git.sesse.net Git - ffmpeg/blob - libavformat/grab.c

   1 /*
   2  * Linux video grab interface
   3  * Copyright (c) 2000,2001 Fabrice Bellard.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19 #include "avformat.h"
  20 #include <linux/videodev.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <sys/ioctl.h>
  24 #include <sys/mman.h>
  25 #include <sys/time.h>
  26 #include <time.h>
  27
  28 typedef struct {
  29     int fd;
  30     int frame_format; /* see VIDEO_PALETTE_xxx */
  31     int use_mmap;
  32     int width, height;
  33     int frame_rate;
  34     INT64 time_frame;
  35     int frame_size;
  36     struct video_capability video_cap;
  37     struct video_audio audio_saved;
  38     UINT8 *video_buf;
  39     struct video_mbuf gb_buffers;
  40     struct video_mmap gb_buf;
  41     int gb_frame;
  42
  43     /* ATI All In Wonder specific stuff */
  44     /* XXX: remove and merge in libavcodec/imgconvert.c */
  45     int aiw_enabled;
  46     int deint;
  47     int halfw;
  48     UINT8 *src_mem;
  49     UINT8 *lum_m4_mem;
  50 } VideoData;
  51
  52 static int aiw_init(VideoData *s);
  53 static int aiw_read_picture(VideoData *s, uint8_t *data);
  54 static int aiw_close(VideoData *s);
  55
  56 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
  57 {
  58     VideoData *s = s1->priv_data;
  59     AVStream *st;
  60     int width, height;
  61     int video_fd, frame_size;
  62     int ret, frame_rate;
  63     int desired_palette;
  64     struct video_audio audio;
  65
  66     if (!ap || ap->width <= 0 || ap->height <= 0 || ap->frame_rate <= 0)
  67         return -1;
  68
  69     width = ap->width;
  70     height = ap->height;
  71     frame_rate = ap->frame_rate;
  72
  73     st = av_new_stream(s1, 0);
  74     if (!st)
  75         return -ENOMEM;
  76
  77     s->width = width;
  78     s->height = height;
  79     s->frame_rate = frame_rate;
  80
  81     video_fd = open(video_device, O_RDWR);
  82     if (video_fd < 0) {
  83         perror(video_device);
  84         goto fail;
  85     }
  86
  87     if (ioctl(video_fd,VIDIOCGCAP, &s->video_cap) < 0) {
  88         perror("VIDIOCGCAP");
  89         goto fail;
  90     }
  91
  92     if (!(s->video_cap.type & VID_TYPE_CAPTURE)) {
  93         fprintf(stderr, "Fatal: grab device does not handle capture\n");
  94         goto fail;
  95     }
  96
  97     desired_palette = -1;
  98     if (st->codec.pix_fmt == PIX_FMT_YUV420P) {
  99         desired_palette = VIDEO_PALETTE_YUV420P;
 100     } else if (st->codec.pix_fmt == PIX_FMT_YUV422) {
 101         desired_palette = VIDEO_PALETTE_YUV422;
 102     } else if (st->codec.pix_fmt == PIX_FMT_BGR24) {
 103         desired_palette = VIDEO_PALETTE_RGB24;
 104     }
 105
 106     /* unmute audio */
 107     audio.audio = 0;
 108     ioctl(video_fd, VIDIOCGAUDIO, &audio);
 109     memcpy(&s->audio_saved, &audio, sizeof(audio));
 110     audio.flags &= ~VIDEO_AUDIO_MUTE;
 111     ioctl(video_fd, VIDIOCSAUDIO, &audio);
 112
 113     ret = ioctl(video_fd,VIDIOCGMBUF,&s->gb_buffers);
 114     if (ret < 0) {
 115         /* try to use read based access */
 116         struct video_window win;
 117         struct video_picture pict;
 118         int val;
 119
 120         win.x = 0;
 121         win.y = 0;
 122         win.width = width;
 123         win.height = height;
 124         win.chromakey = -1;
 125         win.flags = 0;
 126
 127         ioctl(video_fd, VIDIOCSWIN, &win);
 128
 129         ioctl(video_fd, VIDIOCGPICT, &pict);
 130 #if 0
 131         printf("v4l: colour=%d hue=%d brightness=%d constrast=%d whiteness=%d\n",
 132                pict.colour,
 133                pict.hue,
 134                pict.brightness,
 135                pict.contrast,
 136                pict.whiteness);
 137 #endif
 138         /* try to choose a suitable video format */
