !use_shm ? 0 : need_shm();
330 this->shm_reply = this->use_shm && resources->shm_reply ? 1 : 0;
331 // dont use shm for less than one page
332 this->bg_color = parent_window->bg_color;
333 if( !this->avail_lock )
334 this->avail_lock = new Mutex("BC_Bitmap::avail_lock");
336 this->avail_lock->reset();
339 this->active_bfr = 0;
340 this->buffer_count = 0;
341 this->max_buffer_count = 0;
342 this->active_buffers = 0;
347 int BC_Bitmap::match_params(int w, int h, int color_model, int use_shm)
349 if( use_shm ) use_shm = need_shm();
350 if(this->w /* != */ < w || this->h /* != */ < h ||
351 this->color_model != color_model || this->use_shm != use_shm) {
353 initialize(parent_window, w, h, color_model, use_shm);
359 int BC_Bitmap::params_match(int w, int h, int color_model, int use_shm)
362 if( use_shm ) use_shm = need_shm();
363 if(this->w == w && this->h == h && this->color_model == color_model) {
364 if(use_shm == this->use_shm || use_shm == BC_INFINITY)
370 BC_BitmapImage *BC_Bitmap::new_buffer(int type, int idx)
372 BC_BitmapImage *buffer = 0;
374 if( type == bmXShmImage ) type = bmXImage;
375 else if( type == bmXvShmImage ) type = bmXvImage;
380 buffer = new BC_XImage(this, idx, w, h, color_model);
383 buffer = new BC_XvImage(this, idx, w, h, color_model);
386 buffer = new BC_XShmImage(this, idx, w, h, color_model);
389 buffer = new BC_XvShmImage(this, idx, w, h, color_model);
392 if( buffer->is_zombie() ) ++zombies;
397 update_buffers(int count, int lock_avail)
400 // can deadlock in XReply (libxcb bug) without this lock
401 //top_level->lock_window("BC_Bitmap::update_buffers");
402 if( lock_avail ) avail_lock->lock("BC_Bitmap::update_buffers");
403 if( count > max_buffer_count ) count = max_buffer_count;
404 BC_BitmapImage **new_buffers = !count ? 0 : new BC_BitmapImage *[count];
405 if( buffer_count < count ) {
406 for( i=0; i<buffer_count; ++i )
407 new_buffers[i] = buffers[i];
409 BC_BitmapImage *buffer = new_buffer(type, i);
410 new_buffers[i] = buffer;
411 avail.append(buffer);
416 for( i=0; i<count; ++i )
417 new_buffers[i] = buffers[i];
418 while( i < buffer_count ) {
419 BC_BitmapImage *buffer = buffers[i];
420 if( buffer == active_bfr ) active_bfr = 0;
421 if( buffer->is_avail() ) {
432 buffers = new_buffers;
433 buffer_count = count;
434 XFlush(top_level->display);
435 if( lock_avail ) avail_lock->unlock();
436 //top_level->unlock_window();
439 int BC_Bitmap::allocate_data()
442 max_buffer_count = MAX_BITMAP_BUFFERS;
443 if(use_shm) { // Use shared memory.
444 int bsz = best_buffer_size();
445 if( bsz >= 0x800000 ) max_buffer_count = 2;
446 else if( bsz >= 0x400000 ) max_buffer_count /= 8;
447 else if( bsz >= 0x100000 ) max_buffer_count /= 4;
448 else if( bsz >= 0x10000 ) max_buffer_count /= 2;
449 type = hardware_scaling() ? bmXvShmImage : bmXShmImage;
450 count = MIN_BITMAP_BUFFERS;
452 else // use unshared memory.
453 type = hardware_scaling() ? bmXvImage : bmXImage;
454 update_buffers(count);
458 int BC_Bitmap::delete_data()
460 //printf("BC_Bitmap::delete_data 1\n");
464 max_buffer_count = 0;
468 int BC_Bitmap::get_default_depth()
470 return color_model == BC_TRANSPARENCY ? 1 : top_level->default_depth;
473 long BC_Bitmap::best_buffer_size()
475 long pixelsize = BC_CModels::calculate_pixelsize(get_color_model());
476 return pixelsize * w * h;
479 int BC_Bitmap::need_shm()
481 // dont use shm for less than one page
482 return best_buffer_size() < 0x1000 ? 0 :
483 parent_window->get_resources()->use_shm > 0 ? 1 : 0;
486 int BC_Bitmap::set_bg_color(int color)
488 this->bg_color = color;
492 int BC_Bitmap::invert()
494 for( int j=0; j<buffer_count; ++j ) {
495 unsigned char **rows = buffers[j]->get_row_data();
496 if( !rows ) continue;
497 long bytesPerLine = buffers[j]->bytes_per_line();
498 for( int k=0; k<h; ++k ) {
499 unsigned char *bp = rows[k];
500 for( int i=0; i<bytesPerLine; ++i )
507 int BC_XShmImage::get_shm_size()
509 return bytesPerLine * bitmap->h;
512 int BC_Bitmap::write_drawable(Drawable &pixmap, GC &gc,
513 int dest_x, int dest_y, int source_x, int source_y,
514 int dest_w, int dest_h, int dont_wait)
516 return write_drawable(pixmap, gc,
517 source_x, source_y, get_w() - source_x, get_h() - source_y,
518 dest_x, dest_y, dest_w, dest_h, dont_wait);
521 int BC_XImage::write_drawable(Drawable &pixmap, GC &gc,
522 int source_x, int source_y, int source_w, int source_h,
523 int dest_x, int dest_y, int dest_w, int dest_h)
525 XPutImage(top_level->display, pixmap, gc,
526 ximage, source_x, source_y,
527 dest_x, dest_y, dest_w, dest_h);
531 int BC_XShmImage::write_drawable(Drawable &pixmap, GC &gc,
532 int source_x, int source_y, int source_w, int source_h,
533 int dest_x, int dest_y, int dest_w, int dest_h)
535 XShmPutImage(top_level->display, pixmap, gc,
536 ximage, source_x, source_y,
537 dest_x, dest_y, dest_w, dest_h, bitmap->shm_reply);
541 int BC_XvImage::write_drawable(Drawable &pixmap, GC &gc,
542 int source_x, int source_y, int source_w, int source_h,
543 int dest_x, int dest_y, int dest_w, int dest_h)
545 XvPutImage(top_level->display,
546 bitmap->xv_portid, pixmap, gc, xv_image,
547 source_x, source_y, source_w, source_h,
548 dest_x, dest_y, dest_w, dest_h);
552 int BC_XvShmImage::write_drawable(Drawable &pixmap, GC &gc,
553 int source_x, int source_y, int source_w, int source_h,
554 int dest_x, int dest_y, int dest_w, int dest_h)
556 XvShmPutImage(top_level->display,
557 bitmap->xv_portid, pixmap, gc, xv_image,
558 source_x, source_y, source_w, source_h,
559 dest_x, dest_y, dest_w, dest_h, bitmap->shm_reply);
563 int BC_Bitmap::write_drawable(Drawable &pixmap, GC &gc,
564 int source_x, int source_y, int source_w, int source_h,
565 int dest_x, int dest_y, int dest_w, int dest_h,
568 //printf("BC_Bitmap::write_drawable 1 %p %d\n", this, current_ringbuffer); fflush(stdout);
569 //if( dont_wait ) XSync(top_level->display, False);
570 BC_BitmapImage *bfr = cur_bfr();
571 if( !bfr->is_zombie() && is_shared() && shm_reply ) {
572 //printf("activate %p %08lx\n",bfr,bfr->get_shmseg());
573 top_level->active_bitmaps.insert(bfr, pixmap);
574 if( ++active_buffers > max_active_buffers )
575 max_active_buffers = active_buffers;
577 bfr->write_drawable(pixmap, gc,
578 source_x, source_y, source_w, source_h,
579 dest_x, dest_y, dest_w, dest_h);
580 XFlush(top_level->display);
581 avail_lock->lock(" BC_Bitmap::write_drawable");
582 if( bfr->is_zombie() ) {
586 else if( is_unshared() || !shm_reply )
589 avail_lock->unlock();
590 if( !dont_wait && !shm_reply )
591 XSync(top_level->display, False);
596 int BC_XImage::read_drawable(Drawable &pixmap, int source_x, int source_y)
598 XGetSubImage(top_level->display, pixmap,
599 source_x, source_y, bitmap->w, bitmap->h,
600 0xffffffff, ZPixmap, ximage, 0, 0);
604 int BC_XShmImage::read_drawable(Drawable &pixmap, int source_x, int source_y)