 139         pict.palette = desired_palette;
 140         if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCSPICT, &pict)) < 0) {
 141             pict.palette=VIDEO_PALETTE_YUV420P;
 142             ret = ioctl(video_fd, VIDIOCSPICT, &pict);
 143             if (ret < 0) {
 144                 pict.palette=VIDEO_PALETTE_YUV422;
 145                 ret = ioctl(video_fd, VIDIOCSPICT, &pict);
 146                 if (ret < 0) {
 147                     pict.palette=VIDEO_PALETTE_RGB24;
 148                     ret = ioctl(video_fd, VIDIOCSPICT, &pict);
 149                     if (ret < 0)
 150                         goto fail1;
 151                 }
 152             }
 153         }
 154
 155         s->frame_format = pict.palette;
 156
 157         val = 1;
 158         ioctl(video_fd, VIDIOCCAPTURE, &val);
 159
 160         s->time_frame = av_gettime();
 161         s->use_mmap = 0;
 162
 163         /* ATI All In Wonder automatic activation */
 164         if (!strcmp(s->video_cap.name, "Km")) {
 165             if (aiw_init(s) < 0)
 166                 goto fail;
 167             s->aiw_enabled = 1;
 168             /* force 420P format because convertion from YUV422 to YUV420P
 169                is done in this driver (ugly) */
 170             s->frame_format = VIDEO_PALETTE_YUV420P;
 171         }
 172     } else {
 173         s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,video_fd,0);
 174         if ((unsigned char*)-1 == s->video_buf) {
 175             perror("mmap");
 176             goto fail;
 177         }
 178         s->gb_frame = 0;
 179         s->time_frame = av_gettime();
 180
 181         /* start to grab the first frame */
 182         s->gb_buf.frame = s->gb_frame % s->gb_buffers.frames;
 183         s->gb_buf.height = height;
 184         s->gb_buf.width = width;
 185         s->gb_buf.format = desired_palette;
 186
 187         if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf)) < 0) {
 188             s->gb_buf.format = VIDEO_PALETTE_YUV420P;
 189
 190             ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
 191             if (ret < 0 && errno != EAGAIN) {
 192                 /* try YUV422 */
 193                 s->gb_buf.format = VIDEO_PALETTE_YUV422;
 194
 195                 ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
 196                 if (ret < 0 && errno != EAGAIN) {
 197                     /* try RGB24 */
 198                     s->gb_buf.format = VIDEO_PALETTE_RGB24;
 199                     ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
 200                 }
 201             }
 202         }
 203         if (ret < 0) {
 204             if (errno != EAGAIN) {
 205             fail1:
 206                 fprintf(stderr, "Fatal: grab device does not support suitable format\n");
 207             } else {
 208                 fprintf(stderr,"Fatal: grab device does not receive any video signal\n");
 209             }
 210             goto fail;
 211         }
 212         s->frame_format = s->gb_buf.format;
 213         s->use_mmap = 1;
 214     }
 215
 216     switch(s->frame_format) {
 217     case VIDEO_PALETTE_YUV420P:
 218         frame_size = (width * height * 3) / 2;
 219         st->codec.pix_fmt = PIX_FMT_YUV420P;
 220         break;
 221     case VIDEO_PALETTE_YUV422:
 222         frame_size = width * height * 2;
 223         st->codec.pix_fmt = PIX_FMT_YUV422;
 224         break;
 225     case VIDEO_PALETTE_RGB24:
 226         frame_size = width * height * 3;
 227         st->codec.pix_fmt = PIX_FMT_BGR24; /* NOTE: v4l uses BGR24, not RGB24 ! */
 228         break;
 229     default:
 230         goto fail;
 231     }
 232     s->fd = video_fd;
 233     s->frame_size = frame_size;
 234
 235     st->codec.codec_type = CODEC_TYPE_VIDEO;
 236     st->codec.codec_id = CODEC_ID_RAWVIDEO;
 237     st->codec.width = width;
 238     st->codec.height = height;
 239     st->codec.frame_rate = frame_rate;
 240
 241     av_set_pts_info(s1, 48, 1, 1000000); /* 48 bits pts in us */
 242
 243     return 0;
 244  fail:
 245     if (video_fd >= 0)
 246         close(video_fd);
 247     av_free(st);
 248     return -EIO;
 249 }
 250
 251 static int v4l_mm_read_picture(VideoData *s, UINT8 *buf)
 252 {
 253     UINT8 *ptr;
 254
 255     /* Setup to capture the next frame */
 256     s->gb_buf.frame = (s->gb_frame + 1) % s->gb_buffers.frames;
 257     if (ioctl(s->fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) {
 258         if (errno == EAGAIN)
 259             fprintf(stderr,"Cannot Sync\n");
 260         else
 261             perror("VIDIOCMCAPTURE");
 262         return -EIO;
 263     }
 264
 265     while (ioctl(s->fd, VIDIOCSYNC, &s->gb_frame) < 0 &&
 266            (errno == EAGAIN || errno == EINTR));
 267
 268     ptr = s->video_buf + s->gb_buffers.offsets[s->gb_frame];
 269     memcpy(buf, ptr, s->frame_size);
 270
 271     /* This is now the grabbing frame */
 272     s->gb_frame = s->gb_buf.frame;
 273
 274     return s->frame_size;
 275 }
 276
 277 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
 278 {
 279     VideoData *s = s1->priv_data;
 280     INT64 curtime, delay;
 281     struct timespec ts;
 282     INT64 per_frame = (INT64_C(1000000) * FRAME_RATE_BASE) / s->frame_rate;
 283
 284     /* Calculate the time of the next frame */
 285     s->time_frame += per_frame;
 286
 287     /* wait based on the frame rate */
 288     for(;;) {
 289         curtime = av_gettime();
 290         delay = s->time_frame - curtime;
 291         if (delay <= 0) {
 292             if (delay < -per_frame) {
 293                 /* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */
 294                 s->time_frame += per_frame;
 295             }
 296             break;
 297         }
 298         ts.tv_sec = delay / 1000000;
 299         ts.tv_nsec = (delay % 1000000) * 1000;
 300         nanosleep(&ts, NULL);
 301     }
 302
 303     if (av_new_packet(pkt, s->frame_size) < 0)
 304         return -EIO;
 305
 306     pkt->pts = curtime & ((1LL << 48) - 1);
 307
 308     /* read one frame */
 309     if (s->aiw_enabled) {
 310         return aiw_read_picture(s, pkt->data);
 311     } else if (s->use_mmap) {
 312         return v4l_mm_read_picture(s, pkt->data);
 313     } else {
 314         if (read(s->fd, pkt->data, pkt->size) != pkt->size)
 315             return -EIO;
 316         return s->frame_size;
 317     }
 318 }
 319
 320 static int grab_read_close(AVFormatContext *s1)
 321 {
 322     VideoData *s = s1->priv_data;
 323
 324     if (s->aiw_enabled)
 325         aiw_close(s);
 326
 327     if (s->use_mmap)
 328         munmap(s->video_buf, s->gb_buffers.size);
 329
 330     /* mute audio. we must force it because the BTTV driver does not
 331        return its state correctly */
 332     s->audio_saved.flags |= VIDEO_AUDIO_MUTE;
 333     ioctl(s->fd, VIDIOCSAUDIO, &s->audio_saved);
 334
 335     close(s->fd);
 336     return 0;
 337 }
 338
 339 static AVInputFormat video_grab_device_format = {
 340     "video4linux",
 341     "video grab",
 342     sizeof(VideoData),
 343     NULL,
 344     grab_read_header,
 345     grab_read_packet,
 346     grab_read_close,
 347     .flags = AVFMT_NOFILE,
 348 };
 349
 350 /* All in Wonder specific stuff */
 351 /* XXX: remove and merge in libavcodec/imgconvert.c */
 352
 353 static int aiw_init(VideoData *s)
 354 {
 355     int width, height;
 356
 357     width = s->width;
 358     height = s->height;
 359
 360     if ((width == s->video_cap.maxwidth && height == s->video_cap.maxheight) ||
 361         (width == s->video_cap.maxwidth && height == s->video_cap.maxheight*2) ||
 362         (width == s->video_cap.maxwidth/2 && height == s->video_cap.maxheight)) {
 363
 364         s->deint=0;