606 XShmGetImage(top_level->display, pixmap,
607 ximage, source_x, source_y, 0xffffffff);
611 int BC_Bitmap::read_drawable(Drawable &pixmap, int source_x, int source_y, VFrame *frame)
613 BC_BitmapImage *bfr = cur_bfr();
614 int result = bfr->read_drawable(pixmap, source_x, source_y);
615 if( !result && frame ) result = bfr->read_frame_rgb(frame);
620 // ============================ Decoding VFrames
622 int BC_Bitmap::read_frame(VFrame *frame, int x1, int y1, int x2, int y2)
624 return read_frame(frame,
625 0, 0, frame->get_w(), frame->get_h(),
626 x1, y1, x2 - x1, y2 - y1);
630 int BC_Bitmap::read_frame(VFrame *frame,
631 int in_x, int in_y, int in_w, int in_h,
632 int out_x, int out_y, int out_w, int out_h)
634 BC_BitmapImage *bfr = cur_bfr();
635 if( hardware_scaling() && frame->get_color_model() == color_model ) {
636 // Hardware accelerated bitmap
637 switch(color_model) {
639 memcpy(bfr->get_y_data(), frame->get_y(), w * h);
640 memcpy(bfr->get_u_data(), frame->get_u(), w * h / 4);
641 memcpy(bfr->get_v_data(), frame->get_v(), w * h / 4);
644 memcpy(bfr->get_y_data(), frame->get_y(), w * h);
645 memcpy(bfr->get_u_data(), frame->get_u(), w * h / 2);
646 memcpy(bfr->get_v_data(), frame->get_v(), w * h / 2);
651 memcpy(get_data(), frame->get_data(), w * h + w * h);
658 //printf("BC_Bitmap::read_frame %d -> %d %d %d %d %d -> %d %d %d %d\n",
659 // frame->get_color_model(), color_model,
660 // in_x, in_y, in_w, in_h, out_x, out_y, out_w, out_h);
661 //if(color_model == 6 && frame->get_color_model() == 19)
662 //printf("BC_Bitmap::read_frame 1 %d %d %d %d\n", frame->get_w(), frame->get_h(), get_w(), get_h());
663 BC_CModels::transfer(
664 bfr->get_row_data(), frame->get_rows(),
665 bfr->get_y_data(), bfr->get_u_data(), bfr->get_v_data(),
666 frame->get_y(), frame->get_u(), frame->get_v(),
667 in_x, in_y, in_w, in_h,
668 out_x, out_y, out_w, out_h,
669 frame->get_color_model(), color_model,
670 bg_color, frame->get_w(), w);
672 if( color_model == BC_TRANSPARENCY && !top_level->server_byte_order )
673 transparency_bitswap(frame->get_data(), w, h);
674 //if(color_model == 6 && frame->get_color_model() == 19)
675 //printf("BC_Bitmap::read_frame 2\n");
681 uint8_t BC_Bitmap::bitswap[256]={
682 0x00,0x80,0x40,0xc0,0x20,0xa0,0x60,0xe0,0x10,0x90,0x50,0xd0,0x30,0xb0,0x70,0xf0,
683 0x08,0x88,0x48,0xc8,0x28,0xa8,0x68,0xe8,0x18,0x98,0x58,0xd8,0x38,0xb8,0x78,0xf8,
684 0x04,0x84,0x44,0xc4,0x24,0xa4,0x64,0xe4,0x14,0x94,0x54,0xd4,0x34,0xb4,0x74,0xf4,
685 0x0c,0x8c,0x4c,0xcc,0x2c,0xac,0x6c,0xec,0x1c,0x9c,0x5c,0xdc,0x3c,0xbc,0x7c,0xfc,
686 0x02,0x82,0x42,0xc2,0x22,0xa2,0x62,0xe2,0x12,0x92,0x52,0xd2,0x32,0xb2,0x72,0xf2,
687 0x0a,0x8a,0x4a,0xca,0x2a,0xaa,0x6a,0xea,0x1a,0x9a,0x5a,0xda,0x3a,0xba,0x7a,0xfa,
688 0x06,0x86,0x46,0xc6,0x26,0xa6,0x66,0xe6,0x16,0x96,0x56,0xd6,0x36,0xb6,0x76,0xf6,
689 0x0e,0x8e,0x4e,0xce,0x2e,0xae,0x6e,0xee,0x1e,0x9e,0x5e,0xde,0x3e,0xbe,0x7e,0xfe,
690 0x01,0x81,0x41,0xc1,0x21,0xa1,0x61,0xe1,0x11,0x91,0x51,0xd1,0x31,0xb1,0x71,0xf1,
691 0x09,0x89,0x49,0xc9,0x29,0xa9,0x69,0xe9,0x19,0x99,0x59,0xd9,0x39,0xb9,0x79,0xf9,
692 0x05,0x85,0x45,0xc5,0x25,0xa5,0x65,0xe5,0x15,0x95,0x55,0xd5,0x35,0xb5,0x75,0xf5,
693 0x0d,0x8d,0x4d,0xcd,0x2d,0xad,0x6d,0xed,0x1d,0x9d,0x5d,0xdd,0x3d,0xbd,0x7d,0xfd,
694 0x03,0x83,0x43,0xc3,0x23,0xa3,0x63,0xe3,0x13,0x93,0x53,0xd3,0x33,0xb3,0x73,0xf3,
695 0x0b,0x8b,0x4b,0xcb,0x2b,0xab,0x6b,0xeb,0x1b,0x9b,0x5b,0xdb,0x3b,0xbb,0x7b,0xfb,
696 0x07,0x87,0x47,0xc7,0x27,0xa7,0x67,0xe7,0x17,0x97,0x57,0xd7,0x37,0xb7,0x77,0xf7,
697 0x0f,0x8f,0x4f,0xcf,0x2f,0xaf,0x6f,0xef,0x1f,0x9f,0x5f,0xdf,0x3f,0xbf,0x7f,0xff,
700 void BC_Bitmap::transparency_bitswap(uint8_t *buf, int w, int h)
705 for(i=0 ; i+8<=len ; i+=8){
706 buf[i+0] = bitswap[buf[i+0]];
707 buf[i+1] = bitswap[buf[i+1]];
708 buf[i+2] = bitswap[buf[i+2]];
709 buf[i+3] = bitswap[buf[i+3]];
710 buf[i+4] = bitswap[buf[i+4]];
711 buf[i+5] = bitswap[buf[i+5]];
712 buf[i+6] = bitswap[buf[i+6]];
713 buf[i+7] = bitswap[buf[i+7]];
716 buf[i+0] = bitswap[buf[i+0]];