 365         s->halfw=0;
 366         if (height == s->video_cap.maxheight*2) s->deint=1;
 367         if (width == s->video_cap.maxwidth/2) s->halfw=1;
 368     } else {
 369         fprintf(stderr,"\nIncorrect Grab Size Supplied - Supported Sizes Are:\n");
 370         fprintf(stderr," %dx%d  %dx%d %dx%d\n\n",
 371                 s->video_cap.maxwidth,s->video_cap.maxheight,
 372                 s->video_cap.maxwidth,s->video_cap.maxheight*2,
 373                 s->video_cap.maxwidth/2,s->video_cap.maxheight);
 374         goto fail;
 375     }
 376
 377     if (s->halfw == 0) {
 378         s->src_mem = av_malloc(s->width*2);
 379     } else {
 380         s->src_mem = av_malloc(s->width*4);
 381     }
 382     if (!s->src_mem) goto fail;
 383
 384     s->lum_m4_mem = av_malloc(s->width);
 385     if (!s->lum_m4_mem)
 386         goto fail;
 387     return 0;
 388  fail:
 389     av_freep(&s->src_mem);
 390     av_freep(&s->lum_m4_mem);
 391     return -1;
 392 }
 393
 394 #ifdef HAVE_MMX
 395 #include "../libavcodec/i386/mmx.h"
 396
 397 #define LINE_WITH_UV \
 398                     movq_m2r(ptr[0],mm0); \
 399                     movq_m2r(ptr[8],mm1);  \
 400                     movq_r2r(mm0, mm4); \
 401                     punpcklbw_r2r(mm1,mm0); \
 402                     punpckhbw_r2r(mm1,mm4); \
 403                     movq_r2r(mm0,mm5); \
 404                     punpcklbw_r2r(mm4,mm0); \
 405                     punpckhbw_r2r(mm4,mm5); \
 406                     movq_r2r(mm0,mm1); \
 407                     punpcklbw_r2r(mm5,mm1); \
 408                     movq_r2m(mm1,lum[0]); \
 409                     movq_m2r(ptr[16],mm2); \
 410                     movq_m2r(ptr[24],mm1); \
 411                     movq_r2r(mm2,mm4); \
 412                     punpcklbw_r2r(mm1,mm2); \
 413                     punpckhbw_r2r(mm1,mm4); \
 414                     movq_r2r(mm2,mm3); \
 415                     punpcklbw_r2r(mm4,mm2); \
 416                     punpckhbw_r2r(mm4,mm3); \
 417                     movq_r2r(mm2,mm1); \
 418                     punpcklbw_r2r(mm3,mm1); \
 419                     movq_r2m(mm1,lum[8]); \
 420                     punpckhdq_r2r(mm2,mm0); \
 421                     punpckhdq_r2r(mm3,mm5); \
 422                     movq_r2m(mm0,cb[0]); \
 423                     movq_r2m(mm5,cr[0]);
 424
 425 #define LINE_NO_UV \
 426                     movq_m2r(ptr[0],mm0);\
 427                     movq_m2r(ptr[8],mm1);\
 428                     movq_r2r(mm0, mm4);\
 429                     punpcklbw_r2r(mm1,mm0); \
 430                     punpckhbw_r2r(mm1,mm4);\
 431                     movq_r2r(mm0,mm5);\
 432                     punpcklbw_r2r(mm4,mm0);\
 433                     punpckhbw_r2r(mm4,mm5);\
 434                     movq_r2r(mm0,mm1);\
 435                     punpcklbw_r2r(mm5,mm1);\
 436                     movq_r2m(mm1,lum[0]);\
 437                     movq_m2r(ptr[16],mm2);\
 438                     movq_m2r(ptr[24],mm1);\
 439                     movq_r2r(mm2,mm4);\
 440                     punpcklbw_r2r(mm1,mm2);\
 441                     punpckhbw_r2r(mm1,mm4);\
 442                     movq_r2r(mm2,mm3);\
 443                     punpcklbw_r2r(mm4,mm2);\
 444                     punpckhbw_r2r(mm4,mm3);\
 445                     movq_r2r(mm2,mm1);\
 446                     punpcklbw_r2r(mm3,mm1);\
 447                     movq_r2m(mm1,lum[8]);
 448
 449 #define LINE_WITHUV_AVG \
 450                     movq_m2r(ptr[0], mm0);\
 451                     movq_m2r(ptr[8], mm1);\
 452                     movq_r2r(mm0, mm4);\
 453                     punpcklbw_r2r(mm1,mm0);\
 454                     punpckhbw_r2r(mm1,mm4);\
 455                     movq_r2r(mm0,mm5);\
 456                     punpcklbw_r2r(mm4,mm0);\
 457                     punpckhbw_r2r(mm4,mm5);\
 458                     movq_r2r(mm0,mm1);\
 459                     movq_r2r(mm5,mm2);\
 460                     punpcklbw_r2r(mm7,mm1);\
 461                     punpcklbw_r2r(mm7,mm2);\
 462                     paddw_r2r(mm6,mm1);\
 463                     paddw_r2r(mm2,mm1);\
 464                     psraw_i2r(1,mm1);\
 465                     packuswb_r2r(mm7,mm1);\
 466                     movd_r2m(mm1,lum[0]);\
 467                     movq_m2r(ptr[16],mm2);\
 468                     movq_m2r(ptr[24],mm1);\
 469                     movq_r2r(mm2,mm4);\
 470                     punpcklbw_r2r(mm1,mm2);\
 471                     punpckhbw_r2r(mm1,mm4);\
 472                     movq_r2r(mm2,mm3);\
 473                     punpcklbw_r2r(mm4,mm2);\
 474                     punpckhbw_r2r(mm4,mm3);\
 475                     movq_r2r(mm2,mm1);\
 476                     movq_r2r(mm3,mm4);\
 477                     punpcklbw_r2r(mm7,mm1);\
 478                     punpcklbw_r2r(mm7,mm4);\
 479                     paddw_r2r(mm6,mm1);\
 480                     paddw_r2r(mm4,mm1);\
 481                     psraw_i2r(1,mm1);\
 482                     packuswb_r2r(mm7,mm1);\
 483                     movd_r2m(mm1,lum[4]);\
 484                     punpckhbw_r2r(mm7,mm0);\
 485                     punpckhbw_r2r(mm7,mm2);\
 486                     paddw_r2r(mm6,mm0);\
 487                     paddw_r2r(mm2,mm0);\
 488                     psraw_i2r(1,mm0);\
 489                     packuswb_r2r(mm7,mm0);\
 490                     punpckhbw_r2r(mm7,mm5);\
 491                     punpckhbw_r2r(mm7,mm3);\
 492                     paddw_r2r(mm6,mm5);\
 493                     paddw_r2r(mm3,mm5);\
 494                     psraw_i2r(1,mm5);\
 495                     packuswb_r2r(mm7,mm5);\
 496                     movd_r2m(mm0,cb[0]);\
 497                     movd_r2m(mm5,cr[0]);
 498
 499 #define LINE_NOUV_AVG \
 500                     movq_m2r(ptr[0],mm0);\
 501                     movq_m2r(ptr[8],mm1);\
 502                     pand_r2r(mm5,mm0);\
 503                     pand_r2r(mm5,mm1);\
 504                     pmaddwd_r2r(mm6,mm0);\
 505                     pmaddwd_r2r(mm6,mm1);\
 506                     packssdw_r2r(mm1,mm0);\
 507                     paddw_r2r(mm6,mm0);\
 508                     psraw_i2r(1,mm0);\
 509                     movq_m2r(ptr[16],mm2);\
 510                     movq_m2r(ptr[24],mm3);\
 511                     pand_r2r(mm5,mm2);\
 512                     pand_r2r(mm5,mm3);\
 513                     pmaddwd_r2r(mm6,mm2);\
 514                     pmaddwd_r2r(mm6,mm3);\
 515                     packssdw_r2r(mm3,mm2);\
 516                     paddw_r2r(mm6,mm2);\
 517                     psraw_i2r(1,mm2);\
 518                     packuswb_r2r(mm2,mm0);\
 519                     movq_r2m(mm0,lum[0]);
 520
 521 #define DEINT_LINE_LUM(ptroff) \
 522                     movd_m2r(lum_m4[(ptroff)],mm0);\
 523                     movd_m2r(lum_m3[(ptroff)],mm1);\
 524                     movd_m2r(lum_m2[(ptroff)],mm2);\
 525                     movd_m2r(lum_m1[(ptroff)],mm3);\
 526                     movd_m2r(lum[(ptroff)],mm4);\
 527                     punpcklbw_r2r(mm7,mm0);\
 528                     movd_r2m(mm2,lum_m4[(ptroff)]);\
 529                     punpcklbw_r2r(mm7,mm1);\
 530                     punpcklbw_r2r(mm7,mm2);\
 531                     punpcklbw_r2r(mm7,mm3);\
 532                     punpcklbw_r2r(mm7,mm4);\
 533                     psllw_i2r(2,mm1);\
 534                     psllw_i2r(1,mm2);\
 535                     paddw_r2r(mm6,mm1);\
 536                     psllw_i2r(2,mm3);\
 537                     paddw_r2r(mm2,mm1);\
 538                     paddw_r2r(mm4,mm0);\
 539                     paddw_r2r(mm3,mm1);\
 540                     psubusw_r2r(mm0,mm1);\
 541                     psrlw_i2r(3,mm1);\
 542                     packuswb_r2r(mm7,mm1);\
 543                     movd_r2m(mm1,lum_m2[(ptroff)]);
 544
 545 #else
 546 #include "../libavcodec/dsputil.h"
 547
 548 #define LINE_WITH_UV \
 549                     lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\
 550                     cb[0]=ptr[1];cb[1]=ptr[5];\
 551                     cr[0]=ptr[3];cr[1]=ptr[7];\
 552                     lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\
 553                     cb[2]=ptr[9];cb[3]=ptr[13];\
 554                     cr[2]=ptr[11];cr[3]=ptr[15];\
 555                     lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\
 556                     cb[4]=ptr[17];cb[5]=ptr[21];\
 557                     cr[4]=ptr[19];cr[5]=ptr[23];\
 558                     lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];\
 559                     cb[6]=ptr[25];cb[7]=ptr[29];\
 560                     cr[6]=ptr[27];cr[7]=ptr[31];
 561
 562 #define LINE_NO_UV \
 563                     lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\
 564                     lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\
 565                     lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\
 566                     lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];
 567
 568 #define LINE_WITHUV_AVG \
 569                     sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \
 570                     sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \
 571                     sum=(ptr[1]+ptr[5]+1) >> 1;cb[0]=sum; \
 572                     sum=(ptr[3]+ptr[7]+1) >> 1;cr[0]=sum; \
 573                     sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \
 574                     sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \
 575                     sum=(ptr[9]+ptr[13]+1) >> 1;cb[1]=sum; \
 576                     sum=(ptr[11]+ptr[15]+1) >> 1;cr[1]=sum; \
 577                     sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \
 578                     sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \
 579                     sum=(ptr[17]+ptr[21]+1) >> 1;cb[2]=sum; \
 580                     sum=(ptr[19]+ptr[23]+1) >> 1;cr[2]=sum; \
 581                     sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \
 582                     sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum; \
 583                     sum=(ptr[25]+ptr[29]+1) >> 1;cb[3]=sum; \
 584                     sum=(ptr[27]+ptr[31]+1) >> 1;cr[3]=sum;
 585
 586 #define LINE_NOUV_AVG \
 587                     sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \
 588                     sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \
 589                     sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \
 590                     sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \
 591                     sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \
 592                     sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \
 593                     sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \
 594                     sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum;
 595
 596 #define DEINT_LINE_LUM(ptroff) \
 597                     sum=(-lum_m4[(ptroff)]+(lum_m3[(ptroff)]<<2)+(lum_m2[(ptroff)]<<1)+(lum_m1[(ptroff)]<<2)-lum[(ptroff)]); \
 598                     lum_m4[(ptroff)]=lum_m2[(ptroff)];\
 599                     lum_m2[(ptroff)]=cm[(sum+4)>>3];\
 600                     sum=(-lum_m4[(ptroff)+1]+(lum_m3[(ptroff)+1]<<2)+(lum_m2[(ptroff)+1]<<1)+(lum_m1[(ptroff)+1]<<2)-lum[(ptroff)+1]); \
 601                     lum_m4[(ptroff)+1]=lum_m2[(ptroff)+1];\
 602                     lum_m2[(ptroff)+1]=cm[(sum+4)>>3];\
 603                     sum=(-lum_m4[(ptroff)+2]+(lum_m3[(ptroff)+2]<<2)+(lum_m2[(ptroff)+2]<<1)+(lum_m1[(ptroff)+2]<<2)-lum[(ptroff)+2]); \
 604                     lum_m4[(ptroff)+2]=lum_m2[(ptroff)+2];\
 605                     lum_m2[(ptroff)+2]=cm[(sum+4)>>3];\
 606                     sum=(-lum_m4[(ptroff)+3]+(lum_m3[(ptroff)+3]<<2)+(lum_m2[(ptroff)+3]<<1)+(lum_m1[(ptroff)+3]<<2)-lum[(ptroff)+3]); \
 607                     lum_m4[(ptroff)+3]=lum_m2[(ptroff)+3];\
 608                     lum_m2[(ptroff)+3]=cm[(sum+4)>>3];
 609
 610 #endif
 611
 612
 613 /* Read two fields separately. */
 614 static int aiw_read_picture(VideoData *s, uint8_t *data)
 615 {
 616     UINT8 *ptr, *lum, *cb, *cr;
 617     int h;
 618 #ifndef HAVE_MMX
 619     int sum;
 620 #endif
 621     UINT8* src = s->src_mem;
 622     UINT8 *ptrend = &src[s->width*2];
 623     lum=data;
 624     cb=&lum[s->width*s->height];
 625     cr=&cb[(s->width*s->height)/4];
 626     if (s->deint == 0 && s->halfw == 0) {
 627         while (read(s->fd,src,s->width*2) < 0) {
 628             usleep(100);
 629         }
 630         for (h = 0; h < s->height-2; h+=2) {
 631             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
 632                 LINE_WITH_UV
 633                     }
 634             read(s->fd,src,s->width*2);
 635             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
 636                 LINE_NO_UV
 637                     }
 638             read(s->fd,src,s->width*2);
 639         }
 640         /*
 641          * Do last two lines
 642          */
 643         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
 644             LINE_WITH_UV
 645                 }
 646         read(s->fd,src,s->width*2);
 647         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
 648             LINE_NO_UV
 649                 }
 650         /* drop second field */
 651         while (read(s->fd,src,s->width*2) < 0) {
 652             usleep(100);
 653         }
 654         for (h = 0; h < s->height - 1; h++) {
 655             read(s->fd,src,s->width*2);
 656         }
 657     } else if (s->halfw == 1) {
 658 #ifdef HAVE_MMX
 659         mmx_t rounder;
 660         mmx_t masker;
 661         rounder.uw[0]=1;
 662         rounder.uw[1]=1;
 663         rounder.uw[2]=1;
 664         rounder.uw[3]=1;
 665         masker.ub[0]=0xff;
 666         masker.ub[1]=0;
 667         masker.ub[2]=0xff;
 668         masker.ub[3]=0;
 669         masker.ub[4]=0xff;
 670         masker.ub[5]=0;
 671         masker.ub[6]=0xff;
 672         masker.ub[7]=0;
 673         pxor_r2r(mm7,mm7);
 674         movq_m2r(rounder,mm6);
 675 #endif
 676         while (read(s->fd,src,s->width*4) < 0) {
 677             usleep(100);
 678         }
 679         ptrend = &src[s->width*4];
 680         for (h = 0; h < s->height-2; h+=2) {
 681             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
 682                 LINE_WITHUV_AVG
 683                     }
 684             read(s->fd,src,s->width*4);
 685 #ifdef HAVE_MMX
 686             movq_m2r(masker,mm5);
 687 #endif
 688             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
 689                 LINE_NOUV_AVG
 690                     }
 691             read(s->fd,src,s->width*4);
 692         }
 693         /*
 694  * Do last two lines
 695  */
 696         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
 697             LINE_WITHUV_AVG
 698                 }
 699         read(s->fd,src,s->width*4);
 700 #ifdef HAVE_MMX
 701         movq_m2r(masker,mm5);
 702 #endif
 703         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
 704             LINE_NOUV_AVG
 705                 }
 706         /* drop second field */
 707         while (read(s->fd,src,s->width*4) < 0) {
 708             usleep(100);
 709         }
 710         for (h = 0; h < s->height - 1; h++) {
 711             read(s->fd,src,s->width*4);
 712         }
 713     } else {
 714         UINT8 *lum_m1, *lum_m2, *lum_m3, *lum_m4;
 715 #ifdef HAVE_MMX
 716         mmx_t rounder;
 717         rounder.uw[0]=4;
 718         rounder.uw[1]=4;
 719         rounder.uw[2]=4;
 720         rounder.uw[3]=4;
 721         movq_m2r(rounder,mm6);
 722         pxor_r2r(mm7,mm7);
 723 #else
 724         UINT8 *cm = cropTbl + MAX_NEG_CROP;
 725 #endif
 726
 727         /* read two fields and deinterlace them */
 728         while (read(s->fd,src,s->width*2) < 0) {
 729             usleep(100);
 730         }
 731         for (h = 0; h < (s->height/2)-2; h+=2) {
 732             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
 733                 LINE_WITH_UV
 734                     }
 735             read(s->fd,src,s->width*2);
 736             /* skip a luminance line - will be filled in later */
 737             lum += s->width;
 738             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
 739                 LINE_WITH_UV
 740                     }
 741             /* skip a luminance line - will be filled in later */
 742             lum += s->width;
 743             read(s->fd,src,s->width*2);
 744         }
 745         /*
 746  * Do last two lines
 747  */
 748         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
 749             LINE_WITH_UV
 750                 }
 751         /* skip a luminance line - will be filled in later */
 752         lum += s->width;
 753         read(s->fd,src,s->width*2);
 754         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
 755             LINE_WITH_UV
 756                 }
 757         /*
 758  *
 759  * SECOND FIELD
 760  *
 761  */
 762         lum=&data[s->width];
 763         while (read(s->fd,src,s->width*2) < 0) {
 764             usleep(10);
 765         }
 766         /* First (and last) two lines not interlaced */
 767         for (h = 0; h < 2; h++) {
 768             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
 769                 LINE_NO_UV
 770                     }
 771             read(s->fd,src,s->width*2);
 772             /* skip a luminance line */
 773             lum += s->width;
 774         }
 775         lum_m1=&lum[-s->width];
 776         lum_m2=&lum_m1[-s->width];
 777         lum_m3=&lum_m2[-s->width];
 778         memmove(s->lum_m4_mem,&lum_m3[-s->width],s->width);
 779         for (; h < (s->height/2)-1; h++) {
 780             lum_m4=s->lum_m4_mem;
 781             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16,lum_m1+=16,lum_m2+=16,lum_m3+=16,lum_m4+=16) {
 782                 LINE_NO_UV
 783
 784                     DEINT_LINE_LUM(0)
 785                     DEINT_LINE_LUM(4)
 786                     DEINT_LINE_LUM(8)
 787                     DEINT_LINE_LUM(12)
 788                     }
 789             read(s->fd,src,s->width*2);
 790             /* skip a luminance line */
 791             lum += s->width;
 792             lum_m1 += s->width;
 793             lum_m2 += s->width;
 794             lum_m3 += s->width;
 795             //                lum_m4 += s->width;
 796         }
 797         /*
 798  * Do last line
 799  */
 800         lum_m4=s->lum_m4_mem;
 801         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, lum_m1+=16, lum_m2+=16, lum_m3+=16, lum_m4+=16) {
 802             LINE_NO_UV
 803
 804                 DEINT_LINE_LUM(0)
 805                 DEINT_LINE_LUM(4)
 806                 DEINT_LINE_LUM(8)
 807                 DEINT_LINE_LUM(12)
 808                 }
 809     }
 810 #ifdef HAVE_MMX
 811     emms();
 812 #endif
 813     return s->frame_size;
 814 }
 815
 816 static int aiw_close(VideoData *s)
 817 {
 818     av_freep(&s->lum_m4_mem);
 819     av_freep(&s->src_mem);
 820     return 0;
 821 }
 822
 823 int video_grab_init(void)
 824 {
 825     av_register_input_format(&video_grab_device_format);
 826     return 0;
 827 }